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Liquid crystal composition containing butyl and alkyl compounds

A technology of liquid crystal compositions and compounds, applied in the directions of liquid crystal materials, chemical instruments and methods, instruments, etc., to achieve the effects of low voltage, good compatibility, and fast response time

Active Publication Date: 2015-05-20
BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention relates to the development and use of a class of cyclobutane difluoromethylene oxide bridge ether monomers in liquid crystal compositions. It is the first time for the development and use of liquid crystals, so there is no report on similar liquid crystal compositions

Method used

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  • Liquid crystal composition containing butyl and alkyl compounds
  • Liquid crystal composition containing butyl and alkyl compounds
  • Liquid crystal composition containing butyl and alkyl compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Prepare the liquid crystal composition of the present invention according to each compound listed below and the weight percentage content,

[0067]

[0068] The above liquid crystal composition was filled between the two substrates of the liquid crystal display for performance testing. The test results were: Cp: 90°C; S-N: ≤ -40°C; △n: 0.100; △ε: 5.0; τ: 16ms; V 10 : 2.5v; V 90 : 3.5v; γ 1 : 60mPa·s.

[0069] The liquid crystal composition has moderate birefringence, suitably high positive dielectric, very low rotational viscosity and fast response time, so it is very suitable for fast-response TN-TFT and IPS-TFT displays.

Embodiment 2

[0071] Prepare the liquid crystal composition of the present invention according to each compound listed below and the weight percentage content,

[0072]

[0073] The above liquid crystal composition was filled between the two substrates of the liquid crystal display for performance testing. The test results were: Cp: 102°C; S-N: ≤-40°C; △n: 0.100; △ε: 7.2; τ: 23ms; V 10 : 2.3v; V 90 : 3.2v; γ 1 : 80.5mPa·s.

[0074] The liquid crystal composition has moderate birefringence, suitably high positive dielectric, very low rotational viscosity and fast response time, so it is very suitable for fast-response TN-TFT displays.

Embodiment 3

[0076] Prepare the liquid crystal composition of the present invention according to each compound listed below and the weight percentage content,

[0077]

[0078]

[0079] The above liquid crystal composition was filled between the two substrates of the liquid crystal display for performance testing. The test results were: Cp: 100°C; S-N: ≤ -40°C; Δn: 0.100; Δε: 4.4; τ: 15ms; V 10 : 3.0v; V 90 : 4.2v; γ 1 : 55mPa·s.

[0080] The liquid crystal composition has moderate birefringence, appropriately high positive dielectric, high clearing point, very low rotational viscosity, and very fast response time, so it is very suitable for fast-response IPS-TFT displays.

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Abstract

The invention relates to a liquid crystal composition containing butyl and alkyl compounds. The liquid crystal composition comprises a component A comprising one or more dielectric positive compounds as shown in general formulae I, a component B comprising one or more dielectric positive compounds as shown in general formulae II, a component C comprising one or more dielectric positive compounds as shown in general formulae III, and a component D comprising one or more dielectric positive compounds as shown in general formulae IV. The liquid crystal composition provided by the invention is excellent in performance, has the characteristics of low rotary viscosity, quick response time, wide nematic phase range, proper optical anisotropy and the like, is suitable for active matrix electro-optical elements and liquid crystal displays, and can be used for manufacturing TFT-LCDs (thin film transistor-liquid crystal displays); parameters in the general formulae have meanings given in specifications.

Description

technical field [0001] The invention relates to a liquid crystal composition containing a dielectrically positive liquid crystal compound, in particular to a liquid crystal composition containing a cyclobutanyl compound used in active matrix displays, especially TN, IPS and FFS displays. Background technique [0002] Liquid crystal display elements are divided into the following modes according to the display mode: twisted nematic (TN) mode, super twisted nematic (STN) mode, in-plane mode (IPS), and vertical alignment (VA) mode. Regardless of the display mode, the liquid crystal composition needs to have stable chemical and physical properties, low viscosity, suitable Δε, suitable refractive index Δn, and good compatibility with other liquid crystal compounds. [0003] With the maturity of TFT technology in the early 1990s, color liquid crystal flat panel displays developed rapidly. In less than 10 years, TFT-LCD has rapidly grown into a mainstream display, which is insepara...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/44C09K19/34C09K19/30G02F1/1333
Inventor 华瑞茂夏治国韩耀华张建立
Owner BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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