Abstract:
A display device may be mounted on a stand. The stand may present a display screen of the display device at an angle in which it is easy for the user to view the display screen. The desired tilt angle of the display screen may vary depending on where it is positioned, and where it is viewed from. The present invention provides a stand in which the tilt angle of a display device can be changed between at least two different angles. The display device is securely mounted to the stand at all tilt angles.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is based upon and claims the benefit of priority from British Application No. 1002716.7 filed 17 Feb. 2010, the entire contents of which are incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a display apparatus, in particular a stand for a display device having a display screen. The present invention also relates to a display apparatus including a display device and a stand. 
     2. Description of the Related Art 
     Display devices, such as televisions, are conventionally mounted on stands. This enables, for example, the screen of the display to be presented to a user at the correct height. Some stands include a moving joint that allows the screen to be rotated about a horizontal axis. In this way, the tilt angle of the screen can be adjusted in a continuous manner by moving the joint. 
     It is advantageous for any stand on which a display device may be mounted to be robust and stable. 
     The present invention recognises that conventional stands for display devices do not allow the display device to be tilted so as to be able to point the screen at different angles relative to vertical in a simple, reliable and robust manner. 
     OBJECTS AND SUMMARY OF THE INVENTION 
     According to embodiments of the present invention, there is provided a display device comprising:
         a display device having a planar display screen; and   a support stand for supporting the display device, the support stand comprising:
           a base portion configured to rest on a surface; and   at least one post that projects from said base, said at least one post having at least two mounting arrangements, each mounting arrangement being configured to allow said display device to be mounted thereto in a fixed position, wherein:   
           the mounting arrangements are configured such that the angle between the normal to the display screen and the normal to said surface is different when the display device is mounted to the respective mounting arrangements.       

     According to embodiments of the invention, there is also provided support stand for supporting a display device having a planar display screen, the support stand comprising:
         a base portion configured to rest on a surface; and   at least one post that projects from said base, said at least one post having at least two mounting arrangements, each mounting arrangement being configured to allow said display device to be mounted thereto in a fixed position, wherein:   the mounting arrangements are configured such that the angle between the normal to the display screen and the normal to said surface is different when the display device is mounted to the respective mounting arrangements.       

     Such a support stand, or display apparatus comprising such a support stand, enables the angle of the planar display screen to be tilted by changing which mounting arrangement the display device is mounted to. As such, the angle between the normal to the display screen and the normal to the surface on which the base is configured to rest may be referred to herein as the tilt angle. By changing the mounting arrangement to which the display device is mounted, the display device can be rotated from one position to another position about an axis that is substantially parallel to the surface on which the base portion is configured to rest. This surface maybe said to define a reference plane. 
     Thus, for example, the tilt angle of the display screen can be tailored, or adjusted, to the height of the surface on which the entertainment system is located. Additionally or alternatively, the tilt angle of the display screen can be tailored to the height from which the display screen is being viewed. Furthermore, the tilt angle can be readily adjusted by changing which mounting arrangement the display device is mounted to. This can be a straightforward operation. Furthermore, the display device can be securely and robustly mounted to the support stand at each different tilt angle because a separate, specifically designed, mounting arrangement may be provided on the or each post for each tilt angle. As such, there may be no need for complicated, potentially delicate and heavy moving joints to be provided, because each available tilt angle may be fixed by a dedicated mounting arrangement. Thus, the display device, and thus the display screen, can be moved between discrete tilt angles. 
     The mounting arrangements may be provided at different orientations around the or each post. This may mean that the mounting arrangements are provided at different angles around the or each post. For example, the or each post may have a longitudinal axis, and the mounting arrangements may be provided at different angular positions around that longitudinal axis. 
     Providing the mounting arrangements at different orientations around the or each post may enable the mounting arrangements to be separate from each other, such that each mounting arrangement can provide a dedicated, stable mounting for the display device. 
     The or each post may be attachable to the base at different orientations relative to the base. This may mean that the or each post is attachable to the base at more than one (for example at least two) angular positions about an axis that is normal to the surface on which the base portion is configured to rest. Such an axis may pass through the, or each respective post, and thus be referred to as a longitudinal axis of the post. 
     Providing the or each post to be attachable at different orientations relative to the base may allow each of the mounting arrangements to be orientated at different positions relative to the base. In turn, this may allow the display device to be mounted at different angular positions relative to the base without changing the mounting arrangement to which it is attached. 
     At each orientation at which the or each post is attachable to the base, the or each post may have a corresponding mounting arrangement for mounting the display device such that the display screen always faces in the same predetermined direction relative to the base. 
     This may mean, for example, that for each orientation at which a mounting arrangement is provided, the or each post is attachable relative to the base at a correspondingly orientated position. As such, the component of the normal to the display screen that lies in the plane of the surface on which the base portion if configured to rest always points (or can always point) in the same direction relative to the base. In this way, the tilt angle of the display screen can be adjusted without adjusting the main orientation (for example the angle about a vertical axis) of the display screen. Thus, the display screen can point in the same orientation (for example about a vertical axis) relative to a room, but at a different tilt angle. 
     The base may extend further in the predetermined direction than in the opposite direction. 
     This may enable the assembled display apparatus, including the display device and support stand, to be stable, for example not liable to fall over, for example due to the weight of the display device. The stability may be irrespective of which mounting arrangement the display device is mounted to. 
     The base may comprise at least one hole, the number of holes in the base being equal to the number of posts projecting therefrom; and 
     the or each post may be configured to be attachable to the base at more than one orientation relative to the base by insertion through one of said holes at more than one orientation. 
     According to such an arrangement, the support stand can be modular. Providing a modular support stand has the advantage that it can be assembled, disassembled, and reassembled (for example in a different configuration) in a straightforward and reliable manner. As such, it can be easy for the user to change the tilt angle of the display screen. Additionally or alternatively, such an arrangement may allow the user to locate pre-defined orientations of the or each post relative to the base portion in a straightforward way, depending on the shape of the hole. 
     The or each post may have a portion that is configured to cooperate with its corresponding hole when the post is inserted into the hole; and
         the shape of the or each hole may correspond to the shape of the portion of its corresponding post that is configured to cooperate with it.       

     In this way, the or each post can be located into its corresponding hole. This may simplify the construction of the support stand for the user, for example by defining the orientation(s) at which the or each post can be inserted into its corresponding hole. Depending on the shape of the hole (and the corresponding shape of the portion of the post) it may be possible to insert the or each post into its corresponding hole in more than one orientation. For example, if the holes were rectangular, then the or each post could be inserted in at least two different orientations (which would be 180 degrees apart). If the holes were square, then the or each post could be inserted in four different orientations (which would be 90 degrees apart). If the holes were equilateral triangles, then the or each post could be inserted in three different orientations (which would 120 degrees apart). 
     The or each post and hole may have a fixing that allows the or each post to be fixed into position in a corresponding hole at each orientation. Such a fixing may ensure that, once attached in position to the base, the or each post cannot accidentally fall out of position. This can help to ensure that the support stand is stable, and/or easy to handle. However, the fixing may still allow the support stand to be disassembled and reassembled by a user as required, for example to change the orientation of the or each post relative to the base. The fixing may have more than one part. A part of the fixing may be provided in as part of the base. Alternatively or additionally, a part of the fixing may be provided by the or each post. Any suitable fixing could be used. By way of non-limitative example, any one or more of: a screw and thread; nut and bolt; and clip may be used. 
     Each mounting arrangement may comprise a flat surface, the respective flat surfaces of at least two mounting arrangements on the or each post being tilted at different angles relative to the surface on which the base portion is configured to rest; and 
     the display device may comprise at least one corresponding flat surface, the or each of which is arranged to abut a flat surface of a mounting arrangement of a corresponding post. 
     According to this arrangement, the display device is mounted at least partially using a cooperating, or abutting, flat surface on the mounting arrangements. This may ensure that the desired tilt angle of the display screen can be achieved accurately for each mounting arrangement. It may provide a simple, and robust, arrangement for locating the display screen at a different tilt angle depending on which mounting arrangement the display device is mounted to. 
     Each mounting arrangement may comprise a holding mechanism for holding corresponding flat surfaces of the display device and the mounting arrangements together. Any suitable holding mechanism may be used. By way of non-limitative example, any one or more of: a screw and thread; nut and bolt; and clip may be used. 
     Providing a mechanism to hold the flat surfaces together may ensure that the desired tilt angle of the display screen is achieved accurately when the display device is mounted to a particular mounting arrangement. 
     The or each post may comprise two mounting arrangements. This would enable two different tilt angles of the display screen to be achieved. 
     The mounting arrangements on the or each post may be on opposite sides of the or each post. This may provide maximum separation between the mounting arrangements, which may assist the ease of use and provide a particularly stable arrangement. It may also allow a simple mounting arrangement to be used. For example, it may allow one or more parts of one mounting arrangement to be used by another mounting arrangement. 
     Each post may have at least one hole formed therethrough, the or each hole having openings on opposing sides of its respective post, the openings forming part of the mounting arrangements. This may provide a particularly simple and effective mounting arrangement. For example, some or all of the parts of one mounting arrangement (for example a hole and/or associated fastener) could also be used in another mounting arrangement. This could further simplify use and/or reduce cost and/or improve reliability. 
     In any of the described arrangements, the display device may be removably mounted to the mounting arrangements. This feature may allow a user to change the tilt angle of a display screen after assembly, for example more than once. This may be advantageous if, for example, the display apparatus is moved from one surface to another surface which could, for example, be at a different height. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention will more clearly be understood from the following description, given by way of example only, with reference to the accompanying drawings, in which: 
         FIG. 1  shows a side view of a display device mounted on a support stand in a first position; 
         FIG. 2  shows a side view of a display device mounted on a support stand in a second position; 
         FIG. 3  shows a perspective view of a support stand for a display device according to an embodiment of the invention; 
         FIG. 4  shows a side view of a support stand according to the present invention; 
         FIG. 5  shows a side view of a support stand according to claim  4 , in which the orientation of the posts has been changed; 
         FIG. 6  shows a perspective view of a support stand according to the present invention in which one of the posts is being removed; 
         FIG. 7  shows the support stand of  FIG. 6 , in which the post is being re-attached to the base at a different orientation; 
         FIG. 8  shows a perspective view of a support stand for a display device according to an embodiment of the invention which has just one post protruding from its base; and 
         FIG. 9  shows the base portion for a support stand in which the posts are plugged into post platforms on the base portion. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       FIG. 1  shows a display apparatus  10  according to an embodiment of the present invention. The display apparatus  10  has a display device  20 . The display device  20  has a planar display screen  25 . The planar surface of the display screen  25  extends in a perpendicular direction to the plane of  FIG. 1 . 
     The display apparatus  10  shown in  FIG. 1  also has a support stand  30 . The support stand  30  has mounting arrangements  40  (shown in  FIG. 3 ) on which the display device  20  is mounted. The mounting arrangements  40  are part of, or are attached to, one or more posts  50  (shown in  FIG. 3 ) that project from a base portion  60  of the support stand  30 . The base portion  60  is configured to rest on a surface on which the display apparatus  10  is located. The surface on which the display apparatus  10  is located may be referred to as a reference surface. 
       FIG. 2  shows the display apparatus  10  of  FIG. 1  in which the display device is mounted at a different tilt angle relative to the base portion  60  (or relative to the surface on which the base portion  60  is configured to rest). In other words, the angle between the normal  26  to the display screen  25  and the normal  70  to the surface on which the display apparatus  10  is located is different in  FIG. 2  to  FIG. 1 . This is shown by the difference in the angle between the arrows  26  and  70  representing the respective surface normals in  FIG. 1  and  FIG. 2 . 
       FIG. 3  shows the base portion  60  and posts  50  of a support stand  30  according to an embodiment of the present invention in greater detail. 
     The base portion  60  has two holes  65  formed therein. In  FIG. 3 , the holes  65  are formed in raised portions  66  in the base  60 . In the example of  FIG. 3 , a post  50  has been inserted into each hole  65 . Thus, the hole  65  may be said to be closed by the post  50 . Other embodiments may have fewer than, or more than two holes  65 , for example, one, three, four, five, six, seven, eight, or more than eight holes  65 . The number of holes  65  (or, in more general terms, the number of positions for mounting the post or posts  50  on the base  60 ) is equal to the number of posts  50 .  FIG. 8 , for example, shows an embodiment that has just one post  50 . The single post  50  of  FIG. 8  is attached to, or extends from, the base  60 . 
     In the embodiment of  FIG. 3 , the shape of the holes  65  corresponds to the shape of the part of the posts  50  that cooperates (i.e. touches, or abuts) with the holes  65 . In the example of  FIG. 3 , the holes  65  are rectangular, but other shapes (such as triangles, ovals, circles, and squares) could be used. 
     The posts  50  protrude, or extend, from the base  60  through the holes  65 . Each post has at least two mounting arrangements  40 . The embodiment of  FIG. 3  has two mounting arrangements  40  on each post  50 , but in  FIG. 3 , part of just one mounting arrangement  40  is visible on the flat surface  52  of each post  50 . 
     The visible mounting arrangement  40  of each post  50  shown in  FIG. 3  comprises two holes  40 A and  40 B extending though the post  50  from the surface  52  (or face  52 ) of the post  50 . In the embodiment of  FIG. 3 , the surface  52  is a flat surface  52 . A fixing, such as a threaded fixing (for example a screw), may be inserted into the holes  40 A,  40 B in order to mount a display device  20  to the posts  50  of the support stand  30 . Thus, the holes  40 A,  40 B may have a corresponding thread. The threaded fixing(s) may be considered to be part of the mounting arrangement  40 . 
     Any suitable mounting arrangement  40  could be used. For example, the mounting arrangements  40  could protrude from a surface of the post  50 . The protrusions could cooperate with corresponding portions of the display device  20  in order to mount the display device  20  to the support stand  30 . By way of alternative example, the mounting arrangements  40  could comprise a cutout, or slot, or notch, into which a corresponding portion on the display device  20  is located in order to mount the display device  20  to the support stand  30 . 
     Taking just one of the two posts  50  for ease of explanation, the other mounting arrangement  40  (not visible) is on the flat surface (or face)  54  that is on the other side of the post  50 . Thus, it is at a different orientation around the post  50 . In  FIG. 3 , the two mounting arrangements are thus orientated at approximately 180 degrees apart from each other around the post  50 . The post  50  may be said to have a longitudinal axis (which may be said to be substantially perpendicular to the surface on which the base portion  60  is configured to rest). Using that terminology, the mounting arrangements  40  may be said to be at different angular positions on the post  50  around its longitudinal axis. 
     As stated above, different embodiments may have different numbers of mounting arrangements on the or each post  50 . For example, other embodiments may have three, four, five, six, seven, eight, nine, ten, or more than ten mounting arrangements  40  on each post  50 . Regardless of the number of mounting arrangements  40  on each post  50 , they may be positioned at different orientations around the post  50 . For example, they may be positioned at equal angular separations around their post  50 . 
     Although reference may be made to the mounting arrangements  40  on one post  50 , it will be appreciated that embodiments with more than one post  50  (such as that in  FIG. 3 ) would have corresponding mounting arrangements  40  on each post  50 . The mounting arrangements  40  on different posts  50  in such embodiments mount to different parts of the display device  20 . 
     As stated above, the holes  65  in the embodiment of  FIG. 3  are rectangular. As such, they are arranged such that the posts  50  can be inserted through them in two different orientations. Thus, the posts can be attached to the base  60  at two different orientations. In the embodiment of  FIG. 3 , the two different orientations are 180 degrees apart. This means that either of the two surfaces  52 ,  54  of the posts  50  can be arranged to point towards (i.e the surface normal of those surfaces  52 ,  54  can be arranged to point towards) a front edge, or front portion,  62  of the base  60 . This is shown in  FIGS. 4 and 5 . 
     In  FIG. 4 , the flat surface  52  points towards the front edge  62  of the base  60 . In  FIG. 5 , the flat surface  54  points towards the front edge  62  of the base  60 . The movement of the post  50  between the position shown in  FIG. 4  and that in  FIG. 5  is described herein in relation to  FIGS. 6 and 7 . 
     Both of the flat surfaces  52 ,  54  that can point towards the front edge portion  62  have associated mounting arrangements  40 . This means that the display device can be mounted to either of the two flat surfaces  52 ,  54 . Furthermore, in  FIG. 3 , the angle between the mounting arrangements on each flat surface  52 ,  54  around the post  50  is the same as the angle between the two different orientations at which the post  50  is attachable to the base  60 , namely 180 degrees. This means that the mounting arrangements  40  on the flat surface  52  can face in the same predetermined direction relative to the base  60  as the mounting arrangements  40  on the flat surface  52 . This can be achieved by changing the orientation at which the post  50  is attached to the base  60 . 
     In different embodiments, the hole shape need not be rectangular. Any shape could be used. In some embodiments, shapes which have rotational symmetry of at least order two are used. As will be understood from the description above in relation to the rectangular holes, having rotational symmetry of at least order two enables the posts  50  to be inserted into the holes  65  in more than one orientation. This can enable different mounting arrangements  40  to face in a predetermined direction relative to the base  60  (for example in the direction of a front edge  62 ). For example, if holes  65  (and corresponding post portions) with a rotational symmetry of order  3  are used (for example an equilateral triangle), then three different mounting arrangements  40  could face in a predetermined direction relative to the base  60 . By way of further example, if holes  65  (and corresponding post portions) with a rotational symmetry of order  4  are used (for example a square), then four different mounting arrangements  40  could face in a predetermined direction relative to the base  60 . 
     In some embodiments, rotational symmetry of the posts is not required. In such embodiments, mounting arrangements  40  can still face in a predetermined direction relative to the base  60 . For example, so long as the angular separation between orientations at which the or each post  50  can be attached to the base  60  is the same as the angular separation between the orientations of the corresponding mounting arrangements  40  around the or each post  50 , then the different mounting arrangements  40  can still face in a predetermined direction relative to the base  60  when the orientation of the post  50  attachment to the base  60  is changed. 
     Turning now to the embodiment shown in  FIG. 3 , the two flat surfaces  52 ,  54  have surface normals that form a different angle with the normal to the base  60 , or the normal  70  to the surface on which the base  60  is configured to rest. This can be seen in  FIGS. 4 and 5 , in which the normal to the surface on which the base  60  rests is denoted by arrow  70 , the normal to the surface  52  is denoted by arrow  72 , and the normal to the surface  54  is denoted by arrow  74 . 
     This arrangement allows the planar screen  25  of the display device  20  to be at a different tilt angle depending on whether it is mounted to the mounting arrangements  40  on the flat surface  52  or the mounting arrangements  40  on the flat surface  54 . In some embodiments, the display device  20  has one or more flat surfaces that correspond to at least a part of the surfaces  52 ,  54  of the post  50 . In such embodiments, the or each flat surface of the display device is arranged to abut the flat surface  52  and the flat surface  54  of the post  50 . Which of the two flat surfaces  52 ,  54  the flat surface of the display device abuts at a given time depends on which flat surface  52 ,  54  the display device  20  is being mounted to. In such embodiments, the difference between the angle of the normal to the two flat surfaces  52 ,  54  of the post  50  corresponds to the difference between the tilt angle of the planar display screen when it is mounted to the respective flat surfaces  52 ,  54 . 
     As mentioned elsewhere herein, any suitable mounting arrangement  40  may be used. In some embodiments, the mounting arrangement  40  may not comprise a flat surface. 
     In the embodiment of  FIG. 3 , the posts  50  are removable from the base  60 . This enables the orientation of the post to be rotated relative to the base  60 . This means that the post  50  can be switched in orientation from that shown in  FIG. 4  to that shown in  FIG. 5 . An example of a process used to change the orientation of the post  50  relative to the base  60  will be explained below with reference to  FIGS. 6 and 7 . 
     In  FIG. 6 , one of the posts  50 , which is shown in a partial section view, is being removed from the base  60 . As shown in  FIG. 6 , the post  50  is removed through the underside of the base  60 , through the hole  65 . Some embodiments may include a fixing that fixes the post  50  into position in its corresponding hole  65 . Such a fixing may comprise, for example, a screw inserted through dedicated holes in the post  50  and the base  60 . The arrows  80  shown in  FIG. 7  represent screws being inserted through the post  50  and base  60  upon reassembly. Alternative fixings could be used, for example, clips, notches, and other fastenings. Alternatively, some embodiments may not include such a fixing. In any embodiments that do include such a fixing, the retaining force of the fixing would have to be removed before the post  50  could be extracted through the hole  65  as shown in  FIG. 6 . 
       FIG. 6  also includes an arrow  90  that indicates rotation of the post relative to the base  60 . This rotation  90  is performed after the post  50  has been removed, or sufficiently removed, from the hole  65 . The rotation  90  may be said to be about a longitudinal axis of the post  50  in the example shown in  FIG. 6 . 
     Once the post has been rotated by the correct amount (180° in the example of  FIG. 6 ), it can be re-inserted into the hole  65 . The fixings  80  may then be used, as required, to fix the post  50  into its new orientation relative to the base  60 . 
     In order to change the tilt angle of the display screen  25  of the display device  20 , the following process may therefore be performed. Firstly, the display device  20  may be removed from the or each post  50 . This may require the mounting arrangement  40  to be undone in the manner appropriate for the particular mounting arrangement used. The display device  20  can then be set to one side. With the display device  20  removed from the support stand  30 , the orientation of the posts can then be changed in the manner described above in relation to  FIGS. 6 and 7 . In this way, a different set of mounting arrangements can be made to face a predetermined direction, for example the front edge  62  of the base  60 . The display device  20  can then be re-attached to the post  50  using the different set of mounting arrangements  40  that now face towards the front edge  62  of the base  60 . These different mounting arrangements  40  can be configured such that, when the display device is mounted to them, the surface normal  26  of the planar display screen  25  is at a different angle to the normal  70  to the surface on which the base portion  60  rests to the angle at the start of the operation. 
     In the embodiment described above in relation to  FIGS. 6 and 7  (and indeed in the embodiment described below in relation to  FIG. 9 ), the size of the base portion  60  in the direction of a front edge  62  may be bigger than in the opposite direction. Thus, the size of the base portion  60  in the direction in which the planar display screen  25  faces may be larger than the size in the opposite direction. This may help to improve the stability of the display apparatus, for example by reducing the likelihood of it toppling forwards in the direction in which the planar display screen  25  faces. 
     In some embodiments, the posts  50  may be attached to the base  60  without inserting them through holes  65  in the base  60 . As such, in some embodiments, the base  60  may not have the holes  65 . The base  60  for such an embodiment is shown in  FIG. 9 . As shown in  FIG. 9 , the base  60  has post platforms  67  (which may be referred to as mountings, or post mountings). The posts  50  are attached, or mounted, to the base  60  using the post platforms  67 . For example, the posts  50  may have corresponding engagement portions that attach onto or into, or engage with, the post platforms  67  in order to mount the posts  50  onto the base  60 . 
     All of the relevant features described herein in relation to an embodiment in which the posts  50  are inserted through holes  65  in the base  60  also apply to embodiments in which the posts  50  are attached to the base  60  using post platforms  67 . Thus, for example, any number of posts  50  may be attached to the base  60  using the post platforms  67 . Furthermore, the post platforms  67  may allow the posts  50  to be mounted onto the base  60  at more than one orientation. As with the embodiment in which the posts are attached through holes  65  in the base  60 , the orientations at which the posts  50  can be attached to the base  60  using the post platforms  67  may correspond to the orientations at which the mounting arrangements  40  are provided on the posts  50 . 
     In the embodiment shown in  FIG. 9 , the posts  50  may be mounted onto the base  60  by pushing them in the direction of the arrows  100 . Similarly, the posts  50  may be removed from the base  60  by moving (for example pulling) them in the direction opposite to the arrows  100 . 
     In some embodiments, the posts  50  may be fixed relative to the base  60 . Thus, referring to  FIG. 3 , the surface  52  of the post  50  would always face in the direction of the front edge  62  of the base  60 , and the surface  54  of the post  50  would always face away from the front edge  62  of the base  60  in such an embodiment. Of course, in embodiments in which the posts  50  are fixed relative to the base  60 , the operation for moving the orientation of the posts  50  relative to the base  60  described above in relation to  FIGS. 6 and 7  is not relevant. 
     In an embodiment where the posts  50  are fixed relative to the base  60 , the tilt angle of the planar display screen  25  may be changed by removing the display device  20  from one set of mounting arrangements  40 , and then re-attaching it to another set of mounting arrangements  40  on another part of the post  50 . For example, with reference to  FIG. 3 , the display device  20  could be removed from the mounting arrangements  40  on the surface  52 , and then re-attached to the mounting arrangements  40  on the surface  54 . Thus, in such an embodiment, the direction in which the planar display screen  25  faces relative to the base also changes in addition to the change in tilt angle. 
     Referring once again to  FIG. 3 , in an embodiment where the posts  50  are fixed relative to the base  60 , the planar display screen would face in the direction of the front edge  62  of the base  60  when attached to the mounting arrangements  40  on surface  52 , and would face away from the front edge  62  of the base  60  when mounted to the mounting arrangements  40  of the surface  54 . Of course, in such an embodiment, the post  50  may comprise any number of mounting arrangements  40  at different orientations around it. Each set of mounting arrangements  40  may be configured to mount the display device  20  such that the planar display screen  25  is at a different tilt angle. For example, there could be two, three, four, five, six, seven, eight, nine, ten or more than ten mounting arrangements  40  at different orientations around the or each post  50 . Each mounting arrangement  40  may be configured to result in a different tilt angle of the planar display screen  25  when the display device  20  is attached to it. In such an embodiment in which the posts  50  are fixed relative to the base  60 , the base  60  is arranged (for example shaped), and/or the posts  50  are arranged (for example positioned) on the base  60  such that the display apparatus is stable regardless of to which mounting arrangement  40  the display device  20  is mounted. 
     Although specific embodiments have been described above in relation to the figures, it will be appreciated that various other arrangements fall within the scope of the present invention as defined in the attached claims. For example, in one embodiment the post  50  and base  60  may be initially provided separately from each other (for example in modular form), but once they are assembled together for the first time, the post  50  may become fixed in place relative to the base  60 . This gives a user an option as to which tilt angle to use, but once the tilt angle has been chosen, it is permanently fixed. 
     Furthermore, it will be appreciated that any feature described herein in relation to a particular embodiment may be combined with any other compatible feature described in relation to a different embodiment.