US Patent 11164494 Pixel circuit, display device and detecting method

A pixel circuit is provided. The pixel circuit includes a first transistor, a second transistor, a third transistor, and a light emitting unit. The second transistor is coupled to the first transistor. The third transistor is coupled to the second transistor. The light emitting unit is coupled to the first transistor. When the first transistor is turned off, a current of a node between the third transistor and the first transistor is detected.