Detection of defects in touch sensors
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United States of America Patent
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Mar 20, 2018
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app pub date -
May 30, 2012
filing date -
May 30, 2012
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Abstract
Defects in a touch sensor are detected by coupling the sensor lines to a common signal line. Each of the sensor lines is tested by disconnecting the sensor line from the common signal line, connecting it to a voltage (e.g., ground) and comparing the voltage on the common signal line to a reference voltage. Detected defects include a short circuit between any two transmit and/or receive lines and a short between any transmit or receive line to ground.
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