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:
Jul. 24, 2012
Filed:
Oct. 23, 2007
Hideki Fujii, Shiga, JP;
Kazunori Tanaka, Shiga, JP;
Masahiro Okuda, Shiga, JP;
Toray Industries, Inc., , JP;
Abstract
A white polyester film for a liquid crystal display reflective plate realizes a high level of brightness when used in side light type liquid crystal displays and direct type liquid crystal displays. The white polyester film for a light reflective plate has a thickness of 200 μm or more, wherein, in at least one side (side A) of the white polyester film, M is M≦−0.0110 (%/nm) and R560≧100 (%) when the wavelength dependency of spectral reflectance at a wavelength of 450 to 600 nm is approximated according to the following approximation formula R:in which R is an approximation formula by a least square method and represents a light reflectance (%), λ represents a wavelength of light (nm), M represents a wavelength coefficient (%/nm), B represents a constant (%), and R560 represents an estimated reflectance obtained by introducing λ=560 nm into the approximation formula R (%).