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:
Sep. 24, 2024
Filed:
Apr. 21, 2020
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Abstract
A light emitting device includes a light source that emits a primary light having a light energy density exceeding 0.5W/mm, and a first phosphor that absorbs the primary light to convert the primary light into a first wavelength-converted light having a wavelength longer than that of the primary light. The first phosphor includes a compound serving as a host, the compound being a simple oxide including one kind of metal element or a composite oxide including a plurality of different kinds of the simple oxide as an end member. When an energy conversion value at a peak wavelength of the primary light is Eelectron volts and an energy conversion value at a fluorescence peak wavelength of the first wavelength-converted light is Eelectron volts, a bandgap energy of a crystal of the simple oxide is larger than a sum of the Eelectron volts and the Eelectron volts.