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. 24, 2012
Filed:
Dec. 21, 2009
Shin-ichi Wakabayashi, Osaka, JP;
Seiji Nishiwaki, Hyogo, JP;
Masa-aki Suzuki, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A sheet of the present invention is a sheet which is to be used such that light from a light emitting body impinges on one of surfaces of the sheet and outgoes from the other surface. The other surface of the sheet includes a plurality of minute regions, a largest inscribed circle of the minute regionshaving a diameter from 0.2 μm to 2 μm. Each of the plurality of minute regionsis adjoined by and surrounded by some other ones of the plurality of minute regions. The plurality of minute regionsinclude a plurality of minute regionswhich are randomly selected from the plurality of minute regionsso as to constitute 20% to 80% of the minute regionsand a plurality of minute regionswhich constitute the remaining portion of the minute regions. Light transmitted through the plurality of minute regionsand light transmitted through the plurality of minute regionshave a phase difference of π.