TOUCH SCREEN CONTROLLER
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United States of America Patent
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app pub date -
Jun 16, 2016
filing date -
Jan 8, 2016
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Abstract
A touch screen controller includes a driving circuit adapted for transmitting a high working voltage signal to the touch screen for enabling the touch screen to couple the high working voltage signal and to further generate a low working voltage signal, and a sensing circuit adapted for receiving the low working voltage signal from the touch screen for matching with the high working voltage signal to determine the variation in signal voltage between the high working voltage signal and the low working voltage signal and to further recognize a touch on the touch screen. The voltage level of the high working voltage signal provided by the driving circuit is five times over the voltage level of the low working voltage signal so that the sensing circuit can get the best signal-to-noise ratio, achieving optimal performance in touch control recognition.
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