Cho Seungse, Kang Dong-Hee, Lee Hyejin, Kim Minsoo P, Kang Saewon, Shanker Ravi, Ko Hyunhyub
School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan Metropolitan City 689-798 Republic of Korea.
Adv Sci (Weinh). 2020 Nov 23;8(1):2001647. doi: 10.1002/advs.202001647. eCollection 2020 Jan.
The growing importance of human-machine interfaces and the rapid expansion of the internet of things (IoT) have inspired the integration of displays with sound generation systems to afford stretchable sound-in-display devices and thus establish human-to-machine connections via auditory system visualization. Herein, the synchronized generation of sound and color is demonstrated for a stretchable sound-in-display device with electrodes of strain-insensitive silver nanowires (AgNWs) and emissive layers of field-induced inorganic electroluminescent (EL) phosphors. In this device, EL phosphors embedded in a dielectric elastomer actuator (DEA) emit light under alternating-current bias, while audible sound waves are simultaneously generated via DEA actuation along with input sound signals. The electroluminescence and sound-generation performances of the fabricated device are highly robust and reliable, being insensitive to stretch-release cycling because of the presence of the AgNW stretchable electrodes. The presented principle of integrating light emission and acoustic systems in a single stretchable device can be further expanded to realize sound-in-display electronics for IoT and human-machine interface applications.
人机界面日益增长的重要性以及物联网（IoT）的迅速扩展，激发了将显示器与声音生成系统集成的想法，以实现可拉伸的显示中发声设备，并通过听觉系统可视化建立人机连接。在此，展示了一种可拉伸的显示中发声设备的声音与颜色的同步生成，该设备具有应变不敏感的银纳米线（AgNWs）电极和场致无机电致发光（EL）磷光体的发光层。在该设备中，嵌入介电弹性体致动器（DEA）中的EL磷光体在交流偏压下发光，而可听声波则通过DEA与输入声音信号一起驱动同时产生。由于存在AgNW可拉伸电极，所制造设备的电致发光和发声性能高度稳健且可靠，对拉伸-释放循环不敏感。在单个可拉伸设备中集成发光和声学系统的所提出原理可进一步扩展，以实现用于物联网和人机界面应用的显示中发声电子设备。
