By using the new polarizing filter a device can harvest energy from the LCD as it is being used. So rather than the energy being wasted just as viewable light, it can also act as an energy generator itself. But the energy generation doesnâ€™t just happen when the display is in use. The new polarizing filter will also continue to generate energy from natural light just like a typical solar panel.
If such a filter were used in a smartphone it could significantly increase battery life even if you have the screen active for hours each day. When your phone dims the screen to save power it will also continue to refill the battery as long as thereâ€™s a decent light source for the photovoltaic filter it to use, for example, you leave it in direct sunlight.
Um, guys? Aren't you basically doing this?
It seems to me that they're capturing 75% of the photons emitted by the LCD... so the screen will be 75% dimmer.