Patent ID: 11966119
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical film for a display device, comprising:
a first refractive layer having an upper surface and a lower surface including first projections and second projections extending away from the lower surface in a first direction, the second projections having different heights than the first projections, the first projections having lateral sides with different angles of inclination that decrease in the first direction in which the lateral sides further from the lower surface have a lower angle of inclination than the lateral sides closer to the lower surface, and wherein a top surface of each of the first projections is a flat horizontal surface that has no inclination; and
a second refractive layer disposed directly on the upper surface of the first refractive layer, the second refractive layer having a refractive index different from that of the first refractive layer,
wherein the first projections and the second projections form a first lens pattern and a second lens pattern, respectively, each of which extends in a second direction different from the first direction on a plane,
wherein the first lens pattern extending in the second direction and the second lens pattern extending in the second direction are alternately arranged in a third direction crossing the second direction, the third direction different from the first direction,
wherein the first lens pattern and the second lens pattern each further extends in the third direction on a plane, and the first lens pattern extending in the third direction and the second lens pattern extending in the third direction are alternately arranged in the second direction, and
wherein the first lens pattern extending in the second direction, the second lens pattern extending in the second direction, the first lens pattern extending in the third direction, and the second lens pattern extending in the third direction are disposed in a same layer as each other in the first refractive layer.