Data processing information input using optically sensed stylus

Details Data processing information input using optically sensed stylus Data processing information input using optically sensed stylus

1987-08-25

1988-09-20

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

340706, G08C 2100

Patent

active

047727632

ABSTRACT:
User-machine interaction through a touch input display screen is enhanced through the use of surface coding in the form of stylus diameter or reflectivity peripheral surface features that are sensed in optical sensing apparatus.

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N. S. Caswell, et al.,-Data Processing Input Interface (YO985-019).
L. K. Stephens-Moving Eraser for Graphics Screen (AT983-026).
G. A. Flurry-Real-Time Rub-Out Erase for an Electronic Handwriting Facility (YO983-054).

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