Patent ID: 11933476
Assignee: CREE LIGHTING USA LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H  G | IPC F

Claim 13:
14. A luminaire comprising:
an array of light emitting diodes; and
a lens positioned over the array of light emitting diodes, wherein the lens comprises a light receiving side including grooves for receiving light emitting diodes, the grooves arranged in a concentric format and extending continuously between the light emitting diodes in a radial direction and defined by a central refractive region and walls comprising total internal reflection faces, and a light extraction side opposite the light receiving side, the light extraction side comprising refractive extraction surfaces, total internal reflection extraction surfaces, or combinations thereof, wherein the refractive extraction surfaces, total internal reflection extraction surfaces or combinations thereof provide a bidirectional light distribution from the lens.