Display input device and information processing apparatus

A display input device comprising:

• a display portion;
• a touch panel provided on an upper surface of the display portion and configured to detect a touch operation;
• a plurality of piezoelectric elements provided in a divided manner on both of a front surface and a back surface of the touch panel;
• circuitry of a display control portion configured to control display of the display portion;
• circuitry of a press detection portion configured to detect, separately from the touch operation, a press operation performed with a greater press force than in the touch operation detected by the touch panel, in accordance with output voltage from the piezoelectric elements;
• and
• circuitry of a vibration control portion that stands by waiting for a press operation at a point when the touch operation is detected, and is configured to, when a press operation of the piezoelectric elements is detected by the press detection portion, input a press detection signal to the display control portion and apply a voltage having a polarity opposite to the output voltage, as a repelling voltage for exerting a force in a direction of repelling the press operation, to the piezoelectric element, wherein
• the plurality of piezoelectric elements include three piezoelectric elements arranged at an upper end portion of the touch panel and three piezoelectric elements arranged at a lower end portion of the touch panel, and among each of the three piezoelectric elements arranged at the upper end portion of the touch panel and the three piezoelectric elements arranged at the lower end portion of the touch panel, a piezoelectric element positioned at a center is provided on a front surface of the touch panel and the other two piezoelectric elements are provided on a back surface of the touch panel,
• when the press detection signal is inputted, the display control portion causes the display portion to display, as a vibration image, a moving image showing vibration of an entire screen of the display portion, and
• after the vibration control portion has inputted the press detection signal to the display control portion, when a delay time has elapsed which is set in advance as a required time until the signal display is executed by the display control portion, the vibration control portion applies the repelling voltage to the piezoelectric elements.