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US 7,480,097 B2Granted
Light diffusion sheet and method of producing the light diffusion sheet, and screen
AssigneeSony Corporation
InventorsTsutomu Nagahama, Hiroyuki Kiso, Yukio Miyaki
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Abstract
A light diffusion sheet, a method of producing a light diffusion sheet, and a screen using the light diffusion sheet, are provided. The method of producing a light diffusion sheet includes transferring an uneven form of a surface of a mold to form a light diffusion layer having an uneven surface; and repeating the transferring step twice or more to stack two layers or more of the light diffusion layers on a substrate.
Claims10
A light diffusion sheet comprising:
- a substrate;
- and
- at least two light diffusion layers each having a continuously uneven surface stacked directly on the substrate,
- wherein at least one light diffusion layer is anisotropic in diffusion property in longitudinal and lateral directions, and a luminance peak is at an angle in the direction of a middle portion of the light diffusion sheet and the angle is continuously increased in the direction from the middle portion to a periphery portion of the light diffusion sheet.
1 more element
A light diffusion sheet comprising:
- a base material capable of transmitting light and diffusing the transmitted light;
- and
- a light diffusion layer, formed directly on the base material, having a continuously uneven surface,
- wherein the light diffusion sheet is anisotropic in diffusion property in perpendicular and horizontal directions, and a luminance peak is at an angle in the direction of a middle portion of the light diffusion sheet and the angle is continuously increased in the direction from the middle portion to a periphery portion of the light diffusion sheet.
1 more element
Dependencies are inferred from the claim text.