Motor Vehicle Headlight for Emitting a Long-Range Light Pattern

Patent metadata

Field	Value
Publication number	US-2019390833-A1
Application number	US-201916535554-A
Country	US
Kind code	A1
Filing date	Aug 8, 2019
Priority date	Sep 17, 2015
Publication date	Dec 26, 2019
Grant date	—

Abstract

A light module for a motor vehicle headlight for emitting light to form a light pattern in an area in front of the light module, the light module including two or more primary light sources (PLQ1, PLQ2) that produce light to form a main light pattern (HLV), and at least one secondary light source (SLQ1) that produces light to form an additional light pattern (ZLV), which overlaps the main light pattern to form an entire light pattern. The primary light sources are associated with at least one primary reflector (PR1, PR2) and are configured to bundle the light emitted the from the primary light sources and to direct it in the form of the main light pattern into an area in front of the light module. The at least one secondary light source is associated with an optical imaging system (AS) and is configured to project the light emitted from the at least one secondary light source in the form of the additional light pattern into an area in front of the light module, wherein the main light pattern is in the form of a short-range light pattern and the additional light pattern is in the form of a long-range light pattern and the entire light pattern (LFL) is in the form of a long-range light pattern.

First claim

1 . A light module for a motor vehicle headlight for emitting light to form a light pattern in an area in front of the light module, the light module comprising:
two or more primary light sources (PLQ 1 , PLQ 2 ) that produce light to form a main light pattern (HLV), and at least one secondary light source (SLQ 1 ) that produces light to form an additional light pattern (ZLV), wherein: the additional light pattern overlaps the main light pattern to form an entire light pattern, the primary light sources (PLQ 1 , PLQ 2 ) is associated with at least one primary reflector (PR 1 , PR 2 ) and is configured to bundle the light emitted the from the primary light sources (PLQ 1 , PLQ 2 ) and to direct it in the form of the main light pattern (HLV) into an area in front of the light module, an optical imaging system (AS) is associated with the at least one secondary light source (SLQ 1 ) and is configured to project the light emitted from the at least one secondary light source (SLQ 1 ) in the form of the additional light pattern (ZLV) into an area in front of the light module, and the main light pattern (HLV) is in the form of a short-range light pattern and the additional light pattern (ZLV) is in the form of a long-range light pattern and the entire light pattern (LFL) is in the form of a long-range light pattern.

2 . The light module according to claim 1 , wherein the at least one primary reflector (PR 1 , PR 2 ) is in the form of a paraboloidal reflector.

3 . The light module according to claim 1 , wherein the two or more primary light sources (PLQ 1 , PLQ 2 ) are in the form of LEDs.

4 . The light module according to claim 1 , wherein every primary light source (PLQ 1 , PLQ 2 ) is associated with exactly one primary reflector (PR 1 , PR 2 ).

5 . The light module according to claim 1 , wherein if there are two or more primary reflectors (PR 1 , PR 2 ), all primary reflectors are made together in a single piece.

6 . The light module according to claim 1 , wherein if there are two or more primary reflectors (PR 1 , PR 2 ), all primary reflectors are separate from one another.

7 . The light module according to claim 1 , wherein every primary light source (PLQ 1 , PLQ 2 ) is arranged at a focal point (PB 1 , PB 2 ) of the at least one primary reflector (PR 1 , PR 2 ).

8 . The light module according to claim 1 , wherein the at least one secondary light source (SLQ 1 ) is in the form of light conversion means of a laser light unit.

9 . The light module according to claim 1 , wherein the primary light sources (PLQ 1 , PLQ 2 ) are in the form of light sources of one type, preferably in the form of LEDs, and that the at least one secondary light source (SLQ 1 ) is in the form of a light source of another type, preferably in the form of light conversion means of a laser light unit.

10 . The light module according to claim 1 , wherein the optical imaging system (AS) has at least one secondary reflector (SLQ 1 ), preferably a free form reflector.

11 . The light module according to claim 1 , wherein the optical imaging system (AS) has at least one hyperboloid reflector (SR 1 ).

12 . The light module according to claim 11 , wherein the hyperboloid reflector (SR 1 ) has auxiliary optics (KL 1 ) in front of it.

13 . The light module according to claim 11 , wherein the hyperboloid reflector has a collimator lens (KL 1 ) in front of it, the at least one secondary light source (SLQ 1 ) preferably being arranged at a real focal point (BP 1 ) of the hyperboloid reflector (SR 1 ), and the focal point (KLB) of the collimator lens (KL 1 ) preferably coinciding with the virtual focal point (BP 2 ) of the hyperboloid reflector (SR 1 ).

14 . The light module according to claim 10 , wherein a secondary reflector focal length (HBW 1 ) is equal to the at least one primary reflector focal length (PBW 1 , PBW 2 ).

15 . The light module according to claim 14 , wherein if there are two or more primary reflectors, the primary reflector focal lengths (PBW 1 , PBW 2 ) are the same.

16 . The light module according to claim 1 , wherein an optical axis of the imaging system (SO 1 ) and an optical axis of the at least one primary reflector (PO 1 , PO 2 ) are oriented essentially parallel to one another.

17 . The light module according to claim 16 , wherein if there are two or more primary reflectors, all their optical axes (PO 1 , PO 2 ) are oriented parallel to one another and the optical axis of the imaging system (SO 1 ) is oriented essentially parallel to the optical axes of the primary reflectors.

18 . A light module according to claim 1 , wherein the primary light sources (PLQ 1 , PLQ 2 ) are arranged so that the at least one secondary light source (SLQ 1 ) is surround by the primary light sources (PLQ 1 , PLQ 2 )/arranged between the primary light sources (PLQ 1 , PLQ 2 ).

19 . A lighting device for a motor vehicle headlight comprising the light module according to claim 1 .

20 . The lighting device according to claim 1919 , wherein the lighting device has a supporting frame (TR), a main support (HT), and an additional support (ZT), the supporting frame (TR) being configured to receive the main support (HT) and the additional support (ZT), the main support (HT) being configured to receive the primary light sources (PLQ 1 , PLQ 2 ) and the at least one primary reflector (PR 1 , PR 2 ), and the additional support (ZT) being configured to receive the at least one secondary light source (SLQ 1 ) and the optical imaging system (AS).

21 . The lighting device according to claim 20 , wherein the main support (HT) and/or the additional support (ZT) are/is each in the form of a heat sink.

22 . The lighting device according to claim 20 , wherein the main support (HT) and the supporting frame (TR) are associated with at least one first adjustment triangle system (EDS 1 ) to adjust the main support (HT) with respect to the supporting frame (TR).

23 . The lighting device according to claim 20 , wherein the additional support (ZT) and the supporting frame (TR) are associated with at least one second adjustment triangle system (EDS 2 ) to adjust the additional support (ZT) with respect to the supporting frame (TR).

24 . The lighting device according to claim 20 , wherein the supporting frame (TR) is pivotable about at least one axis (TA).

25 . The lighting device according to claim 20 , wherein the supporting frame (TR) is arranged between the additional support (ZT) and the main support (HT).

26 . The lighting device according to claim 20 , wherein the supporting frame (TR) is arranged behind the main support (HT) and the additional support (ZT) is arranged behind the supporting frame (TR).

27 . The lighting device according to claim 20 , wherein the secondary light source (SLQ 1 ) is in the form of light conversion means of a laser light unit, and the laser light unit is arranged in a laser light unit housing (HM), this laser light unit housing (HM) being elongated and being arranged in and guidable through a receiving opening (AO) in the supporting frame (TR), this receiving opening being set up to receive the laser light unit housing.

28 . The lighting device according to claim 20 , wherein the supporting frame (TR) has at least three passages and that the main support (HT) has at least three receiving sockets, every receiving socket of the main support corresponding to one

Assignees

• Zkw Group Gmbh

Inventors

• Stein Martin
• Bemmer Christian
• Edletzberger Thomas
• Schragl Martin
• Schadenhofer Peter
• Ganzberger Jürgen
• Altmann Johann
• Zorn Jürgen

Classifications

• F21S41/141

  Light emitting diodes [LED] · CPC title

• F21S41/16

  Laser light sources · CPC title

• F21S41/32

  Optical layout thereof · CPC title

• F21S45/49

  Attachment of the cooling means · CPC title

• F21S41/60

  characterised by a variable light distribution · CPC title