Display device, pixel driving circuit and driving method of display device

Abstract

The invention provides a display device, a pixel driving circuit and a driving method of the display device. According to the invention, a data voltage is supplied to a first electrode of a driving transistor and a storage sub-circuit is charged or discharged. In this way, the voltage difference between a first node and a control electrode of the driving transistor is kept stable when a control electrode of the driving transistor is in a floating connection state. After that, a first voltage signal of a first voltage end is supplied to the control electrode of the driving transistor, and a second voltage signal of a second voltage end or a third voltage signal of a third voltage end is supplied to the first node. A data voltage and a threshold voltage of the driving transistor are writteninto the control electrode of the driving transistor. A second electrode of the driving transistor and a first end of a light-emitting element are turned on. Under the control of a second light-emitting control signal end, the first electrode and the third voltage end of the driving transistor are turned on so as to control a light emitting element to emit the light. In this way, the problem in the prior art that an OLED display picture is abnormal due to the fluctuation of the opening voltage of the transistor is solved in the prior art.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel driving circuit, a display device and a driving method of the pixel driving circuit. Background technique [0002] In recent years, the demand for Organic Light-Emitting Diode (OLED) has been increasing, especially the large-scale applications such as small-size flexible curved screens and curved TVs have attracted more and more attention from the display industry. [0003] Compared with other displays, OLED display devices have a broad market because of their advantages such as self-illumination, full-color display, wide viewing angle, high brightness, high contrast ratio and low power consumption. However, the problem with the related technology is that the traditional 2T1C circuit simply converts the voltage signal into a current signal, without considering the fluctuation of the turn-on voltage of the transistor due to the influence of the process fluctuation...

AI Technical Summary

Problems solved by technology

However, the problem with the related technology is that the traditional 2T1C circuit simply converts the voltage signal into a current signal, without considering the fluctuation of the turn-on voltage of the transistor due to the influence of the process fluctuation during the production process, resulting in obvious spots on the OLED display screen , Mura and other picture quality appears, affecting the display quality of the product

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