US 2014/0111754 A1 · LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR MANUFACTURING LIQUID CRYSTAL DISPLAY DEVICE

Abstract

The present invention provides a liquid crystal display device capable of reducing image sticking phenomena and of maintaining the voltage holding ratio, the liquid crystal display device being produced using photo-alignment technology and PSA technology in combination. The liquid crystal display device according to the present invention includes a pair of substrates, a liquid crystal layer disposed between the pair of substrates, an alignment film formed on at least one of the pair of substrates, and a polymer layer for controlling the alignment of liquid crystal molecules formed on the alignment film, wherein the polymer layer is formed by polymerization of one or more species of monomers added in the liquid crystal layer, the polymerization being initiated by radicals generated of the one or more species of monomers upon absorption of light, and the alignment film includes a polymer material having a main chain that contains an imide structure and a side chain that contains a photoreactive functional group, and has undergone a photo-alignment treatment.

Claims15

Dependent claims

A liquid crystal display device comprising

a pair of substrates,
a liquid crystal layer disposed between the pair of substrates,
an alignment film formed on at least one of the pair of substrates, and
a polymer layer for controlling the alignment of liquid crystal molecules formed on the alignment film,
wherein the polymer layer is formed by polymerization of one or more species of monomers added in the liquid crystal layer,
the alignment film is formed by subjecting a polymer material to a photo-alignment treatment, the polymer material containing a compound including a main chain that contains an imide structure and a side chain that contains a photoreactive functional group, and
the one or more species of monomers are condensed aromatic compounds represented by the following chemical formula (1):
[Chem. 1]
P1-A1-P1 (1)
wherein P1s are each independently an acrylate group or a methacrylate group;
and
A1 is one of groups represented by the following chemical formulae (2-1) to (2-4):
wherein a hydrogen atom in A1 may be substituted with a halogen group, a methyl group, an ethyl group, or a propyl group.

10 more elements

A method for producing a liquid crystal display device comprising the steps of:

injecting a liquid crystal composition containing a liquid crystal material and one or more species of monomers between a pair of substrates;
forming an alignment film by applying an alignment film material to at least one of the pair of substrates and subjecting the alignment film material to a photo-alignment treatment;
forming a polymer layer for controlling the alignment of liquid crystal molecules on the alignment film by exposing the liquid crystal composition to light to allow at least one of the one or more species of monomers to initiate polymerization, and
the one or more species of monomers are condensed aromatic compounds represented by the following chemical formula (1):
[Chem. 3]
P1-A1-P1 (1)
wherein P1s are each independently an acrylate group ora methacrylate group;
and
A1 is one of groups represented by the following chemical formulae (2-1) to (2-4):
wherein a hydrogen atom in A1 may be substituted with a halogen group, a methyl group, an ethyl group, or a propyl group.

7 more elements

Dependencies are inferred from the claim text.

Liquid crystal display device and method for manufacturing liquid crystal display device

Life of this patent

Liquid crystal display device and method for manufacturing liquid crystal display device

Life of this patent

Abstract

Claims15