| 摘要 |
A light emitting device includes a light emitting structure including a first conductive type semiconductor layer, a second conductive type semiconductor layer, and an active layer between the first conductive type semiconductor layer and the second conductive type semiconductor layer, and a light extraction structure that extracts light from the light emitting structure. The light extraction structure includes at least a first light extraction zone and a second light extraction zone, where a period and/or size of first concave and/or convex structures of the first light extraction zone is different from a period and/or size of second concave and/or convex structures of the second light extraction zone. |
