Illumination device with an envelope enclosing a light source

Patent metadata

Field	Value
Publication number	US-9377167-B2
Application number	US-201314032229-A
Country	US
Kind code	B2
Filing date	Sep 20, 2013
Priority date	May 28, 2009
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

The invention provides an illumination device comprising an envelope enclosing a light source, preferably a LED, and a luminescent material. The envelope comprises a transmissive part, and a reflective part, wherein the reflective part comprises a reflective ceramic material. The ceramic material can be used for heat dissipation.

First claim

The invention claimed is:

1. A lamp, comprising:
a fitting;
a support structure coupled to the fitting, the support structure defining at least a first compartment and a second compartment, the first compartment and the second compartment each including a reflective part comprising a reflective ceramic material;
one or more first compartment LEDs supported by the support structure in the first compartment;
wherein the first compartment LEDs are arranged to generate first compartment light source light, and the reflective part of the first compartment is arranged to reflect at least part of the first compartment light source light;
one or more second compartment LEDs supported by the support structure in the second compartment;
wherein the second compartment LEDs are arranged to generate second compartment light source light, and the reflective part of the second compartment is arranged to reflect at least part of the second compartment light source light; and
one or more transmissive parts arranged to transmit at least part of the first compartment light source light and the second compartment light source light, thereby providing lamp light downstream of the transmissive parts;
wherein the fitting is arranged about a central axis and wherein a second axis that is perpendicular to the central axis intersects at least one of the first compartment LEDs and intersects at least one of the transmissive parts.

2. The lamp of claim 1 , wherein the first compartment and the second compartment each include a luminescent material.

3. The lamp of claim 2 , wherein the luminescent material of the first compartment is downstream of and spaced from the first compartment LEDs.

4. The lamp of claim 1 , wherein the fitting is rotatable about the central axis to enable installation of the lamp.

5. The lamp of claim 4 , wherein the first compartment LEDs are mounted on a surface that is substantially parallel to the central axis.

6. The lamp of claim 4 , wherein the first compartment LEDs include a first LED and a second LED arranged along a first compartment LED axis that is substantially parallel to the central axis, the first LED being more proximal to the fitting than the second LED is to the fitting.

7. The lamp of claim 1 , wherein the reflective part of the first compartment is arranged to restrict the first compartment light source light to the first compartment prior to transmission of the at least part of the first compartment light source light through the one or more transmissive parts.

8. The lamp of claim 1 , wherein the one or more transmissive parts include a first transmissive part arranged to transmit the at least part of the first compartment light source light and a second transmissive part arranged to transmit the at least part of the second compartment light source light.

9. The lamp of claim 1 , further comprising an intermediary part interposed between the fitting and the support structure.

10. The lamp of claim 9 , wherein the intermediary part includes a heat sink.

11. The lamp of claim 10 , wherein the support structure is attached to or integrated with the heat sink.

12. A lamp, comprising:
a fitting arranged about a central axis and rotatable about the central axis to enable installation of the lamp;
one or more first envelope LEDs configured to generate first light source light primarily directed toward a transmissive part;
a support structure coupled to the fitting, the support structure comprising ceramic material and defining, for a first envelope of the lamp:
a support arranged substantially parallel to the central axis and supporting the first envelope LEDs; and
a reflective part that comprises a reflective ceramic material and is arranged to reflect at least part of the first light source light;
wherein the transmissive part is arranged to transmit at least part of the first light source light, thereby providing lamp light downstream of the transmissive part.

13. The lamp of claim 12 , wherein the first envelope includes a luminescent material arranged to absorb at least part of the first light source light and emit luminescent material light.

14. The lamp of claim 13 , wherein the luminescent material of the first envelope is downstream of and spaced from the first envelope LEDs.

15. The lamp of claim 14 , wherein the luminescent material is provided as an internal coating to at least part of the transmissive part.

16. The lamp of claim 14 , wherein the luminescent material is upstream of and spaced from the transmissive part.

17. The lamp of claim 12 , wherein the reflective part is arranged to restrict the first light source light to the first envelope prior to transmission of the at least part of the first light source light through the transmissive part.

18. A lamp, comprising:
a fitting arranged about a central axis and rotatable about the central axis to enable installation of the lamp;
one or more first LEDs configured to generate first light source light;
one or more second LEDs configured to generate second light source light;
a support structure coupled to the fitting, the support structure comprising reflective ceramic material and defining at least a first chamber and a second chamber, the first chamber including a first support arranged substantially parallel to the central axis and supporting the first LEDs, and the second chamber including a second support arranged substantially parallel to the central axis and supporting the second LEDs
one or more transmissive parts arranged to transmit at least part of the first light source light and the second light source light, thereby providing lamp light downstream of the transmissive parts, wherein the at least part of the first light source light and the at least part of the second light source light comprise unreflected light of the first light source light and the second light source light.

19. The lamp of claim 18 , further comprising a heatsink interposed between the fitting and the support structure, the heatsink being attached to or integrated with the support structure.

20. The lamp of claim 19 , wherein the support structure and the heatsink are one integral ceramic part.

Assignees

• Koninkl Philips Nv

Inventors

• Gielen Vincent Stefan David
• Ter Weeme Berend Jan Willem
• Ansems Johannes Petrus Maria
• Staats Cornelia Titia
• Kappen Theodorus Gerardus Marinus Maria
• Treurniet Theodoor Cornelis

Classifications

• H10W90/00

  Package configurations · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• H10H20/8515

  not being in contact with the bodies · CPC title

• H10H20/8583

  not being in contact with the bodies · CPC title

• H10H20/856

  Reflecting means · CPC title