Touch device
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United States of America Patent
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Nov 20, 2012
Grant Date -
May 26, 2011
app pub date -
Dec 22, 2009
filing date -
Nov 26, 2009
priority date (Note) -
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Abstract
A touch device includes a touch pad and a base having an accommodating region and at least one first conductor. The touch pad is received in the accommodating region and subjected to a force to generate a changeable position relative to the base. The touch pad has a touch surface consisting of a plurality of capacitive sensors and at least one second conductor connected with at least one of the capacitive sensors. The second conductor is electrically connected with the first conductor. Capacitances measured from the capacitive sensors are substantially different between the touch surface touched with a conductive object and the second conductor connected with the first conductor, which is connected to a fixed voltage, current or a ground. Therefore, a control unit connected to the capacitive sensors can generate different control signals from the connecting state between the first conductor and the second conductor.
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