Pixel driving circuit, array substrate and display device

Abstract

The embodiment of the invention discloses a pixel driving circuit, an array substrate and a display device, and relates to the technical field of display devices. The threshold voltage of a driving transistor is compensated, so that the ununiformity problem of threshold voltage is solved, and the display effect of the display device is improved. The pixel driving circuit according to the embodiment of the invention comprises a driving transistor and an organic light emitting diode, and the pixel driving circuit further comprises a charging compensation module and a light emitting control module, wherein the charging compensation module is used for receiving data voltage signals under the control of scanning voltage signals, charging the driving transistor and compensating the threshold voltage of the driving transistor; and the light emitting control module is used for receiving a reference voltage and a power supply voltage under the control of light emitting control signals and controlling the organic light emitting diode to emit light.

Description

technical field [0001] The present invention relates to the technical field of display devices, in particular to a pixel driving circuit, an array substrate and a display device. Background technique [0002] With the continuous advancement of technology, OLED (English: Organic Light-Emitting Diode, Chinese: Organic Light-Emitting Diode), as a light-emitting device, is more and more well-known and widely used in high-performance display devices. OLED has broad application prospects due to its advantages such as simple process preparation, high luminous brightness, fast response speed, low cost, and moderate working temperature. [0003] According to different driving methods, OLED can be divided into two types: passive matrix drive (English: Passive Matrix Organic Light Emission Display, abbreviation: PMOLED) and active matrix drive (English: Active Matrix Organic Light Emission Display, abbreviation: AMOLED). . The passive matrix driving process is simple and the cost is ...

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Problems solved by technology

[0005] However, during the research and development process, the inventors found that the prior art has at least the following defects: due to process limitations or drift phenomena caused by long-term pressurization and high temperature, the threshold voltage Vthn of each drive transistor in the prior art pixel drive circuit is different, resulting in The overdrive voltage of each driving transistor is inconsistent, and the non-uniformity of the threshold voltage will eventually lead to differences in the display brightness of the display device

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