# US 12,772,622 B2 · Light emitting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,772,622 B2 - Document ID: US12772622B2 - Status: Granted - Kind: B2 - Application number: 18/323,335 - Filed: 2023-05-24 - Published: 2023-11-30 - Granted: 2026-10-20 - Earliest claimed: 2022-05-26 - Assignees: Nichia Corporation - Applicants: Nichia Corporation - Inventors: Soichiro Miura - Web page: https://patentgrep.com/patent/US12772622B2 ## CPC - H10H 20/8506: {Containers} - H10H 20/8514: {characterised by their shape, e.g. plate or foil} - H10H 20/856: Reflecting means - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS ## Abstract A light emitting device includes a package including a base member, a frame member having a plurality of inner lateral surfaces, and a cover, a light emitting element surrounded by the frame member and disposed on an upper surface of the base member, the light emitting element configured to emit directional light traveling in a lateral direction, and a light receiving body surrounded by the frame member and disposed on the upper surface of the base member in the lateral direction of the light emitting element to receive the light. The light receiving body has a first lateral surface facing the light emitting element and a second lateral surface opposite to the first lateral surface. The second lateral surface of the light receiving body faces a first opposing surface arranged adjacent to the second lateral surface with a space between the second lateral surface and the first opposing surface. ## Claims ### Claim 1 A light emitting device comprising: a package including a base member, a frame member having a plurality of inner lateral surfaces, and a cover; a light emitting element surrounded by the frame member and disposed on an upper surface of the base member, the light emitting element being configured to emit directional light traveling in a lateral direction; and a light receiving body surrounded by the frame member and disposed on the upper surface of the base member at a lateral side of the light emitting element to receive the light, wherein the cover has a lower surface, at least a part of the lower surface of the cover being located over the light receiving body and the light emitting element, when an optical axis direction of the directional light emitted from the light emitting element is a first direction, the plurality of inner lateral surfaces of the package include a first inner lateral surface and a second inner lateral surface facing each other in a second direction perpendicular to the first direction in a top view, the light emitting element is disposed in a first arrangement region located between the first inner lateral surface and the second inner lateral surface, in the second direction, a length of the light receiving body is longer than a distance between the first inner lateral surface and the second inner lateral surface, in a third direction perpendicular to the upper surface of the base member, a height of an upper surface of the light receiving body from the upper surface of the base member is higher than a height of an upper surface of the light emitting element from the upper surface of the base member, a height of a lower surface of the light receiving body from the upper surface of the base member is lower than a height of a lower surface of the light emitting element from the upper surface of the base member, and a length of the light receiving body is longer than a distance from the upper surface of the light emitting element to the lower surface of the cover, the light receiving body has a first lateral surface facing the light emitting element and a second lateral surface opposite to the first lateral surface, and the second lateral surface of the light receiving body faces a first opposing surface arranged adjacent to the second lateral surface with a space being formed between the second lateral surface and the first opposing surface. ### Claim 2 (depends on 1) The light emitting device as claimed in claim 1, wherein the plurality of inner lateral surfaces of the package include a third inner lateral surface and a fourth inner lateral surface facing each other in the second direction, the light receiving body is disposed in a second arrangement region located between the third inner lateral surface and the fourth inner lateral surface, the light receiving body further includes a third lateral surface meeting the second lateral surface and extending in the first direction, and a fourth lateral surface meeting the second lateral surface and extending in the first direction, and the third lateral surface of the light receiving body faces a second opposing surface arranged adjacent to the third lateral surface with a space being formed between the third lateral surface and the second opposing surface, and the fourth lateral surface of the light receiving body faces a third opposing surface arranged adjacent to the fourth lateral surface with a space being formed between the fourth lateral surface and the third opposing surface. ### Claim 3 (depends on 2) The light emitting device as claimed in claim 2, wherein in the second direction, a distance between the third inner lateral surface and the fourth inner lateral surface is longer than a distance between the first inner lateral surface and the second inner lateral surface. ### Claim 4 (depends on 2) The light emitting device as claimed in claim 2, wherein the third inner lateral surface constitutes the second opposing surface, and the fourth inner lateral surface constitutes the third opposing surface. ### Claim 5 (depends on 2) The light emitting device as claimed in claim 2, wherein in the second direction, a length of the space between the second opposing surface and the third lateral surface of the light receiving body is 50 μm or more and 400 μm or less, and a length of the space between the third opposing surface and the fourth lateral surface of the light receiving body is 50 μm or more and 400 μm or less. ### Claim 6 (depends on 2) The light emitting device as claimed in claim 2, wherein the plurality of inner lateral surfaces of the package further include a fifth inner lateral surface that connects the third inner lateral surface and the fourth inner lateral surface, the fifth inner lateral surface is located on an opposite side of the light receiving body from the light emitting element, and the fifth inner lateral surface constitutes the first opposing surface. ### Claim 7 (depends on 1) The light emitting device as claimed in claim 1, wherein in the first direction, a length of the space between the first opposing surface and the second lateral surface of the light receiving body is 50 μm or more and 400 μm or less. ### Claim 8 (depends on 1) The light emitting device as claimed in claim 1, wherein a space is formed between the upper surface of the light receiving body and the lower surface of the cover, and in the third direction, a length of the space between the upper surface of the light receiving body and the lower surface of the cover is 50 μm or more and 400 μm or less. ### Claim 9 (depends on 1) The light emitting device as claimed in claim 1, wherein the light receiving body is bonded to a member only at the lower surface of the light receiving body. ### Claim 10 (depends on 1) The light emitting device as claimed in claim 1, wherein in the first direction, a length of the light receiving body is longer than a length of the light emitting element. ### Claim 11 (depends on 1) The light emitting device as claimed in claim 1, further comprising a submount disposed on the upper surface of the base member, wherein the lower surface of the light receiving body is bonded to an upper surface of the submount via a bonding member. ### Claim 12 (depends on 11) The light emitting device as claimed in claim 11, wherein the upper surface of the submount is not located above the lower surface of the light emitting element. ### Claim 13 (depends on 1) The light emitting device as claimed in claim 1, wherein the light receiving body further includes an incident lateral surface and an emission surface, such that light emitted from an emission end surface of the light emitting element enters the incident lateral surface, and the light having entered the incident lateral surface is emitted from the emission surface, the incident lateral surface constitutes at least a part of the first lateral surface, the light receiving body further includes a protrusion protruding outwardly toward the light emitting element above the incident lateral surface, and the protrusion of the light receiving body overlaps the emission end surface of the light emitting element in the top view. ### Claim 14 (depends on 13) The light emitting device as claimed in claim 13, wherein in the first direction, a distance from the incident lateral surface of the light receiving body to the emission end surface of the light emitting element is 400 μm or less. ### Claim 15 (depends on 13) The light emitting device as claimed in claim 13, wherein the emission surface of the light receiving body is located on the upper surface of the light receiving body to upwardly emit the light having entered the incident lateral surface. ### Claim 16 (depends on 13) The light emitting device as claimed in claim 13, wherein at least a part of the incident lateral surface of the light receiving body is located below an optical axis of the light emitted from the light emitting element. ### Claim 17 (depends on 3) The light emitting device as claimed in claim 3, wherein in the first direction, one of ends of the third inner lateral surface that is closer to the second lateral surface of the light receiving body is spaced apart from one of ends of the first inner lateral surface that is closer to the second lateral surface of the light receiving body, and one of ends of the fourth inner lateral surface that is closer to the second lateral surface of the light receiving body is spaced apart from one of ends of the second inner lateral surface that is closer to the second lateral surface of the light receiving body.