Method for manufacturing liquid-crystal display device

A technology of a liquid crystal display device and a manufacturing method, which can be applied to optics, instruments, nonlinear optics, etc., and can solve problems such as the reduction of white display transmittance

Active Publication Date: 2014-05-07
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the conventional MVA-LCD, the upper part of the protrusion or the upper part of the slit becomes the boundary of the alignment division of the liquid crystal molecules, and the transmittance at the time of white display is lowered, and dark lines may be seen in the display, so there is room for improvement.

Method used

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  • Method for manufacturing liquid-crystal display device
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  • Method for manufacturing liquid-crystal display device

Examples

Experimental program
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Effect test

Embodiment approach 1

[0131]A method of manufacturing the liquid crystal display device of Embodiment 1 will be described below. The liquid crystal display device manufactured by the method for manufacturing a liquid crystal display device according to Embodiment 1 can be suitably used for TV panels, digital signage, medical monitors, electronic books, monitors for PCs, panels for tablet terminals, and mobile phone terminals. panel etc.

[0132] Before performing the photo-alignment treatment, first, a pair of substrates including a TFT substrate and a counter substrate sandwiching a liquid crystal layer are prepared. Figure 14 is a schematic plan view of the TFT substrate in Embodiment 1, Figure 15 is a schematic plan view of a counter substrate in Embodiment 1. FIG.

[0133] Such as Figure 14 As shown, as the TFT substrate, for example, a substrate in which scanning signal lines 21 , data signal lines 22 , TFT 23 , and pixel electrodes 24 are arranged on a glass substrate via an insulating ...

Embodiment approach 2

[0158] The manufacturing method of Embodiment 2 differs from Embodiment 1 in that the shape of the light-transmitting portion of the photomask used is different, but is the same as Embodiment 1 except that.

[0159] Figure 26 is a schematic plan view of a photomask (illuminance adjustment plate) used in Embodiment 2. The shapes of the sub-regions 74a, 74b constituting both ends of the light-transmitting portions 71a, 71b of the photomasks 70a, 70b will be described in detail. The outer edges of the sub-regions 74a, 74b are defined by a first straight line and a second straight line extending from both ends of the boundary line between the main regions 73a, 73b and the sub-regions 74a, 74b to the opposite side of the main regions 73a, 73b. two straight lines. The first straight line is parallel to the straight line constituting the outer edge of the main regions 73a, 73b, and the second straight line is in an oblique direction relative to the straight line constituting the o...

Embodiment approach 3

[0163] The manufacturing method of Embodiment 3 is the same as Embodiment 1 except that the shape of the light-transmitting portion of the photomask used is different from Embodiment 1.

[0164] Figure 30 is a schematic plan view of a photomask (illuminance adjustment plate) used in Embodiment 3. FIG. The shapes of the sub-regions 74a, 74b constituting both ends of the light-transmitting portions 71a, 71b of the photomasks 70a, 70b will be described in detail. The outer edges of the sub-regions 74a, 74b are composed of first curved lines and second curved lines extending from the two ends of the boundary line between the main regions 73a, 73b and the sub-regions 74a, 74b to the side opposite to the main regions 73a, 73b. curve composition. The rate of change of the first curve and the second curve follows a sinusoidal function. The first curve and the second curve intersect on a line bisecting the main areas 73a, 73b up and down. That is, the outer edges of the sub-region...

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Abstract

The present invention provides a method for manufacturing a liquid-crystal display device. Said method reduces the incidence of display irregularities in seam areas where adjacent exposure regions in a photo-alignment process to form a horizontal alignment film overlap. This method for manufacturing a liquid-crystal display device has a step wherein a horizontal alignment film is formed by means of a photo-alignment process in which a photo-alignment-film material applied to at least one of a pair of substrates is exposed to polarized light. Said exposure is performed on a plurality of regions on one substrate. Each pair of adjacent such regions has an overlap area at least 20 mm wide, and in each such overlap area, the irradiance of the polarized light to which one of the two adjacent regions is exposed decreases progressively towards the other of said two adjacent regions.

Description

technical field [0001] The present invention relates to a method for manufacturing a liquid crystal display device. More specifically, it relates to a method of manufacturing a liquid crystal display device in which a polymer layer for improving characteristics is formed on a horizontal alignment film formed by photo-alignment treatment. Background technique [0002] A liquid crystal display device (LCD: Liquid Crystal Display) is a display device that controls transmission / blocking of light (display on / off) by controlling the orientation of birefringent liquid crystal molecules. Examples of LCD display methods include vertical alignment (VA: Vertical Alignment) mode in which liquid crystal molecules having negative dielectric constant anisotropy are vertically aligned with respect to the substrate surface, and liquid crystal molecules having positive or negative dielectric constant anisotropy. The in-plane switching (IPS: In-Plane Switching) mode and the fringe field switc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337
CPCG02F1/133788G02F1/133738G02F1/133711G02F1/1368
Inventor 宫地弘一三宅敢
Owner SHARP KK
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