Method for implementing a capacitive measurement in the presence of conductive decorative materials

摘要

A control panel (10, 50, 100) comprising: an electrically conductive substrate (12, 12 ') having a front surface (14, 14'), said substrate (12, 12 ') being electrically grounded; a first dielectric layer (18, 18 ') disposed on the front surface (14, 14') of the substrate (12, 12 '); and a first electrode layer (22, 22 ') disposed on a front surface (20, 20') of the first dielectric layer (18, 18 ') and electrically insulated from the substrate (12, 12'), the first one Electrode layer (22, 22 ') is in electrical connection with a switch circuit (30, 30') which is adapted to detect a change in the capacitance of the first electrode layer (22, 22 ') and wherein the front side surface (14, 14' ) of the substrate (12, 12 ') is a decorative surface that is substantially visible through the first dielectric layer (18, 18') and the first electrode layer (22, 22 ').