# US 10,441,809 B2 · Tunable white light source with variable UV component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,441,809 B2 - Document ID: US10441809B2 - Status: Granted - Kind: B2 - Application number: 15/773,565 - Filed: 2016-10-25 - Published: 2018-11-08 - Granted: 2019-10-15 - Earliest claimed: 2015-11-10 - Assignees: Signify Holding B.V. - Applicants: Signify Holding B.V. - Inventors: Ties Van Bommel; Rifat Ata Mustafa Hikmet - Web page: https://patentgrep.com/patent/US10441809B2 ## CPC - A61N 5/0613: {Apparatus adapted for a specific treatment} - F21V 9/02: for simulating daylight (F21V9/04, F21V9/06 take precedence) - H05B 45/20: Controlling the colour of the light - H05B 47/155: Coordinated control of two or more light sources - H10H 20/851: Wavelength conversion means - A61N 2005/0651: {Diodes} - A61N 2005/0661: {ultraviolet} - F21Y 2113/30: {of visible and non-visible spectrum} - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) - 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 - 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 invention provides a lighting system (10) comprising a first light source (100), a second light source (200) and a control system (20) configured to control the first light source (100) and the second light source (200), wherein: —the first light source (100) is configured to provide first light source light (101) comprising: (i) a UV component; and (ii) (iia) a blue component or (iib) a blue component and a yellow component; —the second light source (200) is configured to provide white second light source light (201) having a second light source light correlated color temperature (Tc2); —the lighting system (10) is configured to provide lighting system light (11) comprising one or more of said first light source light (101) and said second light source light (201), with the lighting system light (11) having a controllable correlated color temperature (Tc). ## Claims ### Claim 1 A lighting system comprising a first light source, a second light source and a control system configured to control the first light source and the second light source, wherein: the first light source is configured to provide first light source light comprising: a UV component; and a blue component or a blue component and a yellow component; the second light source is configured to provide white second light source light having a second light source light correlated color temperature; the lighting system is configured to provide lighting system light comprising one or more of said first light source light and said second light source light, wherein the lighting system light has a controllable correlated color temperature and a relatively increased UV content with an increased correlated color temperature, wherein the first light source comprises a UV light source configured to provide UV first light source radiation in a wavelength range of 200-380 nm and a luminescent material configured to convert part of the UV first light source radiation into blue luminescent material light, and wherein the first light source light comprises said blue luminescent material light and said UV first light source radiation, or wherein the first light source comprises a UV light source configured to provide UV first light source radiation in the wavelength range of 200-380 nm and a luminescent material configured to convert part of the UV first light source radiation into blue luminescent material light and configured to convert part of the UV first light source radiation and/or the blue luminescent material light into yellow luminescent material light, and wherein the first light source light comprises said blue luminescent material light, said yellow luminescent material light and said UV first light source radiation. ### Claim 2 (depends on 1) The lighting system according to claim 1, wherein the lighting system is configured to provide lighting system light having a UV content, defined by a percentage of the total power provided in the range of 200-380 nm provided by the lighting system relative to a total power in a range of 200-780 nm provided by the lighting system, in a range of 1-20% (Watt/Watt). ### Claim 3 (depends on 1) The lighting system according to claim 1, wherein the second light source light correlated color temperature is selected from a range of 2000-3500 K. ### Claim 4 (depends on 1) The lighting system according to claim 1, wherein the UV component has a wavelength selected from a range of 280-320 nm. ### Claim 5 (depends on 4) The lighting system according to claim 4, wherein at least 80% of the total power in the wavelength range of 200-400 nm of the lighting system light is in the range of 280-320 nm. ### Claim 6 (depends on 1) The lighting system according to claim 1, wherein the first light source and second light source comprise one or more solid state light sources. ### Claim 7 (depends on 1) The lighting system according to claim 1, wherein the second light source comprises a blue light source configured to provide blue second light source radiation and a luminescent material configured to convert part of the blue second light source radiation into yellow luminescent material light, wherein the white second light source light comprises said blue second light source radiation and said yellow luminescent material light. ### Claim 8 (depends on 1) The lighting system according to claim 1, wherein the second light source comprises an RGB light source. ### Claim 9 (depends on 1) The lighting system according to claim 1, wherein the first light source is configured to provide white first light source light having a first light source light correlated color temperature of at least 300 K higher than the second light source light correlated color temperature. ### Claim 10 (depends on 1) The lighting system according to claim 1, further comprising a third light source configured to provide third light source light having a UV component or a red component. ### Claim 11 (depends on 1) The lighting system according to claim 1, further comprising a light exit window, wherein the lighting system is configured to generate said first light source light and said second light source light upstream from said light exit window and configured to provide said lighting system light downstream from said light exit window. ### Claim 12 (depends on 1) A method of illuminating an indoor space, comprising providing with the lighting system according to claim 1, said lighting system light in said indoor space. ### Claim 13 (depends on 12) The method according to claim 12, comprising providing white lighting system light having a maximum deviation from a black body locus of 15 SDCM.