Abstract:
A flat panel display remote-controlled viewing angle adjustment system ( 1 ) comprising a support assembly ( 2 ) for supporting a flat panel display ( 9 ), an electrical driving assembly for driving the support assembly ( 2 ), and an angular control assembly attached to the support assembly ( 2 ). The adjustable system ( 1 ) is configured such that when the electrical driving assembly is started, the flat panel display ( 9 ) is rotated about a vertical axis that passes through one of the left side and the right side of the flat panel display ( 9 ) and only when the flat panel display ( 9 ) returns to zero angle position can it rotate about a vertical axis that passes through the other of the left side and the right side of the flat panel display ( 9 ).

Description:
TECHNICAL FIELD 
     The present invention generally relates to a flat panel display remote-controlled viewing angle adjustment system, and more particularly to such a device for which the viewing angle of the flat panel display can be remotely adjusted. 
     BACKGROUND OF INVENTION 
     Flat panel displays, such as LCD and plasma television, have become increasingly popular and now almost dominate the market which used to belong to traditional CRT. Because flat panel displays are thin in profile, they are often mounted on walls, brackets, or other vertical flat surfaces in order to save space. For a better viewing angle, flat panel displays are often mounted on a support device which can be rotated to a desired angle. Numerous patents directed to mounting devices allow the viewing angle to be adjusted can be found. 
     U.S. Pat. No. 7,296,774 (Sung I. Oh) is directed to a viewing angle adjustment system, which provides a support arm to couple a monitor to a surface such as a wall or ceiling to remotely adjust the viewing angle of the monitor. The support arm includes at least one motor along a pivot axis in the support arm. The motor can be activated by a processor that receives the control signal provided by a remote control. The support arm may include a plurality of pivot axes with a motor mounted on each of the pivot axes to adjust the viewing angle with respect to the vertical and horizontal planes. 
     US 2007/0125917A1 (Sung Il Oh et al.) is directed to a motorized mount system for repositioning a monitor capable of extending a monitor from a reference plane, and tilting and swiveling the monitor in reference to X, Y, and Z axes. The motorized mount system includes a first pair of arms between a base plate and an adapter plate. The base plate is adapted to attach to a wall and the adapter plate is adapted to attach to a back side of the monitor. The first pair of arms includes two pivoting arms which are symmetrical with respect to each other. The proximal ends of the two pivoting arms are pivotally coupled to the base plate and the distal ends of the two pivoting arms are pivotally coupled to the adapter plate. At least one of the proximal ends of the first pair of arms can be engaged with a motor to rotate the distal end about its axis, which in turn extends or retracts the distal ends of the first pair of arms. Another motor can be coupled to the distal end of the first pair of arms to swivel the monitor side to side. Yet another motor can be coupled to the distal end of the first pair of arms to tilt the monitor up and down. 
     It is noted that the mechanisms shown in the above patents are generally in the form of links or arms. The links or arms have the advantage of structural simplicity, but are weak or too large when they are used to support an object having substantial weight, particularly if they are required to be rotatable. Furthermore, as the display panel gets larger and heavier, the structure of a support device formed of links or arms can be too weak to safely support it. 
     Furthermore, when the angle of a display is adjusted, the center of gravity of the device as disclosed above will be displaced away from the wall or the surface where the device/display is mounted, and the displacement will impose additional stress on the support device, especially in translational movement, further aggravating the problem of structural weakness of the support device. 
     U.S. Pat. No. 7,648,112 is directed to a flat panel display mounting device for securing a flat panel display to a support surface. The flat panel display mounting device comprises a plurality of members in the form of support panels pivotally connected together and a rotation control mechanism connected thereto so that the flat panel display mounted on the device can be rotated to a desired angle and the center of gravity of the flat panel display during rotation can be maintained as close to the support surface as possible, so as not to generate additional stress to the flat panel display mounting device. The inventors of the present invention, Jin Fang and Andrew H. Lew, are co-assignees of U.S. Pat. No. 7,648,112, which is incorporated herein by reference. The mechanism of the mounting device disclosed in U.S. Pat. No. 7,648,112 is applied to the present invention with some components added therein to electrically drive and control the mechanism. 
     SUMMARY OF THE INVENTION 
     One object of the present invention is to provide a flat panel display remote-controlled viewing angle adjustment system that can overcome the weakness in the structure inherent to most support devices for flat panel displays in which links or arms are used. 
     Another object of the present invention is to provide a flat panel display remote-controlled viewing angle adjustment system that is motor driven such that the flat panel display remote-controlled viewing angle adjustment system can be operated automatically. 
     Another object of the present invention is to provide a flat panel display remote-controlled viewing angle adjustment system which is remotely controlled such that a user can easily adjust the viewing angle of the flat display panel. 
     In one aspect, the present invention is directed to a flat panel display remote-controlled viewing angle adjustment system comprising a support assembly for supporting a flat panel display having six rigid and rectangular panels connected by hinges, an electrical driving assembly for driving the support assembly arranged at the support assembly, and an angular control assembly having two electric stoppers attached to the support assembly. In one embodiment, the electric stoppers are electrically connected with the electrical driving assembly. 
     In another aspect, the present invention is directed to a flat panel display remote-controlled viewing angle adjustment system comprising a support assembly for supporting a flat panel display having six rigid and rectangular panels connected by hinges, an electrical driving assembly for driving the support assembly arranged at the support assembly, and a angular control assembly which is a rotation control mechanism attached to the support assembly. 
     In a further aspect, the present invention is directed to a flat panel display remote-controlled viewing angle adjustment system comprising a support assembly for supporting a flat panel display having four rigid and rectangular panels connected by hinges, an electrical driving assembly for driving the support assembly arranged at the support assembly, and an angular control assembly which is a rotation control mechanism attached to the support assembly. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a first embodiment of the flat panel display remote-controlled viewing angle adjustment system of the present invention. 
         FIGS. 2A-2D  show an operating process of the first embodiment of the present invention. 
         FIGS. 3A-3D  show another operating process of the first embodiment of the present invention. 
         FIG. 4  shows a second embodiment of the flat panel display remote-controlled viewing angle adjustment system of the present invention. 
         FIGS. 5A-5D  show an operating process of the second embodiment of the present invention. 
         FIGS. 6A-6D  show another operating process of the second embodiment of the present invention. 
         FIG. 7  shows a third embodiment of the flat panel display remote-controlled viewing angle adjustment system of the present invention. 
         FIGS. 8A-8D  show an operating process of the third embodiment of the present invention. 
         FIGS. 9A-9D  show another operating process of the third embodiment of the present invention. 
         FIG. 10  shows a fourth embodiment of the flat panel display remote-controlled viewing angle adjustment system of the present invention. 
         FIGS. 11A-11D  show an operating process of the fourth embodiment of the present invention. 
         FIGS. 12A-12D  show another operating process of the fourth embodiment of the present invention. 
         FIG. 13  shows a fifth embodiment of the flat panel display remote-controlled viewing angle adjustment system of the present invention. 
         FIGS. 14A-14D  show an operating process of the fifth embodiment of the present invention. 
         FIGS. 15A-15D  show another operating process of the fifth embodiment of the present invention. 
         FIG. 16  shows a sixth embodiment of the flat panel display remote-controlled viewing angle adjustment system of the present invention. 
         FIGS. 17A-17D  show an operating process of the sixth embodiment of the present invention. 
         FIGS. 18A-18D  show another operating process of the sixth embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       FIG. 1  and  FIGS. 2A-2D  show a first embodiment of the flat panel display remote-controlled viewing angle adjustment system  1 . The system  1  comprises a support assembly  2 , which further comprises a base support panel member  21 , a display support panel member  23 , a first support panel member  233 , a second support panel member  213 , a third support panel member  231 , and a fourth support panel member  211 . The base support panel member  21  can be fixed to a support or on a wall and the display support panel member  23  is to support a flat panel display  9 . The right edge of the base support panel member  21  is pivotally connected to the left edge of the second support panel member  213  and the left edge of the base support panel member  21  is pivotally connected to the right edge of the fourth support panel member  211 . The right edge of the display support panel member  23  is pivotally connected to the left edge of the first support panel member  233  and the left edge of the display support panel member  23  is pivotally connected to the right edge of the third support panel member  231 . Moreover, the left edge of the third support panel member  231  is pivotally connected to the left edge of the fourth support panel member  211  and the right edge of the first support panel member  233  is pivotally connected to the right edge of the second support panel member  213 . 
     A first driving mechanism  25  is arranged substantially at the pivot joint of the base support panel member  21  and the second support panel member  213 . The first driving mechanism  25  comprises a motor  251  and a gear box  255  for reducing the speed of the motor  251 . When the motor  251  is started, the first driving mechanism  25  will drive the second support panel member  213  to rotate about the pivot joint of the second support panel member  213  and the base support panel member  21 . A first control unit  27  is arranged substantially at the pivot joint of the base support panel member  21  and the second support panel member  213  and electrically connected to the first driving mechanism  25 . In particular, the first control unit  27  is attached to the first driving mechanism  25 . Further, the first control unit  27  comprises a first positioning switch  271  and a first limit switch  272 . 
     A second driving mechanism  26  is arranged substantially at the pivot joint of the base support panel member  21  and the fourth support panel member  211 . The second driving mechanism  26  comprises a motor  261  and a gear box  265  for reducing the speed of the motor  261 . When the motor  261  is started, the second driving mechanism  26  will drive the fourth support panel member  211  to rotate about the pivot joint of the fourth support panel member  211  and the base support panel member  21 . A second control unit  29  is arranged substantially at the pivot joint of the base support panel member  21  and the fourth support panel member  211  and electrically connected to the second driving mechanism  26 . In particular, the second control unit  29  is attached to the second driving mechanism  26 . Further, the second control unit  29  comprises a second positioning switch  291  and a second limit switch  292 . 
     Further, the first driving mechanism  25  and the second driving mechanism  26  can be remotely controlled. 
     Moreover, a first electric stopper  31  is arranged between the display support panel member  23  and the first support panel member  233 , and the second electric stopper  32  is arranged between the display support panel member  23  and the third support panel member  231 . The first electric stopper  31  and the second electric stopper  32  are electrically connected to the first driving mechanism  25  and the second driving mechanism  26 . In particular, the first electric stopper  31  and the second electric stopper  32  can be solenoid valves. 
     In addition, the first positioning switch  271  and the first limit switch  272  cooperate with the motor  251 . When the first positioning switch  271  or the first limit switch  272  is turned on, the motor  251  will stop. Likewise, the second positioning switch  291  and the second limit switch  292  cooperate with the motor  261  of the second driving mechanism  26 . When the second positioning switch  291  or the second limit switch  292  is turned on, the motor  261  will stop. 
     Further, the first electrical stopper  31  and the second electrical stopper  32  cooperate with the motor  251  and the motor  261 . When the first driving mechanism  25  is started, the first electric stopper  31  is set to non-actuate position and the second electric stopper  32  is set to actuate position. When the second driving mechanism  26  is started, the second electric stopper  32  is set to non-actuate position and the first electric stopper  31  is set to actuate position. 
       FIGS. 2A-2D  show an operating process of the first embodiment of the present invention. As shown in  FIG. 2A , when the flat panel display remote-controlled viewing angle adjustment system  1  is at the initial position, the base support panel member  21 , the second support panel member  213 , and the fourth support panel member  211  form one plane, and the display support panel member  23 , the first support panel member  233 , and the third support panel member  231  form another plane parallel to and directly in front of the former plane. At this position, the first positioning switch  271  and second positioning switch  291  are in the “on” mode, the first limit switch  272  and the second limit switch  292  are in the “off” mode As shown in  FIGS. 2B and 2C , when the first driving mechanism  25  is started, the first electric stopper  31  is set to non-actuate position, the second electric stopper  32  is set to actuate position, and the motor  251  will drive the second support panel member  213  to rotate clockwise about the pivot joint of the second support panel member  213  and the base support panel member  21 . The first positioning switch  271  will thus be turned off, and the display support panel member  23  as well as the third support panel member  231  will rotate clockwise about the pivot joint of the third support panel member  231  and the fourth support panel member  211 . Therefore, the flat panel display  9  supported on the display support panel member  23  will rotate substantially about its left edge as shown in  FIGS. 2A-2D . 
     When the flat panel display remote-controlled viewing angle adjustment system  1  continues to rotate to a predetermined angular position (as shown in  FIG. 2D ), the first limit switch  272  is turned on and the motor  251  will stop, and so will the second support panel member  213 . 
     In the mode that the first limit switch  272  is turned on, if the first driving mechanism  25  is started once more, it will only rotate counter-clockwise. The first driving mechanism  25  will drive the second support panel member  213  to rotate counter-clockwise about the pivot joint of the second support panel member  213  and the base support panel member  21 . When the second support panel member  213  is driven to rotate counter-clockwise, the first limit switch  272  will be turned off. Thus, the display support panel member  23  and the third support panel member  231  will rotate counter-clockwise about the pivot joint of the third support panel member  231  and the fourth support panel member  211 . As that rotation continues, the flat panel display remote-controlled viewing angle adjustment system  1  will rotate back to the initial position as shown in  FIG. 2A , and the first the positioning switch  271  is turned on, and thus the motor  251  will stop. 
       FIGS. 3A-3D  show another operating process of the first embodiment of the present invention. As shown in  FIG. 3A  (a replicate of  FIG. 2A ), when the flat panel display remote-controlled viewing angle adjustment system  1  is at the initial position, the base support panel member  21 , the second support panel member  213 , and the fourth support panel member  211  form one plane, and the display support panel member  23 , the first support panel member  233 , and the third support panel member  231  form another plane parallel to and directly in front of the former plane. At this position, the first positioning switch  271  and second positioning switch  291  are in the “on” mode, the first limit switch  272  and the second limit switch  292  are in the “off” mode. As shown in  FIGS. 3B and 3C , when the second driving mechanism  26  is started, the first electric stopper  31  is set to actuate position and the second electric stopper  32  is set to non-actuate position, and the motor  261  will drive the fourth support panel member  211  to rotate counter-clockwise about the pivot joint of the fourth support panel member  211  and the base support panel member  21 . The second positioning switch  291  will thus be turned off, and the display support panel member  23  as well as the first support panel member  233  will rotate counter-clockwise about the pivot joint of the first support panel member  233  and the second support panel member  213 . Therefore, the flat panel display  9  supported on the display support panel member  23  will rotate substantially about its right edge as shown in  FIGS. 3A-3D . 
     When the flat panel display remote-controlled viewing angle adjustment system  1  continues to rotate to a predetermined angular position (as shown in  FIG. 3D ), the second limit switch  292  is turned on and the motor  261  will stop, and so will the fourth support panel member  211 . 
     In the mode that the second limit switch  292  is turned on, if the second driving mechanism  26  is started once more, it will only rotate clockwise. The second driving mechanism  26  will drive the fourth support panel member  211  to rotate clockwise about the pivot joint of the fourth support panel member  211  and the base support panel member  21 . When the fourth support panel member  211  is driven to rotate clockwise, the second limit switch  292  will be turned off. Thus, the display support panel member  23  and the first support panel member  233  will rotate clockwise about the pivot joint of the first support panel member  233  and the second support panel member  213 . As that rotation continues, the flat panel display remote-controlled viewing angle adjustment system  1  will rotate back to the initial position as shown in  FIG. 3A , and the second the positioning switch  291  is turned on, and thus the motor  261  will stop. 
     The above rotating operation ensures a minimum displacement of the center of gravity of the flat panel display  9  away from the surface of the wall or the support. In other words, there is only an angular component of movement of the center of gravity of the flat panel display  9  and no translational component during angular adjustment of the flat panel display  9 . Thus, the load, i.e., the combined weight of the flat panel display remote-controlled viewing angle adjustment system  1  and the flat panel display  9  and the moment that it generates and which is exerted on the support assembly  2  during the rotation can be as low as possible. 
       FIG. 4  shows a second embodiment of the flat panel display remote-controlled viewing angle adjustment system  1 . The system  1  comprises a support assembly  2 , which further comprises a base support panel member  21 , a display support panel member  23 , a first support panel member  233 , a second support panel member  213 , a third support panel member  231 , and a fourth support panel member  211 . The base support panel member  21  can be fixed to a support or on a wall and the display support panel member  23  is to support a flat panel display  9 . The right edge of the base support panel member  21  is pivotally connected to the left edge of the second support panel member  213  and the left edge of the base support panel member  21  is pivotally connected to the right edge of the fourth support panel member  211 . The right edge of the display support panel member  23  is pivotally connected to the left edge of the first support panel member  233  and the left edge of the display support panel member  23  is pivotally connected to the right edge of the third support panel member  231 . Moreover, the left edge of the third support panel member  231  is pivotally connected to the left edge of the fourth support panel member  211  and the right edge of the first support panel member  233  is pivotally connected to the right edge of the second support panel member  213 . 
     A first driving mechanism  25  is arranged substantially at the pivot joint of the first support panel member  233  and the display support panel member  23 . The first driving mechanism  25  comprises a motor  251  and a gear box  255  for reducing the speed of the motor  251 . When the motor  251  is started, the first driving mechanism  25  will drive the first support panel member  233  to rotate about the pivot joint of the first support panel member  233  and the display support panel member  23 . A first control unit  27  is arranged substantially at the pivot joint of the first support panel member  233  and the display support panel member  23  and electrically connected to the first driving mechanism  25 . In particular, the first control unit  27  is attached to the first driving mechanism  25 . Further, the first control unit  27  comprises a first positioning switch  271  and a first limit switch  272 . 
     A second driving mechanism  26  is arranged substantially at the pivot joint of the third support panel member  231  and the display support panel member  23 . The second driving mechanism  26  comprises a motor  261  and a gear box  265  for reducing the speed of the motor  261 . When the motor  261  is started, the second driving mechanism  26  will drive the third support panel member  231  to rotate about the pivot joint of the third support panel member  231  and the display support panel member  23 . A second control unit  29  is arranged substantially at the pivot joint of the third support panel member  231  and the display support panel member  23  and electrically connected to the second driving mechanism  26 . In particular, the second control unit  29  is attached to the second driving mechanism  26 . Further, the second control unit  29  comprises a second positioning switch  291  and a second limit switch  292 . 
     Further, the first driving mechanism  25  and the second driving mechanism  26  can be remotely controlled. 
     Moreover, a first electric stopper  31  is arranged between the base support panel member  21  and the second support panel member  213 , and the second electric stopper  32  is arranged between the base support panel member  21  and the fourth support panel member  211 . The first electric stopper  31  and the second electric stopper  32  are electrically connected to the first driving mechanism  25  and the second driving mechanism  26 . In particular, the first electric stopper  31  and the second electric stopper  32  can be solenoid valves. 
     In addition, the first positioning switch  271  and the first limit switch  272  cooperate with the motor  251 . When the first positioning switch  271  or the first limit switch  272  is turned on, the motor  251  will stop. Likewise, the second positioning switch  291  and the second limit switch  292  cooperate with the motor  261  of the second driving mechanism  26 . When the second positioning switch  291  or the second limit switch  292  is turned on, the motor  261  will stop. 
     Further, the first electrical stopper  31  and the second electrical stopper  32  cooperate with the motor  251  and the motor  261 . When the first driving mechanism  25  is started, the first electric stopper  31  is set to non-actuate position and the second electric stopper  32  is set to actuate position. When the second driving mechanism  26  is started, the second electric stopper  32  is set to non-actuate position and the first electric stopper is set to actuate position. 
       FIGS. 5A-5D  show an operating process of the second embodiment of the present invention. As shown in  FIG. 5A , when the flat panel display remote-controlled viewing angle adjustment system  1  is at the initial position, the base support panel member  21 , the second support panel member  213 , and the fourth support panel member  211  form one plane, and the display support panel member  23 , the first support panel member  233 , and the third support panel member  231  form another plane parallel to and directly in front of the former plane. At this position, the first positioning switch  271  and second positioning switch  291  are in the “on” mode, the first limit switch  272  and the second limit switch  292  are in the “off” mode As shown in  FIGS. 5B and 5C , when the first driving mechanism  25  is started, the first electric stopper  31  is set to non-actuate position, the second electric stopper  32  is set to actuate position, and the motor  251  will drive the first support panel member  233  to rotate counter-clockwise about the pivot joint of the first support panel member  233  and the display support panel member  23 . The first positioning switch  271  will thus be turned off, and the display support panel member  23  as well as the third support panel member  231  will rotate clockwise about the pivot joint of the third support panel member  231  and the fourth support panel member  211 . Therefore, the flat panel display  9  supported on the display support panel member  23  will rotate substantially about its left edge as shown in  FIGS. 5A-5D . 
     When the flat panel display remote-controlled viewing angle adjustment system  1  continues to rotate to a predetermined angular position (as shown in  FIG. 5D ), the first limit switch  272  is turned on and the motor  251  will stop, and so will the first support panel member  233 . 
     In the mode that the first limit switch  272  is turned on, if the first driving mechanism  25  is started once more, it will only rotate clockwise. The first driving mechanism  25  will drive the first support panel member  233  to rotate clockwise about the pivot joint of the first support panel member  233  and the display support panel member  23 . When the first support panel member  233  is driven to rotate clockwise, the first limit switch  272  will be turned off. Thus, the display support panel member  23  and the third support panel member  231  will rotate counter-clockwise about the pivot joint of the third support panel member  231  and the fourth support panel member  211 . As that rotation continues, the flat panel display remote-controlled viewing angle adjustment system  1  will rotate back to the initial position as shown in  FIG. 5A , and the first the positioning switch  271  is turned on, and thus the motor  251  will stop. 
       FIGS. 6A-6D  show another operating process of the second embodiment of the present invention. As shown in  FIG. 6A  (a replicate of  FIG. 5A ), when the flat panel display remote-controlled viewing angle adjustment system  1  is at the initial position, the base support panel member  21 , the second support panel member  213 , and the fourth support panel member  211  form one plane, and the display support panel member  23 , the first support panel member  233 , and the third support panel member  231  form another plane parallel to and directly in front of the former plane. At this position, the first positioning switch  271  and second positioning switch  291  are in the “on” mode, the first limit switch  272  and the second limit switch  292  are in the “off” mode. As shown in  FIGS. 6B and 6C , when the second driving mechanism  26  is started, the first electric stopper  31  is set to actuate position and the second electric stopper  32  is set to non-actuate position, and the motor  261  will drive the third support panel member  231  to rotate clockwise about the pivot joint of the third support panel member  231  and the display support panel member  23 . The second positioning switch  291  will thus be turned off, and the display support panel member  23  as well as the first support panel member  233  will rotate counter-clockwise about the pivot joint of the first support panel member  233  and the second support panel member  213 . Therefore, the flat panel display  9  supported on the display support panel member  23  will rotate substantially about its right edge as shown in  FIGS. 6A-6D . 
     When the flat panel display remote-controlled viewing angle adjustment system  1  continues to rotate to a predetermined angular position (as shown in  FIG. 6D ), the second limit switch  292  is turned on and the motor  261  will stop, and so will the third support panel member  231 . 
     In the mode that the second limit switch  292  is turned on, if the second driving mechanism  26  is started once more, it will only rotate counter-clockwise. The second driving mechanism  26  will drive the third support panel member  231  to rotate counter-clockwise about the pivot joint of the third support panel member  231  and the display support panel member  23 . When the third support panel member  231  is driven to rotate counter-clockwise, the second limit switch  292  will be turned off. Thus, the display support panel member  23  and the first support panel member  233  will rotate clockwise about the pivot joint of the first support panel member  233  and the second support panel member  213 . As that rotation continues, the flat panel display remote-controlled viewing angle adjustment system  1  will rotate back to the initial position as shown in  FIG. 5A , and the second the positioning switch  291  is turned on, and thus the motor  261  will stop. 
     The above rotating operation ensures a minimum displacement of the center of gravity of the flat panel display  9  away from the surface of the wall or the support. In other words, there is only angular component of movement of the center of gravity of the flat panel display  9  and no translational component during angular adjustment of the flat panel display  9 . Thus, the load, i.e., the combined weight of the flat panel display remote-controlled viewing angle adjustment system  1  and the flat panel display  9  and the moment that it generates and which is exerted on the support assembly  2  during the rotation can be as low as possible. 
       FIG. 7  shows a third embodiment of the flat panel display remote-controlled viewing angle adjustment system  10 . The structures of the support assembly  2 , the first driving mechanism  25 , the second driving mechanism  26 , the first control unit  27 , and the second control unit  29  are identical to those of the first embodiment. The difference between the first embodiment and the third embodiment is that the first electrical stopper  31  and the second electrical stopper  32  of the first embodiment are replaced with a rotation control mechanism  30 . The rotation control mechanism  30  comprises a base support extension  301 , a display support extension  305 , a first link  302 , and a second link  304 . The base support extension  301  is attached to the base support panel member  21  and the display support extension  305  is attached to the display support panel member  23 . Further, the left end of the first link  302  is pivotally connected to the left end of the base support extension  301  and the right end of the first link  302  is pivotally connected to the right end of the display support extension  305 , and the left end of the second link  304  is pivotally connected to the left end of the display support extension  305  and the right end of the second link  304  is pivotally connected to the right end of the base support extension  301 . 
       FIGS. 8A-8D  show an operating process of the third embodiment of the present invention. As shown in  FIG. 8A , when the flat panel display remote-controlled viewing angle adjustment system  10  is at the initial position, the base support panel member  21 , the second support panel member  213 , and the fourth support panel member  211  form one plane, and the display support panel member  23 , the first support panel member  233 , and the third support panel member  231  form another plane parallel to and directly in front of the former plane. At this position, the first positioning switch  271  and second positioning switch  291  are in the “on” mode, and the first limit switch  272  and the second limit switch  292  are in the “off” mode. As shown in  FIGS. 8B and 8C , when the first driving mechanism  25  is started, the motor  251  will drive the second support panel member  213  to rotate clockwise about the pivot joint of the second support panel member  213  and the base support panel member  21 . The first positioning switch  271  will thus be turned off, and the display support panel member  23  as well as the third support panel member  231  will rotate clockwise about the pivot joint of the third support panel member  231  and the fourth support panel member  211 . Therefore, the flat panel display  9  supported on the display support panel member  23  will rotate substantially about its left edge as shown in  FIGS. 8A-8D . 
     When the first driving mechanism  25  continues to drive the second support panel member  213  to rotate clockwise, the display support panel member  23  and the third support panel member  231  will rotate clockwise about the pivot joint of the third support panel member  231  and the fourth support panel member  211  and the display support extension  305  of the rotation control mechanism  30  will rotate clockwise about its left end. Therefore, the flat panel display  9  supported at the display support panel member  23  will rotate substantially about its left edge. 
     When the flat panel display remote-controlled viewing angle adjustment system  10  is rotated to a predetermined angular position (as shown in  FIG. 8D ), the first limit switch  272  will be turned on and the motor  251  will stop, and so will the second support panel member  213 . 
     In the mode that the first limit switch  272  is turned on, if the first driving mechanism  25  is started once more, the motor  251  will only rotate counter-clockwise. The first driving mechanism  25  will drive the second support panel member  213  to rotate counter-clockwise about the pivot joint of the second support panel member  213  and the base support panel member  21 . When the second support panel member  213  is driven to rotate counter-clockwise, the first limit switch  272  will be turned off. Thus, the display support panel member  23  and the third support panel member  231  will rotate counter-clockwise about the pivot joint of the third support panel member  231  and the fourth support panel member  211 . As that rotation continues, the flat panel display remote-controlled viewing angle adjustment system  10  will rotate back to the initial position as shown in  FIG. 8A , and the first the positioning switch  271  is turned on, and thus the motor  251  will stop. 
       FIGS. 9A-9D  show another operating process of the second embodiment of the present invention. As shown in  FIG. 9A , when the flat panel display remote-controlled viewing angle adjustment system  10  is at the initial position, the base support panel member  21 , the second support panel member  213 , and the fourth support panel member  211  form one plane, and the display support panel member  23 , the first support panel member  233 , and the third support panel member  231  form another plane parallel to and directly in front of the former plane. At this position, the first positioning switch  271  and second positioning switch  291  are in the “on” mode, and the first limit switch  272  and the second limit switch  292  are in “off” mode. As shown in  FIGS. 9B and 9C , when the second driving mechanism  26  is started, the motor  261  will drive the fourth support panel member  211  to rotate counter-clockwise about the pivot joint of the fourth support panel member  211  and the base support panel member  21 . The second positioning switch  291  will thus be turned off, and the display support panel member  23  as well as the first support panel member  233  will rotate counter-clockwise about the pivot joint of the first support panel member  233  and the second support panel member  213 . Therefore, the flat panel display  9  supported on the display support panel member  23  will rotate substantially about its right edge as shown in  FIGS. 9A-9D . 
     When the second driving mechanism  26  continues to drive the fourth support panel member  211  to rotate counter-clockwise, the display support panel member  23  and the first support panel member  233  will rotate counter-clockwise about the pivot joint of the first support panel member  233  and the second support panel member  213  and the display support extension  305  of the rotation control mechanism  30  will rotate counter-clockwise about its right end. Therefore, the flat panel display  9  supported on the display support panel member  23  will rotate substantially about its right edge. 
     When the flat panel display remote-controlled viewing angle adjustment system  10  is rotated to a predetermined angular position (as shown in  FIG. 9D ), the second limit switch  292  is turned on and the motor  261  will stop, and so will the fourth support panel member  211 . 
     In the mode that the first limit switch  292  is turned on, if the second driving mechanism  26  is started once more, it will only rotate clockwise. The second driving mechanism  26  will drive the fourth support panel member  211  to rotate clockwise about the pivot joint of the fourth support panel member  211  and the base support panel member  21 . When the fourth support panel member  211  is driven to rotate clockwise, the second limit switch  272  will be turned off. Thus, the display support panel member  23  and the first support panel member  233  will rotate clockwise about the pivot joint of the first support panel member  233  and the second support panel member  213 . As that rotation continues, the flat panel display remote-controlled viewing angle adjustment system  10  will rotate back to the initial position as shown in  FIG. 9A , and the second positioning switch  291  is turned on, and thus the motor  261  will stop. 
       FIG. 10  shows a fourth embodiment of the flat panel display remote-controlled viewing angle adjustment system  10 . The structures of the support assembly  2 , the first driving mechanism  25 , the second mechanism  26 , the first control unit  27 , and the second control unit  29  are identical to those of the second embodiment. The difference between the second embodiment and the fourth embodiment is that the first electrical stopper  31  and the second electrical stopper  32  of the second embodiment are replaced with a rotation control mechanism  30 . The rotation control mechanism  30  comprises a base support extension  301 , a display support extension  305 , a first link  302 , and a second link  304 . The base support extension  301  is attached to the base support panel member  21  and the display support extension  305  is attached to the display support panel member  23 . Further, the left end of the first link  302  is pivotally connected to the left end of the base support extension  301  and the right end of the first link  302  is pivotally connected to the right end of the display support extension  305 , and the left end of the second link  304  is pivotally connected to the left end of the display support extension  305  and the right end of the second link  304  is pivotally connected to the right end of the base support extension  301 . 
       FIGS. 11A-11D  show an operating process of the third embodiment of the present invention. As shown in  FIG. 11A , when the flat panel display remote-controlled viewing angle adjustment system  10  is at the initial position, the base support panel member  21 , the second support panel member  213 , and the fourth support panel member  211  form one plane, and the display support panel member  23 , the first support panel member  233 , and the third support panel member  231  form another plane parallel to and directly in front of the former plane. At this position, the first positioning switch  271  and second positioning switch  291  are in the “on” mode, and the first limit switch  272  and the second limit switch  292  are in the “off” mode. As shown in  FIGS. 11B and 11C , when the first driving mechanism  25  is started, the motor  251  will drive the first support panel member  233  to rotate counter-clockwise about the pivot joint of the first support panel member  233  and the display support panel member  23 . The first positioning switch  271  will thus be turned off, and the display support panel member  23  as well as the third support panel member  231  will rotate clockwise about the pivot joint of the third support panel member  231  and the fourth support panel member  211 . Therefore, the flat panel display  9  supported on the display support panel member  23  will rotate substantially about its left edge as shown in  FIGS. 11A-11D . 
     When the first driving mechanism  25  continues to drive the first support panel member  233  to rotate counter-clockwise, the display support panel member  23  and the third support panel member  231  will rotate clockwise about the pivot joint of the third support panel member  231  and the fourth support panel member  211  and the display support extension  305  of the rotation control mechanism  30  will rotate clockwise about its left end. Therefore, the flat panel display  9  supported at the display support panel member  23  will rotate substantially about its left edge. 
     When the flat panel display remote-controlled viewing angle adjustment system  10  is rotated to a predetermined angular position (as shown in  FIG. 11D ), the first limit switch  272  will be turned on and the motor  251  will stop, and so will the second support panel member  213 . 
     In the mode that the first limit switch  272  is turned on, if the first driving mechanism  25  is started once more, the motor  251  will only rotate clockwise. The first driving mechanism  25  will drive the first support panel member  233  to rotate clockwise about the pivot joint of the first support panel member  233  and the display support panel member  23 . When the first support panel member  233  is driven to rotate clockwise, the first limit switch  272  will be turned off. Thus, the display support panel member  23  and the third support panel member  231  will rotate counter-clockwise about the pivot joint of the third support panel member  231  and the fourth support panel member  211 . As that rotation continues, the flat panel display remote-controlled viewing angle adjustment system  10  will rotate back to the initial position as shown in  FIG. 11A , and the first the positioning switch  271  is turned on, and thus the motor  251  will stop. 
       FIGS. 12A-12D  show another operating process of the fourth embodiment of the present invention. As shown in  FIG. 12A , when the flat panel display remote-controlled viewing angle adjustment system  10  is at the initial position, the base support panel member  21 , the second support panel member  213 , and the fourth support panel member  211  form one plane, and the display support panel member  23 , the first support panel member  233 , and the third support panel member  231  form another plane parallel to and directly in front of the former plane. At this position, the first positioning switch  271  and second positioning switch  291  are in the “on” mode, and the first limit switch  272  and the second limit switch  292  are in “off” mode. As shown in  FIGS. 12B and 12C , when the second driving mechanism  26  is started, the motor  261  will drive the third support panel member  231  to rotate clockwise about the pivot joint of the third support panel member  231  and the display support panel member  23 . The second positioning switch  291  will thus be turned off, and the display support panel member  23  as well as the first support panel member  233  will rotate counter-clockwise about the pivot joint of the first support panel member  233  and the second support panel member  213 . Therefore, the flat panel display  9  supported on the display support panel member  23  will rotate substantially about its right edge as shown in  FIGS. 12A-12D . 
     When the second driving mechanism  26  continues to drive the third support panel member  231  to rotate clockwise, the display support panel member  23  and the first support panel member  233  will rotate counter-clockwise about the pivot joint of the first support panel member  233  and the second support panel member  213  and the display support extension  305  of the rotation control mechanism  30  will rotate counter-clockwise about its right end. Therefore, the flat panel display  9  supported on the display support panel member  23  will rotate substantially about its right edge. 
     When the flat panel display remote-controlled viewing angle adjustment system  10  is rotated to a predetermined angular position (as shown in  FIG. 12D ), the second limit switch  292  is turned on and the motor  261  will stop, and so will the fourth support panel member  211 . 
     In the mode that the first limit switch  292  is turned on, if the second driving mechanism  26  is started once more, it will only rotate counter-clockwise. The second driving mechanism  26  will drive the third support panel member  231  to rotate counter-clockwise about the pivot joint of the third support panel member  231  and the display support panel member  23 . When the third support panel member  231  is driven to rotate counter-clockwise, the second limit switch  272  will be turned off. Thus, the display support panel member  23  and the first support panel member  233  will rotate clockwise about the pivot joint of the first support panel member  233  and the second support panel member  213 . As that rotation continues, the flat panel display remote-controlled viewing angle adjustment system  10  will rotate back to the initial position as shown in  FIG. 12A , and the second positioning switch  291  is turned on, and thus the motor  261  will stop. 
       FIG. 13  shows a fifth embodiment of the flat panel display remote-controlled viewing angle adjustment system  100 . The system  100  comprises a support assembly  2 ′, which further comprises a base support panel member  21 ′, a display support panel member  23 ′, a first support panel member  233 ′, and a second support panel member  213 ′. The base support panel member  21 ′ can be fixed to a support or on a wall and the display support panel member  23 ′ is to support a flat panel display  9 . The right edge of the base support panel member  21 ′ is pivotally connected to the left edge of the second support panel member  213 ′. The right edge of the display support panel member  23 ′ is pivotally connected to the left edge of the first support panel member  233 ′. Moreover, the right edge of the first support panel member  233 ′ is pivotally connected to the right edge of the second support panel member  213 ′. 
     Further, a rotation control mechanism  30  is attached to the support assembly  2 ′. The rotation control mechanism  30  comprises a base support extension  301 , a display support extension  305 , a first link  302  and, a second link  304 . The base support extension  301  is attached to the base support panel member  21 ′ of the support assembly  2 ′ and the display support extension  305  is attached to the display support panel member  23 ′ of the support assembly  2 ′. Further, the left end of the first link  302  is pivotally connected to the left end of the base support extension  301  and the right end of the first link  302  is pivotally connected to the right end of the display support mechanism  305 , and the left end of the second link  304  is pivotally connected to the left end of the display support extension  305  and the right end of the second link  304  is pivotally connected to the right end of the base support extension  301 . 
     A first driving mechanism  25 ′ is arranged substantially at the pivot joint of the base support extension  301  and the first link  302 . The first driving mechanism  25 ′ comprises a motor  251 ′ and a gear box  255 ′ for reducing the speed of the motor  251 ′. When the motor  251 ′ is started, the first driving mechanism  25 ′ will drive the first link  302  to rotate about the pivot joint of the base support extension  301  and the first link  302 . A first control unit  27 ′ is arranged substantially at the pivot joint of the base support extension  301  and the first link  302  and electrically connected to the first driving mechanism  25 ′. In particular, the first control unit  27 ′ is attached to the first driving mechanism  25 ′. Further, the first control unit  27 ′ comprises a first positioning switch  271 ′ and a first limit switch  272 ′. 
     A second driving mechanism  26 ′ is arranged substantially at the pivot joint of the base support extension  301  and the second link  304 . The second driving mechanism  26 ′ comprises a motor  261 ′ and a gear box  265 ′ for reducing the speed of the motor  261 ′. When the motor  261 ′ is started, the second driving mechanism  26 ′ will drive the second link  304  to rotate about the pivot joint of the base support extension  301  and the second link  304 . A second control unit  29 ′ is arranged substantially at the pivot joint of the base support extension  301  and the second link  304  and electrically connected to the second driving mechanism  26 ′. In particular, the second control unit  29 ′ is attached to the second driving mechanism  26 ′. Further, the second control unit  29 ′ comprises a second positioning switch  291 ′ and a second limit switch  292 ′. 
     Further, the first driving mechanism  25 ′ and the second driving mechanism  26 ′ can be remotely controlled. 
     In addition, the first positioning switch  271 ′ and the first limit switch  272 ′ cooperate with the motor  251 ′. When the first positioning switch  271 ′ or the first limit switch  272 ′ is turned on, the motor  251 ′ will stop. Likewise, the second positioning switch  291 ′ and the second limit switch  292 ′ cooperate with the motor  261 ′. When the second positioning switch  291 ′ or the second limit switch  292 ′ is turned on, the motor  261 ′ will stop. 
       FIGS. 14A-14D  show an operating process of the fifth embodiment of the present invention. As shown in  FIG. 14A , when the flat panel display remote-controlled viewing angle adjustment system  100  is at the initial position, the base support panel member  21 ′ and the second support panel member  213 ′ form one plane, and the display support panel member  23 ′ and the first support panel member  233 ′ form another plane parallel to and directly in front of the former plane. At this position, the first positioning switch  271 ′ and second positioning switch  291 ′ are in the “on” mode, and the first limit switch  272 ′ and the second limit switch  292 ′ are in the “off” mode. As shown in  FIGS. 14B and 14C , when the first driving mechanism  25 ′ is started, the motor  251 ′ will drive the first link  302  to rotate clockwise about the pivot joint of the base support extension  301  and the first link  302 . The first positioning switch  271 ′ will thus be turned off, and the display support extension  305  of the rotation control mechanism  30  will rotate clockwise about its left end. Therefore, the flat panel display  9  supported at the display support panel member  23 ′ will rotate about its left edge as shown in  FIGS. 14A-14D . 
     When the flat panel display remote-controlled viewing angle adjustment system  100  is rotated to a predetermined angular position (as shown in  FIG. 14D ), the first limit switch  272 ′ will be turned on and the motor  251 ′ will stop, and so will the second support panel member  213 ′. 
     In the mode that first limit switch  272 ′ is turned on, if the first driving mechanism  25 ′ is started once more, the motor  251 ′ will only rotate counter-clockwise. Thus, the first limit switch  272 ′ is turned off. Further, the first driving mechanism  25 ′ will drive the first link  302  to rotate counter-clockwise about the pivot joint of the base support extension  301  and the first link  302 . Thus, the display support extension  305  of the rotation control mechanism  30  will rotate counter-clockwise about its left end. Finally, the flat panel display remote-controlled viewing angle adjustment system  100  will rotate back into its initial position, and the first the positioning switch  271 ′ is turned on and the motor  251 ′ will stop. 
       FIGS. 15A-15D  show another operating process of the fifth embodiment of the present invention. As shown in  FIG. 15A , when the flat panel display remote-controlled viewing angle adjustment system  100  is at the initial position, the base support panel member  21 ′ and the second support panel member  213 ′ form one plane, and the display support panel member  23 ′ and the first support panel member  233 ′ form another plane parallel to and directly in front of the former plane. At this position, the first positioning switch  271 ′ and second positioning switch  291 ′ are in the “on” mode, and the first limit switch  272 ′ and the second limit switch  292 ′ are in the “off” mode. As shown in  FIGS. 15B and 15C , when the second driving mechanism  26 ′ is started, the motor  261 ′ is started and the second positioning switch  291 ′ is turned off. Further, the second driving mechanism  26 ′ will drive the second link  304  to rotate counter-clockwise about the pivot joint of the base support extension  301  and the second link  304 . The display support extension  305  of the rotation control mechanism  30  will rotate counter-clockwise about its right end. Therefore, the flat panel display  9  supported at the display support panel member  23 ′ will rotate about its right edge as shown in  FIGS. 15A-15D . 
     When the flat panel display remote-controlled viewing angle adjustment system  100  is rotated to a predetermined angular position (as shown in  FIG. 15D ), the second limit switch  292 ′ is turned on and the motor  261 ′ will be stop, and so will the first support panel member  233 ′ and the second support panel member  213 ′. 
     In the mode that the second limit switch  292 ′ is turned on, if the second driving mechanism  26 ′ is actuated once more, the motor  261 ′ will only rotate clockwise. Thus, the second limit switch  292 ′ will be turned off. The second link  304  will rotate clockwise about the pivot joint of the base support extension  301  and the second link  304 . Thus, the display support extension  305  of the rotation control mechanism  30  will rotate clockwise about its right end. Finally, the flat panel display remote-controlled viewing angle adjustment system  100  will rotate back into its initial position, and the second the positioning switch  291 ′ is turned on and the motor  261 ′ will stop. 
       FIG. 16  shows a sixth embodiment of the flat panel display remote-controlled viewing angle adjustment system  100 . The system  100  comprises a support assembly  2 ′, which further comprises a base support panel member  21 ′; a display support panel member  23 ′; a first support panel member  233 ′, and a second support panel member  213 ′. The base support panel member  21 ′ can be fixed to a support or on a wall and the display support panel member  23 ′ is to support a flat panel display  9 . The right edge of the base support panel member  21 ′ is pivotally connected to the left edge of the second support panel member  213 ′. The right edge of the display support panel member  23 ′ is pivotally connected to the left edge of the first support panel member  233 ′. Moreover, the right edge of the first support panel member  233 ′ is pivotally connected to the right edge of the second support panel member  213 ′. 
     Further, a rotation control mechanism  30 ′ is attached to the support assembly  2 ′. The rotation control mechanism  30 ′ comprises a base support extension  301 ′; a display support extension  305 ′; a first electromagnet  51  arranged at the left end of the base support extension  301 ′; a first attachment  52  rotatably arranged at the left end of the display support extension  305 ′ and used to be attached to the first electromagnet  51 ; a second electromagnet  53  arranged at the right end of the base support extension  301 ′; a second attachment  54  rotatably arranged at the right end of the display support extension  305 ′ and used to be attached to the second electromagnet  51 ; and a control unit (not shown) electrically connected to the two electromagnets  51 ,  53 . Moreover the base support extension  301 ′ is attached to the base support panel member  21 ′ of the support assembly  2 ′ and the display support extension  305 ′ is attached to the display support panel member  23 ′ of the support assembly  2 ′. 
     A driving mechanism  25  is arranged substantially at the pivot joint of the first support panel member  233 ′ and the second support panel member  213 ′. The driving mechanism  25 ″ comprises a motor  251 ″ and a gear box  255 ″ for reducing the speed of the motor  251 ″. When the motor  251 ″ is started, the driving mechanism  25 ″ will drive the first support panel member  233 ′ to rotate about the pivot joint of the first support panel member  233 ′ and the second support panel member  213 ′. Further, the driving mechanism  25 ″ can be remotely controlled. 
       FIGS. 17A-17D  show an operating process of the sixth embodiment of the present invention. As shown in  FIG. 17A , when the flat panel display remote-controlled viewing angle adjustment system  100  is at the initial position, the electromagnets  51  and  53  are in an unactivated state, and the base support panel member  21 ′ and the second support panel member  213 ′ form one plane, and the display support panel member  23 ′ and the first support panel member  233 ′ form another plane parallel to and directly in front of the former plane. As shown in  FIGS. 17B-17D , when the driving mechanism  25 ′ is started, the control unit will only activate the first electromagnet  51  to attach to the first attachment  52  so as to form a left pivot joint of the rotation control mechanism  30 ′. Further, the motor  251 ″ will drive the first support panel member  233 ′ such that the display support extension  305 ′ rotates clockwise about the left pivot joint of the rotation control mechanism  30 ′. Therefore, the flat panel display  9  supported at the display support panel member  23 ′ will rotate about its left edge as shown in  FIGS. 17A-17D  to a predetermined angular position (as shown in  FIG. 17D ). 
     When the flat panel display remote-controlled viewing angle adjustment system  100  is rotated to a predetermined angular position (as shown in  FIG. 17D ), the user can control the motor  251 ″ to rotate reversely such that the flat panel display remote-controlled viewing angle adjustment system  100  rotates back into its initial position. Once the flat panel display remote-controlled viewing angle adjustment system  100  at its initial position, the first electromagnet  51  will return to an unactivated state. 
       FIGS. 18A-18D  show another operating process of the sixth embodiment of the present invention. As shown in  FIG. 18A , when the flat panel display remote-controlled viewing angle adjustment system  100  is at the initial position, the electromagnets  51  and  53  are in an unactivated state, and the base support panel member  21 ′ and the second support panel member  213 ′ form one plane, and the display support panel member  23 ′ and the first support panel member  233 ′ form another plane parallel to and directly in front of the former plane. As shown in  FIGS. 18B-18D , when the driving mechanism  25 ′ is started, the control unit will activate the second electromagnet  53  to attach to the second attachment  54  so as to form a right pivot joint of the rotation control mechanism  30 ′. Further, the motor  251 ″ will drive the first support panel member  233 ′ such that the display support extension  305 ′ rotates counter-clockwise about the right pivot joint. Therefore, the flat panel display  9  supported at the display support panel member  23 ′ will rotate about its right edge as shown in  FIGS. 18A-18D  to a predetermined angular position (as shown in  FIG. 18D ). 
     When the flat panel display remote-controlled viewing angle adjustment system  100  is rotated to a predetermined angular position (as shown in  FIG. 18D ), the user can control the motor  251 ″ to rotate reversely such that the flat panel display remote-controlled viewing angle adjustment system  100  rotates back into its initial position. Once the flat panel display remote-controlled viewing angle adjustment system  100  is at its initial position, the second electromagnet  53  will return to an unactivated state. 
     The invention may also be implemented in other specific modes without departing from the spirit of the invention. Thus, the above-mentioned embodiments shall be regarded as explanatory but not restrictive. All changes that are consistent with the meaning and range of the claims and the equivalents shall fall within the scope claimed by the invention.