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Liquid crystal composition containing dielectric positive liquid crystal compound

A liquid crystal composition, positive liquid crystal technology, applied in the directions of liquid crystal materials, nonlinear optics, chemical instruments and methods, etc., to achieve the effect of reducing threshold voltage, low voltage, and improving low temperature mutual solubility

Inactive Publication Date: 2014-02-05
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention relates to the development and use of two types of difluoromethylene oxide bridge ether compounds in liquid crystal compositions, the same liquid crystal composition has not been reported

Method used

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  • Liquid crystal composition containing dielectric positive liquid crystal compound
  • Liquid crystal composition containing dielectric positive liquid crystal compound
  • Liquid crystal composition containing dielectric positive liquid crystal compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Prepare the liquid crystal composition of the present invention according to each compound listed below and the weight percentage content,

[0063]

[0064] 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.

[0065] 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

[0067] Prepare the liquid crystal composition of the present invention according to each compound listed below and the weight percentage content,

[0068]

[0069] 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.

[0070] 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

[0072] Prepare the liquid crystal composition of the present invention according to each compound listed below and the weight percentage content,

[0073]

[0074]

[0075] 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.

[0076] The liquid crystal composition has moderate birefringence, moderately high positive dielectric, high clearing point, very low rotational viscosity, and very fast response time, so it is very suitable for fast-response TN-TFT or IPS-TFT displays .

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Abstract

The invention relates to a liquid crystal composition containing a dielectric positive liquid crystal compound, comprising a component A consisting of a compound with a general formula I, a component B consisting of a compound with a general formula II, a component C consisting of a compound with a general formula III, a component D consisting of a compound with a general formula IV, and a component E consisting of a compound with a general formula V. The liquid crystal composition has excellent performances, applies to an active matrix electrooptical element and an LCD, and can be used for manufacturing a TFT-LCD.

Description

technical field [0001] The invention belongs to the field of liquid crystal compounds, and relates to a liquid crystal composition containing dielectrically positive liquid crystal compounds used in active matrix displays of TN, IPS and FFS modes. Background technique [0002] Liquid crystal display elements require liquid crystal compositions with stable chemical and physical properties, low viscosity, suitable Δε, suitable refraction rate Δn, and good compatibility with other liquid crystal compounds. 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 inseparable from its advantages. [0003] The advantages of TFT-LCD mainly include: good use characteristics, low voltage application, low driving voltage; flat, light and thin, saving a lot of raw materials and space; low power consumption; display quality from the simplest mon...

Claims

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Application Information

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IPC IPC(8): C09K19/44C09K19/42G02F1/1333
Inventor 华瑞茂夏治国韩耀华张建立
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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