Do hi-gain screens exacerbate DLP rainbow? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 4 Old 04-16-2001, 01:30 PM - Thread Starter
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Hi all-

I recently acquired a Compaq MP1600 1-chip DLP projector, although I love the smooth detailed picture, I've discovered that I am definitely sensitive to the rainbow effect. I currently have a Da-Lite high power screen (gain 2.8), and I'm wondering if switching to a matte screen (gain 1.0) would help reduce the rainbow effect. Has there ever been any correlation made between screen gain and rainbow effect?


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post #2 of 4 Old 04-17-2001, 08:39 AM
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I don't know about any definitive studies, but I know from personal experience that when I moved from a white screen to a gray screen I noticed the rainbow a lot less. Rainbow is worst with bright, glarey whites against dark backgrounds. Reducing the intensity of the whites helped.

I imagine you'll find the same thing going from a high-gain screen to a lower-gain screen.
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post #3 of 4 Old 04-17-2001, 06:10 PM
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hi Dave,

Maybe you could try hanging a plain bedsheet in front of the screen and watch a movie clip that displays the rainbow effect very obviously.

If it seems less obvious, then going to a lower gain could improve your viewing pleasure.


Originally Posted by elmalloc
Who says Cameron is "right" and why do we care about him so much - lol!

I trust Gary Lightfoot more than James Cameron.
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post #4 of 4 Old 04-17-2001, 09:19 PM
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Try running the projector from a computer.

I dont think that the lower gain will make any difference.

At least, in my experience, it did not make any.

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