Lighting device

• US 9,115,853 B2
• Filed: 01/04/2012
• Issued: 08/25/2015
• Est. Priority Date: 01/11/2011
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Bukkems, Peter Johannes Martinus, Marinus, Antonius Adrianus Maria, Nikol, Hans, Van Der Padt, Arie
• Primary Examiner(s): Negron, Ismael
• Application Number:
  US13/978,547
• Publication Number:
  US 20130286645A1
• Time in Patent Office: 1,329 Days
• US Class Current: 1/1
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21V 17/10 characterised by specific fastening means or way of fastening F21V17/02 - F21V17/08 take precedence
• CPC Class Codes: F21V 19/004 by deformation of parts or snap action mountings, e.g. using clips
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21V 29/502 characterised by the adaptation for cooling of specific components
• CPC Class Codes: F21V 29/506 of globes, bowls or cover glasses
• CPC Class Codes: F21V 29/86 Ceramics or glass
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21Y 2103/33 annular
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05K 1/00 Printed circuits
• CPC Class Codes: H05K 1/0203 Cooling of mounted components H05K1/0272 takes precedence
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]
• CPC Class Codes: H05K 2201/10393 Clamping a component by an element or a set of elements
• CPC Class Codes: H05K 3/202 using self-supporting metal foil pattern
• CPC Class Codes: Y10T 29/49128 Assembling formed circuit to base

Abstract

A lighting device includes at least one light source arranged in contact with an electrically conducting layer, and mechanically secured to an electrically insulating heat sink element.

Claims

1. A lighting device comprising:

at least one light source arranged to generate light and mounted on an electrically conductive flexible substrate;

an electrically insulating heat sink element;

a bulb forming an envelope and in thermal connectivity with the insulating heat sink element;

said at least one light source arranged in contact with said electrically flexible substrate;

a fastener compressively extending about the flexible substrate and the heat sing element;

the electrically conducting flexible substrate folded about a fold axis around the heat sink element;

the fastener including a first and a second leg separated by a recess, the recess receiving the at least one light source between the first and second leg.

2. A lighting device comprising:

at least one light source arranged to generate light and mounted on an electrically conductive flexible substrate;

an electrically insulating heat sink element;

a bulb forming an envelope in thermal connectivity with the insulating heat sink element;

the electrically conductive flexible substrate sized to be retained on the heat sink element by a mechanical fastener;

the at least one light source arranged in contact with the electrically flexible substrate;

the electrically conducting flexible substrate folded about a fold axis around the heat sink element;

wherein the fastener positioned on the electrically insulating heat sink aligns the electrically conductive layer and limits the movement of the at least one light source.

3. The lighting device of claim 2 wherein the bulb includes a first half and a second half, each of the first half and the second half having an electrically insulating heat sink element.

4. A lighting device comprising:

at least one light source arranged to generate light;

an electrically insulating heat sink element; and

a flexible electrically conducting layer;

wherein said at least one light source is arranged in contact with said electrically conducting layer,

wherein said electrically conducting layer is mounted to said heat sink element by means of a mechanical fastener and

wherein the electrically conducting layer is folded about a fold axis around the heat sink element;

the mechanical fastener includes at least a first and a second leg separated by a recess, the recess receiving the at least one light source between the first and second leg such that the light source is received by the mechanical fastener positioning, in two dimensions, the light source on the heat sink element when the fastener is installed about the heat sink element.

5. A lighting device according to claim 4, wherein said fastener is arranged for distributing a mechanical force at predetermined positions.

6. A lighting device according to claim 4, wherein said fastener is a clamp.

7. A lighting device according to claim 4, wherein said electrically conducting layer is arranged having electrical leads arranged for powering of said at least one light source.

8. A lighting device according to claim 4, wherein said electrically conductive layer is arranged in said fastener.

10. A lighting device according to claim 4, wherein said heat sink element comprises a ceramic material.

11. The lighting device of claim 4 wherein each of the first and second leg further each are arranged with a round for creating contact surfaces facing the heat sink element such that the mechanical force of the mechanical fastener is distributed to predetermined positions to fixate and ensure sufficient thermal connection of the heat sink element and the conducting layer.

12. A lighting device according to claim 4, further comprising an insulating layer arranged at said electrically conducing layer.

13. A lighting device according to claim 12, wherein at least one of the insulating layer and the fastener are reflective.

14. The lighting device of claim 4 wherein the mechanical fastener includes a fold axis.

15. The lighting device of claim 14 wherein the mechanical fastener includes a central subpart between the first and second leg which extends a central predetermined distance from the fold axis which is less than a predetermined distance of the first or second leg.

16. A lighting device according to claim 4, further comprising an envelope enclosing said light source and said heat sink element.

17. A lighting device according to claim 16, wherein said heat sink element is thermally coupled to said envelope.

18. A lighting device according to claim 16, wherein at least part of said heat sink element and said envelope are one single integrated part.

19. A lighting device according to claim 4, further comprising flexible linear electric connection means extending up to said at least one light source.

20. A lighting device according to claim 19, wherein each of said linear connection means is located on that side of said heat sink element which is opposite to the light source up to which this linear connection means extends.

21. A lighting device according to claim 20, wherein said heat sink element comprises two overlapping parts between which is defined an overlap zone, in which said linear connection means are arranged.

9. A lighting device comprising:

at least one light source arranged to generate light;

an electrically insulating heat sink element having a recess;

a flexible electrically conducting layer;

wherein said at least one light source is arranged in contact with said electrically conducting layer;

wherein said electrically conducting layer is mounted to said heat sink element by an adhesive in the recess;

wherein the electrically conducting layer is folded about a fold axis around the heat sink element;

the adhesive positioning, in two dimensions, the light source on the heat sink element when the light source is installed on the heat sink element;

said recess formed in the heat sink element having the shape of the electrically conducting layer; and

said electrically conductive layer affixed to said heat sink element in the recess by the adhesive.