CPC G06F 3/041662 (2019.05) [G06F 3/0412 (2013.01); G06F 3/04164 (2019.05); G06F 3/0446 (2019.05)] | 6 Claims |
1. A control method adapted to control a display device, the display device comprising a plurality of common electrodes, the plurality of common electrodes being commonly used for image display and touch detection, the control method comprising:
generating a touch drive signal by superimposing a fundamental wave and one or more odd-order harmonics having frequencies lower than a predetermined frequency range that includes a designated frequency on one another;
supplying the touch drive signal to each of the plurality of common electrodes; and
detecting a touch by an object on the display device based on a detection signal received from each of the plurality of common electrodes, wherein
the touch drive signal includes a harmonic having a frequency different from the designated frequency and does not include a harmonic having the designated frequency.
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