OLED displays don't consume a lot of power when displaying black.
The working principle of OLED (organic light-emitting diode) display is that current drives each pixel unit to emit light by itself. When the OLED displays black, the light-emitting unit itself consumes no or almost no power. This is because turning the OLED screen into dark mode and night mode can significantly save power. Especially when displaying black, the driving current of all pixels drops to zero, so there is naturally no power consumption. This is different from an LCD (liquid crystal display) screen. The backlight of an LCD screen consumes the same power no matter what color is displayed. When an OLED screen displays black, it consumes no or almost no power because it does not need to light up the pixels. electricity.
In addition, some people believe that black background power saving is pseudoscience, pointing out that not only does black background not save power, but it also consumes more power than a completely white background. However, this view is based on the technical characteristics of LCD screens and does not apply to OLED screens. For OLED screens, due to its self-illuminating properties, it actually helps save power when displaying black.