Flexible high-power LED lighting system

• US 7,429,186 B2
• Filed: 04/06/2004
• Issued: 09/30/2008
• Est. Priority Date: 04/06/2004
• Status: Active Grant

• Current Assignee: Current Lighting Solutions, LLC (f/k/a GE Lighting Solutions, LLC) (American Industrial Partners)
• Original Assignee: Lumination LLC
• Inventors: Mrakovich, Matthew, Nall, Jeffrey
• Primary Examiner(s): Gilman; Alexander
• Application Number:
  US10/819,328
• Publication Number:
  US 20050221659A1
• Time in Patent Office: 1,638 Days
• Field of Search: 439/404, 439/403, 439/417, 362/294, 362/559, 362/373, 362/545, 362/549, 257/E33.7
• US Class Current: 439/404
• CPC Class Codes: F21S 4/10 with light sources attached to loose electric cables, e.g. Christmas tree lights
• CPC Class Codes: F21V 21/002 making direct electrical contact, e.g. by piercing F21V21/35 takes precedence
• CPC Class Codes: F21V 29/713 in direct thermal and mechanical contact of each other to form a single system
• CPC Class Codes: F21V 29/763 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/80 with pins or wires
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01R 13/7175 Light emitting diodes (LEDs)
• CPC Class Codes: H01R 25/142 Their counterparts
• CPC Class Codes: H01R 25/147 Low voltage devices, i.e. safe to touch live conductors
• CPC Class Codes: H01R 4/2416 the contact members having insulation-cutting edges, e.g. of tuning fork type

Abstract

An LED light engine includes a flexible electrical cable, a wire-socket assembly attached to the cable, and an LED module selectively attached to the wire-socket assembly. The wire-socket assembly includes at least two IDC terminals. The IDC terminal displaces the insulating covering of the cable and contacts one of the electrical conductors. The LED module includes an LED electrically connected to the IDC terminals when the LED module attaches to the wire-socket assembly.

Claims

1. A light emitting diode (LED) light engine comprising:

a flexible electrical cable including at least three electrical conductors residing in substantially the same plane and insulating covering surrounding the electrical conductors;

a plurality of wire-socket assemblies attached to the cable, each wire socket assembly including at least two insulation displacement connection (IDC) terminals, wherein each IDC terminal displaces the insulating covering of the cable and contacts one of the electrical conductors; and

a plurality of LED modules each selectively attached to a respective wire-socket assembly, each LED module including an LED, a heat sink in thermal communication with the LED, and an assembly receptacle, the LED electrically connects to the IDC terminals when the LED module attaches to the respective wire-socket assembly and the assembly receptacle receives the respective wire-socket assembly.

2. The light engine of claim 1, wherein at least one of the wire-socket assemblies includes an electrical receptacle.

3. The light engine of claim 1, wherein at least one of the LED modules includes an electrical receptacle electrically connected to the LED.

4. A channel letter comprising:

a channel letter housing; and

the light engine of claim 1 disposed in the channel letter housing.

5. The light engine of claim 1, wherein at least one of the wire-socket assemblies includes a base and the IDC terminals reside in the base such that each IDC terminal includes a first portion extending from the base toward the cable and a second portion extending from the base toward at least one of the LED modules.

6. The light engine of claim 5, wherein the at least one wire-socket assembly includes a cover at least substantially covering the IDC terminals between the first portion and the second portion.

7. The light engine of claim 5, wherein the at least one LED module includes an electrical receptacle to receive the second portion of each IDC terminal.

8. A light emitting diode (LED) light engine comprising:

a flexible electrical cable having at least two electrical conductors and insulating covering surrounding the electrical conductors;

an LED module attached to the cable, the LED module including an LED, a thermally conductive support, circuitry disposed on a first surface of the thermally conductive support, an electrical connector disposed on the first surface and in electrical communication with the circuitry and a heat sink in thermal communication with the LED via the thermally conductive support, the LED being in electrical communication with the circuitry; and

an IDC terminal inserted into the cable and into the connector, the terminal in contact with the electrical conductors and electrically connected to the LED via the electrical connector.

9. A channel letter comprising:

a channel letter housing; and

the light engine of claim 8 disposed in the channel letter housing.

10. The light engine of claim 8, wherein the electrical connector comprises a male insert electrically connected to the LED.

11. The light engine of claim 8, wherein the electrical connector comprises an electrical receptacle.

12. The light engine of claim 11, wherein the terminals include male terminal pins that are received in the electrical receptacle.

13. A light emitting diode (LED) light engine comprising:

a flexible electrical cable including at least two electrical conductors and insulating covering surrounding the electrical conductors;

a first mounting assembly attached to the cable;

a first LED module attached to the first mounting assembly and including a first LED and a first heat sink in thermal communication with the first LED;

a first insulation displacement connection (IDC) terminal disposed in the first mounting assembly, wherein the first IDC terminal is in electrical communication with the first LED and at least one of the electrical conductors; and

a second LED module attached to the cable and in electrical communication with at least one of the electrical conductors, the second LED module being spaced from the first LED module along the cable and including a second LED and a second heat sink in thermal communication with the second LED.

14. The light engine of claim 13, wherein the first heat sink is adapted to dissipate enough heat from the first module such that the first module can mount to a heat insulative surface.

15. The light engine of claim 13, wherein the first mounting assembly comprises a first component and a second component, the cable being sandwiched between the first component and the second component.

16. The light engine of claim 13, wherein the first LED module receives the first mounting assembly.

17. A channel letter comprising:

a channel letter housing; and

the light engine of claim 13 disposed in the channel letter housing.

18. A method for manufacturing an LED string light engine comprising:

providing an insulated flexible electrical cable including electrical conductors;

inserting at least one IDC terminal into the cable to contact at least one of the electrical conductors;

inserting the at least one IDC terminal into a connector mounted on a first surface of a support to electrically connect an LED mounted on the first surface of the support to the electrical conductors of the cable via the at least one IDC terminal and the connector;

contacting the support with a heat sink such that heat from the LED is drawn through the support into the heat sink; and

connecting the heat sink to the cable such that the heat sink is connected to and movable with the cable so that the string light engine can mount to a variety of different structures.

19. The method of claim 18, further comprising:

inserting the at least one IDC terminal into a wire-socket assembly; and

connecting the wire-socket assembly to the cable.

20. A string light engine comprising:

a flexible electrical cable including at least three electrical conductors and insulating covering surrounding the electrical conductors;

a plurality of wire-socket assemblies attached to the cable, each wire socket assembly including at least two insulation displacement connection (IDC) terminals and a conductor separator for electrically separating at least one of the electrical conductors, wherein each IDC terminal displaces the insulating covering of the cable and contacts one of the electrical conductors; and

a plurality of LED modules each attached to the cable via a respective wire-socket assembly, at least one LED module including a thermally conductive support, circuitry disposed on a first surface of the support, at least one LED disposed on the first surface of the support, and a heat sink in thermal communication with the support.

21. A channel letter comprising:

a channel letter housing; and

the light engine of claim 20 disposed in the channel letter housing.