Liquid crystal display device, production method for liquid crystal display device, and retardation layer-forming monomer

Patent metadata

Field	Value
Publication number	US-11366357-B2
Application number	US-201816497948-A
Country	US
Kind code	B2
Filing date	Mar 22, 2018
Priority date	Mar 28, 2017
Publication date	Jun 21, 2022
Grant date	Jun 21, 2022

Abstract

The present invention is a liquid crystal display device including a pair of substrates, a liquid crystal layer which is sandwiched between the pair of substrates and contains a liquid crystal material, and an alignment layer which is in contact with the liquid crystal layer. In this liquid crystal display device, at least one of the pair of substrates has a retardation layer on a side toward the liquid crystal layer, the alignment layer aligns a liquid crystal compound in the liquid crystal material, the retardation layer contains a polymer formed by polymerization of at least one monomer, and the at least one monomer includes a specific monomer.

First claim

The invention claimed is:

1. A retardation layer-forming monomer represented by Chemical formula (1):

wherein P 1 represents an acryloylamino group or a methacryloylamino group, and P 2 represents an acryloyloxy group, a methacryloyloxy group, an acryloylamino group, a methacryloylamino group, a vinyl group, or a vinyloxy group; Sp 1 and Sp 2 are the same as or different from each other, and each represents a linear, branched or cyclic alkylene group containing 1 to 10 carbon atoms or a linear, branched or cyclic alkenylene group containing 1 to 10 carbon atoms, or each represents a direct bond; and L 1 and L 2 are the same as or different from each other, and each represents a —NH— group, —O— group, —S— group, or a direct bond, and
wherein in Chemical formula (1), L 1 represents a —NH— group, and L 2 represents a —NH— group, —O— group, —S— group, or a direct bond.

2. A retardation layer containing a polymer formed by polymerization of at least one monomer including a retardation layer-forming monomer represented by Chemical formula (1):

wherein P 1 represents an acryloylamino group or a methacryloylamino group, and P 2 represents an acryloyloxy group, a methacryloyloxy group, an acryloylamino group, a methacryloylamino group, a vinyl group, or a vinyloxy group; Sp 1 and Sp 2 are the same as or different from each other, and each represents a linear, branched or cyclic alkylene group containing 1 to 10 carbon atoms or a linear, branched or cyclic alkenylene group containing 1 to 10 carbon atoms, or each represents a direct bond; and L 1 and L 2 are the same as or different from each other, and each represents a —NH— group, —O— group, —S— group, or a direct bond,
when both of Sp 1 and Sp 2 represent direct bond, and both of L 1 and L 2 represent direct bond, P 2 represents an acryloyloxy group or a methacryloyloxy group,
wherein the at least one monomer further includes a second monomer different from the monomer represented by Chemical formula (1), and
wherein the second monomer is a monomer represented by any one of Chemical formulas (5), (6) and (3-15):

3. The retardation layer-forming monomer according to claim 1 ,
wherein in the Chemical formula (1), at least one of Sp 1 or Sp 2 represents a linear alkylene group containing 1 to 6 carbon atoms.

4. The retardation layer-forming monomer according to claim 1 , being a monomer represented by any one of Chemical formulas (2-3), (2-11), (2-12) and (2-16):

5. A retardation layer containing a polymer formed by polymerization of at least one monomer including the retardation layer-forming monomer according to claim 1 .

6. The retardation layer according to claim 5 ,
wherein the at least one monomer further includes a second monomer different from the monomer represented by Chemical formula (1).

7. The retardation layer according to claim 6 ,
wherein the second monomer is a monomer represented by any one of Chemical formulas (3-1) to (3-15):

wherein X 1 and X 2 are the same as or different from each other, and each represents a hydrogen atom or a methyl group; g, h and i are the same as or different from each other, and each represents an integer of 1 to 18; and j and k are the same as or different from each other, and each represents an integer of 1 to 12.

8. The retardation layer according to claim 6 ,
wherein the second monomer is a monomer represented by any one of Chemical formulas (5), (6) and (3-15):

9. The retardation layer according to claim 6 ,
wherein the retardation layer-forming monomer is represented by Chemical formula (2-16):

and
the second monomer is a monomer represented by any one of Chemical formulas (5), (6) and (3-15):

10. The retardation layer according to claim 2 , containing at least one group of at least one of a —CONH— group or an —NH— group.

11. A retardation layer containing a polymer formed by polymerization of at least one monomer including a retardation layer-forming monomer represented by Chemical formula (1):

wherein P 1 represents an acryloylamino group or a methacryloylamino group, and P 2 represents an acryloyloxy group, a methacryloyloxy group, an acryloylamino group, a methacryloylamino group, a vinyl group, or a vinyloxy group; Sp 1 and Sp 2 are the same as or different from each other, and each represents a linear, branched or cyclic alkylene group containing 1 to 10 carbon atoms or a linear, branched or cyclic alkenylene group containing 1 to 10 carbon atoms, or each represents a direct bond; and L 1 and L 2 are the same as or different from each other, and each represents a —NH— group, —O— group, —S— group, or a direct bond,
when both of Sp 1 and Sp 2 represent direct bond, and both of L 1 and L 2 represent direct bond, P 2 represents an acryloyloxy group or a methacryloyloxy group,
wherein the at least one monomer further includes a second monomer different from the monomer represented by Chemical formula (1),
wherein the retardation layer-forming monomer is represented by Chemical formula (2-16):

and
the second monomer is a monomer represented by any one of Chemical formulas (5), (6) and (3-15):

12. The retardation layer according to claim 2 ,
wherein in the Chemical formula (1), at least one of Sp 1 or Sp 2 represents a linear alkylene group containing 1 to 6 carbon atoms.

13. The retardation layer according to claim 2 ,
wherein an —NH— group or an —O— group is bonded to at least one of phenylene groups in an azobenzene group.

14. The retardation layer according to claim 2 , the retardation layer-forming monomer being a monomer represented by any one of Chemical formulas (2-3), (2-10) to (2-13) and (2-16):

15. The retardation layer according to claim 2 ,
wherein the retardation layer-forming monomer is represented by Chemical formula (2-16):

and
the second monomer is a monomer represented by any one of Chemical formulas (5), (6) and (3-15):

Assignees

• Sharp Kk

Inventors

• Mizusaki Masanobu

Classifications

• G02F1/133788

  by light irradiation, e.g. linearly polarised light photo-polymerisation · CPC title

• G02F1/133634 Primary

  the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis · CPC title

• G02B5/30

  Polarising elements (light-modulating devices with active elements G02F1/00) · CPC title

• C08F122/1006

  of polyhydric alcohols or polyhydric phenols, e.g. ethylene glycol dimethacrylate · CPC title

• G02F1/13363 Primary

  Birefringent elements, e.g. for optical compensation · CPC title