# US 2019/0174602 A1 · Light fixture with at least one LED > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0174602 A1 - Document ID: US20190174602A1 - Status: Published application - Kind: A1 - Application number: 16/092,902 - Filed: 2017-04-07 - Published: 2019-06-06 - Earliest claimed: 2016-04-14 - Assignees: Ledvance GmbH - Applicants: LEDVANCE GmbH - Inventors: Tony ALBRECHT; Markus HOFMANN - Web page: https://patentgrep.com/patent/US20190174602A1 ## CPC - H05B 35/00: Electric light sources using a combination of different types of light generation - F21K 9/232: specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb - H05B 45/00: Circuit arrangements for operating light-emitting diodes [LED] - F21Y 2113/20: of different form - F21Y 2115/10: Light-emitting diodes [LED] - Y02B 20/30: Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED] - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - 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 - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract A light fixture having at least one LED and at least one filament, wherein the at least one filament is connected in series to the at least one LED. A current supplied to the at least one LED in the light fixture is regulated by the electrical properties of the at least one filament. Thus the at least one LED in the light fixture can be run without an electrical driver. ## Claims ### Claim 1 A light fixture comprising: at east one LED; and at least one filament wherein the at least one filament is connected in series to the at least one LED. ### Claim 2 (depends on 1) The light fixture of claim 1, wherein the light fixture comprises a glass bulb and the at least one filament is arranged within the glass bulb, wherein the glass bulb is filled with a protective. ### Claim 3 (depends on 1) The light fixture of claim 1, wherein the light fixture comprises a glass bulb and the at least one filament is arranged within the glass bulb, wherein the glass bulb is filled with a gas comprising at least one halogen. ### Claim 4 (depends on 1) The light fixture of claim 1, wherein the light fixture has a first connector and a second connector for coupling to a supply voltage. ### Claim 5 (depends on 4) The light fixture of claim 4, wherein the light fixture comprises at least one first LED and a second LED which are connected to one another in an antiparallel arrangement. ### Claim 6 (depends on 4) The light fixture of claim 4, wherein the light fixture comprises a rectifier which is coupled to the first connector and the second connector. ### Claim 7 (depends on 1) The light fixture of claim 1, wherein the light fixture comprises at least one first LED and one second LED which are connected to one another in parallel. ### Claim 8 (depends on 1) The light fixture of claim 1, wherein the light fixture comprises at least one first LED and one second LED which are connected to one another in series. ### Claim 9 (depends on 7) The light fixture of claim 7, wherein the at least one first LED and the one second LED have a different forward voltage. ### Claim 10 (depends on 1) The light fixture of claim 1, wherein between 15% and 30% of a voltage drop across the at least one LED and the at least one filament occurs on the at least one LED. ### Claim 11 (depends on 1) The light fixture of claim 1, wherein between 20% and 25% of a voltage drop across the at least one LED and the at least on filament occurs on the at least one LED. ### Claim 12 (depends on 1) The light fixture of claim 1, wherein the light fixture comprises a glass bulb, and a thermal shield, wherein the at least one LED and the at least one filament are arranged in the glass bulb, wherein the thermal shield is arranged between the at least one LED and the at least one filament. ### Claim 13 (depends on 1) The light fixture of claim 1, wherein the at least one LED and the at least one filament generate an optical performance, wherein between 70% and 90% of the optical performance is generated by the at least one LED. ### Claim 14 (depends on 1) The light fixture of claim 1, wherein the at least one LED and the at least one filament generate an optical performance, wherein between 75% and 85% of the optical performance is generated by the at least one LED. ### Claim 15 (depends on 1) The light fixture of claim 1, wherein the at least one LED and the at least one filament generate an optical performance, wherein 80% of the optical performance is generated by the at least one LED. ### Claim 16 (depends on 3) The light fixture of claim 3, wherein the gas is comprised of bromine. ### Claim 17 (depends on 4) The light fixture of claim 4, wherein the supply voltage has an alternating current. ### Claim 18 (depends on 1) The light fixture of claim 1, wherein the light fixture comprises a glass bulb and the at least one filament is arranged within the glass bulb, wherein the glass bulb is filled with a protective gas which comprises a mixture of 93% argon and 7% nitrogen.