Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-2016369168-A1
Application number	US-201515122175-A
Country	US
Kind code	A1
Filing date	Feb 12, 2015
Priority date	Mar 28, 2014
Publication date	Dec 22, 2016
Grant date	—

Abstract

The subject is to show liquid crystal display device that has characteristics such as a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, a long service life and a small flicker rate. The disclosure relates to a liquid crystal display device including an electrode group formed on one or both of a pair of substrates that are opposed to each other, and a plurality of active devices connected to the electrode group, and a liquid crystal alignment film formed on the opposing surfaces of the pair of substrates, and a liquid crystal composition sandwiched in between the pair of substrates.

First claim

1 . A liquid crystal display device comprising an electrode group formed on one or both of a pair of substrates that are opposed to each other, and a plurality of active devices connected to the electrode group, and a liquid crystal alignment film formed on the opposing surfaces of the pair of substrates, and a liquid crystal composition sandwiched in between the pair of substrates.

2 . The liquid crystal display device according to claim 1 , wherein the liquid crystal composition comprises at least one compound selected from the group of compounds represented by formula (1) as a first component:

in formula (1), R 1 and R 2 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons or alkyl having 1 to 12 carbons in which at least one hydrogen has been replaced by halogen; ring A and ring C are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 1,4-phenylene in which at least one hydrogen has been replaced by fluorine or chlorine, or tetrahydropyran-2,5-diyl; ring B is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2,3-difluoro-5-methyl-1,4-phenylene, 3,4,5-trifluoronaphthalene-2,6-diyl or 7,8-difluorochroman-2,6-diyl; Z 1 and Z 2 are independently a single bond, ethylene, carbonyloxy or methyleneoxy; a is 0, 1, 2 or 3; b is 0 or 1; and the sum of a and b is 3 or less.

3 . The liquid crystal display device according to claim 2 , wherein the first component is at least one compound selected from the group of compounds represented by formula (1-1) to formula (1-20):

in formula (1-1) to formula (1-20), R 1 and R 2 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons or alkyl having 1 to 12 carbons in which at least one hydrogen has been replaced by halogen.

4 . The liquid crystal display device according to claim 2 , wherein the proportion of the first component is in the range of 10% by weight to 90% by weight based on the weight of the liquid crystal composition.

5 . The liquid crystal display device according to claim 1 , wherein the liquid crystal composition comprises at least one compound selected from the group of compounds represented by formula (2) as a second component:

in formula (2), R 3 and R 4 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkyl having 1 to 12 carbons in which at least one hydrogen has been replaced by halogen, or alkenyl having 2 to 12 carbons in which at least one hydrogen has been replaced by halogen; ring D and ring E are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene or 2,5-difluoro-1,4-phenylene; Z 3 is a single bond, ethylene or carbonyloxy; and c is 1, 2 or 3.

6 . The liquid crystal display device according to claim 5 , wherein the second component is at least one compound selected from the group of compounds represented by formula (2-1) to formula (2-13):

in formula (2-1) to formula (2-13), R 3 and R 4 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkyl having 1 to 12 carbons in which at least one hydrogen has been replaced by halogen, or alkenyl having 2 to 12 carbons in which at least one hydrogen has been replaced by halogen.

7 . The liquid crystal display device according to claim 5 , wherein the proportion of the second component is in the range of 10% by weight to 90% by weight based on the weight of the liquid crystal composition.

8 . The liquid crystal display device according to claim 1 , wherein the liquid crystal composition comprises at least one polymerizable compound selected from the group of compounds represented by formula (3) as an additive component:

in formula (3), ring F and ring I are independently cyclohexyl, cyclohexenyl, phenyl, 1-naphthyl, 2-naphthyl, tetrahydropyran-2-yl, 1,3-dioxane-2-yl, pyrimidine-2-yl or pyridine-2-yl, and in these rings at least one hydrogen may be replaced by halogen, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkyl having 1 to 12 carbons in which at least one hydrogen has been replaced by halogen; ring G is 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-1,2-diyl, naphthalene-1,3-diyl, naphthalene-1,4-diyl, naphthalene-1,5-diyl, naphthalene-1,6-diyl, naphthalene-1,7-diyl, naphthalene-1,8-diyl, naphthalene-2,3-diyl, naphthalene-2,6-diyl, naphthalene-2,7-diyl, tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl or pyridine-2,5-diyl, and in these rings at least one hydrogen may be replaced by halogen, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkyl having 1 to 12 carbons in which at least one hydrogen has been replaced by halogen; Z 4 and Z 5 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene at least one —CH 2 — may be replaced by —O—, —CO—, —COO— or —OCO—, and at least one —CH 2 —CH 2 — may be replaced by —CH═CH—, —C(CH 3 )═CH—, —CH═C(CH 3 )— or —C(CH 3 )═C(CH 3 )—, and in these groups at least one hydrogen may be replaced by fluorine or chlorine; P 1 , P 2 and P 3 are independently a polymerizable group; Sp′, Sp 2 and Sp 3 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene at least one —CH 2 — may be replaced by —O—, —COO—, —OCO— or —OCOO—, and at least one —CH 2 —CH 2 — may be replaced by —CH═CH— or —C≡C—, and in these groups at least one hydrogen may be replaced by fluorine or chlorine; d is 0, 1 or 2; e, f and g are independently 0, 1, 2, 3 or 4; and the sum of e, f and g is 1 or more.

9 . (canceled)

10 . The liquid crystal display device according to claim 8 , wherein the additive component is at least one polymerizable compound selected from the group of compounds represented by formula (3-1) to formula (3-27):

in formula (3-1) to formula (3-27), P 4 , P 5 and P 6 are independently a polymerizable group selected from the group of groups represented by formula (P-1) to formula (P-3):

in formula (P-1) to formula (P-3), M′, M 2 and M 3 are independently hydrogen, fluorine, alkyl having 1 to 5 carbons or alkyl having 1 to 5 carbons in which at least one hydrogen has been replaced by halogen; and in formula (3-1) to formula (3-27), Sp 1 , Sp 2 and Sp 3 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene at least one —CH 2 — may be replaced by —O—, —COO—, —OCO— or —OCOO—, and at least one —CH 2 —CH 2 — may be replaced by —CH═CH— or —C≡C—, and in these groups at least one hydrogen

Assignees

• Jnc Corp
• Jnc Petrochemical Corp

Inventors

• Furusato Yoshimasa
• Saito Masayuki

Classifications

• C09K19/3098

  Unsaturated non-aromatic rings, e.g. cyclohexene rings · CPC title

• C08G73/1078

  wholly aromatic in the diamino moiety · CPC title

• C09K19/3066 Primary

  in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers · CPC title

• C08G73/1085

  Polyimides with diamino moieties or tetracarboxylic segments containing heterocyclic moieties · CPC title

• C09K2019/301

  Cy-Cy-Ph · CPC title