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Liquid crystal composition with low threshold and high response speed

A liquid crystal composition, fast response technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of increasing device drive voltage, affecting display effect, slow response speed, etc., and achieve the effect of fast response speed

Active Publication Date: 2013-08-14
XIAN CAIJING OPTO ELECTRICAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the maturity of TFT-LCD technology, technical problems such as viewing angle, resolution, color saturation and brightness have been successfully solved, and the display performance is comparable to that of CRT displays. Gradually occupy the mainstream position, but due to the limitations of liquid crystal materials, TFT-LCD still has defects such as high voltage and slow response speed: high voltage will increase the driving voltage of the device and increase energy consumption, which is not conducive to environmental protection and energy saving; Slow speed will affect the display effect, and high-definition display cannot be realized
[0004] It is difficult for a single-component liquid crystal to meet the requirements of a display device, and the required requirements can be achieved by mixing a variety of monomers with different properties. How to balance the various parameters of the liquid crystal composition to obtain a liquid crystal composition with suitable performance in all aspects is often very difficult

Method used

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  • Liquid crystal composition with low threshold and high response speed
  • Liquid crystal composition with low threshold and high response speed
  • Liquid crystal composition with low threshold and high response speed

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Experimental program
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Effect test

preparation example Construction

[0122] The preparation of liquid crystal composition all adopts following method:

[0123] Using the thermal dissolution method commonly used in the industry, first use a balance to weigh each monomer in the liquid crystal composition by weight percentage, add the liquid first and then the solid in the order of addition, there is no specific requirement for the order of solid addition, and heat and stir at 100°C The components are melted and mixed evenly, then filtered, degassed, and finally packaged to obtain the target sample. In addition, it is also possible to mix the solutions of each component in an organic solvent, such as acetone, chloroform, methanol, etc., remove the solvent after thorough mixing, such as by distillation, etc., and then filter, degas, and package The target sample can be obtained.

[0124] In this embodiment, the liquid crystal monomer components involved adopt the following notation method:

[0125]

[0126] In this embodiment, the components o...

Embodiment 1

[0129] The components by weight percentage shown in Table 1 are used to prepare the liquid crystal composition, and its performance parameters are shown in Table 1:

[0130] Table 1: The ratio and performance parameters of the liquid crystal composition

[0131]

[0132]

Embodiment 2

[0134] The components by weight percentage shown in Table 2 are used to prepare the liquid crystal composition, and its performance parameters are shown in Table 2:

[0135] Table 2: The ratio and performance parameters of the liquid crystal composition

[0136]

[0137]

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Abstract

The invention discloses a liquid crystal composition with a low threshold and a high response speed. The liquid crystal composition is prepared from the following components in percentage by weight: 15%-40% of component A, 20%-65% of component B, 10%-35% of component C and 5%-15% of component D, wherein the sum of all the components in percentage by weight is 100%. The liquid crystal composition has the characteristics of low threshold voltage, short total response time (t=ton+toff), wide nematic phase temperature, appropriate refraction anisotropy, and the like; and the liquid crystal composition is applicable to a liquid crystal displayer with positive dielectric anisotropy, a TFT (Thin Film Transistor) liquid crystal display mode and a liquid crystal display of an IPS (In-Place Switching) mode.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials, and in particular relates to a liquid crystal composition with low threshold and fast response speed. Background technique [0002] Liquid crystal display products require liquid crystal materials to have a wide nematic phase temperature range, low driving voltage, suitable refractive index and high dielectric anisotropy, etc. At present, liquid crystal displays generally require that the refractive anisotropy (Δn) be between 0.080 and 0.100, the threshold voltage (Vth) <2V, the saturation voltage (Vsat) <3V, and the response time (Rt, sum of rise and fall time) <30ms, And have a certain nematic phase temperature width: clearing point (T NI )>65°C, crystallization point<-20°C. [0003] With the maturity of TFT-LCD technology, technical problems such as viewing angle, resolution, color saturation and brightness have been successfully solved, and the display perfor...

Claims

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Application Information

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IPC IPC(8): C09K19/12C09K19/20C09K19/30C09K19/44
Inventor 胡艳华黄善兴杜渭松张广平刘建韬邓登甘宁别国军柴晓燕刘俞彤张鸽张澎钊王线线
Owner XIAN CAIJING OPTO ELECTRICAL SCI & TECH
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