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US07884382B2 Rules for efficient light sources using phosphor converted LEDs 有权
使用磷光体转换LED的高效光源规则

Rules for efficient light sources using phosphor converted LEDs
Abstract:
An LED lamp including an LED and one or more phosphors, wherein for each phosphor, a figure of merit (FOM) defined as the product of (incident LED flux)×(excitation cross-section of the phosphor)×(phosphor material decay time) is less than 0.3. 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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