# US 12,007,077 B2 · LED filament and 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 12,007,077 B2 - Document ID: US12007077B2 - Status: Granted - Kind: B2 - Application number: 18/126,000 - Filed: 2023-03-24 - Published: 2023-08-24 - Granted: 2024-06-11 - Earliest claimed: 2014-09-28 - Assignees: Zhejiang Super Lighting Electric Appliance Co., Ltd - Applicants: Zhejiang Super Lighting Electric Appliance Co., Ltd. - Inventors: Tao Jiang; MingBin Wang; Yuexing Li; Zhichao Zhang; Chihshan Yu; Aiming Xiong; Lin Zhou; JunFeng Xu - Web page: https://patentgrep.com/patent/US12007077B2 ## CPC - F21K 9/232: specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb - F21K 9/235: Details of bases or caps, i.e. the parts that connect the light source to a fitting; Arrangement of components within bases or caps (F21K9/238 takes precedence) - F21K 9/238: Arrangement or mounting of circuit elements integrated in the light source - F21V 3/10: characterised by coatings - H05B 45/00: Circuit arrangements for operating light-emitting diodes [LED] - H05B 45/20: Controlling the colour of the light - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10W 90/00: Package configurations - C08G 73/106: {containing silicon} - C08L 79/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors - F21Y 2107/00: Light sources with three-dimensionally disposed light-generating elements - F21Y 2107/20: on convex supports or substrates, e.g. on the outer surface of spheres - F21Y 2107/70: on flexible or deformable supports or substrates, e.g. for changing the light source into a desired form - F21Y 2115/10: Light-emitting diodes [LED] - H10H 20/851: Wavelength conversion means - 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 - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - 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 An LED light bulb is provided. The LED light bulb includes a lamp housing, a bulb base, a stem, first and second conductive supports, a driving circuit, and a flexible LED filament. The flexible filament includes two conductive electrodes, a first LED section, a second LED section, and a conductive section. The first LED section is bent in a first space curved shape. The second LED section is bent in a second space curved shape. The conductive section includes a center point of the flexible LED filament. The flexible LED filament is bent in a third space curved shape comprising the first space curved shape and the second space curved shape. ## Claims ### Claim 1 An LED light bulb, comprising: a lamp housing having a central axis; a bulb base connected to the lamp housing and substantially being coaxial with the lamp housing; a stem disposed in the lamp housing along the central axis of the lamp housing; a first conductive support and a second conductive support disposed in the lamp housing; a driving circuit disposed in the bulb base and electrically connected to the first conductive support, the second conductive support, and the bulb base; and a flexible LED filament disposed in the lamp housing and electrically connected to the first conductive support and the second conductive support, the flexible LED filament comprising: two conductive electrodes, one of the two conductive electrodes disposed on one of two ends of the flexible LED filament and the other one of the two conductive electrode disposed on the other end of the flexible LED filament, and the two conductive electrodes electrically connected to the first conductive support; a first LED section being bent in a first space curved shape and electrically connected to one of the two conductive electrodes; a second LED section being bent in a second space curved shape and electrically connected to the other one of the two conductive electrodes; and a conductive section disposed between the first LED section and the second LED section, the conductive section physically and electrically connected to the first LED section and the second LED section, and the conductive section further electrically connected to the second conductive support, wherein, the conductive section includes a center point of the flexible LED filament, wherein the flexible LED filament is bent in a third space curved shape comprising the first space curved shape and the second space curved shape. ### Claim 2 (depends on 1) The LED light bulb of claim 1, wherein a polarity of the first conductive support and a polarity of the second conductive support are different. ### Claim 3 (depends on 2) The LED light bulb of claim 2, wherein the conductive section is on the central axis of the lamp housing and above the stem. ### Claim 4 (depends on 3) The LED light bulb of claim 3, wherein the two conductive electrodes are at opposite sides of the stem. ### Claim 5 (depends on 4) The LED light bulb of claim 4, further comprising two supporting arms, one of two ends of each of the two supporting arms is connected to the stem and the other end of each of the two supporting arms is respectively connected to the first LED section and the second LED section. ### Claim 6 (depends on 5) The LED light bulb of claim 5, wherein each of the first LED section and the second LED section comprises a plurality of LED chips connected in series and a light conversion layer encapsulating the plurality of LED chips. ### Claim 7 (depends on 6) The LED light bulb of claim 6, wherein the light conversion layer comprises a top layer and a base layer, the plurality of LED chips is disposed on the base layer, and the top layer covers the plurality of LED chips. ### Claim 8 (depends on 7) The LED light bulb of claim 7, wherein the light conversion layer further encapsulates a portion of one of the two conductive electrodes and a portion of the conductive section. ### Claim 9 (depends on 8) The LED light bulb of claim 8, further comprising a Cartesian coordinate system having an x-axis, a y-axis and a z-axis, and the Cartesian coordinate system being oriented for the LED light bulb, wherein the z-axis is the central axis of the lamp housing, and the flexible LED filament has a reverse S-shape contour in the XY plane. ### Claim 10 (depends on 9) The LED light bulb of claim 9, wherein the Z-axis is parallel to the stem, wherein R1 is a diameter of the bulb base, R2 is a maximum diameter of the lamp housing, or a maximum horizontal dimension of the lamp housing in the Y-Z plane, and R3 is a maximum width of the LED filament in the Y-axis direction on the Y-Z plane or the maximum width in the X-axis direction on the X-Z plane, and wherein R1