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Laser repairing structure for liquid crystal display and its method

A technology of laser repair and thin-film transistors, which is applied to static indicators, optics, instruments, etc., can solve the problems of poor repair yield, high risk, complicated structure and method procedures, etc., and achieve the goal of reducing production costs and improving repair efficiency Effect

Active Publication Date: 2008-11-12
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, because the pixel electrode is usually composed of indium tin oxide (Indium Tin Oxide, ITO) or indium zinc oxide (Indium Zinc Oxide, IZO), it is very difficult to control the melting of the pixel electrode by laser. The structure and method of repairing line defects requires the use of low-energy lasers to melt off the volatilized part of the pixel electrodes, so it is very difficult to control
[0015] Therefore, the structure and method of this kind of laser repair line defects are complicated and risky. Furthermore, it uses the storage capacitor line as the lead wire for laser repair, and it is easy to cause a short circuit between the data line and the storage capacitor line during laser repair. So the repair yield is poor

Method used

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  • Laser repairing structure for liquid crystal display and its method
  • Laser repairing structure for liquid crystal display and its method
  • Laser repairing structure for liquid crystal display and its method

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Embodiment Construction

[0031] Figure 3A It is a schematic top view of a TFT panel pixel with a laser-repaired bright spot structure according to an embodiment of the present invention.

[0032]The data line 314 transmits the data signal to the source electrode 300, and the gate signal is transmitted through the gate line 304 of the pixel. The storage capacitor line 310 in the pixel is located at the gate electrode layer to provide a common voltage. The source electrode 300 and the drain The pole electrodes 306 partially overlap with the semiconductor electrodes 302, and the contact holes 308 are used to electrically connect the pixel electrodes 312 and the drain electrodes 306: a metal conductor 316 of the source-drain electrode layer above the storage capacitor line 310 has two Two extensions 321 and 323 can be repaired by laser when necessary; except for the extensions 321 and 323, the metal conductor 316 is located within the area of ​​the storage capacitor line 310, and the extensions 321 and 3...

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Abstract

A laser repairing structure of liquid crystal display is prepared as setting the first metal conductor with a contact hole at source-drain electrode layer in storage capacity line region and connecting said conductor with pixel electrode, extending the first metal conductor till it is overlapped with grid line of last pixel, using laser to shine them to let them be electric-connected for repairing pixel bright point.

Description

technical field [0001] The invention relates to a structure of a thin film transistor liquid crystal display panel, and in particular provides a laser repair structure and method to improve display quality. Background technique [0002] Usually, the liquid crystal of Thin Film Transistor-Liquid Crystal Display (TFT-LCD) is filled in a thin film transistor (Thin Film Transistor, TFT) substrate containing electrodes and a color filter (Color Filter, CF) containing electrodes. ) between the substrates, and the transparency of the liquid crystal to light is controlled by the voltage supplied to the electrodes. [0003] The display area of ​​a TFT (Thin Film Transistor) panel contains many pixels arranged in a matrix, and a pixel (pixel) area is surrounded by the intersection of two gate lines and two data lines. Defined by a rectangular area, in addition to the pixel electrode, the pixel also includes a thin film transistor element and a storage capacitor. The thin film transis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/133G02F1/136H01L27/04H01L27/12
Inventor 林俊安
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD