LIQUID CRYSTAL COMPOSITION AND DISPLAY DEVICE THEREOF

• US 20200131440A1
• Filed: 10/03/2019
• Published: 04/30/2020
• Est. Priority Date: 10/30/2018
• Status: Active Grant

• Current Assignee: Jiangsu Hecheng Display Technology Co., Ltd. (PhiChem Corp.)
• Original Assignee: Jiangsu Hecheng Display Technology Co., Ltd. (PhiChem Corp.)
• Inventors: Yao, Lifang, He, Di, Jin, Rui
• Granted Patent: US 11,299,674 B2
• Time in Patent Office: Days
• CPC Class Codes: C09K 19/062 containing one non-condensed benzene ring
• CPC Class Codes: C09K 19/12 at least two benzene rings directly linked, e.g. biphenyls
• CPC Class Codes: C09K 19/3003 Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
• CPC Class Codes: C09K 19/3028 in which at least two rings are linked by a carbon chain containing carbon to carbon single bonds
• CPC Class Codes: C09K 19/3066 in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
• CPC Class Codes: C09K 19/3402 having oxygen as hetero atom sugars C09K19/0422
• CPC Class Codes: C09K 2019/0444 characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group
• CPC Class Codes: C09K 2019/0466 the linking chain being a -CF2O- chain
• CPC Class Codes: C09K 2019/123 Ph-Ph-Ph
• CPC Class Codes: C09K 2019/3009 Cy-Ph
• CPC Class Codes: C09K 2019/301 Cy-Cy-Ph
• CPC Class Codes: C09K 2019/3016 Cy-Ph-Ph
• CPC Class Codes: C09K 2019/3024 Ph-Cy-Cy-Ph
• CPC Class Codes: C09K 2019/3027 Compounds comprising 1,4-cyclohexylene and 2,3-difluoro-1,4-phenylene
• CPC Class Codes: C09K 2019/3037 Cy-Cy-C2H4-Ph
• CPC Class Codes: C09K 2019/3422 the heterocyclic ring being a six-membered ring

Abstract

The present invention provides a liquid crystal composition comprising: at least one compound of general Formula I; at least one compound of general Formula II; at least one compound of general Formula M and at least one compound of general Formula N. The present invention also provides a liquid crystal display device comprising the liquid crystal composition. The liquid crystal composition provided in the present invention has a higher optical anisotropy, a higher clearing point, a higher dielectric anisotropy, a high transmittance and a larger average elastic constant. When the liquid crystal composition is used in the IPS liquid crystal display device, the transmittance of the display device can be effectively improved, so that the display device has a good display performance while also having good energy-saving and environment-friendly characteristics.

Claims

1. A liquid crystal composition comprising:

at least one compound of general Formula I

2. The liquid crystal composition according to claim 1, wherein ring

3. The liquid crystal composition according to claim 2, wherein the compound of general Formula I is selected from a group consisting of the following compounds:

4. The liquid crystal composition according to claim 1, wherein the compound of general Formula I provides 0.1%-60% by weight of the total weight of the liquid crystal composition.

5. The liquid crystal composition according to claim 1, wherein R_A1 represents C_1-8 linear or branched alkyl or alkoxy, or C_2-8 linear or branched alkenyl or alkenoxy.

6. The liquid crystal composition according to claim 1, wherein ring

7. The liquid crystal composition according to claim 1, wherein the compound of general Formula II provides 1%-75% by weight of the total weight of the liquid crystal composition.

8. The liquid crystal composition according to claim 1, wherein R_N1 and R_N2 each independently represents C_1-8 linear or branched alkyl or alkoxy, or C_2-8 linear or branched alkenyl or alkenoxy;

ring

9. The liquid crystal composition according to claim 8, wherein the compound of general Formula N is selected form a group consisting of the following compounds:

10. The liquid crystal composition according to claim 1, wherein the compound of general Formula N provides 0.1%-50% by weight of the total weight of the liquid crystal composition.

11. The liquid crystal composition according to claim 1, wherein the compound of general Formula M is selected form a group consisting of the following compounds:

12. The liquid crystal composition according to claim 11, wherein the compound of general Formula M provides 1%-80% by weight of the total weight of the liquid crystal composition.

13. A liquid crystal display device comprising the liquid crystal composition according to claim 1.