Optical sheet
First Claim
1. An optical sheet capable of transmitting upwards a light beam entering the optical sheet from below, said optical sheet comprising:
- a light beam controlling section formed of first rectangular areas and second rectangular areas, each of the first rectangular areas being square or rectangle in cross section, the first rectangular areas being arranged in parallel to each other, each of the second rectangular areas being square or rectangle in cross section, the second rectangular areas being arranged in parallel to each other, in said light beam controlling section, the first and second rectangular areas being alternate in the lateral direction, the first rectangular area being formed of a material having a refractive index that is higher than that of a material of the second rectangular area.
1 Assignment
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Accused Products
Abstract
An optical sheet according to the present invention is an optical sheet which is capable of transmitting upwards a light beam entering the optical sheet from below and which comprises a light beam controlling section formed of first rectangular areas and second rectangular areas, each of the first rectangular areas being square or rectangle in cross section, the first rectangular areas being arranged in parallel to each other, each of the second rectangular areas being square or rectangle in cross section, the second rectangular areas being arranged in parallel to each other. The first and second rectangular areas are alternate in the lateral direction. The first rectangular area is formed of a material having a refractive index that is higher than that of a material of the second rectangular area.
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Citations
16 Claims
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1. An optical sheet capable of transmitting upwards a light beam entering the optical sheet from below, said optical sheet comprising:
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a light beam controlling section formed of first rectangular areas and second rectangular areas, each of the first rectangular areas being square or rectangle in cross section, the first rectangular areas being arranged in parallel to each other, each of the second rectangular areas being square or rectangle in cross section, the second rectangular areas being arranged in parallel to each other, in said light beam controlling section, the first and second rectangular areas being alternate in the lateral direction, the first rectangular area being formed of a material having a refractive index that is higher than that of a material of the second rectangular area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An optical sheet capable of transmitting upwards a light beam entering the optical sheet from below, said optical sheet comprising:
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a light beam controlling section formed of rectangular areas and light diffusion areas, each of the rectangular areas being square or rectangle in cross section, the rectangular areas being arranged in parallel to each other, each of the light diffusion areas being square or rectangle in cross section, the light diffusion areas being arranged in parallel to each other, in said light beam controlling section, the light diffusion area being formed of beads and a binder into which the beads are dispersed, the binder being formed of a material having a refractive index that is lower than that of a material of the rectangular area, the beads and the binder being formed of materials having different refractive indexes from each other, the rectangular areas and the light diffusion areas being alternate in the lateral direction, - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification