Backlight module

Abstract

A backlight module includes a first light guide plate, a second light guide plate, a back plate, a first light source, a second light source, and a heat pipe module. The second light guide plate is disposed opposite to the first light guide plate. The back plate has a plate portion and multiple wall portions. The plate portion is located on the side of the first light guide plate opposite to the second light guide plate, and the wall portions stand on the plate portion and surround the first and second light guide plates. The first light source is fixed to one of the wall portions and is adapted to emit a light beam toward the first light guide plate. The second light source is fixed to one of the wall portions and is adapted to emit a light beam toward the second light guide plate. The heat pipe module is fixed to the back plate.

Claims

1. A backlight module, comprising: First light guide plate; A second light guide plate is disposed opposite to the first light guide plate; A backplate having a plate portion and a plurality of wall portions, the plate portion being located on the side of the first light guide plate opposite to the second light guide plate, the wall portions being erected on the plate portion and surrounding the first light guide plate and the second light guide plate; a first light source fixed to one of the wall portions and adapted to emit a light beam toward the first light guide plate; a second light source fixed to one of the wall portions and adapted to emit a light beam toward the second light guide plate; and a heat pipe module fixed to the backplate.

2. The backlight module as described in claim 1, wherein the wall portions include a first wall portion and a second wall portion, the first wall portion being adjacent to the second wall portion, the first light source being fixed to the first wall portion and including a plurality of first light-emitting elements arranged along a first direction, the second light source being fixed to the second wall portion and including a plurality of second light-emitting elements arranged along a second direction, the second direction being different from the first direction; the heat pipe module includes a first heat pipe and a second heat pipe, the first heat pipe having a first heat-absorbing section and a first heat-conducting section, the first heat-absorbing section being fixed to the side of the plate portion near the second wall portion and extending along the second direction, the first heat-conducting section being connected to the first heat-absorbing section and extending along the first direction; the second heat pipe having a second heat-absorbing section and a second heat-conducting section, the second heat-absorbing section being fixed to the side of the plate portion near the second wall portion and extending along the second direction, the second heat-conducting section being connected to the second heat-absorbing section and extending along the first direction.

3. The backlight module as described in claim 2, wherein the first heat-absorbing segment has a first heat-absorbing end and a first heat-conducting end opposite to each other, the first heat-absorbing end being close to a connection between the first wall portion and the second wall portion, and the first heat-conducting segment being connected to the first heat-conducting end; the second heat-absorbing segment has a second heat-absorbing end and a second heat-conducting end opposite to each other, the second heat-absorbing end being close to the first heat-conducting end, and the second heat-conducting segment being connected to the second heat-conducting end.

4. The backlight module as described in claim 1, wherein the wall portions include a first wall portion and a second wall portion opposite to each other, the first light source is fixed to the first wall portion and includes a plurality of first light-emitting elements arranged along a first direction, the second light source is fixed to the second wall portion and includes a plurality of second light-emitting elements arranged along the first direction; the heat pipe module includes a first heat pipe and a second heat pipe, the first heat pipe having two first heat-absorbing sections and a first heat-conducting section, the first heat-conducting section extending from the side of the plate portion near the first wall portion to the side of the plate portion near the second wall portion, the two first heat-absorbing sections connecting opposite ends of the first heat-conducting section and extending respectively along the first direction; the second heat pipe having two second heat-absorbing sections and a second heat-conducting section, the second heat-conducting section extending from the side of the plate portion near the first wall portion to the side of the plate portion near the second wall portion, the two second heat-absorbing sections connecting opposite ends of the second heat-conducting section and extending respectively along a direction opposite to the first direction.

5. The backlight module as claimed in claim 1, wherein the walls include a first wall and a second wall opposite to each other, the first light source and the second light source are fixed to the first wall, the first light source includes a plurality of first light-emitting elements arranged along a first direction, and the second light source includes a plurality of second light-emitting elements arranged along the first direction; the heat pipe module includes a first heat pipe having a first heat-absorbing section and a first heat-conducting section, the first heat-absorbing section being fixed to the side of the back plate near the first wall and extending along the first direction, the first heat-conducting section connecting to the first heat-absorbing section and bending relative to the first heat-absorbing section, and the first heat-conducting section extending toward the second wall.

6. The backlight module as claimed in claim 1, wherein one of the wall portions has a top surface facing away from the panel portion, and the top surface has a light source slot, wherein the first light source or the second light source is fixed in the light source slot.

7. The backlight module as claimed in claim 1, wherein the first light source includes a plurality of first light-emitting elements and a first substrate, the first substrate having a first side, a second side and a first thermally conductive through-hole, the first side being fixed to one of the wall portions and the first light-emitting elements being fixed to the second side, the first thermally conductive through-hole extending from the first side to the second side.

8. The backlight module as claimed in claim 7, wherein the first substrate includes a first thermally conductive layer disposed within the first thermally conductive through-hole and extending to the first side and the second side.

9. The backlight module as claimed in claim 1, wherein the second light source includes a plurality of second light-emitting elements and a second substrate, the second substrate having a third side, a fourth side and a second thermally conductive through-hole, the third side being fixed to one of the wall portions and the second light-emitting elements being fixed to the fourth side, the second thermally conductive through-hole extending from the third side to the fourth side.

10. The backlight module as claimed in claim 9, wherein the second substrate includes a second thermally conductive layer disposed within the second thermally conductive through-hole and extending to the third side and the fourth side.

11. The backlight module as claimed in claim 1, wherein the plate portion has a first surface and a second surface, the first surface and the second surface being opposite each other and the first surface facing the first light guide plate, and the heat pipe module being fixed to the first surface or the second surface.

12. The backlight module as claimed in claim 11, wherein the heat pipe module is fixed in a groove on the second surface.

13. The backlight module as claimed in claim 11, wherein the heat pipe module is fixed to the second surface, and the second surface has a plurality of heat dissipation structures.

14. The backlight module as claimed in claim 11, wherein the heat pipe module is fixed in a receiving groove on the first surface, and in a normal direction of the first surface, a depth of the receiving groove is greater than a thickness of the heat pipe module.

15. The backlight module as claimed in claim 11, wherein each of the wall portions has an outer side facing away from the first light guide plate and the second light guide plate, and the heat pipe module is fixed to the second surface and extends to one of the outer sides.

16. The backlight module as claimed in claim 15, wherein one of the outer surfaces has a recess, and a portion of the heat pipe module is located within the recess.

Images