Headlamp module and headlamp assembly with internally reflecting translucent member

• US 7,513,665 B2
• Filed: 05/16/2006
• Issued: 04/07/2009
• Est. Priority Date: 05/16/2006
• Status: Expired due to Fees

• Current Assignee: Varroc Lighting Systems S.R.O. (Varroc Engineering Limited)
• Original Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Inventors: Chinniah, Jeyachandrabose, Eichelberger, Christopher L., Sayers, Edwin M.
• Primary Examiner(s): Ward; John A
• Application Number:
  US11/435,249
• Publication Number:
  US 20070268713A1
• Time in Patent Office: 1,057 Days
• Field of Search: 362/245, 362/308, 362/328, 362/507, 362/522, 362/545, 362/548
• US Class Current: 362/507
• CPC Class Codes: F21S 41/148 the main emission direction of the LED being perpendicular to the optical axis
• CPC Class Codes: F21S 41/151 arranged in one or more lines
• CPC Class Codes: F21S 41/322 the reflector using total internal reflection
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A headlamp module for a motor vehicle. The module includes a light source and a translucent member for internally reflecting the light rays so as to be directed. In one aspect of the invention, the light source is discretely positioned adjacent to a periphery defined by the exit surface so as to be directly hidden from view from the front of the vehicle. In another aspect, an outer surface of the light source is directly supported by the translucent member so that light rays emitted through an outer surface of the light source directly enter the translucent member.

Claims

1. A headlamp module for a motor vehicle comprising:

a light source configured to emit light rays; and

a translucent member having portions defining;

a support portion configured to support the light source so that the light rays are able to enter the translucent member, a reflection surface configured to internally reflect the light rays in a forward direction, and an exit surface configured to permit the light rays to pass therethrough so as to be emitted from the translucent member in the forward direction generally parallel to a light ray axis; and

the exit surface defining a periphery and the support portion is positioned with respect to the exit surface such that a projection of the support portion along a line parallel to the light ray axis is located adjacent to the periphery of the exit surface whereby the light source is discretely positioned with respect to the exit surface.

2. A headlamp module as in claim 1, wherein the translucent member includes a top surface and a bottom surface each intersecting the exit surface, the support portion being defined by the top surface.

3. A headlamp module as in claim 2, wherein the top surface is generally perpendicular to the exit surface.

4. A headlamp module as in claim 2, wherein a portion of the bottom surface is generally arcuate in shape.

5. A headlamp module as in claim 4, wherein at least a portion of the bottom surface is parabolic in shape.

6. A headlamp module as in claim 2, wherein the light source is positioned adjacent to a focus of the bottom surface and the top surface.

7. A headlamp module as in claim 2, the translucent member further including a first side surface and a second side surface intersecting the top surface, the bottom surface, and the exit surface, each of the first and second side surfaces including a tapered portion extending in a direction not parallel to the light ray axis.

8. A headlamp module as in claim 7, wherein the tapered portion of each of the first and second side surfaces is generally linear.

9. A headlamp module as in claim 7, wherein the tapered portion of each of the first and second side surfaces is generally arcuate.

10. A headlamp module as in claim 1, wherein the light source is configured to emit light rays through an outer surface thereof and the support portion engages at least a portion of the outer surface of the light source so that at least a portion of the light rays emitted through the outer surface of the light source are able to immediately enter the translucent member.

11. A headlamp module as in claim 1, wherein the translucent member includes a reflective coating defining at least a portion of one of the reflection surfaces.

12. A headlamp module as in claim 1, further comprising a second light source supported by a second support portion defined in the translucent member.

13. A headlamp module for a motor vehicle comprising:

at least one light source configured to emit light rays and including an outer surface through which the light rays are emitted; and

a translucent member having portions defining;

a support portion engaging at least a portion of the outer surface of the light source so that at least a portion of the light rays emitted through the outer surface of the light source enter the translucent member through the support portion;

a reflection surface configured to internally reflect the light rays in a forward direction, and

an exit surface configured to permit the light rays to pass therethrough so as to be emitted from the translucent member in the forward direction and generally parallel with each other.

14. A headlamp module as in claim 13, wherein the light source is a light emitting diode having a light emitting chip and a protective coating at least partially disposed around the light emitting chip so as to define at least a portion of the outer surface of the light source.

15. A headlamp module as in claim 14, wherein the support portion completely engages an outer surface of the protective coating.

16. A headlamp module as in claim 14, wherein the support portion engages the light emitting diode in a form-fitting engagement.

17. A headlamp module as in claim 16, the translucent member further including a top surface, a bottom surface, a first side surface and a second side surface each intersecting the top surface, the bottom surface, and the exit surface, wherein each of the first and second side surfaces includes a tapered portion extending in a direction not parallel to the light ray axis.

18. A headlamp module as in claim 17, wherein the bottom surface is parabolic in shape and the light source is positioned adjacent to a focus of the bottom surface.

19. A headlamp assembly for a motor vehicle comprising:

a plurality of headlamp modules cooperating to provide illumination for the motor vehicle, wherein at least one of the plurality of headlamp modules includes;

a light source configured to emit light rays; and

a translucent member having portions defining;

a support portion configured to support the light source so that the light rays are able to enter the translucent member, a reflection surface configured to internally reflect the light rays in a forward direction, and an exit surface configured to permit the light rays to pass therethrough so as to be emitted from the translucent member in the forward direction generally parallel to a light ray axis; and

the exit surface defining a periphery and the support portion is positioned with respect to the exit surface such that a projection of the support portion along a line parallel to the light ray axis is located adjacent to the periphery of the exit surface whereby the light source is discretely positioned with respect to the exit surface.

20. A headlamp assembly as in claim 19, wherein the translucent member includes a top surface and a bottom surface each intersecting the exit surface, the support portion being defined by the top surface.

21. A headlamp assembly in claim 20, wherein the light source is positioned adjacent to a focus of the bottom surface and the top surface.

22. A headlamp assembly a in claim 19, wherein the at least one of the plurality of headlamp modules is a trough module cooperating with at least one other trough module to define a set of trough modules.

23. A headlamp assembly as in aim 22, wherein the plurality of headlamp modules further includes a set of projector modules cooperating with the set of trough modules to generates a low beam.

24. A headlamp assembly as in claim 23, wherein the plurality of headlamp modules further includes a high beam module configured to generates a high beam and a turn signal module configured to generates a light signal beam.