[shahram72]

I was noticing that many of you are turning off the clear segment on those DLP projectors that have such a feature. Does this eliminate the rainbow problem? Or at least help it? I have a really crappy 640x480 LCD projector setup right now and really want to get a new projector when funds or insanity allow. But I am one of those who see details that others can not, so I think I am likely to see rainbows. So far I have been leaning toward LCD models because of this. Thanks for the help.

 

[Morbius]

Shahram,


Turning off the clear segment is not a cure for rainbow.


The reason you get a rainbox on a single chip DLP projector

is that, at any given moment, it is projecting only one

color. It is relying on the persistence of vision effect

of your eye to combine the 3 primary colors into the proper

colors for the scene.


If you move your eyes or head quickly - the 3 different

color images don't fall on the same part of the retina of

your eye - and the persistence of vision blending of colors

won't happen properly - the result is the rainbow effect.


Only by projecting all three colors simultaneously which is

what 3 chip projectors do - can you eliminate rainbows.


Greg

 

[Dave W]

Or you must sequence through the colors MUCH faster. I'm skeptical that 2x or even 3x color wheels would completely eliminate the effect, but if they would do 2-3x wheels with 6+ color segments, maybe that would do it.


Dave

 

[visar]

@Dave


The new Sharp should have a 5x 6-segment colorwheel.

 

[lmo]

Many people have reported (at least with the LT150) that turning off the white segment does help to reduce the rainbows.

 

[tlastrange]

Bottom line: No, turning off the white segment does not eliminate rainbows. I still see them http://www.avsforum.com/ubb/frown.gif


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Tom L.

NEC LT150 FAQ

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