Electronic notepad

Card – picture – or sign exhibiting – Changing exhibitor – Alphanumeric device

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Details

340707, 340765, 340784, G09F 900

Patent

active

047855649

ABSTRACT:
An electronic notepad comprises a wire/display area for receiving and displaying graphic information, a control for the device and a keyboard for entering information and/or instructions. Two types of liquid crystal display arrays, both fabricated on a semiconductor substrate with logic cells and reflector/field electrodes thereon are described. Further, two methods of sensing the position of a stylus are described whereby a user may enter graphic information directly into the notepad.

REFERENCES:
patent: 3944988 (1976-03-01), Mayer
patent: 4224615 (1980-09-01), Penz
patent: 4266164 (1981-05-01), Schizoeder
patent: 4318096 (1982-03-01), Thornburg et al.
patent: 4345248 (1982-08-01), Togashi et al.
patent: 4405921 (1983-09-01), Mukaiyama
patent: 4423929 (1984-01-01), Gomi

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