Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nematic cholesteric phase multistable liquid crystal composition and liquid crystal display

A liquid crystal composition and liquid crystal display technology, which are applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, can solve the problem of insufficient contrast of CLC display devices, and achieve the stability of small wavelengths with temperature changes, high contrast, and wide operating temperature. wide effect

Inactive Publication Date: 2015-07-01
HALATION PHOTONICS CORP
View PDF12 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, by using isothiocyanate compounds with high optical birefringence, the problem of insufficient contrast of CLC display devices is solved

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 cholesteric phase multistable liquid crystal composition and liquid crystal display
  • Nematic cholesteric phase multistable liquid crystal composition and liquid crystal display
  • Nematic cholesteric phase multistable liquid crystal composition and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] (1) Preparation of compounds represented by general formula I-a:

[0062] 1) The synthesis route of the intermediate M1-a of the compound represented by the general formula I-a:

[0063]

[0064] 2) Synthetic route for the preparation of compounds represented by general formula I-a:

[0065]

[0066] Wherein, n is an integer of 2-9.

[0067] (2) Preparation of compounds represented by general formula I-b:

[0068] 1) The synthetic route of the intermediate M1-b of the compound represented by the general formula I-b:

[0069]

[0070] 2) Synthetic route for the preparation of compounds represented by general formula I-b:

[0071]

[0072] Wherein, n is an integer of 2-9.

[0073] Compound I-1 to Compound I-5 were prepared using the above synthesis process and route, wherein the chirality of the final product comes from the raw material binaphthol (S- or R-), in other words, the above four compounds correspond to 8 compounds with Compounds with different ...

Embodiment 1

[0102] Embodiment 1: cholesteric mixed liquid crystal, wherein the total mass content of the nematic phase part is 97.56%, and the mass content of the chiral dopant is 2.44%. In the nematic phase part, terphenylacetylene isothiocyanate, biphenylacetylene isothiocyanate and terphenylacetylene isothiocyanate monomers are used to increase the birefringence of the mixed liquid crystal on the one hand, and increase its reflectivity to thereby Improve the contrast; on the other hand, increase its dielectric anisotropy to reduce the driving voltage of the formulation. The specific composition and properties of Embodiment 1 are shown in Table 3.

[0103] Table 3. Composition and properties of the cholesteric multistable liquid crystal composition of Example 1

[0104]

[0105]

Embodiment 2

[0113] Embodiment 2: cholesteric mixed liquid crystal, wherein the total mass content of the nematic phase part is 97.73%, and a chiral dopant of pentanephthalene is used, and its mass content is 2.27%. In the nematic phase part, the bicyclic pyridine isothiocyanate monomer is used together with the bicyclic pyridyl cyano monomer, which can also improve the contrast and reduce the driving voltage. The specific composition and performance of Embodiment 2 are shown in Table 5.

[0114] Table 5. Composition and properties of the cholesteric multistable liquid crystal composition of Example 2

[0115]

[0116]

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
wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a nematic cholesteric phase multistable liquid crystal composition and a liquid crystal display. The liquid crystal composition comprises a chiral dopant which is one or more selected from E ring parallel naphthalene chiral compounds expressed in general formulae I-a and I-b and dual-chiral center compounds expressed in general formulae II-a and II-b; the formulae are as shown in the specification), wherein n is a positive integer within 2-9; R is H or linear alkyl of C1-C12 and the optical activities of two chiral centers of the compound are consistent. The nematic cholesteric phase multistable liquid crystal composition is capable of effectively broadening the using temperature range of CLC liquid crystal and effectively improving the contrast of CLC display devices.

Description

technical field [0001] The invention relates to a nematic cholesteric phase multistable liquid crystal composition and a liquid crystal display, which are applied in the ultra-low power consumption display industry, such as the electronic paper industry and the electronic label industry. Background technique [0002] Reflective cholesteric liquid crystal display (CLCD for short), such as SSCT display (surface-stabilized cholesteric structure) and PSCT display (polymer-stabilized cholesteric structure), can have Planar Texture (P-state for short), focal conic texture (Focal Conic Texture, FC state for short) and other stable phase states, which have zero-field memory characteristics, and can maintain display for a long time at zero electric field content, its energy consumption is only about 1 / 8 of that of TFT-LCD, and it has the characteristics of ultra-low power consumption. Its planar texture and focal conic texture are as follows Figure 5-1 with Figure 5-2 shown. Mor...

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): C09K19/58C09K19/44C09K19/12C09K19/34C09K19/18G02F1/1333G02F1/1337
Inventor 尹环翟怀彬于涛谭志先任惜寒
Owner HALATION PHOTONICS CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com