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US 5,847,948 AGranted
Scanner power module
AssigneeCyberscan Technology, Inc.
InventorsJean-Marie Gatto, Thierry Brunet De Courssou
Life of this patent
Estimating the term…
Abstract
A circuit that provides all the power signals required to operate sheet-fed, flatbed, duplex and slides document scanners. The circuit accepts universal worldwide primary AC input or alternatively commonly found DC input and generates all the power supply outputs and power signals required by the scanner digital control electronics, analog electronics, image sensor electronics, light sources, stepper motors, auxiliary motors, solenoids and relays.
Claims34
A power conversion circuit for document scanners, comprising:
- at least one analog circuit power conversion and regulation circuit to provide at least one power source for document scanner analog circuits;
- at least one digital circuit power conversion and regulation circuit to provide at least one power source for document scanner digital circuits;
- at least one image sensor power conversion and regulation circuit to provide at least one power source for control circuits of at least one image sensor;
- at least one document feed motor power conversion and regulation circuit to provide at least one power source for at least one document feed motor;
- at least one light source power conversion and regulation circuit to provide at least one power source for at least one light source, comprising a light source controller circuit to provide safe and protected power signals to modulate an illumination intensity of the at least one light source, the at least one light source controller circuit being controlled by a low power control circuit;
- and
- a safe and isolated power source, the power conversion and regulation circuits drawing power from the safe and isolated power source,
- whereby, the power circuit provides all power sources and power signals required in documents scanners and hence offers an optimized power circuit solution to design document scanners.
5 more elements
An integrated power supply for document scanners, comprising:
- a primary AC to DC converter having an input connected to a domestic main alternating current power line, an output of the primary converter providing safe and isolated DC voltage;
- a first DC to DC converter for supplying at least one of motors, solenoids and relays with DC input voltage;
- a second DC to DC converter for supplying scanner analog electronics with regulated DC voltages;
- a third DC to DC converter for supplying scanner digital electronics with selected DC voltage levels;
- an LED light source controller for controlling at least one array of light emitting diodes;
- and
- a CCFL DC to AC controller for controlling at least one cold cathode fluorescent light of the scanner,
- wherein the first to third DC to DC converters, the LED light source controller and the CCFL DC to AC controller have their respective inputs connected to an output of the primary AC to DC converter,
- whereby the integrated power supply provides all power requirements of document scanners.
6 more elements
An integrated power supply for document scanners, comprising:
- a primary AC to DC converter having an input connected to a domestic main alternating current power line, an output of the primary converter providing safe and isolated DC voltage;
- a plurality of DC to DC converters for supplying at least one of motors, solenoids, relays, analog electronics and digital electronics with DC input voltage;
- a light source controller for controlling at least one light source of the scanner;
- and
- a DC to AC controller for controlling at least one of a cold cathode fluorescent light, an electro-luninescent screen and a filament light of the scanner,
- wherein each of the plurality of DC to DC converters, the light source controller and the DC to AC controller have their respective inputs connected to an output of the primary AC to DC converter,
- whereby the integrated power supply provides all power requirements of document scanners.
4 more elements
Dependencies are inferred from the claim text.