초록 ▼

A capacitive keyboard structure, the keyboard comprising on one face of a substrate a series of static sensitive keys each associated with a pair of electrodes: an emitting electrode excited sequentially by an alternating signal supplied by an emitting line and a receiving electrode which is coupled

A capacitive keyboard structure, the keyboard comprising on one face of a substrate a series of static sensitive keys each associated with a pair of electrodes: an emitting electrode excited sequentially by an alternating signal supplied by an emitting line and a receiving electrode which is coupled capacitively to the emitting electrode by the corresponding key and on which a receiving line collects the variations of the signal as an effect of possible presence of a user\s finger in the neighborhood of the key, wherein the electrodes of one same type are disposed on such face, the electrodes of the other type being disposed on the other face of the substrate, thus avoiding the crossing of the emitting and receiving lines. Application to the control of an industrial or publicly available apparatus.

대표청구항 ▼

A capacitive keyboard structure comprising a substrate having an upper face which is positioned for access by a user and having a lower face, a series of static sensitive keys disposed on the upper face, each key being associated with a first and a second electrode, one of said electrodes being an e

A capacitive keyboard structure comprising a substrate having an upper face which is positioned for access by a user and having a lower face, a series of static sensitive keys disposed on the upper face, each key being associated with a first and a second electrode, one of said electrodes being an emitting electrode which is excited sequentially by an alternating signal delivered by an emitting line connected to said emitting electrode, and the other of said electrodes being a receiving electrode which is coupled capacitively to the emitting electrode by the associated static sensitive key and which impresses on a receiving line connected to the receiving electrode variations of the alternating signal as an effect of the presence of a user\s finger in the vicinity of such static sensitive key, the first electrode being formed to enclose on the upper face its associated key, and the second electrode being disposed on the lower face below the associated key.