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. 14, 2010
Filed:
Jan. 06, 2009
Naoki Tatehata, Kyoto, JP;
Yousuke Chikahisa, Hyogo, JP;
Tsutomu Aisaka, Osaka, JP;
Koji Tanabe, Osaka, JP;
Hirotoshi Watanabe, Osaka, JP;
Naoki Tatehata, Kyoto, JP;
Yousuke Chikahisa, Hyogo, JP;
Tsutomu Aisaka, Osaka, JP;
Koji Tanabe, Osaka, JP;
Hirotoshi Watanabe, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A light-guide sheet includes a light transmissive film substrate, and luminescent protrusions formed at predetermined points on the substrate. At least one of the substrate and each of the luminescent protrusions is colored to a color tone that absorbs yellow light more than blue light. Alternatively, a reflective layer colored to a color tone that absorbs yellow light more than blue light is provided on at least one of the top and bottom faces of the substrate.