what causes rainbow effect in DLP projectors?
Dec.29, 2010 in
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December 29th, 2010 at 04:07
A magnet close to the screen.
December 29th, 2010 at 04:11
The spinning color wheel in the DLP technology.
If the wheel can’t spin fast enough to make white (a mixture of all colors) then white objects will look like they have rainbow stripes to them.
Fast moving white objects are most prone to this, sports in particular.
December 29th, 2010 at 04:27
The rainbow effect is from the use of a color wheel, but no object on the screen can leave a trail of colors because the wheel completes all colors at least once (most projectors nowadays much more than once) in a single frame. During one frame, an object cannot move. However, when your eyes move, they can cause the image on the retina to move between color fields, leaving a color trail on the retinal image. Since this is a physiological effect in the eye, and not a physical effect on the screen, some people will see the rainbows and others will not. I have yet to see rainbows on my DLP projector or any other, but iI do know that many people can.