# US 12,191,341 B2 · Light emitting panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,191,341 B2 - Document ID: US12191341B2 - Status: Granted - Kind: B2 - Application number: 17/842,186 - Filed: 2022-06-16 - Published: 2023-01-19 - Granted: 2025-01-07 - Earliest claimed: 2021-07-13 - Assignees: Au Optronics Corporation - Applicants: Au Optronics Corporation - Inventors: Shiw Chieh Wang; Kuan-Hsien Wu; Kuo-Yu Huang; You-Yuan Hu; Shih-Pin Cheng - Web page: https://patentgrep.com/patent/US12191341B2 ## CPC - H10H 20/856: Reflecting means - H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout} - H10H 20/814: having reflecting means, e.g. semiconductor Bragg reflectors - H10W 90/00: Package configurations - 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 The present invention provides a light emitting panel, which includes: a substrate, at least one light emitting element disposed on the substrate, and a reflective structure layer. The reflective structure layer includes a plurality of first microstructure units disposed on the substrate and distributed around the at least one light emitting element, and a plurality of second microstructure units disposed on and overlapping the first microstructure units. A spacing between adjacent first microstructure units among the first microstructure units is less than a spacing between adjacent second microstructure units among the second microstructure units. ## Claims ### Claim 1 A light emitting panel, comprising: a substrate; at least one light emitting element, disposed on the substrate; and a reflective structure layer, comprising: a plurality of first microstructure units, disposed on the substrate and distributed around the at least one light emitting element, and a plurality of second microstructure units, disposed on and overlapping the first microstructure units, wherein a spacing between adjacent first microstructure units among the first microstructure units is less than a spacing between adjacent second microstructure units among the second microstructure units. ### Claim 2 (depends on 1) The light emitting panel according to claim 1, wherein a distribution density of the first microstructure units is higher than a distribution density of the second microstructure units. ### Claim 3 (depends on 1) The light emitting panel according to claim 1, wherein each of the second microstructure units at least partially overlaps and covers more than one first microstructure units among the first microstructure units. ### Claim 4 (depends on 1) The light emitting panel according to claim 1, wherein a part of the first microstructure units among the first microstructure units are disposed without overlapping the second microstructure units. ### Claim 5 (depends on 1) The light emitting panel according to claim 1, wherein a minimum cross-sectional area of each of the first microstructure units in a height direction is less than a minimum cross-sectional area of each of the second microstructure units in the height direction. ### Claim 6 (depends on 1) The light emitting panel according to claim 1, wherein a base angle of each of the first microstructure units is less than a base angle of each of the second microstructure units. ### Claim 7 (depends on 1) The light emitting panel according to claim 1, wherein the reflective structure layer further comprises a reflective layer disposed to cover the second microstructure units and a part of the first microstructure units not covered by the second microstructure units. ### Claim 8 (depends on 1) The light emitting panel according to claim 1, wherein the first microstructure units are distributed in a ring shape around the at least one light emitting element. ### Claim 9 (depends on 8) The light emitting panel according to claim 8, wherein a part of the first microstructure units is distributed in a form of concentric circles around one of the at least one light emitting element. ### Claim 10 (depends on 1) The light emitting panel according to claim 1, wherein the second microstructure units are distributed in a ring shape around the at least one light emitting element. ### Claim 11 (depends on 10) The light emitting panel according to claim 10, wherein a part of the second microstructure units is distributed in a form of concentric circles around one of the at least one light emitting element. ### Claim 12 (depends on 1) The light emitting panel according to claim 1, wherein the first microstructure units, the second microstructure units, or combinations thereof are distributed in a rectangular array. ### Claim 13 (depends on 1) The light emitting panel according to claim 1, wherein a part of the second microstructure units among the second microstructure units forms a second microstructure unit set, the second microstructure units in the second microstructure unit set are distributed around a first light emitting element of the at least one light emitting element, and a spacing between two adjacent ones of the second microstructure units in the second microstructure unit set increases as a distance from the first light emitting element that is surrounded increases. ### Claim 14 (depends on 1) The light emitting panel according to claim 1, wherein a part of the second microstructure units among the second microstructure units forms a second microstructure unit set, the second microstructure units in the second microstructure unit set are distributed around a first light emitting element of the at least one light emitting element, and sizes of the second microstructure units in the second microstructure unit set decrease as a distance from the first light emitting element that is surrounded increases. ### Claim 15 (depends on 1) The light emitting panel according to claim 1, wherein the reflective structure layer further comprises a bottom layer disposed under the first microstructure units, wherein a part of the first microstructure units among the first microstructure units forms a first microstructure unit set, the first microstructure units in the first microstructure unit set are distributed around a first light emitting element of the at least one light emitting element, and a height of the bottom layer under the first microstructure units in the first microstructure unit set increases as a distance from the first light emitting element that is surrounded increases. ### Claim 16 (depends on 1) The light emitting panel according to claim 1, wherein the at least one light emitting element comprises a first light emitting element, a second light emitting element, and a third light emitting element, wherein the first light emitting element, the second light emitting element, and the third light emitting element are non-collinearly staggered along a first direction. ### Claim 17 (depends on 1) The light emitting panel according to claim 1, wherein a part of the first microstructure units among the first microstructure units forms a first microstructure unit set, and the first microstructure units in the first microstructure unit set are distributed around a first light emitting element of the at least one light emitting element to form a plurality of rows, wherein the first microstructure units are arranged in each of the plurality of rows along a first direction, and the first microstructure units in two adjacent rows are not aligned in a second direction perpendicular to the first direction. ### Claim 18 (depends on 1) The light emitting panel according to claim 1, wherein a part of the second microstructure units among the second microstructure units forms a second microstructure unit set, and the second microstructure units in the second microstructure unit set are distributed around a first light emitting element of the at least one light emitting element to form a plurality of rows, wherein the second microstructure units are arranged in each of the plurality of rows along a first direction, and the second microstructure units in two adjacent rows are not aligned in a second direction perpendicular to the first direction. ### Claim 19 (depends on 1) The light emitting panel according to claim 1, wherein a base angle of each of the second microstructure units is between 20 degrees and 50 degrees. ### Claim 20 (depends on 1) The light emitting panel according to claim 1, wherein among the second microstructure units distributed around a first light emitting element of the at least one light emitting element, a base angle of the second microstructure unit at a larger distance from the first light emitting element is greater than a base angle of the second microstructure unit at a smaller distance from the first light emitting element. ### Claim 21 (depends on 1) The light emitting panel according to claim 1, wherein heights of the first microstructure units range from 1 μm to 5 μm.