Phase difference film, method for manufacturing phase difference film, polarizing plate, and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-11726367-B2
Application number	US-202117177541-A
Country	US
Kind code	B2
Filing date	Feb 17, 2021
Priority date	Aug 30, 2018
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

An object of the present invention is to provide a phase difference film having excellent alignment without the need for alignment treatment on a support, a method for manufacturing a phase difference film, a polarizing plate, and a liquid crystal display device. The phase difference film of the present invention includes a support, and a liquid crystal layer formed of a liquid crystal composition containing a liquid crystalline compound so as to be in contact with the support, in which a surface energy of a surface of the support on which the liquid crystal layer is formed is 45 mN/m or more and a non-polar dispersion force component included in the surface energy is 45 mN/m or more, the liquid crystalline compound is immobilized in an aligned state, and a contrast is more than 10000.

First claim

What is claimed is:

1. A polarizing plate comprising:
a phase difference film; and
a polarizer,
wherein the phase difference film comprises:
a support; and
a liquid crystal layer formed of a liquid crystal composition containing a liquid crystalline compound so as to be in contact with the support,
a surface energy of a surface of the support on which the liquid crystal layer is formed is 45 mN/m or more and a non-polar dispersion force component included in the surface energy is 45 mN/m or more,
the liquid crystalline compound is immobilized in an aligned state,
a contrast of the phase difference film is more than 10000,
a slow axis of the support is parallel to an absorption axis of the polarizer,
the support has 100 to 180 nm of Re1 and 50 to 90 nm of Rth1,
the liquid crystal layer has −10 to 10 nm of Re2 and −150 to −80 nm of Rth2, and
the support and the liquid crystal layer have a reciprocal wavelength dispersibility,
where, Re1 means an in-plane retardation (nm) of the support at a wavelength of 550 nm, Rth1 means a thickness-direction retardation (nm) of the support at a wavelength of 550 nm, Re2 means an in-plane retardation (nm) of the liquid crystal layer at a wavelength of 550 nm, and Rth2 means a thickness-direction retardation (nm) of the liquid crystal layer at a wavelength of 550 nm.

2. The polarizing plate according to claim 1 ,
wherein a material constituting the support is polycarbonate.

3. The polarizing plate according to claim 1 ,
wherein the liquid crystal layer exhibits smectic properties.

4. The polarizing plate according to claim 1 ,
wherein the liquid crystal composition further contains a boronic acid monomer having a polymerizable group and a boronic acid group represented by Formula (B),

in Formula (B), R 1 and R 2 each independently represent a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, an aryl group, or a heterocyclic group, R 1 and R 2 may be linked to each other to form a ring, and * represents a bonding position.

5. The polarizing plate according to claim 1 ,
wherein the polarizer, the liquid crystal layer included in the phase difference film, and the support included in the phase difference film are arranged in this order.

6. A liquid crystal display device comprising:
the polarizing plate according to claim 1 ; and
a transverse electric field type liquid crystal cell,
wherein, from a viewing side, the polarizer included in the polarizing plate, the liquid crystal layer included in the polarizing plate, the support included in the polarizing plate, and the liquid crystal cell are arranged in this order.

7. The polarizing plate according to claim 2 ,
wherein the liquid crystal layer exhibits smectic properties.

8. The polarizing plate according to claim 2 ,
wherein the liquid crystal composition further contains a boronic acid monomer having a polymerizable group and a boronic acid group represented by Formula (B),

in Formula (B), R 1 and R 2 each independently represent a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, an aryl group, or a heterocyclic group, R 1 and R 2 may be linked to each other to form a ring, and * represents a bonding position.

9. The polarizing plate according to claim 3 ,
wherein the liquid crystal composition further contains a boronic acid monomer having a polymerizable group and a boronic acid group represented by Formula (B),

in Formula (B), R 1 and R 2 each independently represent a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, an aryl group, or a heterocyclic group, R 1 and R 2 may be linked to each other to form a ring, and * represents a bonding position.

Assignees

• Fujifilm Corp

Inventors

• Moriya Chie

Classifications

• G02F1/133742 Primary

  for homeotropic alignment · CPC title

• C09K19/404

  containing boron or phosphorus · CPC title

• G02F1/13731

  based on a field-induced phase transition (G02F1/13781 takes precedence) · CPC title

• G02F1/133531

  characterised by the arrangement of polariser or analyser axes · CPC title

• G02F1/133711

  by organic films, e.g. polymeric films · CPC title