The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 2014
Filed:
Dec. 21, 2007
Kenji Kato, Tokyo, JP;
Katsushige Hayashi, Tokyo, JP;
Jun Yokoyama, Tokyo, JP;
Mitsuo Miura, Saitama, JP;
Tsutomu Nara, Saitama, JP;
Kenji Kato, Tokyo, JP;
Katsushige Hayashi, Tokyo, JP;
Jun Yokoyama, Tokyo, JP;
Mitsuo Miura, Saitama, JP;
Tsutomu Nara, Saitama, JP;
MGC Filsheet Co., Ltd., Saitama, JP;
Mitsubishi Gas Chemical Company Inc., Tokyo, JP;
Abstract
The present invention can provide a polymer film having an Ra (arithmetic average roughness) of 0.5 μm to 2.5 μm, an Ry (maximum height) of 3 μm to 11 μm, an Rz (ten-point average height) of 3 μm to 8 μm, and a light transmittance of 85% or higher. A preferable embodiment of the present invention can provide, at the same time, an optical diffusion function, an improved luminance, a transmittance and the like which are of a sufficient level not realized conventionally. In a still preferable embodiment, Sm (average concave-concave/convex-convex interval) of 90 μm to 160 μm and the average inter-local peak interval (S) is 5 μm to 15 μm.