Abstract:
A display is provided that can prevent uplift of a flexible printed circuit board due to flexure deformation of the flexible printed circuit board. The display includes: a display panel; a frame that houses the display panel; a backlight source that is disposed on the backside of the display panel; and a first flexible printed circuit board for backlight that is electrically connected to the backlight source, and extends from the inside of the frame to the outside of the frame. The frame has an uplift preventing member that prevents uplift of the first flexible printed circuit board.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention relates to a display and a mobile device, and more particularly, to a display that has a flexible printed circuit board, and a mobile device that includes the display.  
       CROSS-REFERENCE TO RELATED APPLICATIONS  
       [0003]     The priority application No. JP2004-345313 upon which this patent application is based is hereby incorporated by reference.  
         [0004]     2. Description of the Background Art  
         [0005]     Conventionally, there have been displays such as liquid crystal display units having flexible printed circuit boards. An example of such a display is disclosed in Japanese Patent Publication No. 3322629. More specifically, Japanese Patent Publication No. 3322629 discloses a liquid crystal display unit that has display panel to which a flexible printed circuit board housed by a metal upper frame and a metal lower frame is connected, and a backlight source that emits light onto the display panel.  
         [0006]     Conventionally, LCD (Liquid Crystal Display) units having small-sized display panels to be used for mobile phone handsets have been known.  FIG. 26  is a perspective view of a conventional LCD unit.  FIG. 27  is an exploded view of the conventional LCD unit shown in  FIG. 26 .  FIG. 28  is a cross-sectional view of the resin frame of the conventional LCD unit shown in  FIG. 26 .  FIGS. 29 through 31  illustrate the structure of the conventional LCD unit. Referring to  FIGS. 26 through 31 , the structure of the conventional LCD unit is described in detail.  
         [0007]     As shown in  FIGS. 26 and 27 , the conventional LCD unit  120  includes an upper frame  101  and a lower frame  102  that are made of metal, a reflective sheet  103 , a resin frame  104 , a light guide plate  105 , lens sheets  106  and  107 , a backlight flexible printed circuit board (backlight FPC board)  108 , light emitting diodes (LEDs)  109 , a diffusion sheet  110 , a display panel  111 , a driver IC  112 , a panel flexible printed circuit board (panel FPC board)  113 , and electronic components  114  and  115 .  
         [0008]     As shown in  FIG. 27 , the upper frame  101  made of metal has an insertion hole  101   a , an opening  101   b  formed in conformity with the display region of the display panel  111 , and a notch portion  101   c  at which the backlight FPC board  108  and the panel FPC board  113  are disposed. The lower frame  102  made of metal has a protruding portion  102   a  to be engaged with the insertion hole  110   a  of the upper frame  101 , and a notch portion  102   b  that is formed at the location corresponding to the notch portion  101   c  of the upper frame  101  and accommodates the backlight FPC board  108  and the panel FPC board  113 . The reflective sheet  103  that reflects light is disposed on the lower frame  102 . As shown in  FIG. 30 , the resin frame  104  is disposed on the reflective sheet  103 . As shown in  FIG. 28 , the resin frame  104  has an opening  104   a  and a FPC inserting portion  104   b  to which the backlight FPC board  108  and the panel FPC board  113  are inserted. As shown in  FIG. 27 , the light guide plate  105  that introduces light onto the entire panel, and the lens sheets  106  and  107  that concentrate light are disposed on the resin frame  104  in this order from the bottom. The backlight FPC board  108  is attached onto the lens sheet  107 . The LEDs  109  for emitting light to the light guide plate  105  are attached to the backlight FPC board  108 . The light emitted from the LEDs  109  diffuses inside the light guide plate  105 , and travels to the lens sheets  106  and  107  that are located above the light guide plate  105 . The light is concentrated by the lens sheets  106  and  107 , and then travels to the display panel  111  via the diffusion sheet  110  that is located above the lens sheets  106  and  107 .  
         [0009]     The backlight FPC board  108  can be deformed through flexure. The backlight FPC board  108  has a LED attaching portion  108   a , an external connecting portion  108   b  extending from the inside of the resin frame  104  to the outside of the resin frame  104 , and a connector inserting portion  108   c . The connector inserting portion  108   c  of the backlight FPC board  108  is mounted to a connector portion  113   a  of the panel FPC board  113 .  
         [0010]     As shown in  FIG. 30 , the external connecting portion  108   b  of the backlight FPC board  108  is designed to be longer than the linear distance between the LED attaching portion  108   a  and the connector inserting portion  108   c , so that the connector inserting portion  108   c  can be easily mounted in the connector portion  113   a . Accordingly, with the connector inserting portion  108   c  being mounted in the connector portion  113   a , the external connecting portion  108   b  of the backlight FPC board  108  is deformed and uplifted.  
         [0011]     As shown in  FIG. 29 , the driver IC  112  and the panel FPC board  113  are attached to the display panel  111 . As shown in  FIG. 26 , the panel FPC board  113  is designed to extend outward from the opening that is formed by the notch portion  101   c  of the upper frame  101  and the notch portion  102   b  of the lower frame  102 . The panel FPC board  113  also has the connector portion  113   a  to which the connector inserting portion  108   c  of the backlight FPC board  108  is inserted as described above. The panel FPC board  113  further has an electronic component attaching portion  113   b  to which the electronic component  114  is mounted. The panel FPC board  113  also has a connector inserting portion  113   c  to be inserted to a connector (not shown). Further, the panel FPC board  113  has an electronic component attaching portion  113   d  to which the electronic component  115  is mounted. Also, a slit  113   e  is formed between the connector inserting portion  113   c  and the electronic component attaching portion  113   d.    
         [0012]     In the conventional LCD unit illustrated in  FIGS. 26 through 31 , the force F 2  generated by the flexure deformation of the external connecting portion  108   b  of the backlight FPC board  108  shown in  FIG. 30  causes the problem of uplifting the backlight FPC board  108  at the portion to which the LEDs  109  are to be attached, as shown in  FIG. 31 . When this problem is caused, the light emitted from the LEDs  109  leaks out of the resin frame  104 , and the light to illuminate the display panel  111  becomes insufficient. As a result, a decrease in the luminance of the display panel  111  is caused. Furthermore, when the portion of the backlight FPC board  108  to which the LEDs  109  are to be attached is uplifted, engagement of the upper frame  101  with the lower frame  102  becomes difficult after the connector inserting portion  108   c  of the backlight FPC board  108  is inserted to the connector portion  113   a  of the panel FPC board  113  at the time of assembling. As a result, the assembling workability becomes lower.  
         [0013]     Also, in the above described structure disclosed in Japanese Patent Publication No. 3322629, it is considered that a member attached to the flexible printed circuit board is uplifted by the force generated by flexure deformation of the flexible printed circuit board, as in the conventional LCD unit illustrated in  FIGS. 26 through 30 . In such a case, the light emitted from the backlight source leaks out of the frame, and the light to illuminate the display panel becomes insufficient. As a result, the problem of a decrease in the luminance of the display panel is caused.  
       SUMMARY OF THE INVENTION  
       [0014]     A general object of the present invention is to eliminate the above disadvantages. A more specific object of the present invention is to provide a display and a mobile device that can prevent uplift of the flexible printed circuit board caused by flexure deformation of the flexible printed circuit board.  
         [0015]     So as to achieve the above objects, a display in accordance with a first aspect of the present invention includes: a display panel; a frame that houses the display panel; a backlight source that is disposed on the backside of the display panel; and a first flexible printed circuit board for emitting backlight that is electrically connected to the backlight source, and extends from the inside of the frame to the outside of the frame, with the frame having an uplift preventing member that prevents uplift of the first flexible printed circuit board.  
         [0016]     As described above, the display in accordance with the first aspect of the present invention has an uplift preventing member for preventing uplift of the first flexible printed circuit board for backlight. Accordingly, the first flexible printed circuit board for backlight and the backlight source can be prevented from being uplifted due to flexure deformation of the first flexible printed circuit board for backlight. Accordingly, the light emitted from the backlight source can be prevented from leaking out of the frame. Thus, a decrease in the luminance of the display panel can be avoided. Furthermore, uplift of the first flexible printed circuit board for backlight and the backlight source can be prevented. Accordingly, the upper frame can be surely engaged with the lower frame at the time of assembling. Thus, the assembling workability can be increased.  
         [0017]     A mobile device in accordance with a second aspect of the present invention includes the above described display in accordance with the first aspect of the present invention. With this structure, a mobile device equipped with a display that can prevent uplift of the first flexible printed circuit board for backlight can be obtained. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0018]      FIG. 1  is a perspective view of a LCD unit having a flexible printed circuit board in accordance with an embodiment of the present invention;  
         [0019]      FIG. 2  is a side view of the LCD unit in accordance with the embodiment shown in  FIG. 1 , where the LCD unit is mounted to a printed circuit board of a mobile phone handset;  
         [0020]      FIG. 3  is an exploded perspective view of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0021]      FIG. 4  is a perspective view illustrating the resin frame and the display panel of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0022]      FIG. 5  is a cross-sectional view illustrating the resin frame and the backlight FPC board of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0023]      FIG. 6  is a perspective view illustrating the display panel of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0024]      FIG. 7  is a cross-sectional view illustrating the connector portion of the backlight FPC board of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0025]      FIG. 8  is a perspective view illustrating the light guide plate, the light emitting diode (LED), and the backlight FPC board of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0026]      FIG. 9  is a side view illustrating the light guide plate, the light emitting diode (LED), and the backlight FPC board of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0027]      FIG. 10  is a perspective view illustrating the light guide plate, the light emitting diode (LED), and the backlight FPC board of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0028]      FIG. 11  is a perspective view illustrating the resin frame of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0029]      FIG. 12  is a front view illustrating the resin frame of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0030]      FIG. 13  is a perspective view illustrating the attachment structure of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0031]      FIG. 14  is a perspective view illustrating the attachment structure of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0032]      FIG. 15  is a perspective view illustrating the attachment structure of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0033]      FIG. 16  is a cross-sectional view illustrating the attachment structure of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0034]      FIG. 17  is a cross-sectional view illustrating the attachment structure of the LCD unit in accordance with the embodiment shown in  FIG. 1 ;  
         [0035]      FIG. 18  is a perspective view of a LCD unit in accordance with a first modification of the embodiment of the present invention;  
         [0036]      FIG. 19  is a cross-sectional view of the LCD unit in accordance with the modification shown in  FIG. 18 ;  
         [0037]      FIG. 20  is a perspective view of a LCD unit in accordance with a second modification of the embodiment of the present invention, where the LCD unit is mounted to the printed circuit board of a mobile phone handset;  
         [0038]      FIG. 21  is a side view of the LCD unit in accordance with the second modification shown in  FIG. 20 , where the LCD unit is mounted to the printed circuit board of a mobile phone handset;  
         [0039]      FIG. 22  is a perspective view of a LCD unit in accordance with a third modification of the embodiment of the present invention, where the LCD unit is mounted to the printed circuit board of a mobile phone handset;  
         [0040]      FIG. 23  is a side view of the LCD unit in accordance with the third modification shown in  FIG. 22 , where the LCD unit is mounted to the printed circuit board of a mobile phone handset;  
         [0041]      FIG. 24  is a perspective view of a LCD unit in accordance with a fourth modification of the embodiment of the present invention, where the LCD unit is mounted to the printed circuit board of a mobile phone handset;  
         [0042]      FIG. 25  is a side view of the LCD unit in accordance with the fourth modification shown in  FIG. 24 , where the LCD unit is mounted to the printed circuit board of a mobile phone handset;  
         [0043]      FIG. 26  is a perspective view of a conventional LCD unit;  
         [0044]      FIG. 27  is an exploded perspective view of the conventional LCD unit shown in  FIG. 26 ;  
         [0045]      FIG. 28  is a perspective view illustrating the resin frame of the conventional LCD unit shown in  FIG. 26 ;  
         [0046]      FIG. 29  is a perspective view illustrating the resin frame and the display panel of the conventional LCD unit shown in  FIG. 26 ;  
         [0047]      FIG. 30  is a cross-sectional view illustrating the attachment structure of the flexible printed circuit board and the connector portion of the conventional LCD unit shown in  FIG. 26 ; and  
         [0048]      FIG. 31  is a cross-sectional view illustrating the attachment structure of the flexible printed circuit board and the connector portion of the conventional LCD unit shown in  FIG. 26 . 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0049]     The following is a description of embodiments of the present invention, with reference to the accompanying drawings.  
         [0050]     Referring to  FIGS. 1 through 17 , a LCD unit  20  in accordance with an embodiment of the present invention is described. In this embodiment, the LCD unit  20  is described as an example of the “display” in the claims.  
         [0051]     As shown in  FIGS. 1 through 3 , the LCD unit  20  in accordance with this embodiment includes an upper frame  1  and a lower frame  2  that are made of metal, a reflective sheet  3 , a resin frame  4 , a light guide plate  5 , lens sheets  6  and  7 , a backlight flexible printed circuit board (backlight FPC board)  8 , light emitting diodes (LEDs)  9 , a diffusion sheet  10 , a display panel  11  that are formed with glass substrates including liquid crystal and a thin-film transistor, a driver IC  12 , a panel flexible printed circuit board (panel FPC board)  13 , and electronic components  14  and  15 . As shown in  FIG. 2 , the LCD unit  20  is housed in an upper chassis  51  and a lower chassis  52  of a mobile phone handset, and the connector inserting portion  13   c  (see  FIG. 1 ) of the panel FPC board  13  of the LCD unit  20  is connected to a connector portion  31  of the printed circuit board  30  of the mobile phone handset. The resin frame  4  is an example of the “frame” in the claims. The backlight FPC board  8  is an example of the “first flexible printed circuit board” in the claims, and the panel FPC board  13  is an example of the “second flexible printed circuit board” in the claims. The LEDs  9  are an example of the “backlight source” in the claims. The electronic component  14  is an example of the “first electronic component” in the claims, and the electronic component  15  is an example of the “second electronic component” in the claims.  
         [0052]     As shown in  FIG. 3 , the upper frame  1  made of metal has an insertion hole  1   a , an opening  1   b , and a notch portion  1   c  at which the backlight FPC board  8  and the panel FPC board  13  are disposed. The lower frame  2  made of metal has a protruding portion  2   a  to be engaged with the insertion hole  1   a  of the upper frame  1 , and a notch portion  2   b  that is formed at the location corresponding to the notch portion  1   c  of the upper frame  1  and accommodates the backlight FPC board  8  and the panel FPC board  13 . The reflective sheet  3  to reflect light is disposed on the lower frame  2 . The reflective sheet  3  is also attached to the bottom face of the resin frame  4 , and upwardly reflects downward light. The light guide plate  5  that introduces light to the entire panel, and the lens sheets  6  and  7  that concentrate light are disposed on the resin frame  4  are arranged on the upper side of the resin frame  4  in this order from the bottom. The backlight FPC board  8  is mounted onto the lens sheet  7 . The four LEDs  9  that emit light onto the light guide plate  5  are mounted to the backlight FPC board  8 . The light emitted from the LEDs  9  to the light guide plate  5  diffuses inside the light guide plate  5 , and travels to the lens sheets  6  and  7  that are located above the light guide plate  5 . The light is concentrated by the lens sheets  6  and  7 , and is then emitted to the display panel  11  via the diffusion sheet  10  located above the lens sheets  6  and  7 .  
         [0053]     In this embodiment, the resin frame  4  has an opening  4   a  and a FPC inserting portion  4   b  to which the backlight FPC board  8  and the panel FPC board  13  are inserted, as shown in  FIGS. 3 and 4 . As shown in  FIGS. 11 and 12 , a hook-like portion  4   d  is integrally formed with the upper face  4   c  of the FPC inserting portion  4   b  of the resin frame  4 . The hook-like portion  4   d  is an example of the “uplift preventing portion” in the claims. The hook-like portion  4   d  and the upper face  4   c  of the FPC inserting portion  4   b  form an engaging space  4   f  having an inserting portion  4   e . As shown in  FIG. 5 , the hook-like portion  4   d  is engaged with the upper face of the backlight FPC board  8 , so as to restrict the height of the backlight FPC board  8  and prevent uplift of the backlight FPC board  8 . As shown in  FIGS. 4 and 5 , the backlight FPC board  8  is disposed in the engaging space  4   f  defined by the hook-like portion  4   d  and the upper face  4   c  of the resin frame  4 . The vertical length t2 of the engaging space  4   f  may be 1.2 to 2.0 times as large as the thickness t1 of the backlight FPC board  8 , for example. As the vertical length of the engaging space  4   f  of the hook-like portion  4   d  is larger than the thickness of the backlight FPC board  8 , a predetermined space in the vertical direction is left between the engaging space  4   f  and the backlight FPC board  8 . Accordingly, the backlight FPC board  8  can be easily disposed in the engaging space  4   f  formed by the upper face  4   c  of the resin frame  4  and the hook-like portion  4   d . The horizontal length d2 of the engaging space  4   f  is ⅓ to ⅔ of the width d1 of the backlight FPC board  8 . As the horizontal length d2 of the engaging space  4   f  of the hook-like portion  4   d  is smaller than the width of the backlight FPC board  8 , the backlight FPC board  8  can be easily disposed in the engaging space  4   f  formed by the upper face  4   c  of the resin frame  4  and the hook-like portion  4   d . The inserting portion  4   e  of the engaging space  4   f  opens in the direction that is perpendicular to the direction extending from the inside of the resin frame  4  to the outside of the resin frame  4 . The engaging space  4   f  is located in the vicinity of an outer edge of the resin frame  4 .  
         [0054]     In this embodiment, the backlight FPC board  8  has flexibility, and extends from the inside to the outside of the resin frame  4 , as shown in  FIG. 4 . The backlight FPC board  8  is also electrically connected to the LEDs  9 . As shown in FIG.  3 , the backlight FPC board  8  has a LED attaching portion  8   a , an external connecting portion  8   b  that extends from the inside of the resin frame  4  to the outside of the resin frame  4 , and a connector inserting portion  8   c . The four LEDs  9  are attached at predetermined intervals to the LED attaching portion  8   a  of the backlight FPC board  8 . As shown in  FIG. 17 , the connector inserting portion  8   c  of the backlight FPC board  8  is mounted in the connector portion  13   a  of the panel FPC board  13 . The external connecting portion  8   b  of the backlight FPC board  8  is designed to be greater than the linear distance between the LED attaching portion  8   a  and the connector inserting portion  8   c , so that the connector inserting portion  8   c  can be easily disposed inside the connector portion  13   a . Therefore, with the connector inserting portion  8   c  being mounted in the connector portion  13   a , the external connecting portion  8   b  of the backlight FPC board  8  is deformed and is uplifted. To counter this problem, the backlight FPC board  8  is held at the portions on which force F 2  acts. The force F 2  is caused in the vicinity of the upper frame  101  and the lower frame  102  shown in  FIGS. 30 and 31 . Thus, uplift of the external connecting portion  8   b  is prevented in this embodiment.  
         [0055]     As shown in  FIGS. 8 through 10 , the four LEDs  9  are arranged to face a side face of the light guide plate  5 , and function to emit light to the light guide plate  5 . As shown in  FIG. 3 , the diffusion sheet  10  is disposed on the backlight FPC board  8 . The diffusion sheet  10  has an adhesive layer  10   a  for bonding the diffusion sheet  10  to the display panel  11 . The display panel  11  is disposed on the diffusion sheet  10 . As shown in  FIGS. 3 and 6 , the driver IC  12  and the panel FPC board  13  are attached onto the surface of the display panel  11 . As shown in  FIG. 1 , the panel FPC board  13  extends outward via the opening that is formed by the notch portion  1   c  of the upper frame  1  and the notch portion  2   b  of the lower frame  2 .  
         [0056]     As shown in  FIG. 4 , the panel FPC board  13  is engaged with the FPC inserting portion  4   b  of the resin frame  4 , and extends outward. As shown in  FIG. 6 , the panel FPC board  13  has the connector portion  13   a . As shown in  FIGS. 7 and 16 , the connector inserting portion  8   c  of the backlight FPC board  8  is sandwiched by the connector portion  13   a , so that the backlight FPC board  8  is electrically connected to the panel FPC board  13 . As shown in  FIG. 6 , the panel FPC board  13  also has an electronic component attaching portion  13   b  to which the electronic component  14  is to be attached, a connector inserting portion  13   c , and an electronic component attaching portion  13   d  to which the electronic component  15  is to be attached. Further, a slit  13   h  is formed between the connector inserting portion  13   c  and the electronic component attaching portion  13   d  of the panel FPC board  13 , so that the connector inserting portion  13   c  and the electronic component attaching portion  13   d  can be bent independently of each other. The electronic component attaching portion  13   b  is an example of the “first electronic attaching portion” in the claims, and the electronic component attaching portion  13   d  is an example of the “second electronic attaching portion” in the claims.  
         [0057]     In this embodiment, the panel FPC board  13  further includes a bending portion  13   e  that is formed on the side of the display panel  11 , a bending portion  13   f  that is formed between the electronic component attaching portion  13   b  and the connector inserting portion  13   c , and a bending portion  13   g  that is formed between the electronic component attaching portion  13   b  and the electronic component attaching portion  13   d . A bending hole  13   i  is formed in the bending portion  13   g , so as to facilitate the bending of the bending portion  13   g . The bending portion  13   e  is an example of the “first bending portion” in the claims, the bending portion  13   f  is an example of the “second bending portion” in the claims, and the bending portion  13   g  is an example of the “third bending portion” in the claims. The bending portions  13   e ,  13   f , and  13   g  may be folded either forward or backward.  
         [0058]     Next, the procedures for assembling the LCD unit in accordance with this embodiment are described in conjunction with  FIGS. 1, 3 , and  13  through  17 .  
         [0059]     As shown in  FIG. 3 , the reflective sheet  3  is disposed below the bottom face of the lower frame  2  made of metal, and the resin frame  4  is disposed on the reflective sheet  3 . After the light guide plate  5  and the lens sheets  6  and  7  are set in the resin frame  4 , the backlight FPC board  8  on which the LEDs  9  are mounted is set in the resin frame  4 .  
         [0060]     In this embodiment, the external connecting portion  8   b  of the backlight FPC board  8  is then inserted to the inserting portion  4   e  of the engaging space  4   f  of the resin frame  4  from the direction that is perpendicular to the direction extending from the inside of the resin frame  4  to the outside of the resin frame  4 , as shown in  FIG. 13 . Accordingly, the hook-like portion  4   d  of the resin frame  4  is engaged with the upper face of the backlight FPC board  8 , so that uplift of the backlight FPC board  8  is prevented. At the time of the insertion of the backlight FPC board  8 , the top end of the connector inserting portion  8   c  of the backlight FPC board  8  and the likes can be prevented from coming into contact with the lens sheet  7  and the likes in the resin frame  4 . Accordingly, damage to the lens sheet  7  and the likes disposed in the resin frame  4  can be prevented. As shown in  FIG. 14 , the display panel  11  is then set in the resin frame  4  from the above. The driver IC  12  and the panel FPC board  13  are attached onto the surface of the display panel  11 , and the diffusion sheet  10  is bonded to the bottom surface of the display panel  11 . As a result, the structure shown in  FIG. 15  is formed. The connector inserting portion  8   c  of the backlight FPC board  8  is then inserted to the connector portion  13   a  of the panel FPC board  13 , thereby forming the structure shown in  FIG. 16 . The insertion hole  1   a  (see  FIG. 3 ) of the upper frame  1  is then engaged with the protruding portion  2   a  (see  FIG. 3 ) of the lower frame  2 . Thus, the structure shown in  FIGS. 1 and 17  is formed, and the assembling of the LCD unit  20  is completed.  
         [0061]     As described above, the resin frame  4  has the hook-like portion  4   d  for preventing uplift of the backlight FPC board  8  in this embodiment. Accordingly, the backlight FPC board  8  and the LEDs  9  can be prevented from being lifted upward due to the force F 1  (see  FIG. 17 ) generated by flexure deformation of the backlight FPC board  8 . Thus, the light emitted from the LEDs  9  can be prevented from leaking out of the resin frame  4 , and a decrease in the luminance of the display panel  11  can be avoided. Also, as the backlight FPC board  8  and the LEDs  9  are prevented from being lifted upward, the upper frame  1  can be surely engaged with the lower frame  2  at the time of assembling. Thus, the assembling workability can be increased.  
         [0062]     Further, the hook-like portion  4   d  of the resin frame  4  is integrally formed with the resin frame  4  in this embodiment. Accordingly, the number of components does not increase, even with the hook-like portion  4   d.    
         [0063]     It should be understood that the above described embodiment is merely an example in all aspects and does not limit the scope of the present invention. The scope of the present invention is shown by the claims, instead of the above described embodiment. Any modification can be made to the above described embodiment within the spirit and scope of the present invention.  
         [0064]     For example, although the present invention is applied to a LCD unit as a display in the above embodiment, it may be applied to any display other than a LCD unit.  
         [0065]     Also, the LCD unit is mounted in a mobile phone handset in the above described embodiment, but the present invention is not limited to that. It is possible to mount the LCD unit for the mobile device in a mobile information terminal such as a PDA (Personal Digital Assistant), a mobile personal computer, an electronic dictionary, a portable video game machine, or a portable navigation system, other than a mobile phone handset. It is also possible to apply the present invention to displays equipped with LCD units such as liquid crystal television sets. In such a case, the present invention can be more effectively applied to a smaller display.  
         [0066]     In the above described embodiment, the hook-like portion protruding upward from the upper face of the resin frame is employed, and the backlight FPC board is disposed in the engaging space that is formed by the upper face of the resin frame and the hook-like portion. However, the present invention is not limited to that structure. As shown in a first modification illustrated in  FIGS. 18 and 19 , a resin frame  34  may have an uplift preventing portion  34   d  with a hole-like engaging space  34   e  protruding upward from the upper face  34   c  of the resin frame  34 .  
         [0067]     Although the bending portions  13   e ,  13   f , and  13   g  of the panel FPC board  13  are shown as not being bent in the above embodiment, the present invention is not limited to that structure.  FIGS. 20 through 25  illustrate second through fourth modifications of the above embodiment of the present invention. As in the second modification illustrated in  FIGS. 20 and 21 , the bending portion  13   e  of the panel FPC board  13  of the LCD unit  20  may be bent, and the connector inserting portion  13   c  of the panel FPC board  13  extending in the bending direction may be connected to the connector portion  31   a  of the printed circuit board  30  of a mobile phone handset. In this case, the panel FPC board  13  of the LCD unit  20  may be disposed below the lower frame  2  of the LCD unit  20 . As in the third modification illustrated in  FIGS. 22 and 23 , the bending portions  13   e  and  13   f  of the panel FPC board  13  of the LCD unit  20  may be bent, but the bending portion  13   g  (see  FIG. 22 ) of the panel FPC board  13  may not be bent. In this structure, the panel FPC board  13  can be inserted to a connector portion  31   b  opposed to the connector portion  31   a  of the printed circuit board  30  of the mobile phone handset shown in  FIGS. 20 and 21 . As in the fourth modification illustrated in  FIGS. 24 and 25 , the bending portions  13   e  and  13   f  of the panel FPC board  13  of the LCD unit  20  are not bent, but only the bending portion  13   g  of the panel FPC board  13  may be bent. In this structure, the electronic components  14  and  15  can be disposed on and below the panel FPC board  13  of the LCD unit  20 . Also, as the bending portion  13   g  of the panel FPC board  13  of the LCD unit  20  is bent, the electronic component attaching portion  13   d  is disposed below the electronic component attaching portion  13   b . Accordingly, the electronic component attaching portion  13   d  does not overlap the upper portion of the printed circuit board  30  of the mobile phone handset. Thus, the area that can serve as the circuit region of the printed circuit board  30  of the mobile phone handset can be increased.