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:
Dec. 20, 2011
Filed:
Mar. 19, 2009
Naotada Okada, Kanagawa-ken, JP;
Kazuo Horiuchi, Kanagawa-ken, JP;
Haruhiko Okumura, Kanagawa-ken, JP;
Takashi Sasaki, Kanagawa-ken, JP;
Naotada Okada, Kanagawa-ken, JP;
Kazuo Horiuchi, Kanagawa-ken, JP;
Haruhiko Okumura, Kanagawa-ken, JP;
Takashi Sasaki, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A reflective screen includes: a substrate having a first refractive index; and a periodic structure provided on a major surface of the substrate and including a periodic film which has a period Λ and is made of a material having a second refractive index that is higher than the first refractive index. The period Λ is not less than 400/(N+1) nm and not more than 680/(N−1) nm, where N is an equivalent refractive index of the periodic film.