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

A technology of liquid crystal composition and mixed liquid crystals, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, and can solve the problems of increasing backlight energy consumption and reducing backlight life.

Active Publication Date: 2019-07-19
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main function of the liquid crystal display is to act as a light switch. After the light passes through the liquid crystal layer, the light loss is only about 6% of the original. Therefore, in order to obtain a brighter display effect, the brightness of the backlight must be increased, which will increase the energy consumption of the backlight. and reduce backlight lifetime

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

[0273] The preparation of the liquid crystal composition in the examples of the present invention adopts the following method: the preparation of the uniform liquid crystal adopts the thermal dissolution method commonly used in the industry, and first weighs the liquid crystal compound by weight percentage with a balance, wherein there is no specific requirement for the order of weighing and adding, usually Liquid crystal compounds are weighed and mixed in order of melting point from high to low, heated and stirred at 60-100°C to make each component melt evenly, then filtered, rotary evaporated, and finally packaged to obtain the target sample.

[0274] Unless otherwise stated, percentages in this context are by weight and all temperatures are given in degrees Celsius. Use the following abbreviations:

[0275] 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 cryst...

Embodiment 1

[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 1:

[0287] The weight percent and performance parameter of each component in the liquid crystal composition of table 1 embodiment 1

[0288] category component Weight percentage (%) performance parameter parameter value I 3DUQKF 15 △n 0.102 I 2DPUQKF 9 Δε 8.9 I 3DPUQKF 8 ε ⊥

Embodiment 2

[0290] 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:

[0291] The weight percent and performance parameter of each component in the liquid crystal composition of table 2 embodiment 2

[0292] category component Weight percentage (%) performance parameter parameter value I 3CDUQKF 13 △n 0.097 I 3PUQKF 10 Δε 12 I 2APUQKF 10 ε ⊥

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Abstract

The invention provides a positive and negative mixed liquid crystal combination. The liquid crystal combination has large vertical dielectrics, so that the transmittance characteristic of a liquid crystal display can be effectively improved; a first-class compound is added in the liquid crystal combination to increasing parallel dielectrics of the liquid crystal combination, a second-class compound with negative dielectric anisotropy is added to increasing the vertical dielectrics of the combination, a third-class compound is further utilized to reduce the rotational viscosity of the liquid crystal combination, and therefore the liquid crystal combination with quick response and high transmittance is achieved. The liquid crystal combination is suitable for TN, IPS, FFS type liquid crystal displays, and especially suitable for the IPS and FFS type liquid crystal displays.

Description

technical field [0001] The invention relates to a liquid crystal composition, which belongs to the field of liquid crystal display materials, in particular to a positive and negative mixed liquid crystal composition with high transmittance and its application. Background technique [0002] At present, liquid crystals are widely used in the field of information display, and some progress has also been made in the application of optical communication (S.T.Wu, D.K.Yang.Reflective Liquid Crystal Displays.Wiley, 2001). In recent years, the application fields of liquid crystal compounds have been significantly expanded to various display devices, electro-optical devices, electronic components, sensors, and the like. To this end, many different structures have been proposed, especially in the field of nematic liquid crystals, which have so far been the most widely used in flat panel displays. Especially in TFT active matrix systems. [0003] Liquid crystal display has experienced...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/34C09K19/12C09K19/44G02F1/1333
CPCC09K19/12C09K19/3402C09K19/3405C09K19/44C09K2019/122C09K2019/3422G02F1/1333
Inventor 王杰储士红未欣陈卯先陈海光姜天孟郭云鹏袁瑾伍嘉琦苏学辉
Owner BEIJING BAYI SPACE LCD MATERIALS TECH
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