Vehicular lamp

Details Vehicular lamp Vehicular lamp

2006-08-01

2006-08-01

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices: systems

Special application

Vehicle

C307S010800, C315S276000

Reexamination Certificate

active

07084571

ABSTRACT:
There is provided a vehicular lamp that can flow an electric current having a predetermined variation ratio into each of a plurality of semiconductor light-emitting element units and can individually illuminate each of the plurality of semiconductor light-emitting element units. The vehicular lamp includes a first and a second semiconductor light-emitting element units that are connected to each other in parallel, a switching regulator transformer operable to supply electric power to the first and the second semiconductor light-emitting element units, a first secondary side transformer that magnetically couples a first power supply path from the switching regulator transformer to the first semiconductor light-emitting element unit and a second power supply path from the switching regulator transformer to the second semiconductor light-emitting element unit in order to regulate a current variation ratio between these paths, and a first switch operable to control whether the power is supplied to the first semiconductor light-emitting element unit, in which the first switch is provided at least on the first power supply path.

REFERENCES:
patent: 5568018 (1996-10-01), Muzic
patent: 6340868 (2002-01-01), Lys et al.
patent: 6867557 (2005-03-01), Ito et al.
patent: 2005/0269968 (2005-12-01), Ito et al.
patent: 2002-231013 (2002-08-01), None

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