On an laptop LCD screen does the color black use more energy than the color white?
I don’t know exactly how laptop screens work, but if a screen has to be backlit anyway, wouldn’t any additional color need extra energy?
thanks for all of your expert opinions!
Most laptop screens are TN-film (because it is the cheapest of the TFT technologies and also uses the least power) and with TN-film the pixels are on when no power is applied to the transistors and off when power is applied.
That means that most laptop screens do use more power when displaying black (or as close to black as they can get) then they do when displaying white although the difference is pretty insignificant.
Although you should reduce the brightness of the backlight to as low as you can read the screen when on battery.
A few laptops have IPS or *VA screens which use more power displaying white than displaying black but those are very uncommon in laptops because of higher cost for the panel and higher power consumption of those technologies. IPS and VA are pretty much reserved for high end desktop monitors where the higher power consumption isn’t an issue.
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