| 摘要 |
PURPOSE: A capacitance touch sensing device is provided to minimize the generation of touch sensing errors caused by an external noise or parasitic capacitance by sensing touch input in a resonance method. CONSTITUTION: Touch sensing electrodes(41) are formed on a touch pad substrate to sense a capacitance touch. A frequency generation source(10) generates a scanning signal for sensing the capacitance touch and a scan switching circuit(30) selectively outputs the scanning signal to the touch sensing electrode. A resonant operation circuit(20) includes an inductor providing inductance elements to capacitance elements to output the scanning signal. A receiving unit(50) receives a resonant or non-resonant scanning signal through the resonant operation circuit. [Reference numerals] (60) Control unit |
