Light emitting device with optical enhancement structure

摘要

A light emitting device with optical enhancement structure. The light emitting device includes a light emitting element and an optical enhancement structure. Some of the light from the light emitting element is emitted in a diverging manner. The optical enhancement structure is optically coupled to the light emitting element, said optical enhancement structure having a light emerging surface that includes a central surface that is orthogonal to the normal and corner surfaces having profiles that are not orthogonal to the normal. The optical enhancement structure is a single structure for changing the normal angle of the first light emerging surface to increase light output efficiency. The optical enhancement structure have an optical characteristic that directs diverging light from the light emitting element along a path within the optical enhancement structure in a direction towards a normal of the pixel.