Abstract:
A direct backlight module comprises a first frame, at least two light sources, and a back board. The back board is fixed to the first frame and comprises at least two back slices connected to each other. Each of the at least back slices slips out from the back board.

Description:
FIELD OF THE DISCLOSURE 
       [0001]    The present disclosure relates to backlight modules, and more particularly to a backlight module with a detachable back slice, and a liquid crystal display with the same. 
       GENERAL BACKGROUND 
       [0002]    Liquid crystal displays (LCDs) are commonly used as display devices for compact electronic apparatuses, because they provide good quality images and they are also very thin. Because liquid crystal molecules in an LCD do not emit any light themselves, the liquid crystal molecules have to be lit by a separate light source so as to clearly and sharply display text and images. Therefore, LCDs usually require backlight modules. However, if these backlight modules become broken, it is often very difficult to replace them. 
         [0003]    What is needed, therefore, is a backlight module that can overcome the above-described deficiency. What is also need is an LCD employing such a backlight module. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0004]    The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present backlight module and LCD. In the drawings, like reference numerals designate corresponding parts throughout various views, and all the views are schematic. 
           [0005]      FIG. 1  is an exploded isometric view of an LCD according to a first embodiment of the present disclosure. 
           [0006]      FIG. 2  is an enlarged view of a circled portion II of  FIG. 1 . 
           [0007]      FIG. 3  is an enlarged view of a circled portion III of  FIG. 1 . 
           [0008]      FIG. 4  is an enlarged isometric view of a back slice of the LCD of  FIG. 1 . 
           [0009]      FIG. 5  is a side cross-sectional view of the back slice of  FIG. 4 . 
           [0010]      FIG. 6  is an enlarged isometric view of part of a back board of the LCD of  FIG. 1 . 
           [0011]      FIG. 7  is a side cross-sectional view of part of the assembled back board of  FIG. 6 . 
           [0012]      FIG. 8  is an assembled view of a backlight module of the LCD of  FIG. 1 , omitting a masking tape and a plurality of optical films thereof. 
           [0013]      FIG. 9  is a side cross-sectional view of the assembled backlight module of  FIG. 8 , but omitting the diffuser thereof. 
           [0014]      FIG. 10  is an enlarged isometric view of a back slice of an LCD according to a second embodiment of the present disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0015]    Reference will now be made to the drawings to describe certain inventive embodiments of the present disclosure in detail. 
         [0016]    Referring to  FIG. 1 , an LCD  10  according to a first embodiment of the present disclosure includes a front frame  11 , a liquid crystal panel  12 , and a direct backlight module  100 . The front frame  11  and the direct backlight module  100  collectively define a space to receive the liquid crystal panel  12 . 
         [0017]    The front frame  11  is rectangularly shape and includes two opposite first side walls  111 , two opposite second side walls  112 , and a rectangular connector  113  defining a hollow space  117  in a middle thereof. The two first side walls  111  and the two second side walls  112  extend towards to the same direction from edges of the connector  113  and are perpendicular to the connector  113 . Each of the first side walls  111  includes three first holes  114  defined therein. Each of the second side walls  112  includes two second holes  119  therein. The hollow space  117  corresponds to an active area of the liquid crystal panel  12 . 
         [0018]    The direct backlight module  100  includes a diffuser  110 , a plastic frame  120 , two side covers  130 , a back board  150 , and a light source. The light source includes a plurality of lamps  140 . The diffuser  110  is rectangularly shape. An area of the diffuser  110  is greater than the active area of the liquid crystal panel  12 . 
         [0019]    The plastic frame  120  is rectangularly structure including an opening  129  defined in a middle thereof. The plastic frame  120  further includes two opposite first side arms  121  and two opposite second side arms  122 . Each of the first side arms  121  includes a first arm part  126 , and a second arm part  127  perpendicular to the first arm part  126 . The two second arm parts  127  are parallel to each other, and extend along a same direction. The two first arm parts  126  and the two second side arms  122  define the opening  129 . Each second arm part  127  includes three first protrusions  124  protruding diverge from the opening  129  and a channel  1251 ,  1252  adjacent to the opening  129 . The first protrusions  124  correspond to the first holes  114  of the first side walls  111 , respectively. The back board  150  is fixed to the plastic frame  120  via the channels  1251 ,  1252 . Referring also to  FIG. 2  and  FIG. 3 , a cross-section of the channel  1251  is substantially L-shaped. The channel  1252  includes a passageway  1255  and a U-shaped channel (not labeled). The cross-section of the passageway  1255  is a beeline (not labeled). The cross-section of the U-shaped channel is substantially U-shaped. An end of the U-shaped links to the cross-section of an inside surface of the second arm part  127  via the beeline. Each of the second side arms  122  includes a plurality of concavities  128 . A support  123  extends towards the opening  129  from the two first arm parts  126  and the second side arms  122 . 
         [0020]    Each of the two side covers  130  is elongated along an axis. A surface of each side cover  130  includes two second protrusions  134 . An opposite surface of each side cover  130  facing to the plastic frame  120  includes a plurality of tenons  138  extending perpendicular to the surface thereon. The second protrusions  134  correspond to the second holes  119 . Each of the tenons  138  corresponds to the concavity  128 . The second protrusions  134  correspond to the second holes  119 . 
         [0021]    Referring also to  FIG. 4  to  FIG. 7 . The back board  150  includes a plurality of back slices  160  connected and parallel to each other one by one. Each back slice  160  includes two holders  161 , a back piece  162 , and two linkers  163 . The two linkers  163  hold the back piece  162  and form a room to receive the lamp  140 . The back piece  162  is rectangularly shape. The two holders  161  are disposed on two opposite ends of the same surface of the back piece  162  which can hold the lamp  140  on the back slice  160 . Each linker  163  includes a plank  1631 , and a flake  1633  connecting to the plank  1631 . The plank  1631  and the back piece  162  define an obtuse angle. The flake  1633  is parallel to the back piece  162 . A first fasten organ, just like a slide  164 , extends from an edge of one plank  1631  and is perpendicular to the back piece  162 . A second fasten organ, just like a U-shaped chute  165 , extends from an edge of the other plank  1631 . An outline of the slide  164  corresponds to an inline of the U-shaped chute  165 . 
         [0022]    With reference to  FIG. 8  and  FIG. 9 , the lamps  140  are received in back slices  160 , respectively. Ends of the lamp  140  are held by the holders  161 . One slide  164  of the back slice  160  slips into the other U-shaped chute  165  of the other back slice  160 . The back slices  160  are connected to each other to form the back board  150  by using above method. The channel  1251  corresponds to receive the slide  164  and a part of the flake  1633 . The channel  1252  receives the U-shaped chute  165  and a part of the flake  1633 . 
         [0023]    The tenons  138  of the side cover  130  are received in the concavities  128  of the second side arms  122 , so as to fix the side cover  130  to the plastic frame  120 . The diffuser  110  is disposed on the opening  129  and contacts with the support  123 . The liquid crystal panel  12  is disposed between the front frame  11  and the direct backlight module  100 . The first protrusions  124  and the second protrusions  134  are received in the first holes  114  and second holes  119  to fix the whole LCD  10 . Each back slice  160  can be detached and associated freely from the back board  150  if the lamp  140  is damaged and needs to be replaced. To replace the lamp  140 , one would need to only detach the side cover  130  and the back slice  160  of the lamp  140  that is damaged, and replace it with a new lamp, then associate the back slice  160  to the back board  150  by the slide  164  and the U-shaped chute  165  slipping into the channels  1251 ,  1252 . 
         [0024]    Referring to  FIG. 10 , an LCD  20  according to a second embodiment of the present disclosure is similar to the LCD  10 . However, a back slice  260  includes a plurality of light sockets  261 , a back piece  262 , and four mini connectors  269 . The back piece  262  is rectangularly shape. The four mini connectors  269  are disposed on two sides of each of two ends of the back piece  262 , respectively. Each mini connector  269  includes a linker  263  and a slide  264  or a U-shaped chute  265 . The linker  263  includes a plank  2631  and a flake  2633  connected to the plank  2631 . The plank  2631  and the back piece  262  connected to the plank  2631  define an obtuse angle. The flake  2633  is parallel to the back piece  262 . A first fasten organ, just like a slide  264 , extends from an edge of one plank  2631  and perpendicular to the back piece  262 . A second fasten organ, just like a U-shaped chute  265 , extends from an edge of the other plank  2631 . The mini connector  269  defines a gap  266  on the ends of the back piece  262 . A projection of the mini connector  269  to the surface of the back piece  262  is just the gap  266 . The light sockets  261  fasten light emitting diodes (LEDs) as a light source. Since each the back slice  260  can be detached and associated freely from a back board, so when the LED is needed to replace, an exchanging process is convenient. 
         [0025]    It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its material advantages, the examples hereinbefore described merely being preferred or exemplary embodiments of the disclosure.