# US 2010/0134047 A1 · Modular LED Light Bulb > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0134047 A1 - Document ID: US20100134047A1 - Status: Published application - Kind: A1 - Application number: 12/467,191 - Filed: 2009-05-15 - Published: 2010-06-03 - Earliest claimed: 2009-05-15 - Assignees: Bridgelux, Inc. - Inventors: Ghulam Hasnain - Web page: https://patentgrep.com/patent/US20100134047A1 ## CPC - F21V 23/0442: {activated by means of a sensor, e.g. motion or photodetectors} - F21K 9/232: specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb - F21K 9/238: Arrangement or mounting of circuit elements integrated in the light source - F21K 9/64: using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer - F21V 3/12: the coatings comprising photoluminescent substances - F21V 17/002: {with provision for interchangeability, i.e. component parts being especially adapted to be replaced by another part with the same or a different function (F21V17/10 takes precedence)} - F21V 23/005: {the substrate is supporting also the light source} - F21V 23/0457: {the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device} - F21V 29/74: with fins or blades - F21V 29/90: Heating arrangements - H05B 45/00: Circuit arrangements for operating light-emitting diodes [LED] - H05B 45/22: using optical feedback - F21V 17/164: {the parts being subjected to bending, e.g. snap joints} - F21V 29/85: characterised by the material (liquid coolants F21V29/56) - F21Y 2115/10: Light-emitting diodes [LED] - H10W 72/884: {Die-attach connectors and bond wires} - H10W 74/00: Encapsulations, e.g. protective coatings - H10W 90/753: {between laterally-adjacent chips} - 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 - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - 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 An LED-based lighting device and method for making the same are disclosed. The lighting device includes an LED light source mounted on a heat sink, a power adaptor, and a controller. The power adaptor is configured to be interchangeable with a conventional incandescent bulb power adapter. The controller provides an average current to the LED light source when power is coupled to the device via the power adaptor. The average current causes the LED light source to generate light of a predetermined standard intensity that is substantially independent of variations in the LED light source from device to device. In one aspect of the invention, the LED light source includes a plurality of LEDs connected in series, the LEDs are bonded to the heat sink and connected to one another in series by wire bonds and to conducting traces on the heat sink. ## Claims ### Claim 1 An apparatus comprising: a heat sink; an LED light source mounted on said heat sink; a power adaptor configured to be interchangeable with a conventional bulb power adapter; and a controller that provides an average current to said LED light source when power is coupled to said apparatus via said power adaptor, said average current causing said LED light source to generate light of a predetermined standard intensity that is substantially independent of variations in said LED light source from apparatus to apparatus. ### Claim 2 (depends on 1) The apparatus of claim 1 wherein said conventional bulb power adapter comprises a threaded base adapted to screw into a light socket. ### Claim 3 (depends on 1) The apparatus of claim 1 wherein said conventional bulb power adapter comprises a bayonet adapter. ### Claim 4 (depends on 1) The apparatus of claim 1 wherein said conventional bulb power adapter comprises an incandescent bulb adapter. ### Claim 5 (depends on 1) The apparatus of claim 1 wherein said conventional bulb power adapter comprises a fluorescent bulb adapter. ### Claim 6 (depends on 1) The apparatus of claim 1 wherein said LED light source comprises a plurality of LEDs connected in series, said LEDs being bonded to said heat sink and connected to one another in series by wire bonds. ### Claim 7 (depends on 1) The apparatus of claim 1 wherein said LED light source comprises an LED and a layer of phosphor that converts light from said LED to light of a different wavelength. ### Claim 8 (depends on 6) The apparatus of claim 6 wherein two of said LEDs are connected to conducting traces on said heat sink. ### Claim 9 (depends on 1) The apparatus of claim 1 wherein said controller comprises an integrated circuit mounted on said heat sink. ### Claim 10 (depends on 1) The apparatus of claim 1 further comprising an AC to DC converter that converts an AC voltage coupled to said power adapter to a DC power source that powers said controller. ### Claim 11 (depends on 1) The apparatus of claim 1 further comprising a first half-wave rectifier that converts an AC voltage coupled to said power adapter to a first half-wave rectified power source having a duty cycle that provides said predetermined light intensity when said first half-wave rectified power source is used to power said light source. ### Claim 12 (depends on 11) The apparatus of claim 11 wherein said first half-wave rectifier comprises a silicon-controlled rectifier having a control signal chosen to provide said predetermined light intensity, said control signal having a value that depends on a measured value of said light from said LED light source when said light source is operated on said heat sink. ### Claim 13 (depends on 11) The apparatus of claim 11 wherein said LED light source comprises first and second LEDs and wherein said first LED is powered by said first half-wave rectifier and said second LED is powered by a second half-wave rectifier having an output that is 180 degrees out of phase with said first half-wave rectified power source. ### Claim 14 (depends on 1) The apparatus of claim 1 wherein said heat sink is adapted for receiving a light diffusing element that diffuses and redirects light from said light source. ### Claim 15 (depends on 14) The apparatus of claim 14 further comprising a photodetector that measures an intensity of light in said diffusing element, said controller utilizing said measured light intensity to maintain said predetermined standard intensity. ### Claim 16 (depends on 1) The apparatus of claim 1 further comprising a globe that covers said LED light source, said globe comprising a layer of phosphor on a surface thereof. ### Claim 17 (depends on 16) The apparatus of claim 16 wherein said globe comprises a transparent shell and wherein said phosphor is deposited on a surface of said transparent shell. ### Claim 18 (depends on 16) The apparatus of claim 16 wherein said globe comprises an adapter for reversibly attaching said globe to said light source. ### Claim 19 (depends on 16) The apparatus of claim 16 wherein said globe comprises a transparent shell comprising a plastic and wherein said phosphor is an organic phosphor dissolved in said plastic. ### Claim 20 A method for providing a base element for use in constructing LED-based lighting devices, said method comprising: providing a base element comprising a heat sink; an LED light source mounted on said heat sink; a power adaptor configured to be interchangeable with a conventional incandescent bulb power adapter; and a controller that provides an average current to said LED light source when power is coupled to said apparatus via said power adaptor, said average current causing said LED light source to generate light; causing said controller to vary said average current through said LED light source while measuring an intensity of light generated by said LED light source until a predetermined intensity of light is measured; and storing information specifying said average current that caused said LED light source to generate said predetermined intensity of light, wherein said controller provides said average current to said LED light source when power is coupled to said power adaptor. ### Claim 21 (depends on 20) The method of claim 20 wherein said controller comprises an SCR and said information specifies a control signal for said SCR. ### Claim 22 A lighting system comprising a base unit and a first detachable globe, said base unit comprising: a heat sink; an LED light source mounted on said heat sink, said LED light source generating light characterized by a first spectrum; and a power adaptor configured to be interchangeable with a conventional bulb power adapter, wherein said first detachable globe comprises a transparent shell having a first phosphor composition on or contained in said shell and an adapter for attaching said first detachable globe to said base unit, said phosphor composition converting a portion of said light from said LED light source to light having a second spectrum that is different from said first spectrum. ### Claim 23 (depends on 22) The lighting system of claim 22 further comprising a controller that provides an average current to said LED light source when power is coupled to said apparatus via said power adaptor, said average current causing said LED light source to generate light of a predetermined standard intensity that is substantially independent of variations in said LED light source from apparatus to apparatus. ### Claim 24 (depends on 22) The system of claim 22 wherein said first detachable globe comprises a plastic and wherein said first phosphor composition comprises an organic phosphor dissolved in said plastic. ### Claim 25 (depends on 22) The system of claim 22 further comprising a second detachable globe having a second phosphor composition.