# US 12,604,570 B2 · Light-emitting device and display device having same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,570 B2 - Document ID: US12604570B2 - Status: Granted - Kind: B2 - Application number: 17/295,403 - Filed: 2019-05-20 - Published: 2022-01-06 - Granted: 2026-04-14 - Earliest claimed: 2018-11-21 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Hyun Deok Im; Jong Hyuk Kang; Hyun Min Cho - Web page: https://patentgrep.com/patent/US12604570B2 ## CPC - H10H 20/8316: {Multi-layer electrodes comprising at least one discontinuous layer} - H10H 20/856: Reflecting means - H10H 20/819: characterised by their shape, e.g. curved or truncated substrates - H10H 20/835: {Reflective materials} - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout} - 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 A light emitting device may include: an emission area; an insulating pattern in the emission area, the insulating pattern including at least one recess and a protrusion around the recess; a first electrode on the insulating pattern and overlapping a first area of the recess and the protrusion in a periphery of the first area; a second electrode on the insulating pattern and spaced from the first electrode in a first direction, the second electrode overlapping a second area of the recess and the protrusion in a periphery of the second area; and a light emitting diode in the recess and electrically connected between the first electrode and the second electrode. ## Claims ### Claim 1 A light emitting device comprising: an emission area; an insulating pattern in the emission area, the insulating pattern comprising at least one recess and a protrusion around the recess; a first electrode on the insulating pattern and a first area of the recess and the protrusion in a periphery of the first area; a second electrode on the insulating pattern and spaced in a plan view from the first electrode in a first direction that is perpendicular to a thickness direction of the light emitting device, the second electrode overlapping a second area of the recess and the protrusion in a periphery of the second area, the first electrode and the second electrode being at a same layer; an insulating layer on the recess and covering the first electrode and the second electrode; and a light emitting diode over the insulating layer on the recess and electrically connected between the first electrode and the second electrode, p1 wherein the insulating layer is formed to be concave along the recess. ### Claim 2 (depends on 1) The light emitting device according to claim 1, wherein the recess comprises, in a perimeter area thereof adjacent to the protrusion, an inclined surface having an inclination within an angular range. ### Claim 3 (depends on 2) The light emitting device according to claim 2, wherein each of the first electrode and the second electrode comprises a bent portion having a bent shape on each of an upper end and a lower end of the inclined surface. ### Claim 4 (depends on 1) The light emitting device according to claim 1, wherein the recess has a circular shape, an elliptical shape, a polygonal shape, or a combination thereof, in a plan view. ### Claim 5 (depends on 1) The light emitting device according to claim 1, wherein the recess includes an opening. ### Claim 6 (depends on 1) The light emitting device according to claim 1, wherein the recess has a width greater than a length of the light emitting diode in the first direction. ### Claim 7 (depends on 1) The light emitting device according to claim 1, wherein the recess has an identical width in the first direction and a second direction perpendicular to the first direction. ### Claim 8 (depends on 1) The light emitting device according to claim 1, wherein the light emitting diode comprises a rod-type light emitting diode comprising a first end and a second end on opposite ends thereof in a longitudinal direction. ### Claim 9 (depends on 8) The light emitting device according to claim 8, further comprising: a first contact electrode on the first end of the light emitting diode and one area of the first electrode to electrically connect the first end to the first electrode; and a second contact electrode on the second end of the light emitting diode and one area of the second electrode to electrically connect the second end to the second electrode. ### Claim 10 (depends on 1) The light emitting device according to claim 1, further comprising a reflective electrode on the insulating layer adjacent to the light emitting diode, and including an opening corresponding to the light emitting diode. ### Claim 11 (depends on 10) The light emitting device according to claim 10, wherein each of the first electrode and the second electrode extends in a second direction intersecting with the first direction, and wherein the reflective electrode comprises at least one first directional pattern extending in the first direction and crossing the first electrode and the second electrode. ### Claim 12 (depends on 1) The light emitting device according to claim 1, wherein the insulating pattern comprises a plurality of recesses located at intervals, and wherein at least one light emitting diode is in each of the plurality of recesses. ### Claim 13 A display device comprising: a display area; and a pixel in the display area and including an emission area, wherein the pixel comprises: an insulating pattern in the emission area, the insulating pattern comprising at least one recess and a protrusion around the recess; a first electrode on the insulating pattern and overlapping a first area of the recess and the protrusion in a periphery of the first area; a second electrode on the insulating pattern and spaced in a plan view from the first electrode in a first direction that is perpendicular to a thickness direction of the display device, the second electrode overlapping a second area of the recess and the protrusion in a periphery of the second area, the first electrode and the second electrode being at a same layer; an insulating layer on the recess and covering the first electrode and the second electrode; and a light emitting diode over the insulating layer on the recess and electrically connected between the first electrode and the second electrode, and wherein the insulating layer is formed to be concave along the recess. ### Claim 14 (depends on 13) The display device according to claim 13, wherein the recess comprises, in a perimeter area thereof adjacent to the protrusion, an inclined surface having an inclination within an angular range, and wherein each of the first electrode and the second electrode comprises a bent portion having a bent shape on each of an upper end and a lower end of the inclined surface. ### Claim 15 (depends on 13) The display device according to claim 13, wherein the recess has a circular shape, an elliptical shape, a polygonal shape, or a combination thereof, in a plan view. ### Claim 16 (depends on 13) The display device according to claim 13, wherein the recess includes an opening. ### Claim 17 (depends on 13) The display device according to claim 13, wherein the recess has a width greater than a length of the light emitting diode in the first direction. ### Claim 18 (depends on 13) The display device according to claim 13, wherein the pixel comprises a reflective electrode on the insulating layer adjacent to the light emitting diode, and including an opening corresponding to the light emitting diode. ### Claim 19 (depends on 13) The display device according to claim 13, wherein the insulating pattern comprises a plurality of recesses located at intervals in the emission area, and wherein at least one light emitting diode is in each of the plurality of recesses.