White LED lamp, backlight, light emitting device, display device and illumination device
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United States of America Patent
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Jan 5, 2021
Grant Date -
Mar 5, 2015
app pub date -
Nov 6, 2014
filing date -
Feb 25, 2008
priority date (Note) -
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Abstract
A white LED lamp including: a conductive portion; a light emitting diode chip mounted on the conductive portion, for emitting a primary light having a peak wavelength of 360 nm to 420 nm; a transparent resin layer including a first hardened transparent resin, for sealing the light emitting diode chip; and a phosphor layer covering the transparent resin layer, the phosphor layer being formed by dispersing a phosphor powder into a second hardened transparent resin, and the phosphor powder receiving the primary light and radiating a secondary light having a wavelength longer than that of the primary light. An energy of the primary light contained in the radiated secondary light is 0.4 mW/lm or less.
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