The present disclosure provides a high-precision dimming circuit.A dimming circuit (107) includes an input stage (IN) and an output stage (OUT). The input stage (IN) includes a plurality of amplifiers (AMP1 to AMP3) which have non-inverted input terminals (+) thereof inputted with different dimming input voltages (DCDIM1, DCDIM2 and VH), respectively, and inverted input terminals (−) thereof inputted with a common dimming output voltage (V3). The output stage (OUT) is connected between respective output terminals of the plurality of amplifiers (AMP 1 to AMP3) and an output node of the diming output voltage (V3), and outputs, among the plurality of dimming input voltages (DCDIM1, DCDIM2 and VH) respectively inputted to the plurality of amplifiers (AMP1 to AMP3), a lowest voltage as the dimming output voltage (V3).
Dimming circuit
2022-01-18
Patent
Electronic Resource
English
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 / 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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