| 摘要 |
<p>PURPOSE: A capacitive touch detecting system capable of adjusting capacitance is provided to detect an object which enters into a sensing area without a direction contact with a sensing device and prevent a problem that a voltage of a response terminal is too high. CONSTITUTION: A sensing electrode(EDT) is capacitively coupled with a driving electrode. The sensing electrode generates an induction charge by a voltage change of the driving electrode. A charge collector(130) is formed between a charge storage terminal and a response terminal. The charge collector generates a voltage in the response terminal based on the amount of charges which enter into the charge storage terminal. A charge measuring device(140) measures a voltage of the response terminal. A switching device(150) couples the sensing electrode with the charge storage terminal during a first timing interval. A controller(190) provides charge capacitive selection information which depends on a voltage of the response terminal.</p> |
