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. 10, 2014
Filed:
Feb. 06, 2009
Jun Sasaki, Tokyo, JP;
Yasuyuki Kudo, Tokyo, JP;
Makoto Aoki, Tokyo, JP;
Yosihide Nagata, Tokyo, JP;
Mariko Fukuda, Tokyo, JP;
Masahiro Ochiai, Tokyo, JP;
Jun Sasaki, Tokyo, JP;
Yasuyuki Kudo, Tokyo, JP;
Makoto Aoki, Tokyo, JP;
Yosihide Nagata, Tokyo, JP;
Mariko Fukuda, Tokyo, JP;
Masahiro Ochiai, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A light guide plate includes a light-emitting surface, a light-reflecting surface opposed to the light-emitting surface, and a light-incident surface including a protrusion formed continuously along an edge portion of the light-emitting surface. Accordingly, light that has entered the protrusion is transmitted through the protrusion and totally reflected on an inner surface of the light-emitting surface to thus propagate inside the light guide plate. As described above, since incident light components emitted toward an upper portion of the light-incident surface can be effectively blocked by the protrusion, luminance distribution characteristics as well as a light use efficiency can be improved. The light guide plate is produced by a punching press process.