[johnm60]

Hi there


I recently bought an HT1000 and am trying my best to ignore or get used to my sensitivity to rainbows (I posted a few weeks ago on this).


While I have been musing about this is reminded me of oscilloscopes I used to use when I was an electronics engineer. Depending on the type of the scope, there would be a different phosphor on the tube that had different decay characterisitics. So this got me thinking about the use of phosphor coatings on projection screens in order to reduce rainbows. The idea being that a phosphor is chosen to have a decay characteristic that helps integrate the RGB sequences, but doesn't cause image ghosting or spoil the colour characteristics.


Anyone know if any research has been done on this ? Is it even possible to coat a phosphor on a front projection screen? Or would such a scheme introduce too many other problems?


Cheers

John

 

[Don Landis]

Suggestion to help you lose sensitivity to those rainbows-


If you can sit farther back and try to learn to expand your field of vision while watching the movie to the whole screen. Rainbows have been shown to be exacerbated by rapid visual movent from elongated bright whites on a dark screen. If you avoid darting your vision around the screen you will reduce your frequency of observing the rainbow effect.