Ultrasonic coordinates input device
US5750941A · kind A · utility
211Cited by
7References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1995 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Aug 29, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0433
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The ultrasonic coordinates input device includes receivers grouped into a plurality of groups, each receiver receiving the ultrasonic waves propagated through a propagator so as to calculate the coordinates of the ultrasonic wave inputted positions on the basis of signals received by each group, thereby ensuring that the coordinates are calculated with a simple mathematical formulae with a negligible error if any.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.