Anti-glare film, method for producing anti-glare film, polarizer and image display device

Patent metadata

Field	Value
Publication number	US-9529121-B2
Application number	US-201113877829-A
Country	US
Kind code	B2
Filing date	Sep 30, 2011
Priority date	Oct 4, 2010
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

The present invention provides an antiglare film having an excellent antiglare property and being capable of suitably preventing an occurrence of scintillation and a decrease in contrast. The film includes a light-transmitting substrate and a diffusion layer. The diffusion layer has a surface roughness and is formed on at least one side of the light-transmitting substrate, wherein the diffusion layer contains organic fine particles (A), organic fine particles (B), and a cured product of a binder component, and satisfies the expressions: (1) r A >r B ; (2) Δ A <Δ B ; and (3) r B /r A >C B /C A , where C A and C B represent a content ratio of the organic fine particles (A) or the organic fine particles (B) in the diffusion layer, respectively, r A and r B represent an average particle size thereof, respectively, and Δ A and Δ B represent a refractive index thereof relative to the cured product of the binder component, respectively.

First claim

The invention claimed is:

1. An antiglare film comprising: a light-transmitting substrate; and a diffusion layer having a surface roughness on a surface thereof and being formed on at least one side of the light-transmitting substrate, wherein the diffusion layer comprises organic fine particles (A), organic fine particles (B), and a cured product of a binder component, and following expressions (1), (2), and (3) are satisfied:
r A >r B   expression (1)

Δ A <Δ B   expression (2), and

r B /r A >C B /C A   expression (3),

where C A represents a content ratio of the organic fine particles (A) in the diffusion layer, r A represents an average particle size thereof, and Δ A represents a refractive index difference thereof relative to the cured product of the binder component, and C B represents a content ratio of the organic fine particles (B), r B in the diffusion layer, r B represents an average particle size thereof, and Δ B represents a refractive index difference thereof relative to the cured product of the binder component, wherein at least one set of particles selected from the group consisting of the organic fine particles (A) and the organic fine particles (B) comprise an impregnation layer formed by impregnating organic fine particles forming the respective at least one set of the particles with the binder component, and wherein the binder component comprises a (meth)acrylate monomer and a polymethyl methacrylate.

2. A method for producing an antiglare film comprising a light-transmitting substrate and a diffusion layer, the diffusion layer having a surface roughness on a surface thereof and being formed on at least one side of the light-transmitting substrate, the method comprising steps of: applying a coating solution containing organic fine particles (A), organic fine particles (B), and a binder component on at least one side of the light-transmitting substrate; drying the coating solution so as to form a coating film; and curing the coating film so as to form the diffusion layer, wherein following expressions from (1) to (3) are satisfied:
r A >r B   expression (1)

Δ A <Δ B   expression (2), and

r B /r A >C B /C A   expression (3),

where C A represents a content ratio of the organic fine particles (A), r A represents an average particle size thereof, and Δ A represents a refractive index difference thereof relative to the cured product of the binder component, and C B represents a content ratio of the organic fine particles (B), r B represents an average particle size thereof, and Δ B represents a refractive index difference thereof relative to the cured product of the binder component, wherein at least one set of particles selected from the group consisting of the organic fine particles (A) and the organic fine particles (B) comprise an impregnation layer formed by impregnating organic fine particles forming the respective at least one set of the particles with the binder component, and wherein the binder component comprises a (meth)acrylate monomer and a polymethyl methacrylate.

3. A polarizer comprising a polarizing element,
wherein the polarizer comprises the antiglare film according to claim 1 , on a surface of the polarizing element.

4. An image display device comprising
the antiglare film according to claim 1 , or
a polarizer comprising a polarizing element,
wherein the polarizer comprises on an outermost surface thereof, the antiglare film according to claim 1 , on a surface of the polarizing element.

Assignees

• Furui Gen
• Kodama Takashi
• Honda Makoto
• Dainippon Printing Co Ltd

Inventors

• Furui Gen
• Kodama Takashi
• Honda Makoto

Classifications

• G02B5/30 Primary

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

• G02B1/111 Primary

  using layers comprising organic materials · CPC title

• G02B5/0242

  by means of dispersed particles · CPC title

• G02B5/3025

  Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state (G02B5/3008, G02B5/3016 take precedence) · CPC title

• G02F1/133528

  Polarisers · CPC title