US 7,654,703 B2Granted

Directly viewable luminaire

AssigneeKoninklijke Philips Electronics N.V.

InventorsPeter Kan, Adrian Weston

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Abstract

A luminaire comprising a housing having thermally separate compartments for an electronics portion and a lighting portion. These thermally separate compartments can provide thermal isolation between the electronics portion and the lighting portion. The lighting portion comprises a plurality of light-emitting elements and further includes an optical device comprising two linear diffuser elements and can be used to further improve the light emission characteristics of the light-emitting elements thereby providing a directly viewable luminaire wherein the illumination produced by point light sources appears uniform along the length of the luminaire. A power supply for supply of energy to the light-emitting elements and a controller for controlling application of energy from a power source to the light-emitting elements is provided in the electronics portion and can be thermally separated within the electronics portion.

Claims21

Dependent claims

A luminaire comprising:

a housing defining a first internal compartment containing one or more light-emitting elements mounted on a base connected to the housing, the housing further defining a second internal compartment containing electronic driver means coupled to the one or more light-emitting elements for providing controlled electrical energy to the one or more light-emitting elements, the second internal compartment configured to dissipate heat generated by the electronic driver means, said first internal compartment thermally separated from the second internal compartment,
wherein the driver means comprises a controller enclosed by a first enclosure configured to thermally shield the controller within the second internal compartment and a power supply coupled to the controller and enclosed by a second enclosure configured to thermally shield the power supply within the second internal compartment,
wherein the housing further includes a base cover enclosing the second internal compartment, the base cover comprising a heat sink, and
wherein a heat sink of the controller and a heat sink of the power supply are configured such that each of the heat sink of the controller and the heat sink of the power supply form at least a portion of the base cover.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 11/695,396Filed 2 Apr 2007 · division
Priority: CA 245638528 Jan 2004
Published: US 2007/0274084 A129 Nov 2007
Granted: 2 Feb 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification22 codes

F21S 4/20
Lighting devices or systems using a string or strip of light sources: with light sources held by or within elongate supports
F21V 23/02
Arrangement of electric circuit elements in or on lighting devices: the elements being transformers, impedances or power supply units, e.g. a…
F21V 29/15
Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems: thermal insulation
F21V 29/70
Cooling arrangements: characterised by passive heat-dissipating elements, e.g. heat-sinks

Family

Application11/046,176Parent of this division · filed 28 Jan 2005
US 2007/0274084 A1Pre-grant publication · published 29 Nov 2007
US 7,267,461 B2Parent of this division
US 2005/0207166 A1Published application
US 7,654,703 B2This patent

From the US filing history. Foreign family members aren’t listed.