Refractive Encapsulation Structure for Higher Light Extraction Displays

The patent combines multiple optical functions into a single integrated encapsulation layer structure. The encapsulation layer simultaneously provides light extraction enhancement through its refractive index properties, protective enclosure for the light-emitting element, and structural support. This merging of functions reduces the total number of separate optical layers while maintaining or improving light extraction efficiency.

The encapsulation layer is designed to perform multiple functions: it serves as a protective barrier, a structural support element, and an optical enhancement component through its specific refractive index characteristics. By making the encapsulation layer multi-functional, the patent eliminates the need for separate dedicated layers for each function, thereby reducing overall device complexity.

The patent utilizes the refractive index parameter as a key design variable to optimize light collection efficiency. By selecting materials with specific refractive index values for the encapsulation layer and low refractive pattern layer, the design creates an optical gradient that enhances light extraction. The refractive index difference is controlled within practical manufacturing tolerances rather than requiring extreme precision.

The patent employs composite material structures where the encapsulation layer and low refractive pattern layer are made from different materials with complementary optical properties. This allows the system to achieve the desired refractive index gradient through material selection rather than requiring precise control of a single material's properties, thereby reducing manufacturing precision requirements.