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

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:
OSTI Identifier:
1470732
Assignee:
EIE Materials, Inc. (Lexington, KY) DOEEE
Patent Number(s):
10,056,530
Application Number:
15/679,021
Contract Number:
EE0007622
Resource Relation:
Patent File Date: 2017 Aug 16
Research Org:
EIE Materials, Inc., Lexington, KY (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE