Tunable white light source with variable UV component

Patent metadata

Field	Value
Publication number	US-10441809-B2
Application number	US-201615773565-A
Country	US
Kind code	B2
Filing date	Oct 25, 2016
Priority date	Nov 10, 2015
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

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).

First claim

The invention claimed is:

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.

2. 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).

3. 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.

4. The lighting system according to claim 1 , wherein the UV component has a wavelength selected from a range of 280-320 nm.

5. 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.

6. The lighting system according to claim 1 , wherein the first light source and second light source comprise one or more solid state light sources.

7. 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.

8. The lighting system according to claim 1 , wherein the second light source comprises an RGB light source.

9. 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.

10. 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.

11. 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.

12. 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.

13. The method according to claim 12 , comprising providing white lighting system light having a maximum deviation from a black body locus of 15 SDCM.

Assignees

• Signify Holding Bv

Inventors

• Van Bommel Ties
• Hikmet Rifat Ata Mustafa

Classifications

• H05B45/20

  Controlling the colour of the light · CPC title

• A61N5/0613 Primary

  Apparatus adapted for a specific treatment · CPC title

• F21V9/02

  for simulating daylight (F21V9/04, F21V9/06 take precedence) · CPC title

• A61N2005/0651

  Diodes · CPC title

• A61N2005/0661

  ultraviolet · CPC title