A kind of high-contrast liquid crystal composition and its application

A liquid crystal composition and high-contrast technology, applied in liquid crystal materials, optics, instruments, etc., can solve problems such as reducing backlight life, light leakage, and increasing backlight energy consumption

Active Publication Date: 2015-11-25
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The main function of the liquid crystal display is to act as a light switch. After the light passes through the liquid crystal layer, the light loss is only about 10% of the original light. Therefore, in order to obtain a brighter display effect, the brightness of the backlight must be increased, which will increase the energy consumption of the backlight. and reduce backlight lifetime
[0015] For the in-plane switching mode (IPS), the liquid crystal molecules are rearranged under the action of an electric field, but the positive dielectric anisotropy composition of the prior art will tilt when it is close to the electrode molecules, resulting in light leakage, resulting in a decrease in contrast

Method used

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  • A kind of high-contrast liquid crystal composition and its application
  • A kind of high-contrast liquid crystal composition and its application
  • A kind of high-contrast liquid crystal composition and its application

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Effect test

preparation example Construction

[0109] The preparation of liquid crystal composition in the embodiment of the present invention all adopts following method:

[0110] 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.

[0111] Unless otherwise stated, percentages in this context are by weight and all temperatures are given in degrees Celsius. Use the following abbreviations:

[0112] △n is optical anisotropy (20°C), Δε is dielectric anisotropy (25°C, 1000Hz), ε ∥ For parallel dielectric (25℃, 1000Hz), V 10 is the threshold voltage, which is the characteristic...

Embodiment 1

[0124] Take the liquid crystal compound in the following weight percentages and prepare the liquid crystal composition by the method described in the present invention. The specific proportion and the performance parameters of the obtained liquid crystal composition are shown in Table 1:

[0125] The weight percent and performance parameter of each component in the liquid crystal composition of table 1 embodiment 1

[0126]

[0127] The composition has low viscosity and fast response time, and is suitable for fast-response liquid crystal display devices.

Embodiment 2

[0129] Take the liquid crystal compound in the following weight percentages and prepare the liquid crystal composition by the method described in the present invention. The specific proportion and the performance parameters of the obtained liquid crystal composition are shown in Table 2:

[0130] The weight percent and performance parameter of each component in the liquid crystal composition of table 2 embodiment 2

[0131]

[0132]

[0133] The composition has low viscosity and fast response time, and is suitable for fast-response liquid crystal display devices.

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Abstract

The invention relates to a high-contrast liquid crystal composition. The high-contrast liquid crystal composition comprises one or several compounds with the general formula (I) as shown in descriptions. The high-contrast liquid crystal composition has the characteristics of high contrast, low viscosity, high specific resistance, good low-temperature performance, fast response speed and excellent transmittance. When the high-contrast liquid crystal composition is used in VA (Vertical Alignment), IPS (In-Plane Switching) or FFS(Fringe Field Switching)-mode displays, the display effect of the liquid crystal displays, particularly the IPS and FFS-mode displays can be obviously improved.

Description

technical field [0001] The invention relates to a high-contrast liquid crystal composition and an application thereof, belonging to the field of liquid crystal materials, and in particular to a liquid crystal composition in VA modes such as MVA / PVA / PSVA and IPS and FFS liquid crystal displays. It is especially suitable for IPS and FFS liquid crystal displays, which can effectively improve the contrast characteristics of liquid crystal displays. Background technique [0002] At present, liquid crystals are widely used in the field of information display, and at the same time, some progress has been made in the application in optical communication (S.T.Wu, D.K.Yang. Reflective Liquid Crystal Displays. Wiley, 2001). In recent years, the application fields of liquid crystal compounds have been significantly expanded to various display devices, electro-optic devices, electronic components, sensors, etc. For this reason, many different structures have been proposed, especially in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/30C09K19/44G02F1/1333
Inventor 陈海光陈卯先杭德余姜天孟田会强储士红贺树芳孙丽丽张琳
Owner BEIJING BAYI SPACE LCD MATERIALS TECH
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