Electrographic system and method
US4456787A · kind A · utility
32Cited by
16References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1982 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Jul 6, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/045
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electrographic system utilizing a singular resistive layer which may be transparent in conjunction with a supportive substrate. Through the use of an electromagnetic field generating sytlus in conjunction with coordinate alternating border switching, linear output performance is achieved. With the utilization of sum, difference and divider circuitry in conjuction with received output signals, the system remains immune from voltage variations occasioned in conjunction with the stylus and, thus, the stylus may be operated in varying spaced-relationship from the resistive surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.