Positional information inputting device using sheet-like photo-c

Details Positional information inputting device using sheet-like photo-c Positional information inputting device using sheet-like photo-c

1990-06-19

1991-09-03

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

178 20, G08C 2100

Patent

active

050456431

ABSTRACT:
A positional information inputting device uses selective ones of a sheet-like photo-conductive switch, a pressure-sensitive switch and a photo-electric converting device. A sheet-like storage battery is provided which includes a plurality of battery cells arranged in matrix form. The sheet-like photo-conductive switch, for example, has an equal plurality of photo-conductive switching elements provided on one selected side of an anode or a cathode of the storage battery in one-to-one correspondence to the battery cells, and the storage battery and the switch constitute an optical memory having an equal plurality of optical memory cells. The battery cells are uniformly charged to a predetermined voltage, and an optical beam is irradiated onto the switching elements so that the latter are selectively rendered conductive corresponding to the irradiation of the optical beam. The charges in the battery cells are discahrged through the associated switching elements in accordance with the irradiation of the optical beam. Residual amounts of charges in the battery cells after the battery cells have been discharged are measured to indicate positional information inputted by the optical beam.

REFERENCES:
patent: 3746867 (1973-07-01), Phela et al.

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