Bsh Bosch Und Siemens Hausgeraete Gmbh

Bsh Bosch Und Siemens Hausgerate Gmbh

Bsh Hausgerate Gmbh

Wilfried Klopfer

Bernward Reinker

Hans-Jürgen Romanowski

Jörg Grosser

Bernward Maria Reinker

Ngoc Hung Pham

A capacitive proximity switch has an electrically conductive sensor surface, which is covered by an electrically non-conductive covering plate and which serves as a part of a capacitor having a capacitance that varies with proximity. The sensor surface is connected to a control input of a semiconductor switch that has a signal input with a clock signal and a signal output. A household appliance is equipped with the capacitive proximity switch. The signal output of the semiconductor switch has an output signal, which follows the clock signal and which has signal portions that are proportional to the capacitance of the capacitor formed with the sensor surface.

Capacitive proximity switch and domestic appliance equipped therewith

A capacitive proximity switch has an electrically conductive sensor surface, which is covered by an electrically non-conductive covering plate and which serves as a part of a capacitor with a capacitance that varies with proximity. The proximity switch includes a reference sensor surface for generating a reference signal for determining an actuation state of the proximity switch. Signal portions of the reference signal are proportional to the capacitance of a reference capacitor formed with the reference sensor surface, and the capacitance of the reference capacitor is determined by surrounding conditions of the sensor surface.

Capacitive proximity switch and household appliance equipped therewith

A capacitive proximity switch includes an electrically conductive sensor area, which is covered by an electrically-insulating cover plate, as part of a capacitor having a capacitance which varies as a result of proximity. An associated evaluation circuit is provided, and an electrically-conducting body, via which the sensor area is connected to the evaluation circuit and which is arranged between the electrically-insulating cover plate and a mount disposed at a distance therefrom. A domestic appliance includes such a proximity switch. At least one electronic component of the evaluation circuit is arranged on the mount such that it protrudes into a cavity, which is surrounded by the electrically conductive body.

Capacitive proximity switch, and domestic appliance comprising the same

A capacitive proximity switch has an electrically conductive sensor surface, which is covered by an electrically non-conductive covering plate and which serves as a part of a capacitor with a capacitance that varies with proximity. A household appliance is equipped with a proximity switch of this type. The sensor surface has an active shielding, which is formed by a shielding surface to which a clock signal is applied at the same time as it is applied to the sensor surface.

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Wuppertal, Germany

Wilfried Klopfer