Force invariant touch sensitive actuator

Details Force invariant touch sensitive actuator Force invariant touch sensitive actuator

2006-06-20

2010-12-21

Owens, Douglas W (Department: 2821)

Electricity: power supply or regulation systems

External or operator controlled

Phase controlled switching using electronic tube or a three...

C323S904000, C323S909000, C315S362000, C315SDIG002

Reexamination Certificate

active

07855543

ABSTRACT:
A load control device, such as a dimmer switch, has a touch sensitive actuator, such as a three-wire touch sensitive screen, that produces an output voltage representing the position of a manual pressure touch along a longitudinal axis of the actuator. A stabilizing circuit receives the output voltage of the actuator and comprises, for example, a capacitor. The stabilizing circuit operates to prevent the detection of transient touches and touches having less than a certain actuation force, such that the output voltage is responsive only to the position of the touch. In addition, a usage detection circuit may also be coupled to the output voltage of the actuator for determining whether the touch is presently occurring. Alternatively, the actuator may comprise a four-wire touch sensitive screen that produces a first output voltage received by the stabilizing circuit and a second output voltage received by the usage detection circuit.

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