Liquid crystal alignment agent and liquid crystal panel

A liquid crystal aligning agent, liquid crystal panel technology, applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of easy generation of afterimages and color spots, display area afterimages, color spots, etc. The generation of color spots and the reduction of contrast, the effects of excellent thermal stability and solvent solubility

Active Publication Date: 2020-02-21
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, liquid crystal panels that include alignment films using these compounds sometimes cause afterimages and color spots in the display area
In particular, if the LCD panel is placed in a high temperature environment, it tends to produce residual image and color spots more easily

Method used

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  • Liquid crystal alignment agent and liquid crystal panel
  • Liquid crystal alignment agent and liquid crystal panel
  • Liquid crystal alignment agent and liquid crystal panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0056] [Liquid crystal alignment agent]

[0057]One aspect of the present invention may be a liquid crystal aligning agent including a copolymer and a solvent including a structure represented by the following chemical formula (1). The liquid crystal aligning agent is a polymer composition capable of forming a film having a function of controlling the orientation of adjacent liquid crystal molecules when formed into a film. In addition, in this specification, * shown in a chemical formula represents the bonding position with a copolymer. In addition, ** shown in the chemical formula means Y 1 or Y 2 with side chains (R 1 or R 2 ) bonding position.

[0058] [chemical 11]

[0059]

[0060] (In the formula, X is any one of the structures represented by the following chemical formulas (X-1-1) to (X-1-9), or by the following chemical formulas (X-2-1) to (X- Any one of the structures shown in 2-4).

[0061] Y 1 It is any one of the structures represented by the following...

Embodiment approach 2

[0138] [LCD panel]

[0139] Below, use figure 1 The configuration of the liquid crystal panel of Embodiment 2 will be described. figure 1 It is a cross-sectional view schematically showing an example of the liquid crystal panel of the second embodiment. Such as figure 1 As shown, the liquid crystal panel 100 includes a pair of substrates 10 and 20, a liquid crystal layer 30 sandwiched between the pair of substrates 10 and 20, and a liquid crystal layer disposed between at least one of the pair of substrates 10 and 20 and the liquid crystal layer 30. Alignment film 40. The pair of substrates 10 and 20 may also be bonded via the sealing material 60 .

[0140] The pair of substrates 10 and 20 can be, for example, a combination of an active matrix substrate (TFT substrate) and a color filter (CF) substrate. In addition, the pair of substrates 10 and 20 may be formed by forming both the color filter and the active matrix on one substrate.

[0141] As the active matrix substra...

Embodiment approach 3

[0195] [Liquid crystal display device]

[0196] Another aspect of the present invention may be a liquid crystal display device including the liquid crystal panel of the present invention. The liquid crystal display device includes, for example, a backlight unit on the back of any one of the pair of substrates 10 and 20 of the liquid crystal panel.

[0197] As the backlight unit, a backlight unit commonly used in the field of liquid crystal display devices can be used. The backlight unit is not particularly limited as long as it emits light including visible light, and may be a backlight unit that emits light including only visible light, or may emit light including both visible light and ultraviolet light. backlight unit. In order to enable the liquid crystal display device to perform color display, the backlight unit preferably emits white light. For example, a light emitting diode (Light Emitting Diode, LED) is suitably used as the light source of the backlight 80 . In a...

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Abstract

The present invention provides: a liquid crystal alignment agent that has excellent thermal stability and solvent solubility; and a liquid crystal panel that allows inhibition of generation of ghosting and stains and inhibition of decrease of contrast even in high-temperature environments over a long time period. The present invention is a liquid crystal alignment agent that includes: a solvent; and a copolymer including a structure represented by chemical formula (1). In the formula, X represents a specific structure that includes a cyclic hydrocarbon group, Y1 represents a specific structurethat includes a cyclic hydrocarbon group, R1 represents a horizontal alignment group, a vertical alignment group, or a photoreactive functional group, and Z1 and Z2 are the same or different from each other and each represent a -NH-group, an -O-group, or an -S-group.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent and a liquid crystal panel including an alignment film formed from the liquid crystal aligning agent. Background technique [0002] A liquid crystal display device is a display device that uses a liquid crystal composition for display, and its typical display method is to irradiate light from a backlight to a liquid crystal panel formed by sealing a liquid crystal composition between a pair of substrates, and apply light to the liquid crystal composition. The alignment of the liquid crystal molecules is changed by applying a voltage, thereby controlling the amount of light transmitted through the liquid crystal panel. [0003] In a liquid crystal display device, the alignment of liquid crystal molecules in a state where no voltage is applied is generally controlled by an alignment film subjected to alignment treatment. Conventionally, an alignment film containing a polymer such as a poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337C08G73/18
CPCC08G73/18G02F1/1337C09K19/56C08G69/40C08G73/1096C08G73/22C09K2323/02C09K2323/027G02F1/133788G02F1/133723
Inventor 水崎真伸土屋博司
Owner SHARP KK
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