OPTICAL MEMBER, ILLUMINATION DEVICE, AND DISPLAY DEVICE
First Claim
1. An optical member, comprising:
- a base material that is transparent and has a sheet-like shape, one surface of the base material being a light-receiving surface where light enters and another surface thereof being a light-exiting surface where light exits;
an anisotropic light focusing part that is formed over the light-receiving surface of the base material and that exerts, on incident light, a light focusing effect in a light focusing direction along the light-receiving surface of the base material, but does not exert a light focusing effect in a non-light focusing direction along the light-receiving surface of the base material, said non-light focusing direction being perpendicular to said light focusing direction; and
an anisotropic light diffusing part that is formed over the light exiting surface of the base material and that diffuses and emits light from the anisotropic light focusing part, said anisotropic light diffusing part comprising anisotropic light diffusing particles having an elongated shape, a long-axis direction of said elongated shape being in the non-light focusing direction and a short-axis direction thereof being in the light focusing direction, thereby relatively increasing an amount of light diffused in the light focusing direction and relatively decreasing an amount of light diffused in the non-light focusing direction.
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Accused Products
Abstract
An optical sheet includes: a sheet-like base material having transparent characteristics; an anisotropic light focusing part that is formed over a light-receiving surface of the base material and that has light focusing anisotropy whereby a light focusing effect is exerted on incident light in a light focusing direction along the light-receiving surface but not in a non-light focusing direction along the light-receiving surface, the non-light focusing direction being perpendicular to the light focusing direction; and an anisotropic light diffusing part that is formed over a light exiting surface of the base material and that diffuses and emits light from the anisotropic light focusing part. The anisotropic light diffusing part is provided with anisotropic light diffusing particles that have an elongated shape and that are disposed such that a long-axis direction thereof is in the non-light focusing direction and a short-axis direction thereof is in the light focusing direction, thereby having light diffusion anisotropy such that the intensity of diffused light is relatively large in the light focusing direction and the intensity of diffused light in the non-light focusing direction is relatively small.
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Citations
10 Claims
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1. An optical member, comprising:
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a base material that is transparent and has a sheet-like shape, one surface of the base material being a light-receiving surface where light enters and another surface thereof being a light-exiting surface where light exits; an anisotropic light focusing part that is formed over the light-receiving surface of the base material and that exerts, on incident light, a light focusing effect in a light focusing direction along the light-receiving surface of the base material, but does not exert a light focusing effect in a non-light focusing direction along the light-receiving surface of the base material, said non-light focusing direction being perpendicular to said light focusing direction; and an anisotropic light diffusing part that is formed over the light exiting surface of the base material and that diffuses and emits light from the anisotropic light focusing part, said anisotropic light diffusing part comprising anisotropic light diffusing particles having an elongated shape, a long-axis direction of said elongated shape being in the non-light focusing direction and a short-axis direction thereof being in the light focusing direction, thereby relatively increasing an amount of light diffused in the light focusing direction and relatively decreasing an amount of light diffused in the non-light focusing direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification