Most of you are probably familiar with the “Automatic Brightness” but have you ever really noticed the Auto adjust screen power option?
Menu > Settings > Display
If you go into the Galaxy S II’s display settings you will find an option to have the phone automatically adjust screen power, which can “Save power by analyzing image and adjusting LCD brightness.” After some research I stumbled upon XDA user puremind’s results after extensive testing of the Samsung Super AMOLED Plus display. Although it wasn’t clear exaclty how the measurements were taken, puremind measured the display’s maximum brightness (in candela per square meter) in film, standard and dynamic mode with the Auto adjust screen power on and off.
He notes that all measurements were made with auto-brightness off and the screen on max brightness. Auto adjust screen power engaged: 443
- Film Mode: 147cd/m²
- Standard Mode:149cd/m²
- Dynamic Mode: 147cd/m²
Auto adjust screen power disengaged: 844
- Film Mode: 276 cd/m²
- Standard Mode:285 cd/m²
- Dynamic Mode: 283 cd/m²
Wowza–that is a pretty significant increase in brightness! Thats a 90% average increase in screen brightness which should correlate to about a 90% increase in battery consumption. Although deactivating this feature can nearly double your brightness, it also kills your battery life. However, I should note that this will also be affected by what is being displayed on the screen. We recommend leaving this feature on unless you are reading in the sun.