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Liquid crystal composition and liquid crystal display element using same

A technology of liquid crystal composition and compound, which is applied in the direction of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems such as inability to maintain nematic liquid crystals, achieve suppression of poor display, excellent low-temperature stability and high-speed response, and practicality high effect

Active Publication Date: 2016-06-08
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if a large amount of the non-polar liquid crystal compound that exerts a viscosity-reducing effect is added, there will also be a problem that it is easy to transform to a smectic phase and cannot maintain a nematic liquid crystal.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[1388] Hereinafter, the present invention will be explained in more detail with examples, but the present invention is not limited to these examples. In addition, "%" in the composition of the following Examples and Comparative Examples means "% by mass".

[1389] In the examples, the measured characteristics are as follows.

[1390] Tni: nematic-isotropic liquid phase transition temperature (℃)

[1391] Δn: Refractive index anisotropy at 295K (alias: birefringence)

[1392] Δε: Dielectric constant anisotropy at 295K

[1393] η: Viscosity at 295K (mPa·s)

[1394] γ1: Rotational viscosity at 295K (mPa·s)

[1395] VHR: Voltage retention rate (%) at 313K under the condition of 60Hz frequency and 5V applied voltage

[1396] Burn screen:

[1397] The burn-in evaluation of the liquid crystal display element is to visually evaluate the afterimage level of the fixed pattern when the entire screen is uniformly displayed after displaying a predetermined fixed pattern in the display area for 1440 hou...

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Abstract

The present invention addresses the problem of providing a liquid crystal display element that uses a liquid crystal composition whereby there is no worsening of ghosting characteristics in a display element and characteristics of a liquid crystal display element such as dielectric anisotropy, viscosity, nematic phase upper-limit temperature, nematic phase stability at low temperature, and <gamma>1. Through use of a liquid crystal composition containing a compound represented by general formula (A) and a compound represented by general formula (M), the present invention provides a liquid crystal composition having excellent low-temperature stability while high-speed responsiveness of the liquid crystal composition is maintained, and a liquid crystal display element that includes the liquid crystal composition.

Description

Technical field [0001] The present invention relates to a nematic liquid crystal composition which can be used as a liquid crystal display material and exhibits a positive value of dielectric anisotropy (Δε) and a liquid crystal display element using the same. Background technique [0002] Liquid crystal display elements are used in various measuring equipment represented by clocks and calculators, automotive panels, word processors, electronic notebooks, printers, computers, televisions, clocks, and advertising display panels. As a liquid crystal display method, the representative ones are TN (twisted nematic) type, STN (super twisted nematic) type, vertical alignment type using TFT (thin film transistor) or vertical alignment method such as IPS (plane switching) type, FFS (Fringe field switching) type and other lateral electric field method. The liquid crystal composition used in these liquid crystal display elements is required to be stable against external stimuli such as mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/30C09K19/10C09K19/34C09K19/42
CPCC09K19/44G02F1/1333C09K19/42C09K19/12C09K19/3003C09K2019/122C09K2019/3004C09K2019/3009C09K2019/3422C09K2019/0466G02F1/133738C09K19/3066G02F1/1337G02F1/136286G02F1/1368
Inventor 岩下芳典小川真治
Owner DIC CORP
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