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Liquid crystal composition for liquid crystal display

A liquid crystal composition, liquid crystal display technology, applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve problems such as threshold voltage rise

Active Publication Date: 2014-05-21
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, for the purpose of improving the brightness of the display, it is effective to increase the aperture ratio and increase the electrode spacing. However, in this case, the device structure of the IPS mode will lead to an increase in the threshold voltage. In order to prevent the threshold from increasing, it is necessary to have a high Liquid crystal composition with dielectric anisotropy (△￡)

Method used

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  • Liquid crystal composition for liquid crystal display
  • Liquid crystal composition for liquid crystal display
  • Liquid crystal composition for liquid crystal display

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Experimental program
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Effect test

preparation example Construction

[0071] The preparation of liquid crystal sample in the embodiment of the present invention all adopts following method:

[0072] The preparation of uniform liquid crystal adopts the thermal dissolution method commonly used in the industry. First, the liquid crystal compound is weighed by weight percentage with a balance. There is no specific requirement for the order of weighing and adding. Usually, the liquid crystal compound is weighed and mixed in order of melting point from high to low. Heat and stir at 60-100°C to make each component melt evenly, then filter, spin evaporate, and finally package to obtain the target sample. In addition, the method involved in the patent CN101502767A can also be used to prepare uniform liquid crystals.

[0073] Unless otherwise stated, in this context, percentages are by weight and all temperatures are given in degrees Celsius. Use the following abbreviations: V 10 Threshold voltage = characteristic voltage at relative 10% contrast (V, 20...

Embodiment 1

[0075] The following liquid crystal compounds are used in the following weight percentages to prepare liquid crystal compositions, and the specific proportions and the properties of the obtained liquid crystal compositions are shown in Table 1:

[0076] The proportioning and performance parameter of the liquid crystal composition of table 1 embodiment 1

[0077] Ⅰ-2

[0078] Ⅰ-7

Embodiment 2

[0094] The following liquid crystal compounds are used in the following weight percentages to prepare liquid crystal compositions, and the specific proportions and the properties of the resulting liquid crystal compositions are shown in Table 4:

[0095] The proportioning and performance parameter of the liquid crystal composition of table 4 embodiment 2

[0096] Ⅰ-1

[0097] I-4

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Abstract

The invention provides a liquid crystal composition for a liquid crystal display. The composition comprises: (1) a first ingredient comprising a compound shown in general formula I and a compound shown in general formula II, and has the content of 1-50%; (2) a second ingredient comprising a compound shown in general formula III and has the content of 1-70%; (3) a third ingredient comprising a compound shown in general formula IV and has the content of 2-30%; (4) a fourth ingredient comprising a compound shown in general formula V and has the content of 1-30%; and (5) an optically active component with the content of 0-0.5%, wherein the sum of the first component, the second component, the third component and the fourth component is 100%, and the optically active compound is added individually with the content taking 0-0.5% of the sum of the first component, the second component, the third component and the fourth component. The liquid crystal composition provided by the invention is excellent in property, pretty low in voltage and viscosity, proper in refractive index and clearing point, high in resistivity and voltage holding ratio, and extremely low in ion concentration, and is applicable to a TN (Twisted Nematic) liquid crystal display, an FFS (Fringe Field Switching) liquid crystal display, an IPS (In-Plane Switching) liquid crystal display, an SFT (Super-Fine Transistor) liquid crystal display and the like, which are fast in resonance.

Description

technical field [0001] The present invention relates to a liquid crystal composition, in particular to a liquid crystal composition containing 3,5-difluoro-4-perfluorovinyl difluoromethoxybenzene compound. Background technique [0002] As early as the second half of the nineteenth century, many scholars in different fields including physics, chemistry, biology and other fields have observed the strange phenomenon that some compounds show as the temperature changes. In 1888, Austrian botanist Friedrich Reinitzer discovered cholesterol benzoate with two melting points when studying the effects of cholesterol on plants. Subsequently, German physicist Otto Lehmann named it liquid crystal. Since the discovery of the liquid crystal phenomenon for more than 100 years, people have never stopped studying it. [0003] In the early days, O.Wiener and others discovered the birefringence theory of liquid crystals, E.Bose proposed the phase theory of liquid crystals, V.Grandiean et al. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/20C09K19/44G02F1/1333
Inventor 陈海光白玉勤杭德余姜天孟田会强储士红杨春艳
Owner BEIJING BAYI SPACE LCD MATERIALS TECH