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:
Jun. 27, 2006
Filed:
Mar. 01, 2004
Atsushi Kitamura, Iwata-gun, JP;
Motoji Egawa, Iwata-gun, JP;
Atsushi Kitamura, Iwata-gun, JP;
Motoji Egawa, Iwata-gun, JP;
Minebea Co., Ltd., Nalano-Ken, JP;
Abstract
A spread illuminating apparatus comprises a plurality of LED's as light sources, a light conductive plate, and a light controlling means disposed between the LED's and the light conductive plate. The light controlling means includes a plurality of transparent resin films which have respective different refractive indexes, which are laminated over one another in a direction parallel to a major surface as a light exit surface of the light conductive plate thereby forming a refractive index profile in the direction parallel to the light exit surface of the light conductive plate, and two adjacent ones of which are put together by adhesive that can transmit light emitted from the LED.