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. 03, 2004
Filed:
Jul. 30, 2002
Koji Mabuchi, Gifu, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A surface light source device includes a light guide plate disposed on an upper surface of a liquid crystal panel unit and a linear light source disposed extending in a direction parallel to a side surface of the light guide plate. A plurality of linear prisms are formed on an upper surface of the light guide plate in a manner of extending in a direction oblique to the side surface. A light irradiated from the linear light source to the light guide plate through the side surface is reflected by a reflecting surface formed by each of linear prisms to be irradiated onto the liquid crystal panel unit provided below a lower surface of the plate. A height of the reflecting surface of each of linear prisms is changed in a lengthwise direction thereof.