Unlock instant, AI-driven research and patent intelligence for your innovation.

Nematic liquid crystal composition and liquid crystal display element using same

A liquid crystal composition and compound technology, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve problems such as poor display and slow response speed, and achieve the effect of excellent display quality and high-speed response of display quality

Active Publication Date: 2022-01-11
DIC CORP
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, a liquid crystal composition containing a liquid crystal material having an alkenyl group effective for lowering the viscosity is effective for reducing the response speed, but after polymerization of a polymerizable compound in the production process of a PSA display element, display may sometimes occur. Bad and other problems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nematic liquid crystal composition and liquid crystal display element using same
  • Nematic liquid crystal composition and liquid crystal display element using same
  • Nematic liquid crystal composition and liquid crystal display element using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0244] Hereinafter, examples are given and the present invention will be described in further detail, but the present invention is not limited to these examples. In addition, "%" in the composition of a following Example and a comparative example means "mass %".

[0245] The following abbreviations are used for descriptions of compounds in Examples.

[0246] (side chain)

[0247] -n -C n h 2n+1 straight-chain alkyl group with carbon number n

[0248] n-C n h 2n+1 - Straight-chain alkyl group with carbon number n

[0249] -On -OC n h 2n+1 straight-chain alkoxyl with carbon number n

[0250] nO-C n h 2n+1 O- straight-chain alkoxy with carbon number n

[0251] -V -CH=CH 2

[0252] V-CH 2 =CH-

[0253] -V1 -CH=CH-CH 3

[0254] 1V-CH 3 -CH=CH-

[0255] -2V -CH 2 -CH 2 -CH=CH 3

[0256] V2-CH 3 =CH-CH 2 -CH 2 -

[0257] -2V1-CH 2 -CH 2 -CH=CH-CH 3

[0258] 1V2-CH 3 -CH=CH-CH 2 -CH 2 -

[0259] (connecting group)

[0260] -CF2O- -CF 2 -O-

[026...

Embodiment 5～8

[0283] In addition, a liquid crystal display device in PSVA mode was produced using a liquid crystal composition obtained by adding 0.3 mass % of formula (XX-4) as a polymerizable compound to 99.7 mass % of each liquid crystal composition of LC-1 to LC-4. None of the elements exhibited a defect, and sufficient high-speed response was confirmed.

Embodiment 9～12

[0285] Using a liquid crystal composition obtained by adding 0.35% by mass of a compound of formula (XX-2) as a polymerizable compound to 99.65% by mass of liquid crystal composition LC-A, a PSVA mode liquid crystal display element was produced, and a burn-in phenomenon was observed.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
temperatureaaaaaaaaaa
thicknessaaaaaaaaaa
refractive indexaaaaaaaaaa
Login to View More

Abstract

The problem to be solved by the present invention is to require Δε to be negative and have a large absolute value, and the rotational viscosity (γ 1 ) low, elastic constant (K 33 ) large, solid phase-nematic phase transition temperature (T cn ) low, nematic-isotropic liquid phase transition temperature (T ni ) and high voltage retention rate (VHR). In addition, it is also intended to provide liquid crystal display elements of VA type, PSVA type, PSA type, FFS type, etc. which are free from display defects such as screen burn-in and display unevenness or are suppressed, have excellent display quality, and have high-speed response. The method for solving the problem is to provide a liquid crystal composition having a negative dielectric constant anisotropy (Δε) and a liquid crystal display device using the liquid crystal composition, the liquid crystal composition containing a compound represented by the formula (I-1) As the first component, and containing the compound represented by formula (I-2) as the second component.

Description

technical field [0001] The present invention relates to a nematic liquid crystal composition having a negative dielectric constant anisotropy (Δε), which is useful as a liquid crystal display material, and a liquid crystal display element using the nematic liquid crystal composition. Background technique [0002] Liquid crystal display devices have been used in clocks and calculators, and have been used in various household electrical equipment, measuring equipment, automotive panels, mobile phones, computers, and televisions. Examples of liquid crystal display 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, and FFS type. (Fringe Field Switching) type, OCB (Optically Compensated Birefringence) type, ECB (Voltage Controlled Birefringence) type, VA (Vertical Alignment) type, PSVA type, PSA type, CSH (Color Hypervertic) type or FLC (Fe Electrical liquid crystal...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/54C09K19/12C09K19/20C09K19/30C09K19/42G02F1/13
CPCC09K19/12C09K19/20C09K19/30C09K19/42C09K19/54G02F1/13
Inventor 须藤豪后藤麻里奈
Owner DIC CORP