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. 16, 2007
Filed:
Aug. 15, 2003
Toshihiro Suzuki, Kawasaki, JP;
Tetsuya Hamada, Kawasaki, JP;
Mari Sugawara, Kawasaki, JP;
Tetsuya Kobayashi, Kawasaki, JP;
Keiji Hayashi, Kawasaki, JP;
Toshihiro Suzuki, Kawasaki, JP;
Tetsuya Hamada, Kawasaki, JP;
Mari Sugawara, Kawasaki, JP;
Tetsuya Kobayashi, Kawasaki, JP;
Keiji Hayashi, Kawasaki, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A lighting unit and a liquid crystal display device which can improve the efficiency of usable light. The lighting unit includes a light source, a light guide plate, and a truncated pyramid located between the light guide plate and the light source. The truncated pyramid has a base, a top smaller than the base, and a slope linking the base and the top. The light source is placed in close contact with the top of the truncated pyramid, and the light guide plate is placed in close contact with the base of the truncated pyramid. Light is propagated from a light emitting part of the light source to the light guide plate without passing through any air layer. Also, an unnecessary light removing structure is provided in the light guide plate near the incidence surface thereof.