Pixel circuit, method for driving the same, and display panel

A pixel circuit, comprising:

• a pixel driving circuit and an ultrasonic line recognition circuit;
• wherein the pixel driving circuit and the ultrasonic line recognition circuit are coupled to a same power supply terminal, a same first control signal terminal and a same scanning signal terminal;
• the ultrasonic line recognition circuit is coupled to an ultrasonic device;
• the pixel driving circuit is coupled to a data signal terminal and a light emitting device;
• in a first stage:
• under a control of the first control signal terminal, the ultrasonic line recognition circuit provides a scanning signal of the scanning signal terminal to the ultrasonic device as an ultrasonic emission signal;
• and
• under a control of the first control signal terminal and the scanning signal terminal, the pixel driving circuit writes a reset signal of the data signal terminal and a power signal of the power supply terminal to compensate a threshold voltage;
• in a second stage:
• under the control of the first control signal terminal and the scanning signal terminal, the ultrasonic line recognition circuit outputs a line recognition signal according to a received ultrasonic signal of the ultrasonic device, and the pixel driving circuit writes a data signal of the data signal terminal;
• and
• in a third stage:
• under the control of the first control signal terminal and the scanning signal terminal, the pixel driving circuit drives the light emitting device to emit light.