Abstract: An improved scheme for selectively addressing a matrix arrangement comprised of ferroelectrics having x and y orthogonally disposed intersecting lines. A one-third selection scheme is utilized that includes normalized selection signals having amplitudes: V.sub.x =0; V.sub.x =2/3; V.sub.y =1/3; and V.sub.y =1, which signals can be applied to the intersection of an x and y-line. The instant selection scheme minimizes both hysteresis creep and the cross-coupling voltage between x and y-lines to prevent undesirable hysteresis switching of the ferroelectric matrix arrangement.

Abstract: A transparent keyboard switch which is suitable for use in switch arrays is disclosed. Switch nomenclature may be positioned behind the switch and viewed from in front of the switch. The transparent switch comprises a relatively rigid electrically insulating transparent substrate having a "lower" electrode disposed on the upper surface thereof and a relatively flexible transparent film having an "upper" electrode disposed on the underside thereof and a layer of electrically insulating fluid spacing the upper electrode from the lower electrode. The switch is rendered conductive by pressing on the flexible film to locally displace the electrically insulating fluid from between upper and lower switch electrodes and bring them into contact, thereby making the switch a closed circuit.