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1. (WO2018162222) LIGHTING DEVICE FOR A MOTOR VEHICLE

Pub. No.:    WO/2018/162222    International Application No.:    PCT/EP2018/054130
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Wed Feb 21 00:59:59 CET 2018
IPC: F21S 45/10
Applicants: BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT
Inventors: ERDL, Helmut
HANAFI, Abdelmalek
Title: LIGHTING DEVICE FOR A MOTOR VEHICLE
Abstract:
The invention relates to a lighting device for a motor vehicle, comprising a laser light source (2) consisting of a number of laser diodes and a vector scanner (3) on which falls at least one light bundle (L) from the light of the laser light source (2). During the operation of the lighting device (1), the vector scanner (3) changes the position of the at least one light bundle (L) and thereby moves a light spot (SP) produced from the at least one light bundle (L), at a distance from the lighting device (1), in order to generate a pre-determined light distribution. The scan speed at which the light spot (SP) is moved and/or the scan path along which the light spot (SP) is moved can be varied by the vector scanner (3). The vector scanner (3) comprises at least one MEMS component, respectively containing a semiconductor chip (5) that is surrounded by a housing (6) and comprises an individual mirror (7) on which at least one light bundle (L) of the at least one light bundle (L) falls. The MEMS component is designed such that the mirror (7) is continuously tilted in order to move the light spot (SP). A temperature sensor (8) is provided on a respective MEMS component, for detecting the temperature (T) of the respective MEMS component (4). Furthermore, the lighting device (1) comprises a control device (9) designed such that it controls the electrical power of the laser light source (2) and/or a cooling element arranged on the MEMS component according to the detected temperature (T) of the respective MEMS component, in such a way that the detected temperature (T) does not exceed a pre-determined temperature threshold value (TS).