Phone proximity sensor: what is it?

We periodically encounter proximity sensors in life, as they have found widespread use. For example, in the toilet room, proximity sensors are used in taps and dryers, which turn on as soon as you bring your hand to them. And what is a proximity sensor in a smartphone or phone?

In general, this is almost the same. Take your smartphone, dial someone’s number and hold the device to your ear – the screen will turn off. This is mainly done so that there are no random clicks on the touch buttons. But there is another reason – when talking, the on screen could drain the phone very much, especially if the user likes to talk for hours. And so the manufacturers were able to solve two problems at once with one simple device.

The proximity sensor can be checked in a different way. It is located at the top of the chassis, usually next to the speaker. When dialing, close your hand with a small window next to the speaker and the screen will go out – this proximity sensor has worked.

The sensor itself is small in size. In the photo – together with the camera module:

Such sensors are used in all modern smartphones, from iPhone to Android smartphones..

Proximity Sensor Problems

As such, there should be no problems with the indicated sensor. The main complaint may concern the incorrect operation of the proximity sensor when, for example, it does not turn off the screen when the device is brought to the face or does not turn it on after a conversation. Normally enough to calibrate the screen.

To calibrate the screen, special applications are used, which can be downloaded, including on the official website of the manufacturer. Sometimes the calibration function is already built into the firmware.

In some cases, a problem with the proximity sensor may be caused by some problem in the firmware. In this case, you should try to upgrade the device to the same or newer firmware.