Pixel driving circuit and display device

Abstract

The invention discloses a pixel driving circuit and a display device. Two transistors with opposite conductive characteristics are arranged, so that when a data signal is at a high level, the data signal is transmitted to a control node to charge a storage capacitor; when the data signal is at a low level, the storage capacitor is controlled to discharge so as to lower the potential of the controlnode; and in the charging stage, a luminescent device is controlled not to emit light. According to the invention, the influence of the transistor threshold voltage on the potential of the control node is improved, the phenomenon of non-uniform light emission during charging is improved, and the picture quality is improved.

Description

technical field [0001] The present application relates to the field of display technology, in particular to a pixel driving circuit and a display device. Background technique [0002] With the development of display technology, people pursue larger screens, higher resolutions, and more exciting visual effects, which undoubtedly put forward higher requirements for display panel manufacturing processes, materials, and processes. Organic light emitting diode (OLED) display device adopts self-luminous display technology, which has the advantages of wide viewing angle, high contrast ratio, low power consumption, bright colors, etc. more competitive. Existing OLED display devices basically adopt an active driving method. [0003] see Figure 1-Figure 2 ,in, figure 1 is an equivalent circuit diagram of an existing pixel driving circuit, figure 2 for figure 1 Driving timing diagram of the pixel driving circuit shown. [0004] Such as figure 1 As shown, the existing pixel ...

AI Technical Summary

Problems solved by technology

This will affect the luminescence of the light-emitting diode D1, resulting in uneven luminescence in the plane

In addition, the switch tube T2 using TFT is prone to in-plane uneven threshold voltage Vth, which will also cause uneven potential at the control node N, thereby causing in-plane uneven light emission and affecting picture quality.

[0007] Therefore, how to improve the unevenness of the potential at the control node, resulting in the phenomenon of uneven light emission in the charging stage, has become a technical problem that needs to be improved in the development of existing pixel drive circuit technology.

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