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:
Feb. 16, 2010
Filed:
Nov. 28, 2005
Ken Saito, Mobara, JP;
Shigeo Shimano, Chosei, JP;
Hiroshi Nakamoto, Chiba, JP;
Hiroyuki Yoshida, Mobara, JP;
Hirokazu Yabe, Mobara, JP;
Toshitsugu Miyawaki, Chonan, JP;
Akiyoshi Tobe, Mobara, JP;
Ken Saito, Mobara, JP;
Shigeo Shimano, Chosei, JP;
Hiroshi Nakamoto, Chiba, JP;
Hiroyuki Yoshida, Mobara, JP;
Hirokazu Yabe, Mobara, JP;
Toshitsugu Miyawaki, Chonan, JP;
Akiyoshi Tobe, Mobara, JP;
Hitachi Displays, Ltd., Chiba-ken, JP;
Abstract
A liquid crystal display device includes a liquid crystal panel and an illumination device. The illumination device has a light guide plate and at least one spot light source on at least one side surface of the light guide plate. The light guide plate includes a large number of upper-surface arcuate cross-sectional grooves in a direction orthogonal to the one side surface on a surface thereof which faces the liquid crystal panel, and a large number of light-incident-surface arcuate cross-sectional grooves are formed in a thickness direction of the light guide plate on at least a portion of the one side surface which faces a position at which the spot light source is arranged. A relationship is provided between a contact angle Oa of the upper-surface arcuate cross-sectional grooves and a contact angle Ea of the light-incident-surface arcuate cross-sectional grooves.