Controller, input device, input system, display apparatus, and control method

An input system comprising:

• an operation surface;
• at least one vibration element of a plurality of vibration elements, which vibrates the operation surface or detects a vibration of the operation surface, each of the plurality of vibration elements having a piezoelectric element;
• and
• a processor programmed to:
• switch between vibration and detection modes in accordance with a temporal change along the operation surface of the detected contact position, the vibration mode being a mode in which the one or more first vibration elements of the vibration elements are caused to vibrate, the detection mode being a mode in which a vibration is detected by one or more second vibration elements of the vibration elements, the first vibration elements including the at least one vibration element, and the second vibration elements including the at least one vibration element;
• cause, in the vibration mode, the one or more first vibration elements to vibrate so as to vibrate the operation surface;
• and
• detect, in the detection mode, a vibration of the operation surface based on the vibration detected by the one or more second vibration elements.

A control method comprising:

• detecting a contact position with an operation surface;
• switching between vibration and detection modes of at least one vibration element of a plurality of vibration elements, each of the plurality of vibration elements having a piezoelectric element, in accordance with a temporal change along an operation surface of the detected contact position, the vibration mode being a mode in which the one or more vibration elements are caused to vibrate, and the detection mode being a mode in which a vibration is detected;
• causing, in the vibration mode, one or more first vibration elements of the vibration elements to vibrate so as to vibrate the operation surface, the one or more first vibration elements including the at least one vibration element;
• and
• detecting, in the detection mode, a vibration of the operation surface based on detection results of the vibration detected by one or more second vibration elements of the vibration elements, the one or more second vibration elements including the at least one vibration element.