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AssigneeOMRON Corporation
InventorsMotohiko Matsushita, Akihiro Funamoto, Shigeru Aoyama, Yuki Matsui, Kenji Kawato
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The present invention provides an optical film having a diffusion pattern that can diffuse light and direct at least a part of incident light vertically to the surface of the optical film. Further, the present invention provides an optical film having both a function of a prism sheet and a function of a diffusion sheet. Plural diffusion patterns 28 are formed on a light-incident surface of an optical film 23, while plural prisms 27 are formed on a light-emitting surface. The diffusion patterns 28 have, in at least one section thereof, a main inclined surface 29 that is curved face with a relatively small inclination and an auxiliary inclined surface 30 that is oppositely inclined to the main inclined surface 29 with a relatively large inclination.
An optical film having plural diffusion patterns formed on a light-incident surface and plural prisms formed on a light-emitting surface, wherein each of the diffusion patterns has, in at least one section thereof, a first inclined surface that is curved with a relatively small inclination and a second inclined surface that is oppositely inclined to the first inclined surface with a relatively great inclination.
A diffusion sheet having plural diffusion patterns formed thereon, wherein each of the diffusion patterns has, in at least one section thereof, a first inclined surface that is curved with a relatively small inclination and a second inclined surface that is oppositely inclined to the first inclined surface with a relatively great inclination.
A reflector having plural diffusion patterns formed on a light-reflecting surface, wherein each of the diffusion patterns has, in at least one section thereof, a first inclined surface that is curved with a relatively small inclination and a second inclined surface that is oppositely inclined to the first inclined surface with a relatively great inclination.
Dependencies are inferred from the claim text.