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:
Oct. 18, 2005
Filed:
Oct. 23, 2003
Toru Kunimochi, Iwata-gun, JP;
Satoshi Kawashima, Iwata-gun, JP;
Kazutoshi Takayanagi, Iwata-gun, JP;
Shun Kurebayashi, Iwata-gun, JP;
Toru Kunimochi, Iwata-gun, JP;
Satoshi Kawashima, Iwata-gun, JP;
Kazutoshi Takayanagi, Iwata-gun, JP;
Shun Kurebayashi, Iwata-gun, JP;
Minebea Co., Ltd., Nagano, JP;
Abstract
In a spread illuminating apparatus comprising a light conductive plate, and at least one spot-like light source disposed close to a light entrance surface thereof, the light conductive plate has, on its light exit surface, a light scattering means comprising a plurality of mechanisms which are each formed so as to extend in a direction perpendicular to the light entrance surface, and which are adapted to scatter the light emitted from the at least one spot-like light source with respect to the direction parallel to the light entrance surface. The mechanisms of the light scattering means each consist of either paired slanting surfaces, a ridge with its surface arced in cross section, or a ridge multifaceted forming a polygonal cross section. The surfaces of the mechanisms may be roughened with a plurality of grooves, thereby achieving a further uniform illumination.