Light emitting diode component

• US 8,362,695 B2
• Filed: 09/17/2010
• Issued: 01/29/2013
• Est. Priority Date: 08/30/2002
• Status: Expired due to Term

• Current Assignee: Savant Technologies, LLC (Savant Systems, LLC)
• Original Assignee: GE Lighting Solutions LLC (Savant Systems, LLC)
• Inventors: Aanegola, Srinath K., Radkov, Emil V., Reginelli, James, Stadelman, Larry R., Mrakovich, Matthew, Stimac, Tomislav J.
• Primary Examiner(s): Patel, Vip
• Application Number:
  US12/884,612
• Publication Number:
  US 20110001422A1
• Time in Patent Office: 865 Days
• Field of Search: 313/498, 313/501, 313/502, 313/504, 313/506, 313/512
• US Class Current: 313/506
• CPC Class Codes: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: F21V 23/00 Arrangement of electric circuit elements in or on lighting devices characterised by cooling arrangements F21V29/508
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• 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 2924/00014 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 2924/01322 Eutectic Alloys, i.e. obtained by a liquid transforming into two solid phases
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body

Abstract

In a lighting package, a printed circuit board supports at least one light emitting die. A light transmissive cover is disposed over the at least one light emitting die. A phosphor is disposed on or inside of the light transmissive dome-shaped cover. The phosphor outputs converted light responsive to irradiation by the at least one light emitting die. An encapsulant substantially fills an interior volume defined by the light-transmissive cover and the printed circuit board.

Claims

1. A lighting apparatus comprising:

a support surface;

a light source comprising at least one light emitting diode (LED) chip, the light source being disposed on the support surface;

a light transmissive body including a phosphor, said body being disposed over and spaced apart from the light source, the phosphor configured to perform wavelength conversion of light emitted by the light source; and

reflecting surfaces extending between the support surface and the light transmissive body;

wherein the support surface, the light transmissive body, and the reflecting surfaces are arranged and dimensioned respective to the light source such that most light scattered back from the phosphor strikes either the reflecting surfaces or the light transmissive body.

2. The lighting apparatus as set forth in claim 1, wherein the light transmissive body is arcuate having a perimeter larger than a perimeter of the support surface, and the reflecting surfaces extend between the smaller perimeter of the support surface and the larger perimeter of the arcuate light transmissive body.

3. The lighting apparatus as set forth in claim 1, wherein the reflecting surfaces comprise at least substantially transverse reflecting surfaces that are at least substantially transverse to the support surface.

4. The lighting apparatus as set forth in claim 3, wherein the transverse reflecting surfaces extend at a nonperpendicular angle between a smaller perimeter of the support surface and a larger perimeter of the light transmissive body.

5. The lighting apparatus as set forth in claim 1, wherein the reflecting surfaces include a reflector cup containing the light source.

6. The lighting apparatus as set forth in claim 5, wherein the reflecting surfaces further include one or more reflecting surfaces other than the reflecting cup that extend between the reflector cup and the light transmissive body.

7. The lighting apparatus as set forth in claim 1, wherein the support surface is planar and the light transmissive body is spaced apart from the plane of the support surface, and the reflecting surfaces include reflective sidewalls extending from the planar support surface to the light transmissive body.

8. The lighting apparatus as set forth in claim 7, wherein the reflective sidewalls include slanted reflective sidewalls.

9. The lighting apparatus as set forth in claim 7, wherein the light transmissive body comprises a planar phosphor inclusive surface spaced apart from planar support surface.

10. The lighting apparatus as set forth in claim 1, wherein the light source comprises an elongated light source comprising a plurality of LED chips distributed on and over a length of an elongated support surface, and the light transmissive body has elongation commensurate with the elongation of the elongated support surface.

11. The lighting apparatus as set forth in claim 10, wherein the reflecting surfaces include reflective sidewalls extending from the elongated support surface to the elongated light transmissive body.

12. The lighting apparatus as set forth in claim 1, wherein the lighting apparatus is oriented as a downlight.

13. The lighting apparatus as set forth in claim 1, wherein the support surface comprises a reflective support surface.

14. A lighting apparatus comprising:

at least one light emitting diode (LED) chip; and

a light mixing chamber including reflecting surfaces defining a light output aperture of the light mixing chamber and a light transmissive body including a phosphor, said light transmissive body being disposed over the light output aperture of the light mixing chamber, the phosphor configured to perform wavelength conversion of light emitted by the at least one LED chip;

wherein the at least one LED chip is disposed in the light mixing chamber and is spaced apart from the light transmissive body such that most light scattered in the light mixing chamber strikes either the reflecting surfaces or the light transmissive body.

15. The lighting apparatus as set forth in claim 14, wherein the reflecting surfaces have reflectivity of greater than 95%.

16. The lighting apparatus as set forth in claim 14, wherein the at least one LED chip comprises a set of LED chips and the light transmissive body including a phosphor comprises a phosphor panel behind which the set of LED chips is mounted.

17. The lighting apparatus as set forth in claim 16, wherein the reflecting surfaces in combination with the phosphor panel surround the set of LEDs.

18. The lighting apparatus as set forth in claim 17, wherein the reflecting surfaces do not comprise phosphor.

19. The lighting package as set forth in claim 14, wherein the reflecting surfaces comprise a reflector cup.

20. A lighting apparatus comprising:

a light source comprising a set of (LED) chips disposed on an electrical interconnect board;

a phosphor surface spaced apart from the light source, the phosphor surface comprising phosphor configured to perform wavelength conversion of light emitted by the light source; and

reflecting surfaces not comprising phosphor combining with the phosphor surface to surround the set of LEDs.

21. The lighting apparatus as set forth in claim 20, wherein the reflecting surfaces and the phosphor surface are arranged and dimensioned respective to the light source such that most light scattered back from the phosphor surface strikes either the reflecting surfaces or the phosphor surface.

22. The lighting apparatus as set forth in claim 20, wherein the electrical interconnect board is a reflecting electrical interconnect board and the reflecting surfaces include the reflecting electrical interconnect board.

23. The lighting apparatus as set forth in claim 20, wherein the set of LEDs comprises multiple blue or UV emitting LEDs.

24. The lighting apparatus as set forth in claim 20, wherein the lighting apparatus comprises a downwardly oriented downlight.

25. The lighting apparatus as set forth in claim 20, wherein the lighting apparatus comprises a panel lamp in which the phosphor surface comprises a phosphor panel and the set of LEDs is mounted behind the phosphor panel.

26. A lighting apparatus comprising:

a support surface;

a light source comprising at least one light emitting diode (LED) chip, the light source being disposed on the support surface;

an arcuate phosphor surface comprising phosphor disposed over and spaced apart from the light source, said phosphor surface having a perimeter larger than a perimeter of the support surface, the phosphor configured to perform wavelength conversion of light emitted by the light source; and

reflecting surfaces extending between the smaller perimeter of the support surface and larger perimeter of the phosphor surface;

wherein the support surface, the phosphor surface, and the reflecting surfaces are arranged and dimensioned respective to the light source such that most light scattered back from the phosphor surface strikes either the reflecting surfaces or the phosphor surface.