Location sensing system and method employing adaptive drive signal adjustment
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United States of America Patent
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Jan 3, 2012
Grant Date -
Jul 3, 2008
app pub date -
Dec 28, 2006
filing date -
Dec 28, 2006
priority date (Note) -
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Abstract
Systems and methods provide for adaptive drive signal adjustment to improve reception of a stylus signal at a location sensor. A location sensing system includes an untethered stylus comprising circuitry configured to receive a drive signal and transmit a stylus signal. The circuitry is configured to be energized by the received drive signal and includes frequency-sensitive circuitry. A location sensor includes a controller and a sensing array. The location sensor is configured to generate the drive signal and receive the stylus signal. The controller is configured to adjust a parameter of the drive signal that improves receptivity of the stylus signal by the location sensor.
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