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. 08, 2019
Filed:
May. 17, 2018
Eie Materials, Inc., Lexington, KY (US);
Jonathan Melman, Lexington, KY (US);
Robert Nordsell, Lexington, KY (US);
Kristen Baroudi, Lexington, KY (US);
Yong Bok Go, Lexington, KY (US);
Eric Bretschneider, Corinth, TX (US);
Alan C. Thomas, Yardley, PA (US);
Evan Thomas, Lexington, KY (US);
EIE MATERIALS, INC., Lexington, KY (US);
Abstract
Phosphors emitting green light over a narrow wavelength range may be used to broaden the gamut of display devices. In one aspect, a light emitting device comprises a light emitting solid state device emitting blue or violet light, a first phosphor that absorbs blue or violet light emitted by the light emitting solid state device and in response emits green light in a spectral band having a peak at wavelength λand a height of one half its peak on a long wavelength edge of the band at wavelength λ; and a second phosphor that absorbs blue or violet light emitted by the light emitting solid state device and in response emits red light in a spectral band having a peak at wavelength λand a height of one half its peak on a short wavelength edge of the band at wavelength λ. The ratio (λ−λ)/(λ−λ) is greater than 0.70.