Liquid crystal composition with good frequency dependence and liquid crystal display element

12024,664

18/079390

December 12, 2022

The present invention belongs to the technical field of liquid crystal materials, and in particular relates to a liquid crystal composition with good frequency dependence and a liquid crystal display element or liquid crystal display containing the liquid crystal composition. The liquid crystal composition of the present invention comprises a compound represented by Formula I, a compound represented by Formula II and a compound represented by Formula III, wherein the mass percentage content of the compound represented by Formula I is not less than 30%. The liquid crystal composition provided by the present invention has an appropriate optical anisotropy, an appropriate dielectric anisotropy, especially a relatively low rotational viscosity, a good low-temperature mutual solubility and a good reliability, especially good frequency dependence. [chemical expression included]

Shijiazhuang Chengzhi Yonghua Display Material Co., ltd. (Hebei, CN)

SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIAL CO., LTD. (Shijiazhuang, CN)

1. A liquid crystal composition with good frequency dependence, comprising a compound represented by Formula I, wherein the mass percentage content of the compound represented by Formula I in the liquid crystal composition is not less than 30%; and the liquid crystal composition further comprises one or more compounds represented by Formula II and one or more compounds represented by Formula III-A, III-B, and at least three compounds represented by Formula IV, [chemical expression included] wherein in Formula II, R 1 and R 2 each independently represent an alkoxy with a carbon atom number of 1-10 or an alkenoxy with a carbon atom number of 2-10; and when R 1 and R 2 each independently represent an alkoxy with a carbon atom number of 2-10 or an alkenoxy with a carbon atom number of 2-10, any one of the hydrogen atoms thereof can be replaced by F; and in Formula IV, R 4 represents an alkyl with a carbon atom number of 1-10 or an alkenyl with a carbon atom number of 2-10; R 4 ′ represents an alkyl with a carbon atom number of 1-10 or an alkoxy with a carbon atom number of 1-10; and [chemical expression included] represents [chemical expression included] the mass content of the compound represented by Formula II is 3-15%; and the mass percentage content of the compound represented by Formula III-A, III-B is 2-10%.

2. The liquid crystal composition according to claim 1 , wherein the liquid crystal composition comprises one or more compounds represented by Formula V: [chemical expression included] wherein in Formula V, R 5 represents an alkyl with a carbon atom number of 1-10 or an alkenyl with a carbon atom number of 2-10; R 5 ′ represents an alkyl with a carbon atom number of 1-10 or an alkoxy with a carbon atom number of 1-10; and [chemical expression included] represents [chemical expression included] and Z 1 represents a single bond, —CH 2 O— or —CH 2 CH 2 —.

3. The liquid crystal composition according to claim 1 , wherein the compound represented by Formula II in the liquid crystal composition is selected from the group consisting of compounds represented by Formulas II-A, II-B, II-C, II-D, II-E, II-F, II-G, II-H, and II-I: [chemical expression included]

4. The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises one or more compounds represented by Formula IV other than those represented by Formula I: [chemical expression included] wherein in Formula VI, R 6 and R 6 ′ each independently represent an alkyl with a carbon atom number of 1-10, an alkoxy with a carbon atom number of 1-10 or an alkenyl with a carbon atom number of 2-10; [chemical expression included] represents [chemical expression included] and n represents 1 or 2 or 3; and when n represents 2 or 3, two or three [chemical expression included]  may be the same or different.

5. The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises one or more compounds represented by Formula VII and/or one or more compounds represented by Formula VIII: [chemical expression included] wherein R 7 , R 7 ′, R 8 and R 8 ′ each independently represent an alkyl with a carbon atom number of 1-10 and an alkoxy with a carbon atom number of 1-10; and X 1 and X 2 each independently represent H or F.

6. A liquid crystal display element or a liquid crystal display, characterized by comprising the liquid crystal composition according to claim 1 , wherein the liquid crystal display element or liquid crystal display is an active matrix addressing display element or display or a passive matrix addressing display element or display.

20180320071 November 2018 Meng
20190375986 December 2019 Xing
20230183572 June 2023 Gao
20230183573 June 2023 Zhang
107674687 February 2018

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