Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Liquid crystal display apparatus and method of restoring defected pixel

A liquid crystal display device, pixel electrode technology, applied in static indicators, nonlinear optics, instruments, etc., can solve problems such as defects, short-circuit bright spots or lines of pixel electrodes, etc. Effect

Inactive Publication Date: 2007-11-21
MITSUBISHI ELECTRIC CORP
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a possibility that the rolling of the conductive metal or the floating of the conductive metal lump may short-circuit between the pixel electrode and the counter electrode, thereby causing bright spots or line defects.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Liquid crystal display apparatus and method of restoring defected pixel
  • Liquid crystal display apparatus and method of restoring defected pixel
  • Liquid crystal display apparatus and method of restoring defected pixel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0022] 1( a ), ( b ) show a plan view and a cross-sectional view of a liquid crystal display device according to this embodiment. Wherein, Fig. 1(a) shows a plan view of a pixel portion of the array substrate, and Fig. 1(b) shows a cross-sectional view along A-A' of Fig. 1(a). The liquid crystal display device of this embodiment has a structure in which pixels are arranged in a matrix, and each pixel is driven by a thin film transistor (TFT) which is a thin film active element.

[0023] In the liquid crystal display device of this embodiment, as shown in FIGS. An insulating film 9 is provided in two layers, and an amorphous silicon (a-Si) film 10 as a semiconductor active film is provided in a third layer. Furthermore, in the liquid crystal display device of this embodiment, the source wiring 3, the source electrode 4, and the drain electrode 5 are provided in the fourth layer, the insulating film 9 is provided in the fifth layer, and finally the pixel electrode 6 is provided...

Embodiment approach 2

[0034] FIG. 3 is an enlarged view showing a TFT of the liquid crystal display device of the present embodiment. In FIG. 3 , a hole 16 is provided on the drain electrode 5 at a position where the gate electrode 2 and the drain electrode 5 planarly overlap each other. The hole 16 provided may have any shape as long as it is located at a position where the gate electrode 2 and the drain electrode 5 planarly overlap each other. In addition, in the present embodiment, the hole 15 is not provided on the gate electrode 2 .

[0035] In addition, in this embodiment, since the hole 15 is not opened in the gate electrode 2, the position of the hole 16 provided in the drain electrode 5 cannot be confirmed from the glass substrate side. Therefore, when a bright spot defect caused by a malfunction of the TFT occurs, as shown in FIG. The hole 16 is used to determine the irradiation position of the laser light 14 .

[0036] However, compared with the case where the gate electrode 2 and the...

Embodiment approach 3

[0039] The structure of the liquid crystal display device of Embodiment 1 is such that, as shown in FIG. 2 , a hole 15 is provided in the gate electrode 2 at a position where the gate electrode 2 and the drain electrode 5 planarly overlap each other. On the other hand, the structure of the liquid crystal display device according to the second embodiment is such that, as shown in FIG. 3 , hole 16 is provided in drain electrode 5 at a position where gate electrode 2 and drain electrode 5 planarly overlap each other.

[0040] The liquid crystal display device of this embodiment employs a combination of Embodiment 1 and Embodiment 2. That is, the structure of the liquid crystal display device of the present embodiment is: the hole 15 is provided on the gate electrode 2 at the position where the gate electrode 2 and the drain electrode 5 planarly overlap each other, and the hole 15 is provided at the position where the gate electrode 2 and the drain electrode 5 planarly overlap each...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a liquid crystal display device which has clear irradiation positions of laser beams, has a shape of gate electrode or drain electrode assuring the reliable repair and can suppress rolling-up of conductive metal or scattering of metal lump, and to provide a method of restoring defective pixel of the liquid crystal display device. The liquid crystal display device comprises: a plurality of gate lines 1; a plurality of source lines 3 formed so as to substantially orthogonal to the gate lines 1; pixel electrodes 6 formed in a matrix shape every intersection parts between the gate lines 1 and the source lines 3; gate electrodes 2 connected to the gate lines 1; source electrodes 4 connected to the source lines 3; drain electrodes 5 connected to the pixel electrodes 6; and TFTs formed correspondingly to respective pixel electrodes 6. Therein, the TFTs are provided with holes 15, 16 on at least one of the gate electrodes 2 and the drain electrodes 5 on the position where the gate electrodes 2 and the drain electrodes 5 are planarly superimposed on each other.

Description

technical field [0001] The present invention relates to a liquid crystal display device and a method for repairing defective pixels thereof, in particular to a liquid crystal display device and a method for repairing defective pixels thereof capable of repairing defective pixels caused by a malfunction of a thin film active element. Background technique [0002] A general method of manufacturing a liquid crystal display device including a thin film transistor (hereinafter also referred to as TFT) is as follows. First, a gate wiring and a gate electrode are formed on a glass substrate (transparent insulating substrate), and an insulating film is formed thereon. Furthermore, an amorphous silicon (a-Si) film as a semiconductor active film is formed on the insulating film. Then, a source wiring, a source electrode, and a drain electrode are formed on the amorphous silicon film, an insulating film is laminated thereon, and finally a pixel electrode is forme...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1362G02F1/13G09G3/36
CPCG02F1/136259G02F1/1368G02F2001/136268G02F1/136268G02F1/136G02F1/1343
Inventor 山下真司
Owner MITSUBISHI ELECTRIC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com