Apparatus and method for sensing capacitance, and touch screen apparatus

摘要

There are provided an apparatus for sensing capacitance, a method for sensing capacitance, and a touch screen apparatus. The apparatus for sensing capacitance includes; a first integration circuit unit including a first capacitor charged by a change in capacitance occurring in a sensing electrode; a comparison circuit unit comparing a level of an output signal of the first integration circuit unit with a predetermined reference level; and a noise removal unit including a plurality of switches operating according to an output of the comparison circuit unit, wherein the comparison circuit unit controls an operation of each of the plurality of switches to discharge charges charged in the first capacitor when the level of the output signal of the first integration circuit unit is higher than the reference level.

主权项

1. An apparatus for sensing capacitance, the apparatus comprising:
a first integration circuit unit, including a first capacitor configured to be charged by a change in capacitance occurring in a sensing electrode; a comparison circuit unit, configured to compare a level of an output signal of the first integration circuit unit with a predetermined reference level; and a noise removal unit, including a plurality of switches configured to operate according to an output of the comparison circuit unit, wherein the comparison circuit unit is configured to control an operation of each of the plurality of switches to discharge charges charged in the first capacitor, when the level of the output signal of the first integration circuit unit is higher than the reference level.