Wireless Stand‐Alone Trimodal Interactive Display Enabled by Direct Capacitive Coupling
Jihye Jang, Seung Won Lee, Seokyeong Lee, Chang Eun Lee, Eui Hyuk Kim, Wookyeong Jin, Sejeong Lee, Youngkyung Kim, Jin Woo Oh, Youngdoo Jung, HoYeon Kim, Hyungseok Yong, Jeongok Park, Sangmin Lee, Cheolmin Park
Abstract
With recent advances in interactive displays, the development of a stand-alone interactive display with no electrical interconnection is of great interest. Here, a wireless stand-alone interactive display (WiSID), enabled by direct capacitive coupling, consisting of three layers: two in-plane metal electrodes separated by a gap, a composite layer for field-induced electroluminescence (EL) and inverse piezoelectric sound, and a stimuli-responsive layer, from bottom to top, is presented. Alternating current power necessary for field-induced EL and inverse piezoelectric sound is wirelessly transferred from a power unit, with two in-plane electrodes remotely separated from the WiSID. The unique in-plane power transfer through the stimuli-sensitive polar bridge allows stand-alone operation of the WiSID, making it suitable for the wireless dynamic monitoring of medical fluids. Moreover, a haptic wireless stand-alone trimodal interactive display mounted on a human finger is demonstrated, whereby touch is wirelessly displayed in various outputs of EL, inverse piezoelectric sound, and tactile vibration, making it suitable for a wireless three-mode smart braille display.