CONTROL SYSTEM OF A TOUCH PANEL AND A CONTROL METHOD THEREOF
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United States of America Patent
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Issued Date -
Feb 21, 2013
app pub date -
Jun 19, 2012
filing date -
Aug 18, 2011
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Abstract
A control system of a touch panel comprises a voltage controlled oscillator and a signal processing module. The voltage controlled oscillator is used for converting a direct current voltage signal that corresponds to a sensing signal of said touch panel into a sinusoidal signal. The signal processing module counts the frequency of the sinusoidal signal. The voltage controlled oscillator of the control system of touch panel converts direct current voltage signal into sinusoidal signal. Due to a wide change in the range of frequency of the sinusoidal signal that is outputted from the voltage controlled oscillator, the signal is not easily affected by noise, and thus, the signal-to-noise ratio of control system is comparatively higher. The present disclosure also provides a control method of touch panel.
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