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:
Sep. 20, 2011
Filed:
May. 15, 2007
Kazuhiro Yamada, Osaka, JP;
Takamasa Tamura, Osaka, JP;
Motonobu Yoshikawa, Osaka, JP;
Hiroshi Yamaguchi, Osaka, JP;
Kazuhiko Ishimaru, Osaka, JP;
Kazuhiro Yamada, Osaka, JP;
Takamasa Tamura, Osaka, JP;
Motonobu Yoshikawa, Osaka, JP;
Hiroshi Yamaguchi, Osaka, JP;
Kazuhiko Ishimaru, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A diffusing plate has a surface including a plurality of fine concave/convex portions regularly arranged within a cycle equal to or smaller than a predetermined wavelength. The surface has a larger surface roughness than the predetermined wavelength. An average value for an angle between a normal vector of the tangent plane of a roughness shape of the surface and a normal vector of a reference plane of the surface is 5 degrees or more.