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:
Nov. 29, 2011
Filed:
Aug. 26, 2008
Yoshiaki Takahashi, Chiba, JP;
Masayuki Mifune, Mobara, JP;
Hiroshi Nakamoto, Chiba, JP;
Michihide Shibata, Mutsuzawa, JP;
Akiyoshi Tobe, Mobara, JP;
Yoshiaki Takahashi, Chiba, JP;
Masayuki Mifune, Mobara, JP;
Hiroshi Nakamoto, Chiba, JP;
Michihide Shibata, Mutsuzawa, JP;
Akiyoshi Tobe, Mobara, JP;
Hitachi Displays, Ltd., Chiba, JP;
Abstract
In a backlight which arranges light emitting diodes on a side surface of a light guide plate, irregularities of radiation light from the backlight can be decreased. In a liquid crystal display device having a backlight which radiates light to a liquid crystal panel, LEDs which constitute a light emitting element are mounted on a light guide plate formed on the backlight, and teardrop-shaped lenses are formed on a light radiation surface of the light guide plate. By changing the advancing directions of lights radiated from the light emitting element using the teardrop-shaped lenses, it is possible to decrease irregularities of a planar light source by scattering the radiation lights from the light guide plate.