# US 11,309,512 B2 · Organic EL display device and method for manufacturing organic EL display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,512 B2 - Document ID: US11309512B2 - Status: Granted - Kind: B2 - Application number: 16/497,811 - Filed: 2017-03-30 - Published: 2021-04-15 - Granted: 2022-04-19 - Earliest claimed: 2017-03-30 - Assignees: Sharp Kabushiki Kaisha - Applicants: Sharp Kabushiki Kaisha - Inventors: Tetsunori Tanaka - Web page: https://patentgrep.com/patent/US11309512B2 ## CPC - H10K 59/878: {comprising reflective means} - G09F 9/30: in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00) - H05B 33/02: Details - H05B 33/12: Light sources with substantially two-dimensional [2D] radiating surfaces - H05B 33/22: characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers - H05B 33/26: characterised by the composition or arrangement of the conductive material used as an electrode - H05B 33/28: of translucent electrodes - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 59/80518: {Reflective anodes, e.g. ITO combined with thick metallic layers} - H10K 59/80524: {Transparent cathodes, e.g. comprising thin metal layers} - H10K 2102/3026: {Top emission} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract An organic EL display device includes a reflective electrode and a transparent electrode disposed facing each other with an organic EL layer interposed therebetween. The reflective electrode includes a reflective film and a protection film formed on the reflective film, and the protection film includes a frame-shaped portion surrounding the periphery of the organic EL layer and an opening surrounded by the frame-shaped portion. This improves the reflectivity of the reflective electrode while protecting the reflective electrode. ## Claims ### Claim 1 An organic EL display device comprising: an organic EL layer; a reflective electrode including a first reflective film; a transparent electrode disposed opposite to the reflective electrode with the organic EL layer interposed between the reflective electrode and the transparent electrode; a first protection film disposed on the reflective electrode and arranged between the reflective electrode and the organic EL layer; an edge cover of a lattice pattern covering edges of the reflective electrode being aligned in a matrix shape; an insulating film on which the reflective electrode is layered; a first wiring line disposed on the insulating film; and a second protection film disposed on the first wiring line and formed in a layer identical to the layer of the first protection film, wherein the first protection film includes a frame-shaped portion surrounding a periphery of the organic EL layer in a frame shape, and a thin film portion surrounded by the frame-shaped portion and having a film thickness thinner than a film thickness of the frame-shaped portion, the frame-shaped portion is covered by the edge cover, a side surface of the edge cover in contact with the organic EL layer and a side surface of the frame-shaped portion in contact with the organic EL layer constitute a continuous plane, the reflective electrode includes a first conductive film disposed on an opposite side of the first reflective film to a side on which the organic EL layer is disposed, the first wiring line includes a second reflective film formed in a layer identical to the layer of the first reflective film, and a second conductive film formed in a layer identical to the layer of the first conductive film, and the second protection film has a film thickness thicker than a film thickness of the second conductive film. ### Claim 2 (depends on 1) The organic EL display device according to claim 1, further comprising: a switching element for pixel driving disposed for each pixel; and a second wiring line formed in a layer identical to the layer of the switching element; wherein the insulating film covers the switching element and the second wiring line, and an organic EL element disposed for each pixel and including the reflective electrode, the transparent electrode and films between the reflective electrode and the transparent electrode, is connected to the switching element via a contact hole formed in the insulating film. ### Claim 3 (depends on 2) The organic EL display device according to claim 2, wherein the second wiring line is formed in a lattice pattern in the periphery of the reflective electrode. ### Claim 4 (depends on 2) The organic EL display device according to claim 2, wherein: the second wiring line is electrically connected to the first wiring line. ### Claim 5 (depends on 1) The organic EL display device according to claim 1, wherein the first protection film is formed of ITO or IZO. ### Claim 6 (depends on 1) The organic EL display device according to claim 1, wherein the frame-shaped portion of the first protection film has a film thickness thicker than a film thickness of the first conductive film.