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:
Aug. 10, 2010
Filed:
Aug. 23, 2007
Hideki Etori, Saitama, JP;
Hideki Etori, Saitama, JP;
Kimoto Co., Ltd., , JP;
Abstract
A light control film having a refractive index n and an uneven, irregular surface pattern provides a reasonable level of light diffusion without a glare problem provided, for any cross-section perpendicular to the base plane of the film, the average of absolute values of slope θof a curve along the edge of the cross-section contoured by the rough surface pattern (profile curve) is at least 78-34 n degrees and no higher than 118-34 n degrees, or the average of absolute values of slope θof a profile curve to the length Lof a straight line defined by the intersection of the base plane and the cross-section satisfies the following formula (3) or (4) for substantially all cross-sections.θ÷Lr×n≧40  (3)50≦θ×Lr×n≦135  (4)