Patent ID: 11988810

Abstract:
Implementations described herein generally relate to flexible display devices, and more specifically to flexible cover lens films. The flexible cover lens film has improved strength, elasticity, optical transmission, and anti-abrasion properties. The flexible cover lens film comprises a multi-layer hardcoat disposed on a substrate layer. The substrate layer has a thickness between 2 μm to 100 μm, and the multi-layer hardcoat has a thickness between 1 μm to 10 μm. The multi-layer hardcoat comprises a first layer deposited using a wet deposition process, a second layer deposited using a dry deposition process, and one or more adhesion promotion layers. In terms of optical properties, the multi-layer hardcoat has a total transmission greater than 88%, a haze of about 1% or less, and a yellowness index of b*<1. By combining wet and dry deposition processes to form the multi-layer hardcoat, the cover lens film is both flexible and strong with hardness between 4 H and 9 H.