ANTIGLARE FILM, METHOD FOR MANUFACTURING ANTIGLARE FILM, POLARIZER, AND DISPLAY DEVICE

• US 20090015927A1
• Filed: 07/10/2008
• Published: 01/15/2009
• Est. Priority Date: 07/11/2007
• Status: Active Grant

• Current Assignee: Saturn Licensing LLC (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Matsumura, Shinichi, Haga, Yumi, Nagahama, Tsutomu, Watanabe, Hitoshi
• Granted Patent: US 8,081,385 B2
• Time in Patent Office: Days
• US Class Current: 359/614
• CPC Class Codes: G02B 1/105 Protective coatings
• CPC Class Codes: G02B 1/14 Protective coatings, e.g. hard coatings
• CPC Class Codes: G02B 5/0226 having particles on the surface
• CPC Class Codes: G02B 5/0268 characterized by the fabrication or manufacturing method
• CPC Class Codes: G02B 5/0278 used in transmission
• CPC Class Codes: G02B 5/0294 adapted to provide an additional optical effect, e.g. anti-reflection or filter

Abstract

An antiglare film includes a base material and an antiglare layer which is disposed on at least one surface of the base material and which contains fine particles and a resin, wherein the fine particles constitute aggregates mainly in in-plane directions, and gradual unevenness is disposed on the surface of the antiglare layer through aggregation of the fine particles.

Claims

1. An antiglare film comprising:

a base material; and

an antiglare layer which is disposed on at least one surface of the base material and which contains fine particles and a resin,

wherein the fine particles constitute aggregates mainly in in-plane directions, and

gradual unevenness is disposed on the surface of the antiglare layer through aggregation of the fine particles.

2. The antiglare film according to claim 1,

wherein the haze of the film surface is 0% or more, and 5% or less, and

the haze of the entire film is 3% or more, and 40% or less.

3. The antiglare film according to claim 1, wherein the white turbidity is 2.0 or less.

4. The antiglare film according to claim 1, wherein the gradual unevenness is formed through convection generated during drying of a paint which contains a resin, fine particles, and a solvent and which is applied to the base material and aggregation of the fine particles generated during formation of Benard cells.

5. The antiglare film according to claim 4, wherein the surface tension of the solvent contained in the paint is smaller than the surface energy of the fine particles.

6. The antiglare film according to claim 1, wherein the thickness of the antiglare layer is 3 μ

m or more, and 20 μ

m or less.

7. The antiglare film according to claim 1, wherein the arithmetic average roughness Ra of the antiglare layer surface is 0.05 μ

m or more, and 0.5 μ

m or less.

8. The antiglare film according to claim 1, wherein the fine particles contained in the antiglare layer comprises at least one of organic fine particles and inorganic fine particles.

9. The antiglare film according to claim 1, wherein the content of the fine particles in the antiglare layer is 3 percent by weight or more, and 15 percent by weight or less in terms of ratio relative to the resin.

10. The antiglare film according to claim 1, wherein the average particle diameter of the fine particles is 0.01 μ

m or more, and 10 μ

m or less.

11. The antiglare film according to claim 1, wherein the fine particles are covered with the resin.

12. The antiglare film according to claim 1, further comprising a low-refractive-index layer having the refractive index lower than that of the antiglare layer on the antiglare layer.

13. A polarizer comprising the antiglare film according to any one of claims 1 to 12.

14. A display device comprising the antiglare film according to any one of claims 1 to 12 on a display surface.

15. A method for manufacturing an antiglare film comprising:

applying a paint containing a resin, fine particles, and a solvent to a base material;

drying the paint to aggregate the fine particles mainly in in-plane directions so as to form gradual unevenness on the surface of the paint; and

curing the paint provided with the gradual unevenness.

16. The method for manufacturing an antiglare film according to claim 15, wherein the gradual unevenness is formed through convection generated during drying of the paint and aggregation of the fine particles generated during formation of Benard cells in the forming gradual unevenness.

17. The method for manufacturing an antiglare film according to claim 15, wherein the surface tension of the solvent contained in the paint is smaller than the surface energy of the fine particles.