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[Geek] Polarizing filter lets LCDs harvest and recycle energy

post #1 of 7
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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 doesn’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 there’s a decent light source for the photovoltaic filter it to use, for example, you leave it in direct sunlight.
http://www.geek.com/articles/mobile/...ergy-20110812/




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.
post #2 of 7
ROFL, love the pic, and my guess is its energy the we cant really see, albeit i bet it does make it dimmer overall
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post #3 of 7
Couldn't you also use this on windows too? As long as the price isn't enormous at least because that's a significant area to cover, but if it is proposed to be put on TVs, a window is not out of the realm of possibilities.
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post #4 of 7
Quote:
Originally Posted by Phaedrus2129 View Post
It seems to me that they're capturing 75% of the photons emitted by the LCD... so the screen will be 75% dimmer.
Yea that makes no sense to me, if they're just harvesting energy from the light of the screen, it would be more efficient to just dim the screen and harvest nothing.

I would rather them harvest the energy from my TV that is wasted as heat, then my TV would use less power and not heat up my room as much.
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post #5 of 7
Quote:
Originally Posted by Phaedrus2129 View Post
That's what I do to power my folding.

Yea I don't see this happening, smartphone maybe just for the solar but you should never have light hitting your TV.
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post #6 of 7
Quote:
Originally Posted by lordikon View Post
Yea that makes no sense to me, if they're just harvesting energy from the light of the screen, it would be more efficient to just dim the screen and harvest nothing.

I would rather them harvest the energy from my TV that is wasted as heat, then my TV would use less power and not heat up my room as much.
you are misunderstanding

LCDs are already filtering out most of the light before it exits .. they replaced the traditional filter with a photovoltaic one that "recycles" instead of just blocking light.
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post #7 of 7
Maybe I'm an idiot, but this got me thinking about my privacy filter at work. If they could make the "panels" super-slim and orientate them perpendicular to the screen, you could still harvest light without as much noticeable dimming. The obvious tradeoff would be the viewing range. I'm sure they're plenty of people already use privacy filters at work and there are probably plenty of people who don't "share" the screen at home and could use something like what I described...unless of course I'm being an idiot. If I could slap a filter on my screen when I'm the only one viewing it and generate some kind of power from it, I think that would be great. For example, if I'm playing a game alone on my pc, as is usually the case since crowds don't form around me while I'm getting massacred in CS:S, my screen is just shooting unnecessary light all over my room.
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