Negative dielectric anisotropic liquid crystal composition and use thereof

A liquid crystal composition and anisotropic technology, applied in liquid crystal materials, nonlinear optics, optics, etc., can solve problems such as ratio viewing angle dependence defects, achieve good low-temperature mutual solubility, improve viewing angle difference, and high contrast.

Active Publication Date: 2012-05-02
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The currently used liquid crystal display is mainly TN type, and this nematic mode has the defect of viewing angle dependence of contrast ratio, while the so-called VA vertical alignment display has a more wide viewing angle

Method used

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  • Negative dielectric anisotropic liquid crystal composition and use thereof
  • Negative dielectric anisotropic liquid crystal composition and use thereof
  • Negative dielectric anisotropic liquid crystal composition and use thereof

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0055] The preparation of liquid crystal sample in the embodiment of the present invention all adopts following method:

[0056] 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.

[0057] Unless otherwise stated, percentages in this context are by weight and all temperatures are given in degrees Celsius. The following abbreviations are used: Δn is the optical anisotropy, n 0 is the refractive index (589nm, 20°C). η...

Embodiment 1

[0063] Take the liquid crystal compound in the following weight percentages and prepare a liquid crystal composition according to the method described in the present invention. The specific proportion and the properties of the obtained liquid crystal composition are shown in Tables 1.1 and 1.2:

[0064] The weight percentage (%) of each component in the liquid crystal composition of table 1.1

[0065] Component compound

weight percentage (%)

IB-2

16

IB-4

15

IIB-1

12

IIB-2

10

IIB-4

10

IIA-1

11

IIA-2

11

IVA-1

11

IB-1

2

V-1

1

V-2

1

[0066] Table 1.2 Properties of Liquid Crystal Compositions

[0067] property parameters

Embodiment 2

[0069] Take the liquid crystal compound in the following weight percentages and prepare a liquid crystal composition according to the method described in the present invention. The specific proportion and the properties of the obtained liquid crystal composition are shown in Tables 2.1 and 2.2:

[0070] The weight percent (%) of each component in the liquid crystal composition of table 2.1

[0071] Component compound

weight percentage (%)

IA-1

15

IB-3

12

IIB-1

10

IIB-2

12

IIB-3

11

IIA-3

10

IIA-4

11

IVA-2

15

IB-1

2

V-1

1

V-2

1

[0072] Table 2.2 Properties of Liquid Crystal Compositions

[0073] property parameters

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PUM

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Abstract

The invention relates to the field of liquid crystal display, and specially, relates to a negative dielectric anisotropic liquid crystal composition and a use thereof. The negative dielectric anisotropic liquid crystal composition comprises 1 to 50% of a compound I, 1 to 70% of a compound II, 0 to 50% of a compound III, 1 to 50% of a compound IV and 0 to 20% of a compound V. The negative dielectric anisotropic liquid crystal composition has excellent performances, short response time and a high contrast ratio, and can be utilized for multiple display modes.

Description

technical field [0001] The invention relates to the field of liquid crystals, in particular to a liquid crystal composition with negative dielectric anisotropy. The liquid crystal composition is suitable for liquid crystal display devices. Background technique [0002] In 1888, Austrian botanist Friedrich Reinitzer discovered the first liquid crystal material, cholesterol benzoate (cholesteryl benzoate), which is a liquid crystal, which means that a substance has both the fluidity of a liquid and a certain arrangement characteristic similar to a crystal. M.Born (1916) and K.Lichtennecker (1926) discovered and studied the dielectric anisotropy of liquid crystals. In 1932, W.Kast divided the nematic phase into two categories, positive and negative. In 1927, V.Freedericksz and V.Zolinao discovered that the nematic liquid crystal was deformed and had a voltage threshold (Freederichsz transition) under the action of an electric field (or magnetic field). This finding provides ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/30C09K19/12G02F1/1333G02F1/139
Inventor 杭德余陈海光姜天孟杨春艳王广涛田会强储士红
Owner BEIJING BAYI SPACE LCD MATERIALS TECH
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