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. 20, 2015
Filed:
Jun. 13, 2012
Ryuzo Yuki, Osaka, JP;
Takeshi Ishida, Osaka, JP;
Fumie Kunimasa, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
Provided is an illumination device for obtaining planar light having satisfactory uniformity and suppressed brightness irregularities. A backlight unit (illumination device) () comprises a light source and a light-guiding element () for guiding light from the light source. The light-guiding element () includes prisms () formed in an end area () on the light source side, and prisms () formed in an area (a light-emitting area ()) on the side opposite the light source relative to the end area (). The prisms () vary the propagation angle of light spreading in a direction intersecting the direction of light entry, more so than the prisms ().