Coordinate input device
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United States of America Patent
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-
Jun 21, 1988
Grant Date -
N/A
app pub date -
Nov 14, 1985
filing date -
Nov 16, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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