Patent Document

FIELD OF THE INVENTION 
       [0001]    The present invention relates to a technology of liquid crystal display, and more particularly, to a liquid crystal display device and a backlight module incorporated within the liquid crystal display device. 
       BACKGROUND OF THE INVENTION 
       [0002]    True positioning of an optical film within a backlight module can greatly affect the optical quality of the backlight module. Referring to  FIGS. 1 and 2 .  FIG. 1  is a perspective view of a backlight module  10  made in accordance with the present invention.  FIG. 2  is an enlarged view of an optical film  12  encircled portion A of  FIG. 1 . In the current practice, the optical film  12  is defined with a plurality of positioning holes  120  along its peripheral, and the backboard  11  is provided with a plurality of positioning wedges  13  matching with the positioning holes  120 . With the interengagement between the positioning holes  120  and the wedges  13 , the optical film  12  is secured thereto. 
         [0003]    It has been found by the inventor over a long period of observation that a hanger  121  of the optical film  12  becomes smaller and smaller and its intensity can not be ensured. As a result, the reliability of the optical film  12  is jeopodarized. 
       SUMMARY OF THE INVENTION 
       [0004]    In order to resolve the technical issues encountered by the prior art, the present invention provides a backlight module and a liquid crystal display device incorporated with the backlight module. The reliability of the reflector within the backlight module can be ensured, and the utilization of the light is also upgraded. The present invention is specially suitable for the narrow-boarder design. 
         [0005]    In order to resolve the technical issue encountered by prior art, the present invention provides a technical solution by introducing a backlight module comprises a backboard, an optical film, and a positioning device. At least a positioning device being arranged on a perimeter of the backboard and extending upward form a top surface of the backboard, wherein a peripheral of the optical film is provided with at least a tab having a retaining opening defined therein to envelop onto the positioning device. Wherein the backlight module further includes an enhancing frame matched to the tab and arranged thereunder or thereabove making the tab, distant to a center of the optical film, inherited with intensity stronger than other portions of the optical film. And wherein the enhancing frame is attached to the top or bottom surfaces of the tab. 
         [0006]    Wherein the material used to make the enhancing frame is polyethylene terephthalate. 
         [0007]    Wherein the tab is glued to the peripheral of the optical film, and the tab has intensity stronger than the optical film. 
         [0008]    Wherein the tab is made from polyethylene terephthalate. 
         [0009]    In order to resolve the technical issue encountered by prior art, the present invention provides a technical solution by introducing a backlight module comprises a backboard, an optical film, and a positioning device. At least a positioning device being arranged on a perimeter of the backboard and extending upward form a top surface of the backboard, wherein a peripheral of the optical film is provided with at least a tab having a retaining opening defined therein to envelop onto the positioning device. And wherein the tab distant to a center of the optical film, inherited with intensity stronger than other portions of the optical film. 
         [0010]    Wherein the backlight module further includes an enhancing frame matched to the tab and arranged thereunder or thereabove making the tab, distant to a center of the optical film, inherited with an intensity stronger than other portions of the optical film. 
         [0011]    Wherein the material used to make the enhancing frame is polyethylene terephthalate. 
         [0012]    Wherein the tab is glued to the peripheral of the optical film, and the tab has intensity stronger than the optical film. 
         [0013]    Wherein the tab is made from polyethylene terephthalate. 
         [0014]    In order to resolve the technical issue encountered by prior art, the present invention provides an technical solution by introducing a liquid crystal display device comprises a displaying panel, and a backlight module disposed below the displaying panel The backlight module comprises a backboard, an optical film, and a positioning device. At least a positioning device being arranged on a perimeter of the backboard and extending upward form a top surface of the backboard, wherein a peripheral of the optical film is provided with at least a tab having a retaining opening defined therein to envelop onto the positioning device. And wherein the tab, distant to a center of the optical film, inherited with intensity stronger than other portions of the optical film. 
         [0015]    Wherein the backlight module further includes an enhancing frame matched to the tab and arranged thereunder or thereabove making the tab, distant to a center of the optical film, inherited with an intensity stronger than other portions of the optical film. 
         [0016]    Wherein the material used to make the enhancing frame is polyethylene terephthalate. 
         [0017]    Wherein the tab is glued to the peripheral of the optical film, and the tab has intensity stronger than the optical film. 
         [0018]    Wherein the tab is made from polyethylene terephthalate. 
         [0019]    The present invention can be concluded with the following advantages. As compared with the prior art, the tab of the optical film can be readily enhanced by the enhancing frame so as to increase and upgrade the intensity of the tab. By this arrangement, the hanger of the tab is intensified, and the positioning of the optical film is ensured, and this is specially suitable for the design of narrow-boarder. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0020]      FIG. 1  is a perspective view of a backlight module made in accordance with the present invention; 
           [0021]      FIG. 2  is an enlarged view of art optical film encircled portion A of  FIG. 1 ; 
           [0022]      FIG. 3  is an assembled and perspective view of a backlight module made in accordance with a first embodiment of the present invention; 
           [0023]      FIG. 4  is an enlarged view of an encircled portion  8  shown in  FIG. 3 ; 
           [0024]      FIG. 5  is a cross sectional view of an optical film and an enhancing Frame after assembly in accordance with a first embodiment of the present invention; 
           [0025]      FIG. 6  is an assembled view of s backlight module made in accordance with a second embodiment of the present invention; 
           [0026]      FIG. 7  is an enlarged view of an encircled portion C of an optical film shown in  FIG. 6 ; 
           [0027]      FIG. 8  is a cross sectional view of the optical film and the tab after assembly in accordance with a first embodiment of the present invention; and 
           [0028]      FIG. 9  is a cross sectional view of a liquid crystal display device made in accordance with the present invention. 
       
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
       [0029]    In order to give a better and thorough understanding to the whole and other intended purposes, features and advantages of the technical solution of the present invention, detailed description will be given with respect to preferred embodiments provided and illustrated herebelow in accompanied drawings. Apparently, with the spirit of the embodiments disclosed, person in the skilled in the art can readily come out with other modifications as well, as improvements without undue experiment. In addition, other drawings can be readily achieved based on the disclosed drawings. 
         [0030]    Referring to  FIGS. 3 ,  4  and  5 .  FIG. 3  is an assembled and perspective view of a backlight module  20  made in accordance with a first embodiment of the present invention.  FIG. 4  is an enlarged view of an encircled portion B shown in  FIG. 3 .  FIG. 5  is a cross sectional view of an optical film and an enhancing frame after assembly in accordance with a first embodiment of the present invention. 
         [0031]    The backlight module  20  made according to a first embodiment of the present invention includes a backboard  21 , an optical film  22 , a positioning device  23 , and an enhancing frame  24 . The positioning device  23  is arranged onto an edge of the backboard  21  and disposed above a top surface of the backboard  21 . The optical film  22  is provided with a tab  25  in which a retaining opening  250  is defined therein. The retaining opening  250  can engage with the positioning device  23 . The retaining opening  250  of the tab  25  has a rectangular shape, and the positioning device  23  has a cubic shape matching with retaining opening  250 . Of course, the shape and configuration of the retaining opening  250  of the tab  25  and the positioning device  23  can be other suitable shape other than rectangular and cubic. In addition, the number of the positioning device  23  can be multiple as well, while the number of the tab  25  arranged along the peripheral of the optical film  22  can be also increased with respect to the number of the positioning device  23 . 
         [0032]    The enhancing frame  24  is disposed onto a bottom of the tab  25 . The enhancing frame  24  is dimensioned to match with the tab  25 , and it has intensity stronger than the intensity of the optical film  22 . The enhancing film  22  can be made from the polyethylene terephthalate (or PET) or other material having a stronger strength. The enhancing frame  24  is attached to a top surface or bottom surface of the tab  25  by a double-side tape. Of course, other suitable measurements can be applied as well. By the provision of the enhancing frame  24  to encircle the tab  25 , the intensity of the tab  25  wilt become stronger then other portions of the optical film  22 , Accordingly, a hanger  251  of the tab  25  is enhanced. In other embodiment, the enhancing frame  24  can be disposed onto the top surface of the tab  25 , and this can again enhance the hanger  251  of the tab  25 . Accordingly, no limitation should be imposed thereon. 
         [0033]    In addition, in other embodiment, the enhancing frame  24  can be omitted, and the tab  25  located on the peripheral of the optical film  22  can be directly replaced with other material stronger than the optical film  22 . For example, the polyethylene terephthalate (or PET) used for making the enhancing frame  24  can be used. 
         [0034]    It is understandable that the tab  25  of the optical film  22  of the backlight module  20  in accordance with the first embodiment can be enhanced through the enhancing frame  24  which has a stronger intensity as compared to other part of the optical film  22 . By this arrangement, the hanger  251  of the tab  25  is intensified, and the positioning of the optical film  22  is ensured, and this is specially suitable for the design of narrow-boarder. 
         [0035]    Referring to  FIGS. 6 ,  7  and  8 .  FIG. 6  is an assembled view of a backlight module  30  made in accordance with a second embodiment of the present invention.  FIG. 7  is an enlarged view of an encircled portion C of an optical film  32  shown in  FIG. 6 .  FIG. 8  is a cross sectional view of a tab  32  of an optical film  32  and the tab  34  after assembly in accordance with a first embodiment of the present invention. 
         [0036]    The backlight module  30  made according to a second embodiment of the present invention includes a backboard  31 , an optical film  32 , a positioning device  33 , and a tab  34 . The positioning device  33  is arranged onto an edge of the backboard  31  and disposed above a top surface of the backboard  31 . The optical film  32  is provided with a tab  34  in which a retaining opening  340  is defined therein. The retaining opening  340  can engage with the positioning device  33 . The retaining opening  340  of the tab  34  has a rectangular shape, and the positioning device  33  has a cubic shape matching with retaining opening  340 . Of course, the shape and configuration of the retaining opening  340  of the tab  34  and the positioning device  23  can be other suitable shape other than rectangular and cubic. In addition, the number of the positioning device  33  can be multiple as well, while the number of the tab  34  arranged along the peripheral of the optical film  22  can be also increased with respect to the number of the positioning device  33 . 
         [0037]    The tab  34  is disposed onto a bottom of the peripheral of the optical film  32 . The tab  34  has intensity stronger than the intensity of the optical film  32 , The tab  34  can be made from the polyethylene terephthalate (or PET) or other material having a stronger strength. The tab  34  is attached to a top surface or bottom surface of the tab  34  by a double-side tape. Of course, other suitable measurements can be applied as well. By the provision of the tab  34  arranged to the peripheral of the optical film  32 , the intensity of the tab  34  will become stronger then other portions of the optical film  32 . Accordingly, a hanger  341  of the tab  34  is enhanced. In other embodiment, the tab  34  can be disposed onto the top surface of the optical film  25 , and this can again enhance the hanger  341  of the tab  32 . Accordingly, no limitation should be imposed thereon. 
         [0038]    It is understandable that the enhancement along the peripheral of the optical film  32  of the backlight module  30  in accordance with the second embodiment can be enhanced through the tab  34  which has a stronger intensity as compared to other part of the optical film  32 . By this arrangement, the hanger  341  of the tab  34  is intensified, and the positioning of the optical film  32  is ensured, and this is specially suitable for the design of narrow-boarder. 
         [0039]    Referring to  FIGS. 3 ,  4 ,  5  and  9 .  FIG. 9  is a cross sectional view of a liquid crystal display device  40  made in accordance with the present invention. 
         [0040]    The liquid crystal display device  40  made in accordance with the present invention includes a display panel  41  and the backlight module  20 . 
         [0041]    The backlight module  20  is disposed under the display panel  41  so as to provide its illumination. The backlight module  20  made according to a first embodiment of the present invention includes a backboard  21 , an optical film  22 , a positioning device  23 , and an enhancing frame  24 . The positioning device  23  is arranged onto an edge of the backboard  21  and disposed above a top surface of the backboard  21 . The optical film  22  is provided with a tab  25  in which a. retaining opening  250  is defined therein. The retaining opening  250  can engage with the positioning device  23 . The retaining opening  250  of the tab  25  has a rectangular shape, and the positioning device  23  has a cubic shape matching with retaining opening  250 . Of course, the shape and configuration of the retaining opening  250  of the tab  25  and the positioning device  23  can be other suitable shape other than rectangular and cubic. In addition, the number of the positioning device  23  can be multiple as well, while the number of the tab  25  arranged along the peripheral of the optical film  22  can be also increased with respect to the number of the positioning device  23 . 
         [0042]    The enhancing frame  24  is disposed onto a bottom of the tab  25 . The enhancing frame  24  is dimensioned to match with the tab  25 , and it has intensity stronger than the intensity of the optical film  22 . The enhancing film  22  can be made from the polyethylene terephthalate (or PET) or other material having a stronger strength. The enhancing frame  24  is attached to a top surface or bottom surface of the tab  25  by a double-side tape, Of course, other suitable measurements can be applied as well. By the provision of the enhancing frame  24  to encircle the tab  25 , the intensity of the tab  25  will become stronger then other portions of the optical film  22 . Accordingly, a hanger  251  of the tab  25  is enhanced. In other embodiment, the enhancing frame  24  can be disposed onto the top surface of the tab  25 , and this can. again enhance the hanger  251  of the tab  25 . Accordingly, no limitation should be imposed thereon. The liquid crystal display device  40  can be a Thin Film Transistor-Liquid Crystal Display (or TFT-LCD). Of course, it can be other suitable liquid crystal device, and not limitation shall be imposed. 
         [0043]    In addition, in other embodiment, the enhancing frame  24  can be omitted, and the tab  25  located on the peripheral of the optical film  22  can be directly replaced with other material stronger than the optical film  22 . For example, the polyethylene terephthalate (or PET) used for making the enhancing frame  24  can be used. In other embodiment, the tab  25  and the enhancing frame  24  can be also omitted, and replaced with an tab having an intensity stronger than the optical film  22 , and attached to a top or bottom surface of the optical film  22 . The tab can be made from the polyethylene terephthalate (or PET) or other material having intensity stronger than the optical film  22 . With the interengagement between the tab and the positioning device  23 , the reliability of positioning of the optical film  22  can be ensured, and no limitation should be imposed. 
         [0044]    It is understandable that the tab  25  of the optical film  22  of the backlight module  20  incorporated within the liquid crystal display device  40  in accordance with the present invention can be enhanced through the enhancing frame  24  which has a stronger intensity as compared to other part of the optical film  22 . By this arrangement, the hanger  251  of the tab  25  is intensified, and the positioning of the optical film  22  is ensured, and this is specially suitable for the design of narrow-boarder. 
         [0045]    Embodiments of the present invention have been, described, but not intending to impose any unduly constraint to the appended claims. Any modification of equivalent structure or equivalent process made according to the disclosure and drawings of the present invention, or any application thereof, directly or indirectly, to other related fields of technique, is considered encompassed in the scope of protection defined by the clams of the present invention.

Technology Category: 3