Pixel circuit, drive method thereof, an 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. A display control module and a fingerprint identification module are arranged. A first scanning line, a second canning line, a control line, a data line, a second signal source, a third signal source and the anode of an organic light-emitting diode are connected with the display control module. The display control module is used for enabling a light-emitting drive signal of the organic light-emitting diode to be independent of the threshold voltage of the drive transistor under the control of a first scanning signal, a second scanning signal and a control signal. The fingerprint identification module is connected with the first scanning line, the second scanning line, a fourth signal source and a signal reading line. The fingerprint identification module is used for achieving fingerprint identification function and the touch detecting function under the control of the first scanning signal and the second scanning signal. By the adoption of the display control module and the fingerprint identification module, the evenness of the luminance of the display panel can be improved, the image display effect of the display device can be improved, and efficient integration of display drive, fingerprint identification and touch detection is achieved.

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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