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:
Jan. 02, 2018
Filed:
Jan. 14, 2015
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Koji Omura, Osaka, JP;
Toshiaki Kurachi, Kyoto, JP;
Abstract
A light emitting device that emits white light includes first and second light emitting elements which have different emission peak wavelengths within a range of 440 nm to 495 nm. The device also includes a wavelength conversion material which converts a wavelength of light emitted by at least one of the first and second light emitting elements. The white light has an emission spectrum peaked at a first peak wavelength and a second peak wavelength. The first peak wavelength corresponds to the emission peak wavelength of the first light emitting element, and the second peak wavelength corresponds to the emission peak wavelength of the second light emitting element. Where a light intensity at one of the first peak wavelength and the second peak wavelength is 1, a light intensity at a bottom of a valley between the first and second peak wavelengths is 0.5 or higher but lower than 1.0.