KR20200074515A - Flat/curved variable display device - Google Patents

Abstract

The present invention relates to a flat/curved variable display device that can be used by switching between a flat mode and a curved mode. The flat/curved variable display device comprises: a display module that displays an image; and a plurality of electromagnet blocks and a plurality of permanent magnet blocks which are alternately arranged on front and rear surfaces of upper and lower bezel regions of the display module to be varied in the flat mode and the curved mode.

Description

Flat/curved variable display device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a flat panel/curved surface variable display device that can be used in a variety of flat and curved modes.

As the information society develops and various portable electronic devices such as mobile communication terminals and notebook computers develop, the demand for a flat panel display device that can be applied thereto is gradually increasing.

As such a flat panel display, an OLED display using a liquid crystal display (LCD) using liquid crystal and an organic light emitting diode (OLED) is used.

These flat panel display devices include a display panel having a plurality of gate lines and a plurality of data lines to display an image, and a driving circuit for driving the display panel.

Among the display devices, the display panel of the liquid crystal display includes a thin film transistor array substrate on which a thin film transistor array is formed on a glass substrate, a color filter array substrate on which a color filter array is formed on a glass substrate, and the thin film transistor. A liquid crystal layer filled between the array substrate and the color filter array substrate is provided.

The thin film transistor array substrate includes a plurality of gate lines GL extending in a first direction and a plurality of data lines DL extending in a second direction perpendicular to the first direction, and each gate line And one sub-pixel area (Pixel; P) is defined by each data line. One thin film transistor and a pixel electrode are formed in one sub-pixel region P.

The display panel of such a liquid crystal display device generates an electric field in the liquid crystal layer by applying a voltage to the electric field generating electrodes (pixel electrode and common electrode), and adjusts the arrangement state of the liquid crystal molecules of the liquid crystal layer by the electric field to control the incident light. The image is displayed by controlling the polarization.

In addition, among the above display devices, in the display panel of the OLED display device, the plurality of gate lines and the plurality of data lines intersect to define sub-pixels, and each sub-pixel includes an anode and a cathode, and the anode and the cathode. It has an OLED composed of an organic light emitting layer therebetween, and a pixel circuit that independently drives the OLED.

The pixel circuit may be configured in various ways, but includes at least one switching TFT, a capacitor, and a driving TFT.

The at least one switching TFT charges the data voltage to the capacitor in response to the scan pulse. The driving TFT controls the amount of current supplied to the OLED according to the data voltage charged in the capacitor to adjust the amount of light emitted from the OLED.

In addition, the driving circuit for driving the display panel includes a gate driving circuit that sequentially supplies gate pulses (or scan pulses) to the plurality of gate lines of the display panel, and the plurality of data lines of the display panel. And a data driving circuit for supplying a data voltage to the field, a timing controller (T-CON) for supplying image data and various control signals to the gate driving circuit and the data driving circuit.

Such a flat panel display device has advantages of high quality, ultra-thin, light weight, and large area, has space utilization, interior and design advantages, and can have various application fields.

In recent years, a curved display device in which a flat panel display device forms a curved surface is rapidly emerging as a next-generation display device, and the curved display device enables the user to further improve immersion and enhance image quality. It can make the user feel comfortable or have a wider viewing radius than the flat panel display.

On the other hand, in recent years, research on a flat panel/curved variable display device capable of satisfying all of the advantages of a curved display device having an improved immersion and a wide viewing radius along with the advantages of a flat panel display device has been required.

The flexible display device operates in a flat panel mode to improve space utilization, and allows a user to operate in a curved mode to improve immersion or to realize a wider viewing radius. Can.

Recently, a flat panel/curved surface variable display device installs airbags on the left and right sides of the rear surface of a liquid crystal display module, and injects air into the airbag to bend the liquid crystal display module with the expansion force of the airbag to display the curved display device. A method of implementation has been proposed. Also, a method of implementing a curved display device using a motor, a rack, and a pinion has been proposed (see Korean Patent Publication No. 10-2014-0139950).

However, the flat/curved variable display device using an airbag or using a bending actuator in this way has a complicated airbag installation and mechanical bending structure, and thus the installation process is complicated and the unit cost is increased accordingly. In addition, since an airbag and a mechanical device for driving the airbag are required, it is difficult to implement a flat/curved variable display device having a thin structure. In addition, it has been difficult to apply to a small display device.

In addition, recently, a flat panel/curved surface variable display device has been proposed in which a display module is bent using a property between polarities of electromagnets using electromagnet blocks in a display module to implement a curved display device (Korean Patent Publication) See Publication 10-2017-0072989).

However, since the flat panel/curved variable display device using electromagnet blocks is supplied with power not only when changing the shape from the flat mode to the curved mode, but also when maintaining the curved shape, power consumption increases and power is continuously supplied. Due to the heat generated, the display module was damaged.

The present invention is to solve the conventional problems as described above, the object of the present invention is to provide a flat/curved variable display device that can be used by varying the flat mode and curved mode using an electromagnet block and a permanent magnet block. .

The flat/curved variable display device according to the present invention for achieving the above object is arranged alternately on the front and rear surfaces of the display module for displaying an image and the upper and lower bezel regions of the display module. And a plurality of electromagnet blocks and a plurality of permanent magnet blocks for changing to a curved surface mode.

Here, the display module is characterized in that the OLED display module using a flexible substrate or a liquid crystal display module using a flexible substrate.

Each electromagnet block or permanent magnet block disposed in front of the upper bezel area and the lower bezel area of the display module is characterized by having an inclination angle on the side surface.

Each of the electromagnet blocks disposed on the front and rear surfaces of the upper and lower bezel regions is disposed at positions corresponding to each other, and each of the permanent magnet blocks disposed on the front and rear surfaces of the upper and lower bezel regions is disposed at positions corresponding to each other. It is characterized by.

It is characterized in that the current direction applied to each electromagnet block is variable, and thus it is variable in a flat mode or a curved mode.

A plurality of electromagnet blocks disposed in front of the upper bezel region are connected in series to form a first string, and a plurality of electromagnet blocks disposed on the rear surface of the upper bezel region are connected in series to form a second string, and the lower portion is formed. A plurality of electromagnet blocks arranged in front of the bezel region are connected in series to form a third string, and a plurality of electromagnet blocks arranged on the rear surface of the lower bezel region are connected in series to form and drive a fourth string. do.

In addition, the flat/curved variable display device according to the present invention for achieving the above object includes: a display module for displaying an image, and a plurality of alternately arranged in front of the upper bezel region and the lower bezel region of the display module Since the first electromagnet block and a plurality of first permanent magnet blocks and a plurality of second electromagnet blocks in the form of bars alternately arranged on the rear surface of the display module and a plurality of second permanent magnet blocks in the form of bars are further configured, There are other features.

In the flat panel/curved surface flat panel display device according to the present invention having the above characteristics, the following effects are obtained.

First, since the display device is variable in a flat and curved mode using an electromagnet block and a permanent magnet block, it is possible to realize the thinness of the flat/curved variable display device.

Second, after changing the mode, the power supplied to the electromagnet block can be maintained even when the power is turned off, thereby reducing power consumption, as well as suppressing heat generation due to continuous power supply and solving problems caused by heat generation. have.

Third, since the flat/curved variable display device according to the second embodiment of the present invention alternates a plurality of bar-shaped electromagnet blocks and a plurality of permanent magnet blocks on the rear surface of the display module, it occurs on the rear surface of the display module. Since the repulsive force and attraction force become much stronger, the variation of the flat/curved mode is easier.

1 is a front view of a flat panel/curved surface variable display device according to a first embodiment of the present invention
2 is a cross-sectional configuration diagram of a flat mode of a flat panel/curved surface variable display device according to a first embodiment of the present invention
3 is an explanatory diagram of an electromagnet block or a permanent magnet disposed in front of a flat panel/curved surface variable display device according to a first embodiment of the present invention
4 is a cross-sectional configuration diagram of a curved mode of a flat panel/curved surface variable display device according to a first embodiment of the present invention
5 is a rear view of a flat panel/curved surface variable display device according to a second embodiment of the present invention

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. The present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and those skilled in the art to which the present invention pertains. It is provided to fully inform the scope of the invention, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for describing the embodiments of the present invention are exemplary, and the present invention is not limited to the details shown in the drawings. Throughout the specification, the same reference numerals refer to substantially the same components. In addition, in the description of the present invention, when it is determined that detailed descriptions of related known technologies may unnecessarily obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

When "equipped", "included", "have", "consisting of" and the like referred to herein are used, other parts may be added unless'~ only' is used. When a component is expressed in singular, it may be interpreted in plural unless otherwise specified.

In interpreting the components, it is interpreted as including the error range even if there is no explicit description.

In the case of the description of the positional relationship, for example, when the positional relationship between the two components is described as'on the top','on the top','on the bottom','on the side', ' One or more other components may be interposed between those components for which no'direct' or'direct' is used.

The first, second, etc. may be used to classify the components, but the functions or structures of these components are not limited by the ordinal number or the name of the component before the component.

The following embodiments may be partially or totally combined or combined with each other, and technically various interlocking and driving are possible. Each of the embodiments may be implemented independently of each other or may be implemented together in an association relationship.

The flat/curved variable display device according to the present invention will be described in more detail with reference to the accompanying drawings.

1 is a front view of a flat panel/curved surface variable display device according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional configuration diagram of a flat mode of a flat panel/curved surface variable display device according to a first embodiment of the present invention.

The flat panel/curved surface variable display device according to the present invention, as shown in FIGS. 1 and 2, has an electromagnet block on the front and rear surfaces of the upper bezel area 11 and the lower bezel area 12 of the display module 10 ( 20) and the permanent magnet block 30 are alternately arranged.

Here, the display module 10 is preferably an OLED display module using a flexible substrate such as plastic or a liquid crystal display module using a flexible substrate.

And, as shown in Figure 2, the position of the electromagnet block 20 and the permanent magnet block 30 disposed in front of the upper bezel area 11 of the display module 10 and the display module 10 The positions of the electromagnet block 20 and the permanent magnet block 30 disposed on the rear surface of the upper bezel area 11 correspond to each other.

Similarly, the position of the electromagnet block 20 and the permanent magnet block 30 disposed in front of the lower bezel area 12 of the display module 10 and the rear surface of the lower bezel area 12 of the display module 10 The positions of the electromagnet block 20 and the permanent magnet block 30 that are disposed in correspond to each other.

In addition, the position of the electromagnet block 20 and the permanent magnet block 30 disposed in front of the upper bezel area 11 of the display module 10 and the front of the lower bezel area 12 of the display module 10 The positions of the electromagnet block 20 and the permanent magnet block 30 that are disposed in correspond to each other.

And, the position of the electromagnet block 20 and the permanent magnet block 30 disposed on the rear surface of the upper bezel area 11 of the display module 10 and the rear surface of the lower bezel area 12 of the display module 10. The positions of the electromagnet block 20 and the permanent magnet block 30 that are disposed in correspond to each other.

Here, the electromagnet block 20 is a coil wound in one direction on an iron core, and is a general electromagnet whose polarity changes according to a current direction applied to both sides of the coil.

Meanwhile, the electromagnet block 20 and the permanent magnet block 30 disposed in the upper bezel area 11 and the lower bezel area 12 of the front surface of the display module 10 have different lower and upper areas.

3 is an explanatory diagram of an electromagnet block or permanent magnet disposed on the front surface of the flat panel/curved surface variable display device according to the first embodiment of the present invention.

The electromagnet block 20 or the permanent magnet block 3 disposed on the front of the flat/curved variable display device according to the present invention has an arbitrary inclination angle in a trapezoidal shape. This is to allow the gap to occur due to the curvature when the display module 10 is changed to the curved mode.

That is, assuming that the electromagnet block 20 or the permanent magnet block 3 disposed in front of the flat panel/curved surface variable display device has a length of 20 mm and a diameter or height of 10 mm, the display module 10 The length of the lower surface of the side is 20 mm, and the length of the upper surface is 19.8 mm.

In other words, the length of the upper surface is shorter than the length of the lower surface of the electromagnet block 20 or the permanent magnet block 3 disposed on the front surface of the flat panel/curved surface variable display device by about 0.1 mm on both sides.

This is in the form of an electromagnet block 20 or a permanent magnet block 3 disposed in front of the flat panel/curved surface variable display device when the curvature of the display module 10 is calculated to be 1500R.

The length and height of the electromagnet block 20 or the permanent magnet block 3 and the length difference between the lower surface and the upper surface may be variously adjusted according to the curvature when the flat panel/curved surface display device is changed to the curved mode. .

And, the interval between each electromagnet block 20 and each permanent magnet block 3 is made constant. For example, the distance between each electromagnet block 20 and each permanent magnet block 30 is 0.2 mm. Of course, the present invention is not limited thereto, and the electromagnet block 20 and the permanent magnet block 30 may vary in size and magnetic strength.

In the arrangement of the electromagnet block 20 or the permanent magnet block 3, the polarity arrangement of the permanent magnet block 30 is the same. For example, in FIG. 2, the N poles of all the permanent magnet blocks 30 are arranged to face the left direction and the S poles of all the permanent magnets are arranged to the right direction.

The method for changing the mode of the flat panel/curved surface variable display device according to the embodiment of the present invention configured as described above will be described below.

4 is a cross-sectional configuration diagram of a curved mode of a flat panel/curved surface variable display device according to a first embodiment of the present invention.

That is, the case where the display device is discriminated in the curved mode in the state as shown in FIG. 2 is as follows.

First, the current direction applied to each electromagnet block 20 disposed on the rear surface of the upper bezel region 11 and the lower bezel region 12 of the display module 10 is varied, so that each permanent magnet block 30 ), the electromagnet block 20 adjacent to the N pole has the polarity of the N pole, and the electromagnet block 20 adjacent to the S pole of each permanent magnet block 30 has the polarity of the S pole.

In addition, the current direction applied to each electromagnet block 20 disposed in front of the upper bezel region 11 and the lower bezel region 12 of the display module 10 is varied to change the permanent magnet blocks 30. ), the electromagnet block 20 adjacent to the N pole has a polarity of the S pole, and the electromagnet block 20 adjacent to the S pole of each permanent magnet block 30 has a polarity of the N pole.

Accordingly, a repulsive force is generated between each electromagnet block 20 and each permanent magnet block 30 disposed on the rear surface of the upper bezel region 11 and the lower bezel region 12 of the display module 10, and the display module As shown in FIG. 4, an attraction force is generated between each electromagnet block 20 and each permanent magnet block 30 disposed in front of the upper bezel area 11 and the lower bezel area 12 of (10). (10) is transformed into a curved surface.

4, when the display module 10 is deformed into a curved surface, each electromagnet block 20 disposed on the rear surface of the upper bezel region 11 and the lower bezel region 12 of the display module 10 ) And the gap between each permanent magnet block 30 is wider, and each electromagnet block 20 disposed in front of the upper bezel region 11 and the lower bezel region 12 of the display module 10 The gap between the permanent magnet blocks 30 is in close contact.

As described above, when the display module 10 is deformed into a curved surface, when the current supplied to each electromagnet block 20 is cut off, the upper bezel region 11 and the lower bezel region of the display module 10 ( The repulsive force generated between each electromagnet block 20 and each permanent magnet block 30 disposed on the rear surface of 12 is extinguished, but of the upper bezel region 11 and lower bezel region 12 of the display module 10. Each of the electromagnet blocks 20 and the permanent magnet blocks placed on the front maintains attractive force.

That is, since the iron core is present in each electromagnet block 20, a magnetic field is formed between each electromagnet block 20 and each permanent magnet block 30 by the magnetism of each of the permanent magnet blocks 30. When the display module 10 is deformed into a curved surface, each electromagnet block 20 and each permanent magnet block 30 disposed on the rear surface of the upper bezel region 11 and the lower bezel region 12 of the display module 10 The gap between the gaps is wider, and the gap between each electromagnet block 20 and each permanent magnet block 30 disposed in front of the upper bezel region 11 and the lower bezel region 12 of the display module 10. Is in close contact, the magnetic force is weak between each electromagnet block 20 and each permanent magnet block 30 disposed on the rear surface of the upper bezel region 11 and the lower bezel region 12 of the display module 10, Between the electromagnet blocks 20 and the permanent magnet blocks 30 disposed in front of the upper bezel region 11 and the lower bezel region 12 of the display module 10, the magnetic force is strong to maintain attraction.

Accordingly, each electromagnet block 20 and each permanent magnet block disposed in front of the upper bezel area 11 and the lower bezel area 12 of the display module 10 without supplying power to the electromagnet block 20 are provided. The display module 10 may maintain a curved mode state by the attraction force of 30.

In order to change from the curved mode state to the planar mode state as described above, in contrast to the above, current is supplied to each electromagnet block 20.

That is, the current direction applied to each of the electromagnet blocks 20 disposed on the rear surface of the upper bezel region 11 and the lower bezel region 12 of the display module 10 is varied, so that each of the permanent magnet blocks 30 ), the electromagnet block 20 adjacent to the N pole has a polarity of the S pole, and the electromagnet block 20 adjacent to the S pole of each permanent magnet block 30 has a polarity of the N pole.

In addition, the current direction applied to each electromagnet block 20 disposed in front of the upper bezel region 11 and the lower bezel region 12 of the display module 10 is varied to change the permanent magnet blocks 30. ), the electromagnet block 20 adjacent to the N pole has the polarity of the N pole, and the electromagnet block 20 adjacent to the S pole of each permanent magnet block 30 has the polarity of the S pole.

Accordingly, an attraction force is generated between each electromagnet block 20 and each permanent magnet block 30 disposed on the rear surface of the upper bezel region 11 and the lower bezel region 12 of the display module 10, and the display module As shown in FIG. 2, the repulsive force is generated between each electromagnet block 20 and each permanent magnet block 30 disposed in front of the upper bezel region 11 and the lower bezel region 12 of (10). (10) is transformed into a plane.

In the state in which the display module 10 is deformed in a plane as described above, when the current supplied to each electromagnet block 20 is cut off, the upper bezel region 11 and the lower bezel region of the display module 10 ( The attraction generated between each electromagnet block 20 and each permanent magnet block 30 disposed on the rear surface of 12 is also extinguished, and the upper bezel area 11 and the lower bezel area 12 of the display module 10 are removed. Each electromagnet block 20 and each permanent magnet block disposed on the front surface also have hearing loss.

Then, when the display module 10 is deformed in a plane, each electromagnet block 20 and each permanent magnet block disposed on the rear surface of the upper bezel region 11 and the lower bezel region 12 of the display module 10 The interval between 30 is the angle disposed in front of the upper bezel region 11 and the lower bezel region 12 of the display module 10 due to the inclination angles of the electromagnet blocks 20 and the permanent magnet blocks 30. Because it is closer than the gap between the electromagnet block 20 and each permanent magnet block 30. The flat mode is maintained even when the current supplied to each electromagnet block 20 is blocked due to the property that the display module 10 is to maintain the flat mode by maintaining the magnetic force by each permanent magnet block 30. Maintain the state.

As described above, after the display module is changed from a flat mode to a curved mode or after the display module is changed from a curved mode to a flat mode, it is supplied to each electromagnet block 20 until an additional mode change request is made. It maintains the changed mode state even when the current is cut off. Accordingly, power consumption can be reduced, and heat generation due to continuous power supply can be suppressed and problems caused by heat generation can be solved.

The number of electromagnet blocks 20 and permanent magnet blocks 30 described above may vary depending on the size of the display module.

For example, if the 27-inch monitor OLED display module (horizontal length is 596.74mm), 15 electromagnet blocks 20 and 15 permanent magnets in front of the upper bezel area 11 of the display module 10 A block 30 is disposed, 15 electromagnet blocks 20 and 15 permanent magnet blocks 30 are disposed on the rear surface of the upper bezel area 11 of the display module 10, and the display module 10 is disposed. 15 electromagnet blocks 20 and 15 permanent magnet blocks 30 are disposed in front of the lower bezel area 12 of the display, and 15 electromagnet blocks are provided on the rear surface of the lower bezel area 12 of the display module 10. 20 and 15 permanent magnet blocks 30 are arranged.

That is, if 60 electromagnet blocks 20 and 60 permanent magnet blocks 30 are arranged, the display device can be varied in a flat mode and a curved surface mode.

In addition, when arranged as described above, 15 electromagnet blocks 20 arranged in front of the upper bezel area 11 of the display module 10 are connected in series to form a first string, and the display The 15 strings of the electromagnet blocks 20 arranged on the rear surface of the upper bezel area 11 of the module 10 are connected in series to form a second string, and the front of the lower bezel area 12 of the display module 10 is formed. The 15 electromagnet blocks 20 arranged in series to form a third string, and the 15 electromagnet blocks 20 arranged on the rear surface of the lower bezel area 12 of the display module 10 are serially connected to each other. 4 Construct and drive a string.

When driving with four strings in this way, assuming that the minimum level of power that can break the electromagnetic force parallel (experimental example: vertically pulling a 32g ball with 1V and 054A) is used, for each string The power consumption is about 8W (15V*0.54A), and when driving four strings, it is estimated that about 24W of power is consumed. In addition, since power supplied to the electromagnet block 20 is cut off after mode conversion, power consumption is not large.

Meanwhile, in FIGS. 1, 2 and 3, a plurality of front and rear surfaces of the upper bezel area 11 of the display module 10 and a front and rear surfaces of the lower bezel area 12 of the display module 10 are respectively provided. It has been described that the electromagnet block 20 and the plurality of permanent magnet blocks 30 are alternately arranged, but is not limited thereto, and the mode can be changed with a greater force than when changing from the flat mode to the curved mode. .

5 is a rear view of a flat panel/curved surface variable display device according to a second embodiment of the present invention.

As described in the first embodiment of the present invention, the electromagnet block 20 and each permanent magnet block alternately in front of the upper bezel area 11 and the lower bezel area 12 of the display module 10 (30) is placed.

Then, as shown in FIG. 5, a plurality of electromagnet blocks 20 in the form of a bar and a plurality of permanent magnet blocks 30 are alternately arranged on the rear surface of the display module 10.

That is, each electromagnet block 20 and each permanent magnet block 30 are configured in a bar shape so as to extend from the upper bezel region 11 toward the lower bezel region 12, and the bar is provided on the rear surface of the display module 10. The electromagnet block 20 and the permanent magnet block 30 are alternately arranged.

The flat panel/curved surface variable display device according to the second embodiment of the present invention as illustrated in FIG. 5 has much more repulsive force and attractive force generated from the rear surface than the flat panel/curved surface variable display device according to the first embodiment of the present invention. As it is strong, it is easier to change the flat/curved mode.

As described above, since the display device is variable in a planar and curved mode using an electromagnet block and a permanent magnet block, it is possible to realize the thinness of the flat/curved variable display device.

In addition, after the mode is changed, the variable state can be maintained even if the power supplied to the electromagnet block is cut off, thereby reducing power consumption.

In addition, since it is easy to manufacture, it can be applied to various products such as a display device for a TV and a display device for a monitor, thereby providing satisfaction to a user.

Through the above description, those skilled in the art will appreciate that various changes and modifications are possible without departing from the technical idea of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be determined by the scope of the claims.

10: display module 11: upper bezel area
12: lower bezel area 20: electromagnet block
30: permanent magnet block

Claims (10)

A display module displaying an image; And
A flat/curved variable display device comprising a plurality of electromagnet blocks and a plurality of permanent magnet blocks arranged alternately on the front and rear surfaces of the upper and lower bezel regions of the display module. According to claim 1,
The display module is a flat panel / curved variable display device that is an OLED display module using a flexible substrate or a liquid crystal display module using a flexible substrate. According to claim 1,
Each of the electromagnet blocks or permanent magnet blocks disposed in front of the upper bezel area and the lower bezel area of the display module has an inclination angle on the side surface. According to claim 1,
Each electromagnet block disposed on the front and rear surfaces of the upper and lower bezel regions is disposed at positions corresponding to each other, and each permanent magnet block disposed on the front and rear surfaces of the upper and lower bezel regions is disposed at positions corresponding to each other. Flat/curved variable display device. According to claim 1,
A flat panel/curved surface variable display device that changes a current direction applied to each electromagnet block and changes to a flat mode or a curved surface mode. The method of claim 5,
After changing the current direction applied to each electromagnet block, and changing to a flat mode or a curved surface mode, a flat panel/curved variable display device that cuts off power applied to each electromagnet block before requesting to change to the next mode. According to claim 1,
A plurality of electromagnet blocks arranged in front of the upper bezel area are connected in series to form a first string,
A plurality of electromagnet blocks arranged on the rear surface of the upper bezel area are connected in series to form a second string,
A third string is configured by serially connecting a plurality of electromagnet blocks arranged in front of the lower bezel area,
A flat panel/curved surface variable display device configured to drive a fourth string by connecting a plurality of electromagnet blocks arranged on the rear surface of the lower bezel area in series. Display module;
A plurality of first electromagnet blocks and a plurality of first permanent magnet blocks alternately disposed in front of the upper and lower bezel regions of the display module; And
A flat/curved variable display device comprising a plurality of second electromagnet blocks in the form of bars and a plurality of second permanent magnet blocks in the form of bars arranged alternately on the rear surface of the display module. The method of claim 8,
The display module is a flat panel / curved variable display device that is an OLED display module using a flexible substrate or a liquid crystal display module using a flexible substrate. The method of claim 8,
Each of the first electromagnet blocks or the first permanent magnet blocks disposed in front of the upper bezel region and the lower bezel region has an inclined angle on the side surface, and the flat/curved variable display device.

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