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That would be neat. But it's essentially impossible with a traditional LCD screen - the physics don't work that way. The way a backlit LCD works is that the ba
by jbri 15y ago
That would be neat. But it's essentially impossible with a traditional LCD screen - the physics don't work that way.
The way a backlit LCD works is that the backlight produces light, which goes straight into a polarizer. That polarizer absorbs 50% of the light energy - if it absorbed any less, then the light wouldn't be polarized. Then the light passes through the liquid crystal element to another polarizer, which either passes the light through or blocks it completely.
If you assume that half the screen is lit at any given time, it's physically impossible to not absorb 75% of the light in the polarizer. There are really only two ways to improve this, one is to produce polarized light directly, and the other is to return the lost energy to the device some other way (as this does).
- Someone 15y agoA better solution is to have the backlight directly produce polarized light. If you do that, you do not need the first polarizer that blocks half the light. There is hope that that is possible. See http://www.semiconductor-today.com/news_items/2010/OCT/RPI_221010.htm http://www.semiconductor-today.com/news_items/2010/OCT/RPI_2...
- deleted 15y ago[deleted]
- jules 15y agoBeam splitting polarizers split the incoming unpolarized beam into two polarized beams, or more commonly into one polarized beam and another somewhat polarized beam. By stacking many of them you can obtain a polarizer that loses less than 50% of the light. http://en.wikipedia.org/wiki/Polarizer#Beam-splitting_polarizers http://en.wikipedia.org/wiki/Polarizer#Beam-splitting_polari...