Working principle:
Light sensor is made up of two components (for light and light modulator), the light with a cast light device to focus the lens will be 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.
Application Introduction:
At present, light sensors are widely used in mobile phones, tablets and other devices.
The light sensor is located in the middle part of MI logo and the receiver (the same position as the distance sensor). After turning on the "automatic adjust brightness" function of the phone, when the light sensor feels the external light is strong, the screen will automatically light up, which can display good visual effect even in the outdoor.The screen darkens when the sensor senses low ambient light, save power and protect the eye.
Automatic brightness failure solution:
1. All Mi phones, Redmi phones and Mi tablets are equipped with light sensors.
2. When it is set to "automatic adjust brightness" and the screen does not change with the external light, it is suggested to do the hardware detection (*#*#64663#*#*) to check whether the light sensor is normal. Moreover, if the mobile phone's film covers the light sensor, the light sensor may fail.
