A scanning light source 200A includes a semiconductor light source 212, and scans an instantaneous illumination spot SPT based on the output light of the semiconductor light source 212 in the horizontal direction of the light distribution. A lighting circuit 300J is capable of providing multi-gradation dimming of the amount of light provided by the semiconductor light source 212 at each scanning position in synchronization with the scanning of the scanning light source 200A. The lighting circuit 300J is switchable between the first mode in which the semiconductor light source 212 is controlled by pulse width modulation with a duty cycle that corresponds to the dimming ratio and the second mode in which the semiconductor light source 212 is turned off over the number of cycles that corresponds to the dimming ratio.


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    Title :

    VEHICLE LAMP AND ILLUMINATION METHOD


    Additional title:

    FAHRZEUGLAMPE UND BELEUCHTUNGSVERFAHREN
    LAMPE DE VÉHICULE ET PROCÉDÉ D?ÉCLAIRAGE


    Contributors:
    KAMIYA MISAKO (author) / OYAMA SANAE (author)

    Publication date :

    2024-06-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    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 / F21W Index-Schema in Verbindung mit den Unterklassen F21K, F21L, F21S und F21V, betreffend den Gebrauch oder Einsatz von Leuchten oder Beleuchtungssystem , INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K,  F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS / 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 / H05B ELECTRIC HEATING , Elektrische Heizung



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