Light diffusion film, surface light source unit, and liquid crystal display

A surface light source unit comprising:

• a direct-type surface light source member containing a plurality of light sources that are arranged in parallel and a reflector surrounding these light sources, having an opening on the light-emerging side and a light-reflecting face on its inner surface,
• a light diffusion film placed on the light-emerging side of the direct-type surface light source member, and
• a lens film placed on the light-emerging side of the light diffusion film,
• the light diffusion film comprising:
• a transparent substrate, and
• a light-diffusing layer provided at least on one surface of the transparent substrate either directly or through another layer,
• the light-diffusing layer comprising an ionizing radiation curing resin and an ultraviolet light absorber and having, on its surface, fine irregularities that have the function of diffusing light.

A liquid crystal display comprising:

• a surface light source unit, and
• a liquid crystal display panel placed on the light-emerging side of the surface light source unit,
• the surface light source unit comprising:
• a direct-type surface light source member containing a plurality of light sources that are arranged in parallel and a reflector surrounding these light sources, having an opening on the light-emerging side and a light-reflecting face on its inner surface,
• a light diffusion film placed on the light-emerging side of the direct-type surface light source member, and
• a lens film placed on the light-emerging side of the light diffusion film,
• the light diffusion film comprising:
• a transparent substrate, and
• a light-diffusing layer provided at least on one surface of the transparent substrate either directly or through another layer,
• the light-diffusing layer comprising an ionizing radiation curing resin and an ultraviolet light absorber and having, on its surface, fine irregularities that have the function of diffusing light.