# US 2019/0319214 A1 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0319214 A1 - Document ID: US20190319214A1 - Status: Published application - Kind: A1 - Application number: 16/467,159 - Filed: 2017-06-16 - Published: 2019-10-17 - Earliest claimed: 2017-06-16 - Assignees: Sharp Kabushiki Kaisha - Applicants: Sharp Kabushiki Kaisha - Inventors: Hiroki TANIYAMA; Tohru OKABE; Ryosuke GUNJI; Shinsuke SAIDA; Akira INOUE; Yoshihiro NAKADA - Web page: https://patentgrep.com/patent/US20190319214A1 ## CPC - H10K 59/124: Insulating layers formed between TFT elements and OLED elements - 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 33/04: Sealing arrangements {, e.g. against humidity} - H05B 33/10: Apparatus or processes specially adapted to the manufacture of electroluminescent light sources - 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 - H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers} - H10K 59/1213: {the pixel elements being TFTs} - 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 A first damming wall and a second damming wall are provided in a frame region. The first damming wall surrounds a display region formed from a first organic material and overlaps with a circumferential end part of an organic layer. The second damming wall includes a top part formed from a second organic material in the periphery of the first damming wall, and overlaps with an edge of the circumferential end part of the organic layer. The second damming wall includes a bottom part located closer to a base substrate, the bottom part being formed from a material constituting parts of switching elements. ## Claims ### Claim 1 A display device comprising: a base substrate; a plurality of switching elements provided on the base substrate; a flattening film, provided on the plurality of switching elements, that flattens a surface shape formed by the plurality of switching elements; a light emitting element provided on the flattening film, the light emitting element including a partition; and a sealing film covering the light emitting element, the sealing film including a first inorganic layer, an organic layer, and a second inorganic layer layered in that order, wherein a display region in which an image is displayed, and a frame region located in the periphery of the display region, are defined in the display device, a first damming wall and a second damming wall are provided in the frame region, the first damming wall being formed from a first organic material, surrounding the display region, and overlapping with a circumferential end part of the organic layer, the second damming wall being formed in the periphery of the first damming wall from a second organic material, the second damming wall including a top part and overlapping with an edge of the circumferential end part of the organic layer, the second damming wall includes a bottom part located closer to the base substrate, the bottom part being formed from a material constituting a part of the switching elements, and the first organic material is a material constituting the flattening film. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the second damming wall includes a middle part between the top part and the bottom part, the middle part being formed from the first organic material. ### Claim 3 (depends on 1) The display device according to claim 1, wherein in the frame region, a third damming wall is provided in the periphery of the second damming wall, the third damming wall including a bottom part, a middle part, and a top part, the bottom part being formed from a material constituting a part of the switching elements, the middle part being formed from the first organic material, and the top part being formed from the second organic material. ### Claim 4 (canceled) ### Claim 5 (depends on 1) The display device according to claim 1, wherein the second organic material is a material constituting the partition. ### Claim 6 (depends on 1) The display device according to claim 1, wherein a part of each switching element is a source electrode. ### Claim 7 (depends on 1) The display device according to claim 1, wherein a part of each switching element is a gate electrode. ### Claim 8 (depends on 1) The display device according to claim 1, wherein an angle formed by a surface of the base substrate and a side surface of the top part is greater than or equal to 70 degrees. ### Claim 9 (depends on 1) The display device according to claim 1, wherein the bottom part is in contact with the sealing film on a side of the bottom part closer to the display region. ### Claim 10 (depends on 9) The display device according to claim 9, wherein the top part is in contact with the bottom part on a side of the bottom part opposite the display region. ### Claim 11 (depends on 1) The display device according to claim 1, wherein the bottom part includes a first conductive layer and a second conductive layer layered in that order, and at least a part of a perimeter edge surface of the first conductive layer is located further inward than a perimeter edge surface of the second conductive layer. ### Claim 12 (depends on 11) The display device according to claim 11, wherein the bottom part includes a third conductive layer provided closer to the base substrate than the first conductive layer, and at least a part of a perimeter edge surface of the first conductive layer is located further inward than a perimeter edge surface of the third conductive layer. ### Claim 13 (depends on 11) The display device according to claim 11, wherein the first conductive layer is composed of an aluminum film. ### Claim 14 (depends on 1) The display device according to claim 1, wherein the second inorganic layer is provided covering the organic layer. ### Claim 15 (depends on 1) The display device according to claim 1, wherein a first metal layer is provided between the base substrate and the first damming wall, the first metal layer protruding from the first damming wall. ### Claim 16 (depends on 15) The display device according to claim 15, wherein a second metal layer is provided between the base substrate and the second damming wall, the second metal layer protruding from the top part. ### Claim 17 (depends on 1) The display device according to claim 1, wherein the light emitting element is an organic EL element. ### Claim 18 (depends on 1) The display device according to claim 1, wherein the base substrate is flexible. ### Claim 19 (canceled) ### Claim 20 A display device comprising: a base substrate; a plurality of switching elements provided on the base substrate; a flattening film, provided on the plurality of switching elements, that flattens a surface shape formed by the plurality of switching elements; a light emitting element provided on the flattening film, the light emitting element including a partition; and a sealing film provided covering the light emitting element, the sealing film including a first inorganic layer, an organic layer, and a second inorganic layer layered in that order, wherein a display region in which an image is displayed, and a frame region located in the periphery of the display region, are defined in the display device, a first damming wall and a second damming wall are provided in the frame region, the first damming wall being formed from a first organic material, surrounding the display region, and overlapping with a circumferential end part of the organic layer, the second damming wall being formed in the periphery of the first damming wall from a second organic material, the second damming wall including a top part and overlapping with an edge of the circumferential end part of the organic layer, the second damming wall includes a bottom part located closer to the base substrate, the bottom part being formed from a material constituting a part of the switching elements, and a part of each of the switching elements is a gate electrode. ### Claim 21 (depends on 20) The display device according to claim 20, wherein the bottom part is in contact with the sealing film on a side of the bottom part closer to the display region. ### Claim 22 (depends on 20) The display device according to claim 20, wherein the bottom part includes a first conductive layer and a second conductive layer layered in that order, and at least a part of a perimeter edge surface of the first conductive layer is located further inward than a perimeter edge surface of the second conductive layer.