Lighting control unit for vehicle lighting fixture

Details Lighting control unit for vehicle lighting fixture Lighting control unit for vehicle lighting fixture

2007-11-27

2007-11-27

Nguyen, Matthew V. (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C315S291000

Reexamination Certificate

active

11346675

ABSTRACT:
In a process where the energy accumulated in the transformer while a transistor is turned ON is emitted to an output circuit and an LED is illuminated with the emitted energy, a voltage generated across a resistor is monitored by a control circuit. When the current flowing through the transistor has reached a limit current value, the ON operation of the transistor is limited. When the output voltage of the output circuit has exceeded a first set voltage, the limit current value is lowered and the ON operation of the transistor is further limited. When the output voltage of the output circuit has exceeded a second set voltage, the ON operation of the transistor is forcibly stopped.

REFERENCES:
patent: 5901051 (1999-05-01), Takahashi et al.
patent: 6445598 (2002-09-01), Yamada
patent: 6784626 (2004-08-01), Otake et al.
patent: 7158391 (2007-01-01), Hatakeyama
patent: 20002-8409 (2002-01-01), None
Patent Abstracts of Japan, Publication No.: 2002-008409, Publication Date: Jan. 11, 2002, 1 page.

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