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

Liquid crystal composition

A technology of liquid crystal composition and compound, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of insufficient effect and screen burn-in, and achieve the effect of less occurrence of screen burn-in and excellent high-speed response

Active Publication Date: 2014-06-25
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
View PDF4 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, there is a problem of screen burn-in caused by the polymeric compound added to the liquid crystal, and the effect of suppressing drip marks is not sufficient. Therefore, it is required to develop a method that maintains the fundamentals of liquid crystal display elements. characteristics, while screen burn-in and drop marks are difficult to occur in liquid crystal display elements

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
  • Liquid crystal composition
  • Liquid crystal composition
  • Liquid crystal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0157] A liquid crystal composition having the composition shown below was prepared, and its physical property values ​​were measured. The results are shown in the table below.

[0158] Use the liquid crystal composition of embodiment 1, make figure 1 The VA liquid crystal display element shown. This liquid crystal display element has an inverse stagger type thin film transistor as an active element. The injection of the liquid crystal composition was performed by a dropping method, and evaluations of burn-in and drop marks were performed.

[0159] In addition, the symbol on the right side of content is description of the abbreviation of the said compound.

[0160] Example 1

[0161]

[0162] [Table 1]

[0163] T NI / ℃

[0164] It can be seen that the liquid crystal composition of Example 1 has a liquid crystal layer temperature range of 81° C. which is practical as a liquid crystal composition for TV, has a large absolute value of dielectric constant aniso...

Embodiment 2 and 3

[0166] A liquid crystal composition having the composition shown below was prepared, and its physical property values ​​were measured. The results are shown in the table below.

[0167] Using the liquid crystal compositions of Examples 2 and 3, a VA liquid crystal display element was produced in the same manner as in Example 1, and evaluations of burn-in and drop marks were performed, and the results showed excellent evaluations as shown in the table below.

[0168] [Table 2]

Embodiment 2        Embodiment 3

[0170]

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
temperatureaaaaaaaaaa
electrical resistivityaaaaaaaaaa
electrical resistivityaaaaaaaaaa
Login to View More

Abstract

The present invention relates to: a nematic liquid crystal composition with negative dielectric anisotropy ([delta][epsilon]) which is useful as a liquid crystal display material; and a liquid crystal display element using the same. The present invention provides a liquid crystal composition with which drop marks are not easily generated at the time of production and which does not impair the various properties as a liquid crystal display element such as dielectric anisotropy, viscosity, nematic phase upper limit temperature, and gamma1, or burn-in properties of a display element. This liquid crystal display element has fast response, develops less burn-in, and generates less drop marks caused by production thereof, and thus is useful especially for a VA mode or PSVA mode liquid crystal display element for an active matrix drive, and can be applied to a liquid crystal display element for a liquid crystal TV, monitor, etc.

Description

technical field [0001] The present invention relates to a liquid crystal composition and a liquid crystal display element useful as constituent members of a liquid crystal display device or the like. Background technique [0002] Liquid crystal display elements are used in various measurement equipment represented by clocks and calculators, automotive panels, word processors, electronic notebooks, printers, computers, televisions, clocks, advertising display boards, etc. Typical liquid crystal display methods include TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, VA (Vertical Alignment) type using TFT (Thin Film Transistor), and IPS (In-Plane Switching) type. Wait. The liquid crystal compositions used in these liquid crystal display elements are required to be stable against external factors such as moisture, air, heat, light, etc., to display a liquid crystal phase in as wide a temperature range as possible around room temperature, to have low viscosity, and ...

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): C09K19/42C09K19/12C09K19/20C09K19/30C09K19/38G02F1/13
CPCC09K2019/3016C09K2019/301C09K19/44C09K2019/3009C09K2019/123C09K2019/3004C09K2019/0448G02F1/133397C09K19/3003C09K19/542C09K2019/548G02F1/1334G02F1/1362
Inventor 小川真治岩下芳典
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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