Alignment film, method of manufacturing the alignment film, retardation film, method of manufacturing the retardation film, and display

Patent metadata

Field	Value
Publication number	US-9921347-B2
Application number	US-201113818536-A
Country	US
Kind code	B2
Filing date	Aug 17, 2011
Priority date	Aug 27, 2010
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

An alignment film capable of reducing occurrence of alignment disorder in a simple manner, a method of manufacturing the alignment film, a retardation film, a method of manufacturing the retardation film, and a display are provided. An alignment film is configured of an anchor layer and an alignment layer stacked in this order on a base. The alignment layer includes a groove region having a plurality of fine grooves on a surface thereof, and a groove region having a plurality of fine grooves on a surface thereof. The anchor layer provided between the base and the alignment layer is provided with an antistatic function in addition to a function of bringing the alignment layer into close contact with the base.

First claim

The invention claimed is:

1. An alignment film, comprising
an anchor layer and an alignment layer stacked in this order on a base,
wherein the alignment layer has a plurality of fine grooves of nanometer order scale on a surface thereof, the plurality of fine grooves extending in a particular direction,
wherein the anchor layer is in contact with the base and with the alignment layer, and has a surface resistance of 10 11 ohms per square centimeter or more and 10 12 ohms per square centimeter or less,
wherein the anchor layer includes an anchor material including an acrylate monomer with three or more functional groups,
wherein the anchor material includes 50 parts by weight or more and 90 parts by weight or less of the acrylate monomer, a conductive material, and a solvent into which the conductive material is dispersed, and
wherein the anchor layer has a thickness ranging from 0.5 μm to 3.5 μm.

2. The alignment film according to claim 1 ,
wherein the base is a thermoplastic norbornene-based resin film.

3. The alignment film according to claim 2 , wherein the conductive material is one of a conductive polymer and an ionic liquid.

4. The alignment film according to claim 2 , wherein the solvent contains butyl acetate and isopropyl alcohol.

5. The alignment film according to claim 2 , wherein the anchor layer is formed by applying a material, as the anchor material, containing the acrylate monomer, an ester-based resin, a urethane-based resin, the conductive material, and the solvent onto the base, and then drying and curing the applied material.

6. An alignment film, comprising
an alignment layer on a main surface of a base, the base including an antistatic layer laminated on a back thereof,
wherein the alignment layer includes a plurality of fine grooves of nanometer order scale on a surface thereof, the plurality of fine grooves extending in a particular direction,
wherein the antistatic layer has a surface resistance of 10 11 ohms per square centimeter or more and 10 12 ohms per square centimeter or less,
wherein the antistatic layer includes an acrylate monomer with three or more functional groups,
wherein the antistatic layer includes 50 parts by weight or more and 90 parts by weight or less of the acrylate monomer, a conductive material, and a solvent into which the conductive material is dispersed, and
wherein the antistatic layer has a thickness ranging from 0.5 μm to 3.5 μm.

7. A retardation film, comprising
an anchor layer, an alignment layer, and a retardation layer stacked in this order on a base,
wherein the alignment layer has a plurality of fine grooves of nanometer order scale on a surface thereof, the plurality of fine grooves extending in a particular direction,
wherein the anchor layer is in contact with the base and with the alignment layer, and has a surface resistance of 10 11 ohms per square centimeter or more and 10 12 ohms per square centimeter or less,
wherein the anchor layer includes an anchor material including an acrylate monomer with three or more functional groups,
wherein the anchor material includes 50 parts by weight or more and 90 parts by weight or less of the acrylate monomer, a conductive material, and a solvent into which the conductive material is dispersed, and
wherein the anchor layer has a thickness ranging from 0.5 μm to 3.5 μm.

8. A retardation film, comprising
an alignment layer and a retardation layer stacked in this order on a main surface of a base, the base including an antistatic layer laminated on a back thereof,
wherein the alignment layer includes a plurality of fine grooves of nanometer order scale on a surface thereof, the plurality of fine grooves extending in a particular direction,
wherein the antistatic layer has a surface resistance of 10 11 ohms per square centimeter or more and 10 12 ohms per square centimeter or less,
wherein the antistatic layer includes an acrylate monomer with three or more functional groups,
wherein the antistatic layer includes 50 parts by weight or more and 90 parts by weight or less of the acrylate monomer, a conductive material, and a solvent into which the conductive material is dispersed, and
wherein the antistatic layer has a thickness ranging from 0.5 μm to 3.5 μm.

9. A display, comprising:
a light source;
a display cell performing display based on light from the light source;
a first polarizer provided on a light source side of the display cell;
a second polarizer provided on a display side of the display cell; and
a retardation film disposed on a light emission side of each of one or both of the first polarizer and the second polarizer,
wherein the retardation film includes an alignment layer on a main surface of a base, the base including an antistatic layer laminated on a back thereof,
wherein the alignment layer has a plurality of fine grooves of nanometer order scale on a surface thereof, the plurality of fine grooves extending in a particular direction,
wherein the antistatic layer has a surface resistance of 10 11 ohms per square centimeter or more and 10 12 ohms per square centimeter or less,
wherein the antistatic layer includes an acrylate monomer with three or more functional group,
wherein the antistatic layer includes 50 parts by weight or more and 90 parts by weight or less of the acrylate monomer, a conductive material, and a solvent into which the conductive material is dispersed, and
wherein the antistatic layer has a thickness ranging from 0.5 μm to 3.5 μm.

10. A display, comprising:
a light source;
a display cell performing display based on light from the light source;
a first polarizer provided on a light source side of the display cell;
a second polarizer provided on a display side of the display cell; and
a retardation film disposed on a light emission side of each of one or both of the first polarizer and the second polarizer, wherein
the retardation film includes an alignment layer and a retardation layer stacked in this order on a main surface of a base, the base including an antistatic layer laminated on a back thereof,
wherein the alignment layer includes a plurality of fine grooves of nanometer order scale on a surface thereof, the plurality of fine grooves extending in a particular direction,
wherein the antistatic layer has a surface resistance of 10 11 ohms per square centimeter or more and 10 12 ohms per square centimeter or less,
wherein the antistatic layer includes an acrylate monomer with three or more functional groups,
wherein the antistatic layer includes 50 parts by weight or more and 90 parts by weight or less of the acrylate monomer, a conductive material, and a solvent into which the conductive material is dispersed, and
wherein the antistatic layer has a thickness ranging from 0.5 μm to 3.5 μm.

Assignees

• Kuriyama Akito
• Ohyanagi Eiki
• Inoue Junichi
• Obata Kei
• Saturn Licensing Llc

Inventors

• Kuriyama Akito
• Ohyanagi Eiki
• Inoue Junichi
• Obata Kei

Classifications

• G02B1/14

  Protective coatings, e.g. hard coatings · CPC title

• G02B1/16

  having an anti-static effect, e.g. electrically conducting coatings · CPC title

• G02B5/30 Primary

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

• G02B30/00 Primary

  Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images (in microscopes G02B21/22) · CPC title

• B05D3/12

  by mechanical means · CPC title