A bit of history. The first color TV system approved by the FCC was from
CBS, which involved a color wheel in front of the CRT, or a belt going
around the whole tube. This limited the CRT size, of course, and either
slowed the refresh rate or demanded more transmission bandwidth. In a
bet-your-company tour de force, RCA developed the compatable color TV system
now used worldwide. It was RCA's crowning achievement, plus the technology
for putting color and hi-fi sound on VHS tapes.
The small size and very fast response of the DLP array makes a color wheel
quite reasonable. It also enables better color rendition by the selection of
filters. The red phosphor in color CRTs is a bit too orange for best
rendition of reds, but that is necessary to get the needed brightness. A
color wheel doesn't have that limitation. The competing LCD light valves
cand use dichroic mirrors to merge images from three valve arrays, but that
approach is apparently not making much commercial headway.
Mike Carrell
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On 1/8/07, Mike Carrell <[EMAIL PROTECTED]> wrote:
There is a misunderstanding of the nature of DLP technology. The active
element is an array of tiny mirrors created by silicon machining
techniques,
one for each pixel.
You forget the spinning light filter for RGB. Truly a rube goldberg
technology:
http://www.dlp.com/
Terry
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