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

Claim 17:
18. A display device, comprising:
a display panel having a display surface; and
an optical film comprising a first refractive layer disposed on the display surface, and a second refractive layer disposed on the first refractive layer and having a refractive index different from that of the first refractive layer, wherein the first refractive layer has 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 away from the lower surface 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,
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 extending in the third direction and the second lens pattern extending in the third direction each further extends in the third direction on a plane, and the first lens pattern and the second lens pattern 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.