Why Do Phones Automatically Brighten in Sunlight?

Phones have a tiny sensor that can tell how bright or dark it is around them. When you go outside and the sun shines on your phone, this sensor sees the light and tells the screen to get brighter so you can still see what’s on it easily.

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Examples

Your phone’s screen gets brighter when you walk from a dark room to the sunlit sidewalk.
You’re outside, and your phone’s screen suddenly gets brighter so you can read it easily.
Your phone’s brightness changes depending on whether you're in the shade or in direct sunlight.

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Categories: Technology · smartphones· sensors· display technology· light sensing· user experience