Ferroelectric liquid crystal touch panel

Details Ferroelectric liquid crystal touch panel Ferroelectric liquid crystal touch panel

1990-01-16

1992-06-16

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

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

340706, 341 34, 310338, G09G 302

Patent

active

051227878

ABSTRACT:
A ferroelectric liquid crystal touch panel includes a ferroelectric liquid crystal panel including counterposed electrodes and a ferroelectric liquid crystal positioned between the electrodes; a position detector for detecting a pushed position on the ferroelectric liquid crystal through the electrodes by means of an electromotive force generated when the ferroelectric liquid crystal is pushed; a display control circuit for controlling a display state of the ferroelectric liquid crystal through the electrodes; a sound generation control circuit for supplying a sound generation signal to the electrodes so that the ferroelectric liquid crystal panel generates a sound in correspondence thereto; and a selection circuit for selectively connecting the position detector, the display control circuit and the sound generation control circuit to the electrodes.

REFERENCES:
patent: 4412210 (1983-10-01), Washizuka et al.
patent: 4869577 (1989-09-01), Masaki
patent: 4875378 (1989-10-01), Yamazaki et al.

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