| US 7,480,097 B2 | ||
| Light diffusion sheet and method of producing the light diffusion sheet, and screen | ||
| Tsutomu Nagahama, Miyagi (Japan); Hiroyuki Kiso, Miyagi (Japan); and Yukio Miyaki, Kanagawa (Japan) | ||
| Assigned to Sony Corporation, Tokyo (Japan) | ||
| Filed on Aug. 02, 2005, as Appl. No. 11/195,931. | ||
| Claims priority of application No. P2004-227543 (JP), filed on Aug. 04, 2004. | ||
| Prior Publication US 2006/0040204 A1, Feb. 23, 2006 | ||
| Int. Cl. G03B 21/56 (2006.01); G03B 21/60 (2006.01) | ||
| U.S. Cl. 359—449 [359/454; 359/460] | 10 Claims |
| 1. 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.
|