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Liquid crystal display substrate and method of repairing the same

A liquid crystal display, substrate technology, applied in static indicators, nonlinear optics, instruments, etc., can solve problems such as impossible to reduce parasitic capacitance

Inactive Publication Date: 2006-01-04
NEC LCD TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, it is impossible to reduce the parasitic capacitance

Method used

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  • Liquid crystal display substrate and method of repairing the same
  • Liquid crystal display substrate and method of repairing the same
  • Liquid crystal display substrate and method of repairing the same

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Embodiment Construction

[0046] The invention will now be described herein with reference to illustrative embodiments. Those skilled in the art will recognize that many alternative embodiments can be accomplished using the teachings of the invention and that the invention is not limited to the embodiments described for explanatory purposes.

[0047] In existing LCDs, disconnection tends to occur on the bus lines of the upper layer, especially the drain bus lines formed on the upper layer. In an LCD, when a disconnection occurs on a drain bus line for one pixel among pixels arranged in a matrix, the subsequent pixel produces a defective display and thereby lowers the productivity of the LCD. Therefore, the light shielding conductive film formed on the same layer as the gate bus line for shielding light around the transparent pixel electrode serves as a repair line for repairing a disconnection on the drain bus line. In addition, when disconnection occurs on the drain bus line, an alternative path can ...

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Abstract

A liquid crystal display substrates includes a structure in which a light-shielding conductive film is formed on the same layer as gate bus lines in a space between a drain bus line and a transparent pixel electrode. A plurality of protrusions are formed on the drain bus line so as to protrude toward the light-shielding conductive film. Moreover, the light-shielding conductive film is formed to overlap the drain bus line only at the protrusions. When disconnection occurs on the drain bus line, the protrusions are welded and connected to the light-shielding conductive film by irradiating a laser beam onto the protrusions located on both sides of a disconnected portion so as to form an alternative path.

Description

technical field [0001] The invention relates to a substrate of a liquid crystal display device and a repair method thereof. More particularly, the present invention relates to a structure allowing repair of a disconnection of a line formed on a thin film transistor (TFT) substrate and a repair method thereof. Background technique [0002] As display devices for audio-visual (AV) machines and office automation (OA) machines, liquid crystal display devices (LCDs) have been widely used due to their advantages including thin thickness, light weight, low power consumption, and the like. [0003] In addition, among various LCDs, active matrix type LCDs employing thin film transistors (TFTs) as switching elements have been widely used. [0004] The active matrix type LCD sandwiches liquid crystals between a substrate including a switching element such as a TFT (hereinafter the substrate will be referred to as a TFT substrate) and an opposing substrate including a color filter, a b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/136G02F1/133G02F1/1362
CPCG02F1/136259G02F1/136209G02F2001/136272G02F1/136272
Inventor 樱井洋木村茂
Owner NEC LCD TECH CORP