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Liquid crystal display device

A liquid crystal display device, liquid crystal technology, applied in the direction of instruments, nonlinear optics, optics, etc., can solve the problems of disordered orientation, low brightness, dark lines, etc.

Inactive Publication Date: 2011-04-13
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, in a VA-mode liquid crystal display device provided with an alignment film that defines a pretilt direction, a characteristic disorder of alignment occurs, and there are areas with lower luminance than the intermediate gray scale that should be displayed when viewed from the front, resulting in dark lines (for example, refer to Patent Document 5)

Method used

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Embodiment approach 1

[0109] A first embodiment of the liquid crystal display device of the present invention will be described below.

[0110] exist figure 1 A schematic diagram of a liquid crystal display device 100A of this embodiment is shown. The liquid crystal display device 100A includes an active matrix substrate 110A, a counter substrate 150 and a liquid crystal layer 180 . Active matrix substrate 110A has first alignment film 130 supported by insulating substrate 112 , and counter substrate 150 has second alignment film 170 supported by transparent insulating substrate 152 . The liquid crystal layer 180 is sandwiched between the first alignment film 130 of the active matrix substrate 110A and the second alignment film 170 of the counter substrate 150 . In addition, although in figure 1 Although not shown in the drawing, a plurality of wiring lines and pixel electrodes are provided between the insulating substrate 112 of the active matrix substrate 110A and the first alignment film 13...

Embodiment approach 2

[0193] A second embodiment of the liquid crystal display device of the present invention will be described below.

[0194] Figure 13(a) is a schematic plan view showing the structure of the active matrix substrate 110B in the liquid crystal display device 100B of the present embodiment, (b) is a schematic plan view showing dark lines generated in the liquid crystal display device 100B of the present embodiment, (c) is a schematic plan view of the liquid crystal display device 100B.

[0195] The liquid crystal display device 100B of this embodiment has the same configuration as the liquid crystal display device 100A, and redundant descriptions are omitted. In addition, the liquid crystal display device 100B is different from the liquid crystal display device 100A in that dark lines are generated in an inverted swastika shape.

[0196] exist Figure 13 (a) The second sub-pixel SP-B of the pixel in the mth row and the first sub-pixel SP-A of the pixel in the m+1th row are sho...

Embodiment approach 3

[0229] A third embodiment of the liquid crystal display device of the present invention will be described below.

[0230] Figure 22 (a) is a schematic plan view showing the structure of the active matrix substrate 110C of the liquid crystal display device 100C of the present embodiment, Figure 22 (b) is a schematic plan view showing dark lines generated in the liquid crystal display device 100C of the present embodiment. Figure 22 (c) and Figure 22 (d) is a schematic plan view of the liquid crystal display device 100C. Figure 22 (c) shows the positions of dark lines generated in the liquid crystal display device 100C and ribs or slits (openings) provided in the counter electrode. Figure 22 (d) shows the pattern of the black matrix BM.

[0231] The liquid crystal display device 100C of this embodiment has the same configuration as the liquid crystal display devices 100A and 100B, and redundant descriptions are omitted. In addition, the liquid crystal display device 1...

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Abstract

A liquid crystal device (100A) including a cutout portion (122a2) corresponding to a part of a wiring is provided at a pixel electrode (121). Out of a liquid crystal layer (180) viewed from an observer side, a standard alignment direction is defined as an azimuth angle component of a liquid crystal molecule (182) substantially at the center in the thickness direction of the liquid crystal layer (180) in a region where an alignment region of a first alignment layer (130) and an alignment region of a second alignment layer (170) are overlapped. At the voltage applying time, a slant electric field is formed by a counter electrode (160) and the cutout portion (122a2) of the pixel electrode (121), so that the azimuth component of the liquid crystal molecule (182) in a region corresponding to at least one of the cutout portion (122a2) of the pixel electrode (121) out of the liquid crystal layer (180) intersects the standard alignment direction at an angle equal to or less than 90 .

Description

technical field [0001] The present invention relates to a liquid crystal display device. Background technique [0002] Liquid crystal display devices are characterized by thinness and low power consumption, and are widely used in various fields. In particular, an active-matrix liquid crystal display device in which a switching element (such as a thin film transistor) is provided for each pixel has high contrast, good response characteristics, and high performance, so it is used in televisions, monitors, and notebook computers. , in recent years, its market size is expanding. [0003] The active matrix type liquid crystal display device includes an active matrix substrate on which a plurality of switching elements are formed and a counter substrate facing the active matrix substrate, and displays by controlling the light transmittance of a liquid crystal layer sandwiched between them . The active matrix substrate is produced by repeating the steps of depositing a semicondu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1343G02F1/1337
CPCG02F1/133707G02F1/133753G02F2001/134345G02F1/134345
Inventor 平户伸一
Owner SHARP KK
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