LCD Vertical Banding or DLP Rainbows?

[Archived in Dlp, Entry, LCD]

[HDBlog.net] Two of the most popular television technologies are, of course, DLP and LCD. Each has their own pluses and minuses, and they aren’t necessarily the same. One of DLP’s problems is the rainbow effect that’s caused by the spinning colour wheel. And one of LCD’s problems is the vertical banding effect. Vertical banding, though, doesn’t happen with every LCD display. Projector Central discusses the issue. Link: Projector Central - LCD vertical banding or DLP rainbows?...

Some slightly related from Technorati and Google.

[Both Worlds] HDTV Comes of Age, DVD to Follow: Some HDTVs, including plasma, are also vulnerable to ghost images being burned permanently into the screen. This requires pictures to be stretched to fit the screen so that the black vertical or horizontal letter box bars will not be burned in, often resulting in having to view a distorted image. 

[IDEA ORIENTED | BRAND + NOISE STRUCTURE. NAVIGATION OF IDEAS - THOUGHTS + EXPRESSIONS] Standard and Widescreen Formats Explained: An incoming standard TV video signal consists of 480 lines of usable video resolution (the actual broadcast signal contains 525 lines of video information, but only approximately 480 lines are used as visible information). When displaying a standard TV broadcast with an LCD or DLP projector, the incoming image will first be expanded so that it corresponds/maps to the resolution of the projector's internal panel (either exactly 800 pixels wide x 600 pixels/lines in height if SVGA, or 1024 x 768 if XGA). And, as previously mentioned, a mathematical algorithm is used to add/interpolate pixels within the expanded image, so that the density of pixels will remain the same as the original signal. The resulting image, when projected, will completely fill the 4:3 ratio screen top-to-bottom and left-to-right, regardless of its size, with a bright, dynamic picture.

[Videosystems.com] Pete Putman CTS - video systems - infocomm preview - lcd dlp ...: The flat screen market isn't any less confusing. So many companies have jumped into the ring to sell OEM products that it's hard to determine which company actually makes which products. Due to overcapacity of plasma production lines in Japan and Korea, smaller resellers are making aggressive deals to buy production-line capacity a month at a time. The result is deep price cuts, which are turning the plasma market on its head.

[Projector.lifetips.com] Home Theater, Home Theater Projector, LCD, DLP: The true downside to CRT projectors is the level of brightness and range of maintenance involved. In terms of brightness, even the top of the line CRT projectors top out at about 500 lumens. Now in comparison with something like the NEC LT265 DLP projector, which has 2500 lumens of brightness and a much stronger contrast ratio, it begs the question of how important is having no pixels when you can gain so much more from another technology?

[Hdtv.engadget.com] The VALUESTAR W VW900/CD, NEC’s new 26-inch LCD TV + PC - HDTV ...: Jeff: I am aware that most bargain-basement "HDTVs" are pieces of junk that scale images down and can't handle 1080i resolution natively. And there are even MORE sets that can do 1080i (scaled) but not do 720p because they can't process the higher number of lines per single pass required (mostly conventional rear projection TVs are like this, not LCD/DLP/Plasma). That the native resolution of my set was 1080i resolution or higher was the #1 concern when I was buying an HDTV set. Exactly tied with that was its ability to display a 720p signal truly progressively.

 [Scienceblog.com] Science Blog - Science Gifts - Toshiba 52HM94 52" DLP Integrated ...: A 3D Y/C (4 MB, 10-bit) digital comb filter with Vertical Contour Correction hel ps eliminate dot crawl and color bleed and significantly reduces detail noise, s een as shimmering or flicker, in complex or intricately detailed scenes. Color t emperature controls allow you to adjust white balance. The "Warm" setting reduce s the color temperature to an NTSC-standard 6,500 degrees Kelvin and delivers a redder image that is ideal for display in a dimly lit room.

 [Scienceblog.com] Science Blog - Science Gifts - Toshiba 62HM94 62" DLP Integrated ...: A 3D Y/C (4 MB, 10-bit) digital comb filter with Vertical Contour Correction hel ps eliminate dot crawl and color bleed and significantly reduces detail noise, s een as shimmering or flicker, in complex or intricately detailed scenes. Color t emperature controls allow you to adjust white balance. The "Warm" setting reduce s the color temperature to an NTSC-standard 6,500 degrees Kelvin and delivers a redder image that is ideal for display in a dimly lit room.

Reflected tags on Technorati: Blog, Dlp, Plasma TV News

Posted at May 28, 2005 12:12 PM