Reduced-blue-light LED lighting device, method of its manufacture, and LED lighting method
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United States of America Patent
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Nov 22, 2016
Grant Date -
Oct 2, 2014
app pub date -
Mar 29, 2014
filing date -
Mar 29, 2013
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Abstract
LED lighting device in which color-mixed light according to a mixture of a blue optical emission spectrum according to the emission from an LED element, a red optical emission spectrum according to the emission from a red phosphor, and a green optical emission spectrum according to the emission from a green phosphor is emitted, wherein in the spectrum for the emitted color-mixed light, letting the relative spectral area for the principal-wavelength peak of the blue optical emission spectrum be AB and the peak emission intensity be IB, letting the relative spectral area of the green optical emission spectrum be AG and the peak emission intensity be IG, and letting the relative spectral area of the red optical emission spectrum be AR and the peak emission intensity be IR, then IB
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