Portable computer having magnetic switch

Details Portable computer having magnetic switch Portable computer having magnetic switch

2007-11-19

2009-02-17

Duong, Hung V (Department: 2835)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

C438S487000, C345S173000, C600S301000

Reexamination Certificate

active

07492583

ABSTRACT:
A portable computer having a display part and a main part includes a magnetic piece installed in the display part, a Hall sensor installed in the main part, a switch circuit, and a control terminal connected to a power supply of a back light module of the display part. The Hall sensor includes a power pin connected to a first DC power supply, an output pin, and a ground pin connected to ground. The output pin of the Hall sensor is connected to the control terminal and a second DC power supply via the switch circuit, when the display part is in a closed position, the Hall sensor senses the magnetic field of the magnetic piece and outputs a control signal to the switch circuit, the switch circuit receives the control signal and turns off the power supply of the back light module via the control terminal.

REFERENCES:
patent: 4339638 (1982-07-01), Lascelles et al.
patent: 2004/0042173 (2004-03-01), Tomioka
patent: 2005/0140280 (2005-06-01), Yamazaki et al.

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