Optical film, image display panel, and image display device
AssigneeDai Nippon Printing Co., Ltd.
InventorsJun Tsujimoto, Gen Furui, Yukimitsu Iwata, Shigeki Murakami, Takumi Yoneyama, Mitsuhiro Kuzuhara
Life of this patent
Estimating the term…
Abstract
Provided is an optical film which has high anti-glare properties, enables a suppress of a reduction in jet-black appearance by reflected scattered light, and has favorable scratch resistance. An optical film having a surface with depressions and projections, wherein the surface with depressions and projections has a reduced peak height Spk of 0.20 μm or more and 1.00 μm or less specified in ISO 25178-2:2012, and a minimum autocorrelation length Sal of 4.0 μm or more and 12.0 μm or less specified in ISO 25178.
Claims18
An optical film having a surface with depressions and projections,
- wherein the surface with depressions and projections is provided as a topmost surface of the optical film,
- wherein the surface with depressions and projections has a reduced peak height Spk of 0.20 μm or more and 1.00 μm or less specified in ISO 25178-2:2012, and a minimum autocorrelation length Sal of 4.0 μm or more and 12.0 μm or less specified in ISO 25178-2:2012,
- wherein the optical film comprises a functional layer on a substrate, the functional layer comprising an anti-glare layer, and a surface of the anti-glare layer is the surface with depressions and projections, and
- wherein the anti-glare layer comprises a binder resin and particles.
An optical film having a surface with depressions and projections,
- wherein the surface with depressions and projections is provided as a topmost surface of the optical film,
- wherein the surface with depressions and projections has a reduced peak height Spk of 0.20 μm or more and 1.00 μm or less specified in ISO 25178-2:2012, and a minimum autocorrelation length Sal of 4.0 μm or more and 12.0 μm or less specified in ISO 25178-2:2012,
- wherein the optical film comprises a functional layer on a substrate, the functional layer comprising an anti-glare layer and an anti-reflection layer, the anti-reflection layer comprises a low-refractive index layer and the surface of the low-refractive index layer is the surface with depressions and projections, and
- wherein the low-refractive index layer comprises a binder resin and low-refractive index particles.
An optical film having a surface with depressions and projections,
- wherein the surface with depressions and projections is provided as a topmost surface of the optical film,
- wherein the surface with depressions and projections has a reduced peak height Spk of 0.20 μm or more and 1.00 μm or less specified in ISO 25178-2:2012, and a minimum autocorrelation length Sal of 4.0 μm or more and 12.0 μm or less specified in ISO 25178-2:2012,
- wherein the optical film has a haze specified in JIS K7136:
- 2000 of 20% or more and 75% or less,
- wherein a layer forming the topmost surface of the optical film is an anti-glare layer that comprises a binder resin and particles, or a low-refractive index layer that comprises a binder resin and low-refractive index particles.
Dependencies are inferred from the claim text.