Patent Publication Number: US-10767810-B2

Title: Electronic device holder

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a divisional application of U.S. application Ser. No. 16/038,943, filed Jul. 18, 2018 (now U.S. Publication No. 2019/0186685), which is based upon and claims the benefit of priority from Japanese Patent Application No. 2017-241772, filed Dec. 18, 2017, the entire contents of which are incorporated herein by reference. 
    
    
     FIELD 
     Embodiments described herein relate generally to a holder that attaches an electronic device to a display. 
     BACKGROUND 
     A small-sized electronic device such as a personal computer (hereinafter referred to as a PC) may be attached to a display. On the backside of the display, a mount that attaches a stand or supporting column thereto is provided. It is difficult to directly attach the PC to the display, and hence a holder to which the PC is attached or in which the PC is stored may be attached to the mount. In general, the number of types of interface ports for electrical connection of a small-sized PC to an external device is small, and hence a port expansion adaptor that expands the types of interfaces may be electrically connected to a small-sized PC. However, there is no useful means for collectively attaching these devices to the display. 
     A conventional holder that attaches an electronic device such as a PC or the like to the display cannot collectively attach another electronic device required to use the small-sized PC such as a port expansion adaptor or the like in addition to the electronic device such as the small-sized PC. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A general architecture that implements the various features of the embodiments will now be described with reference to the drawings. The drawings and the associated descriptions are provided to illustrate the embodiments and not to limit the scope of the invention. 
         FIG. 1  is an exploded perspective view showing an example of a holder attaching a mobile PC and adaptor to a display according to a first embodiment. 
         FIG. 2  is a front view showing an example of the holder. 
         FIG. 3  is a side view showing an example of the holder. 
         FIG. 4  is a perspective view showing an example of the holder. 
         FIG. 5  is an exploded perspective view showing an example of a holder attaching a mobile PC and adaptor to a display according to a second embodiment. 
         FIG. 6  is a rear view of an example of a first holder section to which the mobile PC is to be attached viewed from the display side. 
         FIG. 7  is a side view of an example of the first holder section. 
         FIG. 8  is a perspective view of an example of the first holder section attached to a second holder section viewed from the display side. 
         FIG. 9  is a perspective view showing an example of the holder according to the second embodiment. 
         FIG. 10  is an exploded perspective view showing an example of the holder of the second embodiment attached to a display including a recessed-type VESA mount as an example of application. 
     
    
    
     DETAILED DESCRIPTION 
     Various embodiments will be described hereinafter with reference to the accompanying drawings. The disclosure is merely an example and is not limited by contents described in the embodiments described below. Modification which is easily conceivable by a person of ordinary skill in the art comes within the scope of the disclosure as a matter of course. In order to make the description clearer, the sizes, shapes and the like of the respective portions may be changed and illustrated schematically in the drawings as compared with those in an accurate representation. Constituent elements corresponding to each other in a plurality of drawings are denoted by like reference numerals and their detailed descriptions may be omitted unless necessary. 
     In general, according to one embodiment, a holder attaches a first electronic device and a second electronic device to a display. The holder includes: 
     a base structure comprising a base plate, the base plate comprising a group of through holes that receives a group of male screws to be screwed into a group of female screws of the display; 
     a first holder section at a first portion of the base structure, the first holder section holding the second electronic device and comprising a first through hole that receives a first male screw to be screwed into a first female screw of the first electronic device; and 
     a second holder section at a second portion of the base structure, the second holder section holding the second electronic device and comprising a second through hole that receives a second male screw to be screwed into a second female screw of the first electronic device. 
     Examples of an electronic device to be attached to a display by using a holder according to an embodiment may include a small-sized portable mobile PC. The small-sized portable mobile PC may not include a display or a hardware keyboard in order to enhance downsizing and portability and/or flexibility in use by the user. When the mobile PC is used together with a wearable device or when the mobile PC is used as a wearable device, a hardware keyboard is unnecessary. When the mobile PC is used by being electrically connected to a wearable device of an eyeglass type or a head mount type, a display is unnecessary. When a hardware keyboard and a display are electrically connected to the mobile PC, the mobile PC is used as a desktop PC. In this case, when the mobile PC is attached to the backside of the display, a space-saving desktop PC is realized. The keyboard is not limited to the hardware keyboard, and a software keyboard displayed on a screen of the display may also be used. 
     Interfaces for external electrical connection of the mobile PC are limited due to demands for downsizing or the like. For example, the mobile PC is provided with a USB type-C (registered trade mark) connector, but may not be provided with an HDMI (registered trade mark) connector or a wired LAN connector. It is possible to electrically connect a port expansion adaptor provided with an HDMI connector, a wired LAN connector and the like to the USB type-C connector of the mobile PC, transmit a video signal from the mobile PC to the port expansion adaptor through a USB type-C cable, and then transmit the video signal from the HDMI connector of the port expansion adaptor to the display. When not only the mobile PC but also the port expansion adaptor is attached to the backside of the display, a further space-saving desktop PC with better operability is realized. 
     Although the electronic device is not limited to the small-sized mobile PC, here an embodiment of a holder that attaches the mobile PC and the port expansion adaptor to the display will be described as an example. 
     First Embodiment 
     A holder according to a first embodiment will be described with reference to  FIG. 1  to  FIG. 4 .  FIG. 1  is an exploded perspective view showing an example of the holder attaching the mobile PC and the port expansion adaptor to the display according to the first embodiment.  FIG. 2  is a front view showing an example of the holder.  FIG. 3  is a side view showing an example of the holder.  FIG. 4  is a perspective view showing an example of the holder. 
     As shown in  FIG. 1 , a holder  10  is fixed to a backside  13  of a display  12  with four male screws  15 . A mobile PC  100  and a port expansion adaptor  102  are attached to the holder  10 . A front  17  of the display  12  is a display surface that displays an image. The lateral direction of the display  12  is the X direction, the longitudinal direction of the display  12  is the Y direction, and depth direction of the display  12  is the Z direction. Although the display  12  is, for example, a liquid crystal display device, the display  12  is not limited to this, and may be an organic EL display or the like. 
     The external appearance of the mobile PC  100  is a thin rectangular parallelepiped shape with a width of about 10 cm or less, height of about 20 cm or less, and thickness of about 2 cm or less, and a weight thereof is about 300 g or less. Accordingly, the mobile PC  100  can be held in a pocket of the work clothing, holster to be attached to a belt or a shoulder case, whereby the PC  100  is portable. 
     Although the mobile PC  100  incorporates therein semiconductor chips such as the CPU, semiconductor memory, and the like, and storage devices such as a Solid State Drive (SSD), and the like, the mobile PC  100  is not provided with a display and a hardware keyboard. A fingerprint sensor  108  is provided at a central portion of the front of mobile PC  100 . The fingerprint sensor  108  is used for user authentication at the time of login of the mobile PC  100 . Between the fingerprint sensor  108  and one end of the mobile PC  100  in the longitudinal direction thereof, five buttons  106  are provided. The five buttons  106  include a decision button arranged at the center and four buttons arranged above and below and on either side of the decision button. The five buttons  106  are used to input a command or the like when a hardware keyboard is not electrically connected to the mobile PC  100 . It should be noted that the five buttons  106  may be allocated to numeric characters to input a password, and user authentication at the time of login may thereby be carried out, this enabling omission of the fingerprint sensor  108 . Although not shown, the power for the mobile PC  100  may be supplied from an AC adaptor or may be supplied from an internal rechargeable battery. 
     Although not shown, two female screws are formed in the backside of the mobile PC  100  at two positions, and two male screws  40  are screwed into the female screws through the holder  10 , whereby the mobile PC  100  is fixed to the holder  10 . Accordingly, the holder  10  is provided with two through holes  42  and  48  into which the two male screws  40  are inserted. The mobile PC  100  is attached to the holder  10  in such a direction that the five buttons  106  are positioned above. The attaching direction of the holder  10  will be described later with reference to  FIG. 2  and  FIG. 3 . A USB type-C connector  112  is provided in a side face of one end portion of the mobile PC  100  in the longitudinal direction thereof closer to the five buttons  106 . 
     Although details will be described with reference to  FIG. 2  and  FIG. 3 , the holder  10  includes an adaptor storage space that stores therein the port expansion adaptor  102 , and one end of the adaptor storage space is opened, thereby forming an insertion opening. The port expansion adaptor  102  is inserted into the adaptor storage space through the insertion opening or is drawn out of the adaptor storage space through the insertion opening. A USB type-C cable  104  is led out of one end of the port expansion adaptor  102 . The holder  100  stores therein the port expansion adaptor  102  is attached to the display in such a manner that the USB type-C cable  104  is positioned above. As shown in  FIG. 4 , a connector at a distal end of the USB type-C cable  104  is connected to the USB type-C connector  112  of the mobile PC  100 . In the side face (left side face in  FIG. 1 ) of the port expansion adaptor  102  when viewed from the display backside in the case where the port expansion adaptor  102  is attached to the display  12  in a state in which the port expansion adaptor  102  is stored in the holder  10 , an HDMI connector  114 , USB3.0 (registered trade mark) connector, wired LAN connector, and the like are provided. The HDMI connector  114  is electrically connected to an HDMI connector  118  provided in the backside of the display  12  through an HDMI cable  116 . 
     A VESA mount section  29  in which a screw hole diameter, a screw pitch, withstand load, size of a fixing surface, and the like are specified by the Video Electronics Standards Association (VESA) standard is provided in the backside of the display  12 . In the VESA standard, there are two sizes associated with screw arrangement. Female screws are formed at positions corresponding to four corners of a square, and the size of the square includes a first size of 100 mm×100 mm, and a second size of 75 mm×75 mm. A center of the square of the first size and a center of the square of the second size are coincident with each other. Although it is sufficient if the VESA mount section  29  supports one type of size, there is a VESA mount section in which two types of female screws are formed in order to support the two types of sizes.  FIG. 1  shows an example in which four female screws  30  provided at positions corresponding to the four corners of the square of 100 mm×100 mm, and four female screws  32  provided at positions corresponding to the four corners of the square of 75 mm×75 mm are formed. The VESA mount section  29  has the two types of sizes, and hence when the holder  10  is configured in such a manner as to support both the sizes, through holes  26  are also formed at four positions of the holder  10  corresponding to the four female screws  30  of the VESA mount section  29 , and through holes  28  are formed at four positions corresponding to the four female screws  32 . 
     The mobile PC  100  is fixed to the holder  10  with the two male screws  40 . The holder  10  is fixed to the VESA mount section  29  with four male screws  15 . Although  FIG. 1  shows an example in which the male screws  15  are screwed into the female screws  30  of the first size, the male screws  15  may be screwed into the female screws  32  of the second size. 
     The holder  10  is fixed to the backside of the display  12  and, thereafter the port expansion adaptor  102  is inserted from above into the adaptor storage space of the holder  10  as indicated by an arrow of  FIG. 1 . Thereby, the mobile PC  100  and port expansion adaptor  102  are attached to the display  12  by using the holder  10 . Moreover, the port expansion adaptor  102  is detachably attached. 
     Details of the holder  10  will be described below with reference to  FIG. 2  and  FIG. 3 . The holder  10  is formed of a base plate  14 , an upper holding section  16 , and a lower holding section  18  which are formed of a resin or the like and integral with each other as one body. The space surrounded with the base plate  14 , the upper holding section  16 , and the lower holding section  18  is the adaptor storage space that stores therein the port expansion adaptor  102 . The upper holding section  16  forms a releasing section, and the port expansion adaptor  102  is inserted into the adaptor storage space through the releasing section, or is drawn out of the adaptor storage space through the releasing section. The surface of the holder  10  or base plate  14  on the display  12  side is referred to as a backside, and the surface on the opposite side thereof is referred to as a front or front surface. 
     The base plate  14  has an approximately flat plate-like shape, and includes a projection portion  20  a front edge of which is formed into a semicircular shape at each of four corners of the base plate  14 , i.e., right and left corners on the upper and lower sides. An upper edge  22  of the base plate  14  is aligned with an upper end of each of the projection portions  20  on both the upper right and left sides, and a lower edge  24  of the base plate  14  is linearly continuous with a lower end of each of the projection portions  20  on both the lower right and left sides. 
     In each of the projection portions  20  of the base plate  14 , each of the four through holes  26  and  28  are provided. The four male screws  15  to be screwed into the four female screws  30  or  32  of the VESA mount section  29  are passed through the through holes  26  or  28 . More specifically, the four through holes  26  are arranged at four corners of the square of 100 mm×100 mm, and the four through holes  28  are arranged at four corners of the square of 75 mm×75 mm. 
     As shown in  FIG. 2 , at an approximately central portion in the vertical direction of a base plate central portion  19 , two guide plates  34  slightly protruding from the base plate  14  are provided separately from each other. The two guide plates  34  are provided with an interval corresponding to the width of the port expansion adaptor  102  held between them, and are provided to support the port expansion adaptor  102  at both sides thereof, and smoothly carry out attachment/detachment of the port expansion adaptor  102 . 
     The upper holding section  16  is provided with a pair of supporting guides  36  forwardly protruding from both the right and left sides of the upper portion of the base plate  14 , and flat-plate-like coupling plate  38  that couples the right and left supporting guides  36  to each other. The supporting guides  36  are approximately perpendicular to the base plate  14 , and the coupling plate  38  is approximately parallel to the base plate  14 . The supporting guides  36  and the coupling plate  38  may be formed integral with each other. As indicated by an arrow in  FIG. 1 , the port expansion adaptor  102  can be inserted into the holder  10  through the insertion opening formed by the base plate  14 , the supporting guides  36 , and the coupling plate  38  or to be drawn out of the holder  10  through the insertion opening. The size of the insertion opening is determined such that there is somewhat room inside relative to the cross-sectional size of the port expansion adaptor  102 . In the coupling plate  38  of the upper holding section  16 , a through hole  42  used to pass the male screw  40  to be screwed into the female screw provided in the mobile PC  100  is provided. 
     The lower holding section  18  is provided with a bottom plate  44  forwardly protruding from a lower portion of the base plate  14 , and a front plate  46  rising from the bottom plate  44  and upwardly extending toward the upper portion of the base plate  14  approximately in parallel with the base plate  14 . The base plate  14 , the bottom plate  44 , and the front plate  46  constitute the adaptor storage space that longitudinally stores therein the port expansion adaptor  102 . The lower end of the port expansion adaptor  102  inserted through the insertion opening of the upper holding section  16  is received by the bottom plate  44 . 
     In the upper portion of the front plate  46 , a through hole  48  that passes the male screw  40  (see  FIG. 1 ) to be screwed into the female screw provided in the mobile PC  100  is provided. The through hole  48  is provided at the center of a screw section  49 . The distance between the through hole  42  provided in the coupling plate  38  and through hole  48  provided in the front plate  46  is equal to the distance between the female screws provided in the mobile PC  100 . 
     It should be noted that although an engaging piece  47  is also formed on the front plate  46 , the engaging piece  47  is used in the second embodiment, and is not used in the first embodiment, and hence a description thereof is omitted here. 
     Next, an example of a procedure for attaching the mobile PC  100  and the port expansion adaptor  102  to the display  12  by using the holder  10  of the first embodiment will be described below. First, the two male screws  40  are passed through the through holes  42  and  48  provided in the coupling plate  38  and the front plate  46  of the holder  10 , and the two male screws  40  are screwed into the two female screws (not shown in the drawings) provided in the mobile PC  100 . Thereby, the mobile PC  100  is fixed to the holder  10 . 
     When the mobile PC  100  has been fixed to the holder  10 , the four male screws  15  are passed through the through holes  26  or  28  provided in the projection portions  20  of the holder  10 , and the four male screws  15  are screwed into the four female screws  30  or  32  of the VESA mount section  29  provided on the backside of the display  12 . Although  FIG. 1  shows an example in which the male screws  15  are screwed into the female screws  30  of the first size, the male screws  15  may also be screwed into the female screws  32  of the second size. 
     Thereby, the holder  10  is fixed to the display  12 , and the mobile PC  100  is fixed to the backside  13  of the display  12  through the holder  10 . Then, the port expansion adaptor  102  is inserted into the adaptor storage space surrounded with the base plate  14 , the upper holding section  16 , and the lower holding section  18  through the releasing section of the upper holding section  16  of the holder  10  fixed to the display  12 . The port expansion adaptor  102  is inserted into the adaptor storage space such that the USB type-C cable  104  is positioned above. 
     When the lower portion of the port expansion adaptor  102  inserted into the adaptor storage space through the releasing section of the upper holding section  16  comes into contact with the bottom plate  44  of the lower holding section  18 , the port expansion adaptor  102  is securely held in the holder  10  by the upper holding section  16  and the lower holding section  18  in a state where the port expansion adaptor  102  is caught by the front plate  46  and the base plate  14 . 
     When the port expansion adaptor  102  is held in the holder  10 , the USB type-C cable  104  is inserted into the USB type-C connector  112  of the mobile PC  100  to thereby electrically connect the port expansion adaptor  102  and the mobile PC  100  to each other. Furthermore, the HDMI connector  114  of the port expansion adaptor  102  and the HDMI connector  118  provided in the backside of the display  12  are electrically connected to each other through the HDMI cable  116 , whereby the mobile PC  100  is electrically connected to the display  12 . This state is shown in  FIG. 4 . 
     As described above, according to the first embodiment, the holder  10  can attach the mobile PC  100  and the port expansion adaptor  102  serving as an accessory thereof to the display  12 . The port expansion adaptor  102  is interposed between the rear surface of the display  12  and the backside of the mobile PC  100 , and hence what are required of the adaptor storage space of the holder  10  for storing therein the port expansion adaptor  102  with respect to the front-back direction are only the upper holding section  16 , the lower holding section  18 , and the guide plates  34 , and hence the configuration of the holder  10  is simple. The mobile PC  100  is screwed to the holder  10  from the inside of the holder  10 , and hence it is difficult to easily detach the mobile PC  100  from the holder  10 . Thereby, an effect of deterring that the small-sized mobile PC  100  is maliciously detached or is stolen can be expected. 
     The port expansion adaptor  102  is not fixed to the holder  10  with screws, and is only stored in the space defined by the upper holding section  16 , the lower holding section  18  and the guide plates  34 , and hence can be easily detached from the holder  10 . When the mobile PC  100  is not used, it is possible to connect the port expansion adaptor  102  to some other device and use it. Alternatively, when a software keyboard is displayed on the screen by an application program, the unnecessary port expansion adaptor  102  can be detached. 
     Second Embodiment 
     A holder according to a second embodiment will be described below with reference to  FIG. 5  to  FIG. 9 .  FIG. 5  is an exploded perspective view showing an example of the holder according to the second embodiment for attaching a mobile PC and adaptor to a display.  FIG. 6  is a rear view of an example of a first holder section to which the mobile PC is attached viewed from the display side.  FIG. 7  is a side view of an example of the first holder section.  FIG. 8  is a perspective view of an example of the first holder section attached to a second holder section viewed from the display side.  FIG. 9  is a perspective view showing an example of the holder according to the second embodiment. 
     As shown in  FIG. 5 , a holder  202  of the second embodiment is provided with the holder  10  (referred to as a first holder section  10 A in the second embodiment) of the first embodiment and a second holder section  50 . The second holder section  50  detachably stores therein the mobile PC  100 , and is detachably attached to the front side of the first holder section  10 A. Although the first holder section  10 A of the second embodiment may be identical to the holder  10  of the first embodiment, the through hole  42  of the coupling plate  38  and the through hole  48  of the front plate  46  are not used, and hence may be omitted. Further, the engaging piece  47  not used in the holder  10  of the first embodiment is used to detachably attach the second holder section  50  to the first holder section  10 A in the second embodiment. 
     As shown in  FIG. 6 ,  FIG. 7 , and  FIG. 8 , the second holder section  50  is provided with a holding plate  52 , a pair of right and left supporting guides  54  provided at a lower portion of the holding plate  52 , and a bottom plate  56  forwardly protruding from the lower portion of the holding plate  52 . The holding plate  52 , the supporting guides  54 , and the bottom plate  56  may be formed integral with each other as one body. The holding plate  52  has an approximately plate-like rectangular shape, and a window  58  is provided at a central portion thereof. 
     As shown in  FIG. 6 ,  FIG. 7 , and  FIG. 8 , at an upper portion of the backside of the second holder section  50 , a first engaging section  60  having a hook-like shape when viewed from the lateral direction is provided. The first engaging section  60  includes an upper plate  62  extending from the backside of the holding plate  52  at an upper portion thereof, and lower plate  64  provided at a rear end of the upper plate  62  and extending downwardly, thereby forming the hook-like shape. A gap between the lower plate  64  and the holding plate  52  corresponds to the thickness of the coupling plate  38  provided on the first holder section  10 A in the front-back direction. 
     The window  58  is formed at an upper portion of the central portion of the holding plate  52 , the central portion being at a central portion in the horizontal direction. On both the upper right and left sides of the window  58 , guide plates  66  each having a predetermined height are provided. The guide plates  66  are provided on the backside  53  of the holding plate  52  approximately at right angles thereto, and are curved to be downwardly spread when viewed from the back. The distance a 1  between the upper ends of the right and left guide plates  66  corresponds to the width of the coupling plate  38  of the first holder section  10 A in the horizontal direction. 
     A screw holding member  68  is provided beneath the window  58 . The screw holding member  68  is formed in such a manner as to correspond to the screw section  49  around the through hole  48  provided in the front plate  46  of the first holder section  10 A. 
     A second engaging section  70  is provided beneath the screw holding member  68 . The second engaging section  70  is formed of two right and left longitudinal pieces  72  provided in opposition to each other with a central gap held between them. The gap between the longitudinal pieces  72  is provided in such a manner as to correspond to the engaging piece  47  (see  FIG. 2 ) formed on the front plate  46  of the lower holding section  18  of the first holder section  10 A. 
     As shown in  FIG. 2 , the engaging piece  47  is provided in the longitudinal direction at the central portion of the front plate  46  in the horizontal direction. Further, the engaging piece  47  has a width of an upper portion thereof and width of a lower portion thereof different from each other. The width of the upper portion is formed somewhat narrower than the width of the gap between the longitudinal pieces  72  of the second engaging section  70 . The width of the lower portion is formed narrower than the width of the second engaging section  70  and wider than the width of the gap between the longitudinal pieces  72 . Furthermore, the engaging piece  47  is formed in such a manner that the thickness thereof in the front-back direction is somewhat thinner than the gap between the longitudinal pieces  72  and the holding plate  52  in the front-back direction. 
     The supporting guides  54  of the second holder section  50  are provided on the right and left sides of the holding plate  52  with an interval corresponding to the width of the mobile PC  100  held between them. The supporting guides  54  forwardly extend from the holding plate  52 , and an inwardly bent section  74  is formed at the front edge of each of the supporting guides  54 . Each of the bent sections  74  has a height corresponding to the thickness of the mobile PC  100 . Thereby, the mobile PC  100  arranged between the right and left supporting guides  54  is supported by the supporting guides  54 . 
     The bottom plate  56  forwardly extends from the lower end of holding plate  52  by a predetermined length. The lower side face of the mobile PC stored in the space between the right and left supporting guides  54  comes into contact with the bottom plate  56 , and the mobile PC  100  is supported by the bottom plate  56  from below. 
     Next, an example for attaching the mobile PC  100  and the port expansion adaptor  102  to the display  12  by using the holder  202  according to the second embodiment will be described below. First, as shown in  FIG. 5  and  FIG. 9 , the first holder section  10 A is fixed to the VESA mount section  29  on the backside  13  of the display  12  by means of the male screws  15 . After the first holder section  10 A is fixed to the display  12 , the first engaging section  60  of the second holder section  50  is hung on the upper portion of the coupling plate  38  of the first holder section  10 A. At the same time, the second engaging section  70  is fitted on the engaging piece  47  of the first holder section  10 A. Thereby, the second holder section  50  is attached to the first holder section  10 A. Thereafter, the mobile PC  100  is attached to the second holder section  50 , and the port expansion adaptor  102  is inserted into the first holder section  10 A. Thereby, the port expansion adaptor  102  and mobile PC  100  are attached to the display  12  by means of the holder  202 . It should be noted that by upwardly shifting the second holder section  50 , and releasing the engagement between the second engaging section  70  and engaging piece  47 , the second holder section  50  can be detached from the first holder section  10 A. 
     As described above, in the second embodiment too, the holder  202  which can attach the mobile PC  100  and port expansion adaptor  102  serving as an accessory thereof to the display  12  is provided. The port expansion adaptor  102  can easily be detached from the first holder section  10 A and, when the mobile PC  100  is not used, it is possible to electrically connect the port expansion adaptor  102  to some other device and use it. 
     Furthermore, in the holder  202 , the first holder section  10 A that stores therein the port expansion adaptor  102  and the second holder section  50  that stores therein the mobile PC  100  are members independent of each other, and it is possible to attach only the first holder section  10 A to the display  12 . Accordingly, in the first embodiment, when the width of the mobile PC  100  is wider than the size of the VESA standard, it is not possible to pass the screws  15  through the through holes  26  due to the existence of the mobile PC  100 . However, according to the second embodiment, even when the width of the mobile PC  100  is wider than the size of the VESA standard, only the first holder section  10 A can be attached to the display  12 , and hence even in the case of the mobile PC  100  having a greater width, attachment can be carried out. Although in the first embodiment, the mobile PC  100  is fixed to the holder  10  by means of the screws  40 , in the second embodiment, the mobile PC  100  is detachably stored in the second holder section  50 . Accordingly, it is possible to detach the mobile PC  100  from the holder  202  attached to the display  12 , and use the detached mobile PC  100  for some other purpose. Furthermore, when the number of mobile PCs  100  is smaller than the number of displays  12 , it is possible to detach the mobile PC  100  together with the second holder section  50  from the first holder section  10 A of the holder  202  attached to the display  12 , and attach the detached members to a first holder section  10 A of a holder  202  attached to another display  12 . Thereby, it is possible to cause one mobile PC  100  to be used by a plurality of displays  12 . 
     It should be noted that although the second holder section  50  is engaged with the first holder section  10 A in the vertical direction by means of the first engaging section  60  and the second engaging section  70 , the manner of engagement associated with the first engaging section  60  and the second engaging section  70  is not limited to this. The second holder section  50  may also be engaged with the first holder section  10 A in the horizontal direction. 
     In the second embodiment, the mobile PC  100  is detachably attached to the second holder section  50 , and is not attached to the first holder section  10 A by means of the male screws  40  (see  FIG. 1 ) unlike the first embodiment, and hence the mobile PC  100  need not be provided with female screws. 
     APPLICATION EXAMPLE 
     Although the first and second embodiments have been described by taking the flat-type VESA mount  29  as an example, the types of the VESA mounts  29  include a raised-type in which a mount is formed on a convex portion raised from the backside of the display  12 , and recessed-type in which a mount is formed in a concave portion recessed from the backside of the display  12 .  FIG. 10  shows an example in which the holder  202  of the second embodiment is attached to a display  12 A including a recessed-type VESA mount. A concave section  21  is provided in the backside  13  of the display  12 A at a center thereof, and a recessed-type VESA mount section  29 A is provided on the bottom surface of the concave section  21 . When the holder  202  is attached to the VESA mount section  29 A, extension screws  31 A are used to be connected between the female screw  30  and the male screws  15 . 
     The extension screw  31 A has a length equal to the depth of the concave section  21  and, when the extension screw  31 A is screwed into the female screw  30  of the VESA mount section  29 A, the height of the top face of the extension screw  31 A is aligned with the height of the backside  13  of the display  12  other than the concave section  21 . By using such extension screws  31 A, it is possible to attach the holder  202  of the second embodiment to also the display  12 A including the recessed-type VESA mount. It should be noted that the holder is not limited to the holder  202  of the second embodiment, and it is likewise possible to attach the holder  10  of the first embodiment to the display  12 A including the recessed-type VESA mount. 
     The manner of attaching a holder to a display including a raised-type VESA mount is identical to the attaching manner of each of the first and second embodiments described with reference to  FIG. 1  to  FIG. 9 , and hence a detailed description thereof is omitted. 
     While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. Indeed, the novel embodiments described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes in the form of the embodiments described herein may be made without departing from the spirit of the inventions. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the inventions.