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Old May 26th, 2013, 11:53 AM   #191 (permalink)
SuperC142
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Hi Tlicious1020- I thought I'd mention an unexpected/non-intuitive thing about LCD screens. Believe it or not, it actually takes a little more power to make black (as opposed to white). This is because, the way LCD works is, there a light source and, in front of that is the LCD components. To make black, the pixels on the LCD screen must fully-block all of the light coming from behind that point (by having two, perpendicular, polarized layers, one of which is permanent). Doing this requires the maximum voltage. To make pure white, the LCD is simply "open", allowing all of the light to shine through (requiring no voltage). For some shade in between, some other voltage (between 0 and max) is used. This is why some LCDs are better at making black then others (the better ones are more efficient at blocking all of the light).

Anyway- to sum up: it may be a little unintuitive, but a completely black screen consumes the most power whereas a completely white screen consumes the least amount of power.
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