Mobile phone liquid crystal display screen identification circuit

The utility model discloses a mobile phone liquid crystal display screen identification circuit, comprising a liquid crystal display screen circuit, LEDK1-LEDK5 pins of the liquid crystal display screen circuit are coupled with a collector electrode of a triode Q1, a base electrode of the triode Q1 is coupled with a PWM interface, an emitter electrode of the triode Q1 is grounded, a PWM input signal is connected with the liquid crystal display screen circuit, and the LED K1-LEDK5 pins of the liquid crystal display screen circuit are coupled with the collector electrode of the triode Q1. Backlight display of the liquid crystal display screen is controlled to be switched on and off through a triode Q1, a Y-pin, an X-pin, a Y + pin and an X + pin of the liquid crystal display screen circuit are correspondingly and electrically connected with a Y-pin, an X-pin, a Y + pin and an X + pin of an identification chip U2 respectively, and a DOUT pin of the identification chip U2 outputs signals. 本实用新型公开了一种手机液晶显示屏识别电路，包括