Low-Voltage Stretchable Electroluminescent Loudspeakers with Synchronous Sound and Light Generation
발표자
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초록
내용
Recently, synesthetic electronic devices have attracted great attention for the precise and immediate perception of external stimuli. Previously, research about visualizing mechanical stimuli was actively reported, however, there were only a few studies about the visualization of sound waves. The alternating-current electroluminescent (ACEL) devices have been used as interactive displays emitting light with corresponding sound waves. While light emission is achieved by electroluminescence (EL), the sound wave is generated by the dielectric elastomer actuation under the AC voltage. Herein, we propose stretchable sound-in-displays with high-k dielectrics for performance enhancement. With the high-k dielectrics, the voltage focused on EL phosphor becomes higher, increasing light brightness. As a result, stretchable EL loudspeaker exhibits enhanced performances at a low working voltage (87.68 cd/m2, 79.70 dB at 120 V, 10 kHz) even under mechanical deformations.