Wireless add-on keyboard system and method
US6133833A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1999 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Feb 25, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0231
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A wireless keyboard or keypad (22) is powered remotely by a radio frequency exciter/receiver (20) and used in a radio frequency identification system (10). The wireless keyboard and the exciter/receiver communicate without wires via electrostatic or electromagnetic radiation. No power source is integrated with the wireless keypad. Thus, the wireless keypad is readily added to, or retrofit into, an existing radio frequency identification system. The keyboard has a plurality of keys (24) or control members that are manually actuated. Depression of a key or button, or other actuation of a control member, causes a predetermined response signal associated with that key to be generated. The response signal relates to an operation for a device or system associated with the exciter/receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.