ILLUMINATION DEVICE AND METHOD FOR ASSEMBLY OF AN ILLUMINATION DEVICE

• US 20120069570A1
• Filed: 05/21/2010
• Published: 03/22/2012
• Est. Priority Date: 05/28/2009
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Marinus, Antonius Adrianus Maria, Uitbeijerse, Bastiaan, Teerling, Omke Jan
• Granted Patent: US 9,360,203 B2
• Time in Patent Office: Days
• US Class Current: 362/249.02
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 19/003 Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
• CPC Class Codes: F21V 19/006 of point-like light sources, e.g. incandescent or halogen lamps, with screw-threaded or bayonet base of sources having contact pins, wires or blades F21V19/0005; of LEDs or sources mounted on printed-circuit board F21V19/001
• CPC Class Codes: F21V 29/86 Ceramics or glass
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 3/06 characterised by the material
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

The present invention discloses an illumination device (100) and a method (4000) for assembly of such an illumination device. The illumination device (100) comprises a light source (110) arranged to generate light, a carrier (120) arranged to support the light source and an envelope (130) enclosing the light source and the carrier. The envelope comprises at least two enveloping parts which, when joined together, form the envelope. Further, the carrier is arranged in thermal contact with at least one of the enveloping parts for dissipating heat out of the illumination device. The method comprises the steps of mounting (4100) the light source in thermal contact with the carrier and enclosing (4200) the light source and the carrier with the envelope. The present invention is advantageous in that it provides a convenient design which facilitates the assembly of the illumination device. Further, the present invention is advantageous in that it provides an illumination device with improved heat transfer.

Claims

1. An illumination device comprising:

a light source arranged to generate light,

a carrier arranged to support said light source, said light source being in thermal contact with said carrier, and

an envelope enclosing said light source and said carrier,

wherein said envelope comprises at least two enveloping parts which, when joined together, form said envelope, and

wherein the carrier is arranged in thermal contact with at least one of the enveloping parts for dissipating heat out of said illumination device.

2. An illumination device as defined in claim 1, wherein both the envelope and the carrier comprises ceramic material.

3. An illumination device according to claim 1, wherein the envelope is bulb-shaped.

4. An illumination device according to claim 1, wherein the enveloping parts are two bulb halves.

5. An illumination device according to claim 1, wherein an enveloping part and at least part of the carrier form a single integrated part.

6. An illumination device according to claim 1, wherein the carrier is arranged at a junction between two enveloping parts.

7. An illumination device according to claim 1, wherein the enveloping parts are configured to fit one to another.

8. An illumination device according to claim 1, wherein the carrier is arranged along an axis extending from the base of the illumination device to its top or along a direction crossing an axis extending from the base of the illumination device to its top.

9. An illumination device according to claim 1, wherein said envelope comprises a transmissive region arranged to transmit at least part of the light generated by the light source.

10. An illumination device according to claim 1, wherein said carrier comprises a transmissive region arranged to transmit at least part of the light generated by the light source and/or a reflective region arranged to reflect at least part of the light generated by the light source.

11. An illumination device according to claim 1, wherein the light source comprises at least one light emitting diode (LED) or at least one LED package.

12. Method for assembly of an illumination device comprising a light source arranged to generate light, said method comprising the steps of:

mounting said light source in thermal contact with a carrier, and

enclosing said light source by joining at least two enveloping parts, thereby forming an envelope enclosing said light source, the carrier being arranged in thermal contact with at least one of the enveloping parts for dissipating heat out of said illumination device.

13. Method as defined in claim 12, wherein an enveloping part and at least part of the carrier are one single integrated part.

14. Method as defined in claim 12, further comprising the step of gluing said carrier to an enveloping part or the step of inserting said carrier at a junction between two enveloping parts.

15. Method as defined in claim 12, wherein both the envelope and the carrier comprises ceramic material.