Capacitive touch panel input device with improved signal-to-noise detection and input detection method thereof

摘要

A touch panel input device and an input detection method thereof are provided. A driving signal is controlled to include a plurality of time intervals in which the driving signal is applied to at least one of at least two driving signal electrodes simultaneously driven, and in which the driving signal is not applied to at least one of at least two driving signal electrodes simultaneously driven. A driving signal supplier causes that a combination of the driving signal electrode to which the driving signal is applied in one of the plurality of time intervals and the driving signal electrode to which the driving signal is not applied in the one of the plurality of time intervals is different from a combination of the driving signal electrode to which the driving signal is applied in the other of the plurality of time intervals and the driving signal electrode to which the driving signal is not applied in the other of the plurality of time intervals. At least one among the driving signals which are simultaneously applied to the driving signal electrode has a phase difference from the other driving signals.

主权项

1. A touch panel input device comprising:
a touch panel which comprises a plurality of node capacitors, each of which is formed by one of a plurality of driving signal electrodes and one of a plurality of sensing signal electrodes; a driving signal supplier which drives simultaneously at least two of the plurality of driving signal electrodes by applying driving signals; and a sensing signal part which receives a sensing signal comprising information on capacitances of the plurality of node capacitors through the plurality of sensing signal electrodes,
wherein the driving signal is controlled to comprise a plurality of time intervals in which the driving signal is applied to at least one of the at least two driving signal electrodes simultaneously driven, and in which the driving signal is not applied to at least one of the at least two driving signal electrodes simultaneously driven, wherein the driving signal supplier causes that a combination of the driving signal electrode to which the driving signal is applied in one of the plurality of time intervals and the driving signal electrode to which the driving signal is not applied in the one of the plurality of time intervals is different from a combination of the driving signal electrode to which the driving signal is applied in the other of the plurality of time intervals and the driving signal electrode to which the driving signal is not applied in the other of the plurality of time intervals, and wherein at least one among the driving signals which are simultaneously applied to the driving signal electrodes has a phase difference from the other driving signals, andwherein the combination of the driving signal electrode to which the driving signal is applied and the driving signal electrode to which the driving signal is not applied is formed through a Pseudo-Random Bit Stream (PRBS) code, and wherein the driving signals having the phase difference correspond to a code obtained by multiplying the PRBS code by −1.