Portable lamp bank and lens assembly for use therewith

• US 8,313,211 B2
• Filed: 06/18/2009
• Issued: 11/20/2012
• Est. Priority Date: 07/23/2008
• Status: Active Grant

• Current Assignee: Autronic Plastics, Inc.
• Original Assignee: Autronic Plastics, Inc.
• Inventors: Libohova, Agjah, Arnold, Stephen C., Straw, Kimball
• Primary Examiner(s): Owens, Douglas W
• Assistant Examiner(s): HAMMOND, DEDEI KHALIEAH
• Application Number:
  US12/487,587
• Publication Number:
  US 20100019690A1
• Time in Patent Office: 1,251 Days
• Field of Search: None
• US Class Current: 362/217.01
• CPC Class Codes: F21L 14/023 having two or more, or different light sources
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21V 5/006 applied to portable lighting devices
• CPC Class Codes: H05B 45/34 Voltage stabilisation; Maintaining constant voltage
• CPC Class Codes: H05B 45/3574 Emulating the electrical or functional characteristics of incandescent lamps
• CPC Class Codes: H05B 45/36 Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
• CPC Class Codes: H05B 45/37 Converter circuits

Abstract

A portable lamp bank in accordance with an embodiment of the present application includes an elongated housing, a power source mounted in the housing and electrically connected to the external high voltage input voltage to provide a substantially constant driving voltage and a first light engine mounted in the elongated housing and electrically connected to the power source. The light engine includes a plurality of high output light emitting diodes that are driven based on the driving voltage of the power source to provide output light.

Claims

1. A portable lamp operable supplied by an external high voltage input voltage comprising:

an elongated housing;

a power source electrically connected to the external high voltage input voltage to provide a substantially constant driving voltage; and

a first light engine mounted in the elongated housing and electrically connected to the power source, the light engine further comprising;

a plurality of high output light emitting diodes that are driven based on the driving voltage of the power source to provide output light.

2. The portable lamp of claim 1, wherein the power source further comprises a rectifier circuit electrically connected to the high voltage input voltage to provide polarity independence in the power source.

3. The portable lamp of claim 2, further comprising a lens assembly, the light assembly including:

a plurality of lenslets, wherein a single lenslet is positioned over each high output light emitting diode of the plurality of high output light emitting diodes and is operable to reduce an emission angle of light collected from each high output light emitting diode; and

an outer lens, spaced away from the plurality of lenlets, wherein the outer lens is a prismatic lens operable to deflect and angularly shift a center of light beams from the lenslet.

4. The portable lamp of claim 3, wherein the outer lens further comprises a plurality of facets formed on an interior surface thereof to deflect light.

5. The portable lamp of claim 4, wherein the first light engine further comprises:

a printed circuit board operable for receiving the plurality of high output light emitting diodes and electrically connected to the power source to drive the plurality of high output light emitting diodes;

a heat sink thermally coupled to the printed circuit board to draw heat away from the high output light emitting diodes.

6. The portable lamp of claim 5, wherein the light engine further comprises a current control circuit electrically connected to the power source to receive the drive voltage and to provide a driving current to the plurality of high output light emitting diodes based on the driving voltage.

7. The portable lamp of claim 6, further comprising a gasket positioned between the outer lens and the heat sink to prevent moisture from entering the engine.

8. The portable lamp of claim 3, further comprising:

a first resilient bumper positioned at a first end of the elongated housing; and

a second resilient bumper positioned at a second end of the elongated housing, opposite the first end.

9. The portable lamp of claim 3, wherein the elongated housing is made of low smoke zero halogen plastic.

10. The portable lamp of claim 3, further comprising a power cable electrically connected to the power source to provide the external high voltage input voltage.

11. The portable lamp of claim 10, further comprising a bracket positioned on a rear of the elongated housing and operable to receive and store the power cable.

12. The portable lamp of claim 11, wherein the light engine further comprises a carrier, the carrier including two lenslets positioned at opposite ends of the carrier.

13. The portable lamp of claim 12, wherein the outer lens is formed as a single integrated piece and wherein the at least one carrier is operable for mounting in the outer lens such that the two lenslets of the at least one carrier cover two high output light emitting diodes.

14. The portable lamp of claim 13, wherein the light engine includes 6 high output light emitting diodes.

15. The portable lamp of claim 14, wherein each lenslet is made of a polycarbonate material.

16. The portable lamp of claim 15, wherein each lenslet has a thickness of 2.8 mm and a diameter of 10.0 mm.

17. The portable lamp of claim 3, wherein the external high voltage input voltage exceeds 277V.

18. The portable lamp of claim 3, wherein the plurality of high output light emitting diodes output light in excess of 1500 lumens.

19. A lens assembly for use in a portable lamp including a plurality of high output light emitting diodes, the lens assembly comprising:

a plurality of lenslets, wherein a single lenslet is positioned in front of each high output light emitting diode of the plurality of high output light emitting diodes, the single lenslet operable to reduce an emission angle of light collected from each high output light emitting diode; and

an outer lens, removably mounted in front of the plurality of lenslets and operable to deflect and angularly shift a center of light beams from the lenslet.

20. The lens assembly of claim 19, wherein the outer lens includes a plurality of facets formed on an inner surface thereof to direct light.

21. The lens assembly of claim 19, wherein the outer lens does not deflect light.

22. A light engine for use in a portable lamp including a power source providing a driving voltage and supplied by an external high voltage input voltage comprising:

a plurality of high output light emitting diodes;

a printed circuit board operable to electrically connect the power source to the plurality of light emitting diodes;

a control circuit operable to control a driving current provided to the plurality of light emitting diodes based on the driving voltage provided by the power source; and

an electromagnetic interference filter electrically connected with the power source and configured to minimize electromagnetic interference.

23. The light engine of claim 22, wherein the control circuit is integral with the printed circuit board.

24. The light engine of claim 23, wherein the control circuit is integral with the power source and separated from the printed circuit board.