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Nematic liquid crystal composition

A technology for liquid crystal compositions and liquid crystal compounds, applied in the directions of liquid crystal materials, chemical instruments and methods, can solve the problems of increased rotational viscosity, increased birefringence of liquid crystal compositions, increased threshold voltage and rotational viscosity, etc. Effects of low rotational viscosity, wide phase transition temperature range, large birefringence

Active Publication Date: 2014-09-24
SUPERD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 cause the rotational viscosity to increase.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] The nematic liquid crystal composition of embodiment 1 is made up of the compound of following mass fraction, and wherein percentage represents the percentage relative to the total mass of this liquid crystal composition:

[0115]

[0116]

[0117] After testing, the performance parameters of the nematic liquid crystal composition of the embodiment 1 are shown in the following table:

[0118] Tni 85℃ Tcn -10℃ ε / / 20.5 ε⊥ 5.39 Δε 15.11 Δn 0.2584 k 11 9.52 k 33 18.0 gamma 1 110 gamma 1 / k 11 11.55 V th 0.75

Embodiment 2

[0120] The nematic liquid crystal composition of embodiment 2 is made up of the compound of following mass fraction, and wherein percentage represents the percentage relative to the total mass of this liquid crystal composition:

[0121]

[0122]

[0123] After testing, the performance parameters of the nematic liquid crystal composition of Example 2 are as follows:

[0124] Tni 102℃ Tcn -10℃ ε / / 19.91 ε⊥ 4.63 Δε 15.28 Δn 0.2619 k 11 10.7 k 33 18.4 Г 1 105 gamma 1 / k 11 9.81 V th 0.83V

Embodiment 3

[0126] The nematic liquid crystal composition of embodiment 3 is made up of the compound of following mass fraction, and wherein percentage represents the percentage relative to the total mass of this liquid crystal composition:

[0127]

[0128] After testing, the performance parameters of the nematic liquid crystal composition of Example 3 are as follows:

[0129] Tni 95℃ Tcn -15℃ ε / / 21.6 ε⊥ 4.78 Δε 16.82 Δn 0.3441 k 11 10.4 k 33 21 Г 1 118.0 gamma 1 / k 11 11.34 V th 0.79V

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Abstract

The invention relates to a nematic liquid crystal composition. The composition contains at least a nematic liquid crystal compound as shown in the formula (I), at least a nematic liquid crystal compound as shown in the formula (II), at least a nematic liquid crystal compound as shown in the formula (III), at least a nematic liquid crystal compound as shown in the formula (IV), at least a nematic liquid crystal compound as shown in the formula (V) and at least an optionally optically active compound. The nematic liquid crystal composition provided by the invention has high birefringence, low visco-elastic coefficient ratio gamma 1 / k11 and a wide phase transition temperature range. In addition, the liquid crystal composition has high ultraviolet ray stability and high thermal stability.

Description

technical field [0001] The present invention relates to the technical field of liquid crystals, in particular, the present invention relates to a liquid crystal liquid crystal liquid crystal liquid crystal liquid crystal with a large birefringence and a small viscoelastic coefficient ratio γ 1 / k 11 A nematic liquid crystal composition with a wide phase transition temperature range. Background technique [0002] As the mainstream of display technology, liquid crystal display is widely used in TN display, STN display, PDLC display, multi-stable display, phase modulator, mobile phone and camera, variable focus liquid crystal glasses, liquid crystal shutter 3D glasses, 3D three-dimensional display liquid crystal slit grating, 3D stereoscopic image display with variable focus liquid crystal lens (Liquid Crystal lens) and other technical fields. With the rapid development of liquid crystal materials and display control technology, liquid crystal display technology is being disp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/44C09K19/34C09K19/30C09K19/12
Inventor 吴坤吴光辉李建军
Owner SUPERD CO LTD
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