Liquid crystal composition and application thereof

A technology of liquid crystal composition and liquid crystal compound, applied in liquid crystal materials, optics, instruments, etc., can solve the problems of increased rotational viscosity, increased threshold voltage and rotational viscosity, increased birefringence of liquid crystal composition, etc., reaching the upper limit The effect of high temperature, low minimum temperature and high response speed

Active Publication Date: 2012-09-12
SUPERD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the rotational viscosity is reduced to improve the response time, the elastic constant and phase transition temperature of the liquid crystal will also decrease, and if the elastic constant increases, the threshold voltage and rotational viscosity will tend to increase
At the same time, if the thickness of the liquid crystal layer is reduced, the birefringence of the liquid crystal composition will increase, which will also lead to an increase in the rotational viscosity.

Method used

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  • Liquid crystal composition and application thereof
  • Liquid crystal composition and application thereof
  • Liquid crystal composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] The nematic liquid crystal composition of embodiment 1 is made up of following compound, and wherein percentage represents mass fraction:

[0100]

[0101] The nematic liquid crystal composition performance parameter table of this embodiment 1

[0102] Tni:

[0103] ε∥

[0104] Using the liquid crystal lens grating of the liquid crystal composition, its response time T=540ms, the corresponding liquid crystal lens focal length f=1.02mm; and using the liquid crystal material E7 that is currently on the market, its response time T=1210ms, the corresponding liquid crystal lens Focal length f = 1.85mm. Then using the liquid crystal material of the present invention, the response time is increased by 55%, and the focal length is reduced by 45%.

Embodiment 2

[0106] The nematic liquid crystal composition of embodiment 2 is made up of following compound, and wherein percentage represents mass fraction:

[0107]

[0108]

[0109] The nematic liquid crystal composition performance parameter table of this embodiment 2

[0110] Tni:

[0111] Using the liquid crystal lens grating of the liquid crystal composition, its response time T=500ms, the corresponding liquid crystal lens focal length f=1.08mm; and using the liquid crystal material E7 that is currently on the market, its response time T=1210ms, the corresponding liquid crystal lens Focal length f = 1.85mm. Then using the liquid crystal material of the present invention, the response time is increased by 59%, and the focal length is reduced by 42%.

Embodiment 3

[0113] The nematic liquid crystal composition of embodiment 3 is made up of following compound, and wherein percentage represents mass fraction:

[0114]

[0115]

[0116] The nematic liquid crystal composition performance parameter table of this embodiment 3

[0117] Tni:

[0118] The liquid crystal lens grating using this liquid crystal composition has a response time of T=605ms, and the corresponding focal length of the liquid crystal lens is f=1.10mm; while using the liquid crystal material E7 currently on the market, its response time is T=1210ms, and the corresponding liquid crystal lens Focal length f = 1.85mm. Then using the liquid crystal material of the present invention, the response time is increased by 50%, and the focal length is reduced by 41%.

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Abstract

The invention provides a liquid crystal composition and an application thereof. Based on 100 percent by mass of the composition, the liquid crystal composition comprises the following components in percentage by mass: 0-70 percent of a nematic liquid crystal compound shown as a formula I, 0-50 percent of a nematic liquid crystal compound shown as a formula II, 0-50 percent of a nematic liquid crystal compound shown as a formula III, 0-30 percent of a nematic liquid crystal compound shown as a formula IV and 0-30 percent of a nematic liquid crystal compound shown as a formula V. The liquid crystal composition has high birefringence rate, and has the characteristics of high upper limit temperature of a nematic phase, low lower limit temperature of the nematic phase, low rotation viscosity, high response speed and the like. The liquid crystal composition provided by the invention can be applied in the fields of variable-focus liquid crystal lenses and the like.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a nematic liquid crystal composition. The liquid crystal composition of the invention can be used in fields such as variable focus liquid crystal lenses (Liquid Crystal lens). Background technique [0002] In 1888, when F. Reinitzer measured the melting point of organic compounds, he found that some compounds experienced an opaque turbid state after melting. This turbid liquid interphase has a phenomenon similar to that of crystals, and is called liquid crystal. In the 1970s, due to the development of large-scale integrated circuits and liquid crystal materials, breakthroughs were made in the application of liquid crystals in display. By combining the electro-optical effect of twisted nematic liquid crystals with integrated circuits, they were made into display devices. , Realizing the industrialization of liquid crystal materials, this liquid crystal material is called Twisted Ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44G02F1/29G02F1/1333
CPCC09K2019/0444
Inventor 吴坤李建军戈张宋磊刘宁
Owner SUPERD CO LTD
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