Light emitting device

1. A light emitting device, comprising:

a base comprising:

a first side slot;

a second side slot; and

a central slot separated from the first side slot and the second side slot, wherein the first side slot is formed in a separated recess configuration with a long axis and a short axis shorter than the long axis;

a first light emitting unit, installed in the central slot;

a second light emitting unit installed in first side slot;

a light conversion layer, covered onto the first light emitting unit or the second light emitting unit; and

a lens, comprising a curved surface which continuously covers the light conversion layer, the central slot, the first side slot, and the second side slot,

wherein the first slot and the lens have first similar contour lines when seen in a top view.

2. The light emitting device of claim 1 , wherein the central slot and the lens have second similar contour lines.

3. The light emitting device of claim 2 , wherein the first similar contour lines are disconnected to the second similar contour lines.

4. The light emitting device of claim 1 , wherein the first similar contour lines comprise a section with curved shape.

5. The light emitting device of claim 1 , wherein the second side slot and the lens have third similar contour lines.

6. The light emitting device of claim 1 , further comprising an electric connecting pad arranged at the base and separated from the first light emitting unit.

7. The light emitting device of claim 6 , further comprising an inner-layer circuit separated from the electric connecting pad and electrically connected to the electric connecting pad and the first light emitting unit.

8. The light emitting device of claim 7 , further comprising a first conductive hole connected to the inner-layer circuit and the first light emitting unit.

9. The light emitting device of claim 7 , further comprising a second conductive hole connected to the inner-layer circuit and the electric connecting pad.

10. The light emitting device of claim 9 , wherein the second conductive hole is extended to the electric connecting pad from the inner-layer circuit in the base.

11. The light emitting device of claim 7 , wherein the first light emitting unit and the second light emitting unit are electrically coupled to each other through the inner-layer circuit.

12. The light emitting device of claim 1 , further comprising two first conductive holes separated by a first distance, and two second conductive holes separated by a second distance, wherein the second distance is greater than the first distance.

13. The light emitting device of claim 1 , wherein the light emitting device is configured to emit light having a color temperature from 2700K to 4000K.

14. The light emitting device of claim 1 , wherein the central slot, the first side slot, and the second side slot collectively have an area greater than 50% of that of the base in a top view.

15. The light emitting device of claim 1 , wherein the central slot has a shorter side, and a longer side by which the first side slot is arranged.

16. The light emitting device of claim 1 , wherein the first light emitting unit is greater than the second light emitting unit in size.

17. The light emitting device of claim 1 , wherein the first side slot has a straight edge near the central slot, and a curved edge distant from the straight edge.

18. The light emitting device of claim 1 , further comprising a third side slot and a forth side slot, wherein the central slot are surrounded by the first, second, third, and forth side slots from different sides.

19. The light emitting device of claim 1 , wherein the central slot is arranged between the first side slot and the second side slot.

20. The light emitting device of claim 1 , further comprising a third light emitting unit installed in the central slot, wherein the first light emitting unit and the third light emitting unit are configured to emit a same color light.