White LED lighting device, and optical lens
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United States of America Patent
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Mar 17, 2015
Grant Date -
Nov 15, 2012
app pub date -
Jan 4, 2011
filing date -
Jan 19, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed are a white LED lighting device and an optical lens used in it. The white LED lighting device comprises a white LED and an optical lens. The white LED includes: a LED chip which emits blue light; and a fluorescent material which is excited by emission light of the LED chip and converts a wavelength into fluorescence of a complementary color of blue. The optical lens is formed with a scattering light guide which is given uniform scattering power in terms of a volume. The scattering light guide includes scattering particles for the scattering efficiency in a short wavelength range of light to be higher than that in a long wavelength range of light.
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