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Negative dielectric anisotropy liquid crystal composition

A liquid crystal composition, anisotropic technology, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of reducing viscosity and optical anisotropy

Active Publication Date: 2014-04-02
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, to meet the requirements of liquid crystal display, the viscosity and Δn of the liquid crystal composition should be adjusted appropriately. It is known that replacing an aromatic ring in the compound with a cyclohexyl ring will reduce the viscosity and optical anisotropy

Method used

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  • Negative dielectric anisotropy liquid crystal composition
  • Negative dielectric anisotropy liquid crystal composition
  • Negative dielectric anisotropy liquid crystal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] IIA-2 11% Δε -6.9

[0089] IIA-4 11% Cp[°C] 89.3

[0090] IIB-1 5% Δn[20°C, 589nm] 0.090

[0091] IIB-2 8% V 10 [V, 20°C] 1.43

[0092] IIB-4 12%

[0093] IIB-5 16%

[0094] IIB-6 15%

[0095] III-4 1%

[0096] III-5 1%

[0097] III-6 1%

[0098] III-7 1%

[0099] IC-1 4%

[0100] IC-2 2%

[0101] IC-4 2%

[0102] IC-5 4%

[0103] IC-6 2%

[0104] IC-7 3%

[0105] IC-8 1%

Embodiment 2

[0107] IIA-2 14% Δε -6.4

[0108] IIA-4 16% Cp[°C] 82.3

[0109] IIB-2 8% Δn[20°C, 589nm] 0.090

[0110] IIB-4 13% V 10 [V, 20°C] 1.54

[0111] IIB-5 16%

[0112] IIB-7 16%

[0113] III-4 1%

[0114] III-5 1%

[0115] III-6 1%

[0116] III-7 1%

[0117] IC-1 6%

[0118] IC-2 4%

[0119] IC-4 4%

Embodiment 3

[0121] IIA-2 11% Δε -7.5

[0122]IIA-4 16% Cp[°C] 81.0

[0123] IIB-2 8% Δn[20°C, 589nm] 0.089

[0124] IIB-4 12% V 10 [V, 20°C] 1.34

[0125] IIB-5 16%

[0126] IIB-6 15%

[0127] III-4 1%

[0128] III-5 1%

[0129] III-6 1%

[0130] III-7 1%

[0131] IA-1 10%

[0132] IC-2 4%

[0133] IC-4 4%

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Abstract

The invention provides a negative dielectric anisotropy liquid crystal composition, which at least comprises negative dielectric anisotropy liquid crystal compounds represented by a formula (I) and a formula (II), wherein R1 is alkyl with 1 to 12 carbon atoms; R2 is alkyl or alkoxy with 1 to 12 carbon atoms; A represents a trans 1,4-cyclohexyl or 1,4-phenylene; and n represents an integer 1 or 2. The composition has the characteristics of good performance, low threshold voltage, fast response, ideal contrast and visual angle and the like. Compared with the products with the similar performance, the composition has obvious cost advantages, and is a low-price and good-quality liquid crystal material for manufacturing LCD display devices of vehicle-mounted systems and small appliances.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a liquid crystal composition with relatively large negative dielectric anisotropy (Δε<0). Background technique [0002] Liquid crystal is an important material used in liquid crystal display (LCD), and it has been widely concerned by people since the discovery of liquid crystal properties. In recent decades, especially with the rapid development of information technology and people's continuous pursuit of information display methods in the past ten years, liquid crystal display has achieved the most rapid development. Today, liquid crystal displays are being displayed in front of people in a variety of forms, and many of its products are becoming fashionable pursuits and popular commodities in shopping malls due to their excellent characteristics. [0003] Liquid crystal display has experienced a long development path with the discovery of liquid crystal. In 1888, the Austrian...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/46C09K19/30C09K19/20C09K19/18
Inventor 陈海光杨春艳杭德余姜天孟田会强储士红张嫣然
Owner BEIJING BAYI SPACE LCD MATERIALS TECH