Electric power cut-off detection unit for a monitor

Details Electric power cut-off detection unit for a monitor Electric power cut-off detection unit for a monitor

1995-10-27

1997-06-10

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 88, H02H 314

Patent

active

056382456

ABSTRACT:
Disclosed is an electric power cut-off detection unit for a monitor which has a full-wave rectifier for generating a first direct voltage, a second voltage generator for generating a second direct voltage, a third direct voltage generator for generating a third direct voltage, a fourth direct voltage generator for inputting the first and the third direct voltages and for outputting a fourth direct voltage according to an input of the first direct voltage, and microprocessor for inputting the third direct voltage as an operation voltage, monitoring the fourth direct voltage and for storing data concerning operation states of the monitor as safety measures according to the fourth direct voltage during inputting the third direct voltage on a power cut-off or a power failure. With such safety measures of microprocessor for the monitor, inconvenience for a user to readjust monitor's display states can be eliminated when a normal alternate electric power is resupplied and a prevention of a damage to the monitor can be achieved by eliminating a damage with a deflection circuit.

REFERENCES:
patent: 4733158 (1988-03-01), Marchione et al.
patent: 5430596 (1995-07-01), Hamaguchi et al.

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