LED based omni-directional light engine

1. An LED based omni-directional light engine, comprising:

a toroidal lens coupled to a controller circuit board, said toroidal lens having a flat base surface, an outer surface, and an inner surface coated with a layer of reflection materials;

at least two LEDs mounted to said controller circuit board;

wherein said inner surface's upper edge is merged with said outer surface and said inner surface's lower edge is merged with said flat base surface, and a hollow space is substantially defined by said inner surface;

wherein said controller circuit board is electrically coupled to a power source;

wherein a distance between any two adjacent ones of said LEDs is substantially same;

wherein said LEDs are located immediately under said flat base surface; and

wherein said inner surface substantially reflects light beams emitted from said LEDs to said outer surface which refracts said beams to omni-directions.

2. The light engine of claim 1 , wherein said inner surface or said outer surface is any of:

a surface formed by revolving a segment of spherical profile;

a surface formed by revolving a segment of parabola;

a surface formed by revolving a segment of oval; and

a surface formed by revolving a segment of aspherical profile; and

wherein said inner surface and said outer surface have different curvatures.

3. The light engine of claim 2 , wherein said revolving is made along an enclosed polygon path.

4. The light engine of claim 1 , wherein a space between said flat base surface and each of said LEDs is filled with optical impedance matching gel.

5. The light engine of claim 1 , further comprising at least one sensor mounted to said controller circuit board, said sensor being any of:

thermo sensor;

light sensor; and

voltage sensor.

6. The light engine of claim 1 , wherein said controller circuit board comprises at least one heat sink.

7. The light engine of claim 1 , wherein each of said LEDs' position relative to said toroidal lens is adjustable.

8. The light engine of claim 1 , wherein said LEDs are in different colors following any pattern.

9. An LED based omni-directional light engine, comprising:

a toroidal lens coupled to a controller circuit board, said toroidal lens having a flat base surface, an outer surface, and an inner surface coated with a layer of reflection materials;

at least two LEDs mounted to said controller circuit board;

wherein said controller circuit board is electrically coupled to a power source;

wherein a distance between any two adjacent ones of said LEDs is substantially same;

wherein said LEDs are located immediately under said flat base surface;

wherein said inner surface substantially reflects light beams emitted from said LEDs to said outer surface; and

wherein said toroidal lens is compartmentalized into two or more segments, each of which having two cross sectional sides which are coated with reflection materials.

10. The light engine of claim 9 , wherein each of said segments is mechanically modular.

11. An LED based omni-directional light engine, comprising at least two modular light source units which are vertically coupled together and are sealed in a transparent cover, wherein each of said light source units comprises:

a toroidal lens coupled to a controller circuit board, said toroidal lens having a flat base surface, an outer surface, and an inner surface coated with a layer of reflection materials;

at least two LEDs mounted to said controller circuit board;

wherein said inner surface's upper edge is merged with said outer surface and said inner surface's lower edge is merged with said flat base surface, and a hollow space is substantially defined by said inner surface;

wherein said controller circuit board is electrically coupled to a power source;

wherein a distance between any two adjacent ones of said LEDs is substantially same;

wherein said LEDs are located immediately under said flat base surface; and

wherein said inner surface substantially reflects light beams emitted from said LEDs to said outer surface which refracts said beams to omni-directions.

12. The light engine of claim 11 , wherein said inner surface or said outer surface is any of:

a surface formed by revolving a segment of spherical profile;

a surface formed by revolving a segment of parabola;

a surface formed by revolving a segment of oval; and

a surface formed by revolving a segment of aspherical profile; and

wherein said inner surface and said outer surface have different curvatures.

13. The light engine of claim 12 , wherein said revolving is made along an enclosed polygon path.

14. The light engine of claim 11 , wherein a space between said flat base surface and each of said LEDs is filled with optical impedance matching gel.

15. The light engine of claim 11 , further comprising at least one sensor mounted to said controller circuit board, said sensor being any of:

thermo sensor;

light sensor; and

voltage sensor.

16. The light engine of claim 11 , wherein said controller circuit board comprises at least one heat sink.

17. The light engine of claim 11 , wherein each of said LEDs' position relative to said toroidal lens is adjustable.

18. The light engine of claim 11 , wherein said LEDs are in different colors following any pattern.

19. An LED based omni-directional light engine, comprising at least two modular light source units which are vertically coupled together and are sealed in a transparent cover, wherein each of said light source units comprises:

a toroidal lens coupled to a controller circuit board, said toroidal lens having a flat base surface, an outer surface, and an inner surface coated with a layer of reflection materials;

at least two LEDs mounted to said controller circuit board;

wherein said controller circuit board is electrically coupled to a power source;

wherein a distance between any two adjacent ones of said LEDs is substantially same;

wherein said LEDs are located immediately under said flat base surface;

wherein said inner surface substantially reflects light beams emitted from said LEDs to said outer surface; and

wherein said toroidal lens is compartmentalized into two or more segments, each of which having two cross sectional sides which are coated with reflection materials.

20. The light engine of claim 19 , wherein each of said segments is mechanically modular.