Abstract:
A backlight module and the heat-dissipating structure thereof are provided. An electrode sheath, with high thermal conductivity and electrical insulation, is arranged to hold the electrode of the lamp and to make a contact with the front bezel and the back bezel, which are made of high thermal-conductive material. Hence, the heat energy produced by the lamp will be conducted to the front band back bezels through the electrode sheath.

Description:
FIELD OF THE INVENTION 
   The present invention relates to a light source module, and more particularly relates to a backlight module and a corresponding heat-dissipating structure. 
   DESCRIPTION OF THE PRIOR ART 
   The lamp is usually used as the light source in the backlight module of the display device. However, by the need of the big sized display device, the number of the lamps used in the backlight module and the size of the lamp are in the trend of increasing, and the temperature of the backlight module is increased at the same time and it is hard to avoid. Especially, when the high temperature generated in the electrode of the lamp cannot be flowed out, the lighting efficiency and the even illumination had been affected. Therefore, there is a need for the heat-dissipating structure to flow the heat out efficiently and keep the quality of light, and especially a heat-dissipating structure can efficiently flow out the heat generated in the electrode of the lamp. 
   SUMMARY OF THE INVENTION 
   According to the background of the invention described above, the temperature is increased during the operation of the backlight module and having the problem of affecting the lighting quality. Hence, a backlight module with a heat-dissipating structure is needed to overcome the problem. The purpose is to flow the high temperature out of the electrode sheath and maintain the light quality of the backlight module, when the heat was generating in the operation of the backlight module. 
   According to the purpose described above, a backlight module with a heat-dissipating structure is provided in the present invention. An electrode sheath with the properties of dielectric and heat conduction is provided and is contacted to the external frame in the surrounding of the backlight module and the backboard in the back of the backlight module. Therefore, the heat generated during the operation of the lamp can be conducted to the external frame and the backboard and then flowed out to maintain the light quality of the backlight module. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The accompany drawings incorporated in and forming a part of the specification illustrate several aspects of the present invention, and together with the description serve to explain the principles of the invention. In the drawings: 
       FIG. 1A  is a perspective view illustrating one of the preferred embodiments of the present invention providing an electrode sheath of the backlight module contacted to the inside of the external frame. 
       FIG. 1B  is a construction drawing illustrating one of the preferred embodiments of the present invention providing an electrode sheath of the backlight module contacted to the inside of the external frame and the backboard at the same time. 
       FIG. 1C  is a construction drawing illustrating one of the better embodiments of the present invention providing two adjacent lamps sharing one electrode sheath in the backlight module. 
   

   DESCRIPTION OF THE PREFERRED EMBODIMENT 
   In accordance with one of the preferred embodiments of the present invention, a backlight module with a heat-dissipating structure is provided. First, referring to  FIG. 1A , showing a 3-dimensional view of the back of the backlight module (assume the surface of the light output of the backlight module is the front side). The main structure of the backlight module  1  includes a plurality of lamps  11 , a support bracket  12  for supporting the lamps  11 , which is located on the opposite sides and inside the backlight module, and an external frame  13  disposed in the surrounding of the lamps  11  and the support bracket  12 . In the present invention, the external frame  13  is also called the front bezel, which is made by metal or other thermal conductive materials. And the support bracket  12  has a groove-type structure, so that a V-shaped cross-section is formed. Wherein the bottom plate  121  with the groove shape inside the support bracket  12  disposes the optical sliced set  14  and the display plate  15  together with the shelf  131  vertically extended from the external frame  13 . The optical sliced set  14  and the display plate  15  are clipped by the bottom plate  121  of the groove-type structure inside the support bracket  12  and the shelf  131  vertically extended from the external frame  13 . Besides, in the outside of the optical sliced set  14  and display plate  15  and between the support bracket  12  and the external frame  13 , the backlight module  1  disposed in at least one frame  16  and the shelf  161  extended vertically from the frame  16  to be the buffer material when the multi-layers&#39; elements assembled in the stack. And the material of the frame  16  can be chosen from a plastic or other high polymer material. 
   Still referring to  FIG. 1A , in the present embodiment, the electrode  111  in the two ends of the each lamp  11  is encapsulated by an electrode sheath  17  and avoided the situation of the electric leakage happening. And the groove  171  is formed corresponding to the electrode  111  inside the electrode sheath  17 , and is connected to the conductive wire (not shown) and provided the power. Besides, the two corresponding sides of the support bracket  12  in the backlight module  1  formed a holding plate and coupled with the electrode sheath  17 , for example, there are the corresponding electrode sheath  17  and the first notch  122  and  123  formed in the two sides of the groove shape of the support bracket  12 . Therefore, the electrode sheath  17  is disposed in the corresponding first notch  122  and  123 , and the outside of its surface is contacted to the inside of the external frame  13 . If there is a frame  16  is disposed between the support bracket  12  and the external frame  13  in the present invention, the notch  162  is formed as the look of the corresponding electrode sheath  17  and then placed in the frame  16 . 
   In the backlight module of the present invention, the heat-dissipating of the lamp is achieved by the cooperation of the electrode supporting cover  17  and the external frame  13 . Therefore, in the embodiment, an electrode supporting cover  17  with good dielectric properties and thermal conductivity is used, for example, a rubber with high thermal conductivity is chosen. Thereafter, the electrode supporting cover  17  can have the functions of the electrical isolation and the protection, the heat generated during operating the lamp  11  can be flowed out from the electrode  17  and conducted to the external frame  13 , and have the result of the heat-dissipating and maintain the lighting quality of the backlight module. On the other hand, in the embodiment, the electrode sheath  17  is formed a raised portion  172  in the side faced to the lamp  11 . The look of the raised portion  172  is fitted with the first notch  122 . Therefore, when the electrode sheath  17  is disposed in the first notch  122 ,  123 , and notch  162 , the raised portion  172  is inserted into the first notch  122  and the holding portion  173  is against to the support bracket  12  and closed the first notch  122  to firm the electrode sheath  17 . 
   In the embodiment, there are the first notch  122 ,  123 , and notch  162  formed in the support bracket  12  and the frame  16  corresponding to the raised portion  172  and the shape of the electrode sheath  17  itself. But it is not limited the U-type notch provided in the embodiment, as long as the electrode sheath  17  can be fitted to each other and assembled together. For example, when the electrode sheath  17  has a V or wedge type raised portion and body, it can be formed V or wedge openings in the support bracket  12  or frame  16 . However, no matter how the electrode sheath  17  is disposed on the support bracket  12  and the frame  16 , the electrode sheath  17  can be contacted with the external frame  13 . Therefore, the lamp  11  can conduct the heat generating during the operation to the external frame  13  and help the heat-dissipating. 
   Referring to the  FIG. 1B , when each of lamps  11  is disposed in the support bracket  12  and the frame  16  by the electrode sheath  17 , the backboard  18  made by metal or other thermal conductive materials is disposed in the back of the backlight module  1  and firmed the electrode protecting  17  and the support bracket  12 . At this time, the backboard  18  can be stuck to one of the electrode sheaths  17  that can conduct the heat generating at the operation of the lamp  11  to the external frame  13  and backboard  18  and enhance the effect of the heat-dissipating. And the heat generating at the operation of the lamp  11  can flow out to the backboard by air. Therefore, in the embodiment, the heat-dissipating structure provided in the backlight module can conduct the heat of the backlight module  1  to the external frame  13  and backboard  18  by contacting or air and then flowed out. 
   Referring to the  FIG. 1A , in the embodiment, the electrode  111  of each lamps should correspond to an electrode sheath  17 . But, in the other embodiments of the present invention, the same side of the electrode in a plurality of the parallel lamps can share the same one electrode sheath. And the electrode sheath  17  can be formed a plurality of grooves corresponding to the outside of the electrode sheath. For example, referring to the  FIG. 1C , the electrode  111 A and  111 B of two adjacent lamps  11  can be disposed in the groove  171 A and  171 B of the electrode sheath  17  and there are notch  122 A,  122 B,  123  and  162  formed in the support bracket  12  and the frame  16  can be fitted in the shape of the electrode sheath  17 . Therefore, it can increase the surface area of the electrode sheath  17  contacted with the external frame  13  to enhance the efficiency of the heat-dissipating. The electrode sheath  17  provided in the present invention can be used in the non-linear lamp, such as U-type or S-type lamp, and the two extreme ends of the electrode can be disposed in the groove of the electrode sheath  17  and conduct the heat to the external frame  13  by the electrode sheath. 
   The foregoing description is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obvious modifications or variations are possible in light of the above teachings. In this regards, the embodiment or embodiments discussed were chosen and described to provide the best illustration of the principles of the invention and its practical application to thereby enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the invention as determined by the appended claims when interpreted in accordance with the breadth to which they are fairly and legally entitled.