| 摘要 |
PURPOSE:To extend a display area and improve the tone reporting characteristic by using a trasparent piezoelectric element as a sound producing body and providing it on a glass of a display part with adhesion. CONSTITUTION:A sound producing signal outputted from a sound producing signal synthesizing circuit 18 is sent to an amplifier 19 through an I/O switching circuit 14, and a transparent piezoelectric buzzer 20 is driven by the output of the amplifier 19. In this transparent piezoelectric buzzer 20, transparent electrodees 22a and 22b are formed on both sides of a transparent piezoelectric element 21 by vapor-deposition or the like. The transparent piezoelectric buzzer 20 is provided under a protective glass 23 of a display part 5. The glass 23 and the display part 5 are provided on the upper face of a case body 24, and the transparent piezoelectric buzzer 20 is provided on the whole area of the lower side of the glass 23 by adhesion. A module 25 is provided in the case body 24. A small-sized microphone 12 is arranged in the lower end part of the upper face of the case body 24. |
