Portable computer having universal serial bus ports controlled power supply and a method of the same
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United States of America Patent
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Feb 4, 2003
Grant Date -
N/A
app pub date -
Jul 23, 1999
filing date -
Jul 23, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A portable computer system with universal serial bus (USB) port or ports and a method for controlling power of the universal serial bus (USB) port is described. When the main power of the portable computer system is supplied from a battery rather than an alternating current (AC) adapter, the power of the universal serial bus (USB) port is automatically shut down. In addition, the power of the universal serial bus (USB ) port is completely shut down while the universal serial bus (USB) port is not used in response to a setting state of the universal serial bus (USB) port, thereby reducing unnecessary power consumption. Further, when an over-current is detected from the alternating current (AC) adapter or the battery, the power of the universal serial bus (USB) port is shut down, whereby damage to peripheral devices coupled to the universal serial bus (USB) port can be prevented.
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