| 摘要 |
A light emitting device includes a light emitting module and a complex lens, which is disposed on the light emitting module and includes first to fourth lens portions. A first group of light beams emitted from the light emitting module and outputted from the first lens portion travels through the first lens portion with total internal reflection, a second group of light beams emitted from the light emitting module and outputted from the fourth lens portion travels through the second, third and fourth lens portions with total internal reflection, a third group of light beams emitted from the light emitting module and outputted from the fourth lens portion travels through the third and fourth lens portions with total internal reflection, and a fourth group of light beams emitted from the light emitting module is outputted from the fourth lens portion.
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