Phones have a special kind of light that helps them see if you're looking at them. It works like this: the phone sends out invisible light, and then it sees how much of that light bounces back to it, kind of like when you shine a flashlight on something and it reflects back to your eyes.
If the phone detects that light coming from your face, it knows you're looking at it. It's like having a tiny version of a flashlight and an eye built into your phone.
Examples
- Invisible light bounces off your face like a tiny flashlight you can’t see.
- Imagine the phone is like a detective, sending out invisible signals to tell if you're watching it.
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See also
- How Do Smartphones Know When You're Looking at Them?
- How Do Phones Know When You're Looking at Them?
- How Do Smartphones Know When You're Looking at the Screen?
- How Do Smartphones Know When to Vibrate?
- How Do Touchscreens Know Where You Tap?
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Categories: Technology · smartphone technology· face detection· sensors· mobile devices· computer vision