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

Liquid crystal composition and liquid crystal display element using this composition

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

Active Publication Date: 2015-05-06
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the problem of display burn-in caused by the polymeric compound added to the liquid crystal, and its effect on suppressing drip marks is not sufficient. It is necessary to maintain the basic characteristics of the liquid crystal display element while preventing burn-in Development of liquid crystal display element with drip marks

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 and liquid crystal display element using this composition
  • Liquid crystal composition and liquid crystal display element using this composition
  • Liquid crystal composition and liquid crystal display element using this composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0238] A liquid crystal composition (Example 1) having the following composition was prepared, and its physical property values ​​were measured. The results are shown in the table below.

[0239] A VA liquid crystal display element was produced using the liquid crystal composition of Example 1. This liquid crystal display element has an inverted 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, drop marks, process suitability, and solubility at low temperatures were performed.

[0240] In addition, the symbol on the left side of content describes the abbreviation of the said compound.

[0241] [chem 25]

[0242] Example 1

[0243]

[0244] [Table 1]

[0245] T NI / ℃

[0246] It can be seen that the liquid crystal composition of Example 1 has a liquid crystal phase temperature range of 75.0° C. which is practical as a liquid crystal composition...

Embodiment 2 and Embodiment 3

[0266] A liquid crystal composition having the following composition designed so as to have the same liquid crystal phase temperature range, the same refractive index anisotropy value, and the same dielectric constant anisotropy value as the composition of Example 1 was prepared ( Embodiment 2 and embodiment 3), measure its physical property value. The results are shown in the table below.

[0267] Using the liquid crystal compositions of Example 2 and Example 3, a VA liquid crystal display element was produced in the same manner as in Example 1, and the results of evaluation of burn-in, drop marks, process suitability, and solubility at low temperatures are shown in the same table. middle.

[0268] [Table 4]

Embodiment 2                   Embodiment 3

[0270]

[0271] It can be seen that the liquid crystal composition of Example 2 has a liquid crystal phase temperature range practical as a liquid crystal composition for TV, has a large absolute value of dielectric constant anisotropy, has low viscosity and optimal Δn. When using the liquid crystal composition described in Example 2 to prepare a VA liquid crystal display element and evaluate burn-in, drop marks, process adaptability and solubility at low temperature by the aforementioned method, excellent evaluation results were exhibited.

[0272] It can be seen that the liquid crystal composition of Example 3 has a liquid crystal phase temperature range practical as a liquid crystal composition for TV, has a large absolute value of dielectric constant anisotropy, has low viscosity and optimal Δn. When using the liquid crystal composition described in Example 3 to prepare a VA liquid crystal display element and evaluate the scorching, drop marks, process adaptability and s...

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
electrical resistivityaaaaaaaaaa
Login to View More

Abstract

The problem to be resolved by the present invention is to provide a liquid crystal composition suitable for a liquid crystal display element that achieves a stable spray amount of liquid crystal material in the ODF process that does not easily cause drip marks during manufacturing, and without deterioration of display element burning properties and other various properties of a liquid crystal display element such as dielectric anisotropy, viscosity, upper limit temperature of the nematic phase, nematic phase stability at low temperature, γ1, and the like, and to provide a liquid crystal display element that uses this liquid crystal composition. The present invention provides a liquid crystal composition with negative dielectric anisotropy that contains at least one type of compound expressed by general formula (I), that contains at least one type of compound expressed by general formula (II), and that contains the compound expressed by formula (IIIb-1). Furthermore, in addition, a liquid crystal display element that uses this liquid crystal composition is provided.

Description

technical field [0001] The present invention relates to a liquid crystal composition and a liquid crystal display element which are useful as components of liquid crystal display devices and the like. Background technique [0002] Liquid crystal display devices are being used in various measurement equipment including 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. The liquid crystal compositions used in these liquid crystal display elements are required to be stable against external factors such as moisture, air, heat, and light, to display a liquid crystal phase in as wide a temperature range as possible around room temperature, to have low viscosity, and to have ...

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): C09K19/42C09K19/12C09K19/30C09K19/38G02F1/13
CPCC09K19/44C09K2019/122C09K2019/123C09K2019/3004C09K2019/301C09K2019/3016C09K2019/3027C09K2019/0448C09K19/3003C09K19/542G02F1/13C09K19/12C09K19/30C09K19/38C09K19/42C09K2019/3009C09K2019/548C09K2019/0451C09K19/3001
Inventor 栗泽和树小川真治岩下芳典
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