Patent ID: 11941205
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 5:
6. 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:
acquiring a designated frequency;
generating a touch drive signal by synthesizing a rectangular wave with a sinusoidal wave, the sinusoidal wave having the designated frequency, and the sinusoidal wave having an opposite phase with respect to a waveform of a frequency component having the designated frequency in the rectangular wave when the designated frequency is acquired;
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.