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GOA circuit and display device

A circuit and low-voltage technology, which is applied in the display field, can solve the problems of signal lines occupying space, increasing the number of signals, etc.

Pending Publication Date: 2019-07-02
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

IGZO (indium gallium zinc oxide), that is, indium gallium zinc oxide, has high mobility and good device stability, and is currently widely used in display panels. However, the circuit design of IGZO-GOA is relatively complicated, and thin film transistors (thin film The number of transistors, TFT) is large, which is not conducive to the narrow frame of the display panel, which is inconsistent with the original design intention of the GOA circuit
The demultiplexer (Demux) GOA circuit is a method that can realize the narrow border of the GOA circuit. However, the current Demux GOA circuit needs to add multiple sets of clock signal sources with different pulse widths and amplitudes. Therefore, although the overall GOA circuit is reduced The space occupied by the layout, but the number of signals is greatly increased, and the new signal lines also occupy a large part of the space

Method used

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Embodiment Construction

[0026] In order to make the above and other objects, features, and advantages of the present invention more comprehensible, preferred embodiments of the present invention will be exemplified below and described in detail in conjunction with the accompanying drawings. Furthermore, the direction terms mentioned in the present invention, such as up, down, top, bottom, front, back, left, right, inner, outer, side layer, surrounding, central, horizontal, transverse, vertical, longitudinal, axial , radial direction, the uppermost layer or the lowermost layer, etc., are only directions for referring to the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, but not to limit the present invention.

[0027] In the figures, structurally similar units are denoted by the same reference numerals.

[0028] refer to figure 1 and figure 2 , the GOA circuit of an embodiment of the present invention includes twenty thin film ...

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Abstract

The invention provides a GOA circuit and a display device. The GOA circuit comprises a plurality of cascaded GOA circuit units. The nth GOA unit responsible for outputting an nth horizontal scanning signal comprises a pull-up unit, a pull-up control unit, a download unit, a pull-down unit, a pull-down maintaining unit and a bootstrap capacitor. And the pull-up unit is connected with the nth levelof horizontal scanning signal output end and a group of clock signals. The n GOA unit can drive three rows of scanning lines, a group of clock signals are used, the number of required thin film transistors is small, the number of required signal lines is small, and a narrow frame of the GOA circuit is achieved.

Description

[0001] 【Technical field】 [0002] The invention relates to the field of display technology, in particular to a GOA (gate driver on array) circuit and a display device. [0003] 【Background technique】 [0004] At present, the driving of the horizontal scanning lines of the display panel is realized by an external integrated circuit (IC), which can control the step-by-step opening of the horizontal scanning lines of each level, and the GOA (gate driveron array) technology is adopted, that is, The array substrate row driving technology can integrate the row scanning driving circuit on the substrate of the display panel, which can reduce the number of external integrated circuits, thereby reducing the production cost of the display panel, and can realize the narrow frame of the display device. IGZO (indium gallium zinc oxide), that is, indium gallium zinc oxide, has high mobility and good device stability, and is currently widely used in display panels. However, the circuit design ...

Claims

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Application Information

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IPC IPC(8): G09G3/20G09G3/3266G09G3/36
CPCG09G3/20G09G3/3266G09G3/3677G09G3/3696
Inventor 薛炎
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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