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. 11, 2009
Filed:
Aug. 27, 2007
Takashi Nishihara, Soka, JP;
Hideaki Homma, Ashikaga, JP;
Yusuke Tochigi, Tokyo, JP;
Shigetomo Sakakibara, Koshigaya, JP;
Takashi Nishihara, Soka, JP;
Hideaki Homma, Ashikaga, JP;
Yusuke Tochigi, Tokyo, JP;
Shigetomo Sakakibara, Koshigaya, JP;
Toppan Printing Co., Ltd., Tokyo, JP;
Abstract
An optical device includes a plastic-based film and a diffusing layer. The diffusing layer includes inner scattering elements that selectively scatter visible light having a wavelength range, and has pencil hardness of more than 2H under a 500 g-load specified in ISO/DIS 15184. When the optical device is arranged at a front side of a liquid crystal display apparatus that displays color near 8 test colors specified in CIE 1974, as a test color, chrominance Δu'v′ of less than 0.05 is obtained based on a chromaticity coordinate (u′, v′) of CIE1976UCS observed in the front surfaceAof the liquid crystal display apparatus and a chromaticity coordinate (u′, v′) observed at an observation angle of ±60 degrees in horizontal and vertical directions of a screen of the liquid crystal display apparatus when a direction perpendicular to the screen is assumed to be 0 degrees.