LED lighting system for a cabinet sign

• US 7,926,977 B2
• Filed: 09/17/2008
• Issued: 04/19/2011
• Est. Priority Date: 09/17/2007
• Status: Active Grant

• Current Assignee: Current Lighting Solutions, LLC (f/k/a GE Lighting Solutions, LLC) (American Industrial Partners)
• Original Assignee: GE Lighting Solutions LLC (Savant Systems, LLC)
• Inventors: Owens, John, Nall, Jeffrey M., Wang, Xin, Carpenter, Kevin, Saha, Koushik, Halley, Douglas R.
• Primary Examiner(s): Ward; John A
• Application Number:
  US12/212,136
• Publication Number:
  US 20090073693A1
• Time in Patent Office: 944 Days
• Field of Search: 362/240, 362/249.01, 362/249.02, 362/249.06, 362/249.04, 362/249.11, 362/812, 405/44, 405/72
• US Class Current: 362/249.02
• CPC Class Codes: G09F 13/04 Signs, boards or panels, illuminated from behind the insignia
• CPC Class Codes: G09F 13/22 electroluminescent electroluminescent light sources per se H05B33/00
• CPC Class Codes: G09F 2013/1895 Imitating a neon tube

Abstract

A lighting system generally includes a plurality of electrically interconnected modules. Each module includes a support, circuitry on the support, at least two light emitting diodes (“LEDs”) on the support and electrically connected to the circuitry, and a housing over the support for covering the circuitry. A first LED on a first surface of the support emits light in a first general direction and a second LED mounted on a second surface of the support emits light in a second general direction, which is opposite the first general direction.

Claims

1. A lighting system for illuminating a sign, the system comprising:

a plurality of electrically interconnected modules each including;

a support,

circuitry on the support,

at least two light emitting diodes (“

LEDs”

) electrically connected to the circuitry, a first LED on a first surface of the support and facing in a first direction to emit light toward the first direction and a second LED on a second surface of the support and facing in a second direction, which is opposite the first direction, to emit light in a second general direction,

a housing over the at least one support for covering the circuitry, and

at least one electrical conductor electrically connecting the modules and a rigid spine connected with the modules, the spine being more rigid than the at least one electrical conductor for fixing the modules in relation to one another.

2. The system of claim 1, wherein the support comprises a double-sided printed circuit board (“

PCB”

).

3. The system of claim 1, wherein the support comprises at least two single-sided PCBs.

4. The system of claim 1, wherein the spine includes a tubular member that surrounds the modules, the tubular member having a translucent section for allowing light from the LEDs to escape the tubular member, the translucent section being positioned with respect to the LEDs such that direct light from each LED escapes through a respective translucent section.

5. The system of claim 4, further comprising an end cap connected with the tubular member, the end cap being configured for connection with an associated sign housing.

6. The system of claim 5, wherein the end cap includes a recess that receives the tubular member, the recess and the tubular member have a non-circular configuration in cross section.

7. The system of claim 5, wherein the end cap includes a cavity surrounded by a base having a planar mounting surface, the cavity being large enough to cover a conventional fluorescent lamp socket.

8. The system of claim 4, wherein the tubular member includes a first section detachable from a second section to provide access to the modules.

9. The system of claim 8, wherein the first section pivots away from the second section about an axis parallel to a longest dimension of the tubular member.

10. The system of claim 1, wherein the spine includes projections that define a channel, the modules being received in the channel.

11. The system of claim 1, wherein the housing includes integrally formed mounting features having a generally planar surface for attaching the modules to an associated mounting beam disposed in an associated sign housing.

12. The system of claim 1, wherein each module includes a tongue at a first end and a slot at a second end, each tongue being configured to cooperate with a respective slot of an adjacent module for attaching adjacent modules together.

13. The system of claim 12, wherein each module includes electrical wires on each tongue and in each slot, the wires being electrically connected with the LEDs.

14. The system of claim 12, further comprising a plurality of end caps electrically interconnected via an electrical conductor, the end caps being configured to connect with either the tongue or the slot of each module, the end caps including electrical circuitry for electrically connecting the LEDs of the modules with the electrical conductor.

15. The system of claim 1, further comprising a plurality of links, each link mechanically, but not electrically, connecting a first module to an adjacent second module.

16. The system of claim 15, wherein each link includes a first connector and a set of second connectors, the first connector configured for attaching to the first module and each second connector configured for attaching to the second module to allow for different spacings between the first module and the adjacent second module.

17. The system of claim 1, wherein a first module pivotally connects to a second module.

18. The system of claim 17, wherein the modules are collapsible to a knocked down configuration.

19. A lighting system for illuminating a sign, the system comprising:

a plurality of electrically interconnected modules each including;

a support;

circuitry on the support;

at least two light emitting diodes (“

LEDs”

) on the support and electrically connected to the circuitry, a first LED on a first surface of the support and emitting light in a first general direction and a second LED mounted on a second, opposite, surface of the support and emitting light in a second general direction, which is opposite the first direction;

a housing over the support for covering the circuitry; and

a rigid tubular member receiving the housing and having a translucent section for allowing light from the LEDs to escape the tubular member.

20. The system of claim 19, further comprising an end cap connected with the tubular member, the end cap including a planar mounting surface normal to a longest dimension of the tubular member and fastener openings through the end cap at the planar mounting surface for receiving fasteners for attaching the end cap to an associated sign housing.

21. A lighting system comprising:

a plurality of electrically interconnected modules each including;

a support having a first generally planar surface and a second generally planar surface, the first surface being generally parallel to the second surface;

a first plurality of light emitting diodes (“

LEDs”

) aligned generally along a first axis on the first surface facing a first direction;

a second plurality of LEDs aligned generally along a second axis on the second surface facing a second direction, which is opposite the first direction;

circuitry electrically interconnecting the LEDs; and

a protective covering over the circuitry.

22. The system of claim 21, further comprising a beam spreading optic associated with each LED.