# US 12,181,112 B2 · Beam shaping for spiral LED filament systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,181,112 B2 - Document ID: US12181112B2 - Status: Granted - Kind: B2 - Application number: 17/778,838 - Filed: 2020-11-12 - Published: 2022-12-29 - Granted: 2024-12-31 - Earliest claimed: 2019-11-21 - Assignees: Signify Holding B.V. - Applicants: Signify Holding B.V. - Inventors: Ties Van Bommel; Rifat Ata Mustafa Hikmet - Web page: https://patentgrep.com/patent/US12181112B2 ## CPC - F21K 9/232: specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb - H10W 90/00: Package configurations - F21V 23/04: the elements being switches (safety devices F21V25/00) - H05B 45/10: Controlling the intensity of the light - H05B 45/20: Controlling the colour of the light - F21Y 2103/10: comprising a linear array of point-like light-generating elements - 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 - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - 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 - 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 relates to a light-emitting diode, LED, filament system (770) comprising a LED filament (100) and a controller (771). The LED filament comprises a carrier (120) arranged in the shape of a spiral formed by successive loops (250). The LED filament further comprises a plurality of LEDs (110) arranged in a linear array on one side of the carrier. The LEDs are arranged along the carrier in sections (140a-f), each section having a position along the spiral-shaped carrier. The controller is configured to control a power supply to a section, or to a group of sections, of the LED filament. The controller is adapted to control a section based on its position, or a group of sections based on the positions of the sections of said group. ## Claims ### Claim 1 A light-emitting diode (LED) filament system comprising: a LED filament comprising: a carrier arranged in the shape of a spiral formed by successive loops; a plurality of LEDs arranged in a linear array on one side of said carrier; wherein said LEDs are arranged along the carrier in sections, each section has a position along the spiral-shaped carrier, wherein the LEDs are arranged in a single linear array on the one side of the carrier, and each section includes a respective entire predetermined length of the carrier that includes two or more LEDs; and a controller configured to control a power supply to a section, or to a group of sections, of the LED filament; wherein said controller is adapted to control a section or a group of sections using the position or positions of the section or group, wherein the position or positions are determined using a height and an angle of said section or group along the spiral-shaped carrier, wherein said height is a distance from an end portion of the LED filament to the section along a central axis (A) of the spiral shape, and said angle is the position of the section along a loop relative to a starting point of the loop, and wherein each loop of the LED filament comprises N sections, and wherein N borders between said N sections of a loop are vertically aligned with N borders between N sections of a successive loop, along the height of the spiral-shaped carrier. ### Claim 2 (depends on 1) The LED filament system of claim 1, wherein LEDs of a section are controllable by said controller to emit light with a variable intensity. ### Claim 3 (depends on 1) The LED filament system of claim 1, wherein LEDs of a section are controllable by said controller to emit light with variable color. ### Claim 4 (depends on 1) The LED filament system of claim 1, wherein said number N of each section of each loop of the spiral is in a range of 2-8. ### Claim 5 (depends on 1) The LED filament system of claim 1, wherein said sections comprise at least a first set of sections and a second set of sections, wherein sections of said first set and sections of said second set are arranged along the carrier in a repetitive manner. ### Claim 6 (depends on 1) The LED filament system of claim 1, wherein a radius of each of the loops of the spiral varies or is constant along the height of the spiral. ### Claim 7 (depends on 6) The LED filament system of claim 6, wherein the radius of each of the loops of the spiral varies along the height of the spiral, wherein a length of a section in a loop having a smaller radius is shorter than a length of a section in a loop having a larger radius. ### Claim 8 (depends on 1) The LED filament system of claim 1, wherein each section comprises at least two LEDs. ### Claim 9 (depends on 1) The LED filament of claim 1, wherein the LEDs of a section are electrically connected in series. ### Claim 10 (depends on 1) The LED filament system of claim 1, wherein said controller is configured to control a power supply to a first section, or to a first group of sections, differently than a power supply to a second section, or to a second group of sections. ### Claim 11 (depends on 1) The LED filament system of claim 1, wherein said controller is configured to control the powering of the sections, or the groups of sections, of the LED filament such that a luminous flux of the LED filament is substantially constant over time. ### Claim 12 (depends on 1) The LED filament system of claim 1, wherein said controller is configured to control the powering of the sections, or the groups of sections, of the LED filament based on a desired direction of light-emission, such that sections which emit light in a desired direction are turned on, and other sections are turned off. ### Claim 13 (depends on 1) A lighting device comprising: a LED filament system as defined by claim 1; an at least partially light-transmissive envelope, at least partially enveloping at least the LED filament of the LED filament system; a base on which said envelope is mounted, said base being adapted for connection with a luminaire socket. ### Claim 14 (depends on 1) The LED filament system of claim 1, wherein the one side of the carrier on which the LEDs are arranged is a continuous widthwise surface, lacking any openings. ### Claim 15 A light-emitting diode (LED) filament system comprising: a LED filament comprising: a carrier arranged in the shape of a spiral formed by successive loops; a plurality of LEDs arranged in a linear array on one side of said carrier; wherein said LEDs are arranged along the carrier in sections, each section has a position along the spiral-shaped carrier, wherein the LEDs are arranged in a single linear array on the one side of the carrier, and each section includes a respective entire predetermined length of the carrier that includes two or more LEDs; and a controller configured to control a power supply to a section, or to a group of sections, of the LED filament; wherein said controller is adapted to control one or more sections using a section's height and an angle of its position along the spiral-shaped carrier; wherein said height is a distance from an end portion of the LED filament to the section along a central axis (A) of the spiral shape, and said angle is the position of the section along a loop relative to a starting point of the loop, and wherein each loop of the LED filament comprises N sections, and wherein N borders between said N sections of a loop are vertically aligned with N borders between N sections of a successive loop, along the height of the spiral-shaped carrier.