Patent ID: 8654097
Filing Date: 2014-02-18
Classification: H03K

Abstract:
1. An electrostatic capacitive touch sensor device, comprising: a first sensing electrode having a first electrostatic capacitance value that changes depending on a touch operation by an operator; a second sensing electrode having a second electrostatic capacitance value that changes depending on a touch operation by the operator; a wave signal source that outputs a wave signal; a wiring that connects the wave signal source to the first and second sensing electrodes to provide the wave signal to the first and second sensing electrodes; a first impedance element provided in the wiring at a position between the first sensing electrode and the wave signal source; a second impedance element provided in the wiring at a position between the second sensing electrode and the wave signal source; a first shield element that shields the wiring between the first sensing electrode and the first impedance element; a second shield element that shields the wiring between the second sensing electrode and the second impedance element; a first detector circuit connected to the first sensing electrode and the wave source signal, and outputting a first output signal that changes in accordance with changes in the electrostatic capacitance value of the first sensing electrode; a second detector circuit connected to the second sensing electrode and the wave source signal, and outputting a second output signal that changes in accordance with changes in the electrostatic capacitance value of the second sensing electrode; and a shield signal source connected to the wave signal source and to the first and second shield elements, and applying a shield signal to the first and second shield elements, the shield signal having a same phase and an amplitude as the wave signal, the shield signal source being directly connected to the wire at a position between the wave signal source and the first and second detector circuits.