White light generating unit, backlight assembly having the same and liquid crystal display device having the same

1. A white light generating unit comprising:

a light emitting diode (LED) structure generating a light; and

a lens structure having a fluorescent member that generates a white light after receiving the light from the LED structure, the lens structure being separably assembled with the LED structure.

2. The white light generating unit of claim 1 , wherein the LED structure comprises a blue LED.

3. The white light generating unit of claim 2 , wherein the fluorescent member comprises a yellow fluorescent material.

4. The white light generating unit of claim 2 , wherein the fluorescent member comprises a red fluorescent material and a green fluorescent material.

5. The white light generating unit of claim 1 , wherein the LED structure comprises an ultraviolet (UV) LED.

6. The white light generating unit of claim 5 , wherein the fluorescent member comprises a red fluorescent material, a green fluorescent material and a blue fluorescent material.

7. The white light generating unit of claim 1 , wherein the lens structure comprises a convex lens.

8. The white light generating unit of claim 1 , wherein the lens structure comprises a concave lens.

9. The white light generating unit of claim 1 , wherein the lens structure comprises a diffusing agent that diffuses the light generated from the LED structure.

10. The white light generating unit of claim 9 , wherein the diffusing agent is in the form of a powder.

11. The white light generating unit of claim 10 , wherein the diffusing agent includes at least one of stone powder and an acryl resin.

12. The white light generating unit of claim 1 , wherein the fluorescent member is in the form of a powder.

13. The white light generating unit of claim 12 , wherein the lens structure comprises a curing agent that hardens the fluorescent member.

14. The white light generating unit of claim 1 , further comprising a reflective band disposed on at least one face of the lens structure to reflect a light deviated from the lens structure back to the lens structure.

15. A backlight assembly, comprising:

a light generating unit including an LED structure having at least one LED that generates a light;

a light guiding plate that guides the light emitted from the light generating unit and emits the light;

a lens structure having at least one lens disposed between the light generating unit and the light guiding plate, and the lens structure having a fluorescent member that receives the light from the light generating unit to emit a white light and being separably assembled with the LED structure; and

a receiving container that receives the light generating unit, the light guiding plate, and the lens structure.

16. The backlight assembly of claim 15 , wherein the LED structure comprises a blue LED and the fluorescent member comprises a yellow fluorescent material.

17. The backlight assembly of claim 15 , wherein the LED structure comprises a blue LED and the fluorescent member comprises a red fluorescent material and a green fluorescent material.

18. The backlight assembly of claim 15 , wherein the LED structure comprises a UV LED and the fluorescent member comprises a red fluorescent material, a green fluorescent material and a blue fluorescent material.

19. The backlight assembly of claim 15 , wherein the lens structure comprises one of a convex lens and a concave lens.

20. The backlight assembly of claim 15 , further comprising a reflective band disposed on at least one face of the lens structure to reflect a light deviated from the lens structure back into the lens structure.

21. The backlight assembly of claim 15 , wherein the lens structure comprises a diffusing agent that diffuses the light provided from the light generating unit.

22. The backlight assembly of claim 21 , wherein the lens structure further comprises a curing agent that hardens the diffusing agent.

23. The backlight assembly of claim 15 , further comprising a receiving groove formed on a side portion of the light guide plate to receive the lens structure.

24. The backlight assembly of claim 23 , wherein the receiving groove has a shape corresponding to that of the lens structure.

25. The backlight assembly of claim 24 , wherein the lens structure makes contact with the receiving groove.

26. The backlight assembly of claim 23 , wherein the lens structure is spaced apart from the receiving groove.

27. A liquid crystal display (LCD) device, comprising:

a backlight assembly comprising:

a light generating unit including an LED structure having at least one LED that generates a light;

a light guiding plate that guides the light emitted from the light generating unit and emits the light;

a lens structure having at least one lens disposed between the light generating unit and the light guiding plate and the lens structure having a fluorescent member that receives the light from the light generating unit to emit a white light and being separably assembled with the LED structure; and

a receiving container that receives the light generating unit, the light guiding plate, and the lens structure; and

an LCD panel that receives the light to display an image.

28. The LCD device of claim 27 , wherein the LED structure comprises a blue LED, and the fluorescent member comprises a yellow fluorescent material.

29. The LCD device of claim 27 , wherein the LED structure comprises a blue LED, and the fluorescent member comprises a red fluorescent material and a green fluorescent material.

30. The LCD device of claim 27 , wherein the LED structure comprises a UV LED, and the fluorescent member comprises a red fluorescent material, a green fluorescent material and a blue fluorescent material.

31. The LCD device of claim 27 , wherein the lens structure comprises one of a convex lens and a concave lens.