High-brightness security film

Abstract

The present invention relates to a high-brightness security film in which light transmittance is improved so as to improve brightness and clarity, wherein, according to one aspect of the present invention, provided is a security film comprising: a base layer formed of a light-transmitting material; and a pattern layer comprising: light transmitting portions which are formed of a light-transmitting material through which light incident from the base layer is transmitted, and which are spaced apart at predetermined intervals; and shielding portions which are formed between the spaced-apart light transmitting portions and comprise a resin and shielding particles dispersed in the resin so as to block light incident through the base layer, wherein the pattern layer limits a viewing angle by transmitting some of the light incident from the base layer, wherein at least a portion of a surface of a light-incident surface side of the shielding portions is formed to be round so that light reflected from the surface of the light-incident surface side of the shielding portions is reflected toward the light transmitting portions.

Dependencies are inferred from the claim text.