Patent ID: 8345322
Filing Date: 2013-01-01
Classification: A61P,H04N

Abstract:
1. A dual power mode apparatus for supplying power to a scanning apparatus to scan a plurality of document pages, the dual power mode apparatus comprising: a detection module, for receiving a first voltage signal and a second voltage signal of an universal serial bus (USB) signal, wherein the detection module detects the levels of the first voltage signal and the second voltage signal respectively for generating a detecting signal; a switch unit coupled to the detection module, for switching the first voltage signal and the second voltage signal; and a power controller coupled to the detection module, for receiving the detecting signal, wherein the power controller determines whether the first voltage signal is detected according the detecting signal, and wherein the power controller controls the switch unit to activate the switch unit to output the first voltage signal for driving an image acquiring device when the first voltage signal is detected; wherein the power controller determines whether the USB signal is disconnected from the scanning apparatus when the detection module detects the status of the first voltage signal to be changed and the power controller has a control entitlement of the first voltage signal and wherein the power controller transmits a re-connection request to allow a computer system, coupled to the power controller, to enumerate the scanning apparatus when the power controller disconnects the USB signal from the scanning apparatus.