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Driving method of pixel circuit

A technology of a pixel circuit and a driving method, which is applied in the field of driving a pixel circuit, can solve the problems of driving thin film transistor threshold voltage drift, pixel light emission brightness change and other problems.

Active Publication Date: 2020-10-23
TRULY HUIZHOU SMART DISPLAY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on this, it is necessary to provide a pixel circuit and its driving method, as well as a display device for the technical problem that the threshold voltage drift of the driving thin film transistor cannot be completely eliminated, resulting in a change in the brightness of the pixel.

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Embodiment Construction

[0026] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may ...

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Abstract

The invention relates to a pixel circuit, a driving method thereof and a display device. The pixel circuit is characterized in that a control pole of a driving thin-film transistor is connected with afirst end of a capacitor, a second end of the capacitor is connected with a first power supply terminal, a first pole of the driving thin-film transistor is connected with a first pole of a third thin-film transistor, a control pole of the third thin-film transistor is connected with a first scanning voltage terminal, the first pole of the driving thin-film transistor is further connected with afirst pole of a fourth thin-film transistor, a control pole of the fourth thin-film transistor is connected with a control voltage terminal, a second pole of the fourth thin-film transistor is connected with the first power supply terminal, a second pole of the driving thin-film transistor is connected with a first pole of a fifth thin-film transistor, a control pole of the fifth thin-film transistor is connected with the control voltage terminal, a second pole of the fifth thin-film transistor is connected with an anode of a light-emitting diode, and a cathode of the light-emitting diode is connected with a second power supply terminal. The pixel circuit eliminates the drift of threshold voltage and avoids the change in illumination brightness of pixels.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a driving method for a pixel circuit. Background technique [0002] AMOLED (Active-matrix organic light emitting diode, active-matrix organic light-emitting diode) will be affected by bias stress during normal operation, so that the threshold voltage of the driving thin film transistor will drift. By using a compensation circuit, most of the drift can be compensated, but it cannot be completely eliminated, resulting in a change in the brightness of the pixel. Contents of the invention [0003] Based on this, it is necessary to provide a pixel circuit, a driving method thereof, and a display device for the technical problem that the drift of the threshold voltage of the driving thin film transistor cannot be completely eliminated, resulting in a change in the luminance of the pixel. [0004] A pixel circuit, comprising: a first thin film transistor, a second thin film transist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3225G09G3/3266
CPCG09G3/3225G09G3/3266
Inventor 阮伟文张家朝吴锦坤胡君文谢志生苏君海李建华
Owner TRULY HUIZHOU SMART DISPLAY
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