Lintec Corporation

Tohoku University

Hideo Fujikake

Satoru Shoshi

Baku Katagiri

Kentaro Kusama

Tomoo Orui

Takahiro Ishinabe

An optical-diffusion film for display which, particularly when applied to a display device using a collimated backlight as a backlight for the display panel, can efficiently diffuse and emit a highly directional light emitted from the collimated backlight toward the front of the display device as image display light, without allowing straight transmission of the highly directional light, and a display device using the optical-diffusion film for display are provided. Disclosed is a single layered optical-diffusion film having a columnar structure in which plural pillar-shaped objects having a relatively high refractive index are arranged to stand close together in a film thickness direction in a region having a relatively low refractive index, in which the film thickness of the optical-diffusion film has a value within the range of 60 to 700 &#x3bc;m, and the haze value obtainable in the case in which light is made incident in the normal line direction of the film plane has a value of 80% or more.

Optical-diffusion film for display and display device using same

Provided are an optical-diffusion film for display which, particularly when applied to a reflective display device, can efficiently diffuse and emit an external light incident from a wide range of angles toward the front of the display device as image display light, and a reflective display device using the optical-diffusion film. Disclosed is an optical-diffusion film for display, which is a single-layered optical-diffusion film obtained by photocuring a composition for optical-diffusion film including two or more kinds of polymerizable compounds having different refractive indices, and in which the film thickness of the optical-diffusion film has a value within the range of 60 to 700 &#x3bc;m, and when a coating layer formed by applying a composition for optical-diffusion film in a film form is photocured, and the incident angle of incident light with respect to the normal line of the film plane is varied in the range of &#x2212;70&#xb0; to 70&#xb0; along the travel direction of the coating layer at the time of photocuring, the haze value at each incident angle has a value of 70% or more.

Optical-diffusion film for display and reflective display device using same

Growing community of inventors

Sendai, Japan

Hideo Fujikake