Patent ID: 9568650
Date: 2017-02-14
CPC Classifications: G02B

Claim:
1. A privacy securing film comprising: a louver film consisting of transparent layers and opaque layers arranged and laminated alternately in a lengthwise direction of the louver film, wherein: each opaque layer is formed as a separation layer that separates two adjacent transparent layers from each other, such that the two adjacent transparent layers are entirely apart and disconnected from each other by a thickness of said each opaque layer interposed therebetween; each opaque layer is made of light-absorbing beads having a mean diameter of 0.2 to 20 micrometers and a binder bonding said beads each other, the binder being disposed through the entire thickness of each opaque layer; and an interface is formed between the opaque layers and the transparent layers, the interface includes a first portion at which said beads are in contact with the transparent layers and a second portion at which the binder is in contact with the transparent layers, and a micro-roughness formed at the interface between the transparent layer and the opaque layer due to the presence of said beads.