Abstract:
An electronic device for dissipating heat generated from an electronic component includes a heat dissipation tape affixed on a heat transfer path that receives transferred heat generated from the electronic component. The heat dissipation tape has at least one heat dissipation fin formed by folding back a portion of the heat dissipation tape.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present invention relates generally to an electronic device, and more particularly relates to a heat dissipation structure of heat generated from electronic components provided by the electronic device. 
         [0003]    2. Related Art 
         [0004]    With display devices such as a liquid crystal display device, a chip on film (COF) is connected to one end of the peripheral edge of the display panel. This COF has a source driver chip implemented therein that supplies drive current to the display panel for driving the display panel. Therefore, heat dissipation tape has conventionally been affixed to the back surface side of the source driver chip of the COF to dissipate heat generated from the source driver chip (for example, see Patent Document 1). 
       DOCUMENTS OF THE RELATED ART  
     Patent Documents 
       [0005]    [Patent Document 1] Publication of Japanese Unexamined Patent Application No. 2006-064939 
       SUMMARY 
       [0006]    However, in recent years, in conjunction with lowering costs and reducing the size of display devices, the number of pixel lines responsible for one source driver chip has increased thus also increasing the amount of power consumption. With this, the amount of heat generated by one source driver chip has also increased over the conventional device. Therefore, an efficient heat dissipation structure is required to dissipate the heat generated from electronic components that generate heat, such as the source driver chip, integrated circuits, and the like. 
         [0007]    One or more embodiments of the present invention provide an electronic device that may efficiently dissipate heat generated from electronic components. 
         [0008]    The electronic device according to one or more embodiments of the present invention may dissipate heat generated from an electronic component. The device may include a heat dissipation tape affixed on a heat transfer path that receives transferred heat generated from the electronic component, wherein the heat dissipation tape comprises at least one heat dissipation fin formed by folding back a portion of the heat dissipation tape. In another aspect, one or more embodiments of the present invention provide a method for dissipating heat generated from an electronic component of an electronic device, wherein the method may comprise: affixing a heat dissipation tape on a heat transfer path of the electronic component, the heat transfer path receiving the heat generated from the electronic component, and providing at least one heat dissipation fin formed by folding back a portion of the heat dissipation tape 
         [0009]    According to the configuration, for example, because the heat dissipation fin is formed by folding back a portion of the heat dissipation tape, the surface area of the heat dissipation tape may be increased. Therefore, heat generated from the electronic component may be dissipated more efficiently than when simply affixing the heat dissipation tape. 
         [0010]    In one or more embodiments, the heat dissipation tape may include a surface area on an adhering surface of the heat dissipation tape, wherein the surface area gets larger the closer the surface area is to the electronic component. 
         [0011]    According to this configuration, for example, the surface area of the heat dissipation tape may be larger in a location where there is more heat dissipated, and the heat may be intensively dissipated from such location. Therefore, heat generated from the electronic component may efficiently dissipate. 
         [0012]    For example, the shape of the heat dissipation tape on the adhering surface of the heat dissipation tape may be elliptical. 
         [0013]    According to this configuration, for example, affixing the heat dissipation tape so that the electronic component may be positioned near the center of the elliptical shape enables a larger surface area of the heat dissipation tape in a location where there is more heat dissipated. 
         [0014]    In one or more embodiments, the electronic component may be a circuit chip mounted on a wiring substrate, and the heat dissipation tape may be affixed to a position opposing the circuit chip on a surface on an opposite side of the mounting surface of the circuit chip of the wiring substrate. 
         [0015]    According to this configuration, for example, heat generated from the circuit chip may efficiently dissipate. 
         [0016]    In one or more embodiments, the heat dissipation tape may comprise a plurality of heat dissipation fins formed by a portion of the heat dissipation tape being folded back, and the plurality of heat dissipation fins may extend radially from the adhering surface of the heat dissipation tape. 
         [0017]    According to this configuration, for example, the distance from the circuit chip to each of the heat dissipation fins may be shortened. Accordingly, a greater amount of heat may be dissipated near the circuit chip. Therefore, heat generated from the circuit chip may efficiently dissipate. 
         [0018]    In one or more embodiments, the electronic device may be a display device that displays images, and the electronic device may further include a display panel that displays images, a support member that supports the display panel from a back surface side of the display panel, a frame member made of metal that covers a peripheral edge of the display panel from a front surface side of the display panel, and a wiring substrate positioned between the support member and the frame member, one end connected to a peripheral edge of the display panel, with the circuit chip mounted, wherein at least one heat dissipation fin contacts the frame member. 
         [0019]    According to this configuration, for example, the heat generated from the circuit chip may be communicated to a frame member via the heat dissipation fins. Therefore, heat generated from the circuit chip may efficiently dissipate. 
         [0020]    In one or more embodiments, the electronic component may be an integrated circuit, and the heat dissipation tape is affixed to a package surface of the integrated circuit. 
         [0021]    According to this configuration, for example, heat generated from the integrated circuit may efficiently dissipate. 
         [0022]    The electronic device according to one or more embodiments of the present invention may include an electronic device, including an electronic component, and heat dissipation tape affixed on a heat transfer path that receives transferred heat generated from the electronic component, wherein, the heat dissipation tape has a shape where the surface area on the adhering surface of the heat dissipation tape is larger and closer to the electronic component. 
         [0023]    According to this configuration, for example the surface area of the heat dissipation tape may be larger in a location where there is more heat dissipated, and the heat may be intensively dissipated from such location. Therefore, heat generated from the electronic component may efficiently dissipate. 
         [0024]    One or more embodiments of the present invention may provide an electronic device that may efficiently dissipate heat generated from electronic components. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0025]      FIG. 1  shows an external view of a display device according to one or more embodiments of the present invention. 
           [0026]      FIG. 2  shows a block diagram illustrating a main hardware configuration of the display device according to one or more embodiments of the present invention. 
           [0027]      FIGS. 3(   a )-( c ) show diagrams illustrating one example of a source driver with heat dissipation tape affixed thereto according to according to one or more embodiments of a first example. 
           [0028]      FIG. 4(   a )-( c ) show diagrams illustrating one example of a source driver with conventional heat dissipation tape affixed thereto. 
           [0029]      FIG. 5  shows a side view of the source driver with heat dissipation tape affixed thereto having one fin according to one or more embodiments of the present invention. 
           [0030]      FIG. 6  shows an exploded view of the heat dissipation tape illustrated in  FIG. 5 . 
           [0031]      FIG. 7  shows a side view of the source driver with heat dissipation tape affixed thereto having two fins according to a according to one or more embodiments of the second example. 
           [0032]      FIG. 8  shows an exploded view of the heat dissipation tape illustrated in  FIG. 7 . 
           [0033]      FIG. 9  shows a side view of the source driver with heat dissipation tape affixed thereto having three fins according to according to one or more embodiments of the second example. 
           [0034]      FIG. 10  shows an exploded view of the heat dissipation tape illustrated in  FIG. 9 . 
           [0035]      FIG. 11  shows a side view of the source driver with heat dissipation tape affixed thereto illustrated in  FIGS. 9 and 10 . 
           [0036]      FIG. 12  shows a side view of the source driver with heat dissipation tape affixed thereto illustrated in  FIG. 3 . 
           [0037]      FIG. 13  shows a cross-sectional view along the line A-A of  FIG. 1 . 
           [0038]      FIG. 14  shows a cross-sectional view along the line A-A in  FIG. 1  of a display device with conventional heat dissipation tape affixed to a source driver. 
           [0039]      FIG. 15  shows a cross-sectional view along the line A-A of  FIG. 1 . 
           [0040]      FIG. 16  shows a cross-sectional view along the line A-A of  FIG. 1 . 
           [0041]      FIG. 17(   a )-( b ) show diagrams illustrating one example of a source driver according to one or more embodiments of a fourth example. 
           [0042]      FIG. 18(   a )-( b ) show diagrams illustrating one example of a conventional source driver. 
           [0043]      FIG. 19(   a )-( l ) show diagrams illustrating one example of a heat dissipation tape. 
           [0044]      FIG. 20  shows a side view of a source driver with a source driver chip positioned on the top end of the source driver according to one or more embodiments of the present invention. 
           [0045]      FIG. 21  shows a side view of a source driver with a source driver chip positioned on the bottom end of the source driver according to one or more embodiments of the present invention. 
           [0046]      FIG. 22(   a )-( l ) show diagrams illustrating one example of a heat dissipation tape according to one or more embodiments of the present invention. 
           [0047]      FIG. 23(   a )-( b ) show diagrams for explaining a production method of the heat dissipation tape according to one or more embodiments of the present invention. 
           [0048]      FIG. 24  shows a diagram for explaining a production method of the heat dissipation tape according to one or more embodiments of the present invention. 
           [0049]      FIG. 25(   a )-( c ) show diagrams illustrating one example of a source driver with heat dissipation tape affixed thereto according to one or more embodiments of a fifth example. 
       
    
    
     DETAILED DESCRIPTION 
       [0050]    Embodiments of the present invention will be described in detail hereinafter with reference to drawings. All of the embodiments described below illustrate examples of the present invention. Numerical values, shapes, compositional elements, placement of location and mode of connection of elements, and the like, are one example and are not intended to limit the present invention. The present invention is specified according to the scope of claims. Therefore, compositional elements in the following embodiments that are not described in an independent claim are not necessarily essential to achieving the present invention but are described as a configuration of various embodiments. Moreover, the figures are schematic illustrations and are not necessarily strict representations. 
       FIRST EXAMPLE 
     &lt;Overall Configuration&gt; 
       [0051]      FIG. 1  is an external view of a display device according to one or more embodiments of a first example. Display device  100  is, for example, a liquid crystal display device, or a liquid crystal television receiver, that displays images on a display panel  102 . In the following, the width direction, height direction, and depth direction of the display device  100  are designated as the x direction, y direction, and z direction, respectively. 
         [0052]      FIG. 2  is a block diagram illustrating a main hardware configuration of the display device  100 . The display device  100  is provided with a display panel  102 , a circuit board  106 , a relay board  108 , a source driver  110 , and a gate driver  112 . 
         [0053]    The display panel  102  is a panel for displaying images and is specifically a liquid crystal panel. 
         [0054]    The circuit board  106  includes system large-scale integration (LSI)  106   a  that generates a video signal according to an image. Further, the circuit board  106  includes an interface  106   b  for externally transmitting the video signal generated by the system LSI  106   a.    
         [0055]    The relay board  108  is connected to the circuit board  106  and to the source driver  110  to relay the video signal generated by the circuit board  106  to the source driver  110 . The relay board  108  includes an interface  108   a  for receiving a video signal generated by the circuit board  106  and a timing controller  108   b  that controls the display timing of the image. 
         [0056]    The source driver  110  is a circuit that drives a source line of the display panel  102  by supplying source voltage to the source line of the display panel  102  according to a gradient value designated by the video signal relayed by the relay board  108 . The source driver  110  is configured of a COF that has a source driver chip mounted on a flexible substrate (wiring substrate having visibility). 
         [0057]    The gate driver  112  is a circuit that drives a gate line of the display panel  102 . The gate driver  112  is configured of a COF that has a gate driver chip mounted on a flexible substrate. 
         [0058]      FIG. 3  is a diagram illustrating one example of the source driver  110  having heat dissipation tape affixed thereto.  FIG. 3(   a ) is a front view of the source driver  110 , and  FIG. 3(   b ) is a side view of the source driver  110 . The source driver  110  includes copper wiring  122 , a source driver chip  121  mounted on the copper wiring  122 , and polyimide tape  123  affixed to a surface opposite the surface where the source driver chip  121  of the two surfaces of the copper wiring  122  is mounted. Further, heat dissipation tape  124 , which may be made of aluminum, is affixed in a position facing the source driver chip  121  of the polyimide tape  123 . Because an adhesive is applied to the back surface of the heat dissipation tape  124  in advance, the heat dissipation tape  124  and the polyimide tape  123  can be affixed easily. The heat dissipation tape  124  has heat dissipation fins  124   a  to  124   c.    FIG. 3(   c ) is an exploded view of the heat dissipation tape  124 . The solid line portion of the flat heat dissipation tape  124  is mountain folded, and the broken line portion is valley folded, therefore, the heat dissipation tape  124  folded in the mountain portions are bonded together to form the heat dissipation fins  124  a to  124   c  on the heat dissipation tape  124 . 
       &lt;Heat Dissipation Efficiency&gt; 
       [0059]    Next, the heat dissipation efficiency of the heat dissipation tape  124  will be described. Here, the length and height of the heat dissipation tape  124  on the adhering surface of the heat dissipation tape  124  are designated as L and H, respectively. Further, the width not including the heat dissipation fins  124   a  to  124   c  of the heat dissipation tape  124  (thickness) is designated as W.  FIG. 4  is a diagram illustrating one example of the source driver  110  having conventional heat dissipation tape affixed thereto having the same length, height, and width as the heat dissipation tape  124 .  FIG. 4(   a ) is a front view of the source driver  110 ,  FIG. 4(   b ) is a side view of the source driver  110 , and  FIG. 4(   c ) is an exploded view of the heat dissipation tape  125 . The conventional heat dissipation tape  124  is not folded, and therefore, may have the same shape as the heat dissipation tape  125  illustrated in  FIG. 4(   a ) and the heat dissipation tape  125  illustrated in  FIG. 4(   c ). 
         [0060]    Equation 1 is an equation expressing the temperature rise ΔT of the source driver chip  121 . 
         [0000]      Δ T=P /( h×A )  (Equation 1)
       ΔT: temperature rise of the source driver chip  121     P: heat loss [W] of the source driver ship  121     h: convective heat transfer coefficient [(W/m 2 ) ° C.]   A: surface area [m 2 ] of the heat dissipation tape       
 
         [0065]    It can be understood from equation 1 that the temperature rise of the source driver chip  121  gets smaller as the surface area of the heat dissipation tape gets larger. Comparing the heat dissipation tape  124  and the heat dissipation tape  125 , the heat dissipation tape  124  has a larger surface area by only the portion of the heat dissipation fins  124   a  to  124   c.  Therefore, affixing the heat dissipation tape  124  having the heat dissipation fins  124   a  to  124   c  to the polyimide tape  123  can suppress temperature rise of the source driver chip  121 . 
         [0066]    Each of the heat dissipation fins  124   a  to  124   c  have twice the heat dissipation efficiency, because of having twice the surface area, compared to heat dissipation tape with the same area as the heat dissipation fins but not having mountain folding. 
       MODIFIED EXAMPLE 
       [0067]    In the first example, there were three heat dissipation fins, but the number of heat dissipation fins is not limited to this and may be one or more. For example, heat dissipation tape  126  having one heat dissipation fin  126   a  as illustrated in  FIG. 4  may be affixed in a position facing the source driver chip  121  on the polyimide tape  123 .  FIG. 6  illustrates an exploded view of the heat dissipation tape  126  illustrated in  FIG. 5 . 
         [0068]    As described above, according to one or more embodiments of the first example, because the heat dissipation fins  124   a  to  124   c  are formed by folding back a portion of the heat dissipation tape  124 , the surface area of the heat dissipation tape  124  can be increased. Therefore, heat generated from the source driver chip  121  can be dissipated more efficiently than when simply affixing the heat dissipation tape  125 . 
       SECOND EXAMPLE  
       [0069]    In one or more embodiments of the first example, the heat dissipation tape was folded back so that a plurality of heat dissipation fins could be parallel with each other. In the second example, the heat dissipation tape is folded back so that a plurality of heat dissipation fins can extend radially from the adhering surface of the heat dissipation tape. 
       &lt;Overall Configuration&gt; 
       [0070]    Because the configuration may be the same or substantially similar as one or more embodiments of the first example with the exception of the heat dissipation tape, a detailed description will not be repeated here. 
         [0071]      FIG. 7  is a side view of a source driver  110 . A heat dissipation tape  127  having heat dissipation fins  127   a  and  127   b  is affixed in a position facing the source driver chip  121  of the polyimide tape  123 . The heat dissipation fins  127   a  and  127   b  extend radially from the position of the source driver chip  121 . 
         [0072]      FIG. 8  is an exploded view of the heat dissipation tape  127 . Valley folding a single location between the heat dissipation fin  127   a  and heat dissipation fin  127   b,  enables the heat dissipation fins  127   a  and  127   b  to extend radially from the position of the source driver chip  121 . 
         [0073]    There may be a plurality of heat dissipation fins extending radially and are not limited to two.  FIG. 9  is a side view of the source driver  110  with heat dissipation tape having three heat dissipation fins affixed. A heat dissipation tape  128  having heat dissipation fins  128   a,    128   b,  and  128   c  is affixed in a position facing the source driver chip  121  of the polyimide tape  123 . The heat dissipation fins  128   a ,  128   b,  and  128   c  extend radially from the position the source driver chip  121 . 
         [0074]      FIG. 10  is an exploded view of the heat dissipation tape  128 . Mountain folding a single location between the heat dissipation fin  128   a  and the heat dissipation fin  128   b,  and mountain folding a single location between the heat dissipation fin  128   a  and the heat dissipation fin  128   c,  enables the heat dissipation fins  128   a,    128   b,  and  128   c  to extend radially. 
       &lt;Heat Dissipation Efficiency&gt; 
       [0075]    Next, the heat dissipation efficiency of the heat dissipation tape having a heat dissipation fin radially extended therefrom will be described. 
         [0076]      FIG. 11  is a side view of the source driver  110  with the heat dissipation tape  128  illustrated in  FIG. 9  and  FIG. 10  affixed thereto.  FIG. 12  is a side view of the source driver  110  with the heat dissipation tape  124  illustrated in  FIG. 3  of the first example affixed thereto. The arrow in  FIGS. 11 and 12  indicates the transmission heat transfer path of the heat generated from the source driver chip  121 . The respective distances from the source driver chip  121  to the heat dissipation fins  128   a ˜ 128   c  are approximately equal. In contrast to this, the distance from the source driver chip  121  to the heat dissipation fin  124   a  and the distance from the source driver chip  121  to the heat dissipation fin  124   c  is longer than the distance from the source driver chip  121  to the heat dissipation fin  124   b.  Therefore, the heat can transmit faster to the heat dissipation fin  128   a  when the heat dissipation fin is arranged radially. 
         [0077]    As described above, according to one or more embodiments of the second example, the distance between the source drive chip  121  and each heat dissipation fin can be shortened. Therefore, a greater amount of heat can be dissipated near the source driver chip  121 . Therefore, the heat generated from the source driver chip  121  can efficiently dissipate. 
       THIRD EXAMPLE 
       [0078]    In one or more embodiments of the third example, an installation method in the display device  100  will be described for the heat dissipation tape having the heat dissipation fins illustrated in the first and second examples. 
         [0079]      FIG. 13  is a cross-sectional view cut along the line A-A of  FIG. 1 .  FIG. 13  illustrates only the configuration of the display device  100  near the heat dissipation tape, and the illustration for the configuration of the front cabinet, rear frame, and the like provided on the display  100  has been omitted. 
         [0080]    The display device  100  is provided with a display panel  102 , a cell guide  130 , a source driver  110 , a relay board  108 , and a bezel  132 . 
         [0081]    The display panel  102 , the source driver  110 , and the relay board  108  may be identical or substantially similar to those described in the first example. One end of the source driver  110  is connected to the display panel  102  and the other end is connected to the relay board  108 . 
         [0082]    The cell guide  130  is a support member made of resin that supports the display panel  102  from the back surface side of the display panel  102 . 
         [0083]    The bezel  132  is a frame member made of metal that covers a peripheral edge of the display panel from the front surface side of the display panel  102 . 
         [0084]    The heat dissipation fin  126   a  of the heat dissipation tape  126  illustrated in  FIG. 5  is disposed to touch the bezel  132 . Therefore, the heat generated from the source driver chip  121  can transmit through the heat dissipation fin  126   a  to the bezel  132 . 
         [0085]    Meanwhile, the conventional heat dissipation tape  125  does not provide a heat dissipation fin.  FIG. 14  is a cross-sectional view along the line A-A in  FIG. 1  of the display device  100  with the conventional heat dissipation tape  125  affixed to the source driver  110 . As illustrated in  FIG. 14 , the conventional heat dissipation tape  125  cannot come in contact with the bezel  132 . Therefore, the heat generated from the source driver chip  121  cannot be transmitted to the bezel  132 . 
         [0086]    As described above, according to one or more embodiments of the third example, the heat generated from source driver chip  121  can be transmitted to the metal bezel  132  made of metal through the heat dissipation tape  126   a.  Therefore, the heat generated from source driver chip  121  can efficiently dissipate. 
         [0087]    Also, the heat generated from the source driver chip  121  can be transmitted to the metal bezel  132  through the heat dissipation fin  126   a  regardless of the shape of the metal bezel  132 .  FIG. 15  and  FIG. 16  are cross-sectional views along the line A-A of  FIG. 1 . For example, as illustrated in  FIG. 15 , when the bezel  132  has a shape that projects toward the display panel  102 , making the heat dissipation fin  126   a  contact the position where the bezel  132  projects enables the heat generated from the source driver chip  121  to be transmitted to the metal bezel  132 . Further, as illustrated in  FIG. 16 , lengthening the length of the heat dissipation fin  126   a  allows the heat dissipation fin  126   a  to contact the bezel  132  even if the bezel  132  has a shape that projects in a direction away from the display panel  102 . Therefore, the heat generated from the source driver chip  121  can be transmitted to the metal bezel  132 . 
       FOURTH EXAMPLE 
       [0088]    One or more embodiments of the fourth example differ from one or more embodiments of the first to third examples in that the shape on the adhering side of the heat dissipation tape is not rectangular. There is also no heat dissipation fin on the heat dissipation tape in one or more embodiments of the fourth example. 
       &lt;Overall Configuration&gt; 
       [0089]    Because the configuration may be the same or substantially similar as the first example with the exception of the heat dissipation tape, a detailed description will not be repeated here. 
         [0090]      FIG. 17  is a diagram illustrating one example of the source driver  110 .  FIG. 17(   a ) is a front view of the source driver  110 , and  FIG. 17(   b ) is a side view of the source driver  110 . A heat dissipation tape  129  is affixed in a position facing the source driver chip  121  of the polyimide tape  123 . The heat dissipation tape  129  has a hexagonal shape with the top right and top left corners trimmed 
       &lt;Heat Dissipation Efficiency&gt; 
       [0091]    Next, the heat dissipation efficiency of the heat dissipation tape  129  will be described. For comparison, an example of a conventional source driver  110  is illustrated in  FIG. 18 .  FIG. 18(   a ) is a front view of the source driver  110 , and  FIG. 18(   b ) is a side view of the source driver  110 . A heat dissipation tape  125  is affixed in a position facing the source driver chip  121  of the polyimide tape  123 . The shape of the heat dissipation tape  125  is rectangular. Furthermore, the area of the heat dissipation tape  125  and the heat dissipation tape  129  may be the same. 
         [0092]    The source driver chip  121  is a heat source. Therefore, the temperature of the source driver  110  is higher the closer it is to the source driver chip  121  and is lower the further away it is from the source driver  121 . The heat dissipation tape  129  illustrated in  FIG. 17  has a shape that has a larger surface area on the adhering side of the heat dissipation tape  129  the closer it is to the source driver chip  121 . Specifically, the width in the vertical direction of the heat dissipation tape  129  is narrower the farther away in the horizontal direction it is from the center of the source driver chip  121 . In contrast to this, the heat dissipation tape  125  illustrated in  FIG. 18  has a portion closer to and a portion farther away from the source driver chip  121 , and the surface area on the adhering side of the heat dissipation tape  125  may be the same. Specifically, the width in the vertical direction of the heat dissipation tape  125  is fixed even when farther away in the horizontal direction from the center of the source driver chip  121 . 
         [0093]    Even with the same surface area in this manner, the heat dissipation tape  129  can be affixed to a portion with a higher temperature compared to the heat dissipation tape  125 . Therefore, the heat generated from the source driver chip  121  can be effectively dissipated. 
       &lt;Other Shapes of Heat Dissipation Tape  129 &gt; 
       [0094]    The shape of the heat dissipation tap  129  is not limited to a hexagon as illustrated in  FIG. 17 . For example, the shape may be such as that illustrated in  FIG. 19(   a )-( l ). What these have in common is that they have a shape in which the surface areas on the adhering side of heat dissipation tape  129  gets larger the closer it is to the source driver chip  121 . That is to say, the farther away heat dissipation tape  129  is in the horizontal direction from the center of the source driver chip  121 , the narrower it is in the vertical direction. For example, as illustrated in  FIG. 19(   b ), the shape of the heat dissipation tape  129  may be an ellipse having long sides in the length direction of the source driver chip  121 . 
         [0095]    All of the shapes of the heat dissipation tape  129  illustrated in  FIG. 19  have vertical symmetry. However, vertical symmetry is not necessarily required.  FIG. 20  is a side view of the source driver  110  in which the source driver chip  121  is positioned on the upper end of the source driver  110 , and  FIG. 21  is a side view of the source driver  110  in which the source driver chip  121  is positioned on the lower end of the source driver  110 . Whether the source driver chip  121  is positioned on the upper end or positioned on the lower end of the source driver  110 , sufficient space on the upper side or lower side of the source driver chip  121  cannot be assured. Therefore, the heat dissipation tape  129  having vertical symmetry may not be able to be affixed in a position facing the source driver chip  121 . In these cases, the heat dissipation tape  129  having vertical asymmetry can be affixed. For example, when the source driver chip  121  is in a position illustrated in  FIG. 21 , sufficient space on the lower side of the source driver chip  121  cannot be assured. Therefore, the heat dissipation tape  129  with a shape such as that illustrated in  FIG. 22(   a )-( l ) may be affixed in a position facing the source driver chip  121 . Heat dissipation tapes  129  such as these have a shape with a lower portion of the heat dissipation tapes  129  illustrated in  FIG. 19(   a )-( l ) trimmed. The heat dissipation tapes  129  illustrated in  FIG. 22  also have a shape that has a larger surface area on the adhering side of the heat dissipation tape  129  the closer it is to the source driver chip  121 . That is to say, the farther away these heat dissipation tapes  129  are in the horizontal direction from the center of the source driver chip  121 , the narrower they are in the vertical direction. 
       &lt;Production Method of Heat Dissipation Tape  129 &gt; 
       [0096]    Next, a production method of the heat dissipation tape  129  will be described.  FIG. 23  is a diagram for describing a production method of the heat dissipation tape  129  illustrated in  FIG. 19(   d ). The heat dissipation tape  129  illustrated in  FIG. 23(   b ) is produced by trimming the four corners of the conventional rectangular shaped heat dissipation tape  125  illustrated in  FIG. 23(   a ). If the trimmed portion does not contribute much to the heat dissipation of the source driver chip  121 , a single heat dissipation tape or as many as the conventional number of heat dissipation tapes may be created. 
         [0097]    As illustrated in  FIG. 24 , more heat dissipation tapes  129  may be created by trimming a plurality heat dissipation tapes  129  which are arrayed in a staggered pattern from one heat dissipation tape  135 , compared to when trimming the four corners of a rectangular heat dissipation tape. 
         [0098]    As described above, according to one or more embodiments of the fourth example, the surface area of the heat dissipation tape  129  can be larger in a location where there is more heat dissipated, and the heat can be intensively dissipated from such location. Therefore, the heat generated from source driver chip  121  can efficiently dissipate. 
       FIFTH EXAMPLE 
       [0099]    In one or more embodiments of the first to third examples, heat dissipation tapes having a heat dissipation fin are described. In one or more embodiments of the fourth example, a description is given of a heat dissipation tape having a shape that has a larger surface area on the adhering side the closer it is to the source driver chip  121 . In one or more embodiments of the fifth example, a heat dissipation tape with both of these attributes will be described. 
       &lt;Overall Configuration&gt; 
       [0100]    Because one or more embodiments of the fifth example may be the same as one or more embodiments of the first example with the exception of the heat dissipation tape, a detailed description will not be repeated here. 
         [0101]      FIG. 25  is a diagram illustrating one example of the source driver  110  having heat dissipation tape affixed thereto.  FIG. 25(   a ) is a front view of the source driver  110 , and  FIG. 25(   b ) is a side view of the source driver  110 . A heat dissipation tape  133  is affixed in a position facing the source driver chip  121  on the polyimide tape  123 . The heat dissipation tape  133  illustrated in  FIG. 25(   a ) has a shape in which the surface area on the adhering side of the heat dissipation tape  133  gets larger the closer it is to the source driver chip  121 , such as, an elliptical shape. That is to say, the farther away the heat dissipation tape  133  is in the horizontal direction from the center of the source driver chip  121 , the narrower it is in the vertical direction. The heat dissipation tape  133  has heat dissipation fins  133   a  to  133   c.    FIG. 25(   c ) is an exploded view of the heat dissipation tape  133 . The solid line portion of the flat heat dissipation tape  133  is mountain folded, and the broken line portion is valley folded, therefore, the heat dissipation tape  133  folded in the mountain portions are bonded together to form the heat dissipation fins  133   a  to  133   c.    
         [0102]    As described above, according to one or more embodiments of the fifth example, because the heat dissipation fins  133   a  to  133   c  are formed by folding back a portion of the heat dissipation tape  133 , the surface area of the heat dissipation tape  133  can be increased. Therefore, heat generated from the source driver chip  121  can be dissipated more efficiently than when simply affixing the heat dissipation tape. 
         [0103]    Further, the surface area of the heat dissipation tape  133  may be larger in a location where there is more heat dissipated, and the heat can be intensively dissipated from such location. Therefore, the heat generated from source driver chip  121  can efficiently dissipate. 
         [0104]    Descriptions were given above for the display device according to embodiments of the present invention, but the present invention is not limited to the embodiments described above. 
         [0105]    For example, in one or more embodiments of the fifth example, the shape of the adhering side of the heat dissipation tape  133  was an ellipse, but it is not limited to an ellipse. For example, it may be a shape such as that illustrated in  FIG. 17 ,  FIG. 19 , or  FIG. 22 . 
         [0106]    Further, the heat dissipation tape may be affixed to something other than the COF. For example, it may be affixed on the package of the system LSI  106   a  illustrated in  FIG. 2 , or it may be affixed on a power transistor. Further, the heat dissipation tape may also be affixed on a metallic heat sink or the like. 
         [0107]    Moreover, the material of the heat dissipation tape is not limited to aluminum, and it may be a metal with high thermal conductivity, such as copper or silver. Also, the heat dissipation tape may be made of silicone rubber for heat dissipation. 
         [0108]    Further, the display device is not limited to a liquid crystal display device or a liquid crystal television receiver, but may also be an organic electro luminescence (EL) display device, an organic EL television receiver, or the like. 
         [0109]    Targeted use of heat dissipation tape is not limited to a display device. The heat dissipation tapes described in the above embodiments may be used to dissipate heat from electronic devices such as video recorders, lighting equipment, or any electronic device that uses electronic components. 
         [0110]    In addition, the embodiments and the modified examples above may be respectively combined. 
         [0111]    An electronic device according to one or more embodiments of the present invention can be applied to, for example, a liquid crystal display device or a liquid crystal television receiver for displaying images. 
         [0112]    Although the disclosure has been described with respect to only a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that various other embodiments may be devised without departing from the scope of the present invention. Accordingly, the scope of the invention should be limited only by the attached claims. 
       DESCRIPTION OF THE NUMERICAL REFERENCES 
       [0113]      100  Display device 
         [0114]      102  Display panel 
         [0115]      106  Circuit board 
         [0116]      106   a  System LSI 
         [0117]      106   b,    108   a  Interface 
         [0118]      108  Relay board 
         [0119]      108   b  Timing controller 
         [0120]      110  Source driver 
         [0121]      112  Gate driver 
         [0122]      121  Source driver chip 
         [0123]      122  Copper wiring 
         [0124]      123  Polyimide tape 
         [0125]      124 ,  125 ,  126 ,  127 ,  128 ,  129 ,  133 ,  135  Heat dissipation tape 
         [0126]      124   a  to  124   c,    126   a,    1277   a,    127   b,    128   a  to  128   c,    133   a  to  133   c  Heat dissipation fin 
         [0127]      130  Cell guide 
         [0128]      1322  Bezel