Headlamp system for motor vehicles

Patent metadata

Field	Value
Publication number	US-9366405-B2
Application number	US-201414294275-A
Country	US
Kind code	B2
Filing date	Jun 3, 2014
Priority date	Nov 22, 2013
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A projector headlamp includes light sources, a cooling system and reflector comprising an upper part with a first focal point and second focal point and a lower part with a first focal point and second focal point. The headlamp also includes an aperture with a cutoff edge proximate an optical axis of the headlamp and a convergent lens. The convergent lens includes at least two segments with their own first focal points, the first segment in a lower part of the convergent lens has a greater optical power than a second segment in an upper part, the first focal points of the segments located near the optical axis of the headlamp between the light sources and the lens. The light sources comprise at least two light sources, a first adjoins the first focal point of the upper part and a second adjoins the first focal point of the bottom part.

First claim

The invention claimed is:

1. A projector headlamp, comprising:
a system of light sources;
a cooling system;
a reflector comprising:
an upper part with a first focal point and with a second focal point, and
a lower part with a first focal point and with a second focal point;

an aperture arranged with its cutoff edge in proximity to an optical axis of the headlamp; and
a convergent lens comprising at least two segments with their own first focal points, wherein a first segment situated in a lower part of the convergent lens has a greater optical power than a second segment situated in an upper part of the convergent lens, and the first focal points of the individual segments of the convergent lens are located near the optical axis of the headlamp between the light sources and the convergent lens, wherein the system of light sources comprises at least two light sources, where a first light source adjoins the first focal point of the upper part of the reflector and a second light source adjoins the first focal point of the bottom part of the reflector, and also the first focal point of the first segment of the convergent lens is adjacent to a cutoff edge of the aperture or aperture in a first position and the first focal point or points of the second or other segments of the convergent lens lie outside a region of the first focal point of the first segment behind and beneath the first focal point of the first segment of the convergent lens in the direction of the path of light rays from the reflector to the lens, and the second focal point of the upper part of the reflector is adjacent to the first focal point of the first segment of the convergent lens and the second focal point of the bottom part of the reflector is adjacent to the first focal point of the first segment or the first focal point of the second segment of the converging lens.

2. The headlamp according to claim 1 , wherein the first light source or the second light source comprise at least one light-emitting element.

3. The headlamp according to claim 1 , wherein the upper part or the lower part of the reflector comprise at least one reflector segment.

4. The headlamp according to claim 1 , wherein the upper part or the lower part of the reflector or the reflector segments or the light sources are separated by a body of a cooler of the light system.

5. The headlamp according to claim 1 , wherein a front side or a rear side of the convergent lens comprises two or more segments, each with a different optical power and different first focal points.

6. The headlamp according to claim 1 , wherein a front or a rear optical surface of the convergent lens is described by an analytical function or has a spherical or general profile.

7. The headlamp according to claim 1 , wherein an overall external form of the convergent lens is planoconvex, biconvex or concavoconvex.

8. The headlamp according to claim 1 , wherein the aperture of the convergent lens has a circular or non-circular stylistic shape.

9. The headlamp according to claim 1 , wherein the exit side of the convergent lens has a controlled microtexture.

10. The headlamp according to claim 1 , wherein the aperture is movable or immovable nature in implementing lighting functions.

11. The headlamp according to claim 1 , wherein the movable aperture has a flat or three-dimensional shape.

12. The headlamp according to claim 1 , wherein the aperture has a three-dimensional capability of adjusting a nominal position with respect to other parts of the projector headlamp.

13. The headlamp according to claim 1 , wherein the immovable or movable aperture has at least a partly absorptive or partly mirror metallization.

14. The headlamp according to claim 1 , wherein the convergent lens or the upper part of the reflector or the lower part of the reflector and/or the body of the cooler contain at least one other optical element for lighting of a vertical road or for lighting other desired areas of the roadway space.

Assignees

• Varroc Lighting Systems Sro

Inventors

• Barta Ondrej
• Chmela Radek
• Kreml Tomas
• Straka Petr

Classifications

• F21S41/689

  Flaps, i.e. screens pivoting around one of their edges · CPC title

• F21S45/47

  Passive cooling, e.g. using fins, thermal conductive elements or openings · CPC title

• F21S41/36

  Combinations of two or more separate reflectors · CPC title

• F21S41/147 Primary

  the main emission direction of the LED being angled to the optical axis of the illuminating device · CPC title

• F21S41/663

  by switching light sources (by switching incandescent light sources F21S41/162) · CPC title