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Pixel drive circuit and drive method, array substrate and display unit thereof

A technology for pixel driving circuits and driving transistors, which can be applied to circuits, electrical components, static indicators, etc.

Active Publication Date: 2014-08-13
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It drives OLED to emit light, where the formula for driving current is I OLED =K(V GS -V th ) 2 , where V GS is the voltage between the gate and source of the driving transistor, V th is the threshold voltage of the drive transistor, due to reasons such as process and device aging, the threshold voltage of the drive TFT (V th ) has non-uniformity, and there is non-uniformity in the threshold voltage of the driving TFT (that is, T2 in the figure) of each pixel, which causes the current flowing through each pixel OLED to change, thereby affecting the display effect of the entire image

Method used

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  • Pixel drive circuit and drive method, array substrate and display unit thereof
  • Pixel drive circuit and drive method, array substrate and display unit thereof
  • Pixel drive circuit and drive method, array substrate and display unit thereof

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Embodiment Construction

[0031] 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 only some, not all, embodiments of the present invention. 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.

[0032] The switching transistors and driving transistors used in all embodiments of the present invention can be thin film transistors or field effect transistors or other devices with the same characteristics. Since the source and drain of the switching transistors used here are symmetrical, the source, Drains are interchangeable. In the embodiment of the present invention, in order to distinguish the two poles of the transistor except the gate, one pole is c...

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Abstract

Embodiments of the present invention provide a pixel driving circuit and its driving method, an array substrate, and a display device, which relate to the field of display technology and can avoid the influence of the drift of the threshold voltage of the driving transistor on the driving current of the active light-emitting device. The pixel driving circuit includes: a data line, a first scanning line, a signal control line, a light emitting device, a storage capacitor, a driving transistor and four switching transistors. Embodiments of the present invention are used in display manufacturing.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel driving circuit and a driving method thereof, an array substrate and a display device. Background technique [0002] Active Matrix / Organic Light Emitting Diode (AMOLED) display is one of the hotspots in the field of flat panel display research today. Compared with liquid crystal displays, OLED has low energy consumption, low production cost, self-luminescence, With the advantages of wide viewing angle and fast response speed, OLEDs have begun to replace traditional LCD displays in display fields such as mobile phones, PDAs (handheld computers), and digital cameras. Pixel drive circuit design is the core technical content of AMOLED display, which has important research significance. [0003] Unlike TFT-LCD (Thin Film Transistor Liquid Crystal Display, Thin Film Field Effect Transistor Liquid Crystal Display), which uses a stable voltage to control brightness, OLE...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G02F1/133G02F1/1368H01L27/32H01L27/12
CPCG09G3/32G09G3/30G09G3/3258G09G3/3233G09G2300/0819G09G2300/0842G09G2300/0861G09G2310/0251G09G2310/0262G09G2320/045
Inventor 杨盛际吴俊纬王海生刘英明
Owner BOE TECH GRP CO LTD