On an improvement of low bass characteristics on the OLED flat panel speaker

Abstract

Recently, researches using OLED flat panel displays as speakers have attracted attention. However, due to the local characteristics of the flat panel speaker, the bass characteristic below 500 Hz is insufficient. The flat panel loudspeaker drives several watts of power into the exciter attached to the back of the flat panel. The exciter of the flat plate has a characteristic that the sound is driven forward from the local region, so the characteristics of the bass region are deteriorated. Therefore, in this paper, the research was conducted to widen the sound by attaching the exciter to the rigid bar. It is a principle to compensate the bass region of the flat panel speaker using an array type exciter. In order to improve the bass sound, the rigidity bar is used instead of the array exciters to improve the manufacturing process and cost. Compared to the conventional flat panel speaker, when the rigid bar is attached, the bass bandwidth is improved to 200 Hz. In the future, it is necessary to minimize the effect of the rigid bar on the high-pitched area compared to using exciter array.