Display device

Abstract

To provide a display device with a display panel that can be kept flat or bent with a variable curvature.SOLUTION: A display device according to the present disclosure comprises a display unit with a display panel for displaying images, a curvature changing unit disposed on a rear surface of the display unit and configured to allow curvature of the display unit to be changed, and a vibration unit disposed on the rear surface of the display unit and configured to vibrate the display panel.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present specification relates to a display device, and more particularly to a curved display device. [Background technology]

[0002] As the information society develops, the demands for display devices for displaying images are increasing in various ways. Recently, the display screen of a display device has a flat shape and is enlarged, which causes a problem that the deviation between the viewing distance for the central area of ​​the screen and the viewing distance for the areas on both sides of the screen becomes large.

[0003] In order to improve the viewing distance deviation and maximize the user's immersive viewing experience, a curved display device has been proposed in which a flat display panel is curved at a certain curvature. In conventional curved display devices, the display panel maintains a curved state at a certain curvature, so the curvature of the display panel cannot be changed (or altered) according to the selection (or preference) of the user (or viewer).

[0004] In addition, in conventional curved display devices, sound output from an audio device for outputting sound related to images travels behind or below the display panel, so sound quality is degraded due to interference between sounds reflected from walls and floors, which makes it difficult to transmit sound accurately and can reduce the viewer's sense of immersion.

[0005] Therefore, although a conventional curved display device can maximize a user's sense of viewing immersion through a screen curved with a certain curvature, the user's sense of auditory immersion may be reduced due to the difficulty in transmitting sound accurately. Summary of the Invention [Problem to be solved by the invention]

[0006] The inventors of the present application recognized the problems of conventional curved display devices and conducted multiple experiments on a display device capable of varying (or changing) the curvature of a display panel (or unit) and a display device capable of varying the curvature of the display panel and outputting sound in front of the display panel to maximize the user's (or viewer's) viewing immersion. Through multiple experiments, the inventors invented a display device with a new structure capable of varying the curvature of the display panel and a display device with a new structure capable of maximizing the user's viewing immersion.

[0007] An object of the present invention is to provide a display device in which a display panel can be maintained in a flat shape or the curvature of the display panel can be changed.

[0008] An object of the present invention is to provide a display device capable of maximizing a user's (or viewer's) immersive viewing experience.

[0009] In addition to the technical problems of the present invention mentioned above, other features and advantages of the present invention will be clearly understood by those having ordinary skill in the art to which the present invention pertains from the following description and such techniques and explanations. [Means for solving the problem]

[0010] A display device according to one example of the present specification may include a display unit including a display panel for displaying images, a curvature variable unit arranged on the rear side of the display unit for varying the curvature of the display unit, and a vibration unit arranged on the rear side of the display unit for vibrating the display panel.

[0011] A display device according to an embodiment of the present disclosure includes a display unit including a display panel for displaying an image, and a curvature variable unit disposed on a rear surface of the display unit and capable of varying a curvature of the display unit, the curvature variable unit including a first arc member and a second arc member each having a curved shape and disposed on a first rear region and a second rear region of the display unit parallel to a first direction, a driving unit disposed on a rear intermediate portion of the display unit and configured to simultaneously rotate centers of the first arc member and the second arc member, a guide disposed on the rear surface of the display unit parallel to a second direction intersecting with the first direction and configured to movably support intermediate portions between the center and both ends of the first arc member and the second arc member, and a fixing bracket disposed on a third rear end portion and a fourth rear end portion of the display unit parallel to the second direction intersecting with the first direction, the fixing bracket being capable of transmitting a pressure force applied by a tip of each of the first arc member and the second arc member rotated by driving of the driving unit to each of the third rear end portion and the fourth rear end portion of the display unit. Effect of the Invention

[0012] The display device according to the present specification can maintain the display panel in a flat form or can vary (or change) the curvature of the display panel according to the selection (or preference) of a user (or viewer).

[0013] In addition, the display device according to the present invention can vary the curvature of the display panel and output sound in front of the display panel, thereby maximizing the immersive viewing experience of the user (or viewer).

[0014] In addition to the effects of the present invention mentioned above, other features and advantages of the present invention will be clearly understood by those having ordinary skill in the art to which the present invention pertains from the following description and from such description and explanation. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a front perspective view of a display device according to an example of the present specification. [Diagram 2] FIG. 1 is a plan view showing a display device according to an example of the present specification. [Diagram 3] 1A and 1B are side views showing a planar form and a curved form of a display device according to an example of the present specification. [Figure 4] FIG. 2 is a rear view of a display device according to an example of the present specification. [Diagram 5] FIG. 1 is an exploded perspective view of a display device according to an example of the present specification. [Figure 6] 6 is a diagram showing a variable curvature unit and a vibration unit disposed on the rear surface of the display unit shown in FIG. 5. [Figure 7] 7 is a cross-sectional view taken along line II' shown in FIG. 6. [Figure 8] FIG. 7 is an enlarged view of the “B1” portion shown in FIG. [Figure 9] FIG. 9 is an enlarged view of the “B2” portion shown in FIG. [Figure 10] FIG. 9 is an enlarged view of the “B3” portion shown in FIG. [Figure 11] FIG. 11 is a diagram for explaining the fixed links shown in FIGS. 8 to 10. [Figure 12a] 1 is a cross-sectional view showing a planar form of a display device according to the present specification; [Figure 12b] 1 is a cross-sectional view showing a curvature variable state of a display device according to the present specification; [Figure 13] FIG. 7 is an enlarged view of the “B4” portion shown in FIG. [Figure 14] 13A and 13B are diagrams for explaining a variable curvature unit according to another example of the present specification. [Figure 15] FIG. 15 is an enlarged view of the “B5” portion shown in FIG. [Figure 16] FIG. 16 is an enlarged view of the “B6” portion shown in FIG. [Figure 17] FIG. 15 is an enlarged view of the “B7” portion shown in FIG. [Figure 18a]1 is a cross-sectional view showing a planar form of a display device according to the present specification; [Figure 18b] 1 is a cross-sectional view showing a curvature variable state of a display device according to the present specification; [Figure 19] FIG. 2 is a diagram for explaining a position adjustment unit according to an example of the present specification. [Figure 20] FIG. 13 is a diagram for explaining a curvature variable unit according to yet another example of the present specification. [Figure 21] FIG. 21 is an enlarged view of the “B8” portion shown in FIG. 20. [Figure 22] FIG. 21 is an enlarged view of the “B9” portion shown in FIG. [Figure 23] FIG. 21 is an enlarged view of the “B10” portion shown in FIG. 20. [Figure 24] FIG. 24 is a diagram for explaining the fixed links shown in FIGS. 20, 22, and 23. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The advantages and features of the present specification, and the methods for achieving them, will become clear with reference to the following examples described in detail with the accompanying drawings. However, the present specification is not limited to the embodiments disclosed below, and may be realized in various different forms. The embodiments are provided merely to complete the disclosure of the present specification and to fully inform those skilled in the art of the invention to which the present specification pertains, and the present specification is defined only by the scope of the claims.

[0017] The shapes, sizes, ratios, angles, numbers, etc. shown in the drawings for describing an example of the present specification are merely illustrative, and the present specification is not limited to the matters shown in the drawings. The same reference numerals refer to the same components throughout the specification. In addition, in describing the present specification, if a detailed description of related known technology is determined to unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

[0018] When the terms "comprise", "have", "consist of", etc. are used as mentioned in this specification, other parts can be added unless "only" is used. When an element is expressed in the singular, it includes the plural unless otherwise expressly stated.

[0019] When interpreting elements, they are to be interpreted as including a range of error even if there is no separate explicit description.

[0020] When describing a positional relationship, for example when the positional relationship of two parts is described using "above", "at the top", "below", "beside", etc., one or more other parts may be located between the two parts, unless "immediately" or "directly" is used.

[0021] When describing a temporal relationship, for example when the temporal sequence is described using "after", "following", "next to", "before", etc., it can also include cases where the events are not consecutive, since "immediately" or "directly" are not used.

[0022] Although the terms "first", "second" and the like are used to describe various components, these components are not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, the first component referred to below may be the second component within the technical concept of the present invention.

[0023] The term "at least one" should be understood to include all combinations that can be presented from one or more of the associated items. For example, the meaning of "at least one of the first, second, and third items" may include all combinations of items that can be presented in two or more of the first, second, and third items, not just the first, second, or third items individually.

[0024] The features of each of the examples in this specification may be partially or fully combined or combined with each other, and various technical interlocking and driving mechanisms may be possible, and each example may be implemented independently of each other, or may be implemented together in a related relationship.

[0025] Hereinafter, examples of display devices according to embodiments of the present specification will be described in detail with reference to the accompanying drawings. In assigning reference numerals to components in each drawing, the same components may have the same reference numerals as much as possible even if they are shown in different drawings. In addition, the scales of the components shown in the accompanying drawings may be different from the actual scales for convenience of explanation, and therefore are not limited to the scales shown in the drawings.

[0026] FIG. 1 is a front perspective view showing a display device according to an example of the present specification, FIG. 2 is a plan view showing a display device according to an example of the present specification, and FIG. 3 is a side view showing a planar form and a curved form of a display device according to an example of the present specification.

[0027] Referring to Figures 1 to 3, a display device according to an example of the present specification may include a display unit 100 configured to display an image, and a curvature variable unit that changes the display unit 100 into a flat form (or flat mode) or a curved form (or curved mode) in response to a user's selection (or operation).

[0028] The display unit 100 can be mounted in an upright position on a stand 300 or a wall-mount bracket. For example, the stand 300 or wall-mount bracket can be connected (or coupled) to the rear or curvature-changing unit of the display unit 100. Additionally, the display unit 100 can tilt forward and backward (or forward and backward) or move up and down while mounted on the stand 300 or wall-mount bracket.

[0029] The display unit 100 according to an embodiment can be changed into a flat or curved form by driving the curvature variable unit based on a user's operation on a curvature variable button unit (CVB) disposed on the stand 300. For example, when the display unit 100 is in a flat form having a curvature (R0) of 0 (zero) (or a first curvature), the curvature variable unit can change the display unit 100 into a curved form having a curvature (R1) (or a second curvature) other than 0 (zero) in response to a user's operation on a first button switch (BS1) of the curvature variable button unit (CVB). Here, the curvature variable unit can gradually change the curvature of the display unit 100 depending on the operation time (or pressing duration) of the first button switch (BS1), or can bend (or change) the display unit 100 to a preset curvature (R1) by a single operation (or pressing) of the first button switch (BS1). Conversely, when the display unit 100 is in a curved form having a curvature (R1) other than 0 (zero), the curvature variable unit can change or return the display unit 100 to a flat form having a curvature (R0) of 0 (zero) in response to a user's operation of the second button switch (BS2) of the curvature variable button part (CVB).

[0030] The display unit 100 according to another example can be changed into a flat form or a curved form by driving a curvature changing unit based on a user's operation on a remote controller (RC) supporting a short-range wireless interface. For example, when the display unit 100 is in a flat form having a curvature (R0) of 0 (zero), the curvature changing unit can gradually change the curvature of the display unit 100 according to the operation time (or pressing duration) of a first button (BS1) of the remote controller (RC), or can bend (or change) the display unit 100 to a preset curvature (R1) by a single operation (or single press) of the first button (BS1). Conversely, when the display unit 100 is in a curved form having a curvature (R1) other than 0 (zero), the curvature changing unit can change or return the display unit 100 to a flat form having a curvature (R0) of 0 (zero) in response to a user's operation on a second button (BS2) of the remote controller (RC).

[0031] The display unit 100 of the display device according to an example of the present specification may also function as a diaphragm that displays an image and outputs sound (PVS) to the front (FD) when not displaying an image. Therefore, the display device according to an example of the present specification may further include a vibration unit 500 disposed on the rear surface of the display unit 100.

[0032] The vibration unit 500 can be realized to use the display unit 100 as a diaphragm and output sound (PVS) generated by vibration of the display unit 100 to the front (FD) of the display device. For example, the vibration unit 500 can generate sound (PVS) (or panel vibration sound) by vibrating the display unit 100 (or panel vibration) in response to an audio signal (or voice signal).

[0033] The vibration unit 500 according to an example can be disposed in each of the first vibration area and the second vibration area of ​​the display unit 100. The display unit 100 can realize stereophonic sound by outputting a first sound (or a left sound) and a second sound (or a right sound) generated by the vibration of the first vibration area and the second vibration area by the vibration unit 500 to the forward direction (FD).

[0034] The display device according to an example of the present specification may further include a rear curtain unit 400 implemented on the rear side of the display unit 100 so as to cover the variable curvature unit.

[0035] The rear curtain unit 400 can be deformed to correspond to the change in curvature of the display unit 100 caused by the driving of the curvature variable unit, thereby preventing the mechanism arranged on the rear side of the display unit 100 from being exposed to the outside of the side surface. Such a rear curtain unit 400 will be described later.

[0036] Such a display apparatus according to an example of the present specification may provide a display unit 100 (or display screen) that can be changed (or altered) into a flat form or a curved form according to the selection (or preference) of a user (or viewer), and maximize the viewer's immersive feeling of viewing through the display unit 100 (or display screen) curved in a curved form. In addition, the display apparatus according to an example of the present specification may provide the viewer with accurate and improved sound quality (PVS) without loss or distortion by outputting sound toward the front (FD) of the display unit 100 (viewer's face) by vibration of the display unit 100, thereby providing a display apparatus that can enhance the viewer's auditory immersion. Furthermore, the display device according to one example of the present specification can prevent or minimize the discomfort (or disharmony) caused by the difference in distance between the image and the sound by outputting sound toward the front (FD) of the display unit 100 (the viewer's face) through the vibration of the curved display unit 100 (or display screen), and can provide the viewer with accurate and improved sound quality (PVS) without loss or distortion, thereby maximizing the user's (or viewer's) sense of viewing immersion.

[0037] FIG. 4 is a rear view of a display device according to an example of the present specification, FIG. 5 is an exploded oblique view of a display device according to an example of the present specification, FIG. 6 is a diagram showing a curvature variable unit and a vibration unit arranged on the rear of the display unit shown in FIG. 5, and FIG. 7 is a cross-sectional view of line I-I' shown in FIG. 6.

[0038] 4 to 7, a display device according to an example of the present specification may include a display unit 100, a variable curvature unit 200, and a stand 300.

[0039] The display unit 100 is a screen of a display device and can display an image. For example, the display unit 100 can display an image through a plurality of pixels having self-emitting display elements. Additionally, the display unit 100 can function as a touch sensor that senses a user's touch.

[0040] A display unit 100 according to an example can include a display panel 110 and a back cover 120, as shown in FIG.

[0041] The display panel 110 may include a bendable or curved self-emissive display panel. For example, the display panel 110 may include, but is not limited to, a light-emitting display panel, a micro light-emitting diode display panel, a flexible light-emitting display panel, a flexible micro light-emitting diode display panel, or a quantum dot light-emitting display panel.

[0042] The display panel 110 according to an example may include a pixel array layer disposed on a base substrate, the pixel array layer having a plurality of pixels, and an encapsulation member covering the pixel array layer.

[0043] Each of the plurality of pixels may include a light emitting element layer. The light emitting element layer may be realized as a top light emitting structure (or a front light emitting structure) that emits light to the outside through an encapsulant, or as a bottom light emitting structure (or a back light emitting structure) that emits light to the outside through a base substrate. In this specification, it is assumed that the light emitting element layer is realized as a top light emitting structure.

[0044] The sealing member may have a function of protecting the light emitting element layer from oxygen and / or moisture by covering the pixel array layer. For example, the sealing member of the upper light emitting structure may be transparent, and the sealing member of the lower light emitting structure may be opaque.

[0045] The display panel 110 according to an example may further include a touch sensor layer (or touch electrode layer) for detecting a touch position of a user. When the light emitting element layer has an upper light emitting structure, the touch sensor layer may be disposed on the encapsulating member. When the light emitting element layer has a lower light emitting structure, the touch sensor layer may be disposed on the base substrate.

[0046] The back cover 120 can realize a rear structure of the display unit 100. The back cover 120 can be disposed on the rear surface of the display panel 110 to cover or support the rear surface of the display panel 110.

[0047] According to an example, the back cover 120 may include a metal material or a metal alloy material, for example, the back cover 120 may have any of the following materials, an alloy material thereof, or a joint structure: aluminum, an aluminum alloy, a magnesium alloy, an iron-nickel alloy, and stainless steel, but is not limited thereto.

[0048] The back cover 120 according to an embodiment may be connected (or coupled) to the rear surface of the display panel 110 via a cover connecting member 130 .

[0049] The cover connecting member 130 is interposed between the back cover 120 and the rear surface of the display panel 110, so that an air gap (AG) can be provided between the back cover 120 and the rear surface of the display panel 110.

[0050] The cover connecting member 130 according to an example may be an adhesive resin, a double-sided tape, or a double-sided adhesive foam pad, and may have elasticity for shock absorption.

[0051] According to an example, the cover connecting member 130 may include a magnet, for example, but is not limited to, a rubber magnet.

[0052] The display unit 100 according to an example may further include a middle frame 140 .

[0053] The middle frame 140 may be disposed between an edge portion on the rear side of the display panel 110 and an edge portion on the front side of the back cover 120. The middle frame 140 surrounds both the outer surface (or outer wall) of the display panel 110 and the outer surface (or outer wall) of the back cover 120, thereby protecting the outer surfaces of the display panel 110 and the back cover 120 and improving the outer design of the side of the display device. For example, the middle frame 140 may be expressed as a middle cabinet, a middle cover, or a middle chassis, and is not limited to these terms.

[0054] The middle frame 140 according to an example may include a support portion supporting each end portion of the display panel 110 and the back cover 120, and a side wall portion surrounding each side of the display panel 110 and the back cover 120. For example, the middle frame 140 may have a frame structure having a cross-sectional structure in the shape of a letter "├" or "┤" that forms a single body of the support portion and the side wall portion.

[0055] In one example of the middle frame 140, a first surface of the support can be coupled to a rear edge portion of the display panel 110 via an adhesive member, and a second surface of the support can be coupled to a front edge portion of the back cover 120 via an adhesive member.

[0056] In one example of the middle frame 140, a first surface of the support portion may be spaced apart from a rear edge portion of the display panel 110, and a second surface of the support portion may be coupled to a front edge portion of the back cover 120 via an adhesive member.

[0057] According to an example, the middle frame 140 may be made of a metal material or a plastic material. For example, the middle frame 140 may be made of a metal material in order to improve the side appearance design of the display device and protect the side of the display device, but is not necessarily limited to a metal material.

[0058] 4 to 6, the display unit 100 according to an example may further include at least one rigid member 150.

[0059] The at least one rigid member 150 may be disposed on the rear surface of the display unit 100 parallel to the first direction (X). According to an example, the at least one rigid member 150 may be connected (or coupled) to a rear intermediate region of the display unit 100 parallel to the first direction (X). The at least one rigid member 150 may be realized to have a certain length parallel to the first direction (X) and a certain width parallel to a second direction (Y) intersecting the first direction (X). For example, the at least one rigid member 150 may be made of a metal material, but is not necessarily limited thereto. The at least one rigid member 150 may be fixed to the rear surface of the back cover 120 by a coupling member such as a screw or a bolt, but is not limited thereto, and may be fixed to the rear surface of the back cover 120 by a coupling member such as a double-sided tape.

[0060] The curvature variable unit 200 is disposed on the rear surface of the display unit 100, and is capable of varying the curvature of the display unit 100. For example, the curvature variable unit 200 can be disposed on the rear surface of the back cover 120.

[0061] The curvature variable unit 200 can move (or advance) both sides of the display unit 100 toward the front (FD) of the display device in response to an operation by a user (or viewer), thereby allowing both sides of the display unit 100 to protrude toward the front (FD) of the display device from the center. As a result, the display unit 100 can be changed into a curved shape having a curvature other than 0 (zero) as both sides protrude toward the front (FD) of the display device from the center. For example, the display unit 100 that can be changed into a curved shape can have a curved shape in which the center is concavely curved from both sides when viewed by a viewer positioned in front of the display device. The display unit 100 having such a curved shape can provide a user with an image that has a more three-dimensional effect and a high immersive feeling. For example, the display unit 100 having a curved shape can be realized when a single user, not a plurality of users, watches an image, but is not necessarily limited thereto.

[0062] The curvature variable unit 200 can move (or move backward) both sides of the display unit 100 protruding toward the front (FD) of the display device toward the rear (RD) of the display device in response to a user's operation, thereby returning both sides of the display unit 100 to the same plane as the center part. As a result, the display unit 100 can be changed to a planar shape having a curvature of 0 (zero) as both sides and the center part are positioned on the same plane. Such a planar display unit 100 can be realized when multiple users, not just one user, view images, but is not necessarily limited thereto.

[0063] The curvature varying unit 200 according to one example may include an arc member 210 , a driver 220 , and a guide 230 .

[0064] The arc member 210 may be disposed on the rear surface of the display unit 100. For example, the arc member 210 may be disposed on the rear surface of the back cover 120.

[0065] The arc member 210 according to an embodiment may have a curved shape. For example, the arc member 210 may be expressed as a curvature variation member, a curvature variation rod, a curvature variation bar, or a curvature variation pipe, but is not limited to these terms.

[0066] The arc member 210 can move both sides of the display unit 100 toward the front (FD) or rear (RD) of the display device by rotating as driven by the driver 220. For example, the arc member 210 can rotate up to 90 degrees in a first rotation direction at its position, or rotate up to 90 degrees in a second rotation direction opposite to the first rotation direction as driven by the driver 220. Here, the first rotation direction can be a forward rotation or clockwise rotation, and the second rotation direction can be a reverse rotation or counterclockwise rotation, but is not limited thereto, and can also be vice versa.

[0067] In one example, the arc member 210 can include a first arc member 211 and a second arc member 213 .

[0068] The first arc member 211 may be disposed in a first rear region (RA1) of the display unit 100 parallel to the first direction (X). For example, the first arc member 211 may be disposed in a first rear region (RA1) of the back cover 120. The first rear region (RA1) may be an upper rear region adjacent to a first long side of the rear of the display unit 100 in an upright state or based on the second direction (Y). For example, the first rear region (RA1) of the back cover 120 may be between a rear middle region and the first long side of the display unit 100 parallel to the first direction (X).

[0069] The first arc member 211 may have a curved shape. The first arc member 211 may have a curved shape that is convex toward the center of the rear surface of the display unit 100. The center (or length center) of the first arc member 211 may be adjacent to the center of the rear surface of the display unit 100, and both ends (or both sides) of the first arc member 211 may be adjacent to upper corners of the left and right sides where the first short side and the second short side are connected to the first long side of the display unit 100. For example, one end (or a first end) of the first arc member 211 may be adjacent to an upper corner of the right side of the display unit 100, and the other end (or a second end) of the first arc member 211 may be adjacent to an upper corner of the left side of the display unit 100.

[0070] The second arc member 213 may be disposed in a second rear region (RA2) of the display unit 100 parallel to the first direction (X). The second arc member 213 may be disposed in a second rear region (RA2) of the back cover 120. The second rear region (RA2) may be a lower rear region adjacent to a second long side of the rear of the display unit 100 in an upright state or based on the second direction (Y). The second rear region (RA2) of the back cover 120 may be between the second long side and the rear middle region of the display unit 100.

[0071] The second arc member 213 may have a curved shape. The second arc member 213 may have a curved shape that is convex toward the center of the rear surface of the display unit 100. The center (or the center of the length) of the second arc member 213 may be adjacent to the center of the rear surface of the display unit 100, and both ends (or both sides) of the second arc member 213 may be adjacent to the left and right corners of the lower part where the first short side and the second short side are connected to the second long side of the display unit 100. For example, one end (or a first end) of the second arc member 213 may be adjacent to a corner of the lower right side of the display unit 100, and the other end (or a second end) of the second arc member 213 may be adjacent to a corner of the lower left side of the display unit 100.

[0072] The first arc member 211 and the second arc member 213 may be disposed on the rear surface of the display unit 100 so as to be symmetrical with respect to each other across a rear mid-region or a vertical mid-line (VCL) of the display unit 100. Here, the vertical mid-line (VCL) of the display unit 100 may be located on the center of the short side length (or longitudinal length) of the display unit 100.

[0073] According to an example, each of the first arc member 211 and the second arc member 213 may include a curved shape having a curvature corresponding to the maximum curvature of the display unit 100 to be realized. Each of the first arc member 211 and the second arc member 213 may be an arc rod, an arc bar, or an arc pipe having a circular cross section and a curved shape. For example, each of the first arc member 211 and the second arc member 213 may be made of a metal material, but is not necessarily limited thereto.

[0074] The driver 220 may be disposed in a central area of ​​the rear surface of the display unit 100. The driver 220 may be disposed between the first arc member 211 and the second arc member 213.

[0075] The driver 220 can rotate each of the first arc member 211 and the second arc member 213 simultaneously. The driver 220 can rotate each of the first arc member 211 and the second arc member 213 simultaneously in opposite rotational directions at their positions. For example, the driver 220 can rotate the first arc member 211 at its position in a first rotational direction up to 90 degrees and simultaneously rotate the second arc member 213 at its position in a second rotational direction up to 90 degrees. Conversely, the driver 220 can rotate the first arc member 211 at its position in a second rotational direction up to 90 degrees and simultaneously rotate the second arc member 213 at its position in the first rotational direction up to 90 degrees.

[0076] The drive unit 220 can rotate the first arc member 211 and the second arc member 213 simultaneously at their respective positions through linear motion linked to the rotational motion of the rotary motor.

[0077] The guide 230 may be disposed on the rear surface of the display unit 100 parallel to the second direction (Y) to movably support the first and second intermediate portions of the arc member 210. The guide 230 may be located at the middle (or the middle on the left side) between the center and one end (or the first end) of the first intermediate portion of the arc member 210, and may be located at the middle (or the middle on the right side) between the center and the other end (or the second end) of the second intermediate portion of the arc member 210. Such a guide 230 may prevent the arc member 210, which has a curved shape, from floating when the arc member 210 rotates.

[0078] One side and the other side of the guide 230 may be fixed to the rear surface of the display unit 100. One side and the other side of the guide 230 may be fixed to the rear surface of the back cover 120. A middle portion between one side and the other side of the guide 230 may be spaced apart from the rear surface of the display unit 100. Thus, the arc member 210 may be movably disposed in the space between the rear surface of the display unit 100 and the middle portion of the guide 230, thereby preventing the arc member 210 from floating due to the guide 230 during rotation, and both sides of the display unit 100 may protrude toward the front (FD) of the display device using the guide 230 as a support.

[0079] The guides 230 of one example are arranged in each of the third rear area (RA3) and the fourth rear area (RA4) of the display unit 100, and can movably support each of the first arc member 211 and the second arc member 213.

[0080] In the display unit 100, the third rear area (RA3) may be a right area on the rear surface of the display unit 100 based on a horizontal center line (HCL) of the display unit 100 parallel to the second direction (Y). The fourth rear area (RA4) may be a left area on the rear surface of the display unit 100 based on the horizontal center line (HCL) of the display unit 100. Here, the horizontal center line (HCL) of the display unit 100 may be located at the center of the long side length (or lateral length) of the display unit 100.

[0081] The guide 230 according to one example may include a first guide member 231 and a second guide member 233 .

[0082] The first guide member 231 is disposed in the third rear area (RA3) of the display unit 100, and can movably support the first intermediate portions of the first arc member 211 and the second arc member 213, respectively.

[0083] One side of the first guide member 231 may be fixed to a first rear area (RA1) of the display unit 100, and the other side of the first guide member 231 may be fixed to a second rear area (RA2) of the display unit 100. For example, one side of the first guide member 231 may be fixed to the first rear area (RA1) of the back cover 120 by a fastening member such as a screw or a bolt, and the other side of the first guide member 231 may be fixed to the second rear area (RA2) of the back cover 120 by a fastening member such as a screw or a bolt.

[0084] An intermediate portion between one side and the other side of the first guide member 231 may be disposed on the third rear area (RA3) of the back cover 120 so as to intersect with the first intermediate portions of the first arc member 211 and the second arc member 213. The intermediate portion of the first guide member 231 may be spaced apart from the rear surface of the back cover 120 by a distance greater than the diameter of the arc member 210 depending on the heights of the one side and the other side of the intermediate portion. Thus, the first intermediate portions of the first arc member 211 and the second arc member 213 may be movable into the space between the intermediate portion of the first guide member 231 and the rear surface of the back cover 120.

[0085] The second guide member 233 is disposed in a fourth rear area (RA4) of the display unit 100, and can movably support the second middle portions of the first arc member 211 and the second arc member 213, respectively.

[0086] One side of the second guide member 233 may be fixed to a first rear area (RA1) of the display unit 100, and the other side of the second guide member 233 may be fixed to a second rear area (RA2) of the display unit 100. For example, one side of the second guide member 233 may be fixed to the first rear area (RA1) of the back cover 120 by a fastening member such as a screw or a bolt, and the other side of the second guide member 233 may be fixed to the second rear area (RA2) of the back cover 120 by a fastening member such as a screw or a bolt.

[0087] An intermediate portion between one side and the other side of the second guide member 233 may be disposed on the fourth rear area (RA4) of the back cover 120 so as to intersect with the second intermediate portions of the first arc member 211 and the second arc member 213. The intermediate portion of the second guide member 233 may be spaced apart from the rear surface of the back cover 120 by a distance greater than the diameter of the arc member 210 depending on the height of each of the one side and the other side. Thus, the second intermediate portions of the first arc member 211 and the second arc member 213 may be movable into the space between the intermediate portion of the second guide member 233 and the rear surface of the back cover 120.

[0088] The variable curvature unit 200 according to an example may further include a fixing bracket 240 .

[0089] The fixing bracket 240 is disposed in the third rear area (RA3) and the fourth rear area (RA4) of the display unit 100, and can movably support the leading ends of the first arc member 211 and the second arc member 213. The fixing bracket 240 movably supports the leading ends of the first arc member 211 and the second arc member 213, and can guide the movement of the leading ends of the first arc member 211 and the second arc member 213. For this purpose, the fixing bracket 240 can include a side groove (or a side pocket portion) having a certain depth from the inner surface so that the leading ends of the first arc member 211 and the second arc member 213 can be movably inserted. For example, the fixing bracket 240 can be fixed to be adjacent to each corner portion of the back cover 120 in the third rear area (RA3) and the fourth rear area (RA4) of the display unit 100. When the first arc member 211 and the second arc member 213 rotate, the fixing bracket 240 can transmit the pressure applied by the tips of the first arc member 211 and the second arc member 213 to the third rear end portion and the fourth rear end portion of the display unit 100. In this case, the fixing bracket 240 allows the tips of the first arc member 211 and the second arc member 213 to come into surface contact with the display unit 100, thereby preventing local damage to the display unit 100 due to local point contact between the tips of the first arc member 211 and the second arc member 213 and the display unit 100.

[0090] The fixing bracket 240 according to an example may include first to fourth fixing brackets 241 , 242 , 243 , and 244 .

[0091] The first fixing bracket 241 is disposed in an upper region in the third rear region (RA3) of the display unit 100, and can movably support one end (or a first end) of the first arc member 211. For example, the first fixing bracket 241 can be fixed to the third rear region (RA3) adjacent to the upper right corner portion of the back cover 120.

[0092] The second fixing bracket 242 is disposed in an upper region in the fourth rear region (RA4) of the display unit 100, and can movably support the other end (or the second end) of the first arc member 211. For example, the second fixing bracket 242 can be fixed to the fourth rear region (RA4) adjacent to the upper left corner of the back cover 120.

[0093] The third fixing bracket 243 is disposed in a lower region in the third rear region (RA3) of the display unit 100, and can movably support one end (or a first end) of the second arc member 213. For example, the third fixing bracket 243 is disposed parallel to the first fixing bracket 241, and can be fixed to the third rear region (RA3) adjacent to a lower right corner portion of the back cover 120.

[0094] The fourth fixing bracket 244 is disposed in a lower region in the fourth rear region (RA4) of the display unit 100, and can movably support the other end (or the second end) of the second arc member 213. For example, the fourth fixing bracket 244 is disposed parallel to the second fixing bracket (242), and can be fixed to the fourth rear region (RA4) adjacent to the lower left corner portion of the back cover 120.

[0095] The stand 300 is disposed on the rear surface of the display unit 100 and can support the display unit 100 in an upright state. For example, the stand 300 can be supported by stand support blocks 301, 303 disposed on the variable curvature unit 200.

[0096] The example stand 300 can include a base 310 and a post 330 .

[0097] The base 310 may be realized to have a certain size. The base 310 may include a curvature variable button part (CVB) and a curvature variable control circuit that controls the driver 220 of the curvature variable unit 200 according to a user's operation of the curvature variable button part (CVB).

[0098] The post 330 is disposed perpendicular to the base 310 and can be coupled to stand support blocks 301, 303 disposed on the variable curvature unit 200. This allows the display unit 100 to be supported or attached to the post 330 of the stand 300 in an upright position.

[0099] The display apparatus according to an example of the present specification may further include a speaker unit 350 built into the stand 300. The speaker unit 350 may be built into a post 330 of the stand 300. The speaker unit 350 according to an example may be, but is not necessarily limited to, a woofer speaker.

[0100] The display device according to an example of the present disclosure may further include a rear curtain unit 400 .

[0101] 3 to 5, the rear curtain unit 400 can be realized on the rear of the display unit 100 so as to cover the curvature variable unit 200. The rear curtain unit 400 can realize the rear structure of the display device. The rear curtain unit 400 can be deformed to correspond to the change in curvature of the display unit 100 caused by driving the curvature variable unit 200.

[0102] The rear curtain unit 400 according to one example can include a curtain edge frame 410 , a curtain rear frame 430 , and a number of curtain members 450 .

[0103] The curtain edge frame 410 may be connected to a rear edge portion of the display unit 100 and may include a first opening. For example, the curtain edge frame 410 may be realized in the form of a picture frame having a first opening overlapping with the rear surface of the display unit 100 except for the rear edge portion of the display unit 100. The curtain edge frame 410 may be fixed to the rear edge portion of the back cover 120 by a fastening member such as a screw or a bolt.

[0104] The curtain back frame 430 may be coupled to the curtain edge frame 410 and may include a second opening overlapping the first opening. For example, the curtain back frame 430 may be realized in the form of a picture frame having a second opening overlapping the first opening of the curtain edge frame 410. The curtain back frame 430 may be fixed to the curtain edge frame 410 by a coupling member such as a screw or a bolt.

[0105] The curtain members 450 may be fixed to the curtain back frame 430 so as to be parallel to the second direction (Y) and spaced apart from each other along the first direction (X). The curtain members 450 may be arranged in the second opening of the curtain back frame 430 so as to be parallel to the second direction (Y) and spaced apart from each other along the first direction (X). For example, each of the curtain members 450 may be arranged in the second opening of the curtain back frame 430 so as to have a certain tension and may be tilted at a certain angle to correspond to the variable curvature of the display unit 100. Each of the curtain members 450 according to an example may include a fiber material or a fabric material that is deformable to correspond to the variable curvature of the display unit 100.

[0106] The rear curtain unit 400 according to an example may further include a stand connection hole 470. The stand connection hole 470 may be realized by removing the middle part of the plurality of curtain members 450, so that the middle part of the rear of the display unit 100 may be exposed to the rear (RD) of the display device.

[0107] The display device according to an example of the present specification may further include a vibration unit 500.

[0108] 4 to 7, the vibration unit 500 is disposed on the rear surface of the display unit 100, and can be realized to vibrate the display panel 110 so that sound is output by the vibration of the display panel 110. For example, the vibration unit 500 can realize stereo sound by vibrating the first vibration area (or the third rear area (RA3)) and the second vibration area (or the fourth rear area (RA4)) of the display unit 100, respectively, and outputting the first sound (or the left sound) and the second sound (or the right sound) generated in the first vibration area and the second vibration area of ​​the display unit 100, respectively, to the front (FD) of the display unit 100.

[0109] The vibration unit 500 may be supported by the back cover 120 of the display unit 100 and may penetrate the back cover 120 to be connected to the rear surface of the display panel 110. To this end, the back cover 120 may include a through hole 121 into which the vibration unit 500 can be inserted.

[0110] The vibrating unit 500 according to one example can include first and second vibrating units 510, 530.

[0111] The first vibrating unit 510 may vibrate a first vibrating area (RA3) of the display unit 100 to output a first sound (or a left sound) generated in the first vibrating area of ​​the display unit 100 to the front (FD) of the display unit 100. For example, the first vibrating unit 510 may be supported by the back cover 120 and connected to the rear surface of the display panel 110 through a through hole 121 disposed in the back cover 120.

[0112] The second vibrating unit 530 may vibrate the second vibrating area (RA4) of the display unit 100 to output a second sound (or a right sound) generated in the second vibrating area of ​​the display unit 100 to the front (FD) of the display unit 100. For example, the second vibrating unit 530 may be supported by the back cover 120 and connected to the rear surface of the display panel 110 by passing through a through hole 121 disposed in the back cover 120.

[0113] According to an example, each of the first vibrating unit 510 and the second vibrating unit 530 may include a first and a second sound generating unit 511 , 513 arranged parallel to each other on the display unit 100 .

[0114] The first and second sound generating units 511, 513 are supported on the back cover 120 of the display unit 100 so as to be parallel to each other, and can be connected to the rear surface of the display panel 110 by passing through the first and second through holes 121a, 121b, respectively, of the through hole 121 arranged on the back cover 120.

[0115] The first sound generating unit 511 of the first vibration unit 510 can pass through a first through hole 121a arranged in the back cover 120 overlapping with the first vibration area (RA3) of the display unit 100, connect to the first vibration area (RA3) of the display panel 110, and be coupled to the rear surface of the back cover 120 around the first through hole 121a.

[0116] The second sound generating unit 513 of the first vibration unit 510 can be connected to the first vibration area (RA3) of the display panel 110 by passing through a second through hole 121b arranged in the back cover 120 overlapping with the first vibration area (RA3) of the display unit 100, and can be coupled to the rear surface of the back cover 120 around the second through hole 121b.

[0117] The first sound generating unit 511 of the second vibration unit 530 can pass through a first through hole 121a arranged in the back cover 120 overlapping with the second vibration area (RA4) of the display unit 100, connect to the second vibration area (RA4) of the display panel 110, and be attached to the rear surface of the back cover 120 around the first through hole 121a.

[0118] The second sound generating unit 513 of the second vibration unit 530 can pass through a second through hole 121b arranged in the back cover 120 overlapping with the second vibration area (RA4) of the display unit 100, connect to the second vibration area (RA4) of the display panel 110, and be coupled to the rear surface of the back cover 120 around the second through hole 121b.

[0119] According to an example, each of the first and second sound generating units 511 , 513 of the first vibrating unit 510 and the second vibrating unit 530 may include a base frame 501 , a magnet 502 , a bobbin 503 , a coil 504 , a center pole 505 , and a damper 506 .

[0120] The base frame 501 may be expressed as a fixed part that is fixed to the back cover 120. The magnet 502, the bobbin 503, the coil 504, the center pole 505, and the damper 506 may be expressed as a vibration part for vibrating the display panel 110, but is not necessarily limited thereto.

[0121] The base frame 501 according to an example can include a frame body 501a, an upper plate 501b, and a protruding bracket 501c.

[0122] The frame body 501a may be fixed to the back cover 120. The frame body 501a may serve as a lower plate that supports the magnet 502.

[0123] The upper plate 501b may be disposed at a front end portion of the frame body 501a so as to have a cylindrical shape having a hollow portion. The frame body 501a and the upper plate 501b may be formed into one body having a "U" shape. For example, the frame body 501a and the upper plate 501b are not limited to the term and may be expressed by other terms such as a yoke.

[0124] The protruding bracket 501c may protrude from a side surface of the upper plate 501b. The protruding bracket 501c may be fixed to the rear surface of the back cover 120 by a fastening member 515, so that the base frame 501 may be fixed to the back cover 120.

[0125] The fastening member 515 may be a screw or a bolt that passes through the protruding bracket 501c and is fastened to the rear surface of the back cover 120. In this case, a buffer member 600 may be interposed between the rear surface of the back cover 120 and the protruding bracket 501c.

[0126] When the curvature of the display panel 110 is changed, the buffer member 600 tilts the base frame 501 according to the curvature of the display panel 110, thereby maintaining a contact state between the first and second sound generating units 511 and 513 and the display panel 110. For example, the buffer member 600 may be an elastic spring or an elastic pad, but is not necessarily limited thereto.

[0127] The magnet 502, the bobbin 503 and the coil 504 are arranged on the base frame 501, and can be expressed as a magnetic circuit unit or a magnetic vibration unit that vibrates the display panel 110.

[0128] The magnetic circuit unit according to an example may have an external magnetic type or dynamic type structure including a magnet 502 arranged outside the coil 504, or an internal magnetic type or micro type structure including a magnet 502 arranged inside the coil 504. The first and second sound generating units 511, 513 including a magnetic circuit unit having an internal magnetic type structure have the advantage of having small leakage magnetic flux and a small overall size. The first and second sound generating units 511, 513 based on this specification may have an external magnetic type or internal magnetic type structure, and the following description will be given assuming that they have an internal magnetic type structure.

[0129] The magnet 502 may be disposed in a groove in the base frame 501. The magnet 502 may be a permanent magnet having a cylindrical shape that can be inserted into a bobbin 503.

[0130] The bobbin 503 is disposed on the base frame 501 so as to surround the magnet 502, and may be coupled to the rear surface of the display panel 110. The bobbin 503 may have a circular or elliptical shape, but is not limited thereto. The oval shape may include, but is not limited to, an elliptical shape, a rectangular shape with rounded corners, or a non-circular curved shape having a width different from its height. For example, the elliptical bobbin 503 may have a ratio of the major diameter to the minor diameter of 1.3:1 to 2:1. The elliptical bobbin 503 may improve the acoustics of the high frequency range more than the circular shape, and may have excellent heat dissipation characteristics since less heat may be generated due to vibration.

[0131] The coil 504 is wound around the outer periphery of the bobbin 503, and is supplied with a current (or voice current) of a driving signal from the outside. The coil 504 can rise and fall together with the bobbin 503. The coil 504 can be expressed as a voice coil, but is not limited to this term. When a current is applied to the coil 504, the entire bobbin 503 moves up and down according to Fleming's left-hand rule based on the applied magnetic field formed around the coil 504 and the external magnetic field formed around the magnet 502, and sound (or panel vibration sound) is generated by the vibration of the display panel 110 due to the up and down movement (or vibration) of the bobbin 503, and such sound can be output toward the front (FD) of the display unit 100.

[0132] The center pole 505 can be disposed on the magnet 502 to guide the vibration of the bobbin 503. For example, the center pole 505 can be surrounded by the bobbin 503 by being inserted or housed in a hollow portion of the bobbin 503. For example, the center pole 505 can be expressed as a lift guide or pole pieces, but is not limited thereto.

[0133] The damper 506 may be disposed between the base frame 501 and the bobbin 503. According to an example, the damper 506 may be disposed between a protruding frame protruding from the frame body 501a of the base frame 501 to surround the upper plate 501b and the upper outer circumferential surface of the bobbin 503. The damper 506 may have a bellows structure between one end and the other end, and may contract and relax due to the vibration of the bobbin 503. The damper 506 may limit the vibration distance (or vertical movement distance) of the bobbin 503 through a restoring force. For example, when the bobbin 503 vibrates above a certain distance or below a certain distance, the damper 506 may return to its original position due to the restoring force of the damper 506. For example, the damper 506 may be expressed by other terms such as a spider, a suspension, or an edge, but is not limited thereto.

[0134] According to an example, each of the first and second sound generating units 511 and 513 may further include a bobbin protection member 507 disposed on the upper part of the bobbin 503. For example, the bobbin protection member 507 may be expressed as a bobbin ring or a bobbin cap, but is not limited thereto.

[0135] The bobbin protection member 507 is disposed on the front surface (or tip portion) of the bobbin 503 and transmits the elevation (or vibration) of the bobbin 503 to the rear surface of the display panel 110. The bobbin protection member 507 according to an example may have a ring shape disposed on the front surface of the bobbin 503, a disk shape covering the entire front surface of the bobbin 503, or a cap shape enveloping the front surface and the upper outer surface of the bobbin 503, but is not limited to a particular shape.

[0136] The bobbin protection member 507 may be disposed (or coupled) to the rear surface of the display panel 110 via a first adhesive member. The first adhesive member may be interposed between the rear surface of the display panel 110 and the bobbin protection member 507. The first adhesive member according to an example may include, but is not limited to, an adhesive or a double-sided tape.

[0137] The bobbin protection member 507 according to an example may be configured in the form of an injection molded product or a metal molded product. For example, the bobbin protection member 507 may be configured of a fiber reinforced material, a composite resin containing a fiber reinforced material, or a metal. In this case, the bobbin protection member 507 may also have a heat dissipation function for dissipating heat generated when the first and second sound generating units 511 and 513 are driven.

[0138] FIG. 8 is an enlarged view of the "B1" portion shown in FIG. 6, FIG. 9 is an enlarged view of the "B2" portion shown in FIG. 8, and FIG. 10 is an enlarged view of the "B3" portion shown in FIG. 8, which are diagrams for explaining the driving part of the curvature variable unit.

[0139] 8 to 10, a driving section 220 of a curvature varying unit 200 according to an example of the present disclosure may include a support plate 221, a holder 222, a fixed link 223, at least one rotation motor 224, and a gear assembly 225.

[0140] The support plate 221 may be disposed so as to overlap with the center of the rear surface of the display unit 100. For example, the support plate 221 may be realized to have a certain width parallel to the first direction (X) and a certain length parallel to the second direction (Y), and may be disposed (or coupled) on the rear surface of the back cover 120 so as to overlap with the center (or center of length) of each of the first arc member 211 and the second arc member 213. Such a support plate 221 may support the holder 222, at least one rotation motor 224, and each of the gear assembly 225.

[0141] The support plate 221 may include stand support blocks 301, 303 that couple to the stand 300. For example, each of the stand support blocks 301, 303 may be coupled to an upper side and a lower side of the support plate 221, respectively.

[0142] The holder 222 is coupled to the support plate 221 and can rotatably support the central portion of the arc member 210. Thus, the central portion of the arc member 210 can be rotatably disposed between the support plate 221 and the holder 222. Additionally, the driving unit 220 according to an example can further include a bearing interposed between the central portion of the arc member 210 and the holder 222.

[0143] In one example, the holder 222 may include a first holder 222a coupled to the support plate 221 and rotatably supporting a central portion of the first arc member 211, and a second holder 222b coupled to the support plate 221 and rotatably supporting a central portion of the second arc member 213.

[0144] According to an example, both ends of each of the first holder 222a and the second holder 222b may be coupled to the support plate 221 by coupling members such as screws or bolts.

[0145] In one example, the driving unit 220 may further include a first bearing interposed between the center of the first arc member 211 and the first holder 222a, and a second bearing interposed between the center of the second arc member 213 and the second holder 222b.

[0146] The fixed link 223 may be fixed to the center of the arc member 210. For example, the fixed link 223 may be fixed to the center of the arc member 210 by a fixing member (FM), such as a screw or a bolt.

[0147] The fixed link 223 according to one example may include a first fixed link (FL1) fixed to the center of the first arc member 211 and a second fixed link (FL2) fixed to the center of the second arc member 213.

[0148] Each of the first fixed link (FL1) and the second fixed link (FL2) may include a pair of link fixing parts (LFP) that protrude parallel to each other across the holders 222a and 222b. The pair of link fixing parts (LFP) may be fixed to the center of the corresponding arc members 211 and 213 by the fixing member (FM).

[0149] The first fixed link (FL1) may be disposed on an inner surface of the first arc member 211 facing the rear middle region of the display unit 100, and may be disposed inclined at a certain angle (θ) in the second direction (Y), as shown in FIG. 11. The first fixed link (FL1) may be inclined at a certain angle (θ) from the rear surface of the display unit 100. For example, the first fixed link (FL1) may be inclined 45 degrees clockwise from a vertical line extending from the central axis of the first arc member 211 in the thickness direction (Z) of the display unit 100. In this case, the angle between the extension line connecting the central axis of the first fixed link (FL1) and the central axis of the first arc member 211 and the rear surface of the display unit 100 may be 45 degrees.

[0150] The second fixed link (FL2) may be disposed on an inner surface of the second arc member 213 facing the rear middle region of the display unit 100, and may be disposed inclined at a certain angle (θ) with respect to the second direction (Y), as shown in FIG. 11. The second fixed link (FL2) may be inclined at a certain angle (θ) from the rear surface of the display unit 100. For example, the second fixed link (FL2) may be inclined 45 degrees counterclockwise from a vertical line extended from the central axis of the second arc member 213 in the thickness direction (Z) of the display unit 100. In this case, the angle between the extension line connecting the central axis of the second fixed link (FL2) and the central axis of the second arc member 213 and the rear surface of the display unit 100 may be 45 degrees.

[0151] 8, at least one rotation motor 224 may be disposed in a rear central region of the display unit 100 and supported by a support plate 221. The at least one rotation motor 224 may provide a rotational force to a gear assembly 225 in response to a user's operation for varying the curvature of the display unit 100.

[0152] The driving unit 220 according to this example may include first and second rotary motors 224a, 224b (or a pair of rotary motors) in order to maintain balance, reduce noise, and ensure a driving force (or rotational force) margin.

[0153] The first and second rotation motors 224a, 224b may be positioned alongside one another with a gear assembly 225 therebetween. The drive shaft (or rotation shaft) of the first rotation motor 24a may be positioned adjacent to the first arc member 211, and the drive shaft (or rotation shaft) of the second rotation motor 224b may be positioned adjacent to the second arc member 213. In this case, the first and second rotation motors 224a, 224b may rotate in the same direction as one another.

[0154] 8 to 11, the gear assembly 225 may be disposed on the support plate 221 and connected to the rotary motor 224. The gear assembly 225 may rotate the fixed link 223 in conjunction with the rotary motion of the rotary motor 224, and may rotate the arc member 210 at its position through the rotation of the fixed link 223. For example, the gear assembly 225 may rotate the first fixed link (FL1) and the second fixed link (FL2) of the fixed link 223 in opposite directions in conjunction with the rotary motion of the rotary motor 224, thereby simultaneously rotating the first arc member 211 and the second arc member 213 at their positions. The gear assembly 225 may be expressed as a gear assembly or a reduction gear unit, but is not necessarily limited thereto.

[0155] The gear assembly 225 according to one example can include a first rack gear (RG1), a second rack gear (RG2), a pinion gear (PG), and a rotation transmission part (RTP).

[0156] The first rack gear (RG1) is rotatably connected to the first fixed link (FL1) and can rotate the first fixed link (FL1) up to 90 degrees in the first rotational direction or up to 90 degrees in the second rotational direction via linear motion along the second direction (Y).

[0157] One end of the first rack gear (RG1) can be rotatably connected to the first fixed link (FL1) via the first hinge pin (HP1). The first fixed link (FL1) can be rotatably connected to one end of the first rack gear (RG1) via the first hinge pin (HP1). As a result, the first fixed link (FL1) can rotate by the linear motion of the first rack gear (RG1), thereby rotating the first arc member 211. Here, the first rack gear (RG1) can move along the thickness direction (Z) of the display unit 100 according to the rotation trajectory (RT) of the first fixed link (FL1). For example, the first rack gear (RG1) can move up (Z+) or down (Z-) along the thickness direction (Z) of the display unit 100 by a distance (Lt) corresponding to the rotation trajectory (RT) of the first fixed link (FL1) while moving linearly along the second direction (Y).

[0158] The second rack gear (RG2) is rotatably connected to the second fixed link (FL2) and can rotate the second fixed link (FL2) up to 90 degrees in the first rotational direction or up to 90 degrees in the second rotational direction via linear motion along the second direction (Y).

[0159] One end of the second rack gear (RG2) can be rotatably connected to the second fixed link (FL2) via the second hinge pin (HP2). The second fixed link (FL2) can be rotatably connected to one end of the second rack gear (RG2) via the second hinge pin (HP2). As a result, the second fixed link (FL2) can rotate the second arc member 213 by rotating due to the linear motion of the second rack gear (RG2). Here, the second rack gear (RG2) can move along the thickness direction (Z) of the display unit 100 according to the rotation trajectory (RT) of the second fixed link (FL2). For example, the second rack gear (RG2) can move up (Z+) or down (Z-) along the thickness direction (Z) of the display unit 100 by a distance (Lt) corresponding to the rotation trajectory (RT) of the second fixed link (FL2) while moving linearly along the second direction (Y).

[0160] The pinion gear (PG) can be connected (or meshed) between the first rack gear (RG1) and the second rack gear (RG2). The pinion gear (PG) can linearly move the first rack gear (RG1) and the second rack gear (RG2) in opposite directions to each other by rotating. For example, the pinion gear (PG) can rotate in a first rotation direction to linearly move the first rack gear (RG1) in a first linear direction (Y+) parallel to the second direction (Y) and linearly move the second rack gear (RG2) in a second linear direction (Y-) opposite to the first linear direction (Y+). Conversely, the pinion gear (PG) can rotate in a second rotation direction opposite to the first rotation direction to linearly move the first rack gear (RG1) in the second linear direction (Y-) and linearly move the second rack gear (RG2) in the first linear direction (Y+).

[0161] The pinion gear (PG) according to an example can be realized so that the rack gears (RG1, RG2) can rise (Z+) or fall (Z-) according to the rotation trajectory (RT) of the fixed links (FL1, FL2) that rotate according to the linear motion of the rack gears (RG1, RG2). For example, the gear height (or this height) of the pinion gear (PG) can be realized to exceed the maximum rise height (or distance) of the rack gears (RG1, RG2) according to the rotation trajectory (RT) of the fixed links (FL1, FL2).

[0162] The pinion gear (PG) according to an example may include a dual gear structure including a first rotating gear (RGa) having a first size and a second rotating gear (RGb) having a second size larger than the first size. For example, the first rack gear (RG1) and the second rack gear (RG2) may be disposed on the second rotating gear (RGb). The first rotating gear (RGa) may be coupled (or meshed) between the first rack gear (RG1) and the second rack gear (RG2). And, the gear height (or this height) of the first rotating gear (RGa) may be realized to exceed the maximum lift height (or distance) of the rack gears (RG1, RG2) according to the rotation trajectory (RT) of the fixed link (FL1, FL2).

[0163] The rotation transmission unit (RTP) can transmit the rotational motion of the rotation motor 224 to the pinion gear (PG). The rotation transmission unit (RTP) can rotate the pinion gear (PG) by reducing the rotation speed of the rotation motor 224. For example, the rotation transmission unit (RTP) can rotate the pinion gear (PG) in the first rotation direction by transmitting the rotation of the first rotation motor 224a in the first rotation direction to the pinion gear (PG). Conversely, the rotation transmission unit (RTP) can rotate the pinion gear (PG) in the second rotation direction by transmitting the rotation of the first rotation motor 224a in the second rotation direction to the pinion gear (PG).

[0164] The rotation transmission part (RTP) according to one example may include a first worm 225a, a first worm gear (WG1), and first and second spur gears (SG1, SG2).

[0165] The first worm 225a may be coupled to a drive shaft of the first rotation motor 224a. The first worm 225a may rotate in a first rotation direction by the rotation of the first rotation motor 224a in a first rotation direction, or may rotate in a second rotation direction by the rotation of the first rotation motor 224a in a second rotation direction.

[0166] The first worm gear (WG1) is connected (or meshed) with the first worm 225a and can rotate by the rotational motion of the first worm 225a. For example, the first worm gear (WG1) can rotate only one gear when the first worm 225a rotates once. The rotation axis direction of the first worm gear (WG1) can be perpendicular to the rotation axis direction of the first worm 225a. For example, the rotation axis direction of the first worm 225a can be parallel to the second direction (Y), and the rotation axis direction of the first worm gear (WG1) can be parallel to the thickness direction (Z) of the back cover 120.

[0167] The first worm gear (WG1) according to an example may include a dual gear structure including a lower worm gear having a first size and an upper worm gear having a second size smaller than the first size. For example, in the first worm gear (WG1) having the dual gear structure, the lower worm gear may be coupled (or meshed) with the first worm 225a, and the upper worm gear may be coupled (or meshed) with the first spur gear (SG1).

[0168] The first spur gear (SG1) can be connected (or meshed) with the first worm gear (WG1) and rotate in a direction opposite to the direction of rotation of the first worm gear (WG1). For example, the first spur gear (SG1) can be connected (or meshed) between the upper worm gear of the first worm gear (WG1) and the second spur gear (SG2).

[0169] The second spur gear (SG2) can be connected (or meshed) with the first spur gear (SG1) and connected (or meshed) with the pinion gear (PG). The second spur gear (SG2) rotates in a direction opposite to the direction of rotation of the first spur gear (SG1), thereby causing the pinion gear (PG) to rotate.

[0170] The second spur gear (SG2) according to an example may include a dual gear structure including a lower spur gear having a first size and an upper spur gear having a second size larger than the first size. For example, in the second spur gear (SG2) having the dual gear structure, the lower spur gear may be coupled (or meshed) with the second rotating gear (RGb) of the pinion gear (PG), and the upper spur gear may be coupled (or meshed) with the first spur gear (SG1).

[0171] The rotation transmission unit (RTP) can rotate the pinion gear (PG) in the first rotation direction by transmitting the rotation of the second rotation motor 224b in the first rotation direction to the pinion gear (PG). Conversely, the rotation transmission unit (RTP) can rotate the pinion gear (PG) in the second rotation direction by transmitting the rotation of the second rotation motor 224b in the second rotation direction to the pinion gear (PG). For this reason, the rotation transmission unit (RTP) according to an example may further include a second worm 225b, a second worm gear (WG2), and third and fourth spur gears (SG3, SG4).

[0172] The second worm 225b may be coupled to a drive shaft of the second rotation motor 224b. The second worm 225b may rotate in a first rotation direction by the rotation of the second rotation motor 224b in a first rotation direction, or may rotate in a second rotation direction by the rotation of the second rotation motor 224b in a second rotation direction.

[0173] The second worm gear (WG2) is connected (or meshed) with the second worm 225b and can rotate by the rotational motion of the second worm 225b. For example, the second worm gear (WG2) can rotate one gear when the second worm 225b rotates once. The rotation axis direction of the second worm gear (WG2) can be perpendicular to the rotation axis direction of the second worm 225b. For example, the rotation axis direction of the second worm 225b can be parallel to the second direction (Y), and the rotation axis direction of the second worm gear (WG2) can be parallel to the thickness direction (Z) of the back cover 120.

[0174] The second worm gear (WG2) according to an example may include a dual gear structure including a lower worm gear having a first size and an upper worm gear having a second size smaller than the first size. For example, in the second worm gear (WG2) having the dual gear structure, the lower worm gear may be coupled (or meshed) with the second worm 225b, and the upper worm gear may be coupled (or meshed) with the third spur gear (SG3).

[0175] The third spur gear (SG3) can be connected (or meshed) with the second worm gear (WG2) to rotate in a direction opposite to the direction of rotation of the second worm gear (WG2). For example, the third spur gear (SG3) can be connected (or meshed) between the upper worm gear of the second worm gear (WG2) and the fourth spur gear (SG4).

[0176] The fourth spur gear (SG4) can be connected (or meshed) with the third spur gear (SG3) and connected (or meshed) with the pinion gear (PG). The fourth spur gear (SG4) rotates in a direction opposite to the direction of rotation of the third spur gear (SG3), thereby causing the pinion gear (PG) to rotate.

[0177] The fourth spur gear (SG4) according to an example may include a dual gear structure including a lower spur gear having a first size and an upper spur gear having a second size larger than the first size. For example, in the fourth spur gear (SG4) having the dual gear structure, the lower spur gear may be coupled (or meshed) with the second rotating gear (RGb) of the pinion gear (PG), and the upper spur gear may be coupled (or meshed) with the third spur gear (SG3).

[0178] The driving section 220 of the curvature varying unit 200 according to an example of the present specification may further include a guide rail 226.

[0179] The guide rail 226 is disposed between the support plate 221 and the rack gears (RG1, RG2) and is capable of guiding the linear motion of the rack gears (RG1, RG2).

[0180] In one example, the guide rail 226 may include a first guide rail 266a arranged between the support plate 221 and a first rack gear (RG1), and a second guide rail 226b arranged between the support plate 221 and a second rack gear (RG2).

[0181] The first guide rail 266a may be disposed on the support plate 221 so as to have a guide groove. In this case, the first rack gear (RG1) may include a slide protrusion inserted so as to be slidable into the guide groove of the first guide rail 266a. This allows the first rack gear (RG1) to move linearly on the first guide rail 266a by the rotation of the pinion gear (PG).

[0182] The second guide rail 226b may be disposed on the support plate 221 so as to have a guide groove. In this case, the second rack gear (RG2) may include a slide protrusion inserted so as to be slidable into the guide groove of the second guide rail 226b. This allows the second rack gear (RG2) to move linearly on the second guide rail 226b by the rotation of the pinion gear (PG).

[0183] The driving unit 220 of the curvature varying unit 200 according to an example of the present specification may further include a limit switch unit 227.

[0184] The limit switch unit 227 is disposed on the support plate 221 adjacent to the rack gears (RG1, RG2) and can limit the maximum distance of linear motion of the rack gears (RG1, RG2). For example, the limit switch unit 227 can be realized to limit the maximum distance of linear motion of the rack gears (RG1, RG2) by physical contact with the rack gears (RG1, RG2).

[0185] According to one example, the limit switch portion 227 can include a first limit switch portion 227a and a second limit switch portion 227b.

[0186] The first limit switch portion 227a can limit the maximum linear motion distance of the first rack gear (RG1) along the first linear direction (Y+). The first limit switch portion 227a can limit the maximum rotation angle of the arc member 210 or the maximum curvature of the display unit 100.

[0187] The first limit switch unit 227a according to an example may include a first limit switch (LS1) disposed on the support plate 221 adjacent to the first arc member 211, and a first stopper (SP1) protruding from an outer surface of the first rack gear (RG1). The first limit switch (LS1) may generate a first limit signal and provide it to the curvature variable control circuit when the first limit switch (LS1) physically contacts the first stopper (SP1) disposed on the first rack gear (RG1) that moves linearly along the first linear direction (Y+). The curvature variable control circuit may stop the rotation of the rotation motor 224 in response to the first limit signal provided from the first limit switch (LS1).

[0188] The second limit switch portion 227b can limit the maximum linear motion distance of the second rack gear (RG2) along the second linear direction (Y-).

[0189] The second limit switch unit 227b according to an example may include a second limit switch (LS2) disposed on the support plate 221 adjacent to the pinion gear (PG) and a second stopper (SP2) protruding from an outer surface of the second rack gear (RG2). When the second limit switch (LS2) physically contacts the second stopper (SP2) disposed on the second rack gear (RG2) that moves linearly along the first linear direction (Y+), the second limit switch (LS2) may generate a second limit signal and provide it to the curvature variable control circuit. The curvature variable control circuit may stop the rotation of the rotation motor 224 in response to the second limit signal provided from the second limit switch (LS2).

[0190] FIG. 12a is a cross-sectional view showing a planar form of a display device according to the present disclosure, and FIG. 12b is a cross-sectional view showing a curvature-variable state of the display device according to the present disclosure.

[0191] 12a, in the display device according to the present specification, the display unit 100 may be arranged (or realized) in a planar form having a curvature (R0) of 0 (zero). For example, as shown in FIG. 8, the rotation motor 224 of the curvature variable unit 200 may be in a state where the rotational movement is stopped based on the second limit signal of the second limit switch unit 227b.

[0192] The flat display unit 100 can be arranged (or realized) in a curved shape having a curvature (R1) other than 0 (zero) in response to a user's operation, as shown in Figures 1, 2, and 12b. For example, as shown in Figure 8, the arc member 210 of the curvature variable unit 200 is rotated up to 90 degrees in that position in conjunction with the rotational movement of the rotation motor 224 operated by the user in a state where it is laid down parallel to the rear surface of the display unit 100, and stands in the thickness direction (Z) of the display unit 100, and a pressure force generated at the tip of the arc member 210 that stands while rotating is applied to the display unit 100 through the fixing bracket 240, so that both sides of the display unit 100 can protrude toward the front (FD) of the display device more than the center. As a result, the display unit 100 can be changed into a curved shape having a curvature (R1) other than zero by protruding both sides of the display unit 100 toward the front (FD) of the display device from the center through the rotational movement of the arc member 210 erected in the thickness direction (Z) of the display unit 100. For example, as shown in Fig. 8, the rotation motor 224 of the curvature changing unit 200 that changes the display unit 100 into a curved shape can stop its rotational movement based on a first limit signal of a first limit switch 227a.

[0193] Conversely, as shown in FIG. 8, the arc member 210 of the curvature-variable unit 200 is upright in the thickness direction (Z) of the display unit 100, and then rotates up to 90 degrees in that position in response to the rotational movement of the rotation motor 224 in response to the user's operation, causing it to tilt sideways parallel to the rear surface of the display unit 100, so that the display unit 100 can be arranged (or realized) in a planar form having a curvature (R0) of 0 (zero) due to the elastic restoring force.

[0194] FIG. 13 is an enlarged view of the "B4" portion shown in FIG. 6, and is a view for explaining the slit according to the present specification.

[0195] 6, 7 and 13, the display device according to the present specification may further include a slit 125.

[0196] The slits 125 may be arranged to reduce stress applied to the vibration unit 500 when the curvature of the display unit 100 is changed. In addition, the slits 125 may be arranged to minimize deterioration of sound quality due to changes (or deviations) in the air gap (AG) at different positions between the display panel 110 and the back cover 120 according to the curvature of the display unit 100.

[0197] The slit 125 may be disposed in the vibration unit 500 and the overlapping back cover 120. According to an example, the slit 125 may be disposed between the pair of first and second sound generating units 511, 513 and penetrating the overlapping back cover 120.

[0198] The slit 125 may have a length parallel to the second direction (Y). The length of the slit 125 may be longer than the lengths of the first and second sound generating units 511, 513. One end of the slit 125 may be disposed between the pair of the first and second sound generating units 511, 513.

[0199] The slits 125 are formed to penetrate the back cover 120 vertically along the thickness direction (Z) of the display unit 100, thereby allowing the air gap (AG) between the display panel 110 and the back cover 120 (or the internal air gap) to communicate with the outside (or the external air gap) on the rear surface of the back cover 120. The slits 125 allow the air gap (AG) between the display panel 110 and the back cover 120 to communicate with the external air gap, thereby facilitating the flow of air between the internal air gap (AG) and the external air gap when the display panel 110 vibrates (or trembles). This allows the display panel 110 to stably vibrate, thereby increasing the bass band frequency characteristics and sound pressure characteristics due to the vibration of the display panel 110. For example, the bass band frequency may be 800 Hz or less, but is not limited thereto.

[0200] Fig. 14 is a diagram for explaining a curvature variable unit according to another example of the present specification, Fig. 15 is an enlarged view of a portion "B5" shown in Fig. 14, Fig. 16 is an enlarged view of a portion "B6" shown in Fig. 15, and Fig. 17 is an enlarged view of a portion "B7" shown in Fig. 15, which is an example in which the curvature variable unit is modified in the display device shown in Figs. 1 to 13. Therefore, in the following description, the remaining components except for the curvature variable unit are given the same reference numerals, and the accompanying duplicated description will be omitted or simplified.

[0201] 14 to 17, a curvature varying unit 200 according to another example of the present specification may include an arc member 210, a guide 230, a joint member 250, and a driver 270.

[0202] The arc member 210 may be disposed on the rear surface of the display unit 100. For example, the arc member 210 may be disposed on the rear surface of the back cover 120. The arc member 210 may be rotated by the driving unit 270, thereby allowing both sides of the display unit 100 to move forward or backward of the display device.

[0203] In one example, the arc member 210 can include a first arc member 211 and a second arc member 213 .

[0204] The first arc member 211 and the second arc member 213 may be the same as the first arc member 211 and the second arc member 213 shown in FIGS. 4 to 6, except that they are disposed on the rear surface of the back cover 120 so as to be parallel to each other.

[0205] Each of the first arc member 211 and the second arc member 213 may have a curved shape convex toward the first long side of the display unit 100 .

[0206] The center (or center of length) of the first arc member 211 may be adjacent to the first long side of the display unit 100, and both ends (or side ends) of the first arc member 211 may be adjacent to the vertical midline (VCL) of the display unit 100.

[0207] The center (or the middle of the length) of the second arc member 213 may be adjacent to the center of the rear of the display unit 100, and both ends (or both sides) of the second arc member 213 may be adjacent to the left and right corners of the lower part of the display unit 100.

[0208] The first arc member 211 and the second arc member 213 can be driven by the driving unit 270 to move in the same linear direction and rotate in the same rotational direction.

[0209] The guide 230 is disposed on the rear surface of the display unit 100 parallel to the second direction (Y) and can movably support the first and second middle portions of the arc member 210. Such a guide 230 can prevent the arc member 210 having a curved shape from floating when the arc member 210 rotates. Thus, the arc member 210 is movably disposed in a space between the rear surface of the display unit 100 and the middle portion of the guide 230, so that the arc member 210 can be prevented from floating by the guide 230 when the arc member 210 rotates, and both sides of the display unit 100 can be protruded toward the front of the display device using the guide 230 as a support.

[0210] The guides 230 according to an example embodiment are arranged in the third rear area (RA3) and the fourth rear area (RA4) of the display unit 100, respectively, and can movably support the first arc member 211 and the second arc member 213, respectively.

[0211] The guide 230 according to one example can include first through fourth guide members 235 , 236 , 237 , and 238 .

[0212] The first guide member 235 is disposed in the third rear area (RA3) of the display unit 100, and can be supported on the first middle portion of the first arc member 211 so as to be movably supported thereon.

[0213] One side and the other side of the first guide member 231 may be fixed to the first rear area (RA1) of the display unit 100 with the first arc member 211 therebetween. For example, one side and the other side of the first guide member 235 may be fixed to the first rear area (RA1) of the back cover 120 by a fastening member such as a screw or a bolt.

[0214] An intermediate portion between one side and the other side of the first guide member 235 may be disposed on the third rear area (RA3) of the back cover 120 so as to intersect with the first intermediate portion of the first arc member 211. Depending on the heights of the one side and the other side of the intermediate portion of the first guide member 235, it may be spaced apart from the rear surface of the back cover 120 at a distance greater than the diameter of the first arc member 211. Thus, the first intermediate portion of the first arc member 211 may be movable into the space between the intermediate portion of the first guide member 235 and the rear surface of the back cover 120.

[0215] The second guide member 236 is disposed in the fourth rear area (RA4) of the display unit 100, and may be movably supported at a second intermediate portion of the first arc member 211. The second guide member 236 is substantially the same as the first guide member 235, except that it is disposed in the fourth rear area (RA4) of the display unit 100, and is movably supported at a second intermediate portion of the first arc member 211, and therefore a duplicated description thereof will be omitted.

[0216] The third guide member 237 is disposed in the third rear area (RA3) of the display unit 100, and may be movably supported on a first intermediate portion of the second arc member 213. The third guide member 237 is substantially the same as the first guide member 235, except that it is disposed in the third rear area (RA3) of the display unit 100, and is movably supported on a first intermediate portion of the second arc member 213, and therefore a duplicated description thereof will be omitted.

[0217] The fourth guide member 238 is disposed in a fourth rear area (RA4) of the display unit 100, and may be movably supported at a second intermediate portion of the second arc member 213. The fourth guide member 238 is substantially the same as the first guide member 235, except that it is disposed in the fourth rear area (RA4) of the display unit 100, and is movably supported at a second intermediate portion of the second arc member 213, and therefore a duplicated description thereof will be omitted.

[0218] The joint member 250 is rotatably disposed in each of the third rear area (RA3) and the fourth rear area (RA4) of the display unit 100, and can rotatably support both ends of the arc member 210. For example, one end of the joint member 250 can be rotatably disposed in each of the third rear area (RA3) and the fourth rear area (RA4) of the display unit 100. The joint member 250 rotates due to the movement and rotation of the arc member 210 and transmits the pressure force generated at both ends of the arc member 210 to each of the third rear area (RA3) and the fourth rear area (RA4) of the display unit 100, thereby allowing both sides of the display unit 100 to protrude forward of the display device more than the center.

[0219] The joint member 250 according to an example may include first to fourth joint members 251 , 253 , 255 , and 257 .

[0220] The first joint member 251 is rotatably disposed in the third rear region (RA3) of the display unit 100, and can rotatably support one end (or a first end) of the first arc member 211. The first joint member 251 according to an example may include a pin portion inserted into one end of the first arc member 211, and a ring portion connected to a tip of the pin portion and rotatably coupled to the third rear region (RA3) of the display unit 100. The first joint member 251 can pressurize the third rear region (RA3) of the display unit 100 by a pressure force applied from one end of the first arc member 211.

[0221] The second joint member 253 is rotatably disposed in the fourth rear region (RA4) of the display unit 100, and can rotatably support the other end (or the second end) of the first arc member 211. The second joint member 253 according to an example may include a pin portion inserted into the other end of the first arc member 211, and a ring portion connected to the tip of the pin portion and rotatably coupled to the fourth rear region (RA4) of the display unit 100. The second joint member 253 can pressurize the fourth rear region (RA4) of the display unit 100 by a pressure force applied from the other end of the first arc member 211.

[0222] The third joint member 255 is rotatably disposed on the third rear region (RA3) of the display unit 100, and can rotatably support one end (or a first end) of the second arc member 213. The third joint member 255 according to an example may include a pin portion inserted into one end of the second arc member 213, and a ring portion connected to a tip of the pin portion and rotatably coupled to the third rear region (RA3) of the display unit 100. The third joint member 255 can pressurize the third rear region (RA3) of the display unit 100 by a pressure force applied from one end of the second arc member 213.

[0223] The fourth joint member 257 is rotatably disposed in the fourth rear region (RA4) of the display unit 100, and can rotatably support the other end of the second arc member 213. The fourth joint member 257 according to an example may include a pin portion inserted into the other end of the second arc member 213, and a ring portion connected to a tip of the pin portion and rotatably coupled to the fourth rear region (RA4) of the display unit 100. The fourth joint member 257 can pressurize the fourth rear region (RA4) of the display unit 100 by a pressure force applied from the other end of the second arc member 213.

[0224] The variable curvature unit 200 according to another example of the present specification may further include a fixed bracket 260.

[0225] The fixing bracket 260 may be disposed in each of the third rear region (RA3) and the fourth rear region (RA4) of the display unit 100 to rotatably support the joint member 250. For example, the fixing bracket 260 may be disposed in each of the third rear end portion and the fourth rear end portion of the display unit 100 and coupled (or fixed) to the rear of the back cover 120. When the first arc member 211 and the second arc member 213 rotate, the fixing bracket 260 may transmit the pressure force generated at the respective ends of the first arc member 211 and the second arc member 213 to the display unit 100. In this case, the fixing bracket 260 allows the respective ends of the first arc member 211 and the second arc member 213 to come into surface contact with the display unit 100, thereby preventing local damage to the display unit 100 due to local point contact between the respective ends of the first arc member 211 and the second arc member 213 and the display unit 100.

[0226] The fixing bracket 260 according to one example can include first and second fixing brackets 261,263.

[0227] The first fixing bracket 261 is disposed at an end portion of the third rear surface of the display unit 100, and can rotatably support the other side (or ring portion) of the joint member 250. For example, the first fixing bracket 261 is fixed to a third rear surface area (RA3) adjacent to a right end portion of the back cover 120, and can rotatably support the other sides (or ring portions) of the first joint member 251 and the third joint member 255.

[0228] The second fixing bracket 263 is disposed at an end portion of the fourth rear surface of the display unit 100, and can rotatably support the other side (or ring portion) of the joint member 250. For example, the second fixing bracket 263 is fixed to a fourth rear surface area (RA4) adjacent to a left end portion of the back cover 120, and can rotatably support the other sides (or ring portions) of the second joint member 253 and the fourth joint member 257.

[0229] The driver 270 may be disposed in a central area of ​​the rear surface of the display unit 100. The driver 270 may be disposed between the first arc member 211 and the second arc member 213.

[0230] The driving unit 270 can move the first arc member 211 and the second arc member 213 at the same time while rotating them at the same time. The driving unit 270 can move the first arc member 211 and the second arc member 213 at the same time in the same linear direction while rotating them at the same time in the same rotational direction. For example, the driving unit 270 can move the first arc member 211 linearly and rotate it up to 90 degrees in the first rotational direction, and at the same time move the second arc member 213 linearly and rotate it up to 90 degrees in the second rotational direction. Conversely, the driving unit 270 can move the first arc member 211 linearly and rotate it up to 90 degrees in the second rotational direction, and at the same time move the second arc member 213 linearly and rotate it up to 90 degrees in the first rotational direction.

[0231] The drive unit 270 can simultaneously move and rotate the first arc member 211 and the second arc member 213 via linear motion that is linked to the rotational motion of the rotary motor.

[0232] The drive unit 270 according to one example may include a guide plate 271 , a holder 272 , a holder link 273 , a sliding block 274 , at least one rotation motor 275 , and a gear assembly 276 .

[0233] The guide plate 271 may be disposed so as to overlap with the center of the rear surface of the display unit 100. For example, the guide plate 271 may be realized to have a certain width parallel to the first direction (X) and a certain length parallel to the second direction (Y), and may be disposed (or coupled) on the rear surface of the back cover 120 so as to overlap with the center (or the center of the length) of each of the first arc member 211 and the second arc member 213. Such a guide plate 271 may support at least one rotation motor 275 and a gear assembly 276, and slidably support the holder 272, the holder link 273, and the slide block 274.

[0234] The guide plate 271 according to one example can include a rail plate 271a and a sliding plate 271b.

[0235] The rail plate 271a is coupled to the rear surface of the back cover 120 so as to overlap with the rear center portion of the display unit 100, and can slidably support the sliding plate 271b. The rail plate 271a can include a guide rail for guiding the linear movement of the sliding plate 271b.

[0236] The sliding plate 271b can be slidably connected to the rail plate 271a. The sliding plate 271b can include a guide groove into which the guide rail of the rail plate 271a is inserted. The sliding plate 271b can slidably support the holder 272, the holder link 273, and the slide block 274.

[0237] The holder 272 is coupled to the sliding plate 271b of the guide plate 271 to rotatably support the center portion of the arc member 210. Thus, the center portion of the arc member 210 can be rotatably disposed between the sliding plate 271b and the holder 272. Additionally, the driving unit 270 according to an example may further include a bearing interposed between the center portion of the arc member 210 and the holder 272.

[0238] In one example, the holder 272 may include a first holder 272a coupled to the sliding plate 271b of the guide plate 271 and rotatably supporting a center portion of the first arc member 211, and a second holder 272b coupled to the guide plate 271 and rotatably supporting a center portion of the second arc member 213.

[0239] According to an example, both ends of each of the first holder 272a and the second holder 272b may be coupled to the sliding plate 271b by coupling members such as screws or bolts.

[0240] In one example, the driving unit 270 may further include a first bearing interposed between the center of the first arc member 211 and the first holder 272a, and a second bearing interposed between the center of the second arc member 213 and the second holder 272b.

[0241] The holder link 273 may rotatably support a center portion of the arc member 210. As an example, the holder link 273 may include a through hole through which the arc member 210 passes. As another example, the holder link 273 may include a "U" shaped cross-sectional structure surrounding a portion of the arc member 210. For example, the holder link 273 may be disposed to surround a portion of the holder 272, and fixed to the holder 272 by a fixing member (FM) such as a screw or a bolt.

[0242] In one example, the holder link 273 may include a first holder link (HL1) that rotatably supports a central portion of the first arc member 211, and a second holder link (HL2) that rotatably supports a central portion of the second arc member 213.

[0243] The first holder link (HL1) may include a "U" shaped cross-sectional structure surrounding a portion of the first arc member 211. For example, the first holder link (HL1) may be disposed to surround a portion of the first holder 272a and fixed to the first holder 272a by a fixing member (FM) such as a screw or a bolt.

[0244] The second holder link (HL2) may include a "U" shaped cross-sectional structure surrounding a portion of the second arc member 213. For example, the second holder link (HL2) may be disposed to surround a portion of the second holder 272b and fixed to the second holder 272b by a fixing member (FM) such as a screw or a bolt.

[0245] The sliding block 274 is connected to the holder link 273 and can move the holder link 273 linearly along the second direction (Y) when driven by the driving unit 270 .

[0246] The sliding block 274 according to an embodiment may be rotatably connected to the first holder link (HL1) and the second holder link (HL2). For example, one end of the sliding block 274 may be rotatably connected to the first holder link (HL1) by a first hinge pin (HP1). The other end of the sliding block 274 may be rotatably connected to the second holder link (HL2) by a second hinge pin (HP2). The sliding block 274 may linearly move the first holder link (HL1) and the second holder link (HL2) simultaneously in the same direction by the driving unit 270.

[0247] According to one example, the sliding block 274 can include a rack gear (RG).

[0248] According to an example, the rack gear (RG) may be provided on one side and the other side of the sliding block 274 parallel to the second direction (Y).

[0249] The rack gear (RG) according to an example may include a first rack gear (RG1) implemented on one side of the sliding block 274 and a second rack gear (RG2) implemented on the other side of the sliding block 274.

[0250] At least one rotation motor 275 can be disposed in a rear central region of the display unit 100 and supported by the guide plate 271. The at least one rotation motor 275 can provide a rotational force to a gear assembly 276 in response to a user's operation for varying the curvature of the display unit 100.

[0251] The driving unit 270 according to this example may include first and second rotary motors 275a, 275b (or a pair of rotary motors) to maintain balance, reduce noise, and ensure a driving force (or rotational force) margin.

[0252] The first and second rotation motors 275a, 275b can be disposed alongside each other with a gear assembly 276 therebetween. A drive shaft (or a rotation shaft) of the first rotation motor 275a and a drive shaft (or a rotation shaft) of the second rotation motor 275b can each be disposed adjacent to the first arc member 211. In this case, the first and second rotation motors 275a, 275b can rotate in the same direction as each other.

[0253] The gear assembly 276 may be disposed on the guide plate 271 and connected to the rotation motor 275. The gear assembly 276 may move and rotate the arc member 210 through the movement of the holder link 273 by linearly moving the slide block 274 in conjunction with the rotation motion of the rotation motor 275. For example, the gear assembly 276 may move and rotate each of the first arc member 211 and the second arc member 213 by linearly moving the slide block 274 in conjunction with the rotation motion of the rotation motor 275. The gear assembly 276 may be expressed as a gear assembly, a gear box, or a reduction gear unit, but is not necessarily limited thereto.

[0254] The gear assembly 276 according to one example can include a first pinion gear (PG1), a second pinion gear (PG2), and a rotation transmission part (RTP).

[0255] The first pinion gear (PG1) can be connected (or meshed) with the first rack gear (RG1) of the sliding block 274. The first pinion gear (PG1) can cause the first rack gear (RG1) to move linearly by rotating. For example, the first pinion gear (PG1) can rotate in a first rotational direction to cause the first rack gear (RG1) to move linearly in a first linear direction (Y+) parallel to the second direction (Y). Conversely, the first pinion gear (PG1) can rotate in a second rotational direction to cause the first rack gear (RG1) to move linearly in a second linear direction (Y-).

[0256] The second pinion gear (PG2) can be connected (or meshed) with the second rack gear (RG2) of the sliding block 274. The second pinion gear (PG2) can cause the second rack gear (RG2) to move linearly by rotating. For example, the second pinion gear (PG2) can rotate in a second rotational direction to cause the second rack gear (RG2) to move linearly in a first linear direction (Y+). Conversely, the second pinion gear (PG2) can rotate in the first rotational direction to cause the second rack gear (RG2) to move linearly in a second linear direction (Y-).

[0257] The rotation transmission unit (RTP) can transmit the rotational motion of the rotation motor 275 to the pinion gear (PG). The rotation transmission unit (RTP) can rotate the pinion gear (PG) by reducing the rotational speed of the rotation motor 275. For example, the rotation transmission unit (RTP) can transmit the rotational motion of the first rotation motor 275a to the first pinion gear (PG1) and transmit the rotational motion of the second rotation motor 275b to the second pinion gear (PG2).

[0258] The rotation transmission part (RTP) according to one example may include a first worm 276a, a first worm gear (WG1), a first spur gear (SG1), a second worm 276b, a second worm gear (WG2), and a second spur gear (SG2).

[0259] The first worm 276a can be coupled to a drive shaft of the first rotation motor 275a. The first worm 276a can rotate in a first rotation direction by the rotation of the first rotation motor 275a in a first rotation direction, or can rotate in a second rotation direction by the rotation of the first rotation motor 275a in a second rotation direction.

[0260] The first worm gear (WG1) is connected (or meshed) with the first worm 276a and can rotate by the rotational motion of the first worm 276a. For example, the first worm gear (WG1) can rotate only one gear when the first worm 276a rotates once. The rotation axis direction of the first worm gear (WG1) can be perpendicular to the rotation axis direction of the first worm 276a. For example, the rotation axis direction of the first worm 276a can be parallel to the second direction (Y), and the rotation axis direction of the first worm gear (WG1) can be parallel to the thickness direction (Z) of the back cover 120.

[0261] The first worm gear (WG1) according to an example may include a dual gear structure including a lower worm gear having a first size and an upper worm gear having a second size smaller than the first size. For example, in the first worm gear (WG1) having the dual gear structure, the lower worm gear may be coupled (or meshed) with the first worm 276a, and the upper worm gear may be coupled (or meshed) with the first spur gear (SG1).

[0262] The first spur gear (SG1) is connected (or meshed) with the first worm gear (WG1) and can rotate in a direction opposite to the direction of rotation of the first worm gear (WG1).

[0263] The first spur gear (SG1) according to an example may include a dual gear structure including a lower spur gear having a first size and an upper spur gear having a second size smaller than the first size. For example, in the first spur gear (SG1) having the dual gear structure, the lower spur gear may be coupled (or meshed) with the upper worm gear of the first worm gear (WG1), and the upper spur gear may be coupled (or meshed) with the first pinion gear (PG1).

[0264] The second worm 276b can be coupled to a drive shaft of the second rotation motor 275b. The second worm 276b can rotate in a first rotation direction by the rotation of the second rotation motor 275b in a first rotation direction, or can rotate in a second rotation direction by the rotation of the second rotation motor 275b in a second rotation direction.

[0265] The second worm gear (WG2) is connected (or meshed) with the second worm 276b and can rotate by the rotational motion of the second worm 276b. For example, the second worm gear (WG2) can rotate only one gear when the second worm 276b rotates once. The rotation axis direction of the second worm gear (WG2) can be perpendicular to the rotation axis direction of the second worm 276b. For example, the rotation axis direction of the second worm 276b can be parallel to the second direction (Y), and the rotation axis direction of the second worm gear (WG2) can be parallel to the thickness direction (Z) of the back cover 120.

[0266] The second worm gear (WG2) according to an example may include a dual gear structure including a lower worm gear having a first size and an upper worm gear having a second size smaller than the first size. For example, in the second worm gear (WG2) having the dual gear structure, the lower worm gear may be coupled (or meshed) with the second worm 276b, and the upper worm gear may be coupled (or meshed) with the second spur gear (SG2).

[0267] The second spur gear (SG2) is connected (or meshed) with the second worm gear (WG2) and can rotate in a direction opposite to the direction of rotation of the second worm gear (WG2).

[0268] The second spur gear (SG2) according to an example may include a dual gear structure including a lower spur gear having a first size and an upper spur gear having a second size smaller than the first size. For example, in the second spur gear (SG2) having the dual gear structure, the lower spur gear may be coupled (or meshed) with the upper worm gear of the second worm gear (WG2), and the upper spur gear may be coupled (or meshed) with the second pinion gear (PG2).

[0269] Alternatively, the drive unit 270 in this example can be realized by including only the first rotary motor 275a, in which case the second rack gear (RG2), the second rotary motor 275b, the second pinion gear (PG2), the second worm 276b, the second worm gear (WG2), and the second spur gear (SG2) described above can be omitted.

[0270] The driving unit 270 of the curvature varying unit 200 according to an example of the present specification may further include a limit switch unit 277.

[0271] The limit switch unit 277 can be disposed on the guide plate 271 to limit the distance of linear motion of the sliding block 274. For example, the limit switch unit 277 can be realized to limit the maximum distance of linear motion of the rack gear (RG) by physical contact with the sliding block 274.

[0272] According to one example, the limit switch portion 277 can include a first limit switch portion 277a and a second limit switch portion 277b.

[0273] The first limit switch portion 277a can limit the maximum linear motion distance of the sliding block 274 along the second linear direction (Y-). The first limit switch portion 277a can limit the maximum rotation angle of the arc member 210 or the maximum curvature of the display unit 100.

[0274] According to one example, the first limit switch portion 277a may include a first limit switch (LS1) and a first stopper (SP1).

[0275] The first limit switch (LS1) is fixed to the guide plate 271 overlapping with the through slit 274a penetrating the sliding block 274, and can be disposed within the through slit 274a. For example, the first limit switch (LS1) is disposed on the rail plate 271a of the guide plate 271 so as to be spaced a certain distance from the first arc member 211, and can be disposed within the through slit 274a penetrating the sliding plate 271b and the slide block 274.

[0276] The first stopper (SP1) may be a first end sidewall of the through slit 274a disposed in the sliding block 274, which is parallel to the first direction (X) and adjacent to the first arc member 211.

[0277] The first limit switch (LS1) can generate a first limit signal to be provided to the curvature variable control circuit when it physically contacts a first end side wall of the through slit 274a disposed in the sliding block 274 that moves linearly along the second linear direction (Y-). The curvature variable control circuit can stop the rotation of the rotation motor 275 in response to the first limit signal provided from the first limit switch (LS1).

[0278] The second limit switch portion 277b can limit a maximum linear motion distance of the slide block 274 along the first linear direction (Y+). According to an example, the second limit switch portion 277b can include a second limit switch (LS2) and a second stopper (SP2).

[0279] The second limit switch (LS2) can be fixed to the guide plate 271 between the first limit switch (LS1) and the second arc member 213 and disposed in the through slit 274a. For example, the second limit switch (LS2) can be disposed on the rail plate 271a of the guide plate 271 so as to be adjacent to the first limit switch (LS1), and disposed in the through slit 274a penetrating the sliding plate 271b and the slide block 274.

[0280] The second stopper (SP2) may be a second end sidewall of the through slit 274a disposed in the sliding block 274, which is parallel to the first direction (X) and adjacent to the second arc member 213.

[0281] The second limit switch (LS2) can generate a second limit signal and provide it to the curvature variable control circuit when it comes into physical contact with a second end side wall of the through slit 274a arranged in the sliding block 274 that moves linearly along the first linear direction (Y+). The curvature variable control circuit can stop the rotation of the rotation motor 275 in response to the second limit signal provided from the second limit switch (LS2).

[0282] The curvature varying unit 200 according to another example of the present specification may further include a gear box 278.

[0283] The gear box 278 may be coupled to the rail plate 271 a of the guide plate 271 or the rear surface of the back cover 120 to support the driving unit 270 .

[0284] The gear box 278 can be supported or attached to a post of a stand. To this end, the gear box 278 can include a plurality of attachment couplings 278a. The plurality of attachment couplings 278a can be disposed on each of the upper and lower sides of the gear box 278 and can include a symmetrical structure with respect to the slide block 274.

[0285] FIG. 18a is a cross-sectional view showing a planar form of a display device according to the present disclosure, and FIG. 18b is a cross-sectional view showing a curvature-variable state of the display device according to the present disclosure.

[0286] 18a, in the display device according to the present specification, the display unit 100 may be arranged (or realized) in a planar form having a curvature (R0) of 0 (zero). For example, as shown in FIG 15, the rotation motor 275 of the curvature variable unit 200 may be in a state where the rotational movement is stopped based on the second limit signal of the second limit switch 277b.

[0287] The flat display unit 100 can be arranged (or realized) in a curved shape having a curvature (R1) other than 0 (zero) as shown in Fig. 1, Fig. 2, and Fig. 18b in response to a user's operation. For example, as shown in Fig. 15, the arc member 210 of the curvature variable unit 200 is laid down parallel to the rear surface of the display unit 100, and when the slide block 274 moves linearly in the second linear direction (Y-) in conjunction with the rotational movement of the rotation motor 275 according to the user's operation, the arc member 210 moves in the second linear direction (Y-) and rotates in the first rotational direction up to 90 degrees to stand in the thickness direction (Z) of the display unit 100, and a pressure force generated at the tip of the arc member 210 that stands while rotating is applied to the display unit 100 via the joint member 250 and the fixing bracket 260, so that both sides of the display unit 100 can protrude toward the front (FD) of the display device more than the center. As a result, the display unit 100 can be changed into a curved shape having a curvature (R1) other than zero by protruding both sides of the display unit 100 toward the front (FD) of the display device from the center due to the linear motion of the arc member 210 and the rotational motion of the arc member 210 standing in the thickness direction (Z) of the display unit 100. For example, as shown in Fig. 15, the rotation motor 275 of the curvature changing unit 200 that changes the display unit 100 into a curved shape can stop its rotational motion based on a first limit signal of a first limit switch 277a.

[0288] Conversely, as shown in FIG. 15, the arc member 210 of the curvature-variable unit 200 moves in the first linear direction (Y+) as the slide block 274 moves linearly in the first linear direction (Y+) in response to the rotational movement of the rotation motor 275 in response to the user's operation, and rotates in a second rotational direction of up to 90 degrees to be laid down parallel to the rear surface of the display unit 100, so that the display unit 100 can be positioned (or realized) in a planar form having a curvature of 0 (zero) (R0) due to the elastic restoring force.

[0289] FIG. 19 is a diagram for explaining a position adjustment unit according to an example of the present specification.

[0290] 1 and 19, a position adjustment unit 700 according to one example of the present specification can be implemented to raise (Y+) or lower (Y-) the height of a display unit 100 mounted on a stand 300.

[0291] The position adjustment unit 700 may include a support bracket 710 and a display lift unit 720 .

[0292] The support bracket 710 can be coupled to the rear surface of the display unit 100. The support bracket 710 according to an example can be coupled to the gear box 278 of the variable curvature unit 200 arranged on the rear surface of the display unit 100 shown in Fig. 14 and Fig. 15. For example, the support bracket 710 can be coupled to or support the gear box 278 by fastening members such as screws or bolts. The fastening members can be coupled to a plurality of mounting coupling portions 278a arranged on the gear box 278.

[0293] The display lift unit 720 may be disposed on the post 330 of the stand 300 and connected to the support bracket 710. The display lift unit 720 may adjust the height of the display unit 100 attached to the support bracket 710 by raising (Y+) or lowering (Y-) the support bracket 710 in the second direction (Y) according to a user's operation of a lift adjustment knob 727. For example, the display lift unit 720 may raise or lower the height of the display unit 100 from a reference position (Pref) by raising and lowering the support bracket 710 using a ball screw method.

[0294] The display lift unit 720 according to an example may include a connection frame 721 , a lift shaft 723 , a lift guide 725 , and a lift adjustment knob 727 .

[0295] The connection frame 721 is disposed in the thickness direction (Z) of the display unit 100 , and can be coupled to the support bracket 710 by penetrating the inner wall of the post 330 of the stand 300 .

[0296] The lift shaft 723 is arranged inside the post 330 in parallel with the second direction (Y) so as to be liftable and lowerable, and can be coupled to the connection frame 721 .

[0297] The lifting guide 725 is disposed inside the post 330 parallel to the second direction (Y) and can guide the lifting shaft 723 to move up and down. For example, the lifting guide 725 can include a guide rail that guides the lifting shaft 723 to move up and down. In this case, the lifting shaft 723 includes a guide groove into which the guide rail of the lifting guide 725 is inserted, and can move up and down in the second direction (Y) along the guide rail of the lifting guide 725.

[0298] The lift adjustment knob 727 is rotatably disposed on the upper surface of the post 330 and can be connected to the upper side of the lift shaft 723. The lift adjustment knob 727 can be rotated in a first rotation direction by a user's operation to raise the lift shaft 723 (Y+), and can be rotated in a second rotation direction by a user's operation to lower the lift shaft 723 (Y-). To this end, the lift adjustment knob 727 can include a screw thread portion 727a, and the lift shaft 723 can include a screw hole 723a disposed on an upper side and connected (or meshed) with the screw thread portion 727a of the lift adjustment knob 727.

[0299] The screw thread portion 727a of the lift adjustment knob 727 rotates with the rotation of the lift adjustment knob 727, and can linearly move the lift shaft 723 in the second direction (Y). For example, when the lift adjustment knob 727 rotates in a first rotation direction, the screw thread portion 727a rotates in the first rotation direction, and can linearly move (or lift) the lift shaft 723 in the second direction (Y). Conversely, when the lift adjustment knob 727 rotates in the second rotation direction, the screw thread portion 727a rotates in the second rotation direction, and can linearly move (or lift) the lift shaft 723 in the second direction (Y).

[0300] The position adjustment unit 700 according to an example of the present specification can be realized so that the display unit 100 in the vertical state (Pv) attached to the stand 300 can be tilted at a certain angle (θ1, θ2). For this reason, the position adjustment unit 700 can further include a display tilt unit 730.

[0301] The display tilt unit 730 is disposed between the support bracket 710 and the display lift unit 720, and can tilt the display unit 100 at a certain angle (θ1, θ2) according to a user's operation.

[0302] The display tilt unit 730 according to one example can include a tilt housing 731 , a support frame 733 , a ball nut 735 , a tilt adjustment knob 737 , and a knob support 739 .

[0303] The tilt housing 731 can be coupled to a back surface of the support bracket 710. For example, the tilt housing 731 can be coupled to a back surface of the support bracket 710 between the support bracket 710 and the post 330 of the stand 300.

[0304] The support frame 733 may be supported (or coupled) by the connection frame 721 of the display lift unit 720, and rotatably supported by the tilt housing 731. The tilt housing 731 may be rotatably supported by the support frame 733 via the tilt shaft 732.

[0305] A ball nut 735 (or ball screw nut) can be fixed to the upper interior side of the tilt housing 731 .

[0306] The tilt adjustment knob 737 can be disposed on the back of the tilt housing 731 so as to couple (or mate) with the ball nut 735. The tilt adjustment knob 737 can include a ball screw that passes through the back of the tilt housing 731 and couples (or mates) with the ball nut 735.

[0307] The tilt adjustment knob 737 can be rotated in a first rotation direction by a user to advance the ball nut 735 in the thickness direction (Z) of the display unit 100, thereby tilting the tilt housing 731 at a first angle (θ1) around the tilt shaft 732 as a rotation axis. For example, when the tilt adjustment knob 737 rotates in the first rotation direction, the display unit 100 in the vertical state (Pv) can be tilted at the first angle (θ1) from the vertical state (Pv) by the upper part protruding forward of the display device more than the lower part.

[0308] Conversely, the tilt adjustment knob 737 can be rotated in a second rotation direction by the user to move the ball nut 735 backward in the thickness direction (Z) of the display unit 100, thereby returning the tilt housing 731 to the vertical state (Pv) or tilting it at a second angle (θ2) from the vertical state (Pv) around the tilt shaft 732 as a rotation axis. For example, when the tilt adjustment knob 737 is rotated in the second rotation direction, the display unit 100 in the vertical state (Pv) can be tilted at the second angle (θ2) from the vertical state (Pv) by the lower part protruding forward of the display device more than the upper part.

[0309] Knob support portion 739 may be coupled to the upper side of support frame 733 or may protrude from the upper side of support frame 733 to rotatably support tilt adjustment knob 737. Knob support portion 739 may rotatably support a protruding shaft protruding from the rear surface of tilt adjustment knob 737. As a result, tilt adjustment knob 737 can move linearly by rotating at that position using knob support portion 739 as a support base.

[0310] In this manner, the display device including the position adjustment unit 700 of this embodiment can provide a viewing height and angle that suits the user's preferences by adjusting the height and angle of the display unit 100 through user operation.

[0311] Fig. 20 is a diagram for explaining a curvature variable unit according to another example of the present specification, Fig. 21 is an enlarged view of a portion "B8" shown in Fig. 20, Fig. 22 is an enlarged view of a portion "B9" shown in Fig. 20, and Fig. 23 is an enlarged view of a portion "B10" shown in Fig. 20, which is an example in which the curvature variable unit is modified in the display device shown in Figs. 1 to 13. Therefore, in the following description, the remaining components except for the curvature variable unit are given the same reference numerals, and the accompanying duplicated description will be omitted or simplified.

[0312] 20 to 23, a curvature varying unit 200 according to yet another example herein may include an arc member 210, a guide 230, and a driver 220. As shown in FIG.

[0313] The arc member 210 may be disposed on the rear surface of the display unit 100. For example, the arc member 210 may be disposed on the rear surface of the back cover 120. The arc member 210 may be rotated by the driving unit 220, thereby allowing both sides of the display unit 100 to move forward or backward of the display device.

[0314] In one example, the arc member 210 can include a first arc member 211 and a second arc member 213 .

[0315] The first arc member 211 may have a convex curved shape toward a first long side of the display unit 100. The center (or the center of the length) of the first arc member 211 may be adjacent to the first long side of the display unit 100, and both ends (or both sides) of the first arc member 211 may be adjacent to a vertical midline (VCL) of the display unit 100.

[0316] The second arc member 213 may have a convex curved shape toward the second long side of the display unit 100. The center (or the center of the length) of the second arc member 213 may be adjacent to the second long side of the display unit 100, and both ends (or both sides) of the second arc member 213 may be adjacent to a vertical midline (VCL) of the display unit 100.

[0317] The first arc member 211 and the second arc member 213 may be rotated in opposite directions by driving the driving unit 220. According to an example, the first arc member 211 and the second arc member 213 may be rotated in opposite directions at their respective positions by driving the driving unit 220. For example, the first arc member 211 may be rotated in a first rotation direction at their respective positions by driving the driving unit 220, and at the same time, the second arc member 213 may be rotated in a second rotation direction at their respective positions by driving the driving unit 220. Conversely, the first arc member 211 may be rotated in a second rotation direction at their respective positions by driving the driving unit 220, and at the same time, the second arc member 213 may be rotated in a first rotation direction at their respective positions by driving the driving unit 220.

[0318] The space in the central part of the rear of the display unit 100, which is disposed between the centers of the first arc member 211 and the second arc member 213, can be relatively large because the centers of the first arc member 211 and the second arc member 213 are disposed adjacent to the long sides of the display unit 100. This can increase the utilization of the rear space of the display unit 100 in which mechanical components or circuit components are disposed, and can facilitate the arrangement of the mechanical components or circuit components.

[0319] The guide 230 is disposed on the rear surface of the display unit 100 so as to be parallel to the second direction (Y) and can movably support the first and second middle portions of the arc member 210. Such a guide 230 can prevent the arc member 210, which has a curved shape, from floating when the arc member 210 rotates. Thus, the arc member 210 is movably disposed in a space between the rear surface of the display unit 100 and the middle portion of the guide 230, so that the arc member 210 can be prevented from floating by the guide 230 when the arc member 210 rotates, and both sides of the display unit 100 can be protruded toward the front of the display device using the guide 230 as a support.

[0320] The guide 230 according to an example is disposed in each of the third rear area (RA3) and the fourth rear area (RA4) of the display unit 100, and can movably support the first arc member 211 and the second arc member 213, respectively. The guide 230 according to an example may include first to fourth guide members 235, 236, 237, and 238. The first to fourth guide members 235, 236, 237, and 238 have substantially the same functions as the first to fourth guide members shown in FIG. 14, but have different structures, so that a duplicated description thereof will be omitted. Alternatively, the first to fourth guide members 235, 236, 237, and 238 shown in FIG. 20 may be realized to have substantially the same structures as the first to fourth guide members shown in FIG. 14.

[0321] The first and third guide members 235, 237 disposed in the third rear area (RA3) of the display unit 100 can be arranged alongside each other with the first vertical rigid member 161 therebetween. The second and fourth guide members 236, 238 disposed in the fourth rear area (RA4) of the display unit 100 can be arranged alongside each other with the second vertical rigid member 163 therebetween.

[0322] Each of the first vertical rigidity member 161 and the second vertical rigidity member 163 may be disposed on the rear surface of the display unit 100 so as to be parallel to the second direction (Y). According to an example, each of the first vertical rigidity member 161 and the second vertical rigidity member 163 may be realized to have a constant width parallel to the first direction (X) and a constant length parallel to the second direction (Y). For example, each of the first vertical rigidity member 161 and the second vertical rigidity member 163 may be made of a metal material, but is not limited thereto. Each of the first vertical rigidity member 161 and the second vertical rigidity member 163 may be fixed to the rear surface of the display unit 100 by a fastening member such as a screw or a bolt, but is not limited thereto, and may be fixed to the rear surface of the display unit 100 by a fastening member such as a double-sided tape. Each of the first vertical rigidity member 161 and the second vertical rigidity member 163 may minimize or prevent vertical distortion when the curvature of the display unit 100 is changed.

[0323] The driver 220 may be disposed in a central area of ​​the rear surface of the display unit 100. The driver 220 may be disposed between the first arc member 211 and the second arc member 213.

[0324] The driver 220 can rotate the first arc member 211 and the second arc member 213 simultaneously. The driver 220 can rotate the first arc member 211 and the second arc member 213 simultaneously in opposite rotation directions at their positions. For example, the driver 220 can rotate the first arc member 211 at its position in a first rotation direction up to 90 degrees and simultaneously rotate the second arc member 213 at its position in a second rotation direction up to 90 degrees. Conversely, the driver 220 can rotate the first arc member 211 at its position in a second rotation direction up to 90 degrees and simultaneously rotate the second arc member 213 at its position in the first rotation direction up to 90 degrees.

[0325] The drive unit 220 can rotate the first arc member 211 and the second arc member 213 simultaneously in their respective positions via a linear motion that is linked to the rotational motion of the rotary motor.

[0326] The drive unit 220 according to an example may include a support plate 221 , a holder 222 , a fixed link 223 , at least one rotation motor 224 , and a gear assembly 225 .

[0327] The support plate 221 may be disposed so as to overlap with the center of the rear surface of the display unit 100. For example, the support plate 221 may be realized to have a certain width parallel to the first direction (X) and a certain length parallel to the second direction (Y), and may be disposed (or coupled) on the rear surface of the back cover 120 so as to overlap with the center (or center of length) of each of the first arc member 211 and the second arc member 213. Such a support plate 221 may support the holder 222, and at least one rotation motor 224 and gear assembly 225.

[0328] The holder 222 is coupled to the support plate 221 and can rotatably support the center of the arc member 210. The holder 222 according to an example may include a first holder 222a coupled to the support plate 221 and rotatably supporting the center of the first arc member 211, and a second holder 222b coupled to the support plate 221 and rotatably supporting the center of the second arc member 213. The first holder 222a and the second holder 222b have substantially the same functions as the first and second holders 222a and 222b shown in Figs. 8 to 10, but have different structures, and therefore a duplicated description thereof will be omitted. Alternatively, the first holder 222a and the second holder 222b shown in Figs. 21 to 23 may be realized to have substantially the same structures as the first and second holders 222a and 222b shown in Figs. 8 to 10.

[0329] The fixed link 223 may be fixed to the center of the arc member 210. For example, the fixed link 223 may be fixed to the center of the arc member 210 by a fixing member (FM), such as a screw or a bolt.

[0330] According to one example, the fixed link 223 may include a first fixed link (FL1) fixed to the center of the first arc member 211 and a second fixed link (FL2) fixed to the center of the second arc member 213.

[0331] Each of the first fixed link (FL1) and the second fixed link (FL2) may include a pair of link fixing parts (LFP) protruding side by side with the holders 222a, 222b in between. The pair of link fixing parts (LFP) may be fixed to the center of the corresponding arc members 211, 213 by the fixing member (FM).

[0332] The first fixed link (FL1) may be disposed on an outer surface of the first arc member 211 facing the first long side of the display unit 100, and may be disposed inclined at a certain angle (θ) with respect to the second direction (Y), as shown in FIG. 24. The first fixed link (FL1) may be inclined at a certain angle (θ) from the rear surface of the display unit 100. For example, the first fixed link (FL1) may be inclined 45 degrees counterclockwise from a vertical line extended from the central axis of the first arc member 211 in the thickness direction (Z) of the display unit 100. In this case, the angle between the extension line connecting the central axis of the first fixed link (FL1) and the central axis of the first arc member 211 and the rear surface of the display unit 100 may be 45 degrees.

[0333] The second fixed link (FL2) may be disposed on the outer surface of the second arc member 213 facing the second long side of the display unit 100, as shown in FIG. 24, and may be disposed inclined at a certain angle (θ) in the second direction (Y). The second fixed link (FL2) may be inclined at a certain angle (θ) from the rear surface of the display unit 100. For example, the second fixed link (FL2) may be inclined 45 degrees clockwise from a vertical line extended from the central axis of the second arc member 213 in the thickness direction (Z) of the display unit 100. In this case, the angle between the extension line connecting the central axis of the second fixed link (FL2) and the central axis of the second arc member 213 and the rear surface of the display unit 100 may be 45 degrees.

[0334] At least one rotation motor 224 may be disposed in a rear central region of the display unit 100 and supported by the support plate 221. The at least one rotation motor 224 may provide a rotational force to the gear assembly 225 in response to a user's operation for varying the curvature of the display unit 100.

[0335] The driving unit 220 according to the present embodiment may include first and second rotary motors 224a, 224b (or a pair of rotary motors) to maintain balance, reduce noise, and ensure a driving force (or rotational force) margin.

[0336] The first and second rotation motors 224a, 224b may be disposed alongside each other with a gear assembly 225 therebetween. The drive shaft (or rotation shaft) of the first rotation motor 224a and the drive shaft (or rotation shaft) of the second rotation motor 224b may be disposed adjacent to or facing the first arc member 211. In this case, the first and second rotation motors 224a, 224b may rotate in the same direction as each other.

[0337] According to one example, the first and second rotary motors 224a, 224b may be arranged rotated at a certain angle so that the drive shaft (or rotary shaft) faces the short side of the display unit 100 on the rear surface of the display unit 100.

[0338] The gear assembly 225 may be disposed on the support plate 221 and connected to the rotary motor 224. The gear assembly 225 may rotate the fixed link 223 in conjunction with the rotary motion of the rotary motor 224, and may rotate the arc member 210 at its position through the rotation of the fixed link 223. For example, the gear assembly 225 may rotate the first fixed link (FL1) and the second fixed link (FL2) of the fixed link 223 in opposite directions in conjunction with the rotary motion of the rotary motor 224, thereby simultaneously rotating the first arc member 211 and the second arc member 213 at their positions. The gear assembly 225 may be expressed as a gear assembly or a reduction gear unit, but is not necessarily limited thereto.

[0339] The gear assembly 225 according to an embodiment may include a first rack gear (RG1), a second rack gear (RG2), a pinion gear (PG), and a rotation transmission part (RTP). The gear assembly 225 including the first rack gear (RG1), the second rack gear (RG2), the pinion gear (PG), and the rotation transmission part (RTP) is substantially the same as the gear assembly shown in FIG. 8 except for the gear arrangement structure, so the same reference numerals are given to the gear assembly 225 and a duplicated description thereof will be omitted.

[0340] The variable curvature unit 200 according to an example may further include a fixing bracket 240 .

[0341] The fixing bracket 240 is disposed at an angle on each of the third rear area (RA3) and the fourth rear area (RA4) of the display unit 100, and can movably support the distal ends of the first arc member 211 and the second arc member 213. The fixing bracket 240 movably supports the distal ends of the first arc member 211 and the second arc member 213, and can guide the movement of the distal ends of the first arc member 211 and the second arc member 213. For this purpose, the fixing bracket 240 includes side grooves having a certain depth from the inner surface so that the distal ends of the first arc member 211 and the second arc member 213 can be movably inserted therein.

[0342] The fixing bracket 240 may be disposed on the rear surface of the display unit 100 inclined at a certain angle with respect to the second direction (Y) rather than parallel to the second direction (Y). According to an example, the fixing bracket 240 may be disposed inclined to correspond to a moving trajectory of the tips of the arc members 211, 213 when the arc members 211, 213 rotate. For example, when the display unit 100 is in a flat form, the tips of the arc members 211, 213 may be disposed adjacent to the other end of the fixing bracket 240. Also, when the display unit 100 is changeable from a flat form to a curved form, the tips of the arc members 211, 213 may move from the other end to one end of the fixing bracket 240 due to the rotation of the arc members 211, 213.

[0343] The fixing bracket 240 according to an example may include first to fourth fixing brackets 241 , 242 , 243 , and 244 .

[0344] The first to fourth fixing brackets 241, 242, 243, and 244 have a similar structure to the first to fourth fixing brackets 241, 242, 243, and 244 shown in FIG. 6, except that they are arranged on the rear surface of the display unit 100 not parallel to the second direction (Y) but tilted at a certain angle relative to the second direction (Y). Therefore, the same symbols are given to them and redundant explanations are omitted.

[0345] One end of each of the first to fourth fixing brackets 241, 242, 243, and 244 may be disposed adjacent to a corner portion of the display unit 100 or a corner portion of the back cover 120. The other end of each of the first to fourth fixing brackets 241, 242, 243, and 244 may be disposed inclined toward a rear middle region of the display unit 100 from the one end.

[0346] Based on the second direction (Y), the first to fourth fixing brackets 241, 242, 243, and 244 may be arranged at an incline to correspond to the movement trajectory of the tip of the arc members 211, 213 when the arc members 211, 213 rotate. In this case, side grooves (or side pockets) arranged on the inner surfaces of the first to fourth fixing brackets 241, 242, 243, and 244, into which the tip of the arc members 211, 213 is inserted, may have a certain depth.

[0347] For example, when the first to fourth fixing brackets 241, 242, 243, 244 are arranged in line with the second direction (Y) as shown in FIG. 8, each of the first to fourth fixing brackets 241, 242, 243, 244 must have a side groove that is deep overall along the movement trajectory of the tip of the arc members 211, 213, and therefore each of the first to fourth fixing brackets 241, 242, 243, 244 must have a relatively wide width. On the other hand, when the first to fourth fixing brackets 241, 242, 243, and 244 are each arranged at an angle rather than parallel to the second direction (Y) along the movement trajectory of the tip of the arc members 211 and 213, as in FIG. 20, the first to fourth fixing brackets 241, 242, 243, and 244 can each have a side groove having a shallow depth overall, thereby allowing the first to fourth fixing brackets 241, 242, 243, and 244 to have a relatively narrow width.

[0348] As shown in FIGS. 22 and 23, the driving section 220 of the curvature varying unit 200 according to an example of the present specification may further include a guide rail 226.

[0349] The guide rail 226 is disposed between the support plate 221 and the rack gears (RG1, RG2) and can guide the linear motion of the rack gears (RG1, RG2).

[0350] The guide rail 226 according to an example may include a first guide rail 266a disposed between the support plate 221 and the first rack gear (RG1), and a second guide rail 226b disposed between the support plate 221 and the second rack gear (RG2). The first guide rail 266a and the second guide rail 226b are the same as those described above with reference to Figs. 22 and 23, and therefore the same reference numerals are used therefor, and a duplicated description thereof will be omitted.

[0351] The driving unit 220 of the curvature varying unit 200 according to an example of the present specification may further include a limit switch unit 227.

[0352] The limit switch unit 227 is disposed on the support plate 221 adjacent to the rack gear (RG) and can limit the maximum distance of linear motion of the rack gear (RG). For example, the limit switch unit 227 can be realized to limit the maximum distance of linear motion of the rack gear (RG) by physical contact with the rack gear (RG).

[0353] According to one example, the limit switch portion 227 can include a first limit switch portion 227a and a second limit switch portion 227b.

[0354] The first limit switch portion 227a can limit the maximum linear motion distance of the first rack gear (RG1) along the first linear direction (Y+). The first limit switch portion 227a can limit the maximum rotation angle of the arc member 210 or the maximum curvature of the display unit 100.

[0355] The first limit switch unit 227a according to an example may include a first limit switch (LS1) disposed on the support plate 221 adjacent to the first arc member 211, and a first stopper (SP1) protruding from an outer surface of the first rack gear (RG1). The first limit switch (LS1) may generate a first limit signal and provide it to the curvature variable control circuit when the first limit switch (LS1) physically contacts the first stopper (SP1) disposed on the first rack gear (RG1) that moves linearly along the first linear direction (Y+). The curvature variable control circuit may stop the rotation of the rotation motor 224 in response to the first limit signal provided from the first limit switch (LS1).

[0356] The second limit switch portion 227b can limit the maximum linear motion distance of the second rack gear (RG2) along the second linear direction (Y-).

[0357] The second limit switch unit 227b according to an example may include a second limit switch (LS2) disposed on the support plate 221 adjacent to the pinion gear (PG) and a second stopper (SP2) protruding from an outer surface of the second rack gear (RG2). The second limit switch (LS2) may generate a second limit signal and provide it to the curvature variable control circuit when the second limit switch (LS2) physically contacts the second stopper (SP2) disposed on the second rack gear (RG2) that moves linearly along the first linear direction (Y+). The curvature variable control circuit may stop the rotation of the rotation motor 224 in response to the second limit signal provided from the second limit switch (LS2).

[0358] The curvature varying unit 200 according to another example of the present specification may further include a gear box 278.

[0359] The gearbox 278 may be coupled to the support plate 221 to support the drive portion 270 .

[0360] The gear box 278 can be supported or attached to a post of a stand. To this end, the gear box 278 can include a plurality of attachment couplings 278a. The plurality of attachment couplings 278a can be disposed on each of the upper and lower sides of the gear box 278 and can include a symmetrical structure with respect to the slide block 274.

[0361] Additionally, the gear box 278 can be coupled to a position adjustment unit 700 shown in Fig. 19. In this case, in the display device according to this example, with the display unit 100 attached to the stand 300 via the position adjustment unit 700, the height and angle of the display unit 100 can be adjusted by the user's operation of the position adjustment unit 700.

[0362] In this manner, a display device including a curvature changing unit 200 according to another example of the present specification can be changed from a flat form to a curved form or from a curved form to a flat form by driving the curvature changing unit 200 as shown in Figures 12a and 12b, so a duplicated description thereof will be omitted.

[0363] The display device according to the present specification can be described as follows.

[0364] A display device according to some examples of this specification may include a display unit including a display panel for displaying images, a curvature variable unit arranged on the rear side of the display unit for varying the curvature of the display unit, and a vibration unit arranged on the rear side of the display unit for vibrating the display panel.

[0365] According to some examples herein, the display unit may include a back cover disposed on the rear side of the display panel and supporting the vibration unit, and the back cover may include a slit overlapping with the vibration unit.

[0366] According to some examples herein, the vibration unit may include a pair of sound-generating units coupled to the back cover to vibrate the display panel, and the slit may be disposed in the back cover overlapping between the pair of sound-generating units.

[0367] According to some examples herein, the sound-generating unit may include a bobbin and a coil wound on the bobbin, which may pass through the back cover and be coupled to the rear surface of the display panel.

[0368] According to some examples herein, the vibrating unit may include a first vibrating unit disposed in a first region of the display unit and a second vibrating unit disposed in a second region of the display unit.

[0369] According to some examples herein, the display unit may include a back cover disposed on a rear surface of the display panel and supporting a first vibration unit and a second vibration unit, each of which includes a first sound-generating unit and a second sound-generating unit arranged alongside each other, and the back cover may include a slit disposed between the first sound-generating unit and the second sound-generating unit.

[0370] According to some examples in this specification, the curvature variable unit may include an arc member arranged on a rear surface of the display unit, a drive unit arranged on a central portion of the rear surface of the display unit for rotating the central portion of the arc member, a first guide member arranged on the rear surface of the display unit for supporting the arc member between the central portion and one end, and a second guide member arranged on the rear surface of the display unit for supporting the arc member between the central portion and the other end.

[0371] According to some examples in the present specification, the curvature variable unit may include a first arc member and a second arc member arranged in a first rear region and a second rear region of the display unit parallel to a first direction, respectively, guides arranged in a third rear region and a fourth rear region of the display unit parallel to a second direction intersecting the first direction, respectively, supporting the first arc member and the second arc member, fixed brackets arranged in the third rear region and the fourth rear region of the display unit, respectively, for movably supporting tips of the first arc member and the second arc member, and a drive unit arranged in a rear central region of the display unit for simultaneously rotating the centers of the first arc member and the second arc member.

[0372] According to certain examples herein, the first arc member and the second arc member each have a curvilinear configuration and can be rotated in opposite directions by being driven by a drive portion.

[0373] According to some examples herein, each of the first arc member and the second arc member can have a curved form, with the center of each of the first arc member and the second arc member adjacent to a central portion of the rear of the display unit, and the tip of each of the first arc member and the second arc member adjacent to a corner portion of the display unit.

[0374] According to some examples in the present specification, the drive unit may include a first holder that rotatably supports a center portion of the first arc member, a second holder that rotatably supports a center portion of the second arc member, a first fixed link fixed to the center portion of the first arc member, a second fixed link fixed to the center portion of the second arc member, at least one rotary motor, a first rack gear for rotating the first fixed link, a second rack gear for rotating the second fixed link, a pinion gear connected between the first rack gear and the first rack gear, and a rotation transmission unit that rotates the pinion gear by rotation of the at least one rotary motor.

[0375] According to some examples in the present specification, the curvature variable unit may include a first arc member and a second arc member arranged in a first rear region and a second rear region of the display unit parallel to a first direction, respectively, guides arranged in a third rear region and a fourth rear region of the display unit parallel to a second direction intersecting the first direction, respectively, supporting the first arc member and the second arc member, fixed brackets arranged in the third rear end portion and the fourth rear end portion of the display unit, respectively, joint members rotatably arranged on the fixed brackets and inserted into the tips of the first arc member and the second arc member, and a drive unit arranged in the rear intermediate portion of the display unit and rotating the centers of the first arc member and the second arc member simultaneously.

[0376] According to some examples herein, the first arc member and the second arc member each have a curved shape and can rotate in the same direction relative to each other while moving in the same direction when driven by the drive unit.

[0377] According to some examples in the present specification, the drive unit may include a guide plate arranged on the rear surface of the display unit and having a guide rail, a first holder link arranged on one side of the guide plate and rotatably supporting a center portion of the first arc member, a second holder link arranged on the other side of the guide plate and rotatably supporting a center portion of the second arc member, a sliding block connected between the first holder link and the second holder link and having one or a pair of rack gears slidably arranged on the guide rail, one or a pair of pinion gears that slide the one or a pair of rack gears, one or a pair of rotation motors, and a rotation transmission unit that rotates the one or a pair of pinion gears by rotation of the one or a pair of rotation motors.

[0378] According to some examples in the present specification, the curvature variable unit includes a first arc member and a second arc member arranged in a first rear region and a second rear region of the display unit parallel to a first direction, respectively, guides arranged in a third rear region and a fourth rear region of the display unit parallel to a second direction intersecting the first direction and supporting the first arc member and the second arc member, respectively, fixed brackets arranged in the third rear region and the fourth rear region of the display unit, respectively, for movably supporting tips of the first arc member and the second arc member, and a drive unit arranged in a rear central region of the display unit for simultaneously rotating central portions of the first arc member and the second arc member, and the fixed brackets can be arranged at an angle with respect to the second direction.

[0379] According to certain examples herein, the first arc member and the second arc member each have a curvilinear configuration and can be rotated in opposite directions by being driven by a drive portion.

[0380] According to some examples in the present specification, the drive unit may include a first holder that rotatably supports a center portion of the first arc member, a second holder that rotatably supports a center portion of the second arc member, a first fixed link fixed to the center portion of the first arc member, a second fixed link fixed to the center portion of the second arc member, at least one rotary motor, a first rack gear for rotating the first fixed link, a second rack gear for rotating the second fixed link, a pinion gear connected between the first rack gear and the first rack gear, and a rotation transmission unit that rotates the pinion gear by rotation of the at least one rotary motor.

[0381] A display device according to some examples of the present specification includes a display unit including a display panel for displaying an image, and a curvature variable unit disposed on a rear surface of the display unit and capable of varying a curvature of the display unit, the curvature variable unit including a first arc member and a second arc member having a curved shape disposed in a first rear region and a second rear region of the display unit, respectively, parallel to a first direction, a driving unit disposed in a rear intermediate portion of the display unit and configured to simultaneously rotate centers of the first arc member and the second arc member, a guide disposed on the rear surface of the display unit so as to be parallel to a second direction intersecting with the first direction, and configured to movably support an intermediate portion between a center and both ends of the first arc member and the second arc member, the guide being disposed on the rear surface of the display unit so as to be parallel to a second direction intersecting with the first direction, and a fixing bracket disposed on a third rear end portion and a fourth rear end portion of the display unit parallel to the second direction intersecting with the first direction, the fixing bracket being capable of transmitting a pressure force applied by a tip of each of the first arc member and the second arc member rotating along with the driving of the driving unit to each of the third rear end portion and the fourth rear end portion of the display unit.

[0382] According to certain examples herein, the fixed bracket can movably support a distal end of each of the first and second arc members.

[0383] According to some examples herein, the stationary bracket can be disposed at an angle relative to the second direction.

[0384] According to some examples herein, the curvature variable unit may further include a joint member rotatably arranged on the fixed bracket, and the joint member may include a pin portion inserted into each of the tips of the first arc member and the second arc member, and a ring portion connected to the tip of the pin portion and rotatably arranged on the fixed bracket.

[0385] A display device according to some examples of the present specification may further include a vibration unit disposed on a rear surface of the display unit and configured to vibrate the display panel such that sound is output by vibration of the display panel.

[0386] According to some examples herein, the display unit may include a back cover disposed behind the display panel and supporting a vibration unit, the vibration unit may be coupled to the back cover and include a pair of sound generating units that vibrate the display panel, and the back cover may include an overlapping slit between the pair of sound generating units.

[0387] A display device according to some examples herein may further include a rear curtain unit disposed on the rear side of the display unit so as to cover the variable curvature unit.

[0388] According to some examples herein, the rear curtain unit may include a curtain edge frame connected to a rear edge portion of the display unit and having a first opening, a curtain back frame coupled to the curtain edge frame and having a second opening overlapping the first opening, and a plurality of curtain members arranged to be spaced apart from each other in the second opening of the curtain back frame.

[0389] According to certain examples herein, each of the plurality of curtain members may include a fiber material or a fabric material.

[0390] The features, structures, effects, etc. described in the examples of the present specification are included in at least one example of the present specification, and are not necessarily limited to only one example. Furthermore, the features, structures, effects, etc. exemplified in at least one example of the present specification can be combined or modified in other examples by a person having ordinary knowledge in the field to which the present specification belongs. Therefore, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present specification.

[0391] The present specification described above is not limited to the above-mentioned embodiments and the attached drawings, and it will be apparent to those skilled in the art to which the present specification pertains that multiple substitutions, modifications and changes are possible within the scope of the technical matters of the present specification. Therefore, the scope of the present specification is indicated by the claims set forth below, and all modifications or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present specification. [Explanation of symbols]

[0392] 100 display units 110 Display Panel 120 Back Cover 200 Curvature variable unit 210 Arc components 220, 270 Drive unit 230 Guide 240, 260 Fixing bracket 250 Joint material 300 Stand 400 Rear curtain unit 500 vibration units 510 First vibration unit 511 First Acoustic Generator Unit 513 Second Acoustic Generator Unit 530 Second vibration unit 600 Cushioning material 700 Positioning Unit 720 Display Lift Unit 730 Display Tilt Unit

Claims

1. A display unit having a curvature, the display unit including a display panel configured to display an image and a back cover provided on a rear surface of the display panel; a vibration unit having a curvature corresponding to a curvature of the display unit and configured to vibrate the display panel to output sound; Including, the back cover has a space between itself and a rear surface of the display panel, is configured to hold the vibration unit, and includes a slit overlapping with the vibration unit; The display panel comprises: a sealing member provided on a pixel array layer including a plurality of pixels; A display device including a touch sensor layer provided on the sealing member.

2. A display unit having a curvature, the display unit including a display panel configured to display an image and a back cover provided on a rear surface of the display panel; a vibration unit having a curvature corresponding to a curvature of the display unit and configured to vibrate the display panel to output sound; The vibration unit includes a first vibration unit arranged in a first region of the display unit and a second vibration unit arranged in a second region of the display unit, the back cover has a space between itself and a rear surface of the display panel, is configured to hold the first vibration unit and the second vibration unit, and includes a slit disposed between the first vibration unit and the second vibration unit; The display panel comprises: a sealing member provided on a pixel array layer including a plurality of pixels; A display device including a touch sensor layer provided on the sealing member.

3. The display unit has a curved shape having the curvature, and 3. The display device of claim 1 or 2, wherein the vibrating unit is aligned with the curvilinear form of the display unit.

4. 3. The display device of claim 1 or 2, wherein the display unit is configured to vary the curvature of the display unit.

5. The display unit has a planar shape with the curvature being zero, and The display device of claim 4 , wherein the vibrating unit is aligned with the planar form of the display unit.

6. The display device according to claim 1 or 2, wherein the slit is configured to penetrate the back cover vertically in a thickness direction of the display unit.

7. The display device according to claim 1 , wherein the slit is configured to allow an air gap between the display panel and the back cover to communicate with an outside of the back cover.

8. The vibration unit includes a pair of sound generating units coupled to the back cover, The display device according to claim 1 , wherein the slit overlaps a region between the pair of sound-generating units.

9. The display device according to claim 1 or 2, further comprising a curvature changing unit arranged on a rear surface of the display unit and configured to change a curvature of the display unit.

10. The curvature variable unit is an arc member disposed on a rear surface of the display unit; A drive unit is disposed at the center of the rear surface of the display unit and rotates the center of the arc member; a first guide member disposed on a rear surface of the display unit and supporting the arc member between a center portion and one end thereof; 10. The display device according to claim 9, further comprising a second guide member arranged on a rear surface of the display unit and supporting the arc member between a center portion and the other end thereof.

11. The curvature variable unit is a first arc member and a second arc member disposed on a first rear region and a second rear region of the display unit, respectively, parallel to a first direction; a guide disposed in each of a third rear region and a fourth rear region of the display unit parallel to a second direction intersecting the first direction, the guide supporting the first arc member and the second arc member, respectively; a fixing bracket disposed in each of a third rear region and a fourth rear region of the display unit, the fixing bracket movably supporting a tip of each of the first arc member and the second arc member; The display device according to claim 9 , further comprising a drive section arranged in a rear central area of ​​the display unit and configured to simultaneously rotate central portions of the first arc member and the second arc member.

12. The display device of claim 11 , wherein the first arc member and the second arc member each have a curved shape and are configured to rotate in opposite directions to each other when driven by the driver.

13. each of the first arc member and the second arc member having a curvilinear configuration; 12. The display device of claim 11, wherein a center portion of each of the first arc member and the second arc member is adjacent to a center portion of a rear surface of the display unit, and a tip portion of each of the first arc member and the second arc member is adjacent to a corner portion of the display unit.

14. The drive unit is a first holder that rotatably supports a center portion of the first arc member; a second holder that rotatably supports a center portion of the second arc member; a first fixed link fixed to a center portion of the first arc member; a second fixed link fixed to a center portion of the second arc member; At least one rotary motor; a first rack gear for rotating the first fixed link; a second rack gear for rotating the second fixed link; a pinion gear connected between the first rack gear and the second rack gear; The display device according to claim 11 , further comprising a rotation transmission unit that rotates the pinion gear based on rotation of the at least one rotary motor.

15. The curvature variable unit is a first arc member and a second arc member disposed on a first rear region and a second rear region of the display unit, respectively, parallel to a first direction; a guide disposed in each of a third rear region and a fourth rear region of the display unit parallel to a second direction intersecting the first direction, the guide supporting the first arc member and the second arc member, respectively; a fixing bracket disposed at each of a third rear end portion and a fourth rear end portion of the display unit; a joint member rotatably disposed on the fixed bracket and inserted into a tip of each of the first arc member and the second arc member; The display device according to claim 9 , further comprising a drive section arranged in a rear central portion of the display unit and configured to simultaneously rotate central portions of the first arc member and the second arc member.

16. The display device of claim 15, wherein the first arc member and the second arc member each have a curved shape and are configured to move in the same direction and rotate in the same direction when driven by the driving unit.

17. The drive unit is a guide plate disposed on a rear surface of the display unit and having a guide rail; a first holder link disposed on one side of the guide plate and rotatably supporting a center portion of the first arc member; a second holder link disposed on the other side of the guide plate and rotatably supporting a center portion of the second arc member; a sliding block connected between the first holder link and the second holder link and having one or a pair of rack gears slidably disposed on the guide rail; one or a pair of pinion gears that slide the one or a pair of rack gears; one or a pair of rotary motors; The display device according to claim 15, further comprising a rotation transmission unit that rotates the one or pair of pinion gears based on rotation of the one or pair of rotary motors.

18. The curvature variable unit is a first arc member and a second arc member disposed on a first rear region and a second rear region of the display unit, respectively, parallel to a first direction; a guide disposed in each of a third rear region and a fourth rear region of the display unit parallel to a second direction intersecting the first direction, the guide supporting the first arc member and the second arc member, respectively; a fixing bracket disposed in a third rear region and a fourth rear region of the display unit, the fixing bracket movably supporting a tip of each of the first arc member and the second arc member; a driving unit disposed in a rear intermediate region of the display unit and configured to simultaneously rotate a central portion of each of the first arc member and the second arc member; The display device according to claim 9 , wherein the fixing bracket is disposed at an angle with respect to the second direction.

19. The display device of claim 18, wherein the first arc member and the second arc member each have a curved shape and are rotated in opposite directions when driven by the driver.

20. The drive unit is a first holder that rotatably supports a center portion of the first arc member; a second holder that rotatably supports a center portion of the second arc member; a first fixed link fixed to a center portion of the first arc member; a second fixed link fixed to a center portion of the second arc member; At least one rotary motor; a first rack gear for rotating the first fixed link; a second rack gear for rotating the second fixed link; a pinion gear connected between the first rack gear and the second rack gear; The display device according to claim 18 , further comprising a rotation transmission unit that rotates the pinion gear based on rotation of the at least one rotary motor.

Images