Diffuser-integrated prism sheet for backlight units and method of manufacturing the same

Abstract

A diffuser-integrated prism sheet is provided. The prism sheet for backlight units includes a lower diffuser layer having a light diffusion structure, a lower layer formed on the lower diffuser layer, a first intermediate layer formed on the lower layer and having prism-shaped protrusions formed parallel to each other, a second intermediate layer formed on the first intermediate layer, an upper layer formed on the second intermediate layer, and an upper diffuser layer formed on the upper layer and having a light diffusion structure, wherein an air layer is formed between the lower surface of the second intermediate layer and the valleys of the prism-shaped protrusions of the first intermediate layer. Also, a method of manufacturing the diffuser-integrated prism sheet is provided.

1 . A diffuser-integrated prism sheet for backlight units, comprising:
 a lower diffuser layer, having a light diffusion structure formed on a lower surface thereof;   a lower layer, formed on an upper surface of the lower diffuser layer;   a first intermediate layer, formed on an upper surface of the lower layer and having a plurality of prism-shaped protrusions formed parallel to each other;   a second intermediate layer, formed on an upper surface of the first intermediate layer;   an upper layer, formed on an upper surface of the second intermediate layer; and   an upper diffuser layer, formed on an upper surface of the upper layer and having a light diffusion structure formed on an upper surface of the upper diffuser layer,   wherein an air layer is formed between a lower surface of the second intermediate layer and valleys of the prism-shaped protrusions of the first intermediate layer, and the first intermediate layer and the second intermediate layer are integrated with each other through fusion, and   wherein the light diffusion structure formed on the lower surface of the lower diffuser layer comprises a plurality of hemispherical protrusions for diffusing light.