Remote light wavelength conversion device and associated methods

• US 8,616,715 B2
• Filed: 01/18/2013
• Issued: 12/31/2013
• Est. Priority Date: 09/16/2011
• Status: Expired due to Fees

• Current Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Original Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Inventors: Bretschneider, Eric, Maxik, Fredric S., Soler, Robert R., Bartine, David E.
• Primary Examiner(s): Truong, Bao Q
• Application Number:
  US13/745,244
• Publication Number:
  US 20130194821A1
• Time in Patent Office: 347 Days
• Field of Search: 362/84, 362551-582
• US Class Current: 362/84
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21V 2200/13 the light being emitted at the end of the guide
• CPC Class Codes: F21V 9/30 Elements containing photoluminescent material distinct from or spaced from the light source shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40

Abstract

A remote light wavelength conversion device is provided for converting a source light emitted from a light source within a source wavelength range into a converted light within a converted wavelength range. The remote light wavelength conversion device may include a waveguide and a color conversion optic. The waveguide may include a first end and a second end and the color conversion optic may be adjacently located at the second end of the waveguide. The color conversion optic may convert the source light transmitted through the waveguide to the converted light. The waveguide may be a fiber having a core diameter of less than about ten micrometers.

Claims

1. A remote light wavelength conversion device for converting a source light emitted from a light source within a source wavelength range into a converted light within a converted wavelength range, the remote light wavelength conversion device comprising:

a waveguide including a first end and a second end opposite the first end; and

a conversion material to convert the source light transmitted through the waveguide to the converted light at the second end;

wherein the source light is transmitted from the first end of the waveguide to the second end of the waveguide;

wherein the conversion material is applied to the second end to form a conversion coating;

wherein the conversion coating includes a plurality of conversion coatings, each one of the plurality of conversion coatings corresponds to a desired output color;

and wherein the plurality of conversion coatings is selectable to convert the source light into the converted light with the desired output color defined by a chromaticity; and

wherein the waveguide is a fiber having a core diameter of less than about ten micrometers.

2. A device according to claim 1 wherein the color conversion optic includes a conversion material selected from a group consisting of phosphors, quantum dots, luminescent materials, and fluorescent materials.

3. A device according to claim 1 wherein the conversion material is located approximately at the second end of the waveguide.

4. A device according to claim 1 wherein the converted wavelength range affects melatonin production.

5. A device according to claim 1 wherein the conversion material is applied to the second end to form a conversion coating;

wherein the conversion coating includes a plurality of conversion coatings, each one of the plurality of conversion coatings corresponds to a desired output color; and

wherein the plurality of conversion coatings is selectable to convert the source light into the converted light with the desired output color defined by the converted wavelength range.

6. A device according to claim 1 wherein the source light is monochromatic.

7. A device according to claim 1 wherein the source light includes high energy light defined within the source wavelength range between 200 and 500 nanometers.

8. A device according to claim 7 wherein at least part of the high energy light included in the source light is converted to low energy light to be included in the converted light.

9. A device according to claim 1 wherein the source light includes low energy light defined within the source wavelength range between 500 and 1300 nanometers.

10. A device according to claim 9 wherein at least part of the low energy light included in the source light is converted to high energy light to be included in the converted light.

11. A device according to claim 9 wherein the source light further includes high energy light defined within the source wavelength range between 200 and 500 nanometers.

12. A device according to claim 1 wherein an optical fixture is adjacently located to the second end of the waveguide to provide a light distribution pattern.

13. A device according to claim 1 wherein the light source is a light emitting semiconductor.

14. A method for operating a remote light wavelength conversion device comprising a waveguide configured to transmit a narrow wavelength range and having reduced light leak, the waveguide being a fiber having a core diameter of less than about ten micrometers and including a first end and a second end opposite the first end, and a color conversion optic comprising a plurality of quantum dots to convert source light transmitted through the waveguide, the method comprising:

receiving the source light emitted from a light source within a source wavelength range at the first end of the waveguide;

transmitting the source light from the first end of the waveguide to the second end of the waveguide; and

converting the source light within the source wavelength range into the converted light within a converted wavelength range using the color conversion optic.

15. A device according to claim 14 wherein the color conversion optic includes a conversion material selected from a group consisting of phosphors, quantum dots, luminescent materials, and fluorescent materials.

16. A method according to claim 14 further including affecting melatonin production.

17. A method according to claim 14 wherein the color conversion optic includes a plurality of interchangeable color conversion optics, each one of the plurality of interchangeable color conversion optics corresponds to a desired output color;

and wherein the plurality of interchangeable color conversion optics is selectable to convert the source light into the converted light with the desired output color defined by the converted wavelength range.

18. A method according to claim 14 wherein the color conversion optic includes a plurality of interchangeable color conversion optics, each one of the plurality of interchangeable color conversion optics corresponds to a desired output color;

and wherein the plurality of interchangeable color conversion optics is selectable to convert the source light into the converted light with the desired output color defined by a chromaticity.

19. A method according to claim 14 wherein the source light is monochromatic.

20. A method according to claim 14 wherein the source light includes high energy light defined within the source wavelength range between 200 and 500 nanometers.

21. A method according to claim 20 further including converting at least part of the high energy light included in the source light to low energy light to be included in the converted light.

22. A method according to claim 14 wherein the source light includes low energy light defined within the source wavelength range between 500 and 1300 nanometers.

23. A method according to claim 22 further including converting at least part of the low energy light included in the source light to high energy light to be included in the converted light.

24. A method according to claim 22 wherein the source light further includes high energy light defined within the source wavelength range between 200 and 500 nanometers.

25. A method according to claim 14 further including providing a light distribution pattern via optical fixtures adjacently located to the second end of the waveguide.

26. A method according to claim 14 wherein the light source is a light emitting semiconductor.