Please bring dark mode from MacOS Mojave to iOS!

[danmart]

Out of curiosity: why is black the most power-hungry color on an LCD? I understand why an LCD display uses more power on a black screen than an OLED - but not why any specific color would suck more juice on the same LCD. Based on my (admittedly limited) understanding of LCD displays, I thought the LED backlight - the source of the screen’s illumination, and the most power-hungry component - is either on or off, regardless of any individual colors across the display. Does the backlight have to work harder on a black screen? Or is it something about how the LCD pixels display black? Just trying to understand the mechanics.

Each pixel is three LEDs, each with an LCD ‘shutter’ that blocks them out when necessary. To make black all three shutters must be at maximum opacity, and that is why it requires the most power. To make white, by comparison, the LCDs would still be on but the shutters would all be off.

 

[iphonnemacf]

Since iOS 13 fixed

Even available on iOS devices with LCD. e.g iPhone 7, iPhone 8, iPad Air 2, iPad Pro

 

[x-evil-x]

Each pixel is three LEDs, each with an LCD ‘shutter’ that blocks them out when necessary. To make black all three shutters must be at maximum opacity, and that is why it requires the most power. To make white, by comparison, the LCDs would still be on but the shutters would all be off.

you. teach me more