Lamp unit comprising a shield having at least one light window

Patent metadata

Field	Value
Publication number	US-10101000-B2
Application number	US-201414776950-A
Country	US
Kind code	B2
Filing date	Apr 7, 2014
Priority date	Apr 9, 2013
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

A lighting unit for a headlight, in particular a motor vehicle headlight, having at least two light sources (1a, 1b), at least one reflector (2a, 2b), which delimits two light chambers (3a, 3b), a bezel (4), and a projection lens (5) having an optical axis (A), wherein a light chamber (3a) is arranged on an upper side and a light chamber (3b) is arranged on an underside of the bezel (4), wherein at least one light source (1a, 1b) is arranged within each of the light chambers (3a, 3b) and the bezel (4) extends substantially as far as a focal plane (E) of the projection lens (5) in order to produce a sharp light/dark boundary in a light exposure produced by the lighting unit, wherein the bezel (4) has at least one light window (7a, 7b), wherein at least one light path (8a, 8b, 8c, 8d) extends outwardly from a light chamber (3a, 3b), through the at least one light window (7a, 7b) and through the projection lens (5).

First claim

The invention claimed is:

1. A lighting unit for a motor vehicle headlight or other headlight, the lighting unit comprising:
at least two light sources ( 1 a , 1 b );
at least one reflector ( 2 a , 2 b ), which delimits two light chambers ( 3 a , 3 b );
a bezel ( 4 ); and
a projection lens ( 5 ) having an optical axis (A);
wherein a first light chamber ( 3 a ) of the two light chambers ( 3 a , 3 b ) is arranged on an upper side of the bezel ( 4 ) and a second light chamber ( 3 b ) of the two light chambers ( 3 a , 3 b ) is arranged on an underside of the bezel ( 4 ), wherein at least one light source ( 1 a , 1 b ) of the at least two light sources ( 1 a , 1 b ) is arranged within each of the two light chambers ( 3 a , 3 b ), wherein the bezel ( 4 ) extends substantially as far as a focal plane (E) of the projection lens ( 5 ) in order to produce a sharp light/dark boundary in a light exposure produced by the lighting unit, wherein the bezel ( 4 ) has at least one light window ( 7 a , 7 b ), wherein at least one first light path ( 8 a , 8 b , 8 c , 8 d ) extends outwardly from one of the two light chambers ( 3 a , 3 b ), through the at least one light window ( 7 a , 7 b ), and through the projection lens ( 5 ),
wherein the bezel ( 4 ) has at least two bezel portions ( 4 a , 4 b , 4 c ) delimiting the at least one light window ( 7 a , 7 b ), wherein at least one bezel portion ( 4 a , 4 b , 4 c ) of the at least two bezel portions ( 4 a , 4 b , 4 c ) is disposed at an angle relative to a longitudinal axis and has a reflective surface configured to deflect at least one second light path ( 8 a , 8 b , 8 c , 8 d ) in a direction of the optical axis (A) of the projection lens ( 5 ), wherein the at least one light window ( 7 a , 7 b ) comprises two light windows ( 7 a , 7 b ), wherein each of the two light windows ( 7 a , 7 b ) is assigned a light path ( 8 a , 8 b , 8 c , 8 d ), which extend outwardly through the two light windows ( 7 a , 7 b ) and through the projection lens ( 5 ),
wherein the bezel ( 4 ) has a first, a second, and a third bezel portion ( 4 a , 4 b , 4 c ), wherein the second bezel portion ( 4 b ) is formed in a lamella-like manner and a first light window ( 7 a ) for a first light path ( 8 a ) is formed between the first and the second bezel portion ( 4 a , 4 b ), and a second light window ( 7 b ) for a second light path ( 8 b ) is formed between the second and the third bezel portion ( 4 b , 4 c ), wherein the two light chambers ( 3 a , 3 b ) are arranged on the upper side and underside of the first bezel portion ( 4 a ).

2. The lighting unit of claim 1 , wherein the bezel ( 4 ) has a reflective surface, at least in part.

3. The lighting unit of claim 1 , wherein the at least one first light path ( 8 a , 8 b , 8 c , 8 d ) through the at least one light window ( 7 a , 7 b ) runs outwardly exclusively from the second light chamber ( 3 b ) located on the underside of the bezel ( 4 ), through the at least one light window ( 7 a , 7 b ), through the projection lens ( 5 ).

4. The lighting unit of claim 1 , wherein the at least one light window ( 7 a , 7 b ) is formed as a cutout in the bezel ( 4 ).

5. The lighting unit of claim 1 , wherein the at least one light window ( 7 a , 7 b ) comprises of a light-permeable dimensionally stable material.

6. The lighting unit of claim 1 , wherein the second bezel portion ( 4 b ) is designed to deflect the second light path ( 8 b ) in the direction of the optical axis (A) of the projection lens ( 5 ).

7. A motor vehicle comprising at least one lighting unit of claim 1 .

Assignees

• Zizala Lichtsysteme Gmbh
• Zkw Group Gmbh

Inventors

• Kieslinger Dietmar
• Altmann Johann

Classifications

• B60Q1/04

  the devices being headlights · CPC title

• F21S41/663

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

• F21S41/147 Primary

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

• F21S41/36

  Combinations of two or more separate reflectors · CPC title

• F21S41/365

  successively reflecting the light · CPC title