Proximity control switching panels

Details Proximity control switching panels Proximity control switching panels

G - Physics

06

F

340/178

G06F 3/023 (2006.01) H03K 17/96 (2006.01)

Patent

CA 1187153

ABSTRACT In the manufacture of proximity control switching panels including a plurality of capacitors each comprising a command electrode plate and at least one slave electrode plate arranged in capacitive relation, there is a problem of achiev- ing a high degree of standardisation while allowing for different user requirements. In some embodiments of the pre- sent invention the panel comprises a plurality of capacitors of which the command and slave electrode plates are respectively deposited on front and rear dielectric sheets. At least the front sheet and the command electrodes are light-transmitting, and a dielectric indexing sheet which carries a plurality of switch-identifying indicia, each located in register with a capacitor, is sandwiched between the front and rear sheets. The indicia may be formed by printing. In other embodiments, all the electrode plates are light-transmitting and they are deposited on a single transparent sheet behind which is located a dielectric indexing sheet printed to exhibit the switch- identifying indicia. In either case, the whole panel, apart from printed portions of the indexing sheet, may be trans- parent. A screening electrode may be provided and the panel may be bonded together using an adhesive bead and/or adhesive laminating film.

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