Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Reexamination Certificate
2006-07-21
2008-10-28
Tran, Thuy Vinh (Department: 2821)
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
C315S082000
Reexamination Certificate
active
07443050
ABSTRACT:
To control individually a plurality of loads to be turned on by combining a switching regulator with a charge pump circuit using some of the components of the switching regulator. An LED is controlled to be turned on by a switching regulator having an NMOS transistor connected to a transformer and a control circuit for generating an on/off signal. An LED is controlled to be turned on by a charge pump circuit that shares the NMOS transistor and the control circuit with the switching regulator to charge a condenser with an electric charge during an operation for turning on the NMOS transistor and discharge the electric charge accumulated in the condenser during an operation for turning off the NMOS transistor. Thus, circuit structure is simplified.
REFERENCES:
patent: 4388559 (1983-06-01), Lefavour
patent: 5621623 (1997-04-01), Kuriyama et al.
patent: 5706185 (1998-01-01), Toyama et al.
patent: 7049762 (2006-05-01), Newton
patent: 2004-134146 (2004-04-01), None
Patent Abstracts of Japan, Publication No.: 2004-134146, Publication Date: Apr. 30, 2004 2 pages.
Ito Masayasu
Shiotsu Fuminori
Koito Manufacturing Co. Ltd.
Osha• Liang LLP
Tran Thuy Vinh
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