Liquid crystal display device

一种液晶显示装置、液晶组合物层的技术，应用在液晶材料、仪器、化学仪器和方法等方向，能够解决电压保持率降低、离子密度增加、白斑等问题，达到防止降低、防止白斑的效果

Active Publication Date: 2015-05-13
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The present invention provides a liquid crystal display device using a color filter and a specific liquid crystal composition, and the color filter uses a pigment having a specific water-soluble component and / or conductivity, thereby preventing liquid crystal The reduction of the voltage retention ratio (VHR) of the layer and the increase of the ion density (ID) solve the problems of white spots, uneven orientation, burn-in and other display defects

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0213] The thermoplastic resin used in the preparation of the photocurable composition includes, for example, polyurethane resins, acrylic resins, polyamide resins, polyimide resins, styrene maleic acid resins, and styrene maleic anhydride. Series resin, etc.

[0214] As the photocurable compound, for example, 1,6-hexanediol diacrylate, ethylene glycol diacrylate, neopentyl glycol diacrylate, triethylene glycol diacrylate, bis(acryloxy ethylene Oxy)Bifunctional monomers such as bisphenol A, 3-methylpentanediol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, tris(2-(meth)acryloyloxy) (Base ethyl) isocyanurate, dipentaerythritol hexaacrylate, dipentaerythritol pentaacrylate and other smaller molecular weight multifunctional monomers, polyester acrylate, polyurethane acrylate, polyether acrylate, etc. Multifunctional monomer.

[0215] As the photopolymerization initiator, for example, acetophenone, benzophenone, benzyl dimethyl ketal, benzoyl peroxide, 2-chl...

Embodiment 1～4

[0319] An electrode structure is made on the first and second substrates, and horizontally oriented alignment films are formed on the opposite sides of each, and then rubbed to form a TN cell. Table 9 is clamped between the first and second substrates The shown liquid crystal composition 1 has a positive dielectric constant anisotropy. Then, the color filters 1 to 4 shown in Table 8 were used to produce a liquid crystal display device of Example 1 (d gap = 3.5 μm, oriented film AL-1051). The VHR and ID of the obtained liquid crystal display device were measured. In addition, the burn-in of the obtained liquid crystal display device was evaluated. The results are shown in Table 10.

[0320] [Table 9]

[0321]

[0322] [Table 10]

[0323]

[0324] The liquid crystal display devices of Examples 1 to 4 achieved high VHR and small ID. In addition, in the burn-in evaluation, there is no afterimage, or even if there is, it is very slight, which is an acceptable level.

Embodiment 5～16

[0340] In the same manner as in Example 1, the positive dielectric constant anisotropic liquid crystals shown in Table 15 were sandwiched, and the color filters shown in Table 8 were used to prepare liquid crystal display devices of Examples 5 to 12, and their VHR and ID were measured. In addition, the burn-in evaluation of the liquid crystal display device was performed. The results are shown in Tables 16-18.

[0341] [Table 15]

[0342]

[0343] [Table 16]

[0344]

[0345] Color filter

[0346] [Table 17]

[0347]

[0348] [Table 18]

[0349]

[0350] The liquid crystal display devices of Examples 5-16 achieved high VHR and small ID. In addition, in the burn-in evaluation, there is no afterimage, or even if there is, it is very slight, which is an acceptable level.

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Abstract

The present invention relates to a liquid crystal display device using color filters in which a specific liquid crystal composition and a specific pigment are used. The present invention provides a liquid crystal display device in which the voltage holding rate (VHR) of a liquid crystal layer is reduced, and an increase in ion density (ID) is prevented, and which overcomes problems with display defects such as white voids, uneven alignment, and image retention. This liquid crystal display device has the features of reducing the voltage holding rate (VHR) of a liquid crystal layer, preventing an increase in ion density (ID), and suppressing display defects such as image retention, and is therefore useful particularly as a liquid crystal display device having a VA mode or PSVA mode for active-matrix driving, and can be applied as a liquid crystal display such as for a liquid crystal TV, a monitor, a portable telephone, or a smartphone.

Description

Technical field [0001] The present invention relates to a liquid crystal display device. Background technique [0002] Liquid crystal display devices started from being used in clocks and calculators, and then developed to various electrical appliances, measuring instruments, automotive panels, word processors, electronic notebooks, printers, computers, televisions, etc. for household use. As a liquid crystal display method, its representative methods include TN (twisted nematic) type, STN (super twisted nematic) type, DS (dynamic light scattering) type, GH (guest-host) type, IPS (in-plane switching) type, OCB (Optical Compensation Birefringence) type, ECB (Voltage Controlled Birefringence) type, VA (Vertical Alignment) type, CSH (Color Super Vertical) type or FLC (Ferroelectric Liquid Crystal) etc. In addition, as a driving method, it has also changed from the conventional static driving to the general multiplex driving. The simple matrix method and the recent active matrix (AM...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335C09K19/12C09K19/20C09K19/30C09K19/32C09K19/42G02B5/20G02F1/13
CPCC09K19/2014C09K19/322C09K19/60G02B5/20G02F1/1335C09K2019/0466C09K2019/0448C09K2019/523C09K2019/122C09K2019/123C09K2019/3021C09K2019/3016C09K2019/301C09K2019/3004C09K2019/304C09K2019/3037C09K2019/3036G02F1/13C09K19/3001C09K19/3066C09K19/542G02F1/133512G02F1/133514
Inventor 金亲昌和竹内清文船仓省二鸳海功岛田胜德
Owner DIC CORP
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