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:
Jan. 20, 2004
Filed:
Sep. 26, 2001
Koji Mabuchi, Ogaki, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A surface light source device includes a linear light source, and a light emitted from the linear light source is incident onto one side surface of a light guide plate. The light is then emitted from an upper surface of the light guide plate. A display panel is provided so as to cover an upper surface of the light guide plate. The display panel has two display areas that its translucent rates are different each other. In addition, a light-shielding sheet is provided between the light guide plate and the display area to shield the light emitted from the light guide plate. A light-shielding effect of the light guide plate deteriorates with to a distance from the side surface of the light guide plate, and a luminance irregularity of the light emitted from the light guide plate is absorbed in the light-shielding sheet.