| 摘要 |
<p>Disclosed are a light emitting diode, a light emitting diode package, and a lighting system. The light emitting diode (100) includes a light emitting structure (145) including a first conductive semiconductor layer (130), an active layer (140), and a second conductive semiconductor layer (150) on, a light transmissive substrate (110) having a refractive index lower than a refractive index of the first conductive semiconductor layer, and a mirror structure layer (120) having a structure in which a first mirror layer (121) having a first refractive index (111) and a second mirror layer (122) having a second refractive index (n2) different from the first refractive index are alternately stacked on each other. The first mirror layer has a thickness of W·λ/(4·n1·m), and the second mirror layer has a thickness of W·λ/(4·n2·m) in which W represents a weight constant in a range of about 1.05 to about 1.25, and m represents a natural number.
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