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:
Jan. 13, 2009
Filed:
Oct. 15, 2004
Sayuri Fujiwara, Nara, JP;
Kiyoshi Minoura, Nara, JP;
Sayuri Fujiwara, Nara, JP;
Kiyoshi Minoura, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A reflective display includes a retroreflective layer and a modulation layer, which is provided closer to a viewer than the retroreflective layer is and which is switchable between first and second states with mutually different optical characteristics. The retroreflective layer includes a two-dimensional arrangement of unit elements, which are arranged at a pitch of at most 250 μm. The retroreflective layer has a retro-reflectivity Rr of at least 45%. The retroreflectivity is defined as a ratio of the intensity of light, which has been reflected from the retroreflective layer and then received at a cone angle of 7.5 degrees by a retroreflectivity measuring system, to that of light, which has been reflected from a dielectric mirror and then received by the same retroreflectivity measuring system.