Coordinate input device
US4752655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1985 |
| Grant date | Jun 21, 1988 |
| Priority date | — |
| Expiry date | Nov 14, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/045
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A transparent coordinate input device can be used integrally with a display unit or overlap it and has a coordinate input panel (i.e., a transparent drawing pad). The input panel has a transparent insulating substrate, a flat transparent resistor film of a rectangular shape which is formed on the substrate, and detection electrodes, electrically connected to four sides of the transparent resistor film, for causing a current to flow along one of current flow-in and flow-out directions with respect to the transparent resistor film. The transparent coordinate input device also has a coordinate correction table for storing correction data representing the relationship between the input coordinate signals representing an input position of the electrical pen and the output coordinate signals representing a position and detected by a detector, and an operation circuit for performing coordinate correction by accessing the coordinate correction table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.