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:
Mar. 02, 2020
Filed:
May. 22, 2016
Enplas Corporation, Kawaguchi-shi, Saitama, JP;
Masao Yamaguchi, Kitamoto, JP;
Shingo Ohkawa, Misato, JP;
Enplas Corporation, Saitama, JP;
Abstract
A display has a member irradiated by a surface light source device comprising a light diffusion member and emission device. The emission device is provided with a light flux control member having a recess and light control emission face which is configurated so as to satisfy Conditions 1 and 2 in a range at least covering a half-intensity-angular-range. Light emitting element(s) may be sealed. Condition 1 is that relation θ>1 is satisfied except for light emitted from a light emitting element toward within an angular-neighbourhood of a standard optical axis of the emission device, and Condition 2 is that value of θdecreases gradually according to increasing of θ, where θis an emission angle of any light at being emitted from the light emitting element, and θis an emission angle of that light of θat then being emitted from the light control emission face of the light flux control member.