Lighting device for vehicle

Details Lighting device for vehicle Lighting device for vehicle

2006-09-12

2006-09-12

Tran, Thuy Vinh (Department: 2821)

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

C307S077000

Reexamination Certificate

active

07105945

ABSTRACT:
A lighting device for a vehicle comprises: a plurality of light source sections connected in parallel with each other; and a transformer for supplying an electric power to the plurality of light source sections. The transformer includes a primary coil and a plurality of secondary coils provided corresponding to the plurality of light source sections, for respectively supplying electric power to the corresponding light source sections. One end of each light source section is grounded and a semiconductor light emitting element is provided between one end and the other end of the light source section. The lighting device further comprises: a voltage detecting section for detecting voltages at the other ends of the plurality of light sources; and an output control section for controlling an electric current outputted from the transformer according to the voltage detected by the voltage detecting section.

REFERENCES:
patent: 4100476 (1978-07-01), Ghiringhelli
patent: 5349272 (1994-09-01), Rector
patent: 6847169 (2005-01-01), Ito et al.
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patent: 2002-231013 (2002-08-01), None
patent: 2003-187614 (2003-07-01), None
patent: 2003-317978 (2003-11-01), None
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Patent Abstracts of Japan, Publication No. 2003-317978, Publication Date Nov. 7, 2003, 2 pages.
Patent Abstracts of Japan, Publication No. 2003-187614, Publication Date Jul. 4, 2003, 2 pages.

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