# US 2010/0164346 A1 · Light emitting device with phosphor wavelength conversion > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0164346 A1 - Document ID: US20100164346A1 - Status: Published application - Kind: A1 - Application number: 12/639,688 - Filed: 2009-12-16 - Published: 2010-07-01 - Earliest claimed: 2008-12-31 - Assignees: Intematix Corporation - Inventors: Yi-Qun Li; Haitao Yang - Web page: https://patentgrep.com/patent/US20100164346A1 ## CPC - F21S 10/02: changing colors {(F21S10/002 - F21S10/007, F21S10/04 take precedence)} - F21V 7/0008: {providing for indirect lighting} - F21V 7/06: with parabolic curvature - F21V 7/30: the coatings comprising photoluminescent substances - H10H 20/8513: {having two or more wavelength conversion materials} - F21Y 2115/10: Light-emitting diodes [LED] - H10H 20/8515: {not being in contact with the bodies} - H10W 72/07554: {changes in dispositions} - H10W 72/547: {Dispositions of multiple bond wires} - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - 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 - 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 - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A light emitting device comprises: a thermally conductive substrate (MCPCB); at least one LED mounted in thermal communication with a surface of the substrate; a housing attached to the substrate and configured such the housing and substrate together define a volume that totally encloses the at least one LED, the housing comprising at least a part that is light transmissive (window); and at least one phosphor material provided on an inner surface of the housing within said volume said phosphor being operable to absorb at least a part of the excitation light emitted by the at least one light emitting diode and to emit light of a second wavelength range. The housing is attached to the substrate such that the volume is substantially water tight, preferably air/gas tight. ## Claims ### Claim 1 A light emitting device comprising: a thermally conductive substrate; at least one light emitting diode mounted in thermal communication with a surface of the substrate and operable to emit excitation light having a dominant wavelength in a first wavelength range; a housing attached to the substrate and configured such that the housing and substrate together define a volume that totally encloses the at least one light emitting diode, the housing comprising at least a part that is light transmissive; and at least one phosphor material provided on an inner surface of the housing within said volume, said phosphor being operable to absorb at least a part of the excitation light and to emit light having a dominant wavelength in a second wavelength range; and wherein the housing is attached to the substrate such that the volume is at least water tight. ### Claim 2 (depends on 1) The device of claim 1, wherein an emission product of the device comprises light of the first and second wavelength ranges and appears white in color. ### Claim 3 (depends on 1) The device of claim 1, and comprising a plurality of light emitting diodes mounted in thermal communication with a surface of the substrate and wherein the housing is configured such that the housing and substrate together define a volume that totally encloses the plurality of light emitting diodes. ### Claim 4 (depends on 1) The device of claim 1, wherein the device has an emission product of intensity selected from the group consisting of: at least 50 lumens; at least 100 lumens; at least 250 lumens; and at least 500 lumens. ### Claim 5 (depends on 1) The device of claim 1, and further comprising at least partially filling the volume with a light transmissive thermally conductive material. ### Claim 6 (depends on 5) The device of claim 5, wherein the light transmissive thermally conductive material is selected from the group consisting of: a gel; a mineral oil; and a thermally conductive polymer. ### Claim 7 (depends on 1) The device of claim 1, wherein the housing is attached to the substrate such that the volume is substantially gas tight. ### Claim 8 (depends on 7) The device of claim 7, and further comprising filling the volume with a gas selected from the group consisting of: nitrogen; neon; argon; krypton; and xenon. ### Claim 9 (depends on 1) The device of claim 1, wherein the housing is attached to the substrate by a method selected from the group consisting of: soldering; brazing; adhesive; and a metal loaded epoxy. ### Claim 10 (depends on 1) The device according to claim 1, wherein the part of the housing that is light transmissive comprises an opening covered by a window attached to the housing. ### Claim 11 (depends on 10) The device according to claim 10, wherein the window is attached to the housing by a method selected from the group consisting of: soldering; an adhesive; and a compression seal. ### Claim 12 (depends on 11) The device of claim 11, wherein the window is selected from the group consisting of: a glass; a silica glass; a quartz glass, transparent alumina, a polymer material; a polycarbonate; and an acrylic. ### Claim 13 (depends on 12) The device of claim 12, wherein the housing comprises a thermally conductive material selected from the group consisting of: a metal; an invar alloy, aluminum; copper; a thermally conductive polymer; and a thermally conductive ceramic. ### Claim 14 (depends on 1) The device of claim 1, wherein the housing comprises a substantially parabolic reflector. ### Claim 15 (depends on 1) The device of claim 1, wherein the housing comprises a material that is light transmissive. ### Claim 16 (depends on 15) The device of claim 15, wherein the housing is selected from the group consisting of: a glass; silica glass; quartz glass; transparent alumina; a polymer material; a polycarbonate; and an acrylic. ### Claim 17 (depends on 15) The device of claim 15, wherein the housing comprises a hemispherical shell. ### Claim 18 (depends on 1) The device of claim 1, wherein the substrate is selected from the group consisting of a printed circuit board; a metal core printed circuit board; a ceramic circuit board, a thermally conducting ceramic; a low temperature co-fired ceramic; and alumina. ### Claim 19 (depends on 1) The device of claim 1, wherein a minimum distance from the light emitting surface of the at least one light emitting diode to the at least one phosphor material is in a range 0.2 mm to 1 mm. ### Claim 20 (depends on 1) The device of claim 1, wherein the phosphor material is a silicate-based material. ### Claim 21 A white light emitting device comprising: a) a thermally conductive substrate; b) a plurality of light emitting diode mounted in thermal communication with a surface of the substrate and operable to emit excitation light having a dominant wavelength in a first wavelength range; c) a housing attached to the substrate and configured such that the housing and substrate together define a volume that totally encloses the plurality of light emitting diodes, the housing comprising at least a part that is light transmissive; and d) at least one phosphor material provided on an inner surface of the housing within said volume, said phosphor being operable to absorb at least a part of the excitation light and to emit light having a dominant wavelength in a second wavelength range, wherein the emission product of the device comprises light of the first and second wavelength ranges and appears white in color; and wherein the housing is attached to the substrate such that the volume is at least water tight and wherein the emission product intensity of the device is at least 50 lumens. ### Claim 22 (depends on 21) The device according to claim 21, wherein the device has an emission product of intensity selected from the group consisting of: at least 100 lumens; at least 250 lumens; and at least 500 lumens. ### Claim 23 A light emitting device comprising: a) a thermally conductive substrate; b) at least one light emitting diode incorporating a phosphor material mounted in thermal communication with a surface of the substrate; and c) a housing attached to the substrate and configured such that the housing and substrate together define a volume that totally encloses the at least one light emitting diode, the housing comprising at least a part that is light transmissive; and wherein the housing is attached to the substrate such that the volume is at least water tight.