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:
Sep. 11, 2018
Filed:
Apr. 19, 2016
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Kenichiro Mase, Osaka, JP;
Sadafumi Oota, Osaka, JP;
Abstract
An object of the present disclosure is to provide a surface light source lighting device capable of realizing direction control and a stable operation with respect to vibration or a great temperature change, required for use in a backlight. This surface light source lighting device causes linear light incident from a light source () to be incident to an edge surface (L) of a light guide plate () via a light incidence portion () including a light incidence lens and a louver, and can thus maintain high reliability with respect to vibration or a temperature change in a use environment. In the light guide plate (), light reflected by a first light guide pattern (A) provided on a rear surface thereof is reflected by a second light guide pattern (B) provided on the same rear surface so that an emission direction is set, and thus light is emitted from a front surface of the light guide plate () with desired distribution characteristics.