Scanner with battery
First Claim
Patent Images
1. A scanning device, comprising:
- an internal power bus;
a bus interface for connecting to an external host bus, the bus interface forwarding a power signal from the external host bus to the internal power bus when the external host bus is connected to the bus interface;
a motor used for moving media with respect to the scanning device;
an image sensor used to scan the media;
a rechargeable battery;
charging circuitry that draws power from the internal power bus and charges the rechargeable battery; and
a switch, separate from the charging circuitry, that connects the rechargeable battery to the internal power bus, the switch being turned on and allowing connection between the rechargeable battery and the internal power bus whenever the external host bus is connected to the bus interface and the switch being turned off and preventing connection between the battery and the internal power bus whenever the external host bus is not connected to the bus interface.
1 Assignment
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Accused Products
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.
6 Citations
15 Claims
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1. A scanning device, comprising:
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an internal power bus; a bus interface for connecting to an external host bus, the bus interface forwarding a power signal from the external host bus to the internal power bus when the external host bus is connected to the bus interface; a motor used for moving media with respect to the scanning device; an image sensor used to scan the media; a rechargeable battery; charging circuitry that draws power from the internal power bus and charges the rechargeable battery; and a switch, separate from the charging circuitry, that connects the rechargeable battery to the internal power bus, the switch being turned on and allowing connection between the rechargeable battery and the internal power bus whenever the external host bus is connected to the bus interface and the switch being turned off and preventing connection between the battery and the internal power bus whenever the external host bus is not connected to the bus interface. - View Dependent Claims (2, 3, 4, 5, 7, 9)
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6. A scanning device, comprising:
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an internal power bus; a bus interface for connection to an external host bus, the external host bus providing a power source for the internal power bus; a motor used for moving media with respect to the scanning device; an image sensor used to scan the media; a battery; a switch that connects the battery to the internal power bus, the switch being turned on and allowing connection between the battery and the internal power bus whenever the external host bus is connected to the bus interface and the switch being turned off and preventing connection between the battery and the internal power bus whenever the external host bus is not connected to the bus interface; and a step up voltage unit that increases signal voltage of a combined signal that is powered both from the bus and from the battery, the step up voltage unit increasing signal voltage of the combined signal before a resulting signal is applied to at least one of the motor and the image sensor. - View Dependent Claims (8)
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10. A scanning device, comprising:
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an internal power bus; a bus interface for connecting to an external host bus, the bus interface forwarding a first power signal at a first voltage from the external host bus to the internal power bus when the external host bus is connected to the bus interface; a motor used for moving media with respect to the scanning device; an image sensor used to scan the media; a controller that controls the motor and the image sensor; a battery for providing a second power signal at a second voltage, the second voltage being higher than the first voltage; a power input jack for connecting to an external power source to the internal power bus, the external power source forwarding a third power signal at a third voltage to the internal power bus when the external power source is connected to the power input jack, the third voltage being higher than the second voltage; a voltage step-up that steps up voltage on the internal power bus to produce a fourth power signal with a fourth voltage, the fourth voltage being higher than the third voltage; and
,a switch that connects the battery to the internal power bus, the switch being turned on and off by the controller. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification
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Current AssigneeElectronic Document Technology Pte., Ltd.
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Original AssigneeElectronic Document Technology Pte., Ltd.
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InventorsTan, Hin Leong, Liu, Chang-Ming, Chang, Cheng-Hsien
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Primary Examiner(s)RUTLAND WALLIS, MICHAEL
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Application NumberUS12/077,389Publication NumberTime in Patent Office1,667 DaysField of Search307/43, 307/87, 307/66, 307/52US Class Current307/52CPC Class CodesH02J 7/00 Circuit arrangements for ch...H02J 7/34 Parallel operation in netwo...H04N 1/00885 Power supply means, e.g. ar...H04N 1/00899 Detection of supply level o...H04N 1/00901 Using different supplies or...H04N 1/00904 Arrangements for supplying ...
