Electrographic system and method

Telegraphy – Systems – Position coordinate determination for writing

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G08C 2100

Patent

active

044567871

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.

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Spec. Sheet-Trazor Touch Panel Model 506, Spinal System Instruments Inc.
Spec. Sheet-Touch Screen Digitizer, TSD Display Products Inc.
Spec. Sheet-E270 Transparent Position Sensor, Elographics, Inc.

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