LED spotlight

• US 20080198615A1
• Filed: 12/19/2007
• Published: 08/21/2008
• Est. Priority Date: 07/07/2003
• Status: Active Grant

• Current Assignee: Alltemp Products Company Limited (DiversiTech Holdings, Inc.)
• Original Assignee: Brasscorp Limited
• Inventors: Klipstein, Donald L.
• Granted Patent: US 7,798,667 B2
• Time in Patent Office: Days
• US Class Current: 362/538
• CPC Class Codes: B60Q 1/0483 mounted on a bracket, e.g. details concerning the mouting of the lamps on the vehicle body
• CPC Class Codes: B60Q 1/245 Searchlights, e.g. adjustable from within the vehicle adjustable headlights B60Q1/06
• CPC Class Codes: F21L 4/005 the device being a pocket lamp F21L4/022, F21L4/045, F21L4/085 take precedence
• CPC Class Codes: F21L 4/027 the light sources being a LED
• CPC Class Codes: F21L 4/06 with the light source coupled to the remainder of the device solely by cable
• CPC Class Codes: F21S 45/47 Passive cooling, e.g. using fins, thermal conductive elements or openings
• CPC Class Codes: F21V 23/0414 specially adapted to be used with portable lighting devices
• CPC Class Codes: F21V 27/00 Cable-stowing arrangements structurally associated with lighting devices, e.g. reels storing lengths of cable in general B65H; the lighting devices being vehicle headlamps F21S41/192; the lighting devices being vehicle lights F21S43/195
• CPC Class Codes: F21V 27/02 Cable inlets
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21V 7/0008 providing for indirect lighting
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G01N 21/643 non-biological material
• CPC Class Codes: G01N 21/8806 Specially adapted optical and illumination features
• CPC Class Codes: G01N 2201/0221 Portable; cableless; compact; hand-held
• CPC Class Codes: G01N 2201/0693 Battery powered circuitry
• CPC Class Codes: H05B 45/32 Pulse-control circuits
• CPC Class Codes: H05B 45/345 Current stabilisation; Maintaining constant current
• CPC Class Codes: H05B 45/38 : using boost topology

Abstract

LED lamp has LEDs aimed rearwards with either a concave mirror to the rear of each LED, or one concave mirror to the rear of two or more LEDs, collecting the light from the LEDs to form a forward projecting beam. LEDs may be high power types that require heatsinking. LED lamp may have a lens forward of each LED to collimate the radiation produced by the LEDs into a beam, where at least one lens has at least one aspheric curved surface. LED lamp may have a transparent reflective optic to collimate the radiation produced by each LED into a beam. LEDs mounted to heatsink mount with spokes and ring to support LEDs in place above mirror and conduct away heat.

Claims

1. An LED spotlight comprising:

a housing, an LED and a reflector within the housing, and a handle that protrudes from the housing, wherein the reflector is to collimate light from the LED into a beam, wherein the reflector has a focal length, and wherein the reflector has a diameter within a range from 3 to 12 inches to produce intense illumination of a relatively small area at a distance many times the focal length of the reflector and beyond.

2. The LED spotlight of claim 1 wherein the reflector has a diameter within a range from 4.5 to 7 inches.

3. The LED spotlight of claim 1 wherein the reflector has a large ratio of depth to diameter such that the reflector reflects a large percentage of light produced by the LED into the beam.

4. The LED spotlight of claim 3 wherein the reflector is paraboloidal.

5. The LED spotlight of claim 4, wherein the LED spotlight is suitable for mounting to a vehicle to direct the beam away from the vehicle.

6. The LED spotlight of claim 1, wherein the LED and the reflector face forward in the direction of the beam.

7. The LED spotlight of claim 1, wherein the LED faces rearward toward the reflector and the reflector faces forward in the direction of the beam.

8. The LED spotlight of claim 7 further comprising:

a heatsink mount to which the light emitting diode is mounted within the housing, the heatsink mount comprising a plurality of spokes extending radially away from the LED toward the housing to support the at least one LED in the housing in place above the reflector and to conduct heat from the LED.

9. An LED spotlight comprising:

a housing, a plurality of LEDs and a plurality of reflector elements within the housing, and a handle that protrudes from the housing, wherein each reflector element is associated with a respective LED to collimate light from the LEDs into a beam, wherein the reflector elements have a focal point, and wherein the reflector elements together produce intense illumination of a relatively small area at a distance many times the focal length of the reflector elements and beyond.

10. An LED lamp, comprising:

a) a head section that contains at least one light emitting diode that emits radiation, and contains at least one concave reflector, wherein the at least one light emitting diode is aimed rearwards towards the at least one concave reflector for receiving and collimating a majority of the rearwardly directed radiation into a beam, and

b) a handle section such that the lamp can be hand held,

wherein the head section further contains a heatsink mount to which the at least one light emitting diode is mounted, the heatsink mount comprising a plurality of spokes extending radially away from the at least one LED toward the head section to support the at least one LED in the head section in place above the reflector and to conduct heat from the at least one LED.

11. The LED lamp of claim 10, wherein the spokes are equally spaced radially about the at least one LED.

12. The LED lamp of claim 11, wherein the heatsink mount further comprises:

an annular ring at which the spokes terminate, the ring held in place in the head section by rib extending inwardly from the head section.

13. The LED lamp of claim 11 wherein the heatsink mount comprises at least three spokes.

14. The LED lamp of claim 10, wherein the LED is a white LED.

15. A lamp, comprising:

a) a head section that contains one or more light emitting diodes,

b) a handle section such that the inspection lamp can be hand held,

e) and a lens forward of each of said light emitting diodes to collimate the exciting radiation into a beam,

wherein the lens forward of at least one light emitting diode is aspheric.

16. The LED lamp of claim 15, wherein the one or more LEDs produce radiation suitable for exciting fluorescent materials.

17. The LED lamp of claim 15, wherein the one or more LEDs are white LEDs.

18. The LED lamp of claim 17, wherein more than one LED and more than one associated lens produce beams, and wherein the LEDs and associated lenses are arranged to have the beams merge together at a finite distance forward of the LED lamp.

19. An inspection lamp suitable for the detection of visibly fluorescent materials, the lamp comprising:

an LED that produces radiation suitable for causing fluorescence of said fluorescent materials, wherein the LED is a side emitting type, and further comprising a reflector to collimate the radiation produced by said LED into a beam.

20. The inspection lamp of claim 19, further comprising:

at least one lens forward of the reflector, wherein the reflector and lens in combination collimate the radiation produced by the LED into a beam.