To provide a vehicle lightning appliance capable of implementing cost reduction and downsizing while satisfying regulation requirements.SOLUTION: A vehicle lightning appliance includes: a lightning circuit 1 for supplying input current; a first light emission element group LDm; a second light emission element group LDn provided in parallel with the first light emission element group LDm; and a load changeover circuit 3 for changing over a supply destination of the input current supplied from the lightning circuit 1 to either one of the first light emission element group LDm and the second light emission element group LDn. The load changeover circuit 3 includes: a PWM control unit for outputting a PWM control signal for controlling the lightning circuit 1; and a delay circuit that on the basis of the PWM control signal output from the PWM control unit, delays changeover timing at which changeover to either one of the first light emission element group LDm and the second light emission element group LDn is to be performed.SELECTED DRAWING: Figure 1
【課題】法規要件を満たしつつ、コスト削減及び小型化を実現することができる車両用灯具を提供する。【解決手段】入力電流を供給する点灯回路1と、第1の発光素子群LDmと、第1の発光素子群LDmとは並列に設けられている第2の発光素子群LDnと、点灯回路1から供給される入力電流の供給先を、第1の発光素子群LDm及び第2の発光素子群LDnの何れか一方に切り替える負荷切替回路3と、を含む。負荷切替回路3は、点灯回路1を制御するPWM制御信号を出力するPWM制御部と、PWM制御部から出力されるPWM制御信号に基づき、第1の発光素子群LDm及び第2の発光素子群LDnの何れか一方に切り替える切替タイミングを遅延させる遅延回路と、を含む。【選択図】図1
VEHICLE LIGHTING APPLIANCE
車両用灯具
2019-12-05
Patent
Electronic Resource
Japanese
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 |