PURPOSE: To make display easy to see, and downsize a circuit in an illuminated electronic equipment having an electroluminescent element.

CONSTITUTION: A buzzer driving means 107 charges/discharges pressure increasing voltage obtained from a pressure increasing element 102 to/from a piezoelectric element 106 by a control signal outputted from a buzzer signal generating means 111. A control signal prohibiting means 105 recognizes the signal outputted from the buzzer signal generating means 111, and outputs a control signal to prohibit signal output to a pressure increasing signal generating means 104 and a discharge signal generating means 110. When the control signal prohibiting means 105 recognizes a driving pulse to drive an electroluminescent element for display illumination and the piezoelectric element for a buzzer, light emission and sounding are performed by a single pressure increasing element.