Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1997-10-28
1999-05-25
Wong, Peter S.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 56, 363 97, H02M 3335, H02M 324, H02H 7122
Patent
active
059074809
ABSTRACT:
The invention relates to reducing the power consumption of a display unit. In a system according to the invention, the power source (2) is switched off in the OFF mode, and only the processor control circuit (4) is in operation, in order to detect the occurrence of control signals (8). If the control circuit (4) detects a control signal, it switches an operating voltage to the microprocessor (6) from the energy supply (12) of the secondary circuit. Then the microprocessor starts the power source (2) and examines the state of the control signals (8). If the state of the control signals requires starting the system, the processor (6) starts switching the whole system into operation. The control circuit (4) can be very simple, and thus its power consumption is also very low. The power input of the control circuit can be implemented by means of passive components (22), such as large resistors, directly from the primary side.
REFERENCES:
patent: 5282122 (1994-01-01), Summer
patent: 5555167 (1996-09-01), Fujihashi
patent: 5675480 (1997-10-01), Stanford
patent: 5675485 (1997-10-01), Seong
Nokia Technology GmbH
Vu Bao Q.
Wong Peter S.
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