OLED Display Panel Refraction Structure for Large-Angle Light Extraction

The light-extraction layer is divided into multiple functional sub-layers: a cushion layer with curved surface for initial light deflection, a first refracting layer for further refraction, and a second refracting layer for additional light extraction. This segmentation allows each layer to perform a specific function in the light extraction process, progressively improving light output efficiency without overwhelming structural complexity

The cushion layer is designed with a curved surface that protrudes toward the light-emitting surface, adding a three-dimensional geometric dimension to the otherwise planar panel structure. This curvature creates variable incident angles for trapped light, enabling large-angle light to be deflected toward the front view direction and extracted from the panel

The light-extraction layer is designed as a multi-functional structure where the cushion layer provides both mechanical cushioning and optical refraction functions, while the first and second refracting layers work together to progressively extract light at different angles. This multi-functionality reduces the need for separate dedicated components for each function, managing structural complexity while achieving comprehensive light extraction

The light-extraction layer employs composite material design with different refractive indices for the cushion layer, first refracting layer, and second refracting layer. This composite structure creates optimal refraction conditions at each interface, enabling efficient light extraction while maintaining a unified integrated layer structure rather than separate components