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. 23, 2010
Filed:
Oct. 28, 2008
Masato Taya, Chikusei, JP;
Tokutarou Komatsu, Abiko, JP;
Yasushi Sugimoto, Tsukuba, JP;
Tadashi Okuda, Chikusei, JP;
Teruo Teshima, Nasu-machi, JP;
Masato Taya, Chikusei, JP;
Tokutarou Komatsu, Abiko, JP;
Yasushi Sugimoto, Tsukuba, JP;
Tadashi Okuda, Chikusei, JP;
Teruo Teshima, Nasu-machi, JP;
Hitachi Chemical Co., Ltd., Tokyo, JP;
Abstract
A backlight unit includes: light guide plate surrounded by main surfaces and end surfaces, one end surface facing a light source designated as entrance surface, one main surface designated as emitting surface; first prism sheet provided above the light guide plate, having first prism columns on a top surface and second prism columns on a bottom surface, each first prism column has first ridge line parallel or perpendicular to the entrance surface, each second prism column has second ridge line extending in a different direction from the first ridge line; second prism sheet provided above the first prism sheet, having third prism columns abutting each other on a top surface, each third prism column has third ridge line extending in a direction different from the first and second ridge lines; and reflection sheet facing the light guide plate below the light guide plate.