Input device

Details Input device Input device

1986-09-29

1987-09-22

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

178 18, G06K 900

Patent

active

046960481

ABSTRACT:
An input device has a matrix input unit having a plurality of switches for inputting a pattern, a signal generator for generating signals identifying the actuation of the switches, and a discriminator responsive to the signals from the signal generator to discriminate the actuated one of the switches. The discriminator discriminates the actuated switch by checking an interval of the signals from the sequentially actuated switches.

REFERENCES:
patent: 3290651 (1966-12-01), Paufve et al.
patent: 3652990 (1972-03-01), Darwin
patent: 3781855 (1973-12-01), Killen

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