Kirigami-Liquid Structure for Electroluminescent Array Attachable onto Three-Dimensional Surfaces

This paper presents a new method for making electronic devices attachable onto three-dimensional surfaces. Sheets with cut patterns, kirigami structure, exhibit stretchability by deforming out-of-plane and expanding the cut patterns. Because of the stretchability, kirigami structures can be attached onto three-dimensional surfaces. However, due to openings resulting from cut patterns, kirigami cannot cover entire surfaces of three-dimensional structures. This drawback is critical especially for display devices. We fulfill openings of a kirigami structure with liquid electroluminescent (EL) elastomer, and achieve EL array attachable onto three-dimensional surfaces. The openings are fulfilled, and the resulting structure has a large device area in comparison to other kirigami devices. In this paper, we present the fabrication process and the experimental results of the EL array made with the proposed kirigami-liquid method.