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Positive liquid crystal composition and application thereof in liquid crystal display device

A technology of liquid crystal composition and positive liquid crystal, which is applied in the direction of liquid crystal materials, nonlinear optics, instruments, etc., can solve problems affecting the response time of liquid crystal composition, high rotational viscosity, etc., and achieve improved low temperature working effect, low rotational viscosity, Improve the effect of contrast and response speed

Active Publication Date: 2022-03-01
重庆汉朗精工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Theoretically, the response time can be accelerated by reducing the layer thickness d ("panel gap") of the liquid crystal medium in the LC panel, but to maintain a suitable optical retardation (d • Dn), the liquid crystal composition needs to have a higher birefringence Dn, however Highly birefringent liquid crystal materials known in the art generally also have high rotational viscosities, which in turn affect the response time of the liquid crystal composition

Method used

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  • Positive liquid crystal composition and application thereof in liquid crystal display device
  • Positive liquid crystal composition and application thereof in liquid crystal display device
  • Positive liquid crystal composition and application thereof in liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] A liquid crystal composition provided in this embodiment comprises the following components:

[0125] (1) A compound of formula I-40 accounting for 4.5% of the total weight of the liquid crystal composition;

[0126] (2) Compounds of general formula II accounting for 59.5% of the total weight of the liquid crystal composition: 48.5% of formula II-12, 5% of formula II-15 and 6% of formula II-33;

[0127] (3) The compound of general formula III accounting for 29% of the total weight of the liquid crystal composition: 5% of formula III-16, 3% of formula III-115, 15% of formula III-116, 2% of formula III-117 and 4% of formula III-93;

[0128] (4) The compound of general formula IV accounting for 7% of the total weight of the liquid crystal composition: respectively 1% of IV-53 and 6% of IV-63 compound.

Embodiment 2

[0130] A liquid crystal composition provided in this embodiment comprises the following components:

[0131] (1) The compound of general formula I accounting for 18.5% of the total weight of the liquid crystal composition: containing 7.5% of the compound of formula I-48 and 11% of the compound of formula I-40;

[0132] (2) Compounds of general formula II accounting for 49.5% of the total weight of the liquid crystal composition: 40% of formula II-12, 2% of formula II-15 and 7.5% of formula II-33;

[0133] (3) The compound of general formula III accounting for 31.5% of the total weight of the liquid crystal composition: 3% of formula III-93, 10% of formula III-112, 10.5% of formula III-113 and 8% of formula III-114 ;

[0134] (4) 0.5% of the compound of formula IV-54 based on the total weight of the liquid crystal composition.

Embodiment 3

[0136] A liquid crystal composition provided in this embodiment comprises the following components:

[0137] (1) a compound of formula I-68 accounting for 6% of the total weight of the liquid crystal composition;

[0138] (2) Compounds of general formula II accounting for 50% of the total weight of the liquid crystal composition: 34% of formula II-12, 6% of formula II-15 and 10% of formula II-33;

[0139] (3) Compounds of formula III accounting for 40.5% of the total weight of the liquid crystal composition: 2% of formula III-16, 4% of formula III-18, 6.5% of formula III-98, 10% of formula III-105, 7% of III-112 and 11% of formula III-113;

[0140] (4) 3.5% of the compound of general formula IV accounting for the total weight of the liquid crystal composition: respectively 3% of IV-64 and 0.5% of formula IV-53.

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Abstract

The invention discloses a positive liquid crystal composition and application thereof in a liquid crystal display device. The liquid crystal composition comprises a compound which accounts for 0.01-60% of the total weight of the liquid crystal composition and is shown as a general formula I, a compound which accounts for 1-60% of the total weight of the liquid crystal composition and is shown as a general formula II, a compound which accounts for 1-60% of the total weight of the liquid crystal composition and is shown as a general formula III, and a compound which accounts for 0.1-40% of the total weight of the liquid crystal composition and is shown as a general formula IV. The liquid crystal composition has the advantages of high clearing point, low lower limit temperature of a liquid crystal phase, low rotary viscosity, large elastic constant and the like, the anisotropy of the dielectric constant is positive, the anisotropy of the refractive index and the dielectric anisotropy value are moderate, the response time of a liquid crystal display can be shortened, and therefore the problem that an existing liquid crystal display device is low in response speed is solved. The liquid crystal display panel is suitable for TN-TFT, IPS, FFS and other types of liquid crystal display devices.

Description

technical field [0001] The invention belongs to the field of liquid crystal display materials, and in particular relates to a positive liquid crystal composition and its application in liquid crystal display devices. Background technique [0002] Liquid crystal material is a mixture of organic rod-shaped small molecular compounds with both fluidity of liquid and anisotropy of crystal at a certain temperature. It is widely used because of its optical anisotropy and dielectric anisotropy In liquid crystal display components of automotive instruments, televisions, computers, word processors and other devices. Liquid crystal materials are usually used as a mixture of multiple components to exhibit characteristics that are difficult for a single compound to exhibit. As a component of a liquid crystal composition, a liquid crystal compound must have good chemical and physical stability, high-definition bright spots, and a low minimum temperature of the liquid crystal phase. , app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44G02F1/1333
CPCC09K19/44G02F1/1333
Inventor 史志兵孙刚
Owner 重庆汉朗精工科技有限公司
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