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:
Mar. 22, 2011
Filed:
Aug. 22, 2007
Yuji Kodera, Ibaraki, JP;
Yukinori Yamada, Ibaraki, JP;
Nobuyasu Ishihara, Ibaraki, JP;
Shirou Hayashihara, Ibaraki, JP;
Yuji Kodera, Ibaraki, JP;
Yukinori Yamada, Ibaraki, JP;
Nobuyasu Ishihara, Ibaraki, JP;
Shirou Hayashihara, Ibaraki, JP;
Hitachi Maxell, Ltd., Ibaraki-shi, Osaka, JP;
Abstract
A micro lens array sheet includes a sheet type base and a plurality of micro lenses arranged on the base. The surface of each micro lens includes a convex part and a peripheral edge part. The convex part has a spherical or elliptical surface. The peripheral edge part is formed between the convex part and the base and curved in a concave shape. Since the surface of the peripheral edge part is curved in a concave shape, the flat part can be narrower than a conventional micro lens array sheet. Therefore, luminance unevenness attributable to the flat part can be suppressed.