Portable USB device built with rechargeable functional apparatus
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United States of America Patent
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Sep 13, 2005
Grant Date -
Apr 22, 2004
app pub date -
Feb 4, 2003
filing date -
Oct 21, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A portable USB device built with rechargeable functional apparatus is disclosed. The portable USB device has a USB connector for being inserted into a socket of a host device. A USB device module is powered by the +5V pin on the USB connector and activated to perform data exchange via the D+ and D- pins on the USB connector when the USB connector is coupled to the host device, so as to provide a first specific function to the host device. A charge circuit charges the rechargeable battery via the +5V pin when the USB connector is coupled to the host device. A functional apparatus is powered by the rechargeable battery so as to provide second specific function different from the first one when the USB connector is not coupled to the host device.
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