A light emission drive device includes a current supply unit, which supplies driving current to a light emitting element, which performs light emission of a first function and light emission of a second function, a controller, which controls the driving current so as to have a current value depending on a dimming voltage, and a dimming voltage generator, which generates the dimming voltage. The dimming voltage generator applies a voltage, obtained according to the resistance value of a connected external resistor, to a voltage buffer, and controls the output voltage of the voltage buffer according to whether to perform light emission of any one of the first function and the second function so as to generate the dimming voltage.
LIGHT EMISSION DRIVE DEVICE AND VEHICLE LAMP
2018-11-29
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 / G05F SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES , Systeme zum Regeln elektrischer oder magnetischer Veränderlicher |
VEHICULAR LAMP EQUIPMENT, VEHICULAR LAMP EQUIPMENT SYSTEM, AND LIGHT-EMISSION DRIVE CIRCUIT
European Patent Office | 2017
|VEHICLE LAMP DRIVE DEVICE AND VEHICLE LAMP LIGHTING SYSTEM
European Patent Office | 2017
|LIGHT EMISSION ELEMENT DRIVE DEVICE, LIGHT EMISSION DEVICE, AND VEHICLE
European Patent Office | 2017
|