Back light module and system for liquid crystal panels

1. A back light module for a display panel, comprising:

a rear cover, the rear cover comprising a bottom plate and a side plate coupled to the bottom plate, the side plate having a first edge region, a second edge region, and an inner side surface, the first edge region being coupled to the bottom plate, the bottom plate comprising an edge region and a top surface, the edge region being joined to the first edge region of the side plate;

a light source disposed in the interior of the rear cover;

a light guide plate disposed in the interior of the rear cover and comprising an incident surface facing the light source;

a reflective film disposed overlaying the top surface of the bottom plate and the inner side surface of the side plate; and

a reflective mode frame set on the second edge region of the side plate opposite the first edge region,

wherein the interior surface of the reflective mode frame and the reflective film are configured to reflect light from the light source to the incident surface of the light guide plate.

2. The back light module according to claim 1 , wherein the rear cover is substantially a metal bearing material.

3. The back light module according to claim 1 , wherein the rear cover is made of a material selected from the group consisting of galvanized steel plate, stainless steel plate, and aluminum plate.

4. The back light module according to claim 1 , wherein the reflective film comprises a white reflective paint layer coated on the rear cover.

5. The back light module according to claim 1 , wherein the reflective film comprises a white reflective sheet.

6. The back light module according to claim 5 , wherein the bottom plate of the rear cover includes at least one positioning sheet protruding from the top surface of the bottom plate, and the reflective film is set within at least one slot corresponding to the at least one positioning sheet.

7. The back light module according to claim 6 , further comprising a light guide plate disposed on the reflective film on the bottom plate.

8. The back light module according to claim 7 , further comprising a diffusion sheet on the light guide plate, and a plurality of slots corresponding to the at least one positioning sheet provided by the diffusion sheet.

9. The back light module according to claim 7 , wherein the light guide plate comprises at least one corner, the at least one corner has a cut breach, at least one corner of the bottom plate of the rear cover corresponding to the at least corner of the light guide plate has at least one positioning sheet with a curve protruding from the top surface of the bottom plate, and the cut breach of the at least corner of the light guide plate is coupled to the at least one positioning sheet in the at least one corner of the bottom plate.

10. The back light module according to claim 9 , wherein the bottom plate of the rear cover comprises a plurality of openings, the plurality of openings comprising respective locations and sizes , each of the openings corresponding to the at least one positioning sheet of the bottom plate.

11. The back light module according to claim 10 , wherein the light source comprises a cold cathode fluorescent lamp surrounding the inner side surface of the side plate of the rear cover, wherein the cold cathode fluorescent lamp includes two electrodes, and the electrodes are located in a part of the openings.

12. The back light module according to claim 1 , wherein the inner side surface of the side plate of the rear cover comprises a plurality of positioning bumps, a plurality of positioning holes, corresponding to the positioning bumps, are set in the reflective film, and the positioning bumps are inserted into the corresponding positioning holes to maintain the reflective film to the inner side surface of the side plate of the rear cover.

13. The back light module according to claim 1 , wherein the reflective film comprises a white reflective sheet characterized by an anti-yellowing and heat-resistant properties.

14. The back light module according to claim 1 , wherein the light source includes at least one L-shaped cold cathode fluorescent lamp surrounding the inner side surface of the side plate of the rear cover.

15. The back light module according to claim 1 , wherein the rear cover comprises a lower surface, the lower surface comprising a plurality of bosses, and surfaces of the bosses joined with the rear cover are coated with white reflective films.

16. The back light module according to claim 15 , wherein the bosses, the rear cover and a plurality of outer devices are screwed altogether, and the outer devices comprises an AD board, an inverter and a hinge.

17. A liquid crystal display device, comprising:

a back light module, comprising:

a rear cover, the rear cover comprising a bottom plate and a side plate coupled to the bottom plate, the side plate having a first edge region, a second edge region, and an inner side surface, the first edge region being coupled to the bottom plate, the bottom plate comprising an edge region and a top surface, the edge region being joined to the first edge region of the side plate;

a light source disposed in the interior of the rear cover;

a light guide plate disposed in the interior of the rear cover and comprising an incident surface facing the light source;

a reflective film disposed overlaying the top surface of the bottom plate and the inner side surface of the side plate; and

a reflective mode frame set on the second edge region of the side plate opposite the first edge region,

wherein the interior surface of the reflective mode frame and the reflective film are configured to reflect light from the light source to the incident surface of the light guide plate;

a panel coupled to the back light module; and

a frame coupled to the panel, the frame being associated with the back light module to maintain the panel between the frame and the back light module.

18. The liquid crystal display device according to claim 17 , wherein a material of the reflective film is a white reflective paint layer coated on the rear cover.

19. The liquid crystal display device according to claim 17 , wherein a material of the reflective film is a white reflective sheet.

20. A method for assembling a liquid crystal display device, comprising:

providing a back light module, comprising:

a rear cover, the rear cover comprising a bottom plate and a side plate coupled to the bottom plate, the side plate having a first edge region, a second edge region, and an inner side surface, the first edge region being coupled to the bottom plate, the bottom plate comprising an edge region and a top surface, the edge region being joined to the first edge region of the side plate;

a light source disposed in the interior of the rear cover;

a light guide plate disposed in the interior of the rear cover and comprising an incident surface facing the light source;

a reflective film disposed overlaying the top surface of the bottom plate and the inner side surface of the side plate; and

a reflective mode frame set on the second edge region of the side plate opposite the first edge region,

wherein the interior surface of the reflective mode frame and the reflective film are configured to reflect light from the light source to the incident surface of the light guide plate;

coupling a panel to the back light module; and

coupling a frame to the panel, the frame being associated with the back light module to maintain the panel between the frame and the back light module.

21. The back light module for a display panel of claim 1 , wherein the reflective mode frame comprises polycarbonate.

22. The back light module for a display panel of claim 1 , wherein the reflective mode frame further comprises a plurality of fillisters on a top surface of the reflective mode frame.

23. A back light module for a display panel, comprising:

a rear cover, the rear cover comprising a bottom plate and a side plate coupled to the bottom plate, the side plate having a first edge region, a second edge region, and an inner side surface, the first edge region being coupled to the bottom plate, the bottom plate comprising an edge region and a top surface, the edge region being joined to the first edge region of the side plate;

a reflective film disposed overlaying the top surface of the bottom plate and the inner side surface of the side plate;

a lamp disposed between the first edge region and the second edge region of the side plate;

a light guide plate disposed in the interior of the rear cover and comprising an incident surface facing the lamp;

one or more connecting lines coupled to the lamp; and

a reflective mode frame set on the second edge region of the side plate opposite the first edge region, a top surface of the reflecting mode frame including at least an opening through which at least one of the one or more connecting lines is disposed,

wherein the interior surface of the reflective mode frame and the reflective film are configured to reflect light from the light source to the incident surface of the light guide plate.