But clever app makers use it for other things as well, such as automatic collision notification, which detects when you’re in an accident and then automatically makes a call for assistance for you. The Galaxy S4 uses the accelerometer to sense the orientation of the screen and turn it to either landscape or portrait mode. As its name implies, this sensor measures acceleration and motion. So in bright light, it makes the screen brighter and easier to see: in dim light, it makes the screen dimmer, since bright light is not needed.Īccelerometer. Senses the light level and adjusts your screen’s brightness as a way to save battery power.
It does this to save power, and so you don’t accidentally touch the screen while talking and perform some unwanted task.Īmbient light sensor.
It senses when your face is close to it during a phone call and automatically turns off and blanks the touch screen as you keep talking. Have you ever noticed that when you’re talking on your S4, the screen often goes blank? That’s thanks to the proximity sensor.
GOOGLE PLAY BOOK READER VOLUME SCROLL HOW TO
(See Screen lock for details on how to set up a PIN.)
GOOGLE PLAY BOOK READER VOLUME SCROLL PASSWORD
If you’ve set up a PIN on your phone so that only someone with a password can use it, you’ll have to type in the PIN before you can use your phone. You’ll get notifications about missed calls, text messages, and so on. Your Galaxy S4 is now ready to do your bidding. Then put your fingertip on the screen and slide it to the right or left. When you again want to use the Galaxy S4, you’ll need to unlock it. You can still get phone calls and text messages, and even listen to music while the screen is locked. While the screen is locked, the Galaxy S4 still operates behind the scenes, checking email and Facebook on schedule. In fact, every time you leave the phone untouched for a certain amount of time-as little as 15 seconds to as much as 10 minutes ( Brightness)-the screen automatically locks itself. Always lock the screen before putting the Galaxy S4 in your pocket or bag to avoid accidental screen taps and potentially embarrassing unintended phone calls. It blacks out, indicating that the screen is locked.
When you put the Galaxy S4 on Standby using the Power/ Lock button, the screen stops responding to touch.
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