Patent ID: 8547117
Filing Date: 2013-10-01
Classification: G06F,H03K

Abstract:
1. A capacitive touch panel, comprising: a plurality of sensing electrodes arranged on an insulating panel while being insulated from each other; a plurality of capacitance-time conversion means having the same structure connected to the respective sensing electrodes, the capacitance-time conversion means each outputting a binary signal, the binary signal having binary data that is inverted in varying time with respect to a predetermined base point in time depending on a magnitude of a stray capacitance of a corresponding sensing electrode; and input operation detecting means for detecting a sensing electrode an input unit is approaching by comparing the magnitudes of the stray capacitances of the sensing electrodes based on times for the binary data to be inverted with respect to the base point in time of the binary signals, wherein the capacitance-time conversion means includes: wherein the charge and discharge circuits of the specific capacitance-time conversion means connected to respective ones of at least two or more specific sensing electrodes raise or reduce the electric potentials of the specific sensing electrodes with respect to the base point in time under the same charge control or the same discharge control, and wherein the input operation detecting means detects any of the specific sensing electrodes the input unit is approaching based on times for the binary data of the binary signals output from the comparison circuits of the specific capacitance-time conversion means to be inverted with respect to the base point in time.