KR100926912B1 - Display devices - Google Patents

Abstract

The present invention relates to a display device and a power transmission device, and more particularly, to a stand of the display device to adjust the viewing angle of the display device, and a power transmission device for transmitting a rotational force.

In the present invention, the drive motor formed in the rotary drive unit located inside the display stand rotates the display device by rolling motion with respect to the rotating plate. Therefore, a device such as a gear or the like for separately switching the driving force of the motor is not required, so that the generation of noise is significantly reduced.

Display appliance, stand

Description

Display device

1 is a perspective view of a display device according to an embodiment of the present invention.

2 is an exploded perspective view of a display device stand according to the first embodiment of the present invention.

3 is a longitudinal sectional view of the stand;

4 is a perspective view showing a state in which the upper cover of the stand according to the first embodiment of the present invention is removed.

5 is an enlarged perspective view of a portion A of FIG. 4.

6 is a perspective view of a stopper formed in the stand of the display device according to the first embodiment of the present invention.

7 is a perspective view illustrating a structure of a rotation sensing unit provided in a stand of a display device according to a first embodiment of the present invention.

8 is a partial cross-sectional view showing the structure of a display device stand according to a second embodiment of the present invention.

9 is a partial cross-sectional view showing the structure of a display device stand according to a third embodiment of the present invention.

10 is an internal perspective view illustrating a stand structure of a display device according to a fourth exemplary embodiment of the present invention.

11 is a longitudinal sectional view of the stand;

12 is an internal perspective view illustrating a stand structure of a display device according to a fifth exemplary embodiment of the present invention.

13 is a longitudinal sectional view of the stand;

The present invention relates to a display device, and more particularly, to a stand of a display device to adjust the viewing angle of the display device.

The display device is a device in which a user views a screen displayed on an image module. In recent years, a flat display device using a plasma method (PDP) or a liquid crystal display method (LCD) has been introduced from a conventional cathode ray tube method (CRT) and has a thin flat surface, which is light in weight and excellent in image quality.

The flat panel display devices (PDP, LCD) have a light weight, which allows the user to move conveniently. In addition, this advantage is further clarified by being able to rotate the flat panel display device according to the position where the user is placed. Of course, the conventional display device to which the cathode ray tube is applied can be increased by adjusting the viewing angle, but the rotation is not easy because the weight is heavy and not easy to move. However, the spirit of the present invention is not limited to the flat display device, but is more preferably applied to the flat display device having a relatively light weight.

Conventionally, there is a method of rotating the display device by providing a swivel hinge at the bottom of the display device so that the base and the display device rotate relative to each other by the hinge. However, this method is not preferable because the display device can be rotated only when a user applies force. In view of such a user inconvenience, a device capable of automatically rotating a display device has recently been introduced.

In such a rotating device, a device using a motor and a gear is mainly introduced as a device capable of rotating a display device in left and right directions.

In detail, the stand of the display apparatus to be introduced adopts a method in which a driving motor is connected to a gear to rotate the rotating plate for rotation of the display apparatus, and noise is generated at a connection portion between the gears during the rotation operation. Until now, such noise has not caused much inconvenience to consumers. However, in light of the recent trend of demanding high-quality home appliances, there is a problem that the noise during operation of the stand causes discomfort to the display device user, and there is a problem that the rotation speed is insufficient due to the deceleration according to the gear ratio during the rotation. .

The present invention is proposed in order to solve the above problems, and dramatically reduces the generation of noise generated during the rotation of the display device, and proposes a display device stand of a more productive and reliable configuration.

In addition, the present invention proposes a display device stand having a configuration in which a rotational force is generated from a rotation driving unit of the display device stand and then transmitted to a rotating body to enable design and production regardless of the size of the display device.

In addition, a display device stand is proposed in which the viewing angle of the display device can be optimally set to an appropriate angle.

In addition, in the rotational drive of the display device, a display device stand that is stable even when the display device is not rotated by external forces or obstacles despite the rotational operation of the user is proposed.

According to an aspect of the present invention, a display device includes: a display module; A stand supporting the load of the display module and causing rotation of the display module; wherein the stand includes a lower cover, an upper cover covering the lower cover and integrally rotating with the display module; A drive motor is provided for providing a rotational force to the upper cover, wherein the upper cover is in direct or indirect contact with the rotation axis of the drive motor, characterized in that it rotates on an imaginary surface including a contact surface with the rotation axis.

In addition, the display device according to the spirit of the present invention, a display module; A stand supporting the load of the display module; And a support for connecting the display module and the stand, wherein the support covers a lower cover seated on an installation surface, an upper opening of the lower cover, and is connected to a point spaced a predetermined distance from a center. The upper cover, a friction plate fixed to the lower cover, a drive motor on which a rotating shaft is seated on an upper surface of the friction plate, a motor support plate on which the drive motor is seated, and a support part mounted on the motor support plate to support the upper cover. Included.

In addition, the display device according to the spirit of the present invention, a display module; A stand supporting the load of the display module; And a support for connecting the display module and the stand, wherein the support covers a lower cover seated on an installation surface, an upper opening of the lower cover, and is connected to a point spaced a predetermined distance from a center. An upper cover, one or more drive motors fixed inside the stand, a first rotating plate rotating in contact with a rotating shaft of the driving motor, and receiving rotational force from the first rotating plate to be integral with the upper cover A rotating second rotating plate is included.

Those skilled in the art who understand the spirit of the present invention can easily suggest other embodiments falling within the scope of the same spirit by adding, changing, deleting, and adding components. However, this will also be included within the scope of the present invention.

Hereinafter, with reference to the drawings will be described in detail a specific embodiment of the present invention.

1 is a perspective view of a display device according to an embodiment of the present invention.

Referring to FIG. 1, the display device 1 according to the present invention includes a display module 10, a stand 30 for supporting a load of the display module 10, the display module 10, and the display module 10. A support 20 for interconnecting the stand 30 is included. The stand 30 may include an operation unit for allowing a user to manipulate a signal for rotating the display module 10, and may transmit an operation signal of the display device 1 through a remote controller from the outside.

In detail, a user may input a rotation signal of the display device 1 through an operation unit attached to the stand 30, or input a rotation signal from the outside of the stand 30 through a remote controller. By the manipulation of the user, the rotary driving unit (to be described later) included in the stand 30 is operated, and thus the display module 10 is rotated in the left and right directions.

<First Embodiment>

2 is an exploded perspective view of a display device stand according to a first embodiment of the present invention, Figure 3 is a longitudinal sectional view of the stand.

2 and 3, the display device stand 30 according to the present invention includes a case including a lower cover 31 and an upper cover 37 covering the lower cover 31 and provided inside the case. Drive means is included.

in detail. The support 20 extends upward from one side of the upper cover 37, and the support 20 and the upper cover 37 are rotated in one body by the driving means.

More specifically, the drive means includes a friction plate 32 seated on the inner edge of the lower cover, a rotation plate 36 provided on the upper side of the friction plate 32, and a drive motor for providing rotational force to the rotation plate 36. 34 and a motor support plate 33 on which the drive motor 34 is seated.

A rotating shaft 341 extending from the drive motor 34 is interposed between the friction plate 32 and the rotating plate 36 to cause the rotating plate 36 to rotate. In addition, the support part 35 may be provided on an upper side of the motor support plate 33 between the drive motors 34. The support part 35 may support the load of the upper cover 37 and the display module 10 according to the structural change of the stand 30. This will be described in detail with reference to the accompanying drawings.

In addition, the rotating plate 36 is fixed to the bottom of the upper cover 37 by a fastening member, and the friction plate 32 is fixed to the bottom surface of the lower cover 31. The friction plate 32 and the rotating plate 36 form an annular ring shape having a predetermined width.

Meanwhile, a connection member 38 supporting a load of the display module 10 and connecting the upper cover 31 and the lower cover 37 is provided at the center of the lower cover 31.

In detail, the connection member 38 includes a lower connection member 382 fixed to the central surface of the lower cover 31 and an upper connection member 381 fixed to the central surface of the upper cover 37. do. In addition, the upper connection member 381 is rotatably coupled to the lower connection member 382 by a fastening means such as a screw. In addition, both ends of the upper connection member 381 and the lower connection member 382 are fixed to the upper cover 31 and the lower cover 37, respectively. The upper connection member 381 and the lower connection member 382 are coupled in a symmetrical direction. The connecting member 38 is not limited to the embodiment shown, but may be provided in various shapes. That is, a pair of rod-shaped connecting means may be upright so that one end is fixed to the upper cover 31 and the lower cover 37, respectively, and the other ends are rotatably connected to each other.

In addition, the side portion of the lower cover 31 is provided with an operation unit 311 or a remote control unit 312 for allowing a user to input the rotation drive signal to the stand (30). In addition, a power supply unit 39 is provided inside the lower cover 31 to supply power to the driving motor 34, the operation unit 311, and the remote control unit 312.

In addition, the upper connecting member 381 and the lower connecting member 382 may be inserted into a mechanical element such as a bearing so that the rotation of the upper cover 37 can be made smoothly in a low noise or no noise state.

4 is a perspective view illustrating a state in which the top cover of the stand according to the first embodiment of the present invention is removed, and FIG. 5 is an enlarged perspective view of part A of FIG. 4.

4 and 5, the motor support plate 33 may have an annular annular shape having a predetermined width, and an outer diameter thereof may be smaller than an inner diameter of the friction plate 32.

In detail, a plurality of drive motors 34 are seated on the upper surface of the motor support plate 33 at predetermined intervals. In addition, the rotation shaft 341 of the driving motor 34 is seated on the upper surface of the friction plate 32. The drive motor 34 is firmly fixed to the motor support plate 33 by a motor cover 342 that surrounds the outer circumferential surface of the drive motor 34 and both ends thereof are fixed to the motor support plate 33. When the fastening of the driving motor 34 is incomplete, since the rotational force of the rotating shaft 341 is dispersed, the rotation of the rotating plate 36 may not be smooth and noise may occur.

On the other hand, the magnitude of the rotation force for the rotation of the display device 1 should be increased in proportion to the load of the display device (1). Therefore, a predetermined number of drive motors 34 are installed in consideration of the internal space of the stand 30 and the rotational speed of the stand 30. In addition, the plurality of driving motors 34 may be connected in parallel to the power supply unit 37 to supply power.

In addition, the friction plate 32 is made of a material having a predetermined coefficient of friction, and is fastened to the lower cover 31 in a stationary state with respect to the ground. The friction plate 32 is in contact with the rotary shaft 341 of the drive motor 34 to cause the rolling motion of the rotary shaft 341. That is, the rotary shaft 341 is rolled along the friction plate 32 so that the rotary plate rotates. In addition, the rotating plate 36 is seated on an upper side of the rotating shaft 341. That is, the load of the display module 10 acts on the rotation shaft 341. In addition, in the case where there are a plurality of driving motors 34, the load of the display module 10 may be divided evenly on the plurality of rotation shafts 341.

In detail, when the rotary shaft 341 rotates while the rotary plate 36 and the friction plate 32 are in contact with the surface of the rotary shaft 341, the motor support plate 33 rotates. That is, the rotation shaft 341 moves along the upper surface of the friction plate 32 by the friction force between the rotation shaft 341 and the friction plate 32. In addition, the rotating plate 36 in contact with the upper side of the rotating shaft 341 is also rotated with the rotating shaft 341. Therefore, the rotational speed of the rotating plate 36 is twice the rotational speed of the motor support plate 33. This is the same principle as a passenger moving in a moving bus at the same direction as the bus's moving direction and at the same speed as the moving speed of the bus. In addition, since the rotating plate 36 is integrally coupled with the upper cover 37, the display module 10 rotates together with the rotating plate 36.

6 is a perspective view of a stopper formed in the stand of the display device according to the first embodiment of the present invention.

Referring to FIG. 6, a stopper guide 313 is provided inside the lower cover 31, specifically, inside the motor support plate 33. The stopper 315 is seated on the stopper guide 313. The stopper 315 extends to the outside of the lower cover 31. In addition, another stop protrusion 331 that is caught by the stopper 315 is formed on the upper surface of the motor support plate 33. In addition, the stop protrusion 331 is provided between the driving motor 34 and extends in the center direction of the lower cover 31. Therefore, when the stopper 315 contacts the stop protrusion 331, the rotation of the display module 10 is blocked.

On the other hand, a contact sensor (not shown) may be attached to the stopper 315 to determine the operating status of the stopper 315. That is, when the stop protrusion 352 is in contact with the stopper 315, the stop signal 352 may be configured to transmit a contact signal detected by the touch sensor to the controller so as not to cause excessive rotational driving.

Alternatively, in addition to the touch sensing sensor, various types of sensors are adopted, which may be configured using an optical method or an optical sensor, which is generally configured to sense whether another member is contacted using current or voltage. Can be.

7 is a perspective view illustrating a structure of a rotation sensing unit provided in a stand of a display device according to a first embodiment of the present invention.

Referring to FIG. 7, the rotation detecting unit 40 detecting whether the display module 10 is rotated includes a photo coupler 41 and a wheel 43, and the photo coupler 41 includes a lower cover 31. It is fixed to). The wheel 43 is interposed between the lower connection member 382 and the upper connection member 381, and is coupled to the upper connection member 381 to rotate together with the upper cover 37.

In addition, the light coupler 411 and the light receiver 413 are formed to be spaced apart from the photo coupler 41 by a predetermined interval, and the edge portion of the wheel 43 is inserted into a space between the light emitter 411 and the light receiver 413. do. A plurality of recesses 431 are formed on the outer circumferential surface of the wheel 43 to form a light path of light emitted from the light emitting part 411. In addition, a plurality of recesses 431 are formed at predetermined intervals, so that the number of on / off of the optical signal is sensed as the wheel 43 rotates.

In addition, the photocoupler 41 is connected to a rotation controller (not shown) to transmit and receive an electrical signal. The rotation controller is a control circuit composed of a PCB substrate, and controls the photo coupler 41 as an electrical signal. The photocoupler 41 is a component for transmitting an electrical signal through an optical signal. The photocoupler 41 transmits an optical signal by a light emitting diode in the light emitting unit 411 and receives it by the light receiving unit 413. The received optical signal is restored to an electrical signal by the phototransistor.

On the other hand, the wheel 43, which has a recessed portion formed therein, rotates to pass between the light emitting portion 411 and the light receiving portion 413 of the photocoupler 41. In addition, the rotation controller detects the on / off of the optical signal, and determines that the display module 10 is rotated to a range outside the desired viewing angle when the phenomenon in which the optical signal is periodically turned on / off is stopped. In addition, control such as stopping the current rotation or rotating in the direction opposite to the current rotation direction is possible.

Second Embodiment

8 is a partial cross-sectional view showing the structure of a display device stand according to a second embodiment of the present invention.

In this embodiment, the rotating plate 36 presented in the first embodiment is characterized in that it is formed integrally with the upper cover 37.

Referring to FIG. 8, a pressing part 371 for pressing the rotary shaft 341 of the driving motor 34 protrudes from the bottom of the edge portion of the upper cover 37. That is, the pressing portion 371 which performs the function of the rotating plate 36 in the first embodiment is formed in one body with the upper cover 37. Then, since the operation of combining the rotating plate 36 and the upper cover 37 by using a separate fastening member is unnecessary, there is an effect of reducing the work process and manufacturing cost.

Third Embodiment

9 is a partial cross-sectional view showing the structure of a display device stand according to a third embodiment of the present invention.

In the first embodiment, the self-weight of the display module 10 is configured to act on the rotational shaft 341 of the drive motor 34. However, in the present embodiment, the self-weight of the display module 10 is located at the upper end of each support part 35. It was proposed to work. That is, the rotating plate 36 presented in the first embodiment is removed.

Referring to FIG. 9, the weight of the display module 10 is transmitted to the upper cover 37 which is fastened to the support 20 through the support 20 which is fastened to the display module 10. The weight of the display module 10 thus transferred is distributed to a predetermined number of supports 35.

Accordingly, the load F of the display module 10 transmitted to the support part 35 is transmitted to the motor support plate 33, and the load transmitted to the motor support plate 33 surrounds the drive motor 34. It is delivered to the motor cover 342. Then, the load is transmitted to the motor cover 342, and eventually the load F of the display module 10 is transmitted to the rotation shaft 341 of the driving motor 34 to pressurize the friction plate 32. do. Then, when the driving motor 34 operates, the rotation shaft 341 of the driving motor 34 rotates to generate rolling motion with respect to the friction plate 32. This rolling motion results in an action-reaction effect by the frictional force, causing the top cover 37 to rotate. Therefore, the display module 10 rotates in the left and right directions by the rotation force generated by the above process.

In addition, the support part 35 is fastened to the motor support plate 33 so that the plurality of support parts 35 are uniformly disposed on the motor support plate 33. In this case, there is an advantage of minimizing noise and vibration when the display apparatus 1 is rotated. The support part 35 guides the rotation of the upper cover 37 so that the display module 10 rotates more smoothly and quietly.

Fourth Embodiment

FIG. 10 is an internal perspective view illustrating a stand structure of a display device according to a fourth exemplary embodiment of the present invention, and FIG. 11 is a longitudinal cross-sectional view of the stand.

In the first to third embodiments, the motor support plate on which the driving motor is seated is rotated, whereas the present embodiment is a structure for rotating the display module 10 while the motor support plate is fixed to the lower cover. It features.

 10 and 11, the stand 50 according to the embodiment of the present invention has a structure of the lower cover 51 and the upper cover 58, the motor support plate 55 and the drive motor 56. Same as the embodiment.

However, only the second rotating plate 52 is provided at the inner edge of the lower cover 51, and the friction plate of the first embodiment has a structure of being removed. The motor support plate 55 is fixed to the bottom surface of the lower cover 51. The base 53 is interposed below the rotation shaft of the drive motor 56, and the first rotation plate 54 is seated above the rotation shaft. The upper surface of the base 53 and the lower surface of the first rotating plate 54 are in close contact with the rotation shaft of the driving motor 56, respectively. The base 53 is rotatably coupled to the bottom surface of the lower cover 51. Rotation guide means such as a bearing 59 may be provided between the base 53 and the lower cover 51 to allow the base 53 to rotate. The rotary guide means is not limited to the bearing 59, and a circular rib is formed on one side of the base 53 and the lower cover 51, and a groove on which the rib is accommodated is formed on the other side. There will be. That is, the base 53 may be smoothly rotated at the bottom surface of the lower cover 51 by the uneven coupling.

In addition, a pulley 57 is provided between the first rotating plate 54 and the second rotating plate 52 to transmit the rotational force of the first rotating plate 54 to the second rotating plate 52. In addition, a bearing 59 is also provided between the bottom surface of the second rotating plate 52 and the lower cover 51 to allow the second rotating plate 52 to rotate smoothly. In addition, an upper surface of the second rotating plate 52 is fixed to the upper cover 58.

By the above configuration, when the rotation shaft of the drive motor 56 is rotated, the base 53 and the first rotating plate 54 is rotated in the opposite direction. When the first rotating plate 54 rotates, the pulley 57 and the second rotating plate 52 rotate together, and the first rotating plate 54 and the second rotating plate 52 rotate in opposite directions. do.

Fifth Embodiment

12 is an internal perspective view illustrating a stand structure of a display device according to a fifth embodiment of the present invention, and FIG. 13 is a longitudinal cross-sectional view of the stand.

In the present embodiment, the structure is the same as the fourth embodiment, it characterized in that the first rotary plate and the second rotary plate is geared to rotate relative.

12 and 13, a stand 60 according to an embodiment of the present invention has a structure of a lower cover 61, an upper cover 67, a motor support plate 65, a drive motor 66, and a base 63. Is the same as that of the fourth embodiment.

However, the first rotary plate 64 and the second rotary plate 62 is different from the fourth embodiment in gear coupling. In addition, the bearings 68 are provided at the lower ends of the base 63 and the second rotating plate 62, respectively, as in the fourth embodiment. Furthermore, since the first rotating plate 64 and the second rotating plate 62 are gear-coupled, it is natural that the pulley structure shown in the fourth embodiment is not necessary. In addition, the gear may be formed only on the surface in contact with the first rotating plate 64.

Operation of the stand is the same as in the fourth embodiment, and thus a detailed description thereof will be omitted.

Here, by reducing the thickness of the second rotating plate (52,62) presented in the fourth embodiment and the fifth embodiment and to provide a separate fixed base on the lower side, the rotational force transmitted from the first rotating plate (54,64) It can prevent the loss.

In detail, in the fourth and fifth embodiments, the lower end of the second rotating plate is in close contact with the lower covers 51 and 61 and the upper end is coupled to the upper covers 58 and 67. Here, the thickness of the second rotating plate (52, 62) can be reduced to about half, and a separate base may be further provided on the lower side. And, the base is fixed to the lower cover (51, 61), the bearing is interposed between the base and the rotating plate (52, 62), so that the weight of the second rotating plate is reduced. Then, the rotational force transmitted from the first rotating plate (54,64) is lost due to the difference in weight with the second rotating plate, or the first rotating plate (54,64) does not rotate smoothly and the rotation axis of the drive motor is idle The phenomenon may be reduced.

In the present invention, the drive motor formed in the rotary drive unit located inside the display stand rotates the display device by rolling motion with respect to the rotating plate. Therefore, a device such as a gear or the like for separately switching the driving force of the motor is not required, so that the generation of noise is significantly reduced. This satisfies the user's preference of the more sensitive in recent years with respect to the noise, and has the advantage of solving the complaints caused by the noise in the operation of the display device stand, such as late night time.

In addition, there is an advantage that the cost of the product is reduced because it does not use an article such as an expensive gear box.

In addition, since the driving speed of the motor is not reduced, and is directly transmitted to the display stand module, the display device can be rotated at a desired angle more quickly.

In addition, although the degree of rotation of the display device may be freely set through the display stand, in consideration of the effective viewing angle of the flat panel display device, a predetermined number of stoppers are installed at a predetermined position in the display stand so that the display stand is positioned at a predetermined point. This has the advantage of allowing the user to watch the optimal screen.

In addition, since the first rotating body can be rotated by the rotational force obtained from the driving motor unit and the second rotating body can be rotated through a power transmission member such as a roller or gear, the size of the display device to be rotated. Therefore, there is an advantage in that a display device stand can be implemented to be suitable for load.

Claims (22)

Display module; And a stand supporting the load of the display module and causing rotation of the display module. On the stand, With the lower cover, An upper cover covering the lower cover and integrally rotating with the display module; It includes a drive motor for providing a rotational force to the upper cover, And the upper cover is in direct or indirect contact with the rotating shaft of the drive motor, and rotates on a virtual surface including a contact surface with the rotating shaft. The method of claim 1, And a plurality of driving motors are arranged radially inside the lower cover. The method of claim 1, And a friction plate provided in contact with the lower side of the rotating shaft. The method of claim 3, wherein And a rotating plate coupled to the lower side of the upper cover and rotating in contact with the rotating shaft. The method of claim 3, wherein And a pressing portion extending from a bottom surface of the edge portion of the upper cover to contact the rotating shaft. The method of claim 1, A motor support plate on which the drive motor is mounted is further included on an upper surface, The motor support plate is rotated by the rolling motion of the rotating shaft display device. The method of claim 1, And a connection member provided inside the stand and configured to rotatably connect the upper cover to the lower cover. The method of claim 1, And a rotation sensing unit provided inside the stand to sense an amount of rotation of the display module. The method of claim 8, The rotation detection unit, A photo coupler fixed to one side of the stand; A wheel that rotates with the top cover is included, The photo coupler is provided with a light emitting portion and a light receiving portion, And the wheel passes between the light emitting unit and the light receiving unit. The method of claim 1, And a rotation limiting unit provided inside the stand to limit the amount of rotation of the display module. The method of claim 10, The rotation limiting portion, A stopper fixed to the lower cover; And a stopper that rotates together with the drive motor and interferes with the stopper. Display module; A stand supporting the load of the display module; Includes; support for connecting the display module and the stand, On the stand, Lower cover seated on the mounting surface, An upper cover covering an upper opening of the lower cover and having the support connected to a point spaced a predetermined distance from a center; A friction plate fixed to the lower cover, A drive motor having a rotating shaft seated on an upper surface of the friction plate; A motor support plate on which the drive motor is seated; And a support part mounted on the motor support plate to support the upper cover. The method of claim 12, And the motor support plate and the upper cover rotate integrally as the rotation shaft rolls on the upper surface of the friction plate. The method of claim 12, And an upper surface of the support portion is fixedly coupled to the upper cover. The method of claim 12, And a load of the display module transmitted to the support part is transmitted to the friction plate through the rotation shaft of the drive motor. The method of claim 12, And the motor support plate is spaced apart from the bottom surface of the lower cover. The method of claim 12, And a plurality of the driving motors are radially arranged. Display module; A stand supporting the load of the display module; Includes; support for connecting the display module and the stand, On the stand, Lower cover seated on the mounting surface, An upper cover covering an upper opening of the lower cover and having the support connected to a point spaced a predetermined distance from a center; One or more drive motors fixed within the stand; A first rotating plate rotating in contact with the rotating shaft of the drive motor; And a second rotating plate which receives rotational force from the first rotating plate and rotates integrally with the upper cover. The method of claim 18, And a base provided on an opposite surface of the first rotating plate and rotating in contact with the rotating shaft of the driving motor. The method of claim 18, And a pulley interposed between the first rotating plate and the second rotating plate to transfer the rotational force of the first rotating plate to the second rotating plate. The method of claim 18, Display device, characterized in that the outer peripheral surface of the first rotating plate and the inner peripheral surface of the second rotating plate is geared. The method of claim 18, And a plurality of the driving motors are arranged radially.

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