US 2003/0156416 A1 · LED LIGHT ASSEMBLY

Abstract

An light source utilizes a parabolic reflector to collimate light emitted from at greater than a predetermined angle relative to the optical axis of an LED arranged at the focus of the reflector. An optional collimating lens is arranged to collimate light emitted at less than the predetermined angle. Both variations provide light in the form of a substantially collimated beam. The parabolic reflector is preferably extended along its focal point to form a linear parabolic section having a linear focal axis. A linear array of LEDs is arranged such that the linear focal axis passes through the area of light emission of each LED. The linear parabolic section may be provided with parabolic dish ends. Alternatively, the ends of the parabolic section may be left open for increased wide angle visibility.

Claims23

Dependent claims

A light assembly comprising:

a parabolic reflector defining a reflecting cavity having a linear focal axis;
and
a plurality of LEDs positioned in said cavity, each said LED having an optical axis;
wherein the optical axis of each said LED intersects said linear focal axis.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/081,905Filed 21 Feb 2002

Published

21 Aug 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification28 codes

B64D 47/02
Equipment not otherwise provided for: arrangements or adaptations of signal or lighting devices
F21S 4/20
Lighting devices or systems using a string or strip of light sources: with light sources held by or within elongate supports
F21S 43/14
Characterised by the type of light source: light emitting diodes [LED]
F21S 43/15
Characterised by the type of light source: strips of light sources

Led light assembly

Life of this patent

Led light assembly

Life of this patent

Abstract

Claims23