Interface switching device and terminal using the same
US6763408B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 2000 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Mar 25, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/0382
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An interface switching device is connected to a keyboard unit and a computer. Two data lines, a power-supply line, and a ground line, which are provided at the interface switching device, are respectively connected to a data line, a clock line, a power-supply line, and a ground line, which are provided at the keyboard unit. An unused line is connected to an identification line. At the computer, the unused line, and the power-supply line or the ground line, are short-circuited. When the interface switching device is connected, a keyboard is notified of a voltage as identification information which is fixed at a power-supply voltage or zero volts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.