# US 10,768,353 B2 · Method of manufacturing light emitting module and light emitting module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,768,353 B2 - Document ID: US10768353B2 - Status: Granted - Kind: B2 - Application number: 16/024,018 - Filed: 2018-06-29 - Published: 2019-02-14 - Granted: 2020-09-08 - Earliest claimed: 2017-06-30 - Assignees: Nichia Corporation - Applicants: Nichia Corporation - Inventors: Tadao Hayashi; Ryohei Yamashita; Yusaku Achi; Mamoru Imada - Web page: https://patentgrep.com/patent/US10768353B2 ## CPC - G02B 6/0016: {Grooves, prisms, gratings, scattering particles or rough surfaces} - G02B 6/0026: {Wavelength selective element, sheet or layer, e.g. filter or grating} - G02B 6/0031: {Reflecting element, sheet or layer} - G02B 6/0051: {Diffusing sheet or layer} - G02F 1/133603: {with LEDs} - G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members} - H10H 20/8511: {characterised by their material, e.g. binder} - H10W 90/00: Package configurations - G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses} - H10H 20/0363: {of optical field-shaping means} - H10H 20/851: Wavelength conversion means - H10H 20/855: Optical field-shaping means, e.g. lenses - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - 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 method of manufacturing a light emitting module according to the present disclosure includes: preparing a light guide plate that comprises a first main surface serving as a light-emitting surface and a second main surface opposite to the first main surface; respectively providing light emitting elements on the second main surface so as to correspond to each of a plurality of optically functional portions provided on the first main surface of the light guide plate; and forming wires electrically connecting the plurality of light emitting elements. ## Claims ### Claim 1 A method of manufacturing a light emitting module comprising: preparing a light guide plate that comprises a first main surface serving as a light-emitting surface and a second main surface opposite to the first main surface; providing a plurality of optically functional portions at the first surface of the light guide plate; forming a plurality of concave portions on a side of the second main surface so as to overlap with each of the optically functional portions in a planar perspective projection; disposing a wavelength conversion material in the concave portions to form a plurality of wavelength conversion portions; disposing a light-transmissive joining member on each of the wavelength conversion material of the plurality of wavelength conversion portions; providing each of a plurality of light emitting elements on each of the wavelength conversion material of the plurality of wavelength conversion portions, wherein the plurality of light emitting elements are joined to the wavelength conversion material by the light-transmissive joining member, and wherein the light-transmissive joining member is provided to cover side surfaces of the light emitting element and is formed in a shape that expands toward the light guide plate in a cross-sectional view; and forming wires electrically connecting the plurality of light emitting elements. ### Claim 2 (depends on 1) The method of manufacturing a light emitting module according to claim 1, wherein preparing a light guide plate comprises forming concave portions to form the optically functional portions. ### Claim 3 (depends on 1) The method of manufacturing a light emitting module according to claim 1, wherein a size in the top view of each of the optically functional portions is larger than a size in the top view of each of the light emitting elements. ### Claim 4 (depends on 1) The method of manufacturing a light emitting module according to claim 1, wherein each of the optically functional portions comprises a central concave portion and annular convex portion surrounding the convex portion. ### Claim 5 (depends on 2) The method of manufacturing a light emitting module according to claim 2, wherein the concave portions are formed so that side surfaces of the concave portions have spiral groove portions. ### Claim 6 (depends on 1) The method of manufacturing a light emitting module according to claim 1, further comprising forming light-scattering portions, each being disposed between adjacent optically functional portions. ### Claim 7 (depends on 1) The method of manufacturing a light emitting module according to claim 1, further comprising forming light-reflective concave portions disposed between adjacent light emitting elements on a side of the second main surface. ### Claim 8 (depends on 7) The method of manufacturing a light emitting module according to claim 7, wherein two or more light-reflective concave portions are disposed between the adjacent light emitting elements. ### Claim 9 (depends on 1) The method of manufacturing a light emitting module according to claim 1, further comprising forming light-reflective sealing member to cover side surfaces of the light emitting element and the second main surface of the light guide plate. ### Claim 10 (depends on 9) The method of manufacturing a light emitting module according to claim 9, wherein the light-reflective sealing member is formed to be in contact with the light-transmissive joining member. ### Claim 11 (depends on 9) The method of manufacturing a light emitting module according to claim 9, wherein the light-reflective sealing member is formed in light-reflective concave portions in the second main surface of the light guide plate. ### Claim 12 (depends on 1) The method of manufacturing a light emitting module according to claim 1, wherein the light emitting element includes a sapphire substrate, and wherein the light-transmissive joining member is provided to cover at least a part of the side surface of the sapphire substrate.