For smartphone designers, extending battery life on the devices is a complex dance of sharing a limited amount of milliampere-hours between the cellular radio, the device's display and the processors that are converting digital bits into viewable content. Apple has been awarded a patent for a "Portable media device with power-managed display," which describes a way to adjust the brightness of a smartphone screen depending on what is being displayed.
The patent describes how the content being displayed is identified and
