# US 12,111,047 B2 · Luminaire with stacked UV and visible light sources > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,047 B2 - Document ID: US12111047B2 - Status: Granted - Kind: B2 - Application number: 18/027,536 - Filed: 2021-09-20 - Published: 2024-01-04 - Granted: 2024-10-08 - Earliest claimed: 2020-09-21 - Assignees: Hli Solutions, Inc. - Applicants: HLI Solutions, Inc. - Inventors: Douglas Matthew Hamilton - Web page: https://patentgrep.com/patent/US12111047B2 ## CPC - F21V 33/0064: {Health, life-saving or fire-fighting equipment} - A61L 2/10: Ultraviolet [UV] radiation - A61L 9/20: Ultraviolet radiation - F21V 23/0442: {activated by means of a sensor, e.g. motion or photodetectors} - 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 2209/111: Sensor means, e.g. motion, brightness, scent, contaminant sensors - A61L 2209/12: Lighting means - F21S 8/026: {intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling} - F21Y 2113/10: of different colours - F21Y 2115/10: Light-emitting diodes [LED] - Y02B 20/40: Control techniques providing energy savings, e.g. smart controller or presence detection - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - 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 - 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 luminaire includes a housing with a light exit aperture, wherein the housing houses a first light source which emits visible light and a second light source which emits ultraviolet (UV) light. The second light source is disposed within the housing between the first light source and the light exit aperture and allows at least some of the visible light emitted by the first light source to pass therethrough. ## Claims ### Claim 1 A luminaire comprising: a housing including a light exit aperture defined therein; a first light source disposed in the housing, the first light source configured to emit visible light; and a second light source disposed in the housing between the first light source and the light exit aperture, the second light source configured to emit ultraviolet light, the second light source further configured to allow at least some of the light emitted by the first light source to pass therethrough. ### Claim 2 (depends on 1) The luminaire of claim 1, wherein the visible light emitted by the first light source includes a wavelength that is between 380 nanometers and 740 nanometers. ### Claim 3 (depends on 1) The luminaire of claim 1, wherein the ultraviolet light emitted by the second light source includes a wavelength that is between 10 nanometers and 400 nanometers. ### Claim 4 (depends on 1) The luminaire of claim 1, wherein the wavelength of a majority of the ultraviolet light emitted by the second light source is at least one of (i) between 200 nanometers and 240 nanometers. ### Claim 5 (depends on 1) The luminaire of claim 1, wherein a majority of the light emitted by the first light source passes through the second light source. ### Claim 6 (depends on 1) The luminaire of claim 1, wherein the first light source includes at least one light-emitting diode. ### Claim 7 (depends on 1) The luminaire of claim 1, further comprising means for supporting the luminaire, wherein the luminaire is at least one of a linear light, troffer light, high-bay light, panel light, downlight, cylinder light, step light, pendant light, track light, flood light, streetlamp, and desk lamp. ### Claim 8 (depends on 1) The luminaire of claim 1, wherein the wavelength of a majority of the ultraviolet light emitted by the second light source is between 212 nanometers and 232 nanometers. ### Claim 9 (depends on 1) The luminaire of claim 1, wherein the wavelength of a majority of the ultraviolet light emitted by the second light source is between 217 nanometers and 227 nanometers. ### Claim 10 (depends on 1) The luminaire of claim 1, wherein the wavelength of a majority of the ultraviolet light emitted by the second light source is 222 nanometers. ### Claim 11 (depends on 1) The luminaire of claim 1, wherein the second light source includes an excimer light source. ### Claim 12 (depends on 11) The luminaire of claim 11, wherein the excimer light source includes a krypton-chlorine gas. ### Claim 13 (depends on 1) The luminaire of claim 1, further comprising a central axis extending through the luminaire, the central axis extending through each of the first light source and the second light source. ### Claim 14 (depends on 13) The luminaire of claim 13, wherein the first light source and the second light source are disposed in the housing such that a majority of the first light source and the second light source overlap with each other in a direction along the central axis. ### Claim 15 (depends on 13) The luminaire of claim 13, wherein the central axis extends through a center of each of the first light source and the second light source. ### Claim 16 (depends on 15) The luminaire of claim 15, wherein the central axis further extends through a center of the light exit aperture of the housing. ### Claim 17 A lighting system for illuminating an area, the lighting system comprising: a luminaire including a first light source and a second light source disposed in a housing comprising a light exit aperture, the first light source configured to emit visible light and the second light source configured to emit ultraviolet light, wherein the second light source is disposed in the housing between the first light source and the light exit aperture and configured to allow at least some of the visible light emitted by the first light source to pass through; a sensor configured to detect occupancy of the area; and a controller operatively coupled to the second light source and the sensor, the controller configured to receive one or more signals from the sensor, determine if the area is occupied, and if the area is occupied, illuminate the second light source. ### Claim 18 (depends on 17) The lighting system of claim 17, wherein the controller is configured to turn off the second light source after a predetermined amount of time. ### Claim 19 (depends on 17) The lighting system of claim 17, wherein the first light source is illuminated via a user actuated switch. ### Claim 20 The lighting system 17, wherein the sensor comprises includes one of: (i) a motion sensor, (ii) a temperature sensor, or (iii) an audio sensor. ### Claim 21 (depends on 17) The lighting system of claim 17, wherein the controller is further operatively coupled to the first light source, and the controller is further configured to illuminate the first light source if the area is occupied. ### Claim 22 (depends on 21) The lighting system of claim 21, wherein the controller is further configured to determine if the area is unoccupied for a threshold amount of time after illuminating the first light source, and if the area is unoccupied for the threshold amount of time, turn off the first light source. ### Claim 23 A lighting system for illuminating an area, the lighting system comprising: a luminaire including a first light source and a second light source disposed in a housing comprising a light exit aperture, the first light source configured to emit visible light and the second light source configured to emit ultraviolet light, wherein the second light source is disposed in the housing between the first light source and the light exit aperture and configured to allow at least some of the visible light emitted by the first light source to pass through; a light switch configured to illuminate the first light source; and a controller operatively coupled to the second light source and the light switch, the controller configured to determine the light switch has been engaged, illuminate the second light source, and after a predetermined amount of time, turn off the second light source. ### Claim 24 A lighting system for illuminating an area, the lighting system comprising: a luminaire including a first light source and a second light source disposed in a housing comprising a light exit aperture, the first light source configured to emit visible light and the second light source configured to emit ultraviolet light, wherein the second light source is disposed in the housing between the first light source and the light exit aperture and configured to allow at least some of the visible light emitted by the first light source to pass through; a controller operatively coupled to the second light source, the controller configured to periodically illuminate the second light source regardless of occupancy of the area.