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Patent
Shijiazhuang Chengzhi Yonghua Display Materials Co. | Date: 2016-05-20

The present disclosure discloses a liquid crystal compound and a liquid crystal composition. The liquid crystal compound has a general structural formula as represented by formula I. The liquid crystal composition provided by the present disclosure has a lower rotary viscosity _(1), can achieve a quick response, and further has an appropriate dielectric anisotropy , an appropriate optical anisotropy n, a high stability to heat and light, a high VHR numerical value especially in the case where the liquid crystal is under harsh conditions, and a stability to electric field and electromagnetic radiation. As a liquid crystal material for use in thin film transistor techniques (TFT-LCD), the material further has the properties of a wider nematic phase temperature range, an appropriate birefringence anisotropy, a very high electrical resistivity, a good anti-ultraviolet performance, a high charge holding rate, a low vapor pressure etc.


Patent
Shijiazhuang Chengzhi Yonghua Display Materials Co. | Date: 2016-11-02

Disclosed is a liquid crystal medium containing a 2,4-diflurophenyl compound and the use thereof. The liquid crystal composition comprises the compounds as represented by formula I and formula II. The liquid crystal composition has a low rotary viscosity, good chemical and thermal stability and a fast response speed, it is suitable for a liquid crystal display device and particularly suitable for the use in an active matrix display of a TN, IPS or FFS mode.


Patent
Shijiazhuang Chengzhi Yonghua Display Materials Co. | Date: 2013-08-23

A liquid crystal composition having a negative dielectric anisotropy is disclosed. The liquid crystal composition includes compounds of Formulas I to IV. The composition has a low threshold voltage, a low rotary viscosity, a high resistivity, a high voltage holding ratio, and a good high temperature and UV stability. The LC medium has the advantage of obviously reduced response time after polymerization under UV irradiation, thus having important application value.


Patent
Shijiazhuang Chengzhi Yonghua Display Materials Co. | Date: 2014-07-03

This invention relates to liquid crystal compound of formula I containing benzene derivatives group that hydrogen substituted by deuterium. Liquid crystal compounds of formula I have not only large positive dielectric anisotropy, but also moderate optical anisotropy and driving voltage, thereby having great significance to formulate a liquid crystal mixture. A liquid crystal mixture containing such type of liquid crystal compounds can be applied in various display devices, which is particularly suitable for TN and STN display devices, and can also be used in IPS and VA display devices.


This invention relates to liquid crystal compound of formula I containing a difluoromethyleneoxy linking group that hydrogen substituted by deuterium and therefore being very suitable for formulating a liquid crystal mixture. A liquid crystal mixture containing such type of liquid crystal compounds can be applied in various display devices.


A liquid crystal compound containing cyclobutyl and a linking group difluoromethyleneoxy, and a preparation method and use thereof are disclosed. The compound is as shown in Formula I. The liquid crystal compound containing cyclobutyl as a terminal group and difluoromethyleneoxy (CF_(2)O) as a linking group in the molecular structure of Formula I according to the present invention, has not only a high dielectric anisotropy, but also importantly an extremely fast response speed and a high clearing point, which are of great significance for the formulation of a liquid crystal mixture.


Patent
Shijiazhuang Chengzhi Yonghua Display Materials Co. | Date: 2015-05-18

The present invention discloses liquid crystal compounds having dibenzopyran derivatives with cycloalkyl groups, and preparation methods and application thereof. The liquid crystal compounds having dibenzopyran derivatives with cycloalkyl terminal groups, shown in formula I, exhibit better miscibility and a very large negative dielectric constant, compared to those having a flexible alkyl chain as a terminal group, therefore the compounds of the present invention, shown in formula I, may improve the miscibility of liquid crystal compounds and broaden the application range of liquid crystal mixtures. In addition, the compounds may also increase the negative dielectric constants of liquid crystal mixtures, having an important application value.


Patent
Shijiazhuang Chengzhi Yonghua Display Materials Co. | Date: 2013-08-30

The invention relates to liquid-crystalline compounds of the formula (I) having a CF_(2)0- bridge. The invention also relates to liquid-crystalline media prepared therewith and to liquid-crystal display devices (LC displays) containing these media. This kind of compounds has the excellent characteristics including a large dielectric anisotropy, fast response time and high clearing point, and good miscibility at low temperature in the same time which has important significance in new TFT LC mixture.


Patent
Shijiazhuang Chengzhi Yonghua Display Materials Co. | Date: 2015-05-22

The present invention is directed to compounds of the following General Formula I. The cyclopropyl-bearing liquid crystal compounds of Formula I of the present invention have a positive or negative dielectric anisotropy (), an appropriate optical anisotropy (n), an appropriate clearing point (CP), good low-temperature miscibility with other liquid crystals, a low rotary viscosity, and good UV stability and high-temperature thermal stability, and therefore have good use value. The compounds of the present invention can be used for preparing positive and negative liquid crystal compositions and can also be employed in passive and active matrix displays.


A negative dielectric anisotropic liquid crystal compound containing 2,3-difluorophenyl, and a preparation method and use thereof are disclosed. The compound has a general structural formula as shown in Formula I. The negative dielectric anisotropic liquid crystal compound has a negative dielectric anisotropy (), and has cyclobutyl or cyclopentyl as a terminal group. Compared with conventional liquid crystal compounds with a flexible alkyl chain as a terminal group, the compound of Formula I according to the present invention has the advantage of high clearing point, and enables extension of the application range of a liquid crystal mixture because a positive correlation exists between the clearing points of the liquid crystal mixture and monomer liquid crystal compounds. In addition, the compound can increase the absolute value of the negative dielectric constant of the liquid crystal mixture, thus having an important application value.

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