Plane internal switch mode active matrix liquid crystal display device and mfg. method thereof

A switch-mode and active-matrix technology, which is applied in the field of in-plane switch-mode active-matrix liquid crystal display devices and its manufacture, can solve problems such as spots on the display screen, and achieve the effect of expanding the display area and reducing the area

Inactive Publication Date: 2003-12-03
NEC LCD TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can cause speckles in the display screen

Method used

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  • Plane internal switch mode active matrix liquid crystal display device and mfg. method thereof
  • Plane internal switch mode active matrix liquid crystal display device and mfg. method thereof
  • Plane internal switch mode active matrix liquid crystal display device and mfg. method thereof

Examples

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Effect test

no. 1 example

[0060] image 3 , 4 , 5 represent the in-plane switching mode active matrix type liquid crystal display device according to the first embodiment of the present invention. image 3 is a plan view of an active matrix liquid crystal display device 10 according to a first embodiment of the present invention, Figure 4 is along image 3 The sectional view taken on line IV-IV, Figure 5 is like image 3 A circuit diagram of one pixel of the liquid crystal display device 10 is shown.

[0061] Such as Figure 4 As shown, the liquid crystal display device 10 includes: an active device substrate 11 , an opposite substrate 12 , and a liquid crystal layer 13 sandwiched between the active device substrate 11 and the opposite substrate 12 .

[0062] The opposite substrate 12 includes: an electrically insulating transparent substrate 16, a black matrix layer 17 used as a light-shielding film formed in a matrix form on the electrically insulating transparent substrate 16, formed on the ...

no. 3 example

[0179] Figure 19 is a sectional view of a liquid crystal display device 50 according to a third embodiment of the present invention.

[0180] In the liquid crystal display device 50 according to the third embodiment of the present invention, the pixel electrode 25 is made of ITO similarly to the second embodiment, and the transparent body 25a serves as a protective layer covering the data line 24 . The structure of the liquid crystal display device 50 according to the third embodiment of the present invention is the same as that of the liquid crystal display device 40 according to the above-mentioned second embodiment of the present invention except that the data line 24 is covered with the transparent body 25a.

[0181] Similar to the pixel electrode 25 , the transparent electrode 25 a is composed of ITO, and is formed simultaneously with the pixel electrode 2 . Since the transparent electrode 25a can be formed by partially changing the pattern used to form the pixel electr...

no. 4 example

[0184] Figure 20 is a sectional view of an in-plane switching mode active matrix type liquid crystal display device 60 according to a fourth embodiment of the present invention.

[0185] In the liquid crystal display device 10 according to the first embodiment of the present invention, the black matrix layer 17 is formed as a part of the opposing substrate 12, as Figure 4 shown. In contrast, the black matrix layer 17a in the liquid crystal display device 60 according to the fourth embodiment of the present invention is formed as a part of the active device substrate 11.

[0186] The black matrix layer 17a blocks the opening 27a of the common electrode 27 and is only formed above the thin film transistor 30 so that the black matrix layer 17a overlaps the thin film transistor 30, which is similar to the first embodiment. That is, the black matrix layer 17 a has a minimum size necessary for preventing light from entering the thin film transistor 30 . In addition, the black m...

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Abstract

An in-plane switching mode active matrix type liquid crystal display device includes a first substrate, a second substrate located opposing the first substrate, and a liquid crystal layer sandwiched between the first and second substrates. The first substrate includes a thin film transistor, a pixel electrode, a common electrode, a data line, a scanning line, and a common electrode line. The scanning line and the common electrode line are formed in a common layer in parallel with each other. The common electrode overlaps the data line and the scanning line with an interlayer insulating film existing therebetween. The common electrode line is singly formed at either side about the scanning line. The common electrode is electrically connected to the common electrode line through a contact hole formed throughout the interlayer insulating film, and shields a gap formed between the scanning line and the common electrode line.

Description

technical field [0001] The present invention relates to a liquid crystal display device and its manufacturing method, more specifically, the present invention relates to an in-plane switching mode active matrix liquid crystal display device and its manufacturing method. Background technique [0002] Liquid crystal display devices can be divided into two types, one type is that the molecular axis of the oriented liquid crystal molecules rotates in a plane perpendicular to the substrate displaying the image, and the other type is that the molecular axis of the oriented liquid crystal molecules rotates in a plane parallel to the In-plane rotation of the substrate showing the image. [0003] The former type of liquid crystal display device is typically a twisted nematic (TN) mode liquid crystal display device, and the latter type is called an in-plane switching (IPS) mode liquid crystal display device. [0004] Since the viewer can only view the IPS liquid crystal display devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1343G02F1/1362
CPCG02F2001/136218G02F2201/40G02F1/134363G02F1/136218G02F1/1343
Inventor 板仓州优西田真一松本公一
Owner NEC LCD TECH CORP
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