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. 07, 2020
Filed:
Sep. 20, 2016
Citizen Electronics Co., Ltd., Fujiyoshida-shi, Yamanashi, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Masahiko Hamada, Fujiyoshida, JP;
Hirohiko Ishii, Fujiyoshida, JP;
Citizen Electronics Co., Ltd., Yamanashi, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
A light-emitting device is provided whose color mixing property and light emission efficiency are improved, while white light with high color rendering performance is ensured by means of four kinds of LED elements emitting red, green, blue, and white light respectively. The light-emitting device includes a phosphor layer containing a phosphor, a first LED element to emit white light in combination with fluorescence generated by excitation of the phosphor, a second LED element to emit red light, a third LED element to emit green light, a fourth LED element to emit blue light placed more distant from the phosphor layer compared to the second and third LED elements, a substrate with the first to fourth LED elements mounted on a common mounting surface, a resin frame surrounding at least a part of an outer circumference of the substrate, a sealing resin injected inside the resin frame and on the substrate to encapsulate the first to fourth LED elements, and a light-shielding component placed on an upper surface of the sealing resin to cover at least the first LED element.