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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.:

US 11118757 B1

PDFFull Text
Date of Patent:
Sep. 14, 2021

Filed:

Nov. 26, 2019

Light emitting device

Applicant:

Nichia Corporation, Anan, JP;

Inventors:

Motokazu Yamada, Tokushima, JP;

Takeshi Tamura, Tokushima, JP;

Hiroshi Fujimori, Chino, JP;

Assignee:

NICHIA CORPORATION, Anan, JP;

Attorney:

Foley & Lardner LLP

Primary Examiner:

Andrew J Coughlin

Int. Cl.
CPC ...
G02F 1/13357 (2006.01); F21V 7/22 (2018.01); F21V 9/30 (2018.01); F21V 7/00 (2006.01); F21V 13/08 (2006.01); G02F 1/1335 (2006.01); F21Y 115/30 (2016.01); F21Y 105/16 (2016.01); F21Y 115/10 (2016.01);
U.S. Cl.
CPC ...
F21V 7/22 (2013.01); F21V 7/0083 (2013.01); F21V 9/30 (2018.02); F21V 13/08 (2013.01); G02F 1/133603 (2013.01); G02F 1/133605 (2013.01); G02F 1/133606 (2013.01); G02F 1/133611 (2013.01); F21Y 2105/16 (2016.08); F21Y 2115/10 (2016.08); F21Y 2115/30 (2016.08); G02F 1/133557 (2021.01); G02F 1/133614 (2021.01);
Abstract

A light emitting device includes: a mounting board; a plurality of light sources positioned on the mounting board; a light diffusion plate; a half mirror positioned between the light diffusion plate and the plurality of light sources; and a plurality of diffuse reflectors positioned between the mounting board and the light diffusion plate, and above at least part of each emission face of the plurality of light sources. The diffuse reflectors comprise a resin, and particles dispersed in the resin. Each of the diffuse reflectors is positioned in an area that, in the top view, is larger than and includes the emission face of each light source. A density of the particles in said area, in the top view, is higher in a first portion located immediately above the emission face of each light source than in a second portion located around a periphery of the first portion.

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