# US 8,783,937 B2 · LED illumination device with isolated driving circuitry > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,783,937 B2 - Document ID: US8783937B2 - Status: Granted - Kind: B2 - Application number: 13/570,473 - Filed: 2012-08-09 - Published: 2013-02-21 - Granted: 2014-07-22 - Earliest claimed: 2011-08-15 - Assignees: Maxlite, Inc. - Applicants: James Steedly - Inventors: James Steedly - Web page: https://patentgrep.com/patent/US8783937B2 ## CPC - F21V 29/74: with fins or blades - F21K 9/23: Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings - F21V 3/049: {Patterns or structured surfaces for diffusing light, e.g. frosted surfaces} - F21V 23/009: {the casing being inside the housing of the lighting device} - F21V 29/15: Thermal insulation - F21V 29/506: of globes, bowls or cover glasses - F21V 29/773: {the planes containing the fins or blades having the direction of the light emitting axis} - F21Y 2103/33: annular - F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements - F21Y 2115/10: Light-emitting diodes [LED] - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR - 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 The present disclosure generally relates to several embodiments of a new illumination device using a plurality of LEDs, the device is designed to better diffuse heat produced from a heating driver circuitry and the LEDs in a way that allows for either the operating or equilibrium temperatures of the heat sensitive elements as part of the device to be subject to less stringent temperature increases and therefore improve the viability and energy performance of the device. The new design includes toroid-shaped external rings for the plurality of LEDs and a middle opening for the driver circuitry. The new design further includes fins and the use of different spaces and openings within the housing to help control the flow of heat by way of thermal conduction, thermal convection, or thermal irradiation. ## Claims ### Claim 1 A light emitting diode (LED) illumination device comprising: a housing with an external peripheral ring for the support of at least a circuit board and an inner surface, and a power supply cavity defined in the external peripheral ring by the inner surface and at its base by a housing plate having a top surface in the power supply cavity and a bottom surface; a base plug coupled to the bottom surface of the housing plate, the base plug capable of receiving power from a conventional power source and transferring the power through the plug; a power supply driver circuitry coupled to the base plug and connected to the top surface of the housing plate, the power supply driver circuitry having an external edge at a distance from the inner surface of the housing creating a gap; at least a circuit board supported by the external peripheral ring for a plurality of LEDs, wherein the circuit board is connected via wire joints over the gap to the power supply driver circuitry. ### Claim 2 (depends on 1) The device of claim 1, further comprising a plurality of LEDs connected to the circuit board and a diffuser coupled to the housing to shield the plurality of LEDs from the atmosphere. ### Claim 3 (depends on 2) The device of claim 2, wherein the diffuser includes a cap for the passage of air. ### Claim 4 (depends on 3) The device of claim 3, wherein the cap includes a heat sink cap with heat sink fins, and is connected to an upper surface of the driver circuitry. ### Claim 5 (depends on 4) The device of claim 4, wherein the housing further includes a recessed platform with an internal ring with holes for the passage of the wire joints. ### Claim 6 (depends on 2) The device of claim 2, further including an outer reflector adjacent to the plurality of LEDs. ### Claim 7 (depends on 6) The device of claim 6, further including an inner reflector adjacent also adjacent to the plurality of LEDs. ### Claim 8 (depends on 1) The device of claim 1, wherein the housing includes heat transfer fins. ### Claim 9 (depends on 1) The device of claim 1, wherein the at least a circuit board includes two half toroid-shaped circuit boards and each comprises a plurality of LEDs arranged in a ring. ### Claim 10 A light emitting diode (LED) illumination device comprising: a housing with an external peripheral ring for the support of at least a circuit board and an inner surface, and a power supply cavity defined in the external peripheral ring by the inner surface and at its base by a housing plate having a top surface in the power supply cavity and a bottom surface; a base plug coupled to the bottom surface of the housing plate, the base plug capable of receiving power from a conventional power source and transferring the power through the plug; a power supply driver circuitry coupled to the base plug and connected to the top surface of the housing plate, the power supply driver circuitry having an external edge at a distance from the inner surface of the housing creating a gap; and at least a circuit board supported by the external peripheral ring for a plurality of LEDs, wherein an upper surface of the power supply driver circuitry is located above the circuit board. ### Claim 11 (depends on 10) The device of claim 10, further comprising a plurality of LEDs connected to the circuit board, and further comprising a diffuser coupled to the housing to shield the plurality of LEDs from the atmosphere, and wherein the plurality of LEDs receive irradiative heat from at least a portion of the external edge. ### Claim 12 (depends on 11) The device of claim 11, wherein the diffuser includes a cap for the passage of air. ### Claim 13 (depends on 12) The device of claim 12, wherein the cap is a heat sink cap with heat sink fins, and is connected to the upper surface of the driver circuitry. ### Claim 14 (depends on 13) The device of claim 13, wherein the housing further includes a recessed platform with an internal ring. ### Claim 15 (depends on 11) The device of claim 11, further including an outer reflector adjacent to the plurality of LEDs. ### Claim 16 (depends on 15) The device of claim 15, further including an inner reflector adjacent also adjacent to the plurality of LEDs. ### Claim 17 (depends on 10) The device of claim 10, wherein the housing includes heat transfer fins. ### Claim 18 (depends on 10) The device of claim 10, wherein the at least a circuit board includes two half toroid-shaped circuit boards and each comprises a plurality of LEDs arranged in a ring.