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. 11, 2011
Filed:
Nov. 09, 2005
Osamu Iwasaki, Minami-ashigara, JP;
Osamu Iwasaki, Minami-ashigara, JP;
Fujifilm Corporation, Tokyo, JP;
Abstract
In order to provide a larger-sized light guide plate that is thin and lightweight and allows more uniform, less uneven and higher-luminance illuminating light to emit from a light exit surface, a sectional shape of each back surface of the rectangular light exit surface satisfies the following 10th-order function formula. X is a position from the origin in a direction parallel to the one side of the light guide plate, and Y is a position from the origin in a direction perpendicular to the one side. Y=A+A×X+A×X+A×X+A×X+A×X+A×X+A×X+A×X+A×X+A×X, −1.3×10≦A≦2.4×10, −2.0×10≦A≦9.4×10, −2.6×10≦A≦5.7×10, −5.5×10≦A≦2.2×10, −2.1×10≦A≦1.1×10, −3.7×10≦A≦2.2×10, −1.4×10≦A≦3.3×10, −3.6≦A≦1.5, −7.8×10≦A≦3.3×10, −1.2×10≦A≦3.2×10, −1.4×10≦A≦4.9×10. A planar lighting device includes the light guide plate, and a liquid crystal display apparatus includes the planar lighting device as a backlight unit.