US Patent 10120484 Drive control apparatus, electronic device and drive controlling method

A drive control apparatus that drives a vibrating element of an electronic device including a touch panel and the vibrating element generating a vibration in a manipulation input surface of the touch panel, including, a drive controller being configured to drive the vibrating element by using a drive signal causing the vibrating element to generate a natural vibration in an ultrasound-frequency-band in the manipulation input surface, the drive controller being configured to drive the vibrating element so as to switch the natural vibration between a strong level and a weak level in accordance with a travel distance of a position of a manipulation input performed onto the manipulation input surface.