▎ 摘　　要

NOVELTY - The layer has a layer main body provided with a sapphire substrate. A graphene film is coated on the sapphire substrate. USE - Protective layer for use in a display screen (claimed). ADVANTAGE - The layer can improve hardness of sapphire substrate, and has stronger anti-scratch performance, and improves anti-cracking performance so as to effectively prolong service life of the display screen. The graphene film is coated on the sapphire substrate to form a protective layer so as to ensure toughness. DETAILED DESCRIPTION - The sapphire substrate is provided with a display main body that is made of organic LED display. INDEPENDENT CLAIMS are also included for the following: (1) a method for forming a protective layer in a display screen (2) a display screen (3) a display screen manufacturing method. DESCRIPTION OF DRAWING(S) - The drawing shows a front view of a protective layer.