Decrease screen brightness below minimum level, by turning off individual pixels. This way the screen contrast is kept at the same level.
Save battery on newer AMOLED screens - they will turn off black pixels completely. Especially good for 4K screens - disable all those pixels you don't need!
Includes screen pattern editor and light sensor support for turning filter off automatically.
Screen pattern is shifted each 5 minutes to prevent uneven pixel wearout.
App sources available here: https://github.com/pelya/screen-dimmer-pixel-filter