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:
Jul. 21, 2020
Filed:
Feb. 28, 2018
Enplas Corporation, Saitama, JP;
Kensuke Hiraka, Saitama, JP;
ENPLAS CORPORATION, Saitama, JP;
Abstract
A planar light source device having a plurality of light emission devices and a light diffusion plate. For each of the light emission devices, the light beam from among light beams satisfying θ3/θ1<1 that has the smallest emission angle θ1xmin satisfies the relationship Ax<Px, where Ax is the distance from the center axis of the point on the light diffusion plate that is reached by the light beam emitted at the emission angle θ1xmin, which is greater than Px/2. The light beam from among light beams satisfying θ3/θ1<1 that has the smallest emission angle θ1ymin satisfies the relationship Ay<Py, where Ay is the distance from the center axis of the point on the light diffusion plate that is reached by the light beam emitted at the emission angle θ1ymin, which is greater than Py/2.