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Liquid crystal composition and display device thereof

A technology of liquid crystal composition and compound, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, and can solve the problems of poor low-temperature storage stability, long response time, and high operating voltage

Active Publication Date: 2012-10-31
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to meet the process requirements of liquid crystal display devices, liquid crystal materials are required to have a wide range of performance parameters, and the current practical liquid crystal materials are mixed liquid crystal materials, but the optimization of various performance parameters of mixed liquid crystal materials is mutually contradictory, mutually restricted and mutually exclusive. Affected, it is difficult to meet the process performance requirements
Among the liquid crystal compositions described in EP0667555, EP0673986, DE19528106, DE19528107, WO962851, significant disadvantages are long response time, low resistivity and high operating voltage
In addition, poor storage stability at low temperature is also a defect of many existing liquid crystal materials.

Method used

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  • Liquid crystal composition and display device thereof
  • Liquid crystal composition and display device thereof
  • Liquid crystal composition and display device thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Prepare the liquid crystal composition of the present invention by each compound listed in Table 3 and the weight percentage, it is filled between the two substrates of the liquid crystal display for performance testing, and the test data are shown in the following table:

[0098] Table 3 liquid crystal composition formula and test performance thereof

[0099]

[0100] Compared with the comparative example, the liquid crystal composition has suitable refractive index anisotropy and dielectric anisotropy, and a lower threshold voltage, and has the advantages of faster response speed, good display effect, and superior power-saving performance , suitable for display devices.

Embodiment 2

[0102] The liquid crystal composition of the present invention is prepared by each compound listed in Table 4 and the weight percentage, and it is filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0103] Table 4 liquid crystal composition formula and test performance thereof

[0104]

[0105]

[0106] Compared with the comparative example, the liquid crystal composition has suitable dielectric anisotropy and refractive index anisotropy, lower threshold voltage and rotational viscosity, and has the advantages of fast response speed, good display effect, and excellent energy saving. Electrical properties, suitable for display devices.

Embodiment 3

[0108] The liquid crystal composition of the present invention is prepared by each compound listed in Table 5 and the weight percentage, and it is filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0109] Table 5 liquid crystal composition formula and test performance thereof

[0110]

[0111] Compared with the comparative example, the liquid crystal composition has suitable refractive index anisotropy and dielectric anisotropy, and a lower threshold voltage, and has the advantages of faster response speed, good display effect, and reduced display power consumption. Applicable to display devices.

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Abstract

The invention provides a liquid crystal composition and an application thereof. The liquid crystal composition comprises a compound which is 1-50% of the total weight of the liquid crystal composition and is shown as a formula (I), a compound which is 1-60% of the total weight of the liquid crystal composition and is shown as a formula (II) and a compound which is 20-90% of the total weight of the liquid crystal composition and is shown as a formula (III). The liquid crystal composition has a low rotary viscosity and a relatively high responding speed. The invention further provides a liquid crystal display containing the liquid crystal composition.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a liquid crystal composition with proper optical anisotropy, fast response speed and good storage stability at low temperature and its application. Background technique [0002] Liquid crystal material is a mixture of organic rod-shaped small molecular compounds that have both fluidity of liquid and anisotropy of crystal at a certain temperature. Liquid crystal materials are mainly used as dielectrics in displays because the optical properties of such substances can be changed by an applied voltage. According to the classification of liquid crystal display, the liquid crystal composition can be divided into twisted nematic type (TN type), super twisted nematic type (STN type), thin film transistor type (TFT type), guest-host type (GH type), dynamic scattering type ( DS type) and other types, among which the most common display element is based on the Schadt-Helfrich effect and has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44C09K19/32C09K19/12C09K19/30G02F1/1333
Inventor 韩文明谭玉东马定福王毅明倪守东陈法兵纪金山王景
Owner JIANGSU HECHENG DISPLAY TECHCO
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