LED tubular lighting fixture

• US 8,115,393 B2
• Filed: 01/09/2009
• Issued: 02/14/2012
• Est. Priority Date: 01/09/2009
• Status: Expired due to Fees

• Current Assignee: Southgrove Road Trust A New York Trust
• Original Assignee: Andrew T. Neal, Timothy John Porter
• Inventors: Neal, Andrew T., Porter, Timothy John
• Primary Examiner(s): Ismail, Shawki S
• Assistant Examiner(s): Hammond, Crystal L
• Application Number:
  US12/351,569
• Publication Number:
  US 20100176724A1
• Time in Patent Office: 1,131 Days
• Field of Search: 315/32, 315/34, 315112-115, 315/36, 362/800, 362/313, 362/231, 362/235, 362/218, 362/219, 362/240, 362/249.01, 362/294, 362/545, 361/782, 361/783
• US Class Current: 315/36
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• 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]

Abstract

A tubular LED lighting fixture comprises: a heat sink shell; a printed circuit board supported on the shell and having an upper surface and a bottom surface, longitudinally extending laterally spaced wiring on the upper and bottom surfaces, and, transverse heat pipes running through the printed circuit board; a plurality of LEDs connected in series across the laterally spaced upper surface wiring and spacedly mounted along the printed circuit board; a high frequency electronic driver mounted in the shell and connected in series with the LEDs; voltage limiting devices mounted across the laterally spaced bottom surface wiring of the printed circuit board and in parallel with the LEDs; a lens bonded to the shell covering the printed circuit board for directing and delivering light from the LEDs, the shell and lens forming a tube for enclosing the LED bearing printed circuit board; the tube so formed having sealed ends to form a watertight fixture; and, input wires extending from the high frequency electronic driver through at least one of the tube sealed ends.

Claims

1. A tubular LED lighting fixture comprising:

a heat sink shell;

a printed circuit board having only its longitudinal edges supported on the shell and having

wiring on the board

a plurality of LEDs connected in series to the wiring and spacedly mounted along the printed circuit board;

openings in the printed circuit board spaced from the LEDs;

a high frequency electronic driver connected in series with the LEDs and adapted to be connected to a DC power source;

a plurality of voltage limiting devices connected to the wiring and a device in parallel with each of the LEDs; and

,

a lens bonded to the shell covering the printed circuit board for directing and delivering light from the LEDs,

the shell and lens forming a tube for enclosing the LED bearing printed circuit board, the tube forming a watertight fixture.

3. The fixture of claim 1 wherein the printed circuit board has longitudinally extending laterally spaced wiring on the bottom surface, the voltage limiting devices being mounted across the laterally spaced bottom surface wiring in parallel with the LEDs.

4. The fixture of claim 1 wherein the LEDs are surface mounted devices.

5. The fixture of claim 1 wherein the voltage limiting devices are Zener diodes.

6. The fixture of claim 1 wherein the high frequency electronic driver is mounted in the shell.

7. The fixture of claim 1 wherein the lens is transparent.

8. The fixture of claim 1 wherein the lens is opaque.

9. The lens of claim 1 wherein the lens has a wide angle of at least 120 degrees.

10. The fixture of claim 1 wherein the tube has sealed ends.

11. The fixture of claim 10 including input wires extending from the high frequency electronic driver through at least one of the tube sealed ends.

2. The fixture of claim l wherein the printed circuit board has an upper surface, longitudinally extending laterally spaced wiring on the upper surface, the plurality of LEDs being connected in series across the laterally spaced upper surface wiring.

12. A tubular LED lighting fixture comprising:

a heat sink shell;

a printed circuit board having only its longitudinal edges supported on the shell and having

an upper surface and a bottom surface,

longitudinally extending laterally spaced wiring on the upper and bottom surfaces

a plurality of LEDs connected in series across the laterally spaced upper surface wiring and spacedly mounted along the printed circuit board;

openings in the printed circuit board spaced from the LEDs;

a high frequency electronic driver mounted in the shell and connected in series with the LEDs;

a plurality of voltage limiting devices mounted across the laterally spaced bottom surface wiring of the printed circuit board and a device in parallel with each of the LEDs;

a lens bonded to the shell covering the printed circuit board for directing and delivering light from the LEDs,

the shell and lens forming a tube for enclosing the LED bearing printed circuit board;

the tube so formed having sealed ends to form a watertight fixture; and

,

input wires extending from the high frequency electronic driver through at least one of the tube sealed ends.