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Discussion Starter #1
Dang...cannot edit the typo in the subject line. Oh well.


Perhaps we can put an end to some confusions surrounding RAINBOWS for me and others.


Having read numerous posts in this forum, it appears that there are several types of rainbows and below is my attempt at basic explanations:


1) Color-wheel "DLP" Rainbows. Generally exhibited as RGB color fringes. If you have not seen and want to see this type of rainbow and have a single-chip DLP with a three-color colorwheel, just shake your head violently left-and-right while the screen is showing a high-contrast object like a pluge test pattern. You should start seeing the high-intensity RGB colors trailing off the edges of the objects. In this particular case the rainbow is just the three RGB colors. It has been said that this type of rainbow can be made less pronounced by turning down contrast, changing the color-wheel spin frequency (the refresh rate of your video source), and/or avoiding darting eyes while watching the film. http://www.avsforum.com/ubb/smile.gif


For a detailed technical explanation of this effect, go to here.


2) Video Noise Rainbows. This type of rainbows are exhibited in poor-quality video sources and can be seen even without any moving objects on the screen. It may be introduced as part of the moire effect. The rainbows usually show up as faint transparent-looking wavy rainbow-like colors over objects. If the rainbow is moire induced you cannot avoid it as it will show up differently for different resolutions and output device combinations. You can only avoid this by going to real film.


Feel free to correct the above definitions as a lot of us here would like to know just exactly what we're seeing in layman's terms. http://www.avsforum.com/ubb/smile.gif


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Editor of the AVS Skyworth FAQ and Official Panasonic RP91 Firmware Upgrade Request from OWNERS pages.



[This message has been edited by Yahoo (edited 08-09-2001).]
 
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