| 摘要 |
PROBLEM TO BE SOLVED: To provide a touch detection circuit capable of connecting with the sensor capacitance of a self-capacitance method disposed on a touch panel, increasing the amount of an integration signal per unit time, and reducing the operation period of touch detection and improving touch detection accuracy.SOLUTION: A touch detection circuit is a capacitance detection circuit that has an integration capacitance and is connectable with a sensor capacitance, charges and discharges a connected sensor capacitance, and cumulatively adds input and output electrical charges for charging and discharging the sensor capacitance to an integration capacitance. According to the direction of movement of electrical charges accompanying charging and discharging, the polarity of electrical charges added to the integration capacitance is reversed. Since the absolute value of the moving electrical charges is integrated when the sensor capacitance is not only charged but also discharged, the amount of a signal is doubled. |
