Capacitive touchpad and toy incorporating the same
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United States of America Patent
Stats
-
Jan 17, 2012
Grant Date -
Dec 24, 2009
app pub date -
May 12, 2009
filing date -
Jun 20, 2008
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Capacitive touchpad assemblies, toys including capacitive touchpad assemblies and integral card readers, and methods for detecting contact with a capacitive touch surface are provided. A capacitive touch surface may have a capacity that varies depending on whether it is being contacted by an object such as a human finger. A voltage of the capacitive touch surface may be altered during each of a predetermined number of recurring time intervals. The capacitance of the capacitive touch surface will determine the amount of time required to alter its voltage to a threshold voltage within each time interval. The sum amount of time required for the voltage of the capacitive touch surface to reach the threshold voltage in a predetermined number of time intervals may be used to determine whether the capacitive touch surface is being touched.
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