TOUCH INPUT DEVICE

摘要

A touch input device may be provided that includes: a touch sensor panel including a plurality of drive electrodes, a plurality of receiving electrodes and a plurality of node capacitors formed by the drive electrode and the receiving electrode; a driving part applying a driving signal to the drive electrode; a detector including a receiver which receives a signal including information on a capacitance of the node capacitor through the receiving electrode and integrates the signal; and an input capacitor connected between the receiver and the receiving electrode.

主权项

1. A touch detection circuit for a capacitive touch sensor panel comprising a plurality of drive electrodes and a plurality of receiving electrodes, the touch detection circuit comprising:
a driving part which applies a driving signal of an alternating current (AC) waveform to the drive electrode; an amplifier to which a signal received from the receiving electrode is inputted; a feedback capacitor coupled between an output terminal of the amplifier and a negative input terminal of the amplifier to which the received signal is inputted; a resistor connected in series to the feedback capacitor between the negative input terminal and the output terminal; a switch connected in parallel to both the feedback capacitor and the resistor between the negative input terminal and the output terminal; and a configuration converting an output signal of the amplifier into a digital signal, wherein the feedback capacitor is configured such that a value of the feedback capacitor is controllable.