发明申请
US20050227388A1 LED illumination device with layered phosphor pattern 有权
具有层状磷光体图案的LED照明装置

LED illumination device with layered phosphor pattern
摘要:
A method of applying at least two phosphors to an LED, wherein a first phosphor material having a lower absorption, shorter luminescence decay time, and/or lower thermal quenching than a second phosphor material is positioned closer to the LED than the second phosphor. Such an arrangement provides a light emitting device with improved lumen output and color stability over a range of drive currents.
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