Color information input system for electronic blackboard

Details Color information input system for electronic blackboard Color information input system for electronic blackboard

1983-06-24

1985-02-26

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

340701, G08C 2100

Patent

active

045019312

ABSTRACT:
A color information input system in which handwritten information, such as letters or figures, etc., is input on an entry area by being converted into electrical signals. In order to display the handwritten information in color, different colored pens are stocked in pen stockers, each pen stocker having a detector which outputs a detection signal when the pen is removed from the corresponding pen stocker. The pen being used on the entry area is detected when it is removed from its pen stocker and color information is generated from the detection signal and passed on to a display unit.

REFERENCES:
patent: 4135245 (1979-01-01), Kemplin et al.
patent: 4318096 (1982-03-01), Thornburg et al.
patent: 4424572 (1984-01-01), Lorig et al.
European Search Report, Berlin, 2/13/1984.

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