Capacitive touch sensor
First Claim
Patent Images
1. A fluid delivery apparatus comprising:
- a spout;
a fluid supply conduit supported by the spout;
a valve assembly to supply fluid through the fluid supply conduit;
a capacitive touch sensor including an electrode, a pulse generator, a DC filter coupled to an output of the pulse generator and the electrode and configured to filter a DC component of the combined signals from the electrode and the pulse generator to provide an AC output signal, a rectifier having an input coupled to an output of the DC filter to provide a DC output signal; and
a controller coupled to an output of the rectifier, the controller also being coupled to the valve assembly, the controller being configured to detect a user touching the electrode based on the DC output signal from the rectifier and configured to control flow of fluid through the fluid supply conduit.
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Abstract
A fluid delivery apparatus comprises a spout, a fluid supply conduit supported by the spout, a valve assembly to supply fluid through the fluid supply conduit, and a capacitive touch sensor. The capacitive touch sensor is coupled to a controller. The controller is also coupled to the valve assembly. The controller is configured to detect a user touching the sensor and to control flow of fluid through the fluid supply conduit.
500 Citations
39 Claims
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1. A fluid delivery apparatus comprising:
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a spout; a fluid supply conduit supported by the spout; a valve assembly to supply fluid through the fluid supply conduit; a capacitive touch sensor including an electrode, a pulse generator, a DC filter coupled to an output of the pulse generator and the electrode and configured to filter a DC component of the combined signals from the electrode and the pulse generator to provide an AC output signal, a rectifier having an input coupled to an output of the DC filter to provide a DC output signal; and a controller coupled to an output of the rectifier, the controller also being coupled to the valve assembly, the controller being configured to detect a user touching the electrode based on the DC output signal from the rectifier and configured to control flow of fluid through the fluid supply conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A capacitive touch sensor comprising:
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an electrode; a pulse generator; a DC filter coupled to an output of the pulse generator and to the electrode, the DC filter being configured to filter a DC component of a combined signal from the electrode and the pulse generator to provide an AC output signal; a rectifier having an input coupled to an output of the DC filter to rectify the AC output signal and provide a DC output signal; and a control circuit coupled to an output of the rectifier, the control circuit being configured to detect a user touching the electrode based on changes in the DC output signal. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification