Welcome to TiddlyWiki created by Jeremy Ruston, Copyright © 2007 UnaMesa Association
|!Model | !System | !Resolution | !Pixel Number | !Brightness | !Cont. Ratio | !Aspect | !Bulb | !Throw Range | !Info |
|[[Optoma 1690|http://www.optoma.ca/Product_detail.asp?product_id=277]] | 0.65" [[DDR]] DLP | WXGA | 1280 x 768 | 2500 L | 2500:1 | 16:9 Native, 4:3 Compatible | 220W UHP | 5' - 40' | EP1690 |
Reading suggests higher Lumen projectors require more cooling, thus more noise. Is this true?
!!Adjustable Iris
[[Contrast & Adjustable Iris - Christie|http://www.christiedigital.com/AMEN/TechnologyMovies/technologyExplained/ContrastIris.htm]]
!!Oct.19/07 - [[SG]]
* part of the costs should be allocated to a robust carrying case for the projector.
!!Oct.10/07 - [[CB]]
>First I must apologize... I found a reference to BrilliantColor in an Optoma EP1690 press release, so it apparently does have it. (Unbelievably, it is mentioned nowhere in the Optoma specs on their website, just their proprietary VividColor!)
>
>As a follow-up to my note yesterday in which I showed the decision making process I followed to reduce the huge list of projectors down to two candidates, I glossed over the decision that eliminated [[LCD]]s I eliminated [[LCD]]s for the following four reasons:
>
>1) [[LCD]] colour fades over time, [[DLP]] doesn’t. (here is a link to tests on color reliability over time, see http://www.dlp.com/projectors/vs_lcd.aspx
>2) ScreenDoorEffect... need I say more?
>3) [[DLP]] utilizes a sealed projection unit... no dust, lower maintenance required
>4) [[DLP]] has higher ContrastRatio than [[LCD]].
>
>To further clarify why I think that not only should we be buying a [[DLP]] projector, but that we should buy one with BrilliantColor ™, I have enclosed a [[PDF - BrilliantColor White Paper|http://www.orangevillecameraclub.ca/projector/docs/168_BrilliantColor_white_paper.pdf]] of a TI white paper that explains (quite clearly) how BrilliantColor adds to the [[DLP]] advantage by increasing the gamut of the projector and allowing more saturated colours while providing a 50% brightness boost at the same time.
!!Oct.9/07 - [[CB]]
>I’ve spent another half day at the computer, doing research on BrilliantColor and trying to find which projectors use this technology. I will try to sum up what I have found and what my conclusions are in the following couple of paragraphs for you to put on the wiki: (Note that I have updated the data sheet and also there is now a second tab on the spreadsheet that shows what I think should be our “shortlist”... I will explain below.)
>
>Further to our “required features” of 1024x768 NativeResolution, brightness of 2500+ lumen and list pricing under about $1500 CDN, my reading indicates that we should focus on DLP and add the requirement for TI’s BrilliantColor technology. TI, the inventor of DLP, first came out with this technology in 2005 and significantly upgraded it this year. It allows a 50% increase in brightness in a projector’s “Photo mode” over a regular DLP projector while delivering more accurate colour than regular DLP. It uses a six-colour wheel to produce more colours and apparently reduces (eliminates?) [[rainbowing|RainbowEffect]]. Many manufacturers are implementing BrilliantColor in their new projectors, but most are putting it only in their high-end machines (we can’t afford them). I can only find two manufacturers, Dell and ~BenQ that have put this into machines that are within our budget. I have submitted a spreadsheet that shows the specs on the four models that come close to meeting our feature requirements. The price on the BenQMP622 is approximate; it is so new to the marketplace that the Canadian suppliers don’t have it on their product lists yet. (I’ll try calling some sources tomorrow (Tuesday) to nail this down. I may get a better price on the Dell than that shown, but it will take a couple of days to get the quote.
>
>Does the group agree with my logic in using BrilliantColor to reduce the list to four choices? If so, let me proceed in the same way to further reduce the list.
>
>Of these four, the BenQMP622c is only 2200 lumen so we may want to set it aside for the moment and focus on its bigger brother the BenQMP622 with 2700 lumen. The BenQMP770 is at the top end of our price range (maybe above it??) so we may want to set it aside too. If so, then your work is reduced to getting familiar with the two remaining units; the Dell2400MP and the BenQMP622. To relate to something you have seen, the projectorreviews.com review for the Optoma EP1690 we saw used at our first meeting said the Dell has better colour than the Optoma (and is brighter). According to a CNET review the Dell has a slight yellow colour cast, runs hot (exhaust of 100 F) and has noticeable noise at 34db. This review was over a year old. I have not been able to find out whether Dell has updated their machine since then, particularly whether they have implemented the latest BrilliantColor. I have not yet found a review of the ~BenQ (too new?) but in its specs I see that it runs much quieter.
>
>Here is the link to [[Cnet reviews - Dell2400MP|http://reviews.cnet.com/projectors-presentation-devices/dell-2400mp-projector/4505-3180_7-31878925-.html?tag=sub]]
>
>link to BenQ MP622 - http://www.benq.us/page/?pageId=81
!!Oct.6/07 - [[JK]] & [[MK]]
>Saturday Jan and I had a conversation about his Optoma EP1690. Seems over the last week he had to return it for and get a replacement unit (displayed bars through the images). Since our last discussion, he has modified his opinion of the unit, wishing it had more color detail controls and explained that he has noticed RainbowEffect at times. "its bright, high resolution, a nice projector, but I (Jan) don't think it is what we want for the club. A LCD projector may be better the club."
!!Oct.3/07 - [[CB]]
>The $999 Dell with 3000 lumen, Darkchip and Brilliantcolor is looking better to me all the time.
!!Oct.3/07 - [[MK]]
>I found the task (the projector comparison) quite daunting, there are so may projectors to consider. I was concentrating on projectors 2500(and higher)Lumens, $1000 to$1500 (I was thinking wholesale might bring $1500 down to within our range)
!!Oct.2/07 - [[CB]]
>...I had decided that DLP was the way to go and that the Optoma units looked to give the best lumen bang for the buck. Then I started to read reviews for the units on the list (from projectorreviews.com) and I had my assumptions about brightness and colour rattled by the Optoma 1690 review: see EP1690, LumensAndColorTemperature
>So where am I now? I thought the Optoma was pretty good, then I read that the Dell has better colour accuracy at an effective 1000 lum versus Optoma’s 530 lum (when set to video and calibrated). Now I’m wondering about my assumption that DLP was better than LCD... the reading continues...
!!P.W. Sept.18/2007
"I own an example of a Digital Projector for about $1000 that does not meet our needs. I have had it about one year and it gets worse as time goes by. It is OK for general presentations, but not for photographic presentations"
>At our Sept.18 Meeting we had a chance to see this projector in action. It did not appear to be very bright and projected image was quite pixelated. Text was almost illegible. M.K.
|!Model | !System | !Resolution | !Pixel Number | !Brightness | !Cont. Ratio | !Bulb |
|Epson Powerlite S3 | 3xLCD | SVGA | 800 x 600 | 1600 L | 500:1 | 135W UHE |
!!J.K. Sept.18/2007
Jan did not make any comments about his projector at the last meeting, but his projector hosted our images at that meeting and I feel its performance speaks for itself. The Optoma EP1690 is presently available at [[BestBuy|http://www.bestbuy.ca/catalog/proddetail.asp?sku_id=0926INGFS10077636&catid=20373&logon=&langid=EN]] for $1,199.
''CORRECTION'' - I just recieved this in an email from Jan:
>One comment made contains the following:
>'Out of the box, the Color Temperature control was not properly calibrated. Settings 1 and 3 were identical and measured around 5500K, which is generally too warm for data/graphics display. Setting 2 was slightly colder, but did not correspond with 6500K, which would be ideal for digital photography and video use. However, you can adjust each of these settings to your taste and save your adjustments. Once you do so, you can switch between them at will for use with data, color photography, video gaming, or video.'
>Out of the box colour temperature of 5500K is pretty good for digital images and might require a bit of tweaking only. ...I'm still searching for a way to improve saturation if it's possible.
|!Model | !System | !Resolution | !Pixel Number | !Brightness | !Cont. Ratio | !Aspect | !Bulb | !Throw Range |
|[[Optoma 1690|http://www.optoma.ca/Product_detail.asp?product_id=277]] | 0.65" DDR DLP | UXGA | 1280 x 768 | 2500 L | 2500:1 | 16:9 Native, 4:3 Compatible | 220W UHP | 5' - 40' |
!!S.G. - Sept 11/2007
>... this summer I was researching that topic in depth for my home ... the best bang for buck for a hi-res is probably the Epson Home 1080. I didn't purchase it as I went for the JVC RS-1 instead, the Epson is about $3800, good ones aren't cheap! which is about the price you will be shooting for I think.
>If folks think that a $1K projector will do it, they need to research a tad more, and the club needs to save up for a bit longer.
>Attached are its specs for example. Going for a 720 projector, like a Panasonic AX-100U makes it more affordable, at around $2K. Here's a collection of projector reviews:
>- http://www.projectorcentral.com/home-theater-multimedia-projectors.htm
!Aspect Ratio or Screen Ratio
Common Ratios
* 4:3 - four pixels wide for every three pixels high.
* 5:4
* 16:9 - for the emerging HDTV standard
As near as I can tell BrilliantColor™ is owned by Texas Instruments.
* Several DLP customers will be showing new products using BrilliantColor technology at ~InfoComm including ~BenQ, Mitsubishi, NEC, Optoma, Sharp, Toshiba, and more. - ReF1
* DLP projectors featuring BrilliantColor technology utilize up to 6 separate colors: red, blue, green, cyan, yellow and magenta for a wider variety of accurate, vibrant colors that won’t fade over time. - ReF1
* BrilliantColor technology enables a 50 percent increase in brightness of colors and expands the color palette beyond only three basic colors offered by the competing technologies such as LCD. - ReF1
* Key benefits of DLP projectors include: smoother images with no “ScreenDoorEffect"; crisp and clear presentation of fast motion video; vibrant colors created by its BrilliantColor technology; and proven reliability across all facets – picture reliability over time (no fading, yellowing or color decay over time as compared to other display technologies), overall performance and dust-resistance. - ReF2
!!White Paper
[[Introducing BrilliantColor(tm) Technology - TexasInstruments|http://www.dlp.com/downloads/default.aspx?&ref=/downloads/white_papers/168_BrilliantColor_white_paper.pdf]]
!!Movies
* [[BrilliantColor - Christie|http://www.christiedigital.com/AMEN/TechnologyExplained/TheProjector/ChristieBrilliantColor.htm]]
* [[BrilliantColorTexas Instruments|http://www.dlp.com/includes/demo_hdtv.aspx]]
* Mitsubishi ~XD510U -not available
!!Reviews
*[[projectorreviews.com|http://www.projectorreviews.com/reviews.php]]
* http://www.presentationtek.com
* http://presentationmaster.digitalmedianet.com/
!!Articles
* [[Projectors for Photographers|http://www.projectorpeople.com/resources/photography-projection.asp]] - (The Projector People)
* [[Which Projector Should I Buy?|http://www.popphoto.com/cameraaccessories/4464/which-projector-should-i-buy.html]] - (~PopPhoto.com)
!!Projector Search Tools
* [[Projector Finder by the Projector People|http://www.projectorpeople.com/projectors/projector-finder.asp]] - search for projectors based upon your criteria (works well)
* [[Projector Central - Projector Finder|http://www.projectorcentral.com/projectors.cfm]]
* http://www.aboutprojectors.com/portable-projectors.html
* http://www.retrevo.com/samples/Benq-Projector.html
>This is a link to a site that crawls the web for appropriate content and lets you search by manufacturer and model. The link is currently set to ~BenQ. To select a new manufacturer, just click the letter in the left pane (like “E” for Epson) then scroll down the list that comes up in the main pane to find “Epson Projector Reviews”. Click on this to get a list of all Epson projectors. Click on the projector you want to know about and you are presented with a summary sorted into Professional Review & Articles, Forums & Blogs and Shopping Site Reviews. More detailed lists of each are available via the tabs along the top. - [[CB]]
!!General Links
* http://www.projectorpeople.com
* http://www.projectorpeople.com/resources/bp_buyersguide.asp
* http://www.projectorpeople.com/projectors/all-projector-brands.asp
* [[Circuit City Comparison of DLP and LCD|http://www.circuitcity.com/rpsm/edOid/121293/rpem/ccd/lookLearn.do]]
* http://www.effectivemeetings.com/technology/mrtools/choose_projector.asp
* http://www.projectorcentral.com/
!CB = Craig
contributed by Craig
* [[Color Sample Image for Display Calibration from Silvano|SampleImage]]
* [[Canon Throw Distance Calculator|http://www.usa.canon.com/app/flash/projector/canon_throw_tool_v3-5.swf]] - requires internet access
* [[Epson Image Size Calculator|http://www.epson.ca/cgi-bin/ceStore/Landing/ProjectorCalculator.jsp?BV_UseBVCookie=yes]]
* [[Christie Lens Calculator|http://www.christiedigital.com/christie/tools/ChristieLensCalculator.aspx?region=AMEN]]
|>|>|>|>|>|>|>| !Target Specifications for Pending Projector Purchase |
| As of Date | [[Technology|ProjectorTechnology]] [[LCD]]/[[DLP]] | [[Resolution]] | NativeResolution | LightOutput (Lumens) | ContrastRatio | AspectRatio | Cost($) |
| Oct.12 | LCD | XGA | 1024x768(px) | 2000 or more | 400:1 or better | 4:3 | 1500 |
|~| DLP | XGA | 1024x768(px) | 2500 or more | 2000:1 or better | 4:3 | 1500 |
|>|>|>|>|>|>|>|''Please note we have separate target specification for LCD and DLP technologies'' |
* Some manufacturers utilize 6 colors for color reproduction as opposed to only 3 colors. This process is supposed to offer better color reproduction. (eg. [[Christie - BrilliantColor|http://www.christiedigital.com/AMEN/TechnologyExplained/TheProjector/ChristieBrilliantColor.htm]]
Color break-up is a phenomenon sometimes associated with single-chip color sequential projection systems. It's known as the 'rainbow effect', where the image blurs and separates into its three component colors around the edges. - from [[3LCD|http://www.3lcd.com/gentle.html]]
!Movie
[[3LCD Demonstrates ColorBreak-up|http://www.3lcd.com/eg/pup_1_e.html]]
* Color Decay is the phenomenon of a projector losing its color integrity with use over time. This may show up as a yellow or green tint on the screen. A study was recently conducted by Intertek, an independent testing laboratory, comparing the length of time it takes before a picture starts to lose its color integrity across both DLP® and LCD technology projectors on three on/off cycles. All of the LCD units running in each cycle developed unacceptable Color Decay in the quality of the projected image. This was not the case for the projectors based on DLP® technology. - ReF3
Advanced color wheels are used in single chip DLP projection to convert the monochrome picture into color. When the color wheel spins, it causes red, green and blue light to fall sequentially on to the DMD chip. When on and off states of these tiny mirrors are coordinated with these flashes of light, over a billion colors can be created.
Single chip DLP projectors equipped with a premium Xenon illumination system, utilize an advanced 6-segment color wheel for exceptional color rendition. The 6-segment color wheel also eliminates color image artifacts from fast moving images.
Those single chip Christie projectors utilizing UHP illumination systems use a 4-segment color wheel. The color wheel consist of a red, green, blue and a clear segment, where the clear segment lets more white light hit the DMD chip and reflect a brighter image. - from [[Christie|http://www.christiedigital.com/AMEN/TechnologyMovies/technologyExplained/AdvancedColorWheel.htm]]
* Some reading suggests that color wheels rotate at different speeds and faster color wheels are supposed to reduce the RainbowEffect.
!!Movies
[[Advanced Color Wheel|http://www.christiedigital.com/AMEN/TechnologyMovies/technologyExplained/AdvancedColorWheel.htm]]
!!Links
* http://www.petitiononline.com/BENQPROJ/petition.html
| !DLP Components | !LCD Components | !Universal Components |
| [[DMD]] | PolySiliconTFT | Bulbs - [[UHP]], [[NHS]] |
| DDP2000 || AdjustableIris |
| DDP2230 || InternalScaler |
| DDP3020 |||
| ColorWheel |||
| [[Discovery1100]] |||
| [[Discovery3000]] |||
!!Connection - PC to Projector
* DVI - (digital video interface) connectivity allows projectors to display digital signals from a computer or other visual source as digital information. Until very recently, projectors have used an internal video card to convert digital signals to traditional analog, which is subject to flickering and occasionally looks jittery on the screen. DVI brings the ability to display "true" digital instead of the converted hybrid. - from [[Christie|http://www.christiedigital.com/AMEN/TechnologyExplained/TheProjector/ProjectorBasics/DVIHDTV.htm]]
* HDTV - the new worldwide standard for broadcasting, is moving closer to widespread use, and forward-looking projector manufacturers are configuring their models to be compatible. The most immediate difference in a projection context is the very visible change in aspect ratio (the relationship between the width and height of the screen) from 4:3 to 16:9. XGA, SXGA+, UXGA and QXGA are forms of 4:3 resolution; WXGA, ~HD2 and HD are wide-screen counterparts to XGA and SXGA capable of creating HDTV's 16:9 aspect ratio. - from [[Christie|http://www.christiedigital.com/AMEN/TechnologyExplained/TheProjector/ProjectorBasics/DVIHDTV.htm]]
Contrast Ratio: the ratio of light output between the very brightest and very darkest part of the image on the screen.
HIGHER CONTRAST = HIGHER IMPACT. The higher the contrast, the more compelling the presentation. High-contrast images have a fuller range of luminance levels.
You can never have too much brightness or contrast ratio to create eye-popping results. But it's not easy to achieve them in many environments, especially where high ambient light levels threaten to wash out an image. One of the most important image quality parameters is the contrast of the image.
An example of an excellent contrast ratio can be found in any good movie theater. With its low ambient light, most real-life situations faced by video projection specialists are not as forgiving. Where the screen is flooded with contrast reducing ambient light washing out the image. To overcome this, a projector must combine raw light output power and an outstanding contrast ratio.
One informal test we like is to show an image of a piece of charcoal on a brightly lit white blanket. An extraordinary projection system will reveal both the surfaces and subtle shadings of the charcoal without sacrificing either the whiteness of the blanket or "washing out" its texture, even in a room that leaks a lot of light on to the screen. But the test we think everyone should use is the ANSI contrast checkerboard used often in highly publicized "shoot-outs" between competing projection systems.
One of the most revealing formal tests of a system's contrast ratio is its ability to properly render the 50% driven ANSI checkerboard pattern. Developed by ANSI, an industry standards group of which Christie is an active member, the test:
* Permits unambiguous comparisons between systems
* Allows you to see and accurately measure the difference between a merely bright system and a more advanced system that can deliver both sufficient blacks and bright whites simultaneously
* Reveals the artificiality of some vendor contrast ratio claims
* Based on measuring all-black and all-white screens separately and using a ratio of the two artificial results
Source: [[Contrast Ratios : Christie's Guide to Digital Projector Basics|http://www.christiedigital.com/AMEN/TechnologyExplained/TheProjector/ProjectorBasics/ContrastRatios.htm]]
Contrast Ratio: the ratio of light output between the very brightest and very darkest part of the image on the screen.
!!Articles
http://en.wikipedia.org/wiki/Contrast_ratio#Methods_of_measurement
[[Contrast Ratios - Christie's Guide to Digital Projector Basics|Contrast Ratios - Christie's Guide to Digital Projector Basics]]
!D-ILA = Digital Direct Drive Image Light Amplifier
JVC Technology which uses Liquid crystal on silicon (LCOS or LCoS) is a "micro-projection" or "micro-display" technology typically applied in projection televisions. It is a reflective technology similar to DLP projectors; however, it uses liquid crystals instead of individual mirrors. By way of comparison, LCD projectors use transmissive LCD chips, allowing light to pass through the liquid crystal. In LCoS, liquid crystals are applied directly to the surface of a silicon chip coated with an aluminized layer, with some type of passivation layer, which is highly reflective.
LCoS technology can produce much higher resolution images using highly advanced silicon technology than liquid crystal display and plasma display technologies, which makes it less expensive to implement in such devices as televisions. ReF4
In three-panel designs, there is one display chip per color, and the images are combined optically. In single-panel designs, one display chip shows the red, green, and blue components in succession with the observer's eyes relied upon to combine the color stream. As each color is presented, a color wheel (or an RGB LED array) illuminates the display with only red, green or blue light. If the frequency of the color fields is lower than about 540 Hz, an effect called color breakup is seen, where false colors are briefly perceived when either the image or the observer's eye is in motion. ReF4
Structure of D-ILA® - ReF5
The D-ILA® (Digital Direct Drive Image Light Amplifier) technology that JVC has developed is based on an innovation in microchip design that permits the viewer to enjoy the full range of benefits from any high quality source whether from a video deck or a computer device. For true HDTV performance, the D-ILA® technology packs 2048 x 1536 pixels -a total of 3.2 million pixels- on a single 1.3" chip. This makes possible display of HD images at full-spec resolution of 1920 x 1080 -with room to spare.
The D-ILA®'s innovative CMOS design is the key to reproducing all the details in a high-definition picture. By placing the matrix addressing switches and electronics right behind (not between) the light-modulating liquid crystal layer, JVC has created a D-ILA® chip with a "3-dimensional" layout. The result is a 93% fill factor and virtual elimination of the annoying "grid" or "screen door effect" so evident in other fixed matrix display technologies.
What is the end result? Images as smooth and natural as film with impeccable reproduction of all the details and information contained in the original source. What supports this high picture quality is high brightness, high resolution, high contrast and analog gradation. High brightness and high resolution are achieved using a reflective device with a high aperture ratio and high-density pixels, providing real resolution with invisible pixels. High contrast is achieved using vertical alignment liquid crystals of normally black operation and a high-precision optical system. Analog gradation makes it possible to reproduce dark areas with high S/N (signal-to-noise ratio) because the D-ILA® device has an S-shape response. In combination with the high-speed response of the vertical alignment liquid crystal, JVC's D-ILA® technology makes it possible to reproduce smooth, noiseless motion pictures with clear, sharp high definition and film-like picture quality. ReF5
DDP2000 ASIC chip set
!!Term Usage
0.55", 1-Chip DMD, 12 deg. DDR, DDP2000 (Native Resolution 1024 x 768)
DDP2230 ASIC chip set
This Chip set seems tobe associated with BrilliantColor and DynamicBlack.
[[DMD]]s possible supported range from 0.55" SVGA via 0.55" XGA to 0.65" WXGA.
* 0.7", 1-Chip DMD, 12 deg. LVDS, DarkChip 3™ with DDP3020
* 0.65", 1-Chip DMD, 12 deg. LVDS, DarkChip 2™ with DDP3020
!!DDR = Double Data Rate Technology
!!DLP = Digital Light Processing
This technology is owned by Texas Instruments and uses a [[DMD]].
The images projected onto the screen from the projector, are formed from the projection source using a reflective technology called Digital Light Processing (DLP).
The DLP processing board uses a digital micro-mirror device or DMD; which acts as a light switch.
Inside each DMD chip are many tiny mirrors, which correspond to 1 pixel of light in the projected image. The tiny mirrors tilt towards or away from the light source thousands of times a second to produce up to 1024 shades of grey.
In a 3-chip DLP system, white light is passed through a prism that divides the light into red, green and blue. Each chip is dedicated to a primary color. The red, green and blue reflections from the 3 chips are combined and passed through the lens to project an image made up of more than 35 trillion colors. - from [[Christie|http://www.christiedigital.com/AMEN/TechnologyMovies/technologyExplained/3ChipDLP.htm]]
LCDvsDLP
BrilliantColor
!!Links to DLP articles
* http://en.wikipedia.org/wiki/DLP
* [[Article - Evolution of DLP|http://hiddenwires.co.uk/resourcesarticles2007/articles20070604-04.html]]
* [[Article - Choosing a DLP Projector|http://hiddenwires.co.uk/resourcesarticles2004/articles20040301-04.html]]
* [[How DLP Technology Works (DLP-Texas Instruments)|http://www.dlp.com/tech/what.aspx]]
* http://www.dlptvshowcase.com/darkchip-dlp-tv.asp
!!Movies & Demos about DLP
* [[Christie - Movie about DLP Technology|http://www.christiedigital.com/AMEN/TechnologyExplained/TheProjector/ChristieBrilliantColor.htm]]
* [[Movie from Optoma discribing DLP technology|http://www.themescene.tv/dlp.aspx]]
* [[Texas Instruments|http://www.dlp.com/includes/demo_flash.aspx]]
!!Chip Technology
* http://focus.ti.com/docs/solution/folders/print/360.html#prodbulwp
* http://focus.ti.com/dlpdmd/docs/dlpdmdhomepage.tsp?familyId=767&contentType=15
* describes a single chip Digital Light Processing System - see [[DLP]]
!!Chip Naming Confusion, Descriptions of MicroMirror Architectures
> DLP is a quickly maturing technology, but Texas Instruments has sown the seeds of confusion by changing the names of the chips at the heart of all DLP displays. The generation after the HD2+ (1,280 by 720) was originally called the HD3, but TI then dropped the HD nomenclature altogether and began calling the new chip the 720p. (They also have a 1,920-by-1,080 chip called the 1080p, which was originally called the xHD3. Interestingly, that chip has only 960 mirrors in the horizontal dimension, and each one forms the image for two adjacent pixels,which totals to 1,920 by 1,080 pixels on the screen. The 720p has a full complement of 1,280 by 720 mirrors.) Not only that, these chips are available with one of two sets of image-enhancing technologies, either DarkChip2 or DarkChip3. Whereas the 7205 used the HD2+ chip with DarkChip2, the 7210 uses the 720p chip with DarkChip3. Among the differences between the HD2+ and 720p chips is reduction in space between the mirrors, which provides even more controllable surface area to reflect the light. Also, each mirror's "dimple" has been reduced even further, which means that each mirror can individually reflect more light. Lastly, there is a new light-absorbing coating underneath the mirrors. This should all lead to a better black level, more light output, and, therefore, a better contrast ratio. - ReF11
!!DMD = Digital Micromirror Device
A device which modulates light digitally.
A rectangular array of up to 1.3 Million digitally controlled mirrors.
Also called a Spatial Light Modulator or Optical Modulator
!!Term Usage
Single 0.95″ 1080p DMD DLP Chipset
Single 0.55” DDR DMD DLP
See [[Discovery1100]], [[Discovery3000]]
!!!DMD Comparison - Compare 0.7 XGA DDR to the 0.7 XGA LVDS
|!| !0.7 XGA DDR | !0.7 XGA LVDS |
|Mirror Format | 1024 x 768 | 1024 x 768 |
|Mirror Pitch | 13.68 um | 13.68 um |
|Mirror Blocks | 16 | 16 |
|Reset + Settle Time | <15us | <15us |
|Clock Rate | 60 ~MHz DDR | 200 ~MHz DDR |
|Data Lines | 64 | 32 pairs |
|Data Transfer | 7.7 Gbs | 12.8 Gbs |
|Binary Frames/sec | 9,800 | 16,300 |
|Row Address | Shift register | Random address|
|Package Size (inch.) | 1.6 x 1.25 | 1.6 x 1.25 |
* DarkChip is an evolution of DLP.
* At this time there is mention of ~DarkChip2, ~DarkChip3, ~DarkChip4 (latest)
* http://www.engadgethd.com/2007/09/06/ti-produces-darkchip-4-dlp-chipset/
!!Term usage
0.7-inch DarkChip3 DLP chipset
Single 0.62″ DarkChip2™ DLP (Native 720p (1280x720))
0.65” DarkChip2™ DLP® (Native WXGA (1280 x 768))
Single 0.65” DarkChip3™ DLP® (XGA (1280 x 768))
Single 0.95” DarkChip3 LVDS DMD = 1080p DarkChip3 DMD DLP technology (Native 1080p (1920 x 1080))
0.80” DarkChip3™ DLP® (720p Native (1280 x 720))
DarkChip3 0.80” DLP = 720p DarkChip3 DLP technology (720p Native (1280 x 720))
0.7", 1-Chip DMD, 12 deg. LVDS, DarkChip3™ with DDP3020 (Native Resolution 1024 x 768)
!!~DarkChip2 vs.~DarkChip3
>The ~InFocus ~IN72 Texas Instruments high definition (720p) .55” 480p DarkChip 2 DMD chip is an excellent microdisplay chip but does have a higher specification sibling, the DarkChip3. The DarkChip3 has flatter mirrors with superior reflective properties and reduced inter-pixel spacings (better “fill factor”). Although the DarkChip 2 is a “budget” projector choice it does support Texas Instruments Brilliant Color technology. Brilliant Color was designed to compensate for loss of color saturation when a white segment is added to the color wheel which in not the situation with the ~IN76. ~InFocus is targeting the home entertainment market where deeper blacks are more important than extra brightness is in the business world. - ReF10
!!~DarkChip4
>New Darkchip™ 4 technology, available in 2008, is reported to deliver 30% or more increase in native contrast ratio depending upon the application. The higher the contrast ratio, the greater the definition in the image. - ReF9
<<tabs "dashboardtabs" [[Overview ]] "Project Overview" [[Overview]] [[Highlights ]] "Information you Must-See" [[HighLights]] [[New Information]] "New additions to this wiki" [[NewInformation]] [[Questions]] "View questions posed to the group." [[Questions]] [[Member Comments]] "View comments and opinions" [[MemberComments]] [[Suggestions]] "View suggestions" [[Suggestions]]>>
This DashBoard tiddler puts basic information together for quick introductions.
Type the text for 'New Tiddler'
!!Texas Instruments Chipset
The [[DMD]] Discovery 1100 Chip Set features the DMD and other support devices. Unlike TI DMD controllers optimized for projection display, Discovery 1100 is designed to support a wide variety of DMD applications by delivering maximum flexibility in formatting and sequencing data and resulting light patterns. - ReF8
* 0.7 XGA DDR DMD
** 0.7 XGA DDR DMD (1024 x 768 mirrors)
** 13.68um x 13.68um mirror pixels o +/- 12º mirror tilt
** 85% optical fill factor
** Capable of switching > 40,000 times/sec
** High speed port supports up to 9,800 full array
** mirror patterns/sec (7.7 Gbs)
** USB port supports up to 100 full array mirror pattern/sec
** Chipset available to support custom applications
** Available in Visible, Ultraviolet and Near Infrared
* DAD 1000 controls of 16 banks of DMD mirrors
* Discovery 1100 DRC (DAD Reset Controller) provides user interface to DAD 1000 with overlapping mirror bank reset capability
* Discovery 1100 HSC (High Speed Controller) provides DMD data load command interface, supporting 7.7 gigabits/sec DMD data load
* Discovery 1100 USBIFC (USB Interface Controller) provides seamless interface between USB and DLP components, supporting up to 80 megabit/sec DMD data load
* Cypress ~FX2 (purchased separately) provides USB 2.0 system interface.
see also:
* 2503686.pdf
* ~Discovery_ChipSet_Sheet.pdf
* ~DiscoveryStarterKit.pdf
* DMDComparison
!!Links
http://focus.ti.com/docs/toolsw/folders/print/dmd-discovery-1100-chipset.html
http://focus.ti.com/dlpdmd/docs/dlpdmdhomepage.tsp?familyId=767&contentType=15
Discovery 3000 chip set - latest DMD
possibly DDP3000
!!Texas Instruments Chipset
The [[DMD]] Discovery 3000 Chip Set features the DMD and other support devices. Unlike TI DMD controllers optimized for projection display, Discovery 3000 is designed to support a wide variety of DMD applications by delivering maximum flexibility in formatting and sequencing data and resulting light patterns. - ReF7
* 0.7XGA [[LVDS]] DMD
** 0.7 XGA LVDS DMD (1024 x 768 mirrors)
*** 13.68um x 13.68um mirror pixels
*** +/- 12º mirror tilt
*** Up to 16,300 full array mirror patterns/sec (12.8 Gbs)
*** 200 ~MHz LVDS clock rate
*** 85% optical fill factor
*** Chipset available to support custom applications
* DAD 1000 DMD Power and Reset Driver
** Reset control of 16 banks of DMD mirrors
* DDC3000 Digital Controller
** Provides high speed LVDS data and control interface for user interface to the DMD and provides mirror reset and timing information to the DAD1000
** Supports random row addressing
see also:
* 2506779A.pdf
* ~Discovery_3000_Sheet.pdf
* DMDComparison
!!Links
http://focus.ti.com/dlpdmd/docs/dlpdmdhomepage.tsp?familyId=767&contentType=15
* http://www.orangevillecameraclub.ca/projector/docs/119_Intro_Digital_Light_Processing.pdf
* http://www.orangevillecameraclub.ca/projector/docs/135_Myth.pdf
* http://www.orangevillecameraclub.ca/projector/docs/141_hornbeck.pdf
* http://www.orangevillecameraclub.ca/projector/docs/144_yoder.pdf
* http://www.orangevillecameraclub.ca/projector/docs/153_Reliability_paper.pdf
* http://www.orangevillecameraclub.ca/projector/docs/154_Hinge_Memory_Paper_IRPS2002.pdf
* http://www.orangevillecameraclub.ca/projector/docs/155_IRPS2003_DMDHingeMemoryLifetime_Sontheimer_Mehrl_5C3.PDF
* http://www.orangevillecameraclub.ca/projector/docs/156_Picture_Reliability_Study_Phase_II_White_Paper.pdf
* http://www.orangevillecameraclub.ca/projector/docs/166_History_Electronic_Proj_Tech_Hornbeck.pdf
* http://www.orangevillecameraclub.ca/projector/docs/168_BrilliantColor_white_paper.pdf
* http://www.orangevillecameraclub.ca/projector/docs/172_3077673CRT-002B.pdf
* http://www.orangevillecameraclub.ca/projector/docs/projector_guide.pdf
!Optoma ~EP1690
|Latest opinion | "its bright, high resolution, a nice projector, but I (Jan) don't think it is what we want for the club. see MemberComments (Oct.6) |
Some may recognize this model number as the projector used at our first general members meeting in September (courtesy of [[JK]]). This projector did a very good job and I feel it is a good place to work from in our selection process.
Listed here are some contributions pertaining to this projector.
* LumensAndColorTemperature
'Out of the box, the Color Temperature control was not properly calibrated. Settings 1 and 3 were identical and measured around 5500K, which is generally too warm for data/graphics display. Setting 2 was slightly colder, but did not correspond with 6500K, which would be ideal for digital photography and video use. However, you can adjust each of these settings to your taste and save your adjustments. Once you do so, you can switch between them at will for use with data, color photography, video gaming, or video.'
>Out of the box colour temperature of 5500K is pretty good for digital images and might require a bit of tweaking only. ...I'm still searching for a way to improve saturation if it's possible. Contributed by [[JK]]
If that same projector (EP1690) is DLP, it will have problems with reds looking muddy and yellows having a green tinge even at these reduced brightness settings (with the exception, apparently, of the Dell2400MP and the InFocus IN26). Now I’m thinking maybe the Dell looks pretty good...
>“In the case of the Optoma EP1690, it performed fairly well, considering. In Bright mode, with lamp on full, Optoma claims 2500 lumens. Our measurements produced a lumen measurement of 1922 lumens - about 77% of claimed performance, and in that regard, typical. For this measurement, the Color Temp setting was 1, there was no difference in brightness regardless of which gamma mode was selected (film, video, graphics, PC). Switching to ECO (low) power mode, which dims the lamp, the brightness dropped to 1476 lumens, a drop of about 23% which is also very typical. The color temperature in this brightest mode produced a reading of 7642K (and 7839K in Eco-mode). This is cooler than used for movie watching, and 8000 is the general area where most business projectors measure, as the projector lamps used today are cool - more bluish, less red content. Thus, around this color temperature (or slightly higher) is where a normal business projector will produce its brightest readings, and will perform as expected for Powerpoint presentation, spreadsheets, etc. Switching out of Bright mode, into Cinema mode where a home theater user is likely to be, drops lumens significantly as expected. With color temp set to 0, we got a measurement of 7588K, still too cool for proper movie watching, but we recorded an impressive 1029 lumens. At that point the projector was calibrated for video - targeting 6500K. Interestingly the lumen rating after all of this, was 513 lumens - almost identical to Optoma's HD72, one of our Hot Product Award winning home theater projectors, (same box, same lens, etc.) Translated, in its best possible setup for movie watching the brightness of the EP1690 is not any brighter than the HD72, but if you really need plenty of extra lumens to fight ambient light, the EP1690 has the extra horsepower to make a real difference in your room. “ Contributed by ([[CB]])
!!Favorite Model Links (no particular order)
|>| !Local Information Source |>|>|>| !Internet Projector Information Sources |
| !Projector Model | !Projector Wiki Info | !Manufacturers Info | !Link1 | !Link2 | !Link3 |
| Optoma ~EP1690 | EP1690 | [[Optoma1690|http://www.optoma.ca/Product_detail.asp?product_id=277]] | [[ProjectorCentral|http://projectorcentral.com:80/optoma_ep1690.htm]] | | |
| ~BenQ ~SP831 | BenQSP831 | [[BenQSP831|http://www.benq.ca/products/Projector/?product=733]] | [[CNet|http://asia.cnet.com/reviews/home_av/projectors/0,39037571,40810906p-0,00.htm]] | | |
| Mitsubishi XD460U | | [[Mitsubishi|http://www.mitsubishi-presentations.com/products/projectors/XD460U.html]] | | | |
/%
| | | | | | |
%/
''In anticipation of meeting to make a final selection I wish to offer the following suggestions:''
* LCD projectors will be dropped from consideration in favor of DLP.
* Target Specs (or better) for the projector will remain as posted on the Wiki.
* Our budget is basically $1500, but $500 may be available for the right projector.
* Craig and I offer the following models for consideration: (Note: the links below are to pdf information packages compiled by Craig, as an aid to our selection)
**[[Optoma1690 (view package-6Mb)|http://www.orangevillecameraclub.ca/projector/docs/Optoma EP1690.pdf]] ~$1000
**[[BenQSP831 (view package-5Mb)|http://www.orangevillecameraclub.ca/projector/docs/BenQ SP831.pdf]] ~$1700
**[[Mitsubishi XD460U (view package-3Mb)|http://www.orangevillecameraclub.ca/projector/docs/Mitsubishi XD460U.pdf]] ~1800
* This is our "short list" at this time. If any of the committee members have models to include for the final selection please advise Mike K. prior to the meeting, such that information will be present at the discussion.
* Furthermore if there is any objections to any of the statements above please advise Mike K.
!! See the member responses to the above comments
* [[Responses|http://www.orangevillecameraclub.ca/projector/OCCProjector.html#MemberComments]]
''~HighLights''
|[[Excellent Article: Projectors for Photographers|http://www.projectorpeople.com/resources/photography-projection.asp]] - (The Projector People) |
|~|!Recommendations as follows: |
|~|2200 - 3500 lumens |
|~|contrast ratio of at least 400:1|
|~|XGA (1024 x 768 pixels) |
|~|4:3 aspect ratio |
|~|and lots more... |
|>|[[A Flash Presentation LCD vs DLP from Toshiba - Toshiba compares LCD & DLP|http://www.hitachi.us/supportingdocs/forhome/DisplayTechnologiesGroup/3lcd/index.html]] |
* [[What is a Wiki?]]
* ViewingContent of this Wiki
* [[Where is the Content?]]
* PageOrganization
* [[What is a "Tiddler"?]]
* TiddlerOrganization
''Note'' - Members interested in the workings of this Wiki are encouraged to contact Mike K.
* Projected image quality is largely dependent upon many other factors beyond the technology incorporated into the projector itself. Screen type, distance from projector to screen (ThrowDistance) and, ambient light levels.
* Effective life of the bulb is about 1/2 the life expectancy rating
* If you take a 2500 lumen projector and set it to video mode and tune to 6500 colour temp (to get shadow detail and correct gamma), the effective lumen value can be reduced to 500-900! ([[CB]])
* DLP Products have the added advantage that the optics for reproducing the image are encased in a sealed, airtight environment shielded from dust and the elements. By protecting the optics and avoiding the need for a replaceable filter system, DLP products require less regular maintenance and provide a more attractive total cost of ownership – an important concern for all projector owners. ([[MK]] Is this true?) - ReF1
''Q'' How do you calibrate the color of a Digital Projector? Is there a "Spider" for projection?
>The scaler is what does the video processing of the signals coming from the DVD player, TV antenna, cable, VCR, game console, etc. The scaler is forgotten all too often in favor of luminosity or contrast, which can be a serious error. In fact, the scaler determines the quality of the projected image. Even with very good colorimetry, contrast, luminosity and noise characteristics, a projector can be catastrophic if its internal scaler is poor. Solarization, "dolly" effects, blurred contours, shadows around objects and people, jerky movement, stuttering on very rapid movements, trembling in light-colored image areas and motion sparkle can be the result and make movie-watching a painful experience. - ReF6
!JK = Jan
contributed by Jan
!!LCD = Liquid Crystal Display
In Liquid Crystal Display projectors, a light source typically shines through a layer of liquid crystal material. Because the light is transmitted through the layer, this form of projection technology is commonly labeled transmissive.
LCDvsDLP
!!Articles
http://en.wikipedia.org/wiki/LCD_projector
http://en.wikipedia.org/wiki/Liquid_crystal_display
[[LCD Technology - Christie's Guide to Digital Projector Basics|LCD Technology - Christie's Guide to Digital Projector Basics]]
[[3LCD - The Structure of Optical Components|http://www.3lcd.com/structure_close_up.html]]
!!Movie
[[LCD Projectors|http://www.christiedigital.com/AMEN/TechnologyMovies/technologyExplained/LCDTechnologyExplained.htm]]
[[3LCD How are bright images made?|http://www.3lcd.com/eg/pup_3_e.html]]
[[LCD Technology Explained - Christie|http://www.christiedigital.com/AMEN/TechnologyMovies/technologyExplained/LCDTechnologyExplained.htm]]
!!Resources
http://www.3lcd.com/index.html
!!LCD Technology Information
* http://www.epson.co.jp/e/newsroom/2006/news_20061212_2.htm
In Liquid Crystal Display projectors, a light source typically shines through a layer of liquid crystal material. Because the light is transmitted through the layer, this form of projection technology is commonly labeled transmissive.
LCD projectors range from mid-sized to very small, medium weight (20 kilos or so) to very light (under 3 kilos), and have become increasingly standardized (and hence easy to set up and use), making them the most popular choice for a wide variety of presentation applications.
In LCD projectors, a light source typically shines through a layer of liquid crystal material. Because the light is transmitted through the layer, this form of projection technology is commonly labeled transmissive. An electrical charge is applied to the crystals in the layer, causing them to rotate the plane of polarized light - in effect, turning different colors on or off. Each pixel (colour dot) projected to a screen is generated by three separate crystal cells, one each to produce red, green and blue color signals. The polarized light coming out of the layers passes through a prism to create the unified projected image your audience sees.
The performance of the projector is determined by a variety of components, most significantly the quality of the transistor layer that controls the liquid crystals. Newer projectors use polysilicon transistors - which are smaller, absorb less light (making the projected image brighter) and switch faster than earlier generations - and have three separate layers to produce the colour signals going into the projection prism.
[img[LCD Projectors|http://www.3lcd.com/images/project/system_e.gif]]
In the context of alternative technologies of the same basic size and weight, LCD projectors have the advantage of being the more-established technology, which means the installed base is larger, and hence more people are experienced in setting up and using this form of presentation support.
LCoS Technology:
Liquid Crystal on Silicon - a hybrid technology in which the light is reflected off modified LCD panels to offer some of the benefits of DLP particularly at higher contrast levels and a higher "perceived" resolution because of the smoothness of the image. LCoS has yet to gain the market acceptance of DLP or LCD, but it is very well suited to presentation applications that show fine detail or graphics and require higher projected resolutions.
Source: [[LCD Technology : Christie's Guide to Digital Projector Basics|http://www.christiedigital.com/AMEN/TechnologyExplained/TheProjector/ProjectorBasics/LCDTechnology.htm]]
* look for LCD vs DLP articles at the bottom of this tiddler
| !LCD | !DLP |
|No rainbow effect |Rainbow effect experienced by small proportion of users. Virtually eliminated if the projector features a 4 x speed or greater colour wheel. |
|Slightly more saturated "truer" colours |Less saturated colours, but improving significantly, especially with the introduction of 8 segment colour wheels |
|Contrast ratios up to 10000:1 |Contrast ratios up to 5000:1 |
|Small gap between pixels, resulting in slight 'screen door' or 'chicken wire' effect. |Much smaller gap between pixels, resulting in smoother overall image |
|Small possibility of 'dead' pixels |Dead pixels virtually non-existent |
|>|>|>|>| !Data from [[Projectors for Photographers|http://www.projectorpeople.com/resources/photography-projection.asp]] |
| !Technology | !DLP® | !3LCD® | !Advantage? | !Comments |
|Color accuracy |Some issues producing accurate yellow (shows green), red, and skin tones. Colors are more dramatic. |Known for accurate color and flexibility in color correction. |3LCD® technology offers more true to life color than DLP® color, particularly in flesh tones, pastels, and yellow and green segments. However, some new DLP® projectors to be released in 2007 will include Brilliant Color™ technology for a significant improvement to color accuracy. Some home theater buyers prefer the richness of DLP® to the true color of LCD. | |
|Contrast ratio |Higher contrast ratios than LCD™ typically. Deeper blacks, rich and vibrant looking colors. Very popular in home theater applications because of the richness of the blacks. |Good contrast ratios, but blacks are not as black as DLP™ typically. Colors are more lifelike. Good at showing details in black and grey spaces. |Both 3LCD® and DLP® projectors offer adequate contrast ratios, but DLP® projectors produce deeper black segments and will spec higher contrast ratios. | |
|Image Artifacts |Some experience what is called the "RainbowEffect" which is visible rainbows in moving scenes or when turning away from the screen quickly. |The "ScreenDoorEffect" is visible space between pixels on the projected image. This typically happens when a large image is viewed from a short distance. If you are projecting smaller images, and sitting a foot or two from the screen, this will most likely be unnoticeable. Also, many LCD™ projectors include a filter that minimizes this effect. Some artifacts may be visible during motion video on some projectors, particularly on projectors not designed for home theater use. |If you don't see the RainbowEffect (and most people can't) then DLP® projectors will have fewer visible artifacts than 3LCD®, however, there have been numerous improvements to minimize the 'ScreenDoorEffect'. At the recommended distance from the screen, both LCD® and DLP® projectors produce great looking images. | |
| | | | | |
!Articles about LCD vs DLP
* http://www.projectorreviews.com/advice/dlpvslcd/index.asp
* http://www.projectorreviews.com/advice/dlpvslcd/portable_projectors.asp
* http://www.projectorreviews.com/advice/hometheater/dlpvslcdhome.asp
!Movies about LCD vs DLP
* [[Toshiba compares LCD & DLP|http://www.hitachi.us/supportingdocs/forhome/DisplayTechnologiesGroup/3lcd/index.html]]
!!LCOS = Liquid Crystal On Silicon
Liquid Crystal on Silicon - a hybrid technology in which the light is reflected off modified LCD panels to offer some of the benefits of DLP particularly at higher contrast levels and a higher "perceived" resolution because of the smoothness of the image. LCoS has yet to gain the market acceptance of DLP or LCD, but it is very well suited to presentation applications that show fine detail or graphics and require higher projected resolutions.
!!Articles
http://en.wikipedia.org/wiki/LCOS
[[LCD Technology - Christie's Guide to Digital Projector Basics|LCD Technology - Christie's Guide to Digital Projector Basics]]
!!LVDS = Low Voltage Differential Signaling
http://en.wikipedia.org/wiki/Low_voltage_differential_signaling
[[Brightness]] rated in [[Lumen]]s an ANSI standard
Important factors:
* light disperses over distance
* ambient room light affects projection quality, reduces contrast
* types of lamps involved UHP, UHE, metal halide or halogen
* projectors of similar Lumen ratings perform differently
* bulbs dim with age
* keep a spare bulb on hand
| !Summary of Lumen Requirements |>|
| !Lumens | !Situation |
|1,000 minimum |general speaking |
|~|lights up |
|~|small room |
|2,000 or higher |desirable for small presentations |
|3,500 & up |is a good threshold for larger rooms |
|~|or |
|~|if you're projecting visuals where fine detail is involved |
!!Articles
http://www.projectorpeople.com/resources/lumen-guide.asp
[[Lumens - Christie's Guide to Digital Projector Basics|Lumens - Christie's Guide to Digital Projector Basics]]
Different lamps play a role on light output. Halogen lamps appear dimmer than another metal-halide, even if the two units have the same ANSI lumen rating. Type of LCD technology (active matrix TFT, ~Poly-Si, passive), type of overall technology (LCD vs. DLP vs. CRT), contrast ratios, among other factors can also affect the end result.
http://en.wikipedia.org/wiki/Lumen_%28unit%29
Brightness is the other significant component in the quality equation. Light disperses over distance: The farther your projector will be from the screen, and the larger the image you are trying to project, the brighter the projector you'll want to be using.
The ideal is a projector bright enough to throw visuals that are sharp and easy to see in normal ambient lighting conditions - in other words, your audience can see your visuals without having to have the lights turned down to improve brightness and contrast.
ANSI lumens provide a common scale for determining a projector's brightness. Generally speaking, 1,000 lumens is a minimum for leaving the lights up in a small meeting room - but 2,000 or higher is desirable in smaller presentation venues, and 3,500 and up is a good threshold for larger rooms, or if you're projecting visuals where fine detail is involved.
Don't rely solely on the lumens rating in specifying a projector. The same image projected from two projectors with the same lumens rating can appear markedly different depending on the type of lamp involved (UHP, UHE, metal halide or halogen). Projection lamps dim with age, so brightness declines over the life of the bulb. At 1,000 hours, a lamp rated for 2,000 hours of use might be projecting an image about half as bright as when it was new. At 2,000 hours, newer evolutions of the technology (UHP and UHE) will still retain about 80 percent of their brightness.
TRADE SECRET:
Many projectors have a "life" counter in their Setup menu that will tell you how many operating hours are on the bulb currently in use. While you're checking that, make sure there's a spare lamp available in case something unforeseen happens to the current occupant of the bulb socket during your presentation.
Source: [[Lumens : Christie's Guide to Digital Projector Basics|http://www.christiedigital.com/AMEN/TechnologyExplained/TheProjector/ProjectorBasics/Lumens.htm]]
If you take a 2500 lumen projector and set it to video mode and tune to 6500 colour temp (to get shadow detail and correct gamma), the effective lumen value can be reduced to 500-900!
>“In the case of the Optoma EP1690, it performed fairly well, considering. In Bright mode, with lamp on full, Optoma claims 2500 lumens. Our measurements produced a lumen measurement of 1922 lumens - about 77% of claimed performance, and in that regard, typical. For this measurement, the Color Temp setting was 1, there was no difference in brightness regardless of which gamma mode was selected (film, video, graphics, PC). Switching to ECO (low) power mode, which dims the lamp, the brightness dropped to 1476 lumens, a drop of about 23% which is also very typical. The color temperature in this brightest mode produced a reading of 7642K (and 7839K in Eco-mode). This is cooler than used for movie watching, and 8000 is the general area where most business projectors measure, as the projector lamps used today are cool - more bluish, less red content. Thus, around this color temperature (or slightly higher) is where a normal business projector will produce its brightest readings, and will perform as expected for Powerpoint presentation, spreadsheets, etc. Switching out of Bright mode, into Cinema mode where a home theater user is likely to be, drops lumens significantly as expected. With color temp set to 0, we got a measurement of 7588K, still too cool for proper movie watching, but we recorded an impressive 1029 lumens. At that point the projector was calibrated for video - targeting 6500K. Interestingly the lumen rating after all of this, was 513 lumens - almost identical to Optoma's HD72, one of our Hot Product Award winning home theater projectors, (same box, same lens, etc.) Translated, in its best possible setup for movie watching the brightness of the EP1690 is not any brighter than the HD72, but if you really need plenty of extra lumens to fight ambient light, the EP1690 has the extra horsepower to make a real difference in your room. “
* Contributed by ([[CB]])
!MK = Mike
contributed by Mike
!!Menu
@@font-size:14pt;''FinalSelection''@@
----
[[Overview]]
[[New!|NewInformation]]
HighLights
ClubTargetSpecs
ProjectorShootout
<<slider chkTechnology [[Technology]] "Technology »»" "click to view Technology links">>
<<slider chkShopping [[Shopping]] "Shopping »»" "click to view Shopping links">>
<<slider chkGroup [[ProjectorGroup]] "Projector Group »»" "click to view Projector Group links">>
[[Calculators & Tools]]
TableofContents
[[Documents]]
[[References]]
----
[[How to use this Wiki?]]
[[Help]]
[[RSS]]
----
<<slider chkWikiAdmin [[WikiAdmin]] "Wiki Admin »" "click to view Wiki Administration links">>
* [[3M|http://solutions.3m.com/wps/portal/3M/en_US/Meetings/Home/Solutions/Product_Catalog/Digital_Projectors/]]
* [[ASK Proxima|http://www.askproxima.com/products/projectors/index.htm]]
* [[Barco - Event Projectors|http://www.barco.com/corporate/en/products/category.asp?catid=12]], [[Barco - Training Projector|http://www.barco.com/corporate/en/products/category.asp?catid=16]]
* [[BenQ|http://www.benq.ca/products/Projector/]]
* [[Canon|http://www.canon.ca/english/index-products.asp?lng=en&gid=2&sgid=19]]
* [[Christie - Business Projectors|http://www.christiedigital.com/AMEN/Markets/BusinessPresentations/]]
* [[Dell|http://accessories.dell.com/sna/category.aspx?c=ca&category_id=5188&cs=cadhs1&l=en&s=dhs]]
* [[Digital Projection International|http://www.digitalprojection.com/]]
* [[EIKI|http://www.eiki.com/]]
* [[Epson|http://www.epson.ca/cgi-bin/ceStore/hubProjectors.jsp?BV_UseBVCookie=yes&oid=0]]
* --Hewlett Packard-- - no longer seem to offer any projectors
* [[Hitachi|http://www.hitachi.ca/Apps/hitachicanada/content.jsp?page=forbus/products/lcdprojectors/index.html&path=jsp/hcl/hcl/en/]]
* [[InFocus|http://www.infocus.com/Segments/Business.aspx#group2]]
* [[JVC|http://www.jvc.ca/jvcpro//productlist.aspx?l=E&h=P2_200]]
* [[Lenovo|http://www.pc.ibm.com/ca/accessories/projectors/index.html]]
* [[Matsushita (Panasonic)|http://www.panasonic.ca/english/broadcast/presentation/projector/index.asp]]
* [[Mitsubishi|http://www.mitsubishi-presentations.com/]]
* [[NEC|http://www.necdisplay.com/Products/Class/?class=9731c5fd-2d71-4571-8925-ee9382741831]]
* [[Optoma|http://www.optoma.ca/]]
* [[Planar|http://www.planar.com/products/projectors/pr/]]
* [[Sharp|http://www.sharp.ca/products/index.asp?cat=26]]
* [[Sony|http://www.sonybiz.ca/solutions/CategoryDisplay.do?categoryId=43189]]
* [[DLP - Texas Instruments|http://www.dlp.com/default.aspx]] (component supplier of DLP technology)
* [[Toshiba|http://www.toshiba.ca/web/products.grp?lg=en§ion=1&group=11&subgrp=Multimedia%20Projectors#Multimedia%20Projectors&fm=top]]
* [[Viewsonic|http://www.viewsonic.com/products/projectors/]]
* [[Yamaha|http://www.yamaha.ca/av/Video_Display_products.jsp]]
* Ohh! ... Just give me [[Google|http://www.google.ca/]], I'll find it myself!
MediaWiki is a Wiki system used by Wikipedia. It requires a server to run and cannot run standalone like TiddlyWiki.
*http://www.mediawiki.org/wiki/Manual:Contents
*[[FAQ site at:|http://www.mediawiki.org/wiki/Manual:FAQ]]
*[[MediaWiki Help - Contents|http://www.mediawiki.org/wiki/Help:Contents]]
!Projector Group Meeting: <br>Date: Sunday November 4, 2007, @ 1:30PM <br> Location: The Coffee House, Orangeville
''Projector Group Meeting Planner - member availability''
| !Member<br>Name | !Sun<br>Nov4 |
|~|~|~|
| CB | yes |
| DG | no |
| JK | maybe |
| MK | yes |
| SN | yes |
| MY | |
| SG | yes |
''Member Comments''
!!Nov.1 /07
>A partial response to Jans comments about the Mitsubishi ~XD460U seeming to be of lower quality:
>The ~XD460U is actually the only projector of the three which uses DarkChip3 (the others use DarkChip2). This is latest generation of DMD chips released by Texas Inst. (DarkChip4 is not yet released) This may not be apparent in the information packages provided.
>Also Pricing sources suggest ~Optoma1690 ~$1000, ~BenQSP831 ~$1700, Mitsubishi ~XD460U ~1800 - [[MK]]
!!Nov.1 /07
>The Benq looks the best and Direct Dial seems to have it for $2050.
>The Mitsubishi looks similar if not lower in quality than the Optoma which is cheaper, so I'd go for it.
>In other words, my first choice is the ~BenQSP831 if we can afford it: http://www.directdial.com/ca/shop/item/prod.asp?item=SP831
>My second choice is the OPTOMA 1690: http://www.directdial.com/EP1690.html
>I would say the Mitsubishi is out of the running (price, quality) but I don't know the arguments here: http://www.directdial.com/ca/shop/item/prod.asp?item=XD460U
>Anyone have experience with any Benq or Mitsubishi models? - [[JK]]
!!Oct.26 /07
>I think your reasoning for model targeting is sound. (see Oct24 /07 - [[CB]])
>In many ways I think still photos may be a more demanding test of true image quality.
>
>I like the sound of the BenQSP831. I have looked briefly at it before, but I have been unable to verify the DMD chip used beyond, 0.7" and WXGA. A 6 color wheel sound good too.
>
>I have noticed that despite a Texas Instrument bulletin claiming there are many projectors employing BrilliantColor (~BenQ, Mitsubishi, NEC, Optoma, Sharp, Toshiba), only Optoma has a consistent (almost every model) use of the technology. Many of the manufacturers mentioned have very few (like one). Probably ~BenQ is one who has more models than most. This is why I am wondering if BrilliantColor is rolled into DarkChip and merely takes a back seat to other "hype". (now verified)
>
>Some comments from Pete's contact (T.Walker), "DLP is meant for moving pictures rather than still" and "colors will actually fade in and out over time (I took this as the time for normal viewing of an image)"
>
>Some general comments of my own:
>To date I am unimpressed with any LCD projectors we have seen. However in my mind, looking at the physics of the two technologies the LCD should be the choice for sharpness, color, contrast, etc.. Basically for photography it should be better. I don't know how to encourage the LCD side of the argument when there are no good examples. I feel strongly that our final choice will probably be a DLP projector. Furthermore as a club we should still encourage slide photography, no matter how hopeless, as it still beats both technologies hands down.
>
>As for why the price dropped on the BenQSP831. I believe that the market nitch we represent is the smallest possible. I believe the manufacturers know that the big money is all in home cinema and other cinema presentations. When was the last time your family all got together to look at photographs. If you did it was probably on the computer. Consider a still framed presentation vs a "Flash" or full motion presentation. Which is more attractive these days. With computers boring slide presentations are unnecessary. I am sure we are considered a no-profit market. Also there are a good number of projectors already using the next high generation of Darkchips (I believe, I can't verify this) and this may be justifying the restructuring of pricing. - [[MK]]
!!Oct.24 /07
>With some of the feedback we got at the last meeting (including the back-channel messages about a potentially larger budget than we had initially assumed), I thought I would try a different approach to searching out projector candidates. The two key criteria I used were: 1) The club seemed to prefer the picture quality of the DLP, and 2) The true budget might be closer to $2000 than the $1000 we had initially assumed. Armed with these new criteria, I went to the manufacturer’s sites for ~BenQ, Infocus, Mitsubishi, NEC, Optoma and Viewsonic to look at their higher-end DLP products. And I discovered something interesting. The very top end of all of these manufacturer’s lines are aimed at home theatre; high-contrast, low lumens, and **this is the important bit** a great deal of internal technology aimed at providing better video – not photos, but moving pictures. Most have very expensive “Hollywood Cinema” video processors in addition to the more normal projector workings. Making the assumption that the club is less interested in video, more interested in still picture projection, I moved down the manufacturer’s lists. The next category below home theatre is the “hybrid” machine - one that can be either a business projector or a home video projector. These tended to be positioned in their product line as the very best business machine that could be used for home video, but without all the expensive video signal processing. There were only three that I found in this category. All were priced in the $3500 - $4000 range except one. The BenQSP831 was introduced Fall 2006 at $3700 but I see it priced at $1700 -$1800 on the web. It is 4000 lumen, DLP, BrilliantColour (the latest 2030 TI chip) Hue/Sat adjustments on 6 colours, six colour wheel and WXGA resolution. Manufacturer’s product page here, CNET review here and Engadget here. -[[CB]]
!!Oct.19/07 - [[SG]]
* part of the costs should be allocated to a robust carrying case for the projector.
!!What is Micro Content?
It is a small piece of instance linked content. It is dependent upon software to allow the application of links to individual words or terms. Words or terms, within texts can be linked to related content. Such words or terms are generally called WikiWords. WikiWords link content with other content. The prevailing use of WikiWords within [[Wiki]]s is to maximize the use of small content blocks (Micro Content) to form a larger content.
[[Wiki]]s allow the reader the option of investigating added Micro Content.
''New Information''
Listed here are recent additions to the Projector Wiki:
!!Articles
* [[Which Projector Should I Buy?|http://www.popphoto.com/cameraaccessories/4464/which-projector-should-i-buy.html]] - (~PopPhoto.com)
!!Reviews
* http://www.presentationtek.com
* http://www.retrevo.com/samples/Benq-Projector.html
>This is a link to a site that crawls the web for appropriate content and lets you search by manufacturer and model. The link is currently set to ~BenQ. To select a new manufacturer, just click the letter in the left pane (like “E” for Epson) then scroll down the list that comes up in the main pane to find “Epson Projector Reviews”. Click on this to get a list of all Epson projectors. Click on the projector you want to know about and you are presented with a summary sorted into Professional Review & Articles, Forums & Blogs and Shopping Site Reviews. More detailed lists of each are available via the tabs along the top. - [[CB]]
!!Tiddlers
DDP2000
DDP2230
DDP3020
[[Discovery1100]]
[[Discovery3000]]
ProjectorForums
BrilliantColorProjectors
TradeMarks
DarkChip
PolySiliconTFT
InternalScaler
[[Components]]
DMDComparison
!!Links
* [[Yamaha|http://www.yamaha.ca/av/Video_Display_products.jsp]]
|''Type:''|file|
|''URL:''|file://F:\My%20Documents\Files_TiddlyWiki\OCCWebsite\OCCWebsite.html|
|''Workspace:''|OCCWebsiteTiddlyWiki|
This tiddler was automatically created to record the details of this server
![[The Orangeville Camera Club (OCC)|http://www.orangevillecameraclub.ca/]]
... is a friendly club based in Orangeville, Ontario dedicated to fostering great photography. - [[Club Website|http://www.orangevillecameraclub.ca/]]
{{borderless{
|''Overview'' |~|
|The purpose of this wiki is to explore Digital Projectors in anticipation of our upcoming club purchase. | @@font-size:14pt;The Orangeville Camera Club (OCC)@@ |
|Members with information about projectors (opinions, specs, reviews, past experiences) are encourage to contact Mike K. for incorporation to this Projector Wiki. | ... is a friendly club based in Orangeville, Ontario dedicated to fostering great photography. - [[Club Website|http://www.orangevillecameraclub.ca/]] |
|Our goal is to make the best educated purchase possible for the club. |~|
|[[How to use this Wiki?]] |~|
}}}
|>|>| !Main Page Title Bar |
| Main Menu | Main Content Area ([[Tiddler]]/s) | Search |
|~|~| Wiki Controls |
|~|~| Options |
|~|~| Wiki Admin |
||~| Timeline |
|~|~| Tags |
|~|~| More |
''The diagram above depicts the organization of this Wiki page.''
polysilicon thin-film-transistors (TFT’s)
* UnacceptableProjectors - Projectors which will not meet our needs
* AcceptableProjectors - (Jan's Projector)
* A comparison submitted by ([[CB]]) [[Projector Data Matrix|http://www.orangevillecameraclub.ca/projector/ProjectorData.html]] (a better effort to the table below)
* Craig's Comparison Table Updated ([[CB]]) [[Projector Data Matrix Oct.8/07|http://www.orangevillecameraclub.ca/projector/ProjectorDataOct8.html]]* ALL NEW! - Craig's Short List ([[CB]]) [[Projector Data Matrix Oct.8/07 - Short List|http://www.orangevillecameraclub.ca/projector/ProjectorDataOct8ShortList.html]]
!!Other Projectors Compared
|!Model | !System | !Resolution | !Pixel Number | !Brightness | !Cont. Ratio | !Aspect | !Bulb | !Throw Range |
|Epson Powerlite 822P | 3xLCD | XVGA | 1024 x 768 | 2600 L | 400:1 | 4:3 | 170W UHE ||
|Canon ~LV-2765 | LCD | XVGA | 1024 x 768 | 2500 L | 600:1 | 4:3 | 200W NSH ||
|Epson Powerlite 1700C | LCD/DLP | XVGA | 1024x768 | 2??? L | ???:1 | 4:3/16:9 | ???W ||
||||||||||
||||||||||
||||||||||
||||||||||
||||||||||
||||||||||
|model | LCD/DLP | XVGA | 1024x768 | 2??? L | ???:1 | 4:3/16:9 | ???W ||
http://www.focusedtechnology.com/lambyman.html
* http://www.avsforum.com/avs-vb/archive/index.php/f-68.html
- [[MemberComments]]
- [[Questions]]
- [[Suggestions]]
- MeetingPlanner
!!!Summary of shoot out:
* The Optoma EP1690 faired the best for sharpness, contrast, color and brightness. It also had several controls for adjusting the these.
* My least favorite was the Epson it presented with least brightness and contrast. Its output just seemed vague and fuzzy.
* The Dell did not seem to have the color adjustments our club would be looking for.
* The JVC it turns ou does not have a standard VGA input only S-Video. This yielded an output of very poor quality. This projector because of its S-Video inputs is not suitable for our needs.
|>|>|>|>|>|>|>|>|@@font-size:14pt;Projector candidates for the shootout:@@ |
|!Model | !System | !Resolution | !Pixel Number | !Brightness | !Cont. Ratio | !Aspect | !Bulb | !Throw Range | !Comments |
|Optoma EP1690 | 0.65" [[DDR]] DLP1 | WXGA | 1280 x 768 | 2500 | 2500:1 | 16:9 Native, 4:3 Compatible | 220W UHP | 5' - 40' | BrilliantColor(tm) |
|Dell1200MP | DLP1 | SVGA | 800 x 600 | 2000 | 2100:1 | 4:3 / 16:9 | 200W | 3.3' - 32.8' | |
|JVCDLA-RS1U | 3-chip D-ILA® | HD | 1920 x 1080 | 700 | 15000:1 | 16:9 | 200 W UHP | 5.90' - 40.02' | 2Year Warranty |
|Epson PowerLite675c | 3LCD | XGA | 1024 x 768 | 2500 | 400:1 | 4:3 | 170W UHE | 30" - 300" | |
|>|>|>|>|>|>|>|>|>|This Projector Shootout took place Tuesday October 16th, 2007 at the General Membership Meeting. |
!!Descriptions of Projector Specifications
* AspectRatio or [[ScreenRatio|AspectRatio]]
* AcousticNoise
* [[Bulbs]]
* [[Color]]
* [[Connection]]
* ContrastRatio
* LightOutput
* [[Resolution]]
* ThrowDistance
!!Technologies for Digital Projectors fall into the following types:
| !Principle Technologies | !Related Terms | !Universal Terms |
| [[DLP]]™ - Digital Light Processing | ColorWheel | LCDvsDLP<br>InternalScaler<br>AdjustableIris |
|~| BrilliantColor™ |~|
|~| DarkChip™ |~|
| [[LCD]] - Liquid Crystal Display | |~|
| [[LCoS]] - Liquid Crystal On Silicon | |~|
| [[D-ILA]] - Digital Direct Drive Image Light Amplifier | |~|
!!Links:
http://en.wikipedia.org/wiki/Projector
http://en.wikipedia.org/wiki/Video_projector
* [[Viewsonic PJ588D|http://www.viewsonic.com/products/projectors/pj588d/#specs]]
* [[Planar PR6020|http://www.planar.com/products/projectors/pr/pr6020/index.cfm]]
* [[Links to Projector Reviews - Texas Instruments|http://www.dlp.com/projectors/reviews.aspx]]
''Questions''
*What is your opinion of these projector models?
|>| !Local Information Source |>|>|>| !Internet Projector Information Sources |
| !Projector Model | !Projector Wiki Info | !Manufacturers Info | !Link1 | !Link2 | !Link3 |
| Optoma ~EP1690 | EP1690 | [[Optoma1690|http://www.optoma.ca/Product_detail.asp?product_id=277]] | [[ProjectorCentral|http://projectorcentral.com:80/optoma_ep1690.htm]] | | |
| ~BenQ ~MP622 | BenQMP622 | [[BenQMP622|http://www.benq.com/products/Projector/?product=1109]] | | |
| ~BenQ ~SP831 | BenQSP831 | [[BenQSP831|http://www.benq.ca/products/Projector/?product=733]] | [[CNet|http://asia.cnet.com/reviews/home_av/projectors/0,39037571,40810906p-0,00.htm]] | | |
| | | | | | |
/% Comments
*This tiddler will show questions directed to the whole Projector Group.
*Please review the question periodically and email in an opinion.
*If you have a question for the group please email it to Mike for posting.
!Questions for the Projector Group
%/
!Really Simple Syndication (RSS):
|!RSS|Really Simple Syndication ( [[RSS]] ) - [[RSS]] is a form of web publication which can be checked at regular intervals by a program ("feed reader" or an "aggregator") running on the users computer.|The ''"Beauty of [[RSS]]"''; turn-on your computer, work as normal, let your RSS Reader watch your favorite [[RSS]] Feeds. |
|~|This Wiki automatically generates an [[RSS]] Feed content for you to subscribe to.|~|
|~|Receive up-to-date information as it is posted. Program this link into your RSS Aggregation program: http://www.orangevillecameraclub.ca/projector/OCCProjector.xml|~|
!!RSS - What is it?
With the help of a small program running on a client (home computer) computer, users can receive news "feeds" regularly. [[RSS]] content can be read using software called a "feed reader" or an "aggregator." The user subscribes to a feed by entering the feed's link into the reader or by clicking an [[RSS]] icon in a browser that initiates the subscription process. The "feed reader" checks the user's subscribed feeds regularly for new content, downloading any updates that it finds.
[[RSS]] news "feeds" are simple text based web publications written in "XML" format and not susceptible to viruses, bandwidth, spam or "inbox" storage capacity problems. The user's "feed reader" reads the "XML publication at regular intervals and displays the information as text.
Most "feed readers" have the capability to detect new postings and can alert users with "new and breaking content". "Aggregators" reduce the time and effort needed to regularly check websites for updates, creating a unique information space or "personal newspaper."
!!RSS (Aggregators)
Most "aggregators" are Open Source and/or free programs:
* [[RSSReader|http://www.rssreader.com]]. . . . . . [[download RSSReader|http://www.rssreader.com/download/rssreader.exe]]
* ~RSSOwl
* Sharp Reader
* Bottom Feeder
* Online Versions like:
** ~Rogers-Yahoo
** Google Reader
!!Using RSS:
# Download and install ~RssReader.
# Subscribe to the RSS "feed"; use "http://www.orangevillecameraclub.ca/projector/OCCProjector.xml" to subscribe to the "feed" for this wiki.
This visual artifact is best described as brief flashes of perceived red, blue, and green "shadows" observed most often when the projected content features bright/white objects on a mostly dark/black background (the scrolling end credits of many movies are a common example). Some people perceive these rainbow artifacts all of the time, while others say they only see them when they let their eyes pan across the image. The effect is likely rooted in the concept of the flicker fusion threshold. In some viewers the effect can lead to eye strain, headaches, or migraines after as little as a few minutes of viewing.
The "rainbow effect" is unique to single-chip DLP projectors. As described above, only one color is actually displayed at any given moment. As the eye moves across the projected image, these separate colors become visible, resulting in a perceived "rainbow". The manufacturers of single-chip DLP projection systems have used color wheels rotating at higher speeds, or with more color segments, in order to minimize the appearance of the artifacts. These are referred to as 2x, 3x or 4x wheels. For example, a six segment wheel (RGBRGB) rotating at two revolutions per frame would be a 4x wheel.
Another way to reduce the rainbow effect is to replace a segmented wheel with a wheel whose colors are in an Archimedean spiral. This forms bands of color that move down (or up) the screen. With segmented wheels, the DMD must "go black" while the wheel transitions from one color to another. Not only can this interfere with persistence of vision and thus accentuate the rainbow effect, it means that the more segments there are, the darker the display will be, all else being equal. The spiral wheel can greatly reduce these effects.
- from [[DLP on Wikipedia|http://en.wikipedia.org/wiki/Rainbow_effect]]
BrillantColor™ Technology Proliferates Line of DLP® Projectors With More Colors Than LCD
see http://www.dlp.com/tech/press_releases_details.aspx?id=1330
http://www.presentationtek.com/2006/12/05/infocus-in72-home-entertainment-dlp-projector-review/
http://www.htcentral.net/lofiversion/index.php?t3847.html
DLP® Front Projection Technology Targets Consumer Lifestyle Markets with New Products Featuring Innovation in Design and Illumination
see http://www.dlp.com/tech/press_releases_details.aspx?id=1310&year=2007
The Color Decay Phenomenon - Texas Instruments
see http://www.orangevillecameraclub.ca/projector/docs/projector_guide.pdf
http://en.wikipedia.org/wiki/D-ILA
http://www.jvc-victor.co.jp/english/pro/dila/feature.html
* [[Toms Hardware|http://www.tomshardware.com/2004/10/15/home_theater_cinema_paradiso_with_video_projectors/page11.html]]
http://focus.ti.com/docs/toolsw/folders/print/dmd-discovery-3000-chipset.html#description
http://focus.ti.com/docs/toolsw/folders/print/dmd-discovery-1100-chipset.html
http://www.projectorpeople.com/dlp-projectors/dlpadvantages.asp
Number of pixels (or dots) per unit of area, measure in number of pixels wide by the number of pixels high that can be displayed on the screen or monitor. More pixels per unit of area produce a higher resolution.
|!COMMON RESOLUTION STANDARDS |>|
|SVGA |800 x 600 |
|XGA |1024 x 768 |
|~HD2 |1280 x 720 |
|WXGA |1366 x 768 |
|SXGA |1280 x 1024 |
|SXGA+ |1400 x 1050 |
|UXGA |1600 x 1400 |
|HD |1920 x 1080 |
|QXGA |2048 x 1536 |
|2K |2048 x 1080 |
* NativeResolution
* MaximumResolution
!!Articles
[[Resolution - Christie's Guide to Digital Projector Basics|Resolution - Christie's Guide to Digital Projector Basics]]
Native resolution is the measure in pixels (color dots or picture elements, for the layperson) of the standard image your computer is designed to produce and project to a screen.
Most computer screens and television monitors have a screen ratio of 4:3 - four pixels wide for every three pixels high. But in the computer world, some notebooks have a 5:4 ratio and in the television world, the emerging HDTV standard requires a screen ratio of 16:9. That means the selection of a projector has to take into account the kinds of information you will be projecting, from standard PowerPoint slides to full-motion video or live feeds.
Compatibility between your source computer and the projector is also at issue. One of the most basic ways to simplify and even improve visual performance is to make sure your computer has the same resolution specifications as the projector you will be using - or, conversely, to buy (or rent or specify) a projector whose resolution matches your computer's.
As a presenter, you needn't strain to master all the numbers and acronyms - just the ones that involve your computer/projector combination. For example, it's easiest to mate an XGA projector to a notebook with an XGA screen, an SXGA+ to an SXGA+, rather than plug together systems with two different standards and trust to the electronic sprites inside each to reconcile themselves to a common interface.
You may find yourself in presentation situations in which there's a mismatch between your computer and the projector being provided for you. However, most modern projection systems feature compression and expansion software for automatic scaling between different resolutions.
Try to avoid compression situations: Times when your computer must move down the scale to project through a projector with a lower resolution standard. Visuals present best when projected by a system that has the same resolution standard as the one in which they were created.
Source: [[Resolution : Christie's Guide to Digital Projector Basics|http://www.christiedigital.com/AMEN/TechnologyExplained/TheProjector/ProjectorBasics/Resolution.htm]]
!!Quick Links to Projector Retailers: (alphabetically)
* [[BestBuy|http://www.bestbuy.ca/catalog/dept.asp?logon=&langid=EN&catid=22225]] - (Epson, Optoma, Viewsonic)
* [[Henry's|http://www.henrys.com/webapp/wcs/stores/servlet/HenrysItemSearch?type=2&catalogId=10001&departmentId=11201&categoryId=11161]] - (Canon, Epson)
* [[Vistek|http://www.vistek.ca/camerastore/DataProjectors.aspx]] - (~BenQ, Canon, Epson, JVC, Mitsubishi, Optoma, Panasonic, Sony)
* [[TigerDirect.ca|http://www.tigerdirect.ca/applications/Category/category_tlc.asp?CatId=23&name=Projectors]]
!!Online Retailers
* [[buy.com|http://www.ca.buy.com/cat.aspx?loc=59637]]
* [[CDW Canada|http://www.cdw.ca/shop/search/results.aspx?grp=MRP]] - (~BenQ, NEC, ASK, Epson, Viewsonic, ~InFocus, Optoma, Sony, Hitachi, Toshiba, Mitsubishi, 3M)
* [[Infonec Computer|http://www.infonec.com/site/main.php?module=catalog&catID=636]] - (Acer, Epson, ~InFocus, Mitsubishi, NEC, Viewsonic, Sony)
* Sample Image download link - http://www.silvanoimaging.com/images/HowTo/SampleFile.jpg
[img[Sample Image for color Calibration|http://www.silvanoimaging.com/images/HowTo/SampleFile.jpg]]
http://www.complete-it.ca/projector/BenQSP831.php
http://www.complete-it.ca/projector/BenQSP830.php
http://www.dbuys.com/Product_list/?&cart_id=19658012
http://www.pcvideoonline.com/aboutus.asp
!!Sorry this tiddler is just CRAP! - It is a place where I tryout new stuff...
ToDo -
@@font-size:large;mike@@
Tabs String
<<tabs "cookie" [[tab name ]] "tool tip" [[tiddler to be displayed]]>>
Color Wheel Speed 100~127.5Hz (2X)
<<slider "chkCookieName" "TiddlerName" "title text" "tooltip">>
PolySiliconTFT
Prevalent with [[LCD]] Projectors
http://en.wikipedia.org/wiki/Screen_door_effect
- [[Considerations|ImportantConsideration]]
- [[BuyersGuides]]
- [[Manufacturers]]
- [[Retailers]]
- FavoriteModels
- SpecificModels
- [[Comparisons|ProductComparisons]]
- [[Rankings|Worldwide Ranking of Projector Manufacturers]]
- ProjectorBulbs
<html> - <a href="http://www.orangevillecameraclub.ca/" target="_self">Home</a> - <a href="http://www.orangevillecameraclub.ca/aboutus.htm" target="_self">About Us</a> - <a href="http://www.orangevillecameraclub.ca/gallery.htm" target="_self">Galleries</a> - <a href="http://www.orangevillecameraclub.ca/learn.htm" target="_self">Learn</a> - <a href="http://www.orangevillecameraclub.ca/links.htm" target="_self">Links</a> - <a href="http://www.orangevillecameraclub.ca/aboutus.htm#officers" target="_self">Contact</a> - </html>
[[OCC|Orangeville Camera Club]][[ - Digital Projectors Wiki|DashBoard]]
!!Specific Model Links (no particular order)
|>| !Local Information Source |>|>|>| !Internet Projector Information Sources |
| !Projector Model | !Projector Wiki Info | !Manufacturers Info | !Link1 | !Link2 | !Link3 |
| Optoma ~EP1690 | EP1690 | [[Optoma1690|http://www.optoma.ca/Product_detail.asp?product_id=277]] | [[ProjectorCentral|http://projectorcentral.com:80/optoma_ep1690.htm]] | | |
| Dell 1200MP | Dell1200MP | | | | |
| Dell 2400MP | Dell2400MP | [[Dell 2400MP|http://www1.ca.dell.com/content/products/productdetails.aspx/proj_2400mp?c=ca&cs=cadhs1&l=en&s=dhs]] | [[CNet|http://reviews.cnet.com/projectors-presentation-devices/dell-2400mp-projector/4505-3180_7-31878925.html]] |[[projectorreviews.com|http://www.projectorreviews.com/dell/2400mp/index.php]] | |
| ~BenQ ~MP622 | BenQMP622 | [[BenQMP622|http://www.benq.com/products/Projector/?product=1109]] | | |
| ~BenQ ~SP831 | BenQSP831 | [[BenQSP831|http://www.benq.ca/products/Projector/?product=733]] | [[CNet|http://asia.cnet.com/reviews/home_av/projectors/0,39037571,40810906p-0,00.htm]] | | |
| ~JVCDLA-RS1U | JVCDLA-RS1U | [[JVCDLA-RS1U|http://www.jvc.ca/jvcpro//product-detail.aspx?h=P2_200&l=E&model=DLA-RS1U]] | [[projectorcentral|http://www.projectorcentral.com/jvc_dla-rs1.htm]] | [[projectorreviews.com|http://www.projectorreviews.com/jvc/dla-rs1u/index.php]] ||
| Epson Powerlite 675c | PowerLite675c | [[Epson(pdf only)|http://www.orangevillecameraclub.ca/projector/docs/PL765c_CatalogSheet.pdf]] | [[Cnet|http://reviews.cnet.com/home-theater-projectors/epson-powerlite-765c/4505-7858_7-31428728.html]] | | |
| Epson Powerlite 822p | PowerLite822p | [[Epson|http://www.epson.ca/cgi-bin/ceStore/consumer/consDetail.jsp?BV_UseBVCookie=yes&infoType=Specs&oid=60297583&category=Products]] | | | |
| Epson Powerlite 1700c | PowerLite1700c | [[Epson|http://www.epson.ca/cgi-bin/ceStore/consumer/consDetail.jsp?BV_UseBVCookie=yes&infoType=Specs&oid=60297583&category=Products]] | | | |
| Mitsubishi XD460U | | [[Mitsubishi|http://www.mitsubishi-presentations.com/products/projectors/XD460U.html]] | | | |
| | | | | | |
.borderless, .borderless table, .borderless td, .borderless tr, .borderless th, .borderless tbody { border:0 !important; margin:0 !important; padding:2px !important; td.vertical-align:top !important;margin-left: auto !important; margin-right: auto !important;}
''Suggestions''
* A high quality robust carrying case should be included in the cost of the projector.
!!Subject Links
HighLights - important information members should not miss - check this tiddler often
[[Overview]] - Wiki and purpose described
NewInformation - links to the latest wiki additions
ProjectorTechnology - information about the different technologies for projectors
* [[DLP]]
** [[DMD]]
** ColorWheel
** AdjustableIris
** LCDvsDLP
** BrilliantColor
** DarkChip
* [[LCD]]
** LCDvsDLP
* [[LCoS]]
* [[D-ILA]]
* Bulbs
** [[UHP]]
TechnologyProblems - information about problems for the different technologies
* ScreenDoorEffect
* RainbowEffect
* LumensAndColorTemperature
* ColorBreak-up
* ColorDecayPhenomenon
ProjectorSpecs - information about projector specifications, what are they, what do they describe
* AspectRatio or [[ScreenRatio|AspectRatio]]
* AcousticNoise
* [[Bulbs]]
** [[UHP]]
* [[Color]]
* [[Connection]]
* ContrastRatio
* LightOutput
** Brightness - see LightOutput
** [[Lumen]]
* [[Resolution]]
** NativeResolution
** MaximumResolution
* ThrowDistance
ClubTargetSpecs - this tiddler lists the standing ''Target Specifications'' at this time
[[Manufacturers]] - links to different manufacturers projector products
BuyersGuides - links to buyer guides, reviewer information
ProductComparisons - a place to see the projector specs side by side
* UnacceptableProjectors
* AcceptableProjectors
* ALL NEW! - Craig's Short List ([[CB]]) [[Projector Data Matrix Oct.8/07 - Short List|http://www.orangevillecameraclub.ca/projector/ProjectorDataOct8ShortList.html]]
* Craig's Comparison Table Updated ([[CB]]) [[Projector Data Matrix Oct.8/07|http://www.orangevillecameraclub.ca/projector/ProjectorDataOct8.html]]
SpecificModels
* EP1690 - Optoma
* Dell2400MP
ImportantConsideration - information which may affect performance of any purchase
[[Calculators & Tools]] - quick links to calculators to aid with projector selection
* [[Color Sample Image for Display Calibration from Silvano|SampleImage]]
MemberComments - a place to chronicle remarks and opinions pertinent to the projector selection
[[Questions]] - questions posed to the group or which need to addressed for selection of a projector
[[Retailers]] - quick links to retailers, online retailers
[[RSS]] - information about and how to subscribe to this wikis Really Simple Syndication (RSS)
MeetingPlanner - information to help with planning of meetings
[[Reference List|reference]]
[[Documents]]
[[How to use this Wiki?]] - help for those who are unfamiliar with wikis, this still of web page
* [[What is a Wiki?]]
** [[Wiki]]
* ViewingContent of this Wiki
* [[Where is the Content?]]
** ViewingContent
** [[Tiddler]]
* PageOrganization
* [[What is a "Tiddler"?]]
** MicroContent
* TiddlerOrganization
ScratchPad - a place for the moderator to work
[[Help]] - some help for visitors
** [[How to use this Wiki?]]
- [[Projector|ProjectorTechnology]]
- [[Components]]
- [[Problems|TechnologyProblems]]
- [[Specifications|ProjectorSpecs]]
- TradeMarks
* ScreenDoorEffect
* RainbowEffect
* LumensAndColorTemperature
* ColorBreak-up
* ColorDecayPhenomenon
Definition:
Factors Affecting our Calculation:
* Screen = approx. 6 ft sq.
* Screen Color = Unknown
* Distance = ???
"[[Tiddler]]" is the name given to a unit of MicroContent in TiddlyWiki.
[[Tiddler]]s are pervasive in TiddlyWiki. The ~MainMenu is defined by a [[Tiddler]], plugins are delivered in [[Tiddler]], there are special ~StyleSheet [[Tiddler]], and so on.
Other systems have analogous concepts with more prosaic names: like "items", "entries", "entities". Even though "[[Tiddler]]" is undoubtedly a ~SillyName it at least has the virtue of being confusingly distinctive rather than confusingly generic.
Original Author Jeremy Ruston
|>|>|| close | close others | edit | more |
|!Tiddler Title |>|>|>|>|>|>|
| author | date ||>|>|>|>|
|>|>|>|>|>| Main Window | Tags |
|>|>|>|>|>|~| Tags |
|>|>|>|>|>|~| Tags |
|>|>|>|>|>|~| Tags |
|>|>|>|>|>|~| Tags |
''The diagram above depicts the organization of a typical "Tiddler".''
* "Click" "close" to hide "Tiddler".
TiddlyWiki is a unique self contained [[Wiki]]. It is comprised of a single HTML web page which contains special Javascript.
Using an ordinary web browser (preferably Firefox) the user can edit this single page and save the content.
[[TiddlyWiki website|http://www.tiddlywiki.com]]
[[TiddlyWiki Guides|http://tiddlywikiguides.org/index.php?title=TiddlyWiki_Guides]]
--* Make a Table of Contents--
* paraphrase articles/clip extra text (just facts) done
* develop the references (eg. ~ReFxx),
!Texas Instruments
DLP® chip
DLP® technology
DLP® TV
DLP® Projector
!!!DLP® Chip
Technology
Products
TV
Projector
Subsystem
!!!DLP Cinema® Chip
Technology
Products
TV
Projector
Subsystem
!!!Digital Light Processing™ Chip
Technology
Products
TV
Projector
Subsystem
!!!DynamicBlack™
Feature
Technology
!!!SmoothPicture™
Feature
Technology
!!!CineCanvas™
Feature
Technology
!!!CineBlack™
Feature
Technology
!!!CinePallette™
Feature
Technology
!!!CineLink™
Feature
Technology
!!!DarkChip2™
Feature
Technology
!!!TrueVision™
Feature
Technology
The UHP mercury arc lamp was developed by Philips in 1995 for use in commercial projection systems. Unlike other common mercury vapor lamps used in projection systems, it is not a metal halide lamp, but uses only mercury. Philips claims a lifetime of over 10,000 hours for the lamps. These lamps are highly efficient compared to other projection lamps - A 132 watt UHP lamp is used by Samsung to power a 61" rear-projection TV
- from [[UHP on Wikipedia|http://en.wikipedia.org/wiki/UHP]]
* Sometimes a good place to start when making an important choice is to analyze what is not acceptable.
|!Model | !System | !Resolution | !Pixel Number | !Brightness | !Cont. Ratio | !Bulb |
|Epson Powerlite S3 | 3xLCD | SVGA | 800 x 600 | 1600 L | 500:1 | 135W UHE |
|*Projectors listed here have been assessed and will not be acceptable for our clubs needs.|>|>|>|>|>|>|
Use the links in the "Main" left side menu under "Subject Links" or ''Start Here''. These links will start your exploration of this Wiki.
* ''Subject Links'' - Contains links to the [[Wiki]] content.
* ''Wiki Stuff'' - Contains links to [[Wiki]] features used in editing. This section is ''not'' useful to visitors who simply want to view content.
* This is a "Tiddler". - This text which you are now reading is contained within a "Tiddler".
* "[[Tiddler]]" is the name given to a unit of MicroContent in TiddlyWiki.
* [[Tiddlers]] are pervasive in TiddlyWiki. The "Content" of this Wiki is comprised of "[[Tiddler]]s", the "~MainMenu" is defined by a [[Tiddler]], plugins (which add functionality to this Wiki) are delivered in [[Tiddler]]s, there are special ~StyleSheet [[Tiddler]]s (which allow the appearance of the page to vary), and so on.
* ''Note:'' to close (hide) a [[Tiddler]], "click the "close" link in the [[Tiddler]]s top right hand corner.
>"Wiki Wiki" is Hawaiian for "quick".
>Invented and named by Ward Cunningham.
>[[Wiki]] is a piece of server software that allows users to freely create and edit Web page content using any Web browser. [[Wiki]] supports hyperlinks and has a simple text syntax for creating new pages and crosslinks between internal pages on the fly. - from [[Wiki.org|http://www.wiki.org/wiki.cgi?WhatIsWiki]]
''[[Wiki]] Features:''
* Editable content with the use of a simple Internet browser program (like Microsofts Internet Explorer)
* Multiple users can contribute to the online content. It is a great collaboration tool.
* Content is stored in a database, while the [[Wiki]] software formats and organizes the pages.
This is a [[Wiki]] utilizing TiddlyWiki; a self-editing and self-contained HTML page.
More information can be found in the [[Help]] Section.
# The ''content'' of this Wiki is all stored within this single page and is normally hidden.
# ViewingContent is accomplished using the links in the Main left hand menu under Subject Links.
# "Clicking" on a link opens (make visible) the content within this page. Closing (make hidden) the content ([[Tiddler]]s) by using the "close" link within each [[Tiddler]] or use the "close all" link in the right hand menu to close all content [[Tiddler]]s.
A Wiki is a piece of server software which allows users to freely create and edit web content using only a web browser. The software controls the page formatting and organization with the exception of some text formating which can be specified by the user. Information is commonly organized in MicroContent and is well suited to informational writing. .
!!How is a Wiki Used?
A [[Wiki]] is well suited to collaboration by many authors for complete, factual texts. Wikis excel at informational writing. Some use [[Wiki]]s for creating Websites or Blogs.
This [[Wiki]] utilizes TiddlyWiki
Other [[Wiki]] Software:
MediaWiki
More info:
[[Wiki on Wikipedia|http://en.wikipedia.org/wiki/Wiki]]
- ToDo
- GettingStarted
- [[Menus]]
- DefaultTiddlers
- ScratchPad
A [[Wiki]] Word is any word which is identified as a link to other content.
Usually Wiki software identifies words to be used as Wiki Words automatically, when it encounters at least two capital letters within the word. Typically two capitalized words are pushed together by eliminating the space between them. This is also called CamelCase. CamelCase preserves much the legibility of conventional writing.
It is possible to force (Wikize) a word to be a Wiki Word without using CamelCase. This is accomplished in a variety of ways depending upon which Wiki software you are using. TiddlyWiki wikizes a word when it is enclosed by double square brackets (eg [ [word] ] ).
[img[Worldwide Ranking of Projector Manufacturers|http://www.orangevillecameraclub.ca/projector/images/Projector Manufacturers.jpg]]
!Reference List for Digital Projector Wiki