# US 2021/0330836 A1 · Led light fixture with germicidal effect > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0330836 A1 - Document ID: US20210330836A1 - Status: Published application - Kind: A1 - Application number: 17/240,791 - Filed: 2021-04-26 - Published: 2021-10-28 - Earliest claimed: 2020-04-25 - Assignees: Manaflex, LLC - Applicants: Manaflex, LLC - Inventors: Robert Clinton Lane - Web page: https://patentgrep.com/patent/US20210330836A1 ## CPC - A61L 2/10: Ultraviolet [UV] radiation - A61L 2/18: Liquid substances - A61L 2/22: Phase substances, e.g. smokes or aerosols - A61L 2/24: Apparatus using programmed or automatic operation - A61L 9/14: using sprayed or atomised substances {including air-liquid contact processes} - A61L 9/20: Ultraviolet radiation - F21S 4/28: rigid, e.g. LED bars - F21V 21/005: for several lighting devices in an end-to-end arrangement, i.e. light tracks - F21V 29/59: {with forced flow of the coolant} - F21V 29/67: characterised by the arrangement of fans - F21V 33/0064: {Health, life-saving or fire-fighting equipment} - A61L 2103/05: Living organisms or biological materials - A61L 2103/75: Room floors or walls - A61L 2202/11: Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps - A61L 2202/14: Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs - A61L 2209/12: Lighting means - F21V 15/015: Devices for covering joints between adjacent lighting devices; End coverings - F21V 23/003: {the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array} - F21V 23/06: the elements being coupling devices {, e.g. connectors} - F21V 29/74: with fins or blades - F21W 2131/20: Lighting for medical use - F21Y 2103/10: comprising a linear array of point-like light-generating elements - F21Y 2113/30: {of visible and non-visible spectrum} - F21Y 2115/10: Light-emitting diodes [LED] - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS - 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 LED light fixture having a mixture of red and white LEDs, as well as any combinations of UVA, UVB, UVC LEDs. The ratio of outputs from these LEDs may be adjusted to achieve a desired germicidal effect. The light fixture is liquid-cooled using a cooling tube that directly cools the power supply and the LED flexible printed circuit. ## Claims ### Claim 1 A LED (light-emitting diode) light fixture comprising: a LED flexible printed circuit, wherein said LED flexible printed circuit has a first array of high-power white LEDs to produce a first output of light; the LED flexible printed circuit having a second array of red LEDs to produce a second output of light; the LED flexible printed circuit having a third array of UV LEDs to produce a third output of light; wherein the third array of UV LEDs includes at least one of UVA LEDs, UVB LEDs, and UVC LEDs. ### Claim 2 (depends on 1) The LED light fixture as recited in claim 1, wherein the third output of light is about 5% of a total output of light. ### Claim 3 (depends on 1) The LED light fixture as recited in claim 1, wherein the third output of light is between 2% and 8% of a total output of light. ### Claim 4 (depends on 2) The LED light fixture as recited in claim 2 wherein an output of light of UVA LEDs and UVB combined is about 5% of the third output of light. ### Claim 5 (depends on 4) The LED light fixture as recited in claim 4 wherein said total output of light is defined as a luminous power flux. ### Claim 6 (depends on 1) The LED light fixture as recited in claim 1, wherein a ratio of said first output of light:said second output of light:said third output of light is user-adjustable to achieve a germicidal effect. ### Claim 7 (depends on 1) The LED light fixture as recited in claim 1, wherein based on an information received about an environment, the LED light fixture automatically adjusts at least one of the following: a) a ratio of said first output of light:said second output of light:said third output of light; b) a time schedule to turn on and off the LEDs; c) a spraying schedule. ### Claim 8 (depends on 1) The LED light fixture as recited in claim 1, wherein said LED light fixture comprises a liquid cooling assembly capable of containing a liquid, wherein the LED flexible printed circuit is coupled to the liquid cooling assembly. ### Claim 9 (depends on 8) The LED light fixture as recited in claim 8 wherein the LED flexible printed circuit is directly attached to the liquid cooling assembly. ### Claim 10 (depends on 9) The LED light fixture as recited in claim 9 further comprising a power supply disposed on the liquid cooling assembly, opposite to said first, second, and third arrays. ### Claim 11 (depends on 10) The LED light fixture as recited in claim 10, wherein LED flexible printed circuit has a portion that wraps around to a top side of the liquid cooling assembly, said portion having at least one pin to electrically connect to a contact of the power supply. ### Claim 12 (depends on 8) The LED light fixture as recited in claim 8, further comprising a second liked LED flexible printed circuit coupled to the liquid cooling assembly. ### Claim 13 (depends on 8) The LED light fixture as recited in claim 8 further comprising at least one nozzle fluidly connected to the liquid cooling assembly to spray said liquid. ### Claim 14 (depends on 13) The LED light fixture as recited in claim 13, wherein said liquid is a disinfectant. ### Claim 15 (depends on 8) The LED light fixture as recited in claim 8 further comprising at least one radiator fluidly connected to the liquid cooling assembly via a tube, wherein the at least one radiator is physically located away from the LED light fixture, and the at least one radiator is located: A) indoor, B) outdoor, or C) both. ### Claim 16 (depends on 1) The LED light fixture as recited in claim 1 further comprising at least one electric fan coupled to a solid-to-air heat exchanger having fins, said electric fan drives an air flow, and wherein the LED flexible printed circuit is coupled to the solid-to-air heat exchanger. ### Claim 17 A method to sterilize surfaces and aerosols indoors for viruses, bacteria, or mold, the method comprising: activating a first array of high-power white LEDs in a LED light fixture to produce an output of light; activating a second array of red LEDs in the LED light fixture to produce an output of light; activating a third array of LEDs in the LED light fixture to produce an output of light, wherein the third array of LEDs having at least one of UVA LEDs, UVB LEDs, and UVC LEDs; wherein said first array, second array, and third array are disposed on a LED flexible printed circuit; adjusting a ratio of outputs of said first array:said output of said second array:said output of third array, to achieve a total output of light, which is defined as a luminous power flux. ### Claim 18 (depends on 17) The method as recited in claim 17, wherein the output of light of the third array of LEDs is about 5% of the total output of light. ### Claim 19 (depends on 18) The method as recited in claim 18, wherein an output of light of UVA LEDs and UVB LEDs combined is about 5% of the output of light of the third array of LEDs. ### Claim 20 (depends on 17) The method as recited in claim 17, cooling the LED light fixture by flowing a liquid through a cooling assembly which directly or directly makes physically contact with the LED flexible printed circuit.