Active matrix capacitive touch sensor
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United States of America Patent
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Sep 6, 2016
Grant Date -
Jun 23, 2016
app pub date -
Dec 22, 2014
filing date -
Dec 22, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
Examples of the disclosure provide an active matrix capacitive touch sensor. In some examples, a sensor includes a plurality of primary ring oscillators, a plurality of reference ring oscillators, wherein each reference ring oscillator is associated with a respective primary ring oscillator, at least one row trace, wherein each row trace is coupled to at least one primary ring oscillator and a reference ring oscillator for each primary ring oscillator, at least one sensor column trace coupled to one primary ring oscillator for each row trace, and at least one reference column trace coupled to one reference ring oscillator for each row trace. Examples of the disclosure enable touch-screen technology to provide increased pad sensitivity and multi-touch capability in a cost-effective and scalable manner.
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