# US 2018/0023769 A1 · Lighting device comprising a driver unit and method of manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0023769 A1 - Document ID: US20180023769A1 - Status: Published application - Kind: A1 - Application number: 15/549,588 - Filed: 2016-02-09 - Published: 2018-01-25 - Earliest claimed: 2015-02-12 - Assignees: Philips Lighting Holding B.V. - Applicants: Philips Lighting Holding B.V. - Inventors: Guy Louis Paul DE BONDT; Coen Theorodus Hubertus Fransiscus LIEDENBAUM; Christian HATTRUP; Georg SAUERLÄNDER; Adrianus SEMPEL; Henricus Franciscus BONEKAMP; Theodorus Johannes Petrus VAN DEN BIGGELAAR - Web page: https://patentgrep.com/patent/US20180023769A1 ## CPC - 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 23/023: {Power supplies in a casing (F21V23/003 takes precedence)} - H01F 27/38: Auxiliary core members; Auxiliary coils or windings - H01F 30/10: Single-phase transformers (H01F30/16 takes precedence) - F21V 3/00: Globes; Bowls; Cover glasses (with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506) - F21V 3/061: {the material being glass} - F21V 23/005: {the substrate is supporting also the light source} - F21Y 2115/10: Light-emitting diodes [LED] - 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 - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - 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 lighting device (100) and a method of manufacturing a lighting device, wherein the lighting device comprises at least one light source (110) arranged to generate light. The lighting device further comprises a light-transmissive envelope (120) enclosing the at least one light source and being arranged to transmit the light generated from the light source. The lighting device further comprises a driver unit (130) arranged for electrical supply to the at least one light source, the driver unit comprising a primary driver circuit (140) connectable to an electric energy source, at least one secondary driver circuit (150) connected to the at least one light source, and a transformer (160) arranged to transfer electrical energy between the primary driver circuit and the at least one secondary driver circuit, wherein at least the transformer and the at least one secondary driver circuit driver unit are arranged within the envelope. ## Claims ### Claim 1 A lighting device, comprising at least one light source arranged to generate light, a light-transmissive envelope enclosing said at least one light source and being arranged to transmit the light generated from said at least one light source, and a driver unit arranged for electrical supply to said at least one light source, said driver unit comprising a primary driver circuit connectable to an electric energy source, at least one secondary driver circuit connected to said at least one light source, and a transformer arranged to transfer electrical energy between said primary driver circuit and said at least one secondary driver circuit, characterized in that at least said primary driver circuit, said transformer and said at least one secondary driver circuit of said driver unit are arranged within said envelope. ### Claim 2 (depends on 1) The lighting device according to claim 1, wherein said driver unit is arranged within said envelope. ### Claim 3 (depends on 1) The lighting device according to claim 1, wherein said primary driver circuit is arranged at a base portion of said envelope. ### Claim 4 (depends on 1) The lighting device according to claim 1, further comprising a support structure arranged within said envelope, wherein said at least one secondary driver circuit and said at least one light source are arranged on said support structure. ### Claim 5 (depends on 4) The lighting device according to claim 4, wherein said support structure is cylinder-shaped and at least partially encloses said transformer. ### Claim 6 (depends on 4) The lighting device according to claim 4, wherein said support structure has a polygonal cross section. ### Claim 7 (depends on 1) The lighting device according to claim 1, wherein said transformer comprises a core, a primary winding arranged around said core, an isolating element at least partially enclosing said primary winding, and a secondary winding arranged around said isolating element, wherein said lighting device further comprises a stem element enclosing said core. ### Claim 8 (depends on 7) The lighting device according to claim 7, wherein said stem element further encloses said primary winding. ### Claim 9 (depends on 7) The lighting device according to claim 7, wherein said stem element is cylinder-shaped and extends from a base portion of said envelope into the interior of said envelope. ### Claim 10 (depends on 7) The lighting device according to claim 7, wherein said isolating element and/or said stem element comprises glass. ### Claim 11 (depends on 7) The lighting device according claim 7, wherein said transformer further comprises a first core element shaped as a cylinder and arranged around said secondary winding, and at least one second core element arranged on one of the circumferential rims of said first core element. ### Claim 12 (depends on 1) The lighting device according to claim 1, wherein said envelope is bulb-shaped. ### Claim 13 (depends on 1) The lighting device according to claim 1, wherein said envelope comprises glass. ### Claim 14 (depends on 1) The lighting device according to claim 1, wherein said at least one light source comprises at least one light emitting diode. ### Claim 15 A method of manufacturing a lighting device, comprising the steps of: providing at least one light source arranged to generate light, providing a light-transmissive envelope for enclosing said at least one light source and being arranged to transmit the light generated from said at least one light source, and providing a driver unit arranged for electrical supply to said at least one light source, said driver unit comprising a primary driver circuit connectable to an electric energy source, at least one secondary driver circuit connectable to said at least one light source, and a transformer arranged to transfer electrical energy between said primary driver circuit and said at least one secondary driver circuit, characterized by: arranging at least said primary driver circuit, said transformer and said at least one secondary driver circuit of said driver unit within said envelope.