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:
May. 26, 2009
Filed:
Dec. 16, 2004
Yasushi Sugimoto, Tsukuba, JP;
Teruo Teshima, Chikusei, JP;
Masato Taya, Tsukuba, JP;
Toshikatsu Shimazaki, Chikusei, JP;
Yasushi Sugimoto, Tsukuba, JP;
Teruo Teshima, Chikusei, JP;
Masato Taya, Tsukuba, JP;
Toshikatsu Shimazaki, Chikusei, JP;
Hitachi Chemical Company, Ltd., Tokyo, JP;
Abstract
A backlight device with improved efficiency in the utilization of light and a liquid crystal display device providing this backlight device are provided, the backlight device comprising at least a light sourcea light guide plateand a reflectorin which the light guide platefurther provides an entry faceinto which light from the light source is incident, a lower facesubstantially perpendicular to the entry faceand that opposes the reflectorand an upper facethat opposes the lower faceand reflective elementsthat are capable of reflecting such that light is emitted from the lower facetoward the reflectorare disposed on the upper faceof the light guide plate.