APPARATUS AND METHOD FOR SENSING CAPACITANCE, AND TOUCHSCREEN APPARATUS

摘要

The present invention relates to a capacitance detection device, a capacitance detection method, and a touch screen device. A capacitance detection device given in the present invention includes a first integral circuit which includes a first capacitor chargeable by capacitance variation in a detection electrode; a comparison circuit which compares the level of the output signal of the first integral circuit and a certain reference level; and a noise removing unit which includes multiple switches operated by the output of the comparison circuit. The comparison circuit controls each of the multiple switches to discharge the charges accumulated in the first capacitor if the level of the output signal of the integral circuit is greater than the reference level. [Reference numerals] (210) First integrating circuit unit;(220) Comparison circuit unit;(230) Noise removal unit;(240) Second integrating circuit unit;(250) Driving circuit unit