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:
Apr. 17, 2001
Filed:
Oct. 04, 1999
Hideaki Nagakubo, Fukushima-ken, JP;
Mitsuaki Yamazaki, Fukushima-ken, JP;
Satoshi Matsubara, Fukushima-ken, JP;
Ryohei Kakuta, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A liquid crystal display device contains a liquid crystal panel and a light transmission member disposed below the liquid crystal panel. A reflection sheet is disposed below the light transmission member and a light source is disposed adjacent to one end of the light transmission member. A reflector encases the light source. The periphery of the reflector has reflection walls and forms an opening continuous with the reflection walls. Light direction control walls are formed near the opening of the reflector to control the direction of the light from the light source. The light direction control walls cut off light directed in directions other than a predetermined set of directions. An inner surface of the light direction control walls is composed of reflection layers formed from a different material from the material that forms the reflection walls.