Digitizer tablet using relative phase detection
US5416280A · kind A · utility
14Cited by
6References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1993 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Apr 8, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/046
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a digitizer and method for laying out and using the tablet of the digitizer, wherein the tablet provides unambiguous binary code outputs. The digitizer may employe a cordless transducer and signal processing circuitry providing relative phase detection for determining coarse location of the transducer. An unambiguous binary code output is obtained with a grid layout which generates a set of unique binary codes, none of which is the the same or the binary inverse of any other member of the set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.