Solid state lighting devices having remote luminescent material-containing element, and lighting methods

• US 9,493,107 B2
• Filed: 11/09/2012
• Issued: 11/15/2016
• Est. Priority Date: 05/13/2009
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Pickard, Paul Kenneth
• Primary Examiner(s): Husar, Stephen F
• Assistant Examiner(s): Allen, Danielle
• Application Number:
  US13/672,941
• Publication Number:
  US 20130063924A1
• Time in Patent Office: 1,467 Days
• Field of Search: 362/311.01, 362/294, 362/457, 362/373, 362/276, 362/802, 362/800
• US Class Current: 1/1
• CPC Class Codes: B60Q 1/0052 concentric
• CPC Class Codes: B60Q 1/0058 Stacked, i.e. one lamp located behind the other in the optical axis direction
• CPC Class Codes: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: F21V 7/26 the material comprising photoluminescent substances
• CPC Class Codes: F21V 7/30 the coatings comprising photoluminescent substances
• CPC Class Codes: F21Y 2103/20 of polygonal shape, e.g. square or rectangular
• CPC Class Codes: F21Y 2113/20 of different form
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lighting device comprising a first group of solid state light emitters, an element containing luminescent material and a second group of solid state light emitters spaced from the element. In some embodiments, (1) at least 50% of light emitted by one of the first group does not mix with light emitted by the second group before the light emitted by the second group has entered the element, (2) at least 90% of exiting light emitted by the second group travels farther within the lighting device than 90% of exiting light emitted by the first group, (3) an average distance traveled by exiting light emitted by the second group is farther than an average distance traveled by exiting light emitted by the second group, and/or (4) light emitted by the first group directly exiting the lighting device exits the lighting device without being incident upon the element.

Claims

1. A lighting device comprising:

a first group of solid state light emitters comprising at least a first solid state light emitter;

a luminescent material-containing element comprising at least one luminescent material; and

a support element that defines a support element opening, the support element opening extending entirely through the support element,

the first group of solid state light emitters is on the support element, and

the luminescent material-containing element is in the support element opening and allows at least some light to pass entirely through the support element opening.

2. A lighting device as recited in claim 1, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter, and

light emitted by the second group of solid state light emitters is surrounded by light emitted by the first group of solid state light emitters.

3. A lighting device as recited in claim 1, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter,

the second solid state light emitter is in a space defined by at least one or more reflective surfaces and the luminescent material-containing element, and

the first solid state light emitter is outside the space.

4. A lighting device as recited in claim 1, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter, and

at least 75% of the light emitted by the second solid state light emitter enters the luminescent material-containing element before reaching an emission plane of the first solid state light emitter.

5. A lighting device as recited in claim 1, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter,

an emission plane of the first solid state light emitter is substantially parallel to an emission plane of the second solid state light emitter.

6. A lighting device as recited in claim 1, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter,

substantially all of the light exiting the lighting device that was emitted by the second group of solid state light emitters passes through the luminescent material-containing element and through the support element opening.

7. A lighting device as recited in claim 1, wherein a surface of the support element and a surface of the luminescent material-containing element are substantially co-planar.

8. A lighting device comprising:

a luminescent material-containing element that comprises at least one luminescent material and that defines a first opening;

a support element; and

a first group of solid state light emitters comprising at least a first solid state light emitter, the first group of solid state light emitters on the support element,

the support element in the first opening,

a plane extending through the first solid state light emitter not extending through the luminescent material-containing element.

9. A lighting device as recited in claim 8, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter, and

light emitted by the first group of solid state light emitters is surrounded by light emitted by the second group of solid state light emitters.

10. A lighting device as recited in claim 8, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter,

the second solid state light emitter is in a space defined by at least one or more reflective surfaces and the luminescent material-containing element, and

the first solid state light emitter is outside the space.

11. A lighting device as recited in claim 8, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter, and

at least 75% of the light emitted by the second solid state light emitter enters the luminescent material-containing element before reaching an emission plane of the first solid state light emitter.

12. A lighting device as recited in claim 8, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter,

an emission plane of the first solid state light emitter is substantially parallel to an emission plane of the second solid state light emitter.

13. A lighting device as recited in claim 8, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter,

substantially all of the light exiting the lighting device that was emitted by the second group of solid state light emitters passes through the luminescent material-containing element.

14. A lighting device as recited in claim 8, wherein a surface of the support element and a surface of the luminescent material-containing element are substantially co-planar.

15. A lighting device comprising:

a first group of solid state light emitters comprising at least a first solid state light emitter; and

a luminescent material-containing element comprising at least one luminescent material,

the first solid state light emitter on the luminescent material-containing element, a plane extending through the first solid state light emitter not extending through the luminescent material-containing element.

16. A lighting device as recited in claim 15, wherein the first group of solid state light emitters is on the support element.

17. A lighting device as recited in claim 15, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter, and

light emitted by the second group of solid state light emitters is surrounded by light emitted by the first group of solid state light emitters.

18. A lighting device as recited in claim 15, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter, and

light emitted by the first group of solid state light emitters is surrounded by light emitted by the second group of solid state light emitters.

19. A lighting device as recited in claim 15, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter,

the second solid state light emitter is in a space defined by at least one or more reflective surfaces and the luminescent material-containing element, and

the first solid state light emitter is outside the space.

20. A lighting device as recited in claim 15, wherein:

the lighting device further comprises a second group of solid state light emitters comprising at least a second solid state light emitter, and

at least a portion of the luminescent material-containing element is between the first solid state light emitter and the second solid state light emitter.

21. A lighting device comprising:

at least a first luminescent material-containing element that comprises at least one luminescent material;

a first group of solid state light emitters comprising at least a first solid state light emitter;

a second group of solid state light emitters comprising at least a second solid state light emitter;

at least a first reflective surface,

the second solid state light emitter in a space defined by the at least one reflective surface and the first luminescent material-containing element,

the first solid state light emitter is outside the space,

the first luminescent material-containing element outside the space, and at least some light emitted by the first solid state light emitter exits the lighting device without passing through the first luminescent material-containing element.