Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Nematic liquid crystal composition

A technology of liquid crystal composition and liquid crystal compound, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve problems such as increased rotational viscosity, increased birefringence of liquid crystal composition, increased threshold voltage and rotational viscosity, etc., to achieve Effects of low rotational viscosity, wide phase transition temperature range, and large birefringence

Active Publication Date: 2012-05-02
SUPERD CO LTD
View PDF8 Cites 23 Cited by
  • 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 cause the rotational viscosity to increase.

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
  • Nematic liquid crystal composition
  • Nematic liquid crystal composition

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

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
refractive indexaaaaaaaaaa
refractive indexaaaaaaaaaa
refractive indexaaaaaaaaaa
Login to View More

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

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 Applications(China)
IPC IPC(8): C09K19/44C09K19/34C09K19/30C09K19/12
Inventor 吴坤吴光辉李建军
Owner SUPERD CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products