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

Abstract

The present invention provides a pixel driving circuit, a driving method, a display substrate and a display device. The pixel driving circuit comprises N pixel driving units connected with the same data cable, wherein N is an integer greater than 1, and the n-th pixel driving unit is used for driving a light emitting element in an n-th pixel unit to emit light, wherein n is a positive integer smaller than or equal to N; and the n-th pixel driving unit includes an n-th reset module, an n-th driving transistor, an n-th charging / discharging module, an n-th compensation control module and an n-th light emission control module. With the pixel driving circuit of the present invention adopted, the number of transistors used for compensation and the number of data cables used for compensation can be decreased, the number of pixels per inch (PPI) can be high, current flowing through each light-emitting element is not affected by the threshold voltage of driving transistors, and the uniformity of image display can be ensured.

Description

technical field [0001] The present invention relates to the technical field of display driving, in particular to a pixel driving circuit, a driving method, a display substrate and a display device. Background technique [0002] In the existing pixel driving circuit, one data line Data only provides the data voltage for displaying a row of pixel driving units, so the number of TFT (Thin Film Transistor, thin film transistor) devices and data lines used for compensation cannot be adjusted. Effectively reduced, so that it is impossible to greatly reduce the size of Pixel Pitch (pixel pitch) and reduce the cost of IC (Integrated Circuit, integrated circuit), which leads to the inability to free more data lines to liberate the number of IC channels (channels). Higher PPI (pixels per inch, the number of pixels per inch) also solves the problem of uneven display caused by uneven threshold voltage of pixel driving TFT due to process and long-term operation. Contents of the inventi...

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a pixel driving circuit, a driving method, a display substrate, and a display device, so as to solve the problem in the prior art that one data line only provides a display data voltage for one column of pixel driving units, thus the TFT used for compensation The number of data lines cannot be effectively reduced, so that the size of the pixel pitch cannot be greatly reduced and the cost of the IC can be reduced, which leads to the inability to free up more data lines to liberate the number of IC channels, and cannot obtain higher PPI at the same time Complete the problem of pixel compensation drive

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