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A scanning driving circuit and a liquid crystal display device

A technology of scanning driving circuit and scanning line, applied in the field of liquid crystal display device and scanning driving circuit, can solve the problems of poor function of GOA circuit, affecting product yield, open circuit, etc.

Active Publication Date: 2016-09-21
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing GOA drive circuit, due to various reasons such as poor etching and exposure, the key TFT in the GOA circuit may be at risk of open circuit or short circuit, which will cause poor functionality of the GOA circuit, and even lead to circuit failure, affecting product yield.

Method used

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  • A scanning driving circuit and a liquid crystal display device
  • A scanning driving circuit and a liquid crystal display device
  • A scanning driving circuit and a liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] figure 2 Shown is a schematic diagram of Embodiment 1 of the present invention, the pull-down sustain module 10 includes a first pull-down sustain module 600, the first pull-down sustain module 600 includes a first pull-down sustain unit 610, and drives the first pull-down sustain unit The first pull-down sustain control unit 620 of 610; the first pull-down sustain unit 610 includes a second controllable switch T42, and the scan driving circuit also includes a first pull-down sustain signal LC1 and a logic opposite to the first pull-down sustain signal LC1 The second pull-down sustain signal LC2; the first pull-down sustain control unit 620 includes a third controllable switch T51, a fourth controllable switch T53 and a fifth controllable switch T54; the input end of the second controllable switch T42 is coupled to the pull-up The output terminal of the control module 100, the output terminal of the second controllable switch T42 is coupled to the reference low level s...

Embodiment 2

[0071] Figure 6 Shown is a schematic diagram of Embodiment 2 of the present invention. Embodiment 2 is a change based on Embodiment 1. Compared with Embodiment 1, the main difference is that the shutdown unit 900 includes a sixth controllable switch T52, a thirteenth The controllable switch T62, the twenty-second controllable switch T52' and the twenty-third controllable switch T62'; the sixth controllable switch T52, the thirteenth controllable switch T62, the twenty-second controllable switch T52' and the control terminal of the twenty-third controllable switch are coupled to the output terminal of the pull-up control module, the sixth controllable switch T52, the thirteenth controllable switch T62 and the twenty-second controllable switch The output ends of T52' and the twenty-third controllable switch T62' are coupled to the reference low-level signal VSS; the input ends of the twenty-second controllable switch T52' are coupled to the first controllable switch T32 and the...

Embodiment 3

[0076] Figure 8 Shown is a schematic diagram of Embodiment 3 of the present invention. This embodiment is a change based on Embodiment 2. Compared with Embodiment 2, the main difference is that the repair module 20 includes a detection output unit 20e and a repair line VR. The unit 900 includes a sixth controllable switch T52, a thirteenth controllable switch T62, a twenty-second controllable switch T52', a twenty-third controllable switch T62', a twenty-fourth controllable switch T521' and a second Fifteen controllable switches T621'; the control terminals of the sixth controllable switch T52 and the thirteenth controllable switch T62 are coupled to the output terminal Q(N) of the pull-up control module 100, the sixth controllable switch T52 and the thirteenth controllable switch T52 The output terminal of the controllable switch T62 is coupled to the reference low level signal VSS; the input terminal of the sixth controllable switch T52 is coupled to the control terminals o...

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PUM

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Abstract

The present invention discloses a scanning driving circuit and a liquid crystal display device. The scanning driving circuit includes a repair module, a pull-up module, a pull-up control module for driving the pull-up module, a pull-down maintenance module and a reference low-level signal; when said When the pull-down maintenance module is turned off during the current scan line operation, the repair module is not turned on; when the pull-down maintenance module is turned on during the current scan line operation, the repair module is connected to the A pull-down sustaining module: during the working period of the current scan line, the reference low level signal passes through the shutdown unit, and the repair module turns off the pull-down sustaining module. The invention can effectively improve product yield.

Description

technical field [0001] The present invention relates to the display field, and more specifically, relates to a scan driving circuit and a liquid crystal display device. Background technique [0002] In the existing GOA drive circuit, due to various reasons such as poor etching and exposure, the key TFT in the GOA circuit may be open or short-circuited, which will cause poor functionality of the GOA circuit, and even lead to circuit failure, affecting product yield. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a scanning driving circuit and a liquid crystal display device which can effectively improve product yield. [0004] The purpose of the present invention is achieved through the following technical solutions: [0005] A scan driving circuit, the scan driving circuit includes a repair module, a pull-up module, a pull-up control module driving the pull-up module, a pull-down maintenance module and a refere...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/3677G09G2300/0408G09G2310/08G09G2330/08G09G2330/10G09G2330/12G11C19/28
Inventor 戴超
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD