# US 12,001,623 B2 · Decorative sheet and electrostatic input device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,001,623 B2 - Document ID: US12001623B2 - Status: Granted - Kind: B2 - Application number: 17/645,810 - Filed: 2021-12-23 - Published: 2022-04-14 - Granted: 2024-06-04 - Earliest claimed: 2019-07-01 - Assignees: Alps Alpine Co., Ltd. - Applicants: Alps Alpine Co., Ltd. - Inventors: Kenta Suzuki; Masahito Watanabe; Hiroshi Kobayashi - Web page: https://patentgrep.com/patent/US12001623B2 ## CPC - G06F 3/0412: {Digitisers structurally integrated in a display} - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 27/08: of synthetic resin - B32B 33/00: Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class - B32B 38/18: Handling of layers or the laminate - B44C 3/025: {Superimposing layers to produce ornamental relief structures} - B44F 1/06: produced by transmitted light, e.g. transparencies, imitations of glass paintings - B44F 9/02: wood grain effects - G09F 13/04: Signs, boards or panels, illuminated from behind the insignia - B32B 2307/4023: on the layer surface, e.g. ink - B32B 2307/412: Transparent - B32B 2451/00: Decorative or ornamental articles - B44C 1/105: {comprising an adhesive layer (decalcomania B44C1/16; adhesive tapes C09J7/20)} - G06F 3/016: {Input arrangements with force or tactile feedback as computer generated output to the user} - G06F 3/044: by capacitive means - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B44C: PRODUCING DECORATIVE EFFECTS (processes for applying liquids or other fluent materials to surfaces, in general B05D; shaping of plastics or substances in a plastic state B29C; printing processes to produce transfer pictures B41M3/12; thermographic duplication or marking methods B41M5/00); MOSAICS; TARSIA WORK (imitation of mosaic or tarsia work patterns B44F11/04); PAPERHANGING {(labels G09F; multi-step processes for making paper labels or tags B31D1/02)} - B44F: SPECIAL DESIGNS OR PICTURES - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS ## Abstract A decorative sheet is a decorative sheet to be attached to a surface of a decoration target part, and includes a base film layer formed of a base film having a sheet shape, a decorative layer representing a decorative pattern, a light shield layer that is provided on a back side position with respect to the decorative layer and that includes a light transmitting portion having a predetermined shape, and a medium color layer formed between the decorative layer and the light shield layer. ## Claims ### Claim 1 A decorative sheet to be attached to a surface of a decoration target part, the decorative sheet comprising: a base film layer formed of a base film having a sheet shape; a decorative layer representing a decorative pattern; a light shield layer provided on a back side position with respect to the decorative layer, the light shield layer including a light transmitting portion having a predetermined shape; a light diffusion layer that diffuses light, the light diffusion layer formed by printing a white ink on a surface of the decorative laver; and a medium color layer formed between the decorative layer and the light shield layer, wherein the medium color layer is formed by using an ink having a gray-based color, and the light diffusion layer is formed between the decorative layer and the medium color layer. ### Claim 2 (depends on 1) The decorative sheet as claimed in claim 1, further comprising a tactile layer formed to have protrusions and recesses by printing an ink multiple times on a front side of the decorative sheet. ### Claim 3 (depends on 2) The decorative sheet as claimed in claim 2, wherein the tactile layer is formed by using a transparent color ink. ### Claim 4 (depends on 2) The decorative sheet as claimed in claim 2, wherein the decorative layer is formed on a back surface of the base film layer and the tactile layer is formed on a front surface of the base film layer. ### Claim 5 (depends on 1) The decorative sheet as claimed in claim 1, wherein each of the decorative layer, the medium color layer, and the light shield layer is formed by using a non-conductive ink. ### Claim 6 (depends on 1) The decorative sheet as claimed in claim 1, wherein the light diffusion layer is formed uniformly by printing the white ink on the surface of the decorative layer. ### Claim 7 (depends on 1) An electrostatic input device comprising: the decorative sheet as claimed in claim 1; and an electrostatic sensor disposed on a back side of the decorative sheet. ### Claim 8 (depends on 7) The electrostatic input device as claimed in claim 7, further comprising a light source disposed on the back side of the decorative sheet, the light source being configured to emit light to the decorative sheet. ### Claim 9 A decorative sheet to be attached to a surface of a decoration target part, the decorative sheet comprising: a base film 1a Ter formed of a base film having a sheet shape; a decorative layer representing a decorative pattern; a light shield layer provided on a back side position with respect to the decorative layer, the light shield layer including a light transmitting portion having a predetermined shape; a light diffusion layer that diffuses light, the light diffusion layer formed by printing a white ink on a surface of the decorative layer; and a medium color layer formed between the decorative layer and the light shield layer, wherein the medium color layer is formed by using a metallic ink, and the light diffusion layer is formed between the decorative layer and the medium color layer. ### Claim 10 (depends on 9) The decorative sheet as claimed in claim 9, wherein the medium color layer is formed by using an In metallic ink or an Sn metallic ink.