US 9,752,735 B2Granted

Optically and thermally efficient high bay light fixture

AssigneeLinmore LED Labs, Inc.

InventorPaul Chamberlain

Life of this patent

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Abstract

A heat dissipating and optically efficient LED high bay light bar which may be used as part of a complete retrofit system for a variety of linear fluorescent light fixtures. The LED high bay light bar comprises an elongate channel member which is preferably fabricated from extruded aluminum. In addition to the channel member, the LED high bay light bar comprises a high-efficacy set of LEDs, which are preferably provided in the form of an elongate LED printed circuit board (PCB) or strip mechanically bonded to the channel member. The channel member is outfitted with fins and other surface features uniquely configured to provide superior heat dissipation, thus allowing the channel member to effectively function as a heat sink for the LED strip cooperatively engaged thereto. The channel member is configured to define an air flow cavity under the LED strip as allows for the effective dissipation of heat during operation of the LED light bar. The channel member also includes a parabolic reflector portion which is itself uniquely configured to provide optimal light emission/distribution characteristics.

Claims20

Dependent claims

An LED high bay light bar, comprising:

an elongate channel member defining:
an elongate support portion which defines a first surface and an opposed second surface, at least a portion of the second surface having a serrated configuration of increased surface area;
an identically configured pair of elongate coupling arm segments which at least partially overhang the first surface of the support portion;
a generally parabolic reflector portion which protrudes from the first surface of the support portion;
and
an identically configured pair of elongate rail portions integrally connected to and extending along support portion in opposed relation to each other, each of the rail portions defining a heat sink arm segment having an exteriorly presented serrated surface and a base arm segment which configured to be abutted against an underlying support surface;
an LED strip attached to and the channel member and extending along at least portion of the first surface of support portion thereof, the LED strip being maintained in engagement to the support portion by the coupling arm segments;
wherein the channel member is configured such that the second surface of the support portion is separated from the base arm segments of the rail portions by a distance sufficient to facilitate the formation of a heat dissipating airflow cavity between the second surface and the support surface when the base arm segments are abutted against the support surface, and the reflector portion is configured optimize light distribution.

5 more elements

An LED high bay light bar, comprising:

an elongate channel member defining:
an elongate support portion which defines a first surface and an opposed second surface, at least a portion of the second surface having a serrated configuration of increased surface area;
a reflector portion which protrudes from the first surface of the support portion and includes an identically configured pair of arcuate side sections which protrude from the first surface of the support portion in opposed relation to each other, each of the side sections defining a generally concave interior surface;
and
an identically configured pair of elongate rail portions integrally connected to and extending along support portion in opposed relation to each other, each of the rail portions defining a heat sink arm segment having an exteriorly presented serrated surface and a base arm segment which configured to be abutted against an underlying support surface;
an LED strip attached to and the channel member and extending along at least portion of the first surface of support portion thereof;
wherein the channel member is configured such that the second surface of the support portion is separated from the base arm segments of the rail portions by a distance sufficient to facilitate the formation of a heat dissipating air flow cavity between the second surface and the support surface when the base arm segments are abutted against the support surface, and the interior surfaces of the reflector portion are sized and configured such that light emitted from the LED strip will bounce therefrom no more than once prior to exiting the reflector portion so as to optimize light distribution therefrom.

4 more elements

An LED high bay light bar, comprising:

an elongate channel member defining:
an elongate support portion which defines a first surface and an opposed second surface;
a reflector portion which protrudes from the first surface of the support portion and includes an identically configured pair of arcuate side sections which protrude from the first surface of the support portion in opposed relation to each other, each of the side sections defining a generally concave interior surface;
and
an identically configured pair of elongate rail portions connected to and extending along support portion in opposed relation to each other, each of the rail portions defining a heat sink arm segment having an exteriorly presented surface and a base arm segment which configured to be abutted against an underlying support surface;
an LED strip attached to and the channel member and extending along at least portion of the first surface of support portion thereof;
wherein the channel member is configured such that the second surface of the support portion is separated from the base arm segments of the rail portions by a distance sufficient to facilitate the formation of a heat dissipating air flow cavity between the second surface and the support surface when the base arm segments are abutted against the support surface, and the interior surfaces of the reflector portion are sized and configured such that light emitted from the LED strip will bounce therefrom no more than once prior to exiting the reflector portion so as to optimize light distribution therefrom.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/238,125Filed 16 Aug 2016 · us provisional application
Priority: 21 Aug 2015
Published: US 2017/0051881 A123 Feb 2017
Granted: 5 Sep 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

F21K 9/275
Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes: details of bases…
F21K 9/272
Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes: details of end…
F21S 4/28
With light sources held by or within elongate supports: rigid, e.g. LED bars
F21S 8/04
Lighting devices intended for fixed installation: intended only for mounting on a ceiling or the like overhead structures

Family

Application62/208,414Us provisional application · filed 21 Aug 2015
US 2017/0051881 A1Pre-grant publication · published 23 Feb 2017
US 9,752,735 B2This patent

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

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