Anti-glare film with concave-convex structure
The present invention provides an anti-glare film which has not only <1> sufficient anti-reflection property but also <2> a high level of contrast and <3> strong anti-glare properties and can be applied on a surface of various display devices such as a note PC, a desktop PC and a TV monitor. The anti-glare film of the present invention includes an anti-glare layer which has concavities and convexities on the surface, a haze according to JIS-7105-1981 in the range of 1.0-5.0%, and an average interval between concavities and convexities on the anti-glare layer surface Sm according to JIS-B0601-1994 in the range of 10-150 μm.
1. An anti-glare film comprising:
a transparent substrate; and
an anti-glare layer,
said anti-glare layer being formed on said transparent substrate and having concavities and convexities on the surface, a haze of said anti-glare layer being in the range of 1.0-5.0%, and an average interval between said concavities and convexities (Sm) on said surface of said anti-glare layer being in the range of 10-150 μm, wherein
said anti-glare layer includes binder matrix and particles, a difference (|n A −n M |) between a refractive index of said particles (n A ) and a refractive index of said binder matrix (n M ) being 0.04 or less, wherein
said anti-glare layer includes said particles by a ratio in the range of 0.5-20.0 parts by weight relative to 100 parts by weight of said binder matrix, wherein
an average thickness (H) of said anti-glare layer is in the range of 3-12 μm, wherein
said binder matrix includes a material which is made from an acrylic material by curing by ionizing radiation, and wherein
said particles consist of styrene-methyl methacrylate copolymer.
2. The anti-glare film according to claim 1 , wherein
said haze of said anti-glare layer is in the range of 1.8-4.8%, and said average interval between said concavities and convexities (Sm) on said surface of said anti-glare layer is in the range of 15-142 μm, said difference (|n A −n M |) is in the range 0.01-0.04, said anti-glare layer includes said particles by a ratio in the range of 0.5-19.0 parts by weight relative to 100 parts by weight of said binder matrix, and said average thickness (H) of said anti-glare layer is in the range of 3.5-11.7 μm.
3. An LCD comprising:
the anti-glare film according to claim 2 ;
a first polarizing plate;
a liquid crystal cell;
a second polarizing plate; and
a backlight unit, wherein
said anti-glare layer is arranged on a surface of an observer's side.
4. A polarizing plate comprising:
the anti-glare film according to claim 2 ;
a polarizing layer; and
a second transparent substrate, wherein
said polarizing layer and said second transparent substrate are arranged on the other side of said an glare film from the side on which said anti-glare layer is formed.
5. An LCD comprising:
the polarizing plate according to claim 4 ;
a liquid crystal cell;
a second polarizing plate; and
a backlight unit, wherein
said anti-glare layer is arranged on a surface of an observer's side.