| 摘要 |
<p>According to an embodiment of the present invention, a touch detecting apparatus includes: a plurality of sensor pads which form touch capacitance regarding a touch input means; a driving unit which applies a sinusoidal voltage to each sensor pad; an amplifying unit which has a first input terminal connected to output of the sensor pad, and a second input terminal connecting a preset reference voltage; a first switch which connects the output of the sensor pad with the first input terminal of the amplifying unit; a second switch which controls an electric potential between the first input terminal and an output terminal of the amplifying unit; and a touch detection unit which detects a touch based on variation of a voltage at the output terminal of the amplifying unit according to the touch capacitance. The first switch and the second switch are turned on or off alternately.</p> |
