Pixel circuit, driving method thereof, display substrate and display device

Abstract

The invention discloses a pixel circuit, a driving method thereof, a display substrate and a display device, relates to the technical field of displaying, and mainly aims to solve the problem of short-term residual images caused by hysteresis effect. According to the main technical scheme, the pixel circuit comprises an initializing module, a writing-in compensating module, a luminous enabling module, a luminous device and a driving module, wherein the luminous enabling module is used for connecting the driving module with the luminous device under the control of an enabling signal end; the initializing module is used for inputting voltage of an initial voltage end to a grid electrode of a driving transistor in the driving module under the control of a resetting signal end, so that the driving module is initialized; and the writing-in compensation module is used for inputting data voltage output from the data signal end to the driving module under the control of the scanning signal endand carrying out data compensation on the driving module. The pixel circuit is mainly used for driving a luminous device to be luminous.

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, a display substrate and a display device. Background technique [0002] Organic light emitting diode display is one of the key research fields of flat panel display today. 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. [0003] The pixel circuits in OLED displays are generally driven by current, which requires a stable current to control the light emission of organic light-emitting diodes. In the prior art, such as figure 1 As shown, when the black-and-white grid image is transformed into a gray image, since the initial gate-source voltages of the driving transistors in the sub-pixels in different color grids in the OLED display device are different, the driving current of ...

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Problems solved by technology

[0003] The pixel circuits in OLED displays are generally driven by current, which requires a stable current to control the light emission of organic light-emitting diodes. In the prior art, such as figure 1 As shown, when the black-and-white grid image is transformed into a gray image, since the initial gate-source voltages of the driving transistors in the sub-pixels in different color grids in the OLED display device are different, the driving current of the light-emitting device will be different, so in In the process of transforming the black and white square image into a gray image, the graphics of the original image will be left, which will cause short-term afterimage phenomenon and seriously affect the display effect.

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