TOUCH SCREEN DEVICE, CAPACITANCE MEASURING CIRCUIT THEREOF, AND METHOD OF MEASURING CAPACITANCE
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United States of America Patent
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Issued Date -
Jul 7, 2011
app pub date -
Oct 5, 2010
filing date -
Jan 5, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
According to the present invention, a charging and discharging circuit is electrically connected to an operation signal line and a detection signal line, and repeats a charging and discharging operation of a node capacitor. The present invention also includes an integration capacitor electrically connected to the detection signal line and an integration circuit charging the integration capacitor to a unit charging voltage every charging and discharging operation of the node capacitor such that the integration capacitor is charged to a first voltage that is integrated according to a charging and discharging number. The integration circuit may include a reset switch electrically connected to the integration capacitor and discharging the first voltage integrated and charged to the integration capacitor for initializing.
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