Vehicular lamp

Details Vehicular lamp Vehicular lamp

2005-03-29

2005-03-29

Philogene, Haissa (Department: 2828)

Electric lamp and discharge devices: systems

Special application

Vehicle

C315S077000, C315S291000, C315S273000, C340S468000, C362S545000

Reexamination Certificate

active

06873111

ABSTRACT:
A vehicular lamp used in a vehicle, includes: a light source for emitting light in accordance with a voltage given thereto; a light-source controlling transistor for controlling power supplied to the light source by repeatedly switching whether or not the power is supplied to the light source; a capacitor having one end grounded and another end at which a potential is changed like a saw-tooth by charging and discharging of the capacitor; a capacitor controlling transistor for controlling a timing at which the charging and discharging of the capacitor is switched; and a comparator for comparing the potential at the other end of the capacitor to a reference voltage given thereto and controlling a timing at which the light-source controlling transistor is turned on or off and a timing at which the capacitor controlling transistor is turned on or off in synchronization with each other based on the comparison result.

REFERENCES:
patent: 3594720 (1971-07-01), Cane
patent: 5281949 (1994-01-01), Durley et al.
patent: 5838259 (1998-11-01), Tonkin
patent: 20040061450 (2004-04-01), Ito et al.
patent: 61-48836 (1986-04-01), None
patent: 2001-215913 (2001-08-01), None
Patent Abstracts of Japan Publication No. JP2001215913, Publication date Aug. 10, 2001, 1 page.

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