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Paper by Professor Shin-Tson Wu in Optica generates news releases by OSA, AIP, NPR and others

A paper titled "Broadband antireflection film with moth-eye-like structure for flexible display applications" by Professor Shin-Tson Wu in Optica generates news releases by the Optical Society (OSA), American Institute of Physics (AIP), National Public Radio (NPR) and others.

Sunlight readability is a critical requirement for display devices, especially for mobile displays. Anti-reflection (AR) films can greatly improve sunlight readability by reducing the surface reflection. In this work, we demonstrate a broadband moth-eye-like AR surface on a flexible substrate, intended for flexible display applications. The moth-eye-like nanostructure was fabricated by an imprinting process onto a flexible substrate with a thin hard-coating film. The proposed nanostructure exhibits excellent AR with luminous reflectance <0.23% and haze below 1% with indistinguishable image quality deterioration. A rigorous numerical model is developed to simulate and optimize the optical behaviors. Excellent agreement between the experiment and simulation is obtained. Meanwhile, the nanostructure shows robust mechanical characteristics (pencil hardness >3??H>3??H), which is favorable for touch panels. A small bending radius (8 mm) was also demonstrated, which makes the proposed nanostructure applicable for flexible displays. Additionally, a fluoroalkyl coating was applied onto the moth-eye-like surface to improve the hydrophobicity (with a water contact angle >100°). Such a self-cleaning feature helps protect touch panels from dust and fingerprints. The proposed moth-eye-like AR film is expected to find widespread applications for sunlight readable flexible and curved displays.

OSA: New Screen Coating Makes Reading in Sunlight a Lot Easier. The Secret? Moth Eyes

Inside Science: Moths’ Eyes Inspire New Tech: Nanostructure similar to moth eyes could help cut reflections on smartphone screens

NPR: Moth Eyes Inspire Glare-Resistant Coating For Cellphone Screens

Discover Magazine: A Better Touch Screen, Inspired by Moth Eyes

The Wall Street Journal: Moths Help Scientists Attack Glare

Posted Friday, June 23, 2017

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