Pixel circuit and display device using the same

Abstract

A pixel circuit includes four transistors, two capacitors and a light emitting element. A gate of first transistor receives a scan signal and a source/drain thereof receives a display data. A terminal of first capacitor couples to another source/drain of first transistor. A gate and a source/drain of second transistor couple to another terminal of first capacitor; and another source/drain thereof receives a switch signal. A terminal of second capacitor receives a reset signal; and another terminal thereof couples to another terminal of first capacitor. A gate of third transistor couples to a terminal of first capacitor. A gate of fourth transistor receives an enable signal; a source/drain thereof couples to a first power supply voltage; and another source/drain thereof couples to one source/drain of third transistor. The anode and cathode of the light emitting element couple to one source/drain of third transistor and a second power supply voltage, respectively.