Quote:
Originally Posted by Quoth
With eink, the light is reflected off the rear eink layer so passes through the coloured filter layer twice. Thus what ever losses there are (attenuation), are doubled.
|
Going through the filter twice does reduce the light a little compared to going through once, but it doesn't double. The main attenuation is by restricting the light to just one range of colour (red, green or blue). That only happens once.
It is a problem with reflective LCDs - they polarise light, and so lose 50% of the light on the way in, and then 50% on the way out, because the reflection from the back of the LCD scrambles to polarisation again.