Patent ID: 8253154

Claim:
A lens for a light emitting diode package that covers a light emitting diode chip mounted in a package body, the lens comprising: a plurality of refractive lenses each having a sub-radius of curvature smaller than one main radius of curvature of an outer surface of the lens protruding above the package body, and raised on the outer surface of the lens along the main radius of curvature, wherein a ratio of the sub-radius of curvature to the main radius of curvature of the refractive lenses satisfies the following equation, 2√{square root over (2)} <R/r, where R is a main radius of curvature, and r is a sub-radius of curvature, and wherein a distance between the refractive lenses arranged in a fly's eye pattern and the sub-radius of curvature of the refractive lenses satisfy the following equation, d=r/ 2 Equation 2, wherein d is a distance between refractive lenses, and r is a sub-radius of curvature.