Information input/output display device

Details Information input/output display device Information input/output display device

1985-02-15

1988-01-12

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340713, 350331T, 350351, G09G 336

Patent

active

047194570

ABSTRACT:
An information input/output display device comprising a dielectric which is held in a portion between one electrode and the other electrode opposite to each other and which has at least a first state and a second state of unequal capacitances, means to change the capacitance of the dielectric, capacitance holding means to hold at least temporarily a value of the capacitance of the dielectric in the first state, and means to compare the value of the capacitance of the dielectric with the value of the capacitance held by the capacitance holding means, whereby information can be read out without being affected by fluctuations in a distance d between the electrodes or/and in an ambient temperature T.

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IBM Technical Disc. Bul., vol. 12, No. 8, Jan. 1970, "Capacitive Touch Key Circuit", D. M. Taub.
IBM Tech. Disc. Bul., vol. 25, No. 8, Jan. 1983, "Dynamically Adjustable Capacitive Key Sensing Method", J. G. Irwin, Jr.
IBM Tech. Disc. Bul., vol. 27, No. 4A, Sep. 1984, "Dynamic Updating of Key-Sensing Thresholds", J. T. Rowe, Jr.

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