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. 11, 2013
Filed:
Sep. 09, 2011
Yuhsaku Ajichi, Osaka, JP;
Takeshi Masuda, Osaka, JP;
Yuhsaku Ajichi, Osaka, JP;
Takeshi Masuda, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A tandem type backlight comprises plural light-emitting units () including at least one point light source () and a light guide plate () for causing light from the at least one point light source to be diffused and surface-emitted. In each of the light-emitting units (), a length X of a light guide area () is set so that an area, on a boundary surface between a light-emitting area () and the light guide area (), of a cross-section of a light beam that is emitted from the at least one point light source () and is diffused in the light guide plate () is equal to or larger than an area of the boundary surface (interface). Moreover, a length X, in a length direction D, of the light guide area is smaller than a length Y, in the length direction D, of the light-emitting area.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile