Lighting device with shaped remote phosphor

• US 8,466,611 B2
• Filed: 12/14/2009
• Issued: 06/18/2013
• Est. Priority Date: 12/14/2009
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Negley, Gerald H., Van De Ven, Antony Paul
• Primary Examiner(s): Williams, Joseph L
• Application Number:
  US12/636,958
• Publication Number:
  US 20110140593A1
• Time in Patent Office: 1,282 Days
• Field of Search: 313/502, 313/512, 362/84
• US Class Current: 313/502
• 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: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/32245 the item being metallic
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/181 Encapsulation

Abstract

Solid state lighting (SSL) luminaires are disclosed having remote phosphors arranged to minimize heat degradation and to efficiently convert light. One embodiment of an SSL luminaire includes a light emitting diode (LED) mounted in a base. An enclosure is mounted in relation to the base so that light from the LED emits into the enclosure. A remote phosphor is mounted in the enclosure with at least some light from the LED passing into the remote phosphor where at least some of the light is absorbed and re-emitted at a different wavelength and passing through the enclosure. The remote phosphor is mounted a sufficient distance from the LED so substantially no heat from the LED passes into said conversion material, and wherein the remote phosphor has an open compound shape.

Claims

1. A solid state lighting (SSL) luminaire, comprising:

a solid state light source;

a remote phosphor mounted in relation to said light source so that light from said light source passes through said remote phosphor where at least some of said light source light is converted, said remote phosphor having an open compound shape.

2. The luminaire of claim 1, wherein said remote phosphor comprises a phosphor in a binder.

3. The luminaire of claim 1, wherein said remote phosphor has regions with different concentrations of phosphors.

4. The luminaire of claim 1, wherein said remote phosphor comprises more than one type of phosphor.

5. The luminaire of claim 1, wherein said remote phosphor comprises different phosphors in different regions.

6. The luminaire of claim 1, further comprising a base and an enclosure.

7. The luminaire of claim 1, wherein said remote phosphor has no surfaces that face each other.

8. The luminaire of claim 1, wherein said remote phosphor has a hyperbolic paraboloid shape.

9. The luminaire of claim 1, wherein the remote phosphor has different thicknesses.

10. The luminaire of claim 1, wherein said remote phosphor is substantially planar and has curves or bends.

11. The luminaire of claim 1, emitting a white light combination from said light source and said remote phosphor.

28. The luminaire of claim 1, wherein said remote phosphor is and mounted a sufficient distance from said light source so that substantially no heat from said light source passes into said remote phosphor.

12. A lamp, comprising:

a light emitting diode (LED); and

a remote conversion material mounted in relation to said LED so that light from said LED passes through said conversion material where at least some of said LED light is absorbed and re-emitted at a different wavelength, and conversion material mounted a sufficient distance from said LED so that heat from said LED does not pass into said conversion material, wherein said conversion material has angled surfaces in a shape that minimizes re-emitted light passing into said conversion material.

13. The lamp according to claim 12, wherein said remote conversion material is fixed in a binder.

14. The lamp according to claim 12, wherein said conversion material is in a compound and open shape.

15. The lamp according to claim 12, wherein said conversion material is in a hyperbolic paraboloid shape.

16. The lamp of claim 12, wherein said remote phosphor has no surfaces that face each other.

17. A solid state lighting (SSL) luminaire, comprising:

a solid state light source mounted in a base;

an enclosure mounted in relation to said base so that light from said light source emits into said enclosure; and

a remote phosphor mounted in said enclosure with at least some light from said light source passes into said remote phosphor where at least some of said light is absorbed and re-emitted at a different wavelength, said remote phosphor mounted a sufficient distance from said light source so substantially no heat from said light source passes into said remote phosphor, wherein said remote phosphor has a shape that minimizes re-emitted light passing back into said conversion material.

18. The luminaire of claim 17, wherein said enclosure is mounted to said base.

19. The luminaire of claim 17, wherein said base can be mounted to a standard light bulb socket.

20. The luminaire of claim 17, wherein said base comprises a power converter.

21. The luminaire of claim 17, wherein said light source comprises a light emitting diode (LED).

22. The luminaire of claim 17, wherein said remote phosphor comprises a conversion material fixed in a binder.

23. The luminaire of claim 17, wherein said remote phosphor has a compound and open shape.

24. The luminaire of claim 17, wherein said conversion material has a hyperbolic paraboloid shape.

25. A solid state lighting (SSL) luminaire, comprising:

a light emitting diode (LED) mounted in a base;

an enclosure mounted in relation to said base so that light from said LED emits into said enclosure; and

a remote phosphor mounted in said enclosure with at least some light from said LED passes into said remote phosphor where at least some of said light is absorbed and re-emitted at a different wavelength and passes through said enclosure, wherein said remote phosphor has an open compound shape.

26. The luminaire of claim 25, wherein said remote phosphor has a shape that minimizes re-emitted light passing back into said remote phosphor.

27. The luminaire of claim 25, wherein said remote phosphor is mounted a sufficient distance from said LED so that substantially no heat from said LED passes into said remote phosphor.