Pixel circuit and display device using the pixel circuit

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.

Description

technical field [0001] The present invention relates to the display technology field of an organic light emitting diode, in particular to a pixel circuit of an organic light emitting diode and a display device using the pixel circuit. Background technique [0002] Each pixel circuit in an organic light emitting diode (OLED) display device generally uses two transistors and a capacitor to control the brightness performance of the organic light emitting diode. However, the circuit design of existing pixel circuits often causes the problem of uneven panel display, and figure 1 To explain it. [0003] figure 1 It is a schematic diagram of a conventional pixel circuit. Such as figure 1 As shown, the pixel circuit 100 is generally composed of two transistors 101 and 102 , a capacitor 103 and an organic light emitting diode 104 . The gate of the transistor 101 and one source / drain are suitable for receiving the scanning signal SCAN and the display data DATA respectively, and t...

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a pixel circuit, which can improve the problem of uneven panel display

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