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:
Apr. 21, 2020
Filed:
May. 30, 2016
Citizen Electronics Co., Ltd., Fujiyoshida-shi, Yamanashi, JP;
Citizen Watch Co., Ltd., Nishitokyo-shi, Tokyo, JP;
Sadato Imai, Fujiyoshida, JP;
Masahide Watanabe, Fujiyoshida, JP;
Hirohiko Ishii, Fujiyoshida, JP;
Koki Hirasawa, Fujiyoshida, JP;
CITIZEN ELECTRONICS CO., LTD., Fujiyoshida-Shi, Yamanshi, JP;
CITIZEN WATCH CO., LTD., Nishitokyo-Shi, Tokyo, JP;
Abstract
A light-emitting device and a manufacturing method thereof are provided, which device yields light exhibiting an actual hue with a deviation reduced as much as possible from a designed hue value, wherein the light is a mixture of light emitted from densely-mounted light-emitting elements and excited light from a phosphor contained in a resin sealing the light-emitting elements. The light-emitting device includes a board, light-emitting elements mounted densely on the board so that light-emitting surfaces thereof face opposite to the board, and a seal resin containing a plurality of different phosphors and covering all of the light-emitting elements, wherein the phosphors are excited by light from the light-emitting elements and deposited on upper surfaces of the light-emitting elements. A space between adjacent light-emitting elements has a length of 5 μm or more and 120% or less of a median diameter D50 of a phosphor which has the largest average particle size of the phosphors.