Computer display switching circuit and method thereof

Details Computer display switching circuit and method thereof Computer display switching circuit and method thereof

1997-12-19

2000-03-14

Sheikh, Ayaz R.

Electrical computers and digital processing systems: support

Computer power control

G06F 100

Patent

active

060386703

ABSTRACT:
A computer display switching circuit employed in a computer system having an external display and a notebook computer having an internal display includes an external display sensor for checking the state of the external display connector to sense whether the external display is receiving an image signal, and an image signal output controller for controlling an image signal output according to the state sensed by the external display sensor. Accordingly, power to the external display connected to the notebook computer is turned on or off according to the opening and closing of the cover of the internal display of the notebook computer so as to avoid the need for a conventional keyboard hot key. Also, in the case that only an external display is used, the internal display is powered down. Therefore, unnecessary power consumption by the internal display is prevented.

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