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.
- 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
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