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A kind of positive and negative mixed liquid crystal composition and its application

A technology of mixing liquid crystals and compositions, applied in liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of slow response time, high viscosity of negative liquid crystals, etc., and achieve low rotational viscosity performance and large dielectric anisotropy Effect

Active Publication Date: 2020-10-27
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When the positive liquid crystal is used in IPS / FFS display mode, it can obtain fast response and good reliability; while the negative liquid crystal can obtain higher transmittance when it is used in IPS / FFS display mode, but due to the negative liquid crystal Higher viscosity, so slower response time

Method used

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  • A kind of positive and negative mixed liquid crystal composition and its application
  • A kind of positive and negative mixed liquid crystal composition and its application
  • A kind of positive and negative mixed liquid crystal composition and its application

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preparation example Construction

[0265] The preparation of liquid crystal composition in the embodiment of the present invention all adopts following method:

[0266] 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 adding. Usually, the liquid crystal compound is weighed and mixed in order of melting point from high to low. Heat and stir at 60-100°C to make each component melt evenly, then filter, spin evaporate, and finally package to obtain the target sample.

[0267] Unless otherwise stated, percentages in this context are by weight and all temperatures are given in degrees Celsius. Use the following abbreviations:

[0268] Δn is optical anisotropy (25°C), Δε is dielectric anisotropy (25°C, 1000Hz), ε ⊥ is the vertical dielectric (25°C, 1000Hz), Cp is the clearing point of the liquid crystal composit...

Embodiment 1

[0282] Take the liquid crystal compound in the following weight percentages and prepare the liquid crystal composition by the method described in the present invention. The specific proportion and the performance parameters of the obtained liquid crystal composition are shown in Table 1:

[0283] The weight percent and performance parameter of each component in the liquid crystal composition of table 1 embodiment 1

[0284] category components weight percentage (%) performance parameters parameter value I 3SCWO2 10 △n 0.104 II 3DUQKF 15 Δε +8.8 II 2DPUQKF 6 ε⊥ 5.0 II 3DPUQKF 6 gamma 1 70 III 3CCV 42 Cp 80 IV VCCP1 9 K11 10.8 VIII 3CPGUOCF3 10 K22 5.4 VIII 3PPGUF 2 K33 13.2

Embodiment 2

[0286] Take the liquid crystal compound in the following weight percentages and prepare the liquid crystal composition by the method described in the present invention. The specific proportion and the performance parameters of the obtained liquid crystal composition are shown in Table 2:

[0287] The weight percent and performance parameter of each component in the liquid crystal composition of table 2 embodiment 2

[0288] category components weight percentage (%) performance parameters parameter value I 3SCWO2 6 △n 0.101 II 3CDUQKF 13 Δε +12.0 II 3PUQKF 10 ε ⊥

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Abstract

The invention relates to the field of liquid crystal materials, in particular to a positive and negative mixed liquid crystal combination and application thereof. The combination at least comprises a compound represented by a general formula I and at least comprises a compound represented by a general formula II. The liquid crystal combination has the characteristics of low viscosity, high resistivity, good low-temperature solubility, high response speed and excellent transmittance and can be used for fast response liquid crystal display of various display modes. At present, FFS and IPS become the most mainstream display modes, but the problem of low transmittance of FFS and IPS becomes a key problem to be solved; through experiments, it is found that the liquid crystal combination with large vertical dielectrics has high transmittance, and therefore the effect of improving brightness without increasing electric energy consumption can be achieved. The liquid crystal combination has the large vertical dielectrics, so that the transmittance characteristic of a liquid crystal display can be effectively improved, especially in displays of FFS and IPS display modes. The formulas are shown in the description.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials, and in particular relates to a positive and negative mixed liquid crystal composition and its application in liquid crystal displays. Background technique [0002] Display is the process of converting electrical signals (data information) into visible light (visual information), and the device that completes the display is the Man-Machine Interface (MMI). A flat panel display (Flat panel Display, FPD) is currently the most popular type of display device. Liquid Crystal Display (LCD) is the first product developed and commercialized among FPDs. Currently, a Thin Film Transistor Liquid Crystal Display (TFT-LCD) has become a mainstream product in LCD applications. [0003] In terms of working principle, LCD is a display device that uses the light emitted by the backlight, through polarizers and liquid crystal cells (liquid crystal molecules), to generate light and shade correspond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/30C09K19/42C09K19/34C09K19/12C09K19/44G02F1/1333
CPCC09K19/12C09K19/30C09K19/3003C09K19/3402C09K19/42C09K19/44C09K2019/122C09K2019/3004C09K2019/3006C09K2019/3422G02F1/13338
Inventor 陈卯先王杰储士红未欣陈海光姜天孟郭云鹏袁瑾伍嘉琦田会强
Owner BEIJING BAYI SPACE LCD MATERIALS TECH
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