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Home > MEMS / sensing technology > The working principle of light sensor is analyzed

The working principle of light sensor is analyzed

Published time: 2020-02-18 11:05:34

A light sensor, also known as a light sensor, is a sensor that can sense the intensity of light and adjust the brightness of the screen based on the surrounding light and shade, which is widely used on mobile phones.In recent years, light sensor has been widely used in many industries.

How light sensors work

In mobile phones, for example, the light sensor is usually located in the camera before next to a small point, if in the case of light (outdoor or indoor lighting adequate), probably after 2 to 3 seconds, the keyboard will automatically go out, even if you to machine operation, the keyboard lights will not, unless the light is darker, and a keyboard light will light up automatically;If you try to cover the light sensor with your hand in the case of sufficient light, the keyboard light will automatically light up after 2-3 seconds. This is the function of the light sensor, which is to play a power-saving function.

light sensor

The light sensor automatically turns off the keyboard light when the light is strong, and slightly intensifies the brightness of the screen to save power and improve screen viewing, and automatically turns on the keyboard light when the light is low.Generally speaking, the light sensor can be adjusted to turn off in the phone's tool Settings.The advantage of light sensors is that they can adjust the brightness of the phone's screen and keyboard lights based on the light in the phone's environment.

Light sensor is made up of two components is cast by light, and light detector, with cast light will light up the lens to focus, by transfer to the lens on the light, then to the receiving sensor, receives the sensor receives the light signal into electrical signal, the telecommunication signals can be made to further more different kinds of switch and control action, its basic principle is to cast light modulator covered by the light of the light device do the action of received signal to use to complete all kinds of automation control.

The light sensor has the characteristics of wide measuring range, good linear shape, good waterproof performance, easy to use, easy to install, and long transmission distance. It is suitable for all kinds of places, especially for agricultural greenhouses and urban lighting.According to different measuring place, different measuring range.

 

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