Pixel driving circuit, driving method, and organic light-emitting display panel

Abstract

The present invention describes a pixel driving circuit, a driving method, and an organic light-emitting display panel. The pixel driving circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor and a capacitor. A first node is arranged between the fourth transistor and the fifth transistor. The seventh transistor is coupled in series between a reference voltage line and the first node. The eighth transistor is coupled in series between the reference voltage line and the anode of a light-emitting element. According to the invention, the pixel driving circuit solves the display unevenness problem caused by the reasons of threshold voltage drift, device degradation and the like in the prior art. Meanwhile, the grid potential stability of a driving transistor, under the influence of a leakage current generated due to the fact that the voltage difference between the two ends of a switching transistor is relatively large in the prior art, can be improved at the same time.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel driving circuit, a driving method and an organic light-emitting display panel. Background technique [0002] In display technology, organic light emitting diode display (Organic Light Emitting Diode, OLED) is widely used in the industry due to its thinness, active light emission, fast response speed, wide viewing angle, rich color and high brightness, low power consumption, and high and low temperature resistance. It is recognized as the third-generation display technology after Liquid Crystal Display (LCD). [0003] At present, OLED displays are mainly current-controlled light emitting, and the uniformity of light emitting is controlled by the corresponding current. However, since the threshold voltage of the drive transistor of each pixel of the OLED display tends to drift with time, the current flowing through the OLED deviates under the same data signal, res...

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Problems solved by technology

[0004] In view of this, the present invention provides a pixel driving circuit, a driving method and an organic light-emitting display panel to solve the problem of uneven display caused by threshold voltage drift and device degradation in the prior art.

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