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:
Aug. 31, 2004
Filed:
Feb. 27, 2001
Kozo Fujino, Osaka, JP;
Vladimir Victrovich Serikov, Osaka, JP;
Shinji Kawamoto, Osaka, JP;
Masafumi Taguchi, Osaka, JP;
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Abstract
A light guide is provided at the reverse side thereof with triangular uneven surfaces at a predetermined pitch. The uneven surfaces are integrally formed with the light guide when the latter is injection-molded. Incident light from a light incident plane is caused to be scattered at uneven surfaces within the light guide and to spread in a main scanning direction. The light scattered is emitted from an emission plane. Intensity of light in the main scattering direction can be made uniform by lengthening the uneven surfaces as the uneven surfaces extend from the light incident plane. A position where the light intensity becomes maximum in a sub-scanning direction can be changed by adjusting an angle between the ridgeline of the uneven surfaces and the sub-scanning direction, and distributed characteristics of the light intensity in the sub-scanning direction can be also changed.