Transparent and flexible led-embedded display film using micro metal mesh

Abstract

Transparent and flexible displays have garnered attention in relation to digital signage, smart windows, AR devices, and healthcare applications. In this paper, a simple, cost-effective and highly conductive form factor of a transparent and flexible LED-embedded display film is proposed. Via UV imprinting, a micro metal mesh structurally having a high aspect ratio and that features a line width of 12 mu m and a thickness of 29 mu m was fabricated. It exhibits transmittance of 84.6 % at 550 nm and sheet resistance of 0.124 omega/sq. A bending test was conducted to demonstrate the flexibility resulting from the mesh structure. The fabrication of a LED-embedded display was achieved through pinnacle die punching to create a perforated region in the film. The display, which measures 10x12 cm with an integrated 8x8 LED array, was demonstrated under bending conditions within a bending radius of 30 mm. Anticipated applications encompass head-mounted displays and head-up displays.