LED extrusion light engine and connector therefor

• US 6,660,935 B2
• Filed: 05/25/2001
• Issued: 12/09/2003
• Est. Priority Date: 05/25/2001
• Status: Expired due to Term

• Current Assignee: Current Lighting Solutions, LLC (f/k/a GE Lighting Solutions, LLC) (American Industrial Partners)
• Original Assignee: Gelcore (General Electric Company)
• Inventors: Aanegola, Srinath K., Southard, Paul W., Petroski, James T.
• Primary Examiner(s): Reichard, Dean A.
• Assistant Examiner(s): Estrada, Angel R.
• Application Number:
  US09/866,581
• Publication Number:
  US 20020174995A1
• Time in Patent Office: 928 Days
• Field of Search: 174/50, 174/48, 174/53, 174/117.F, 174/117.FF, 174/88.R, 439/439, 439/425, 439/411, 439/412, 439/460, 439/98, 439/466, 439/419, 439/417, 439/280, 362/226, 362/249, 362/800, 362/239, 362/812, 405/50
• US Class Current: 362/640
• CPC Class Codes: F21S 4/20 with light sources held by or within elongate supports
• CPC Class Codes: F21V 21/002 making direct electrical contact, e.g. by piercing F21V21/35 takes precedence
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G09F 13/0404 the light source being enclosed in a box forming the character of the sign
• CPC Class Codes: G09F 13/0413 Frames or casing structures therefor
• CPC Class Codes: G09F 13/22 electroluminescent electroluminescent light sources per se H05B33/00
• CPC Class Codes: G09F 9/33 being semiconductor devices, e.g. diodes
• CPC Class Codes: Y10S 362/80 Light emitting diode
• CPC Class Codes: Y10S 362/812 Signs

Abstract

An LED light engine includes an electrical conductor, a flexible, electrically insulating covering surrounding the electrical conductor, and an LED. The electrical conductor includes a plurality of conductive elements. A connector is mechanically secured to the flexible insulating covering and electrically contacts the electrical conductor. In one embodiment, the LED electrically contacts the electrical conductor and is mechanically secured to the insulating covering. Alternatively, the LED electrically contacts the electrical conductor and is mechanically secured to the insulating covering via the connector.

Claims

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

an electrical cable including;

at least two flexible electrical conductors, and

a flexible, electrically insulating covering surrounding the electrical conductors, the conductors arranged substantially parallel with a selected separation therebetween, the flexible covering including a plurality of dips separated by the selected separation; and

an LED with a plurality of electrical leads separated by the selected separation and aligned with the dips which electrically contact the electrical conductors and mechanically pierce the insulating covering at the dips to mechanically secure the LED to the electrical cable.

2. The LED light engine as set forth in claim 1, wherein each of the conductors includes a plurality of strands and is about 14 gauge.

3. The LED light engine as set forth in claim 1, wherein each of the electrical leads is wedge-shaped.

4. The light emitting diode (LED) light engine as set forth in claim 1, wherein the at least two flexible electrical conductors include:

a positive flexible conductor and a negative flexible conductor,

wherein the leads of the LED include a positive lead and a negative lead that electrically contact the positive and negative conductors, respectively.

5. A method of manufacturing an LED channel letter, the method comprising:

insulating a plurality of parallel flexible conductive elements to form a generally flat flexible electrically insulating conductor;

mechanically securing a plurality of LEDs to spaced positions along the insulated conductive elements;

during the mechanical securing, electrically contacting a plurality of leads of each LED to respective ones of the conductive elements to form a parallel interconnection of the plurality of LEDs; and

fastening the generally flat flexible electrically insulating conductor in a channel letter housing with the generally flat flexible conductor positioned on-edge respective to a surface onto which the conductor is fastened.

6. The method of manufacturing an LED channel letter as set forth in claim 5, wherein:

the securing step includes;

mechanically attaching a connector to an insulating covering on the conductor; and

the contacting step includes;

passing an electrical contact, secured to the connector, through the insulating covering so that an electrical connection is made between the contact and a respective one of the conductive elements.

7. The method of manufacturing an LED channel letter as set forth in claim 6, wherein the electrical contact is V-shaped, the passing step including:

securing the conductive element within the V-shaped contact.

8. A channel letter comprising:

a substantially flat flexible cable including an electrically insulating sheath which contains positive and negative conductors electrically isolated from one another, the sheath providing a spacing between the positive and negative conductors;

a plurality of light emitting diode (LED) devices spaced apart from one another on the cable, each of the LED devices having an LED including positive and negative leads mounted on a connector which mechanically secures the LED device to a portion of the flexible cable and electrically connects the positive and negative LED leads to the positive and negative conductors through positive and negative conductive piercing members which pierce the sheath to make electrical contact with the respective conductors; and

a channel letter housing including a securing surface onto which the connectors of the LED devices are secured, the connectors being secured such that the substantially flat flexible cable is positioned on-edge with respect to the securing surface of the channel letter housing.

9. The channel letter as set forth in claim 8, wherein each connector includes:

a first connector section that receives the LED; and

a second connector section that snaps together with the first connector section to secure the connector to the flexible cable portion.

10. The channel letter as set forth in claim 8, wherein each conductive piercing member includes:

a bifurcated end defining a gap sized to receive the respective conductor.

11. The channel letter as set forth in claim 8, wherein each connector includes:

a first section that receives the LED; and

a second section;

wherein the first and second sections snap together with the flexible cable portion arranged therebetween to secure the connector to the flexible cable, the snapping causing the conductive piercing members to pierce the sheath and make electrical contact with the respective conductors.

12. The channel letter as set forth in claim 8, wherein the flexible electrical cable is flexible in a direction perpendicular to an axis defined by the spacing of the positive and negative conductors.

13. The channel letter as set forth in claim 8, wherein intervening cable portions between the spaced apart LED devices are selectively flexed to define a selected channel lettering.

14. The channel letter as set forth in claim 8, wherein the flexible cable includes first and second flexible cables, the flexible lighting device further including:

a splice connector that mechanically and electrically connects first and second flexible cables to make electrical contact with the respective conductors.

15. A channel letter including:

a substantially planar support surface;

a flexible conductor including;

a first flexible conductive element arranged in a first parallel plane that is parallel to the substantially planar support surface,

a second flexible conductive element arranged in a second parallel plane that is parallel to the substantially planar support surface, the second parallel plane being spaced from the first parallel plane by a spacing of the conductive elements, and

an insulating sheath covering the first and second flexible conductive elements; and

a plurality of light emitting diodes spaced along the conductor and secured to both the conductor and the support surface, the light emitting diodes receiving electrical power from the first and second flexible conductive elements.

16. A channel letter including:

an electrical cable including;

at least two flexible electrical conductors, and

a flexible, electrically insulating covering surrounding the electrical conductors, the conductors arranged substantially parallel with a selected separation therebetween, the flexible covering including a plurality of dips separated by the selected separation;

a plurality of LEDs, each LED having at least two electrical leads aligned with the dips, the at least two electrical leads electrically contacting the electrical conductors and mechanically piercing the insulating covering at the dips to mechanically secure the LED to the electrical cable; and

a channel letter housing inside of which the electrical cable is disposed.

17. The channel letter as set forth in claim 16, wherein each LED includes four electrical leads that electrically contact the electrical conductors and mechanically pierce the insulating covering at the dips to mechanically secure the LED to the electrical cable.

18. The channel letter as set forth in claim 16, wherein the at least two flexible electrical conductors define a flat cable plane, and the electrical cable is disposed in the channel letter housing positioned on-edge respective to a surface of the channel letter on which the electrical cable is disposed.