Liquid crystal composition and liquid crystal display comprising the same

Patent metadata

Field	Value
Publication number	US-9617475-B1
Application number	US-201615074391-A
Country	US
Kind code	B1
Filing date	Mar 18, 2016
Priority date	Oct 7, 2015
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A liquid crystal composition includes at least one first compound represented by Formula I:

wherein each of L1 to L8 are independently a hydrogen or a fluorine;

is a cyclohexyl group, a phenyl group, tetrahydropyran, 1,3-dioxane, a fluorocyclohexyl group, a fluorophenyl group, fluorotetrahydropyran, or fluoro-1,3-dioxane; n is 0 to 2, and when n=2, each

is independently a cyclohexyl group, a phenyl group, tetrahydropyran, 1,3-dioxane, a fluorocyclohexyl group, a fluorophenyl group, fluorotetrahydropyran, or fluoro-1,3-dioxane; each of R 1 and R 2 is independently a C 1˜2 alkyl group; and R′ is hydrogen, a C 1˜5 alkyl group, a C 2˜5 alkenyl group, or a C 1˜5 alkoxy group.

First claim

What is claimed is:

1. A liquid crystal composition, comprising:
at least one first compound represented by Formula I:

wherein
each of L1 to L8 is a hydrogen or a fluorine;

is a cyclohexyl group, a phenyl group, tetrahydropyran, 1,3-dioxane, a fluorocyclohexyl group, a fluorophenyl group, fluorotetrahydropyran, or fluoro-1,3-dioxane;
n is 0 to 2, and when n=2, each

is independently a cyclohexyl group, a phenyl group, tetrahydropyran, 1,3-dioxane, a fluorocyclohexyl group, a fluorophenyl group, fluorotetrahydropyran, or fluoro-1,3-dioxane;
each of R 1 and R 2 are independently a C 1˜2 alkyl group; and
R′ is hydrogen, a C 1˜5 alkyl group, a C 2˜5 alkenyl group, or a C 1˜5 alkoxy group.

2. The liquid crystal composition of claim 1 , wherein the first compound is at least one of compounds represented by Formulas I-1 to I-42:

3. The liquid crystal composition of claim 1 , further comprising at least one second compound represented by Formulas II-1 to II-8:

wherein each X and Y are independently hydrogen, a C 1˜5 alkyl group, a C 2˜5 alkenyl group, a C 1˜5 alkoxy group, a C 1˜5 fluoroalkyl group, a C 2˜5 fluoroalkenyl group, or a C 1˜5 fluoroalkoxy group.

4. The liquid crystal composition of claim 1 , further comprising at least one third compound represented by Formulas III-1 to III-12:

wherein each X and Y are independently hydrogen, a C 1˜6 alkyl group, a C 2˜6 alkenyl group, a C 1˜6 alkoxy group, a C 1˜6 fluoroalkyl group, a C 2˜6 fluoroalkenyl group, or a C 1˜6 fluoroalkoxy group.

5. A liquid crystal display (LCD), comprising:
a first display substrate comprising one or more thin-film transistor (TFT);
a second display substrate facing the first display substrate; and
a liquid crystal layer comprising at least one first compound represented by Formula I:

wherein
each of L1 to L8 is a hydrogen or a fluorine;

is a cyclohexyl group, a phenyl group, tetrahydropyran, 1,3-dioxane, a fluorocyclohexyl group, a fluorophenyl group, fluorotetrahydropyran, or fluoro-1,3-dioxane;
n is 0 to 2, and when n=2, each

is independently a cyclohexyl group, a phenyl group, tetrahydropyran, 1,3-dioxane, a fluorocyclohexyl group, a fluorophenyl group, fluorotetrahydropyran, or fluoro-1,3-dioxane;
each of R 1 and R 2 are independently a C 1˜2 alkyl group; and
R′ is hydrogen, a C 1˜5 alkyl group, a C 2˜5 alkenyl group, or a C 1˜5 alkoxy group.

6. The LCD of claim 5 , wherein the first compound is at least one of compounds represented by Formulas I-1 to I-42:

7. The LCD of claim 5 , wherein the liquid crystal layer further comprises at least one second compound represented by Formulas II-1 to II-8:

wherein each X and Y are independently hydrogen, a C 1˜5 alkyl group, a C 2˜5 alkenyl group, a C 1˜5 alkoxy group, a C 1˜5 fluoroalkyl group, a C 2˜5 fluoroalkenyl group, or a C 1˜5 fluoroalkoxy group.

8. The LCD of claim 5 , wherein the liquid crystal layer further comprises at least one third compound represented by Formulas III-1 to III-12:

wherein each X and Y are independently hydrogen, a C 1˜6 alkyl group, a C 2˜6 alkenyl group, a C 1˜6 alkoxy group, a C 1˜6 fluoroalkyl group, a C 2˜6 fluoroalkenyl group, or a C 1˜6 fluoroalkoxy group.

Assignees

• Samsung Display Co Ltd
• Samsung Display Co Ltd

Inventors

• Kwon Sun Young
• Oh Keun Chan

Classifications

• C09K2019/301

  Cy-Cy-Ph · CPC title

• C07C43/225

  containing halogen · CPC title

• C09K2019/3009

  Cy-Ph · CPC title

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• C09K2019/3004

  Cy-Cy · CPC title