A solid-state light source lighting device includes an adjuster configured to adjust an output current to be output through an output port, and a first switch to be electrically connected in parallel with a second LED of a plurality of solid-state light sources, and a controller configured to turn on and off the first switch. The controller is configured to keep the first switch off while the DC voltage (input voltage) received through the input port is higher than a threshold voltage, and keep the first switch on while the input voltage is lower than or equal to the threshold voltage. The threshold voltage is higher than or equal to a voltage necessary to turn on the plurality of solid-state light sources while the first switch is off.
Solid-state light source lighting device, luminaire, vehicle lamp, and two-wheeled vehicle
2019-05-14
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 / B62J Fahrrad- oder Motorradsättel oder -sitze , CYCLE SADDLES OR SEATS |
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