FIELD 
       [0001]    The subject matter herein generally relates to illumination of portable electrical terminal. 
       BACKGROUND 
       [0002]    Portable electrical terminals, such as mobile phones and tablet computers, are very popular. A portable electrical terminal can have decorative light for improving the appearance and warning users about calls and messages. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0003]    Implementations of the present technology will now be described, by way of example only, with reference to the attached figures. 
           [0004]      FIG. 1  is an exploded, isometric view of an embodiment of a portable electrical terminal. 
           [0005]      FIG. 2  is an isometric view of a separated main body and back cover of the portable electrical terminal of  FIG. 1 . 
           [0006]      FIG. 3  is an isometric view of a light guide frame of the portable electrical terminal of  FIG. 1 . 
           [0007]      FIG. 4  is an isometric view of the light guide frame of the portable electrical terminal of  FIG. 1  from another perspective. 
           [0008]      FIG. 5  is an isometric view of a light guide pipe of the portable electrical terminal of  FIG. 1 . 
       
    
    
     DETAILED DESCRIPTION 
       [0009]    It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts have been exaggerated to better illustrate details and features of the present disclosure. 
         [0010]    Several definitions that apply throughout this disclosure will now be presented. 
         [0011]    The term “outside” refers to a region that is beyond the outermost confines of a physical object. The term “substantially” is defined to be essentially conforming to the particular dimension, shape, other feature that the term modifies, such that the component need not be exact. For example, “substantially cylindrical” means that the object resembles a cylinder, but can have one or more deviations from a true cylinder. The term “comprising, ” when utilized, means “including, but not necessarily limited to” ; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like. 
         [0012]    The present disclosure describes a portable electrical terminal. 
         [0013]      FIG. 1  illustrates a first embodiment of a portable electrical terminal  100 . The portable electrical terminal  100  can include a main body  10  and a back shell  20  positioned on the main body  10 . The main body  10  can include a light source portion  121 . The back shell  20  can include a light guide frame  21 , a light guide plate  22 , and a light guide pipe  23 . The light guide frame  21  can include a first housing portion  212  and a second housing portion  2141  respectively located on opposite sides of the light guide frame  21 . The first housing portion  212  can receive the light guide plate  22  and other card-shaped objects  30 . The second housing portion  2141  can receive the light guide pipe  23 . The light guide pipe  23  can include two light incident portions  235  and a plurality of light-emitting portions  234  on an interior side-surface (not labeled) of the light guide pipe  23 . The two light incident portions  235  can be received in, and optically couple with, the light source portion  121 . 
         [0014]    As described above, the back shell  20  can be positioned on the main body  10  of the portable electrical terminal  100 . Although the housing portion  212  and the light guide pipe  23  can be positioned in the main body  10 , the portable electrical terminal  100  can emit light and can receive the card-shaped objects  30  such as bank cards and pictures for the benefit of users. In addition, the light guide plate  22  can be positioned upon the card-shaped objects  30 , and the card-shaped objects  30  can have a uniform luminous effect. 
         [0015]    The back shell  20  can further include a outmost back cover  24 , and a reflective sheet  25 . 
         [0016]      FIG. 2  illustrates that the main body  10  can further include a display screen  11 , and a back surface  12  opposite to the display screen  11 . The light source portion  121  can be positioned on the back surface  12  and be configured to emit light to the outside of the main body  10 . The light source is not shown. The light source portion  121  can be a groove. The back shell  20  can be positioned on the back surface  12  of the main body  10 . The back shell  20  and the main body  10  have the same shape. 
         [0017]    The back cover  24  can be a rectangular plate, and can include a shading portion  241 , a light transmitting portion  242  circled by the shading portion  241 , and a shaft portion  243  located at a side of the back cover  24 . The shading portion  241  can be formed at the periphery of the back cover  24  by means of composite forming, film pasting, printing, or other process. The shaft portion  243  can be rotatably connected to the light guide frame  21  (shown in  FIG. 1 ). 
         [0018]      FIG. 3  illustrates that the light guide frame  21  can be a rectangular frame, and can further include a first upper surface  211  and a first lower surface  214  opposite to the first upper surface  211 . The first housing portion  212  can be positioned on the center of the first upper surface  211 . The first upper surface  211  can further include a connecting portion  213  located at one edge of the first upper surface  211 . The first housing portion  212  can be a rectangle, and can include a bottom surface  2121 , a plurality of sidewalls  2122  vertically extending from sides of the bottom surface  2121 , and at least one light transmitting hole  2123  defined in the plurality of sidewalls  2122 . The light transmitting holes  2123 , if more than one, can be spaced from each other. The shape of the light transmitting holes  2123  can be rectangular or circular. The connecting portion  213  can be rotatably connected with the shaft portion  243  (shown in  FIG. 2 ). 
         [0019]      FIG. 4  illustrates that the second housing portion  2141  can be positioned on and located at the periphery of the lower surface  214 . The second housing portion  2141  can circle the first housing portion  212 , and can be in communication with the first housing portion  212  by the light transmitting holes  2123  (shown in  FIG. 3 ). The inner surface (not labeled) of the second housing portion  2141  can be coated with a high-reflection layer (not labeled) for reducing light loss. The reflectivity of the coating layer is above 0.9. 
         [0020]      FIG. 5  illustrates that the light guide pipe  23  can be a bar-shaped frame with an opening (not labeled). The light guide pipe  23  can further include a second upper surface  231 , a second lower surface  232  opposite to the second upper surface  231 , and an interior side-surface  233  connected with the second upper surface  231  and second lower surface  232 . The reflective sheet  25  (shown in  FIG. 1 ) can be attached to the second lower surface  232  for reducing the light loss of the light guide  23 . The light-emitting portions  234  can be spaced from each other on the interior side-surface  233  of the light guide pipe  23 , and can correspond to the light-emitting holes  2123 . The light entering into the light guide pipe  23  can be uniformly dispersed on the each light-emitting portion  234  by, for example, micro-lenses (not shown) positioned on the light-emitting portions  234 , or increasing the surface roughness of the light-emitting portions  234 . The two light incident portions  235  can be defined by perpendicular extensions from two ends of the opening (not labeled). Each of light incident portions  235  can include a light incident surface  2351  parallel to the second lower surface  232 . The two light incident portions  235  can be received in, and optically coupled with, the light source portion  121  (shown in  FIG. 2 ). 
         [0021]    In assembly, the light guide pipe  23  can be received in the second housing portion  2141 , and the light-emitting portions  234  installed to correspond with the light-emitting holes  2123  of the light guide frame  21 . The reflective sheet  25  can be positioned upon the second lower surface  232 . Then the card-shaped objects  30  can be received in the first housing portion  213 , and the light guide plate  22  can be stacked upon the card-shaped objects  30 . Then the shaft portion  243  of the back cover  24  can be rotatably connected with the connecting portion  213  of the light guide frame  21 . Finally, the light incident portion  235  of the back shell  20  can be received in and optically coupled with the light source portion  121  of the main body  10 . 
         [0022]    To examine a new card-shaped object  30 , the back cover  24  can be opened, and the light guide plate  22  can be taken out from the first housing portion  212 . Then the old card-shaped object  30  can be taken out from the first housing portion  212 , and the new other card-shaped object  30  can be received in the first housing portion  212 . The light guide plate  22  is placed over the new card-shaped object  30 , and the back cover  24  can cover the light guide frame  21 . 
         [0023]    In use, the light from the light source  121  of the main body  10  can be transmitted into the light guide pipe  23  through the light incident surface  2351  of the light incident portion  235 , and the light entering into the light guide pipe  23  can be transmitted into the first housing portion  212  through the light-emitting portions  234  and the light-emitting holes  2123 . The light entering into the first housing portion  212  can be uniformly dispersed in the first housing portion  212  by the light guide plate  22  , and a card-shaped object  30  can have a uniform luminous effect. Finally, the light transmitting potion  242  of the back cover  24  provides lighting from the first housing portion  212  to the outside environment. 
         [0024]    In other embodiment, transparent card-shaped objects  30  can also be internally illuminated by the light guide plate  22 . 
         [0025]    The embodiments shown and described above are only examples. Many details are often found in the art such as the other features of a portable electrical terminal. Therefore, many such details are neither shown nor described. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, especially in matters of shape, size and arrangement of the parts within the principles of the present disclosure up to, and including the full extent established by the broad general meaning of the terms used in the claims. It will therefore be appreciated that the embodiments described above may be modified within the scope of the claims.
A portable electrical terminal with inward illumination includes a main body and a back shell positioned on the main body. A light source portion is arranged on the main body. The back cover includes a light guide frame, a light guide plate and a light guide pipe. A first housing portion and a second housing portion are respectively located on opposite sides of the light guide frame. The light guide plate and card-shaped object can be received in the first housing portion. The light guide pipe is received in the second housing portion. The portable electrical terminal emits light for decoration and for close examination of the card-shaped object within the back shell arranged on the main body.