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

Abstract

The invention discloses a pixel driving circuit, a driving method, a display panel and a display device. In the pixel driving circuit, a first end of a driving module is used for inputting signals output by a first power supply, a first light-emitting control module is connected between a second end of the driving module and a first end of a light-emitting module, and a second end of the light-emitting module is connected with a second power supply; a first end of a first storage module is connected with a control end of the driving module, a second end of the first storage module is connected with a first end of a second storage module, and a second end of the second storage module is connected with the first end of the light-emitting module; a threshold detection module is connected with the second end of the first storage module and the second end of the driving module, and can control the first storage module to store threshold voltage of the driving module; a data writing module is connected with the second end of the driving module; and an initialization module is connected with the control end of the driving module and the first end of the light-emitting module. According to the technical scheme provided by the invention, compensation for threshold voltage can be enhanced, and brightness deviation of a display panel is reduced.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel driving circuit, a driving method, a display panel and a display device. Background technique [0002] A pixel driving circuit in an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display realizes a display function by controlling a driving current flowing through the OLED through a driving transistor. The magnitude of the driving current is related to the characteristic parameters of the driving transistor including the threshold voltage. [0003] In the current driving process of the driving transistor, the threshold voltage is applied to the gate of the driving transistor during the data voltage writing period, so as to realize compensation for the threshold voltage. However, the existing drive transistors, especially the drive transistors that use Indium Gallium Zinc Oxide (IGZO) as the channel layer material, have different threshold volt...

AI Technical Summary

Problems solved by technology

However, the existing drive transistors, especially the drive transistors that use Indium Gallium Zinc Oxide (IGZO) as the channel layer material, have different threshold voltages for compensation under different data voltages, so that the drive transistor transmits The current has a certain difference, resulting in a certain deviation in the display brightness of the display panel

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