Intrinsically Synchronized Flexible Visuo‐Haptic Device Operated by Single External Electric Field

Providing multisensory expression in a synchronized form helps human perception in human-machine interfaces. Synchronized visuo-haptic integration has been relatively less explored because the two expressions operate by different principles. This study demonstrates a flexible visuo-haptic device that generates haptic sensation by electrovibration (EV) in conjunction with the synchronized optical expression by alternating-current electroluminescence (ACEL). This study suggests material design and electric field modulation that are effective for both EV and electroluminescence (EL). Owing to the structural simplicity of the opto-electrovibration (O-EV) device, the EV and EL are intrinsically coupled under single electric field input. A curved O-EV device simultaneously provides localized frictional tactile expression and localized luminescence on the touch screen. This study opens a simple material approach for multisensory expression that can be useful in soft haptic devices.