Journal
JOURNAL OF APPLIED PHYSICS
Volume 119, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4941396
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Funding
- College of Architecture and Urban Planning, Tongji University, Shanghai, China
- Shanghai High Peak and Plateau Program
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Spectral optimization simulation of white light is studied to boost maximum attainable luminous efficacy of radiation at high color-rendering index (CRI) and various color temperatures. The photopic eye-sensitivity curve V(lambda) is utilized as the dominant portion of white light spectra. Emission spectra of a blue InGaN light-emitting diode (LED) and a red AlInGaP LED are added to the spectrum of V(lambda) to match white color coordinates. It is demonstrated that at the condition of color temperature from 2500 K to 6500 K and CRI above 90, such white sources can achieve spectral efficacy of 330-390 lm/W, which is higher than the previously reported theoretical maximum values. We show that this eye-sensitivity-based approach also has advantages on component energy conversion efficiency compared with previously reported optimization solutions. (C) 2016 AIP Publishing LLC.
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