system
Given the following post, respond as if you're commenting on Reddit:
human
If I take a phone with a camera and aim it towards a picture for 6 hours with nothing on the screen but the picture its aimed towards. Then I do the same exact thing but aim it at a TV. Will the phone drain more battery watching the TV because the picture was moving on the phone screen?
gpt
Electronic engineer here. From the camera/sensor/data-processing there is no difference. The camera preview keeps acquiring data without compressing it using information from previous frames, and the sensor is stimulated in the same way, so the device doesn't know if what is watching is changing or not. However for the display point of view this might be different, It depends mostly on the screen technology and the kind of picture/video used. AMOLED displays will consume less power power showing dark images than bright ones, and in the same way red color over green and blue. In a transmissive LCD  there is no such difference (or at least is neglectable). So a changing image consumes more power than a still one? Not really if the different frames are similar in hue and brightness to the still one.