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Title: Phosphor-converted white light emitting diodes having narrow-band green phosphors

Abstract

In one aspect, a phosphor converted white light LED comprising a narrow green phosphor rather than a conventional broad green phosphor may simultaneously exhibit high R9, and high Luminance Efficacy of Radiation, optionally without use of a deep red phosphor to maintain desired red color rendering. In another aspect, a phosphor converted white light LED comprising a narrow green phosphor rather than a conventional broad green phosphor may provide an emission spectrum exhibiting a significant dip in the yellow region of the spectrum and thereby provide high red-green contrast without use of a filter. The yellow dip may be shallower than in conventional devices, and the device may therefore be brighter, while maintaining desired CRI and R9.

Inventors:
; ; ; ;
Issue Date:
Research Org.:
EIE Materials, Inc., Lexington, KY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1470732
Patent Number(s):
10056530
Application Number:
15/679,021
Assignee:
EIE Materials, Inc. (Lexington, KY)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
DOE Contract Number:  
EE0007622
Resource Type:
Patent
Resource Relation:
Patent File Date: 2017 Aug 16
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Melman, Jonathan, Nordsell, Robert, Baroudi, Kristen, Thomas, Evan, and Go, Yong Bok. Phosphor-converted white light emitting diodes having narrow-band green phosphors. United States: N. p., 2018. Web.
Melman, Jonathan, Nordsell, Robert, Baroudi, Kristen, Thomas, Evan, & Go, Yong Bok. Phosphor-converted white light emitting diodes having narrow-band green phosphors. United States.
Melman, Jonathan, Nordsell, Robert, Baroudi, Kristen, Thomas, Evan, and Go, Yong Bok. Tue . "Phosphor-converted white light emitting diodes having narrow-band green phosphors". United States. https://www.osti.gov/servlets/purl/1470732.
@article{osti_1470732,
title = {Phosphor-converted white light emitting diodes having narrow-band green phosphors},
author = {Melman, Jonathan and Nordsell, Robert and Baroudi, Kristen and Thomas, Evan and Go, Yong Bok},
abstractNote = {In one aspect, a phosphor converted white light LED comprising a narrow green phosphor rather than a conventional broad green phosphor may simultaneously exhibit high R9, and high Luminance Efficacy of Radiation, optionally without use of a deep red phosphor to maintain desired red color rendering. In another aspect, a phosphor converted white light LED comprising a narrow green phosphor rather than a conventional broad green phosphor may provide an emission spectrum exhibiting a significant dip in the yellow region of the spectrum and thereby provide high red-green contrast without use of a filter. The yellow dip may be shallower than in conventional devices, and the device may therefore be brighter, while maintaining desired CRI and R9.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {8}
}

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Works referenced in this record:

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Investigations of the MSAl2S3 systems () and luminescence properties of europium-doped thioaluminates
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Luminescence properties of stoichiometric EuM2S4 (M = Ga, Al) conversion phosphors for white LED applications
journal, August 2012


Robust and Stable Narrow-Band Green Emitter: An Option for Advanced Wide-Color-Gamut Backlight Display
journal, October 2016