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:
May. 11, 2021
Filed:
Mar. 26, 2020
Nichia Corporation, Anan, JP;
NICHIA CORPORATION, Anan, JP;
Abstract
A light emitting device has a covering member. The covering member includes light reflecting material and a second fluorescent material, and a dominant wavelength of an emission spectrum of the second fluorescent material differs from a dominant wavelength of an emission spectrum of the light emitting device by 30 nm or less. The light emitting device emits light with chromaticity that is within a four-sided region on a CIE 1931 chromaticity diagram, where chromaticity coordinates (x, y) are (0.645, 0.335) at a first point, (0.665, 0.335) at a second point, (0.735, 0.265) at a third point, (0.721, 0.259) at a fourth point, and a first line joins the first and second points, a second line joins the second and third points, a third line joins the third and fourth points, and a fourth line joins the fourth and first points to define the four-sided region of the chromaticity diagram.