Portable computer having magnetic switch
US7492583B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Nov 19, 2007 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Nov 19, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/9517
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.