Patent ID: 11029553

Abstract:
An optical composite film includes a first optically-uniaxial optical film layer, a second optically-uniaxial optical film layer, and a reflection grating film layer. The first optically-uniaxial optical film layer includes a plate-shaped portion and a plurality of refraction portions disposed on a side of the plate-shaped portion, the plurality of refraction portions is selected from a type of camber columns and quadrangular prisms, the second optically-uniaxial optical film layer is stacked on a side of the plate-shaped portion close to the refraction portion, an extraordinary light refractive index of the first optically-uniaxial optical film layer is greater than an ordinary light refractive index of the second optically-uniaxial optical film layer, and a material of the first optically-uniaxial optical film layer is the same as a material of the second optically-uniaxial optical film layer.