Coordinates detector wherein X and Y emitting elements are enabl

Details Coordinates detector wherein X and Y emitting elements are enabl Coordinates detector wherein X and Y emitting elements are enabl

1985-03-25

1988-01-12

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340556, G01V 904, H01J 4014

Patent

active

047193395

ABSTRACT:
A coordinates detector comprises a plurality of pairs of light emitting and receiving elements arranged such that in an X direction pairs of light emitting and receiving elements are located in parallel and in a Y direction pairs of light emitting and receiving elements are located in parallel on an orthogonal coordinates plane. The pairs of light emitting and receiving elements are sequentially, simultaneously and separately enabled and a two-dimensional designation position is detected from the detection output of the light receiving element and a signal for selecting the pair of light emitting and receiving elements.

REFERENCES:
patent: 3746863 (1973-07-01), Pronovost
patent: 3764813 (1973-10-01), Clement et al.
patent: 4063085 (1977-12-01), Montanvert
patent: 4313109 (1982-01-01), Funk et al.
patent: 4413314 (1983-11-01), Slater
patent: 4517559 (1985-05-01), Dietch et al.

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