Graphene Encapsulation for Thin Bezel Displays

The patent uses a composite encapsulation structure consisting of an inorganic encapsulation layer (first and second inorganic layers) combined with an organic encapsulation layer. This composite structure provides effective moisture and oxygen barrier properties while maintaining process simplicity. The inorganic layers provide the primary barrier function, while the organic layer provides planarization and additional protection, achieving both high reliability and ease of manufacture.

The patent replaces the rigid frit-based edge seal with a flexible thin film encapsulation structure. The inorganic encapsulation layers are formed as thin films that can flex and accommodate external shocks without cracking, while still providing effective moisture and oxygen barrier properties. This thin film approach is also suitable for large display panels where rigid seals would be difficult to implement.

The patent merges the formation of multiple inorganic encapsulation layers into a single continuous manufacturing process. The first inorganic layer, organic encapsulation layer, and second inorganic layer are formed in sequence without breaking the process, allowing simultaneous completion of all encapsulation layers. This integrated approach significantly reduces manufacturing time compared to separate formation processes while maintaining the protective benefits of multiple layers.

The patent applies different refractive index materials at different locations and layers to optimize both moisture protection and light extraction. The inorganic encapsulation layers have higher refractive indices than the organic layer, creating refractive index differences that reduce light trapping at specific interfaces. This local optimization of material properties at different encapsulation interfaces improves light extraction efficiency while maintaining the moisture barrier function throughout the encapsulation structure.