Position-sensitive photodetector and light transmissive tablet a

Details Position-sensitive photodetector and light transmissive tablet a Position-sensitive photodetector and light transmissive tablet a

1986-08-13

1988-12-27

George, Keith E.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

340707, 178 18, H04M 1100, G06F 3033, G08C 2100

Patent

active

047946342

ABSTRACT:
The data input device comprises a tablet portion made of a two-dimensional position-sensitive photodetector and a planar display element laid one on the other, and a light emitting pen forming a light spot on a light-receiving surface of the position-sensitive photodetector. The locus of the movement of the light emitting pen is displayed on the surface of the planar display element at correspond positions in accordance with the output of the two-dimensional position-sensitive photodetector, and the contents of the display provided on the planar displaying element are allowed to be delivered for subsequent processings.

REFERENCES:
patent: 4177354 (1979-12-01), Matthews
patent: 4345248 (1982-08-01), Togashi et al.
patent: 4653086 (1987-03-01), Laube
patent: 4655552 (1987-04-01), Togashi et al.
patent: 4659876 (1987-04-01), Sullivan et al.
patent: 4679909 (1987-07-01), Hamada et al.
patent: 4723836 (1988-02-01), Kono et al.

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