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

Melman, Jonathan; Nordsell, Robert; Baroudi, Kristen; Thomas, Evan; Go, Yong Bok

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

Patent · Tue Aug 21 00:00:00 EDT 2018

OSTI ID:1470732

Melman, Jonathan; Nordsell, Robert; Baroudi, Kristen; Thomas, Evan; Go, Yong Bok

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.

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Research Organization:: EIE Materials, Inc., Lexington, KY (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: EE0007622

Assignee:: EIE Materials, Inc. (Lexington, KY)

Patent Number(s):: 10,056,530

Application Number:: 15/679,021

OSTI ID:: 1470732

Resource Relation:: Patent File Date: 2017 Aug 16

Country of Publication:: United States

Language:: English

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