Patent ID: 9001080
Filing Date: 2015-04-07
Classification: G06F

Abstract:
1. A touch panel device comprising: a touch panel including: an alternating-current (AC) signal source configured to input an AC signal into the plurality of first electrodes; an inductive element electrically connected in series between the AC signal source and each of the plurality of first electrodes; a detection circuit configured to detect a change of a capacitance at each of the plurality of crossing points between respective one of the plurality of first electrodes and respective one of the plurality of second electrodes upon a touch of an object on the touch panel, based on a change of signals output from the plurality of second electrodes; a first electrode switch configured to change a connection status of connecting and disconnecting between the inductive element and each of the plurality of first electrodes; a second electrode switch configured to change a connection status of connecting and disconnecting between the detection circuit and each of the plurality of second electrodes; a control circuit configured to control the first electrode switch and the second electrode switch; and an image display element facing the touch panel, wherein the image display element is configured to generate a larger noise during a noise period larger than during a further period other than the noise period, and wherein the control circuit is configured to control the first electrode switch to: