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Nematic liquid crystal composition

A liquid crystal composition and compound technology, applied in liquid crystal materials, optics, instruments, etc., can solve the problems of insufficient low voltage, insufficient fast response of TFT-LCD, insufficient charge retention rate, etc., achieve low viscosity, low driving voltage, high Effects of resistivity and voltage retention

Active Publication Date: 2013-08-07
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the liquid crystal material itself, TFT-LCD still has many defects such as insufficient response, insufficient voltage, and insufficient charge retention rate.

Method used

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  • Nematic liquid crystal composition
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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0065] 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 addition. Usually, the liquid crystal compound is weighed and mixed in the order of melting point from high to low. Heating and stirring at 60-100 ℃ to make the components melt evenly, then filter, rotary steam, and finally package to obtain the target sample. Besides, the method of patent CN101502767A can also be used to prepare uniform liquid crystal.

[0066] In addition, the optically active components used in the present invention all come from Beijing Bayi Space-Time Liquid Crystal Material Technology Co., Ltd., and the optically active components:

[0067] The optically active components are:

[0068]

Embodiment 1

[0070] The following weight percentages of the liquid crystal compounds are taken and the liquid crystal compositions are prepared by the method described in the present invention. The specific proportions and properties of the obtained liquid crystal compositions are shown in Tables 1.1 and 1.2:

[0071] Table 1.1 Weight percentage (%) of each component in the liquid crystal composition

[0072] Component compounds

category

Weight percentage (%)

5CP-F

I

10

3PP-F.F

I

10

2PP-FP3

II

2

2PP-FP5

II

2

3PP-FP5

II

2

2PP-C 2 H 4 -P-F

VI

8

5PP-C 2 H 4 -P-F

VI

8

3CPP-F.F

III

9

5CPP-F.F

III

9

2CCP-F.F

IV

10

3CCP-F.F

IV

6

4CCP-F.F

IV

6

3CCP-OCF3

V

3

5CCP-OCF3

V

3

3CCPP-F.F

VII

7

2CCP-F.OCF3

V

...

Embodiment 2

[0076] The following weight percentages of the liquid crystal compounds are taken and the liquid crystal compositions are prepared by the method described in the present invention. The specific proportions and properties of the obtained liquid crystal compositions are shown in Tables 2.1 and 2.2:

[0077] Table 2.1 The weight percentage (%) of each component in the liquid crystal composition

[0078] Component compounds

category

Weight percentage (%)

5CP-F

I

9

5CP-Cl

I

4

[0079] 3PP-F.F

I

12

2PP-FP3

II

2

2PP-FP5

II

3

3PP-FP5

II

3

2PP-C 2 H 4 -P-F

VI

7

5PP-C 2 H 4 -P-F

VI

7

3CPP-F.F

III

8

5CPP-F.F

III

8

2CCP-F.F

IV

10

3CCP-F.F

IV

6

4CCP-F.F

IV

8

3CCPP-F.F

VII

7

3CCP-F.OCF3

V

6

...

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Abstract

The invention relates to a nematic liquid crystal composition, which comprises: (1) 1 to 30 weight percent of one or more of compounds I; (2) 1 to 30 weight percent of one or more of compounds II; (3) 1 to 40 weight percent of one or more of compounds III; (4) 1 to 50 weight percent of one or more of compounds IV; (5) 1 to 20 weight percent of one or more of compounds V; (6) 0 to 20 weight percent of one or more of compounds VI; (7) 0 to 20 weight percent of one or more of compounds VII; and (8) 0.05 to 0.5 weight percent of rotator component. The nematic liquid crystal composition disclosed by the invention has good properties, and has low viscosity, low voltage, high resistivity and voltage holding rate, and different threshold voltage and delta n property. The nematic liquid crystal composition is particularly suitable for thin film transistor (TFT) liquid crystal displays.

Description

technical field [0001] The invention relates to the field of liquid crystal materials. Specifically, it relates to a nematic liquid crystal composition with low viscosity, large Δn value, high charge retention rate, low threshold voltage and fast response, which is suitable for TFT liquid crystal display. 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 the field of nematic liquid crystals, and nematic liquid crystal compounds have been most widely used in flat panel displays so far. Especia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/44C09K19/30C09K19/12C09K19/14C09K19/54G02F1/1333
Inventor 陈海光姜天孟杭德余杨春燕王广涛田会强储士红
Owner BEIJING BAYI SPACE LCD MATERIALS TECH