Telegraphy – Systems – Position coordinate determination for writing
Patent
1986-02-12
1987-11-17
Schreyer, Stafford D.
Telegraphy
Systems
Position coordinate determination for writing
G08C 2100
Patent
active
047075708
ABSTRACT:
A manual information input device allows the user to manually enter desired information using a readily available writing instrument such as a pencil rather than a specially designated input stylus such as a light pen or an electromagnetic pen. The manual information input device comprises a substrate supporting electrodes on one surface thereof, an input panel disposed in facing relation to the substrate and supporting electrodes in confronting relation to the electrodes on the substrate, a spacer disposed between the substrate and the flexible input panel and defining a closed space therebetween, and an electrically insulating material sealed in the space. The input panel is resilient. The electrodes on the substrate and the input panel jointly constitute a pixel matrix. The electrically insulating material comprises a liquid and/or a group of particles.
REFERENCES:
patent: 3911215 (1975-10-01), Hurst et al.
patent: 4149029 (1979-04-01), Pobgee
Ide Yukio
Kageyama Yoshiyuki
Ohnuma Teruyuki
Ricoh & Company, Ltd.
Schreyer Stafford D.
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