# US 12,215,857 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 12,215,857 B2 - Document ID: US12215857B2 - Status: Granted - Kind: B2 - Application number: 18/258,880 - Filed: 2021-12-22 - Published: 2024-02-08 - Granted: 2025-02-04 - Earliest claimed: 2020-12-24 - Assignees: Nichia Corporation - Applicants: Nichia Corporation - Inventors: Tadayuki Kitajima - Web page: https://patentgrep.com/patent/US12215857B2 ## CPC - F21V 7/04: Optical design - H10H 20/856: Reflecting means - F21S 41/16: Laser light sources - F21V 9/30: Elements containing photoluminescent material distinct from or spaced from the light source (shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40) - H01S 5/0087: {for illuminating phosphorescent or fluorescent materials, e.g. using optical arrangements specifically adapted for guiding or shaping laser beams illuminating these materials} - H01S 5/02208: characterised by the shape of the housings - H01S 5/02255: using beam deflecting elements - H01S 5/02257: using windows, e.g. specially adapted for back-reflecting light to a detector inside the housing - H01S 5/4093: {Red, green and blue [RGB] generated directly by laser action or by a combination of laser action with nonlinear frequency conversion} - H10W 90/00: Package configurations - F21S 41/192: {Details of lamp holders, terminals or connectors} - F21Y 2113/00: Combination of light sources - H01S 5/005: {Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping (H01S5/026, H01S5/18388 take precedence)} - H01S 5/4025: {Array arrangements, e.g. constituted by discrete laser diodes or laser bar (H01S5/42 takes precedence)} - H10H 20/8515: {not being in contact with the bodies} - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED ## Abstract A light emitting device includes: a base member including a mounting surface, a first light-emitting element that is disposed on the mounting surface and emits light passing along a first optical axis, a second light-emitting element that is disposed on the mounting surface and emits light passing along a second optical axis, a third light-emitting element that is disposed on the mounting surface and emits light passing along a third optical axis, and one or more light reflective members including a first light reflective surface that includes a first position to be irradiated with the light passing along the first optical axis, a second light reflective surface that includes a second position to be irradiated with the light passing along the second optical axis and, and a third light reflective surface that includes a third position to be irradiated with the light passing along the third optical axis. ## Claims ### Claim 1 A light emitting device comprising: a base member having a mounting surface; a first light-emitting element disposed on the mounting surface and configured to emit light passing along a first optical axis; a second light-emitting element disposed on the mounting surface and configured to emit light passing along a second optical axis; a third light-emitting element disposed on the mounting surface and configured to emit light passing along a third optical axis; and one or more light reflective members having a first light reflective surface, a second light reflective surface, and a third light reflective surface, the first light reflective surface including a first position to be irradiated with the light passing along the first optical axis and being inclined relative to the mounting surface, the second light reflective surface including a second position to be irradiated with the light passing along the second optical axis and being inclined relative to the mounting surface, the third light reflective surface including a third position to be irradiated with the light passing along the third optical axis and being inclined relative to the mounting surface, wherein: in a top view, when the mounting surface is divided into a first region and a second region by a virtual first straight line passing through the second position and the third position as a boundary, the first light-emitting element is disposed in the first region, and the second light-emitting element and the third light-emitting element are disposed in the second region, in the top view, the second light reflective surface and the third light reflective surface sandwich the first light reflective surface, in the top view, the light passing along the first optical axis coincides with a normal line to the first light reflective surface at the first position, in the top view, the light passing along the second optical axis and a normal line to the second light reflective surface at the second position form an acute angle, and in the top view, the light passing along the third optical axis and a normal line to the third light reflective surface at the third position form an acute angle. ### Claim 2 (depends on 1) The light emitting device according to claim 1, wherein in the top view, when the mounting surface is divided into a third region and a fourth region by a virtual second strai ght line passing along the first optical axis as a boundary, the second light-emitting element is disposed in the third region and the third light-emitting element is disposed in the fourth region. ### Claim 3 (depends on 2) The light emitting device according to claim 2, wherein in the top view, the second light-emitting element and the third light-emitting element are line-symmetric relative to the second straight line. ### Claim 4 (depends on 2) The light emitting device according to claim 2, wherein in the top view, a center of the mounting surface overlaps the first light reflective surface, the second light reflective surface is disposed in the third region, and the third light reflective surface is disposed in the fourth region. ### Claim 5 (depends on 2) The light emitting device according to claim 2, wherein in the top view, the second light reflective surface and the third light reflective surface are line-symmetric relative to the second straight line. ### Claim 6 (depends on 1) The light emitting device according to claim 1, wherein in the top view, the first light reflective surface is disposed on the virtual first straight line. ### Claim 7 (depends on 6) The light emitting device according to claim 6, wherein in the top view, the first position, the second position, and the third position are disposed on a straight line. ### Claim 8 (depends on 1) The light emitting device according to claim 1, wherein the second light reflective surface and the third light reflective surface are located on a virtual first plane, and the first light reflective surface is located on a virtual second plane not coplanar with the virtual first plane. ### Claim 9 (depends on 1) The light emitting device according to claim 1, wherein light from the first light-emitting element reflected by the first light reflective surface, light from the second light-emitting element reflected by the second light reflective surface, and light from the third light-emitting element reflected by the third light reflective surface approach one another, and are superimposed in a region overlapping the first position and not overlapping the second position and the third position in the top view. ### Claim 10 (depends on 1) The light emitting device according to claim 1, further comprising: a wavelength conversion member where light from the first light-emitting element reflected by the first light reflective surface, light from the second light-emitting element reflected by the second light reflective surface, and light from the third light-emitting element reflected by the third light reflective surface enter. ### Claim 11 (depends on 1) The light emitting device according to claim 1, wherein: the first light-emitting element, the second light-emitting element, and the third light-emitting element are electrically connected in series, a plurality of wiring regions including a first wiring region included in a current path between the first light-emitting element and the second light-emitting element, a second wiring region included in a current path between the second light-emitting element and the third light-emitting element, and a third wiring region included in a current path between the third light-emitting element and the first light-emitting element, are formed on the mounting surface, and in the top view, a part or a whole of the second wiring region is formed in a region, in the second region, sandwiched between a virtual third straight line passing along the second optical axis and a virtual fourth straight line passing along the third optical axis. ### Claim 12 (depends on 1) The light emitting device according to claim 1, further comprising: a temperature measuring element disposed on the mounting surface in the first region; and a protective element disposed on the mounting surface in the first region. ### Claim 13 A light emitting device comprising: a base member having a mounting surface; a first light-emitting element disposed on the mounting surface and configured to emit light passing along a first optical axis; a second light-emitting element disposed on the mounting surface and configured to emit light passing along a second optical axis; a third light-emitting element disposed on the mounting surface and configured to emit light passing along a third optical axis; and one or more light reflective members having a first light reflective surface, a second light reflective surface, and a third light reflective surface, the first light reflective surface including a first position to be irradiated with the light passing along the first optical axis and being inclined relative to the mounting surface, the second light reflective surface including a second position to be irradiated with the light passing along the second optical axis and being inclined relative to the mounting surface, the third light reflective surface including a third position to be irradiated with the light passing along the third optical axis and being inclined relative to the mounting surface, wherein: in a top view, when the mounting surface is divided into a first region and a second region by a virtual first straight line passing through the second position and the third position as a boundary, the first light-emitting element is disposed in the first region, and the second light-emitting element and the third light-emitting element are disposed in the second region, in the top view, the second light reflective surface and the third light reflective surface sandwich the first light reflective surface, and light from the first light-emitting element reflected by the first light reflective surface, light from the second light-emitting element reflected by the second light reflective surface, and light from the third light-emitting element reflected by the third light reflective surface approach one another, and are superimposed in a region overlapping the first position and not overlapping the second position and the third position in the top view. ### Claim 14 A light emitting device comprising: a base member having a mounting surface; a first light-emitting element disposed on the mounting surface and configured to emit light passing along a first optical axis; a second light-emitting element disposed on the mounting surface and configured to emit light passing along a second optical axis; a third light-emitting element disposed on the mounting surface and configured to emit light passing along a third optical axis; and one or more light reflective members having a first light reflective surface, a second light reflective surface, and a third light reflective surface, the first light reflective surface including a first position to be irradiated with the light passing along the first optical axis and being inclined relative to the mounting surface, the second light reflective surface including a second position to be irradiated with the light passing along the second optical axis and being inclined relative to the mounting surface, the third light reflective surface including a third position to be irradiated with the light passing along the third optical axis and being inclined relative to the mounting surface, wherein: in a top view, when the mounting surface is divided into a first region and a second region by a virtual first straight line passing through the second position and the third position as a boundary, the first light-emitting element is disposed in the first region, and the second light-emitting element and the third light-emitting element are disposed in the second region, in the top view, the second light reflective surface and the third light reflective surface sandwich the first light reflective surface, the first light-emitting element, the second light-emitting element, and the third light-emitting element are electrically connected in series, a plurality of wiring regions including a first wiring region included in a current path between the first light-emitting element and the second light-emitting element, a second wiring region included in a current path between the second light-emitting element and the third light-emitting element, and a third wiring region included in a current path between the third light-emitting element and the first light-emitting element, are formed on the mounting surface, and in the top view, a part or a whole of the second wiring region is formed in a region, in the second region, sandwiched between a virtual third straight line passing along the second optical axis and a virtual fourth straight line passing along the third optical axis.