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. 22, 2015
Filed:
Sep. 15, 2011
Takashi Kuroda, Moriya, JP;
Keiko Kitano, Musashino, JP;
Akinobu Ushiyama, Moriya, JP;
Hiroshi Kojima, Kawagoe, JP;
Takashi Kuroda, Moriya, JP;
Keiko Kitano, Musashino, JP;
Akinobu Ushiyama, Moriya, JP;
Hiroshi Kojima, Kawagoe, JP;
Dai Nippon Printing Co., Ltd., Shinjuku-Ku, JP;
Abstract
An optical sheet including a body portion, unit optical elements arranged on one surface of the body portion, and an uneven coating having an uneven surface with micro-protrusions, provided on the other surface of the body portion. When the hardness He of the optical element surface Pe and the hardness Hm of the uneven coating surface Pm are evaluated in terms of the pencil hardness measured in accordance with JIS K5600-5-4 (1999) (load: 1000 g; speed: 1 mm/s), the hardness Hm is not less than the hardness He (hardness Hm≧hardness He) and the hardness Hm is preferably not less than F. Further, the hardness He and the hardness Hm preferably satisfy the following relation:hardness+3≧hardness≧hardness2