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May 27, 2016 at 17:15 comment added PANAGOLA Guess we are not talking of LED bulbs here. As far as LED displays such as AMOLED, the brightness of a pixel is proportional to the power applied. In the case of LCD screens, backlit by LED or otherwise, it is the transmittance of the Liquid Crystal layer in front of the backlit that is changed by varying the power (voltage & current) supplied to the individual pixels.
May 27, 2016 at 16:14 comment added Jonathan I don't know if you know this but the way that LEDs work and dimming light bulbs work is that they only have one brightness. Any amount of dimming is simply caused by strobing. I've wired them myself. Search YouTube for how dimming bulbs work
May 27, 2016 at 15:29 comment added PANAGOLA No, Twilight does not use black frames. You can get any dimness all the way upto 100% opacity. Just think of a fully black layer over your screen. The brightness setting essentially changes the maximum brightness value of the display. But within that range of minimum brightness to maximum brightness, the darker colors emit lesser light while whiter/lighter areas emit more night. The overlay essentially makes the screen darker. That is why apps such as Twilight is able to give more darkness than what the brightness setting alone could achieve.
May 26, 2016 at 17:17 comment added Jonathan What about serving black Frame a intermittently? Does the Android app twilight do that? It seems to be able to dim the screen far beyond OS brightness settings
May 26, 2016 at 9:52 history edited PANAGOLA CC BY-SA 3.0
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May 26, 2016 at 7:24 review Late answers
May 26, 2016 at 14:04
May 26, 2016 at 7:06 history answered PANAGOLA CC BY-SA 3.0