Why Do Phones Automatically Brighten at Night?

Your phone has a tiny eye that can tell if it's dark or bright. It uses this eye to know when to make the screen brighter or dimmer, so you don't get tired looking at it in the dark, kind of like how your eyes adjust in different lights.

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Examples

When you walk from outside into a dimly lit room, your phone gets brighter automatically.
Your phone makes the screen dimmer when it’s night time and you’re reading in bed.
You turn off the lights at night, your phone screen becomes softer so it doesn't bother you.

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Categories: Technology · smartphone· display technology· light sensors· user experience· automation