A vehicle front lighting apparatus includes a lighting device array in which a plurality of lighting devices are connected in series, a plurality of bypass circuits, a plurality of switch elements, a lighting controller, a current value detector, a voltage value controller, and a disconnection determiner. The voltage value controller applies a voltage to the lighting device array, and controls a voltage value to be applied to cause a value of current flowing through the lighting device array to reach a predetermined target current value. The disconnection determiner determines that there is a disconnection in any of the bypass circuits when the number of the switch elements brought into the opened state does not match the controlled voltage value.
Vehicle front lighting apparatus
2021-06-15
Patent
Electronic Resource
English
IPC: | H05B ELECTRIC HEATING , Elektrische Heizung / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen / F21Y Index-Schema in Verbindung mit den Unterklassen F21K, F21L, F21S und F21V, betreffend die Form oder die Art der Lichtquellen oder die Farbe des emittierten Lichts , INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED |
Vehicle front lighting apparatus and disconnection detection method
European Patent Office | 2021
|VEHICLE FRONT LIGHTING APPARATUS AND DISCONNECTION DETECTION METHOD
European Patent Office | 2020
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