# US 2010/0167019 A1 · Optical device, method for manufacturing the same and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0167019 A1 - Document ID: US20100167019A1 - Status: Published application - Kind: A1 - Application number: 12/645,628 - Filed: 2009-12-23 - Published: 2010-07-01 - Earliest claimed: 2008-12-29 - Assignees: Sony Corporation - Inventors: Eiki Ohyanagi; Hitoshi Watanabe; Mikihisa Mizuno; Masanori Nishiyama - Web page: https://patentgrep.com/patent/US20100167019A1 ## CPC - G02B 5/02: Diffusing elements; Afocal elements - Y10T 428/24355: Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] - Y10T 428/24364: with transparent or protective coating - Y10T 428/24413: Metal or metal compound - Y10T 428/24612: Composite web or sheet - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An optical device is provided and includes a substrate having a three-dimensionally random concave-convex shape on the surface thereof, and a hard coat layer formed on the substrate, wherein a projection height with the maximum frequency on the substrate surface falls within the range of 1.5 μm or more and not more than 10 μm. Projections larger than the projection height with the maximum frequency on the substrate surface have a height falling within +3 μm from a central value of the projection height with the maximum frequency. A length RSm in a lateral direction of concaves and convexes on the substrate surface is 55 μm or more and not more than 500 μm. ## Claims ### Claim 1 An optical device comprising: a substrate having a three-dimensionally random concave-convex shape on a surface thereof; and a hard coat layer formed on the substrate, wherein a projection height with the maximum frequency on the substrate surface falls within a range of 1.5 μm or more and not more than 10 μm; projections larger than the projection height with the maximum frequency on the substrate surface have a height falling within +3 μm from a central value of the projection height with the maximum frequency; and a length RSm in a lateral direction of concaves and convexes on the substrate surface is 55 μm or more and not more than 500 μm. ### Claim 2 (depends on 1) The optical device according to claim 1, wherein the hard coat layer contains an inorganic oxide filler and a viscosity modifier; and the inorganic oxide filler and the viscosity modified are hydrogen-bonded or coordinate-bonded to each other. ### Claim 3 (depends on 2) The optical device according to claim 2, wherein the inorganic oxide filler contains, as a main component, at least one member selected from the group consisting of silica, alumina, zirconia, antimony pentoxide, zinc oxide, tin oxide, indium tin oxide, indium oxide, antimony-doped tin oxide and aluminum zinc oxide; and the viscosity modifier is a molecule containing two or more of at least one kind of substituent selected from the group consisting of a hydroxyl group, a carboxyl group, a urea group, an amide group and an amino group. ### Claim 4 (depends on 2) The optical device according to claim 2, wherein the hard coat layer contains, as a main component, at least one member selected from the group consisting of a thermosetting resin and an ultraviolet ray-curable resin. ### Claim 5 (depends on 1) The optical device according to claim 1, wherein projections larger than the projection height with the maximum frequency on the substrate surface have a height falling within +2 μm from a central value of the projection height with the maximum frequency. ### Claim 6 (depends on 1) The optical device according to claim 1, wherein a continuous wave front is formed on the hard coat layer surface, following the concave-convex shape on the substrate surface. ### Claim 7 (depends on 1) The optical device according to claim 1, wherein the random concave-convex shape is formed by shape transfer of a master disc prepared by blasting. ### Claim 8 (depends on 1) The optical device according to claim 1, further comprising an anti-reflection layer formed on the hard coat layer. ### Claim 9 An optical device comprising: a substrate having a three-dimensionally random concave-convex shape on a surface thereof; and a hard coat layer formed on the substrate, wherein a projection height with the maximum frequency on the hard coat layer surface falls within a range of 0.1 μm or more and not more than 5 μm; projections larger than the projection height with the maximum frequency on the hard coat layer surface have a height falling within +1 μm from a central value of the projection height with the maximum frequency; and a length RSm in a lateral direction of concaves and convexes on the hard coat layer surface is 55 μm or more and not more than 500 μm. ### Claim 10 A display device comprising an optical device the optical device including: a substrate having a three-dimensionally random concave-convex shape on a surface thereof; and a hard coat layer formed on the substrate, wherein a projection height with the maximum frequency on the hard coat layer surface falls within a range of 0.1 μm or more and not more than 5 μm; projections larger than the projection height with the maximum frequency on the hard coat layer surface have a height falling within +1 μm from a central value of the projection height with the maximum frequency; and a length RSm in a lateral direction of concaves and convexes on the hard coat layer surface is 55 μm or more and not more than 500 μm. ### Claim 11 A method for manufacturing an optical device, the method comprising: preparing a master disc having a three-dimensionally random concave-convex shape on the surface thereof by blasting; transferring the concave-convex shape of the master disc onto a substrate; and forming a hard coat layer on the substrate by coating a hard coat coating material on a surface of the substrate on which the concave-convex shape is formed and curing the hard coat coating material, wherein a projection height with the maximum frequency on the substrate surface falls within a range of 1.5 μm or more and not more than 10 μm; projections larger than the projection height with the maximum frequency on the substrate surface have a height falling within +3 μm from a central value of the projection height with the maximum frequency; and a length RSm in a lateral direction of concaves and convexes on the substrate surface is 55 μm or more and not more than 500 μm. ### Claim 12 (depends on 11) The method for manufacturing an optical device according to claim 11, wherein the hard coat coating material contains an ionizing radiation-curable resin or a thermosetting resin, an inorganic oxide filler and a viscosity modifier; and in the formation step of the hard coat layer, the inorganic oxide filler and the viscosity modifier are hydrogen-bonded or coordinate-bonded to each other.