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

A technology of pixel driving circuit and light-emitting signal, applied in circuits, electrical components, static indicators, etc., can solve the problem of uneven display, and achieve the effect of improving leakage current.

Active Publication Date: 2017-05-24
WUHAN TIANMA MICRO ELECTRONICS CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment Construction

[0022] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] It should be noted that in the following description, specific details are set forth in order to fully understand the present invention. However, the present invention can be implemented in many other ways than those described here, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Accordingly, the present invention is not limited to the specific embodiments disclosed below.

[0024] Please refer to Figure 1A , Figure 1A It is a pixel driving circuit diagram provided by the prior art, Figure 1B yes Figure 1A Driving timing diagram of the pixel driving circuit shown. Such as Figure 1A As shown, the pixel driving circuit includes a first transistor K1, a second trans...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3258G09G3/3266
CPCG09G3/3258G09G3/3266G09G2300/0861G09G2310/0262G09G2320/043G09G3/3233G09G2300/0819H10K59/40H01L27/1251H01L29/78696H01L29/78645H10K59/131H10K59/1213H10K59/1216G06F3/041G06F2203/04103G09G3/3275G09G2300/0426G09G2320/0204
Inventor 向东旭李玥钱栋刘刚朱仁远吴桐陈泽源
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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