Configurable linear light assembly and associated methods

• US 8,899,780 B2
• Filed: 05/01/2013
• Issued: 12/02/2014
• Est. Priority Date: 05/06/2012
• Status: Active Grant

• Current Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Original Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Inventors: Maxik, Fredric S., Widjaja, Addy S., Oostdyk, Mark Andrew, Soler, Robert R., Bartine, David E.
• Primary Examiner(s): BANNAN, JULIE A
• Application Number:
  US13/874,748
• Publication Number:
  US 20140328055A1
• Time in Patent Office: 580 Days
• Field of Search: 36221701-220, 362/225
• US Class Current: 362/225
• CPC Class Codes: F21S 4/28 rigid, e.g. LED bars
• CPC Class Codes: F21S 8/03 of surface-mounted type F21S8/02, F21S8/04 take precedence; details of wall or floor bases F21V21/02
• CPC Class Codes: F21V 19/0045 by tongue and groove connections, e.g. dovetail interlocking means fixed by sliding
• CPC Class Codes: F21V 29/767 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2113/00 Combination of light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

A linear light assembly having an elongate tray and a plurality of moveable lighting packages. The elongate tray may provide both mechanical support and thermal management for the plurality of moveable lighting packages. The elongate tray may comprise a medial channel portion with a planar track member and two opposing rim members projecting perpendicularly outward therefrom. Each flange portion may have a U-shaped cross-section. Each moveable package may comprise an assembly tray and an optical assembly having at least one light-emitting device (LED). Each moveable lighting package may be adjustably positioned along and independently removed from the front side of the track member of the elongate tray. Any segmentation of the elongate tray may be characterized by a heat dissipation rate not less than a combined heat generation rate of all moveable lighting packages carried by the segment. A method aspect includes installation of the linear light assembly.

Claims

1. A linear light assembly comprising:

an elongate tray comprising

a medial channel portion comprising

a track member having a substantially planar main body defining, on opposite sides thereof, generally flat front and rear sides, and defining, on a perimeter thereof, upper and lower edges, and

two opposing rim members adjacent to the upper and lower edges of the track member, respectively; and

first and second flange portions each comprising

a base member and

a plurality of fin members adjacent to the base member; and

a plurality of moveable lighting packages carried by and in thermal communication with the elongate tray, and each comprising

an assembly tray, and

an optical assembly carried by the assembly tray and comprising at least one light source.

2. A linear light assembly according to claim 1 wherein each rim member is longitudinally coextensive with the track member.

3. A linear light assembly according to claim 1 wherein each rim member is configured to project outward in a generally perpendicular direction with respect to the front side of the track member.

4. A linear light assembly according to claim 1 wherein each of the first and second flange portions is longitudinally coextensive with the track member.

5. A linear light assembly according to claim 1 wherein at least one of the first and second flange portions has a substantially U-shaped cross-section formed by the base member and the plurality of fin members;

wherein the base member of the U-shaped cross-section has a substantially planar central body defining, on opposite sides thereof, generally flat first and second sides, and defining, on a perimeter thereof, generally linear leading and trailing edges;

wherein the plurality of fin members of the U-shaped cross-section comprises two opposing fin members positioned adjacent to the leading and trailing edges of the base member, respectively, and each fin member is configured to project perpendicularly outward from the base member in a generally parallel direction with respect to the substantially planar main body of the track member.

6. A linear light assembly according to claim 5 wherein the second side of the base member of the U-shaped cross-section is attached to a respective rim member of the medial channel portion.

7. A linear light assembly according to claim 1 wherein the elongate tray is configured to have a plurality of mounting positions;

wherein each of the plurality of mounting positions is suitable for mounting one of the plurality of moveable lighting packages so that each of the plurality of moveable lighting packages can be moveably positioned along the front side of the elongate track member.

8. A linear light assembly according to claim 1 wherein each of the plurality of moveable lighting packages is configured for removal from the front side of the track member independently of each other.

9. A linear light assembly according to claim 1 wherein the elongate tray comprises a plurality of tray segments each in mechanical and thermal communication with a subset of the plurality of moveable lighting packages;

wherein a heat dissipation rate of each of the plurality of tray segments is not less than a combined heat generation rate of the subset of the plurality of moveable lighting packages.

10. A linear light assembly according to claim 1 wherein the elongate tray comprises at least one mounting assembly configured to receive a respective at least one of the plurality of moveable lighting packages;

and wherein the at least one mounting assembly is of a type selected from the group consisting of fasteners, snap-fit connectors, and fitted grooves.

11. A linear light assembly according to claim 1 wherein the medial channel portion and the first and second flange portions are integrally molded as a monolithic unit;

and wherein the optical assembly and the assembly tray are integrally molded as a monolithic unit.

12. A linear light assembly according to claim 1 wherein the elongate tray is configured to connect mechanically and thermally to a housing;

and wherein a combined heat dissipation rate of the elongate tray and of the housing is not less than a combined heat generation rate of the plurality of moveable lighting packages in thermal communication with the elongate tray.

13. A linear light assembly according to claim 1 wherein the elongate tray is constructed of a heat-dissipating material selected from the group consisting of thermoplastic, ceramic, porcelain, aluminum, and aluminum alloys.

14. A linear light assembly according to claim 1 wherein the assembly tray and the track member form a generally central passageway therebetween configured to allow an electrical connection to pass from a power supply through an aperture in the track member and to extend through the central passageway to an electrical contact on the at least one light source.

15. A linear light assembly comprising:

an elongate tray configured to have a plurality of mounting positions and comprising

a medial channel portion comprising

a track member having a substantially planar main body defining, on opposite sides thereof, generally flat front and rear sides, and defining, on a perimeter thereof, upper and lower edges, and

two opposing rim members adjacent to the upper and lower edges of the track member, respectively, wherein each rim member is longitudinally coextensive with the track member; and

first and second flange portions each having a base member and a plurality of fin members adjacent to the base member so as to form a substantially U-shaped cross section, each of the first and second flange portions being longitudinally coextensive with the track member,

a plurality of moveable lighting packages carried by and in thermal communication with the elongate tray, and each comprising an assembly tray, and an optical assembly carried by the assembly tray and comprising at least one light emitting diode (LED);

wherein each of the plurality of mounting positions on the elongate tray is suitable for mounting one of the plurality of moveable lighting packages so that each of the plurality of moveable lighting packages can be moveably positioned along the front side of the elongate track member.

16. A linear light assembly according to claim 15 wherein the elongate tray is constructed of a heat-dissipating material selected from the group consisting of thermoplastic, ceramic, porcelain, aluminum, and aluminum alloys.

17. A linear light assembly according to claim 15 wherein the elongate tray comprises a plurality of tray segments each in mechanical and thermal communication with a subset of the plurality of moveable lighting packages;

wherein a heat dissipation rate of each of the plurality of tray segments is not less than a combined heat generation rate of the subset of the plurality of moveable lighting packages.

18. A method of installing a linear light assembly comprising an elongate tray in mechanical and thermal communication with each of a plurality of moveable lighting packages, the elongate tray characterized by a plurality of mounting positions suitable for mounting of one of the plurality of moveable lighting packages, and comprising a medial channel portion comprising a track member having a substantially planar main body defining on opposite sides thereof generally flat front and rear sides and defining on a perimeter thereof upper and lower edges, and two opposing rim members adjacent to the upper and lower edges of the track member, respectively;

and first and second flange portions each comprising a base member and a plurality of fin members adjacent to the base member; and

each of the plurality of moveable lighting packages comprising an assembly tray and an optical assembly carried by the assembly tray and comprising at least one light source;

the method comprising;

adjustably positioning each of the moveable lighting packages on the medial channel portion of the elongate tray;

affixing the each of the plurality of moveable lighting packages to a respective mounting position.

19. A method according to claim 18 wherein the elongate tray further comprises first and second tray segments;

the method further comprising;

moving each of a first subset of the plurality of moveable lighting packages to a respective mounting position on the first tray segment;

removing each of a second subset of the plurality of moveable lighting packages from the second tray segment;

mechanically separating the second tray segment and the first tray segment;

mounting the first tray segment to a light fixture.

20. A method according to claim 19 wherein mechanically separating the second tray segment and the first tray segment comprises cutting the elongate tray;

and further comprising removing the power supply from the second tray segment and mounting the power supply to the first tray segment.