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Pixel driving circuit and liquid crystal display device

A pixel drive circuit and drive transistor technology, applied in static indicators, instruments, etc., can solve problems such as pixel drive circuit brightness differences, organic light-emitting diodes’ unstable light emission, and reduced display quality, so as to improve uniformity and display quality , The effect of compensating the drift of the threshold voltage

Inactive Publication Date: 2018-03-06
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

The threshold voltage of the driving thin film transistor will drift with the working time, which will lead to the unstable light emission of the organic light emitting diode, cause the brightness difference of the pixel driving circuit, and reduce the display quality

Method used

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  • Pixel driving circuit and liquid crystal display device
  • Pixel driving circuit and liquid crystal display device
  • Pixel driving circuit and liquid crystal display device

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terminology used ...

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Abstract

The embodiment of the invention discloses a pixel driving circuit and a liquid crystal display device. The pixel driving circuit uses a 6T2C structure and includes a scanning switch tube (T1), a firstreset switch tube (T2), a second reset switch tube (T3), and a third reset switch (T4), a control switch tube (T5), a driving transistor (T6), an OLED, a storage capacitor (C1) and a coupling capacitor (C2). The pixel driving circuit can offset the drift of the threshold voltage of a driving thin film transistor, thereby improving the uniformity of the OLED display frames and improving display quality.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel driving circuit and a liquid crystal display device. Background technique [0002] An organic light emitting diode (OLED) display device has the advantages of low power consumption, high color gamut, high brightness, high resolution, wide viewing angle, and high response speed. OLED display devices can be classified into two types according to driving methods: passive matrix OLED (passive matrix OLED, PMOLED) and active matrix OLED (active matrix OLED, AMOLED). Among them, AMOLED has pixels arranged in an array, belongs to the active display type, has high luminous efficiency, and is usually used as a high-definition large-size display device. [0003] AMOLED is a current-driven device. When a current flows through the OLED, the OLED emits light, and the brightness of the light is determined by the current flowing through the OLED itself. Most existing integrated circu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3208G09G3/36
CPCG09G3/3208G09G3/36G09G3/3233G09G2300/0819G09G2300/0861G09G2320/045G09G2300/0852G09G2310/08G09G2320/0233G09G3/3258G09G3/3696G09G2300/0842
Inventor 侯学顺李雪
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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