Lighting device package

• US 7,631,986 B2
• Filed: 10/31/2007
• Issued: 12/15/2009
• Est. Priority Date: 10/31/2006
• Status: Active Grant

• Current Assignee: Lumileds LLC (Apollo Global Management, Inc.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Harrah, Shane
• Primary Examiner(s): Truong; Bao Q
• Application Number:
  US11/980,991
• Publication Number:
  US 20080180960A1
• Time in Patent Office: 776 Days
• Field of Search: 362/230, 362/231, 362/363, 36224901-24906, 362/555, 362/311.02, 362/294, 362/800, 257/79, 257/98, 257/99, 257/100, 257/103
• US Class Current: 362/230
• 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 33/483 Containers
• CPC Class Codes: H01L 33/54 having a particular shape
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

The present invention provides a lighting device package that is configured to enable degassing of the lighting device package. The lighting device package comprises a substrate upon which is operatively mounted one or more light-emitting elements and a retaining structure which is coupled to the substrate and configured to circumscribe the one or more light-emitting elements. In addition, the lighting device package includes an optically transmissive element, wherein two or more supports are configured to provide a separation between the optically transmissive element and the substrate or retaining structure. The volume defined by the substrate, retaining structure and the optically transmissive element, is partially or completely filled with an encapsulation material, thereby forming the lighting device package. In particular, the supports create a series of openings for the volume defined by the substrate, retaining structure and the optically transmissive element, wherein these openings provide for movement of fluid therethrough.

Claims

1. A lighting device package comprising:

a substrate;

one or more light-emitting elements operatively coupled to the substrate;

a retaining structure coupled to the substrate and circumscribing the one or more light-emitting elements;

an optically transmissive element coupled to the substrate and positioned to intersect a path of electromagnetic radiation emitted by the one or more light-emitting elements;

a light transmissive encapsulation material positioned within a volume defined by the substrate, the optically transmissive element and the retaining structure, the encapsulation material thereby at least partially encapsulating the one or more light-emitting elements therein; and

two or more supports extending at least partially between the optically transmissive element and the substrate, the two or more supports configured to support the optically transmissive element;

wherein the two or more supports are disposed to provide two or more openings for the volume for movement of fluid therethrough.

2. The lighting device package of claim 1 wherein the two or more supports are flexible, compressible, extensible, or a combination thereof.

3. The lighting device package of claim 1 wherein each of the two or more supports has a cross section and a contact surface, wherein the cross section is smaller at the contact surface.

4. The lighting device package of claim 3 wherein the contact surface is substantially a point of contact.

5. The lighting device package of claim 3 wherein the contact surface is substantially a point line of contact.

6. The lighting device package of claim 1 wherein each support has a contact surface, the contact surface having a shape selected from the group comprising conical, hemispherical, cylindrical, frustroconical, flat, curved and convex.

7. The lighting device package of claim 1 wherein the retaining structure is integrally formed with the optically transmissive element.

8. The lighting device package of claim 1 wherein the retaining structure is operatively disposed on the substrate.

9. The lighting device package of claim 1 wherein the two or more supports are integrally formed with the optically transmissive element.

10. The lighting device package of claim 1 wherein the two or more supports are connected to the optically transmissive element.

11. The lighting device package of claim 9 wherein the supports contact one or more of the substrate and the retaining structure.

12. The lighting device package of claim 10 wherein the supports contact one or more of the substrate and the retaining structure.

13. The lighting device package of claim 1 wherein the retaining structure comprises an inner wall configured as a stepped wall to provide a support surface for the two or more supports.

14. The lighting device package of claim 1 wherein the two or more supports are integrally formed with the substrate.

15. The lighting device package of claim 1 wherein the two or more supports are connected to the substrate.

16. The lighting device package of claim 1 wherein the two or more supports are integrally formed with the retaining structure.

17. The lighting device package of claim 1 wherein the two or more supports are connected to the retaining structure.

18. The lighting device package of claim 1 wherein the optically transmissive element has a surface facing the light-emitting elements, wherein the surface is convex.

19. A lighting device package comprising:

a substrate;

one or more light-emitting elements operatively coupled to the substrate;

a retaining structure coupled to the substrate and circumscribing the one or more light-emitting elements;

an optically transmissive element coupled to the substrate and positioned to intersect a path of electromagnetic radiation emitted by the one or more light-emitting elements;

a light transmissive encapsulation material positioned within a volume defined by the substrate, the optically transmissive element and the retaining structure, the encapsulation material thereby at least partially encapsulating the one or more light-emitting elements therein; and

two or more supports extending at least partially between the optically transmissive element and the substrate for supporting the optically transmissive element, each of the two or more supports having a cross section and a contact surface, wherein the cross section is smaller at the contact surface;

wherein the two or more supports are disposed to provide two or more openings for the volume for movement of fluid therethrough.

20. The lighting device package of claim 19 wherein the two or more supports are flexible, compressible, extensible, or a combination thereof.

21. The lighting device package of claim 19 wherein the contact surface is substantially a point of contact.

22. The lighting device package of claim 19 wherein the contact surface is substantially a point line of contact.

23. The lighting device package of claim 19 wherein the two or more supports are integrally formed with the retaining structure.

24. The lighting device package of claim 19 wherein the two or more supports are integrally formed with the substrate.

25. The lighting device package of claim 19 wherein the retaining structure is integrally formed with the optically transmissive element.