Computer system having a parallel port for its peripheral device

Details Computer system having a parallel port for its peripheral device Computer system having a parallel port for its peripheral device

1997-04-25

1999-06-08

Sheikh, Ayaz R.

39575003, 39575002, 39575006, 39575008, G06F 132

Patent

active

059110791

ABSTRACT:
A peripheral device in need of power supply connected to a parallel port of an expansion device linking the portable computer system, and to a parallel port of the portable computer system, which will be supplied power through the parallel port. In this computer system, the first parallel port must be installed and the second parallel port must be extended from the portable computer to the expansion device. And between the first and second parallel port, the first and the second peripheral device interconnection recognizing mechanism must be equipped to recognize the type of peripheral device. Also the first and the second power supply must be equipped to cut off or on the power to the peripheral device through the parallel port when the first and the second peripheral device interconnection recognizing mechanism give the recognizing signal. Furthermore the first power supply and the second power supply mechanism doesn't supply power when it recognizes that no peripheral device is connected to the first and second parallel port, or a peripheral device with no need of the power supply is connected. The first and the second power supply mechanism supplies power to a peripheral device through the first and second parallel port when it recognizes that a peripheral device in need of power supply is connected to the first parallel port and the second parallel port.

REFERENCES:
patent: 5359540 (1994-10-01), Ortiz
patent: 5408669 (1995-04-01), Stewart et al.
patent: 5423004 (1995-06-01), Porter
patent: 5438678 (1995-08-01), Smith
patent: 5457785 (1995-10-01), Kikinis et al.
patent: 5594672 (1997-01-01), Hicks
patent: 5603040 (1997-02-01), Frager et al.

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