Abstract:
A display device is disclosed that includes a frame assembly. A first screen panel and a second screen panel are assembled together with the frame assembly and electrically coupled with each other. A main circuit board electrically connected with both the first and second screen panels defines a receiving opening upon which an underside of the second screen panel is rested. A gap is defined between the second screen panel and the main circuit board when the underside of the second screen panel is rested upon the receiving opening of the main circuit board. Wherein the frame assembly has at least one positioning member configured to be inserted into the gap for restraining the second screen panel in place.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    This present invention relates to a display device, and more specifically to a dual-screen display device. 
         [0003]    2. The Related Art 
         [0004]    Conventionally, a dual-screen display device includes a main screen panel, a secondary screen panel, a backlight module and a frame assembly. The main screen panel, the secondary screen panel and the backlight module are fixed in the frame assembly. 
         [0005]    An auxiliary tool is used to assemble the secondary screen panel in the frame assembly, so that in the process of assembling the dual-screen display device, some incoming dust will most likely pollute the dual-screen display device. Besides, by using the auxiliary tool, the cost of manufacturing the dual-screen display device is raised. 
       SUMMARY OF THE INVENTION 
       [0006]    An object of the invention is to provide an improved display device that is assembled without any auxiliary tool. The display device includes a frame assembly. A first screen panel and a second screen panel are assembled together with the frame assembly and electrically coupled with each other. A main circuit board electrically connected with both the first and second screen panels defines a receiving opening upon which an underside of the second screen panel is rested. A gap is defined between the second screen panel and the main circuit board when the underside of the second screen panel is rested upon the receiving opening of the main circuit board. Wherein the frame assembly has at least one positioning member configured to be inserted into the gap for restraining the second screen panel in place. 
         [0007]    According to above description, since the positioning member of the frame assembly being inserted into the gap defined between the second screen panel and the main circuit board, the process of assembling the second screen panel on the frame assembly is simple. It is obvious that the assembly process of the second screen panel on the frame assembly doesn&#39;t need any auxiliary tool, so the cost of manufacturing the display device is reduced and the time of assembling the display device is cut down. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0008]    The invention, together with its objects and the advantages thereof may be best understood by reference to the following description taken in conjunction with the accompanying drawings, in which: 
           [0009]      FIG. 1  is a perspective view of a first embodiment of a dual-screen display device; 
           [0010]      FIG. 2  is an exploded perspective view of the dual-screen display device; 
           [0011]      FIG. 3  is a perspective view of a first frame of the dual-screen display device shown in  FIG. 1 ; 
           [0012]      FIG. 4  is a partially enlarged view of the encircled portion labeled II of  FIG. 3 ; 
           [0013]      FIG. 5  is an assembled perspective view of a main circuit board, a main screen panel and a secondary screen panel of the dual-screen display device; 
           [0014]      FIG. 6  is an assembled perspective view of the dual-screen display device; 
           [0015]      FIG. 7  is a cross-sectional view taken along line VII-VII of  FIG. 1 ; 
           [0016]      FIG. 8  is a perspective view of a second embodiment of a dual-screen display device; 
           [0017]      FIG. 9  is an exploded perspective view of the dual-screen display device of  FIG. 8 ; 
           [0018]      FIG. 10  is a perspective view of a main frame of the dual-screen display device of  FIG. 8 ; and 
           [0019]      FIG. 11  is a cross-sectional view taken along line XI-XI of  FIG. 8 . 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0020]    First referring to  FIGS. 1 and 2 , in a first embodiment of the present invention, a dual-screen display device  1  has a frame assembly, a main screen panel  30 , a backlight module  20  and a secondary screen panel  40  all of which are fixed on the frame assembly. The frame assembly contains a first frame  11 , a second frame  12  and a third frame  13 . 
         [0021]    Referring to  FIGS. 2-4 , the first frame  11  has a rectangular base board  110 . Each side of the base board  110  extends upward vertically to form a side wall  111 . A plurality of grooves  112  and bulges  113  are formed on the side wall  111 . One of the side walls  111  defines an outer opening  114  passing therethrough. The middle portion of the base board  110  defines an opening  115  in rectangular shape. A plurality of auxiliary slots  116  is formed in the base board  110  around the opening  115 . An outer edge of the auxiliary slot  116  extends vertically downwardly to form a resisting wall  117  showing a long and narrow piece shape. A twin adhesive tape  60  is glued on the backside of the base board  110  along inner sides of the resisting walls  117 . 
         [0022]    Referring to  FIG. 2 , the second frame  12  made of resin material is arranged in the first frame  11 . The second frame  12  has four rims  120  defined at its periphery, and these rims  120  define cooperatively a first rectangular space  121 . All outer edges of the rims  120  extend vertically upward to form a side wall  122  respectively. One of the side walls  122  defines an inner opening  125  passing therethrough corresponding to the outer opening  114  of the first frame  11 . The side walls  122  project outside to form a plurality of protrusions  123  engaged with the grooves  112  of the first frame  11 . 
         [0023]    The third frame  13  is covered on the first frame  11  such that the second frame  12  is received in the first frame  11  and disposed between the first frame  11  and the third frame  13 . The third frame  13  has four side plates  130  which define a second rectangular space  131 . Each side plate  130  extends vertically downward to form a side wall  132 . Each side wall  132  defines a plurality of slots  134  corresponding to the bulges  113  of the first frame  11 . One of the side walls  132  defines a notch  135  passing therethrough and corresponding to the outer opening  114 . 
         [0024]    Referring to  FIGS. 2 and 5 , the main screen panel  30  and the secondary screen panel  40  are connected with a main circuit board  50 . The main circuit board  50  is a flexible printed circuit board in the first embodiment. The middle portion of the main circuit board  50  forms a receiving opening  53  in rectangular shape for receiving the secondary screen panel  40  thereupon. One end of the main circuit board  50  has a main connecting portion  51  which is used to connect with the main screen panel  30 , and the other end of the main circuit board  50  defines a secondary connecting portion  52  used to connect with the secondary screen panel  40 . Some signal wires (not shown) are arranged in the main connecting portion  51  and the secondary connecting portion  52 . When the secondary screen panel  40  and the main circuit board  50  are arranged at the backside of the base board  110 , the resisting walls  117  are located in a gap  54  defined between the secondary screen panel  40  and the main circuit board  50 . 
         [0025]    Please refer to  FIGS. 2 ,  5 ,  6 , and  7 . In assembling the dual-screen display device  1  of the first embodiment, firstly, the second frame  12  is assembled in the first frame  11 . The protrusions  123  are fixed in the grooves  112  of the first frame  11 . Then, the backlight module  20  is arranged in the first rectangular space  121  of the second frame  12 . Edges of the backlight module  20  respectively resist against edges of the opening  115 . Next, the main screen panel  30  is arranged on the backlight module  20  and adhered together with the rims  120 . The third frame  13  is covered on the first frame  11  and the second frame  12 . The side walls  132  of the third frame  13  cover the side walls  111  of the first frame  11 , and the bulges  113  are engaged in the slots  134 , so the first frame  11 , the second frame  12  and the third frame  13  are assembled together. Finally, the secondary screen panel  40  is fixed on the backside of the base board  110 . The main connecting portion  51  of the main circuit board  50  is received in a channel which is defined by the outer opening  114 , the inner opening  125  and the notch  135 . The secondary screen panel  40  resists the resisting walls  117  and is glued to the twin adhesive tape  60 , and then the resisting walls  117  are arranged between the main circuit board  50  and the secondary screen panel  40  to locate the secondary screen panel  40 . 
         [0026]    Referring to  FIGS. 8-11 , a second embodiment of a dual-screen display device  10  is disclosed. The dual-screen display device  10  includes a frame assembly, a backlight module  20 , a main screen panel  30 , a twin adhesive tape  60 , a secondary screen panel  40  and a main circuit board  50 . The frame assembly includes a third frame  13  which is similar in construction as that described in the first embodiment and a main frame  14 . The second embodiment is similar to the first embodiment, and the difference therebetween is that the first frame  11  and the second frame  12  of the first embodiment are substituted for the main frame  14  of the second embodiment. The main frame  14  made of resin material has a base board  140  in rectangular board shape. An opening  145  is defined in the base board  140 . A plurality of resisting walls  147  extends downward from the backside of the base board  140 . Edges of the base board  140  extend vertically upward to form first side walls  141 , and then outer edges of the first side walls  141  extend upward to form second side walls  142  respectively. A plurality of bulges  143  is arranged on the first and second side walls  141 ,  142  corresponding to slots  134  defined on the third frame  13 . The first side wall  141  and the second side wall  142  define a main opening  144  passing therethrough and corresponding to a notch  135  defined on the third frame  13 . 
         [0027]    When the dual-screen display device  10  of the second embodiment is assembled, the backlight module  20  and the main screen panel  30  are received in a space which is defined by the main frame  14  and the third frame  13 . The secondary screen panel  40  resists the resisting walls  147  and is glued on the backside of the main frame  14  by the twin adhesive tape  60 . 
         [0028]    According to above description, since the edges of the secondary screen panel  40  resist the resisting walls  117 ,  147  and are glued on the backside of the base board  110 ,  140 , the process of assembling the secondary screen panel  40  on the first frame  11  or the main frame  14  is simple. It is obvious that the assembly process of the secondary screen panel  40  in the frame assembly doesn&#39;t need any auxiliary tool, so the cost of manufacturing the dual-screen display device  1 ,  10  is reduced and the time of assembling the dual-screen display device  1 ,  10  is cut down. 
         [0029]    Embodiments of the present invention have been discussed in detail. However, these embodiments are merely a specific example for clarifying the technical contents of the present invention and the present invention is not to be construed in a restricted sense as limited to these specific examples. Thus, the spirit and scope of the present invention are limited only by the appended claims.