Pixel circuit as well as driving method, organic light-emitting display panel and display device thereof

Abstract

The invention provides a pixel circuit as well as a driving method, an organic light-emitting display panel and a display device thereof. The pixel circuit comprises a drive control unit and a touch control unit, wherein under control of a first scanning signal and a second scanning signal, a storage capacitor charges and discharges electricity through a first level, a second level and data voltage, so that gate source voltage of a drive transistor can compensate threshold voltage of the drive transistor by controlling the drive transistor to drive an organic light emitting diode to emit light; and the touch control unit comprises a touch sensing device which is used for sensing being touched or not under control of the first scanning signal and the second scanning signal and sends a corresponding touch sensing signal to a touch signal read line. According to the pixel circuit as well as the driving method, the organic light-emitting display panel and the display device thereof, touch control can be realized while display driving is realized, and accordingly, efficient integration of display driving and touch control is realized.

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] AMOLED (Active Matrix / Organic Light Emitting Diode, Active Matrix Organic Light Emitting Diode) display is one of the hot spots in the field of flat panel display research. Organic light-emitting diodes (OLEDs) have the advantages of low energy consumption, low production cost, self-illumination, wide viewing angle and fast response speed. Pixel drive circuit design is the core technical content of AMOLED display, which has important research significance. [0003] In AMOLED displays, a stable current is required to control OLED light emission. Due to the process and device aging, the threshold voltage (Vth) of the driving transistor of each pixel in the AMOLED display will drift, which causes the current flowing through each pixel O...

AI Technical Summary

Problems solved by technology

Due to the process and device aging, the threshold voltage (Vth) of the driving transistor of each pixel in the AMOLED display will drift, which causes the current flowing through each pixel OLED to change due to the change of the threshold voltage, making Uneven display brightness, which affects the display effect of the entire image

[0004] At present, on the LCD (Liquid Crystal Display, liquid crystal display) where the touch built-in (In cell touch) technology has been applied, the most difficult technical problem to be solved by the touch built-in technology is the signal interference problem, that is, the touch electrode and the LCD need to work. There is a considerable parasitic capacitance between the electrodes, so it is difficult to overcome the problem of smoothly collecting touch signals without affecting the display characteristics of the LCD itself.

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