Pixel circuit, drive method of pixel circuit, organic light-emitting display panel and display device

Abstract

The invention provides a pixel circuit, a drive method of the pixel circuit, an organic light-emitting display panel and a display device. The pixel circuit comprises a display drive module and a light touch control detection module, wherein the display drive module is used for carrying out drive transistor threshold voltage compensation processing by means of data signals input through a data line and first signals input from a first signal source under control of first scanning signals input through a first scanning line, second scanning signals input through a second scanning line and control signals input through a control line within a time cycle, so that in the fourth stage of the time cycle, light-emitting drive signals of the organic light-emitting display panel has nothing to do with drive transistor threshold voltage; the light touch control detection module is used for detecting touch signals of a touch screen on the basis of light ray changes caused by touch operations under control of the first scanning signals and the control signals within a time cycle. Accordingly, the image display effect of the display device is improved, and display drive and touch detection are effectively integrated.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit and a driving method thereof, an organic light-emitting display panel and a display device. Background technique [0002] Organic light-emitting display (AMOLED) is one of the hotspots in the field of flat panel display research. Compared with liquid crystal display, organic light-emitting diode (OLED) has the advantages of low energy consumption, low production cost, self-illumination, wide viewing angle and fast response speed. , OLED has begun to replace the traditional liquid crystal display (LCD) in display fields such as mobile phones, PDAs, and digital cameras. Pixel drive circuit design is the core technical content of AMOLED display, which has important research significance. [0003] Unlike TFT-LCD, which uses a stable voltage to control brightness, OLED is current-driven and requires a stable current to control light emission. Due to the proc...

AI Technical Summary

Problems solved by technology

Due to the process and device aging, the threshold voltage (Vth) of the driving thin film transistor of each pixel will drift, which will cause the current flowing through each pixel OLED to change due to the change of the threshold voltage, making the display brightness not stable. uniform, thus affecting the display effect of the entire image

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