# US 2021/0082995 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 2021/0082995 A1 - Document ID: US20210082995A1 - Status: Published application - Kind: A1 - Application number: 17/103,979 - Filed: 2020-11-25 - Published: 2021-03-18 - Earliest claimed: 2018-05-31 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Masanobu IKEDA; Yasuhiro KANAYA; Tadafumi OZAKI - Web page: https://patentgrep.com/patent/US20210082995A1 ## CPC - H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout} - H10W 90/00: Package configurations - H10H 20/8316: {Multi-layer electrodes comprising at least one discontinuous layer} - H10H 20/841: Reflective coatings, e.g. dielectric Bragg reflectors - H10H 20/855: Optical field-shaping means, e.g. lenses - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10H 20/8314: {extending at least partially onto an outer side surface of the bodies} - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A display device includes a substrate, a plurality of pixels, a plurality of inorganic light-emitting elements, and a first light-shielding portion. The pixels are arrayed on the substrate. The inorganic light-emitting elements are provided corresponding to the respective pixels and each have a first side surface and a second side surface opposite to the first side surface. The first light-shielding portion is electrically coupled to the cathode of the corresponding inorganic light-emitting element and prevents output of light traveling in a direction intersecting the first side surface of the inorganic light-emitting element. ## Claims ### Claim 1 A display device comprising: a substrate; a plurality of pixels arrayed on the substrate; a plurality of inorganic light-emitting elements provided corresponding to the respective pixels and each having a first side surface and a second side surface opposite to the first side surface; and a first light-shielding portion electrically coupled to a cathode of the corresponding inorganic light-emitting element and that prevents output of light traveling in a direction intersecting the first side surface of the inorganic light-emitting element. ### Claim 2 (depends on 1) The display device according to claim 1, further comprising a second light-shielding portion that prevents output of light traveling in a direction intersecting the second side surface of the inorganic light-emitting element. ### Claim 3 (depends on 2) The display device according to claim 2, wherein the inorganic light-emitting elements configured to output light in different colors are arrayed side by side in a first direction, and the inorganic light-emitting elements configured to output light in a same color are arrayed side by side in a second direction intersecting the first direction, the first side surface and the second side surface of each of the inorganic light-emitting elements are provided intersecting the first direction, the first light-shielding portion faces the first side surface, and the second light-shielding portion faces the second side surface, and a third side surface and a fourth side surface between the first side surface and the second side surface are exposed between the first light-shielding portion and the second light-shielding portion. ### Claim 4 (depends on 2) The display device according to claim 2, wherein the inorganic light-emitting elements configured to output light in different colors are arrayed side by side in a first direction, and the inorganic light-emitting elements configured to output light in different colors are arrayed side by side in a second direction intersecting the first direction, the first light-shielding portion faces the first side surface, and the second light-shielding portion faces the second side surface, the inorganic light-emitting element has a third side surface and a fourth side surface between the first side surface and the second side surface, and the display device comprises a third light-shielding portion facing the third side surface and a fourth light-shielding portion facing the fourth side surface. ### Claim 5 (depends on 4) The display device according to claim 4, wherein a width of the third light-shielding portion and the fourth light-shielding portion in the first direction is larger than a width of the inorganic light-emitting element in the first direction. ### Claim 6 (depends on 2) The display device according to claim 2, further comprising: a flattening layer covering at least a side surface of the inorganic light-emitting element; and a first electrode provided to a surface of the flattening layer and electrically coupled to the cathode of the inorganic light-emitting element, wherein the first light-shielding portion and the second light-shielding portion are provided to the first electrode at positions overlapping the first side surface and the second side surface, respectively, when viewed from a direction perpendicular to the substrate. ### Claim 7 (depends on 1) The display device according to claim 1, further comprising: a flattening layer covering at least a side surface of the inorganic light-emitting element; and a first electrode provided to a surface of the flattening layer and electrically coupled to the cathode of the inorganic light-emitting element, wherein the first light-shielding portion is provided in a groove extending in a thickness direction from a surface of the flattening layer. ### Claim 8 (depends on 3) The display device according to claim 3, wherein a width of the first light-shielding portion in the second direction is larger than a width of the inorganic light-emitting element in the second direction. ### Claim 9 (depends on 1) The display device according to claim 1, wherein the inorganic light-emitting elements include a first inorganic light-emitting element, a second inorganic light-emitting element, and a third inorganic light-emitting element configured to output light in different colors. ### Claim 10 (depends on 9) The display device according to claim 9, further comprising: a flattening layer covering at least a side surface of the first inorganic light-emitting element, the second inorganic light-emitting element, and the third inorganic light-emitting element, wherein the substrate is provided with a first coupling electrode, a second coupling electrode, and a third coupling electrode coupled to anodes of the first inorganic light-emitting element, the second inorganic light-emitting element, and the third inorganic light-emitting element, respectively, and a distance between a surface of the flattening layer and the first coupling electrode in a direction perpendicular to the substrate is shorter than a distance between the surface of the flattening layer and the second coupling electrode and a distance between the surface of the flattening layer and the third coupling electrode. ### Claim 11 (depends on 9) The display device according to claim 9, further comprising: a flattening layer covering at least a side surface of the first inorganic light-emitting element, the second inorganic light-emitting element, and the third inorganic light-emitting element; and a scattering member provided on the flattening layer to cover the first inorganic light-emitting element, the second inorganic light-emitting element, and the third inorganic light-emitting element and including a plurality of scattering particles, wherein the scattering member includes a first scattering region overlapping the first inorganic light-emitting element, a second scattering region overlapping the second inorganic light-emitting element, and a third scattering region overlapping the third inorganic light-emitting element, and density of the scattering particles of the first scattering region is higher than density of the scattering particles of the second scattering region and the third scattering region. ### Claim 12 (depends on 9) The display device according to claim 9, wherein the first inorganic light-emitting element outputs red light, the second inorganic light-emitting element outputs green light, and the third inorganic light-emitting element outputs blue light. ### Claim 13 (depends on 1) The display device according to claim 1, further comprising: a switching element provided to the substrate corresponding to each of the inorganic light-emitting elements; and a second electrode provided to the substrate and that electrically couples the anode of the inorganic light-emitting element and the switching element, wherein the second electrode has a larger area than the inorganic light-emitting element when viewed from a direction perpendicular to the substrate.