Vehicle headlamp with laser for alignment of projected beam pattern, and method

• US 10,337,954 B2
• Filed: 04/27/2017
• Issued: 07/02/2019
• Est. Priority Date: 04/27/2017
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Helwig, Stephen Kenneth, Brown, David A., Curwood, Simon Howard, LaHaie, Diane Marie, Roosen, Matt W., Carroll, Brian, Ward, Ken Alan
• Primary Examiner(s): Negron, Ismael
• Application Number:
  US15/499,134
• Publication Number:
  US 20180312103A1
• Time in Patent Office: 796 Days
• Field of Search: 33288
• CPC Class Codes: B60Q 1/0683 Adjustable by rotation of a screw
• CPC Class Codes: F21S 41/19 Attachment of light sources or lamp holders achieving variable light distribution by movable light sources F21S41/657
• CPC Class Codes: G01M 11/062 using an indicator mounted on the head-light
• CPC Class Codes: G01M 11/064 by using camera or other imaging system for the light analysis
• CPC Class Codes: G01M 11/068 with part of the measurements done from inside the vehicle

Abstract

A vehicle headlamp includes a housing, at least one lamp located in the housing, at least one beam alignment light source positioned in the housing and configured to project an image to aid in alignment of the at least one lamp, and at least one beam alignment mechanism operably coupled to the housing and configured to adjust the direction of light from the at least one lamp based on an image projected by the beam alignment light source.

Claims

1. A vehicle headlamp comprising:

a housing;

one or more lamps located in the housing;

a beam alignment light source positioned in the housing and configured to aid in alignment of the one or more lamps;

a light source aperture positioned in-line with a travel path of light emitted from the beam alignment light source, the light source aperture equipped with an image filter; and

a beam alignment mechanism operably coupled to the housing and configured to adjust the direction of light from at least one of the one or more lamps.

2. The vehicle headlamp of claim 1, further comprising:

a housing bezel positioned about a perimeter of the housing.

3. The vehicle headlamp of claim 1, wherein the beam alignment light source is a laser.

4. The vehicle headlamp of claim 1, wherein the image filter interferes with at least some of the light emitted by the beam alignment light source.

5. The vehicle headlamp of claim 4, wherein the image filter diffracts light emitted by the beam alignment light source such that a horizontal line and a vertical line are projected from the beam alignment light source.

6. The vehicle headlamp of claim 5, wherein the horizontal line and the vertical line cross near a mid-point of the horizontal and vertical lines such that a cross-hair is projected from the beam alignment light source.

7. A vehicle headlamp comprising:

a low-beam housing;

one or more low-beam lamps;

one or more high-beam lamps;

a low-beam alignment mechanism operably coupled to the low-beam housing;

a low-beam alignment light source positioned in the low-beam housing;

a low-beam housing bezel positioned about a perimeter of the low-beam housing; and

a low-beam alignment light source aperture in the low-beam housing positioned in-line with a travel path of light emitted from the low-beam alignment light source.

8. The vehicle headlamp of claim 7, wherein the low-beam light source aperture is in the low-beam housing bezel.

9. The vehicle headlamp of claim 7, further comprising:

a high-beam housing.

10. The vehicle headlamp of claim 9, further comprising:

a high-beam housing bezel positioned about a perimeter of the high-beam housing.

11. The vehicle headlamp of claim 10, further comprising:

a high-beam alignment mechanism operably coupled to the high-beam housing.

12. The vehicle headlamp of claim 11, further comprising:

a high-beam alignment light source positioned in the high-beam housing.

13. The vehicle headlamp of claim 12, further comprising:

a high-beam light source aperture in the high-beam housing positioned in-line with a travel path of light emitted from the high-beam alignment light source.

14. The vehicle headlamp of claim 13, wherein the high-beam light source aperture is equipped with an image filter that interferes with at least some of the light emitted by the high-beam alignment light source.

15. The vehicle headlamp of claim 14, wherein the image filter diffracts light emitted by the high-beam alignment light source such that a horizontal line and a vertical line are projected from the high-beam alignment light source.

16. The vehicle headlamp of claim 15, wherein the horizontal line and the vertical line cross near a mid-point of the horizontal and vertical lines such that a cross-hair is projected from the high-beam alignment light source.

17. A method of aligning a vehicle headlamp comprising the steps of:

illuminating an alignment light source within the vehicle headlamp;

projecting the illuminated alignment light source onto a surface;

aligning the alignment light source to a pre-determined position on the surface;

adjusting one or more lamps to correspond with the pre-determined position of the alignment light source; and

utilizing an on-board vehicle camera to evaluate the alignment of the vehicle headlamp.

18. The method of aligning a vehicle headlamp of claim 17, further comprising the step of:

illuminating the one or more lamps after the step of aligning the alignment light source to a pre-determined position on the surface has been completed.

19. The method of aligning a vehicle headlamp of claim 17, wherein the step of projecting the illuminated alignment light source onto a surface further comprises:

projecting the illuminated alignment light source through an image filter, wherein the illuminated alignment light source is a laser.

20. The method of aligning a vehicle headlamp of claim 17, wherein manipulation of the alignment light source is translated into simultaneous manipulation of the one or more lamps such that the step of aligning the alignment light source to a pre-determined position on the surface and the step of adjusting one or more lamps to correspond with the pre-determined position of the alignment light source are performed simultaneously.