IP Library Granted Patent US 8,638,027
Granted Patent B2
US 8,638,027 · App. 12/443,768 · Granted Jan 28, 2014

Lighting armature

Inventors: Hans Klaas Van Dijk (Sittard, NL); Franciscus Van Vehmendahl (Sittard, NL); Robert Hendrik Catharina Janssen (Beek, NL)
Assignee: DSM IP Assets B.V.
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Quick Facts
Patent No.
US 8,638,027
App. No.
12/443,768
Granted
Jan 28, 2014
Kind
B2
Abstract

The invention relates to a lighting armature or light generator, comprising a housing, a light source and drive electronics for driving the light source, wherein the having cooling fins made of a plastic composition having an orientation averaged thermal conductivity of at least 2.0 W/m·K.

Claims (14)

1. A lighting armature comprising:

a housing having cooling fins;

a light source within the housing; and

drive electronics within the housing for driving the light source, wherein

the cooling fins are made of a plastic composition comprising a polymer arid thermally conductive material dispersed in the polymer, the plastic composition having an orientation averaged thermal conductivity of at least 2.0-15 W/m·K.

2. The lighting armature according to claim 1 , wherein the cooling fins are made from a thermoplastic material having a through-plane conductivity in the range of 1 to 10 m·K, and wherein the cooling fins have height (H) and thickness (T) dimensions such that a ratio is at least 3:1.

3. The lighting armature according to claim 1 , wherein the light source comprises LEDs mounted on a metal core printed circuit board (MC-PCB).

4. The lighting armature according to claim 1 , wherein the housing comprises a metal shield with a first surface oriented towards the drive electronics and a second surface directed towards the cooling fins, and wherein the metal shield and the cooling fins are in direct heat conductive contact.

5. The lighting armature according to claim 1 , wherein the cooling fins constitute elongated elements of a plastic body comprising a plastic shield having a surface from which the elongated elements protrude.

6. The lighting armature according to claim 5 , wherein the plastic body is an integrally moulded part made of a plastic composition having an orientation averaged thermal conductivity of more than 20 W/m·K.

7. The lighting armature according to claim 6 , wherein the integrally moulded part and the light source are connected via a heat-conductive electrically insulating material.

8. The lighting armature according to claim 5 , wherein the plastic body is a 2K moulded part comprising a layer made of a first plastic composition having an orientation averaged thermal conductivity of more than 20 W/m·K, and fins made of a second plastic composition having an orientation averaged thermal conductivity of 2.0-15 W/m·K.

9. The lighting armature according to claim 1 , wherein the lighting armature accommodates parts of electrical power supply means and an electrically insulating plastic shield made of an electrically insulating material, whereby the electrically insulating plastic shield is positioned in between the electrical power supply means and the housing.

10. A housing for a lighting armature, the housing having cooling fins and being suitable for accommodating a light source and drive electronics for driving the light source, wherein the cooling fins are made of a plastic composition having an orientation averaged thermal conductivity of at least 2.0-15 W/m·K.

Assignments (2)
NUNC PRO TUNC ASSIGNMENT Recorded May 27, 2025
From: DSM IP ASSETS B.V.
To: ENVALIOR B.V.
Reel/Frame 071393/0045 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 5, 2009
From: VAN DIJK, HANS KLAAS; VAN VEHMENDAHL, FRANCISCUS; JANSSEN, ROBERT HENDRIK CATHARINA
To: DSM IP ASSETS B.V.
Reel/Frame 023473/0472 →
Priority Claims (1)
EP 06021403 · Oct 12, 2006 · regional
Continuity (1)
Related Publication 20110279035A1 · Nov 17, 2011