Pixel circuit and display device using the same

Abstract

A pixel circuit and a display device using the same are provided. The pixel circuit comprises first to fourth transistors, first and second capacitors and a light emitting assembly. The gate electrode of the first transistor receives a scanning signal; one source / drain electrode of the first transistor receives display data; another source / drain electrode is electrically coupled to the gate electrode of the third transistor and is electrically coupled to one source / drain electrode of the second transistor. The gate electrode and one source / drain electrode of the second transistor receive a reset signal via the second capacitor, and another source / drain electrode receives a switch signal. The gate electrode of the fourth transistor receives an enabling signal; one source / drain electrode is electrically coupled to a first power supply voltage; another source / drain electrode is electrically coupled to the anode of the light emitting assembly through the third transistor. The cathode of the light emitting assembly is electrically coupled to a second power supply voltage which is smaller than the first power supply voltage. The circuit can effectively improve the problems of nonuniform display and material decay of the light emitting assembly so as to provide high-quality display images.

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 OLED. 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 the other source / drain of...

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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