Linear LED illumination system

• US 7,810,955 B2
• Filed: 07/19/2007
• Issued: 10/12/2010
• Est. Priority Date: 07/19/2007
• Status: Active Grant

• Current Assignee: Current Lighting Solutions, LLC (f/k/a GE Lighting Solutions, LLC) (American Industrial Partners)
• Original Assignee: Lumination LLC
• Inventors: Du, Shawn, Mayer, Mark, Mrakovich, Matthew S., Stimac, Tomislav
• Primary Examiner(s): O'Shea; Sandra L
• Assistant Examiner(s): McMillan; Jessica L
• Application Number:
  US11/780,154
• Publication Number:
  US 20090021936A1
• Time in Patent Office: 1,181 Days
• Field of Search: 362/294, 362/373, 362/800
• US Class Current: 362/294
• CPC Class Codes: F21S 2/005 of modular construction
• CPC Class Codes: F21S 4/28 rigid, e.g. LED bars
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 21/005 for several lighting devices in an end-to-end arrangement, i.e. light tracks
• CPC Class Codes: F21V 23/005 the substrate is supporting also the light source
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21V 5/043 the lens having cylindrical faces, e.g. rod lenses, toric lenses
• CPC Class Codes: F21V 7/005 with an elongated shape to cooperate with linear light sources
• CPC Class Codes: F21V 7/0091 using total internal reflection
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A linear LED light module and system includes a heat sink, a printed circuit board, a plurality of LEDs, a power supply housing, a flexible electrical conductor, a first electrical connector, a second electrical connector, and a power supply. The heat sink is elongated in an axial direction along a longitudinal axis that is parallel with a greatest dimension of the heat sink. The PCB is in thermal communication with the heat sink and includes circuitry. The plurality of LEDs mount to the PCB and are in electrical communication with the circuitry of the PCB. The power supply housing connects to the heat sink. The flexible electrical conductor includes at least two wires that are configured to accommodate an AC line voltage of at least 120 VAC. The first electrical connector is at a first end of the electrical conductor. The second electrical connector is at a second end of the electrical conductor. The second connector has a configuration that complements the first connector so that the second connector can connect to an associated adjacent first connector of an associated adjacent LED module to allow a plurality of similar LED modules to be mechanically and electrically connected to one another. The power supply is disposed in the power supply housing and in electrical communication with the circuitry of the PCB and the electrical conductor. The power supply is configured to receive the AC line voltage from the electrical conductor and to convert the received AC line voltage to a lower DC voltage for delivery to the circuitry of the PCB to drive the LEDs mounted on the PCB.

Claims

1. An elongate linear light emitting diode (LED) module comprising:

a heat sink elongated in an axial direction along a longitudinal axis that is parallel with a greatest dimension of the heat sink;

a printed circuit board (PCB) in thermal communication with the heat sink and including circuitry;

a plurality of LEDs mounted to the PCB and in electrical communication with circuitry of the PCB, the LEDs being spaced from one another in the axial direction;

a power supply housing connected to the heat sink;

a flexible electrical conductor including at least two wires and configured to accommodate an AC line voltage of at least 120 VAC;

a first electrical connector at a first end of the electrical conductor;

a second electrical connector at a second end of the electrical conductor, the second connector having a configuration that complements the first connector so that the second connector can connect to an associated adjacent first connector of an associated adjacent LED module to allow a plurality of similar LED modules to be mechanically and electrically connected to one another;

a power supply disposed in the power supply housing and in electrical communication with the circuitry of the PCB and the electrical conductor, the power supply configured to receive the AC line voltage from the electrical conductor and to convert the received AC line voltage to a lower DC voltage for delivery to the circuitry of the PCB to drive the LEDs mounted on the PCB; and

elongate barbs extending in the axial direction disposed on opposite sides of the power supply housing, the barbs being configured to engage an associated channel for mounting the LED module.

2. An elongate linear light emitting diode (LED) module comprising:

a printed circuit board (PCB) in thermal communication with the heat sink and including circuitry;

a heat sink elongated in an axial direction along a longitudinal axis that is parallel with a greatest dimension of the heat sink, wherein the heat sink is in thermal communication with PCB, wherein the heat sink includes an elongate channel extending in the axial direction having a first section that receives the PCB and a second section open to the first section and extending radially through the heat sink away from the first section;

a plurality of LEDs mounted to the PCB and in electrical communication with circuitry of the PCB, the LEDs being spaced from one another in the axial direction;

a power supply housing connected to the heat sink;

a flexible electrical conductor including at least two wires and configured to accommodate an AC line voltage of at least 120 VAC;

a first electrical connector at a first end of the electrical conductor;

a second electrical connector at a second end of the electrical conductor, the second connector having a configuration that complements the first connector so that the second connector can connect to an associated adjacent first connector of an associated adjacent LED module to allow a plurality of similar LED modules to be mechanically and electrically connected to one another; and

a power supply disposed in the power supply housing and in electrical communication with the circuitry of the PCB and the electrical conductor, the power supply configured to receive the AC line voltage from the electrical conductor and to convert the received AC line voltage to a lower DC voltage for delivery to the circuitry of the PCB to drive the LEDs mounted on the PCB.

3. The module of claim 2, further comprising an elongate optic elongated in the axial direction and received in the second section of the channel, the elongate optic having a high refractive index for internally reflecting light entering the optic from the LEDs and a high dispersion of reflected light.

4. The module of claim 3, wherein the heat sink includes reflective surfaces adjacent the second section of the channel, the reflective surfaces facing the optic for redirecting light that contacts the reflective surfaces back into the optic.

5. The module of claim 4, wherein the heat sink includes reflective surfaces adjacent the second section of the channel, the reflective surfaces facing the optic for redirecting light that contacts the reflective surfaces back into the optic.

6. The module of claim 2, further comprising an elongate optic elongated in the axial direction and received in the second section of the channel, the elongate optic being extruded and including a wave optic in the optic.

7. The module of claim 2, further comprising an elongate optic elongated in the axial direction and received in the second section of the channel.

8. The module of claim 7, wherein the first section of the channel is defined by an upper channel surface and a lower channel surface spaced from the upper channel surface, an upper surface of the PCB abuts the upper channel surface to provide a thermal path between the upper surface of the PCB and the upper channel surface.

9. The module of claim 8, wherein the power supply housing abuts against a lowermost surface of the heat sink, the lower channel surface being interposed between the upper channel surface and the lowermost surface of the heat sink.

10. The module of claim 9, wherein a lower surface of the PCB is spaced from the lower channel surface.

11. The module of claim 10, wherein the heat sink includes axially extending fins that radiate away from the channel.

12. An elongate linear light emitting diode (LED) module comprising:

a heat sink elongated in an axial direction along a longitudinal axis that is parallel with a greatest dimension of the heat sink;

a printed circuit board (PCB) in thermal communication with the heat sink and including circuitry;

a plurality of LEDs mounted to the PCB and in electrical communication with circuitry of the PCB, the LEDs being spaced from one another in the axial direction;

a power supply housing connected to the heat sink;

a flexible electrical conductor including at least two wires and configured to accommodate an AC line voltage of at least 120 VAC;

a first electrical connector at a first end of the electrical conductor;

a second electrical connector at a second end of the electrical conductor, the second connector including three receptacles, each being connected to a respective wire and configured to accommodate 120 VAC and further having a configuration that complements the first connector so that the second connector can connect to an associated adjacent first connector of an associated adjacent LED module to allow a plurality of similar LED modules to be mechanically and electrically connected to one another;

a power supply disposed in the power supply housing and in electrical communication with the circuitry of the PCB and the electrical conductor, the power supply configured to receive the AC line voltage from the electrical conductor and to convert the received AC line voltage to a lower DC voltage for delivery to the circuitry of the PCB to drive the LEDs mounted on the PCB; and

a protective sheath covering a portion each wire of the electrical conductor disposed outside of the power supply housing.

13. The module of claim 12, wherein the first electrical connector includes three prongs, each prong being connected to a respective wire and configured to accommodate 120 VAC.

14. A linear light emitting diode (LED) system comprising a plurality of interconnected LED modules, each module comprising:

an elongate heat sink defining a longitudinal axis running parallel to a greatest dimension of the heat sink, the heat sink including a channel extending through the heat sink from a first end to a second end along the longitudinal axis of the heat sink;

an optic elongated in a direction parallel to the longitudinal axis disposed in the channel;

a printed circuit board (PCB) elongated in a direction parallel to the longitudinal axis disposed in the channel and in thermal communication with the elongate heat sink, the PCB including circuitry;

a plurality of LEDs mounted to the PCB and in electrical communication with circuitry of the PCB, the LEDs being spaced from one another in a direction parallel to the longitudinal axis;

a power supply housing connected to a lowermost surface of the elongate heat sink;

a female electrical connector spaced from the power supply housing;

a male electrical connector spaced from the power supply housing, the male connector having a configuration that complements the female connector so that the male connector of a first LED module of the plurality of LED modules connects to a female connector of a second LED module of the plurality of LED modules to mechanically and electrically connect the first LED module to the second LED module;

a flexible electrical conductor having at least two wires interconnecting the female electrical connector and the male electrical connector, the flexible electrical conductor being configured to accommodate a line voltage of at least 120 VAC; and

a power supply disposed in the power supply housing and in electrical communication with the circuitry of the PCB and the electrical conductor, the power supply configured to receive the AC line voltage from the electrical conductor and to convert the received AC line voltage to a lower DC voltage for delivery to the circuitry of the PCB to drive the LEDs.

15. The system of claim 14, further comprising an electrical cord including a plug configured to plug into a conventional wall socket and an electrical connector configured to electrically and mechanically connect with at least one of the male electrical connector and the female electrical connector.

16. A linear LED light system comprising a plurality of LED modules wherein each module includes an integral power supply and a plurality of LEDs driven by the power supply, wherein the power supply is configured to receive AC line voltage and to deliver a lower DC voltage to the LEDs to drive the LEDs while allowing the AC line voltage to be delivered to an adjacent LED module.