Why every mobile phone has one? Same reason I guess... To be honest with you, there is also a microphone, but I'm not sure if they get used... I got them set to on for the DJI fly app and off for every other app... You could download an app for the camera and see what you get out of it...
Hi, fanse5ea82b8. Thank you for reaching out. It is not a camera but a photosensitive sensor. When the remote controller enables the auto brightness mode, the screen brightness will increase when the light is enhanced, and vice versa.