What is the light sensor in the phone and why is it needed?

Modern smartphones are equipped with a huge number of functions – for good reason they are called handheld computers. Although in fact they have even more functionality than a familiar home computer or laptop.

In some models of smartphones, several different sensors are installed at once to help the user. For example, a proximity or light sensor. We already talked about the first, we’ll talk about the second right now.

A light sensor is required to automatically adjust the brightness of the display. It captures the degree of current outdoor lighting and automatically adjusts the brightness of the smartphone screen. Not all smartphones have a light sensor, usually cheap models do without it.

Here’s what it looks like on the Samsung Galaxy Note 3:

As you can see, the sensor itself is almost invisible, but it performs an important function.

Is he really needed? In our opinion, it is needed. A simple example: you went to bed, put a smartphone next to you. You can’t fall asleep, pick up the device, turn on the screen, and it literally beams in the eyes with light – the screen seems so bright at night. If a light sensor is installed, the brightness of the display automatically decreases to a comfortable level. And if you don’t like how the light sensor works (this happens), you can just turn it off.

The sensor turns on and off simply – in the settings. So, the easiest way to do this is in the menu, which is located under the curtain – you need to check or uncheck “Auto”.

Either go to the display settings and check or uncheck the box as shown in the screenshot: