Light emitting diode license lamp with reflector

• US 6,758,587 B2
• Filed: 06/25/2001
• Issued: 07/06/2004
• Est. Priority Date: 06/25/2001
• Status: Expired due to Fees

• Current Assignee: Grote Industries Incorporated
• Original Assignee: Grote Industries Incorporated
• Inventors: Stephens, Newel L., Brooks, Timothy W.
• Primary Examiner(s): O'Shea, Sandra
• Assistant Examiner(s): Lee, Guiyoung
• Application Number:
  US09/888,971
• Publication Number:
  US 20020196638A1
• Time in Patent Office: 1,107 Days
• Field of Search: 362/497, 362/498, 362/499, 362/241, 362/247, 362/516, 362/545
• US Class Current: 362/497
• CPC Class Codes: B60Q 1/56 for illuminating registrations or the like , e.g. for licence plates

Abstract

An apparatus for illuminating a license plate includes a reflector, one or more light emitting diodes mounted on a substrate, all positioned within a housing. The light emitting diode or diodes project light directed at the reflector. The reflector has a surface geometry for redirecting the light through a window in the housing such that it substantially uniformly illuminates the license plate. The apparatus preferably does not include a lens. The apparatus may include a light emitting diode or diodes and a curved free form reflector. The apparatus may also include a plurality of reflectors or reflector segments, each corresponding to a light emitting diode.

Claims

1. An apparatus for illuminating a license plate of a vehicle, comprising:

a housing;

a reflector positioned within the housing;

a light emitting diode positioned within the housing;

wherein the light emitting diode projects light directed at the reflector, the reflector having a surface geometry for redirecting the light through a window in the housing such that it substantially uniformly illuminates the license plate; and

wherein the light emitting diode projects light in a direction substantially in the rear of the vehicle and the reflector redirects the light in a forward direction onto the license plate.

2. The apparatus of claim 1, further comprising a substantially transparent cover for the window of the housing.

3. The apparatus of claim 1, wherein the light emitting diode emits white light.

4. The apparatus of claim 1, further comprising an attachment member securing the housing to the vehicle near the license plate.

5. The apparatus of claim 1, wherein the light emitting diode is mounted on a substrate, the substrate being attached to an interior surface of the housing.

6. The apparatus of claim 5, further comprising an electrical circuit connected to the light emitting diode and a potting material to seal the electrical circuit and the light emitting diode.

7. The apparatus of claim 1, wherein the light emitting diode is one of a plurality of light emitting diodes and the reflector includes a plurality of corresponding reflector segments, each reflector segment redirecting light from the corresponding light emitting diode.

8. The apparatus of claim 1, wherein the reflector includes a parabolic reflector segment.

9. The apparatus of claim 1, wherein the reflector includes a free-form reflector segment.

10. The apparatus of claim 1, wherein the reflector is substantially smooth.

11. The apparatus of claim 1, wherein the reflector is integral with at least a portion of the housing.

12. The apparatus of claim 1, wherein the light emitting diode is one of a plurality of light emitting diodes.

13. The apparatus of claim 12, wherein there are three light emitting diodes, and wherein the reflector is one of three reflectors, each reflector corresponding to one of the three light emitting diodes.

14. The apparatus of claim 1, wherein the apparatus does not include a lens.

15. An apparatus for illuminating a license plate of a vehicle, comprising:

a light emitting diode;

a curved free form reflector;

a housing substantially enclosing the diode and the reflector,

wherein the reflector redirects light projected by the diode through a window in the housing toward the license plate;

wherein the apparatus does not include a lens; and

,

wherein the light emitting diode projects light in a direction substantially to the rear of the vehicle and the reflector redirects the light in a forward direction onto the license plate.

16. The apparatus of claim 15, further comprising a substantially transparent cover for the window of the housing.

17. The apparatus of claim 15, wherein the light emitting diode is one of a plurality of light emitting diodes.

18. The apparatus of claim 17, wherein the plurality of light emitting diodes emit different colors of light that cumulatively create white light.

19. The apparatus of claim 17, wherein the plurality of light emitting diodes are mounted on a substrate, the substrate being integral with at least a portion of the housing.

20. The apparatus of claim 17, further including a plurality of reflector segments, each reflector segment corresponding to one of the plurality of light emitting diodes.

21. The apparatus of claim 15, further comprising an attachment member securing the housing to the vehicle near the license plate.

22. The apparatus of claim 15, wherein substantially no light escapes the apparatus in a rearward direction.

23. An apparatus for illuminating a license plate of a vehicle, comprising:

a plurality of light emitting diodes mounted to a substrate;

a plurality of reflector segments, each reflector segment corresponding to one of the plurality of light emitting diodes;

a housing substantially enclosing the plurality of light emitting diodes and the plurality of reflector segments,

wherein each reflector segment redirects light projected by the corresponding one of the plurality of light emitting diodes through a window in the homing toward the license plate, the reflector segments being configured to substantially uniformly illuminate the license plate; and

wherein the light emitting diode projects light in a direction substantially to the rear of the vehicle and the reflector redirects the light in a forward direction onto the license plate.

24. The apparatus of claim 23, further comprising a substantially transparent cover for the window of the housing.

25. The apparatus of claim 23, further composing an attachment member securing the housing to the vehicle near the license plate.

26. The apparatus of claim 23, wherein the apparatus does not include a lens.

27. The apparatus of claim 23, wherein each reflector segment is an individual reflector.

28. The apparatus of claim 23, wherein the plurality of reflector segments are all part of one substantially smooth reflector.