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Detection circuit and method of liquid crystal display panel, and liquid crystal display panel

A liquid crystal display panel and detection circuit technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of prolonged test time and large power consumption, so as to reduce test time, improve test efficiency, and increase test The effect of precision

Inactive Publication Date: 2009-12-09
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such an approach will lengthen the test time and also cause a large power consumption

Method used

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  • Detection circuit and method of liquid crystal display panel, and liquid crystal display panel
  • Detection circuit and method of liquid crystal display panel, and liquid crystal display panel
  • Detection circuit and method of liquid crystal display panel, and liquid crystal display panel

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Embodiment Construction

[0041] Also refer to figure 1 and figure 2 , respectively are a schematic diagram (1) and a schematic diagram (2) of an embodiment of a detection circuit of a liquid crystal display panel. The difference between the two figures is that figure 2 Will figure 1 One of the control switches 10 is shown separately for more detailed description. The detection circuit of the liquid crystal display panel proposed by the present invention is used to detect the liquid crystal display panel with a plurality of signal lines, wherein the liquid crystal display panel includes a plurality of signal lines 30, and the detection circuit includes: a control switch 10, a diode 20, and a test line 40 , a test voltage input terminal 50 and a control voltage input terminal 60 .

[0042] The control switches 10 are disposed corresponding to the plurality of signal lines 30 in the liquid crystal display panel 1 , wherein each control switch 10 has a first terminal 12 , a second terminal 14 and a ...

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PUM

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Abstract

The invention discloses a detection circuit and a detection method of an LCD panel, and the LCD panel, wherein the detection circuit comprises a plurality of control switches, each of which is provided with a first end, a second end and a third end. The first ends are respectively coupled with corresponding signal wires, and the second ends are respectively coupled with testing wires, which transmit a testing voltage; a diode comprises an anode and a cathode, wherein the cathode is coupled with the third end of each control switch, and the anode receives a control voltage and increases the voltage level of the first end of each control switch according to the control voltage and the testing voltage. Through increasing the electric potential of the signal wires by the detection circuit of the invention, the precision of the test can be increased, the testing time can be reduced and the testing efficiency can be improved.

Description

technical field [0001] The invention relates to a detection circuit and method, in particular to a detection circuit and method of a liquid crystal display panel and a liquid crystal display panel thereof. Background technique [0002] A liquid crystal display panel (LCD panel) must go through a testing procedure before it leaves the factory after being manufactured. Whether the operation of the thin film transistor (TFT) used to control the display of each pixel (pixel) in the liquid crystal display panel is normal is tested through the detection procedure. The panel detection circuit arranged around the liquid crystal display panel has different wiring methods depending on the form of the detection equipment. Now the more common detection circuit wiring methods include short ring layout and short ring layout. bar layout) two types. [0003] Traditionally, whether it is the detection circuit of ring-shaped short-circuit wiring or the detection circuit of rod-shaped short-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13G01R31/00
Inventor 陈勇志刘俊欣
Owner AU OPTRONICS CORP