Method and apparatus for using light emitting diodes for removing moisture

• US 8,410,402 B2
• Filed: 08/28/2007
• Issued: 04/02/2013
• Est. Priority Date: 08/28/2006
• Status: Active Grant

• Current Assignee: Dialight Corporation (Dialight PLC)
• Original Assignee: Dialight Corporation (Dialight PLC)
• Inventors: Burton, Thomas R.
• Primary Examiner(s): PELHAM, JOSEPH MOORE
• Assistant Examiner(s): Patel, Vinod D
• Application Number:
  US11/845,985
• Publication Number:
  US 20080047943A1
• Time in Patent Office: 2,044 Days
• Field of Search: 219/201, 219/202, 219/220, 219/522, 219/541, 219/497, 362/547, 362/92, 362/218, 362/230, 362/294
• US Class Current: 219/220
• CPC Class Codes: F21V 23/0442 activated by means of a sensor, e.g. motion or photodetectors
• CPC Class Codes: F21V 29/90 Heating arrangements
• CPC Class Codes: F21Y 2113/20 of different form
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A method and apparatus for removing moisture from a lighting apparatus is disclosed. In one embodiment of the present invention, the apparatus for removing moisture from a lighting apparatus includes at least one light emitting diode (LED) for outputting visible light and at least one LED for outputting infrared light to remove moisture from the housing.

Claims

1. An apparatus for removing moisture from a housing of a lighting apparatus, comprising:

at least one light emitting diode (LED) for outputting visible light;

at least one LED for outputting infrared light to remove moisture from said housing, wherein a number of the at least one LED for outputting infrared light is a function of an amount of heat needed to remove moisture from an outer surface of the housing of the lighting apparatus; and

a moisture sensor, wherein said moisture sensor triggers said at least one LED for outputting infrared light to turn on when said moisture sensor detects moisture on said housing.

2. The apparatus of claim 1, wherein said at least one LED for outputting visible light produces light wavelengths between 400 nanometers (nm) -700 nm.

3. The apparatus of claim 1, wherein said at least one LED for outputting infrared light produces light wavelengths greater than or equal to 750 nanometers.

4. The apparatus of claim 1, wherein said at least one LED for outputting infrared light produces radiant heat.

5. The apparatus of claim 1, wherein said LED for outputting infrared light is constructed from aluminum gallium arsenide.

6. The apparatus of claim 1, wherein said lighting apparatus comprises a traffic signal light.

7. The apparatus of claim 1, wherein said lighting apparatus comprises a beacon signal.

8. An apparatus for removing moisture from a housing of a lighting apparatus, comprising:

at least one means for outputting visible light;

at least one means for outputting infrared light to remove moisture from said housing, wherein a number of the at least one means for outputting infrared light is a function of an amount of heat needed to remove moisture from an outer surface of the housing of the lighting apparatus; and

a means for sensing moisture, wherein said means for sensing moisture triggers said means for outputting infrared light to turn on when said means for sensing moisture detects moisture on said housing.

9. The apparatus of claim 8, wherein said means for outputting visible light produces light wavelengths between 400 nanometers (nm) - 700 nm.

10. The apparatus of claim 8, wherein said means for outputting infrared light produces light wavelengths greater than or equal to 750 nanometers.

11. The apparatus of claim 8, wherein said at least one LED for outputting infrared light produces radiant heat.

12. The apparatus of claim 8, wherein said means for outputting infrared light is constructed from aluminum gallium arsenide.

13. A method for removing moisture from a housing of a lighting apparatus, comprising:

providing at least one light emitting diode (LED) for outputting visible light;

providing at least one LED for outputting infrared light to remove moisture from said housing, wherein a number of the at least one LED for outputting infrared light that is provided is a function of an amount of heat needed to remove moisture from an outer surface of the housing of the lighting apparatus;

sensing moisture on said housing; and

turning on said at least one LED for outputting infrared light to remove moisture from said housing in response to said sensing said moisture on said housing.