Smallest laser distance sensor for phones

The distance sensor is also called a displacement sensor. The distance sensor is usually on both sides of the handset or in the groove of the handset, which is convenient for its operation. When the user answers or makes a call, the mobile phone is placed close to the head, and the distance sensor can measure the distance between the sensors to a certain extent, and then the screen backlight is turned off, and the backlight is again illuminated when the user is removed, which is more convenient for the user to operate. Save more power.

The distance sensor principle uses a variety of elements to detect the amount of physical change of an object, and converts the amount of change into a distance to measure the distance displacement from the sensor to the object. According to different components, it is divided into optical displacement sensor, linear proximity sensor, ultrasonic displacement sensor and so on. The distance sensor used in mobile phones is a sensor that uses time to measure distance.
The infrared pulse sensor calculates the distance from the object by measuring a time by emitting a particularly short pulse of light and measuring the time from the emission of the light pulse to the reflection of the object.

Distance sensor classification
1. Optical displacement sensor (smart sensor U81 series, etc.)