Scanner with battery
AssigneeElectronic Document Technology Pte. Ltd.
InventorsHin Leong Tan, Chang-Ming Liu, Cheng-Hsien Chang
Life of this patent
Estimating the term…
Abstract
Power is provided to a scanning device. Power supplied by an attached bus is used to power the scanning device when power requirements for the scanning device can be met by the power supplied by the attached bus. Power is drawn from a rechargeable battery to supply power to the scanning device when power requirements for the scanning device cannot be met by the power from the attached bus. When the scanning device is in a stand-by mode, the power from the attached bus is used to recharge the rechargeable battery.
Claims19
A scanning device, comprising:
- a bus interface for connection to a bus, the bus providing a power source for the scanning device;
- a motor used for moving media with respect to the scanning device;
- an image sensor used to scan the media;
- a rechargeable battery;
- and
- a charging circuitry;
- wherein the charging circuitry draws power from the bus and charges the rechargeable battery, the rechargeable battery supplying power to the motor and the image sensor whenever the scanning device requires power which exceeds a maximum power provided by the bus.
A method for providing power to a scanning device, the method comprising:
- using power supplied by an attached bus to power the scanning device when power requirements for the scanning device can be met by the power supplied by the attached bus;
- drawing power from a rechargeable battery to supply power to the scanning device when power requirements for the scanning device cannot be met by the power from the attached bus;
- and,
- using the power from the attached bus to recharge the rechargeable battery.
A scanning device, comprising:
- a rechargeable battery;
- means for receiving a power signal from a bus;
- means for scanning an image from media;
- means for selecting the power signal from the bus to provide power to the scanning device when the power requirements for the scanning device can be met by the power signal from the bus;
- means for selecting the rechargeable battery to provide power to the scanning device when the power requirements for the scanning device cannot be met by the power signal from the bus;
- and,
- means for recharging the battery from the power signal from the bus.
Dependencies are inferred from the claim text.