Display device

Abstract

A display device includes a display portion including a display panel for displaying an image, a roller portion configured to wind or unwind the display portion, and a belt spring configured to move the display portion in an upward and / or downward direction in cooperation with an operation of the roller portion, and the roller portion includes a motor, a belt spring cylinder configured to accommodate the motor and connected to the motor, the belt spring cylinder being configured such that one end of the belt spring is fixed to the belt spring cylinder and the belt spring cylinder winds or unwinds the belt spring, a belt spring housing configured to accommodate the belt spring cylinder and the belt spring, and a plurality of roller cylinders connected to two opposite sides of the motor.

Description

Technical Field

[0001] This disclosure relates to display devices, and more particularly to rollable display devices capable of displaying images in a roll-up configuration of the display device. Background Technology

[0002] Display devices are known to be used as monitors for computers, televisions, mobile phones, etc., and include organic light-emitting displays (OLEDs) configured to emit their own light and liquid crystal displays (LCDs) with individual light sources.

[0003] The applications of display devices have diversified from the examples above to personal mobile devices, and research is underway on display devices with a wide display area while reducing size and weight.

[0004] In addition, recently, rollable displays have attracted attention as the next generation of display devices. Summary of the Invention

[0005] In one embodiment, the rollable display device includes a display section, lines, etc., on a substrate made of a flexible plastic material, and thus can display images even when the rollable display device is rolled up.

[0006] In one or more embodiments of this disclosure, the display device is configured to improve space utilization by minimizing and / or reducing the volume of the roller portion.

[0007] In one or more embodiments of this disclosure, the display device is configured to overcome challenges associated with changes in display position when the display portion is rolled up or unfolded.

[0008] In one or more embodiments of this disclosure, the display device is configured to minimize and / or reduce the space available for winding and unfolding operations.

[0009] The embodiments disclosed herein are not limited to the embodiments described above, and those skilled in the art will clearly understand from the following description other embodiments not mentioned above.

[0010] According to an embodiment of the present disclosure, a display device includes: a display including a display panel configured to display an image; a roller configured to wind or unwind the display; and a belt spring configured to move the display in an upward / downward direction in coordination with the operation of the roller, the roller including: a motor; a belt spring sleeve configured to house and be connected to the motor, the belt spring sleeve being configured such that one end of a belt spring is fixed to the belt spring sleeve, and the belt spring sleeve winds or unwinds the belt spring; a belt spring housing configured to house the belt spring sleeve and the belt spring; and a plurality of rollers connected to two opposite sides of the motor.

[0011] Further details of the example implementation are included in the specific implementation with reference to the accompanying drawings.

[0012] According to this disclosure, the motors for the rollers that wind or unwind the display and the operating rollers are located in the same space. Therefore, the space required to operate the display device can be minimized and / or reduced.

[0013] According to this disclosure, slippage of the winding / unwinding rollers and slippage of the display section caused by the difference in rotational speed between the winding / unwinding rollers and the display section of the display device can be reduced.

[0014] The benefits and advantages of this disclosure are not limited to the foregoing, and additional benefits and advantages are included in the following description. Attached Figure Description

[0015] The above and other aspects, features and other advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0016] Figure 1A This is a perspective view of a display device having a display extending from a housing according to an embodiment of the present disclosure;

[0017] Figure 1B It has a display housed in a casing. Figure 1A A perspective view of the display device;

[0018] Figure 2 yes Figure 1A The front view of the display device's monitor;

[0019] Figure 3 yes Figure 1A Rear view of the display of the display device;

[0020] Figure 4A It is separate from the shell. Figure 1A A front-view stereoscopic view of the display device's monitor;

[0021] Figure 4B yes Figure 4A A rear-view perspective view of the display of the display device;

[0022] Figure 5 yes Figure 1A An exploded perspective view of the display of a display device;

[0023] Figure 6A This is an example Figure 1A Exploded perspective view of the motor, belt spring cylinder, belt spring housing, and belt spring guide of the display device roller;

[0024] Figure 6B yes Figure 6A A perspective view of the assembly state of the roller motor, belt spring cylinder, belt spring housing, and belt spring guide of the display device;

[0025] Figure 7A This is an example Figure 1A An exploded perspective view of the substrate and roller of the display device.

[0026] Figure 7B This is an example Figure 7A A perspective view of the assembly state of the substrate and roller of the display device;

[0027] Figure 8A This is an example set in Figure 1A A three-dimensional view of the helical spring in the roller of the display device;

[0028] Figure 8B yes Figure 1A A perspective view of the rollers of the display device;

[0029] Figures 9A to 9C This is an example Figure 1A A cross-sectional view of the operation of the helical spring during the winding or unfolding operation of the rollers of the display device;

[0030] Figure 10A and Figure 10B This is an example Figure 1A A cross-sectional view of the winding and unfolding operations of the rollers of the display device;

[0031] Figure 11A This is a perspective view of the rollers of a display device according to an embodiment of the present disclosure; and

[0032] Figure 11B yes Figure 11A A cross-sectional view of the rollers of the display device. Detailed Implementation

[0033] The advantages and features of this disclosure, as well as the methods for achieving these advantages and features, will become clear from the following detailed description of exemplary embodiments and the accompanying drawings. However, this disclosure is not limited to the exemplary embodiments disclosed herein, but will be implemented in various forms. Exemplary embodiments are provided by way of example only so that those skilled in the art can fully understand the disclosure and scope of this disclosure.

[0034] The shapes, dimensions, ratios, angles, quantities, etc., illustrated in the accompanying drawings to describe exemplary embodiments of this disclosure are merely examples, and this disclosure is not limited thereto. Throughout the specification, the same reference numerals generally denote the same elements. Furthermore, in the following description of this disclosure, detailed explanations of known prior art may be omitted to avoid unnecessarily obscuring the subject matter of this disclosure. Terms such as “comprising,” “having,” and “consisting of” as used herein are generally intended to allow for the addition of other components, unless these terms are used in conjunction with the term “only.” Unless otherwise expressly stated, any reference to the singular may include the plural.

[0035] Even if not explicitly stated, components are interpreted as including a normal error range.

[0036] When using terms such as “above,” “over,” “below,” and “nearby” to describe the positional relationship between two parts, one or more parts may be positioned between the two parts unless these terms are used in conjunction with the terms “closely” or “directly.”

[0037] When a component or layer is disposed "on" another component or layer, the component or layer may be disposed directly on the other component or layer, or other layers or components may be inserted between the component or layer and the other component or layer.

[0038] Although terms such as "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from others. Therefore, the first component mentioned below can be the second component in the technical concept of this disclosure.

[0039] For ease of description, the dimensions and thickness of each component shown in the accompanying drawings may be illustrated, and this disclosure is not necessarily limited to the dimensions and thickness of the illustrated components.

[0040] Features of the various embodiments of this disclosure may be partially or completely attached to or combined with each other, and may be interlocked and operated in various technical ways, and the embodiments may be performed independently of each other or in relation to each other.

[0041] In the following, a stretchable display device according to an exemplary embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.

[0042] Rollable display device

[0043] A rollable display device is a display device that can display images even when rolled up. Rollable display devices can have greater flexibility than conventional display devices in the prior art. The shape and configuration of a rollable display device can be freely changed depending on whether it is in use. Specifically, when the rollable display device is not in use, it can be rolled up and stored in a reduced volume. Conversely, when the rollable display device is in use, the rolled-up device can be unfolded and reused.

[0044] Figure 1A and Figure 1B This is a perspective view of a display device 100 according to an embodiment of the present disclosure.

[0045] First, refer to Figure 1A and Figure 1B The display device 100 includes a display unit DP (which may also be referred to herein as a display DP or display component DP) and a housing unit HP (which may also be referred to herein as a housing HP or housing component HP).

[0046] The display unit DP is configured to display an image to a user. For example, display elements and circuitry, wiring, and components for operating the display elements can be provided on the display unit DP. In this case, since the display device 100 according to an embodiment of the present disclosure is a rollable display device 100, the display unit DP can be configured to be rolled up or unfolded. For example, the display unit DP may include a display panel that is flexible for rolling up or unfolding, and a plurality of rear bars. Reference will be made below. Figures 2 to 4B A more detailed description of the display unit (DP).

[0047] The housing (HP) is the outer casing that houses the display unit (DP). For example... Figure 1B Ideally, the display unit DP can be wound and housed within the housing unit HP. For example... Figure 1A As shown in the ideal configuration, the display unit DP can be unfolded and mounted outside the housing unit HP. The movement of the display unit DP in and out of the housing unit HP is typically controlled by... Figure 1A Arrow A in the diagram represents...

[0048] The housing part HP has an opening HPO through which the display part DP can be moved into and out of the housing part HP. The display part DP can move in an upward / downward direction while passing through the opening HPO of the housing part HP.

[0049] Furthermore, the display unit DP of the display device 100 can switch from a fully unfolded state to a fully rolled-up state, or vice versa. In one embodiment, the display unit DP may also be positioned between the fully unfolded and fully rolled-up states.

[0050] Figure 1A An example is shown of the display unit DP of the display device 100 in its fully extended state. The fully extended state is the state in which the display unit DP of the display device 100 is completely disposed outside the housing portion HP. That is, the fully extended state can be defined as the state in which the display unit DP is extended to the maximum extent and disposed outside the housing portion HP to the maximum extent (where the display unit DP cannot be extended further) so as to allow the user to see the image on the display device 100.

[0051] Figure 1B An example is shown of the display section DP of the display device 100 in a fully rolled-up state. The fully rolled-up state is a state in which the display section DP of the display device 100 is housed within the housing section HP and cannot be further rolled up. When the user is not viewing an image on the display device 100, the arrangement of the display section DP within the housing section HP is aesthetically advantageous. Therefore, the fully rolled-up state can be defined as a state in which the display section DP is rolled up and completely housed within the housing section HP. Furthermore, in the fully rolled-up state, the size of the display device 100 is reduced, and the display device 100 can be stored and transported more easily.

[0052] Display section

[0053] Figure 2 This is the front view of the display section DP of the display device 100. Figure 3 This is a rear view of the display unit DP of the display device 100. (Refer to...) Figure 2 and Figure 3 The display unit DP of the display device 100 includes a plurality of rear bars 110, a display panel 120, a flexible film 130 (which may include one or more flexible films 130) and a printed circuit board 140.

[0054] Display panel 120 is a panel configured to display images to a user. Display panel 120 may include display elements configured to display images, driving elements configured to operate the display elements, and lines configured to transmit various types of signals to the display elements and the driving elements.

[0055] Depending on the type of display panel 120, it may include different display elements. For example, if the display panel 120 is an organic light-emitting display panel, the display element may be an organic light-emitting element comprising an anode, an organic light-emitting layer, and a cathode. For example, if the display panel 120 is a liquid crystal display panel, the display element may be a liquid crystal display element. Additionally, if the display panel 120 is a light-emitting display panel including LEDs, the display element may be an LED. In the following, it is assumed that the display panel 120 is an organic light-emitting display panel. However, the display panel 120 is not limited to organic light-emitting display panels. Furthermore, since the display device 100 is a rollable display device, the display panel 120 may be implemented as a flexible display panel so that it can be rolled around or unfolded from the rollers, as further described below.

[0056] Reference Figure 2 The display panel 120 includes a display area AA and a non-display area NA.

[0057] The display area AA is the area of ​​the display panel 120 in which an image is displayed. The display area AA may include multiple pixels, multiple sub-pixels constituting the multiple pixels, and driving circuitry configured to operate the multiple sub-pixels. The multiple sub-pixels may be the smallest unit constituting the display area AA. Display elements may be disposed in each of the multiple sub-pixels. For example, each of the multiple sub-pixels may include a light-emitting element, such as an anode, a light-emitting portion, and a cathode. However, this disclosure is not limited thereto. In addition, the circuitry (or multiple circuitry) configured to operate the multiple sub-pixels may include driving elements, lines, etc. For example, the circuitry (or multiple circuitry) may include, but is not limited to, thin-film transistors, storage capacitors, gate lines, data lines, etc.

[0058] The non-display area NA is the area in which no image is displayed. The non-display area NA surrounds, but is not limited to, the outer perimeter of the display area AA. Various lines and circuits for operating the organic light-emitting elements (or some other type of display element) in the display area AA are disposed in the non-display area NA. For example, the non-display area NA may include, but is not limited to, link lines for transmitting signals to multiple sub-pixels and circuits in the display area AA. The non-display area NA may include driver ICs, such as gating driver ICs and data driver ICs.

[0059] The flexible film 130 is a film having various types of components disposed on a flexible base film (i.e., a flexible base film). The flexible film 130 may be stretchable. A localized area of ​​the flexible film 130, along with the stretchable area MA, may be wound around or unwound from a roller. The flexible film 130 may provide signals to multiple sub-pixels and circuits in the display area AA. The flexible film 130 may be electrically connected to the display panel 120. In a non-limiting example, the flexible film 130 is disposed at one end of the non-display area NA of the display panel 120, such as at the bottom end of the non-display area NA of the display panel 120, and provides power supply voltage, data voltage, etc., to multiple sub-pixels and circuits in the display area AA. Figure 2 The number of flexible membranes 130 shown is an example, and the number of flexible membranes 130 can be changed and selected according to the design. However, this disclosure is not limited thereto.

[0060] Furthermore, driver ICs, such as gating driver ICs and data driver ICs, may also be disposed on the flexible film 130. Driver ICs are components configured to process data for displaying images and to process drive signals for processing that data. Driver ICs can be disposed in ways such as chip-on-glass (COG), chip-on-film (COF), and tape-on-package (TCP) methods, depending on how they are mounted. However, for ease of description, this disclosure will be presented as a non-limiting example in which the driver IC is mounted on the flexible film 130 via a chip-on-film method. However, this disclosure is not limited thereto.

[0061] In a non-limiting example, the printed circuit board 140 is disposed at one end of the flexible film 130, such as at the bottom end of the flexible film 130, and is connected to the flexible film 130. The printed circuit board 140 is a component for providing signals to the driver IC. The printed circuit board 140 provides the driver IC with various signals such as drive signals and data signals. Various types of components can be disposed on the printed circuit board 140. For example, a timing controller, a power supply unit (which may also be referred to as a power supply), etc., can be disposed on the printed circuit board 140. Figure 2 A printed circuit board 140 is illustrated. However, the number of printed circuit boards 140 can be varied and selected according to the design. This disclosure is not limited thereto.

[0062] Furthermore, despite Figure 2Not shown in the diagram, but additional printed circuit boards connected to printed circuit board 140 can be further provided. For example, printed circuit board 140 can be referred to as a source printed circuit board (“source PCB” or “S-PCB”) on which a data driver unit is mounted. The additional printed circuit board connected to printed circuit board 140 can be referred to as a control printed circuit board (“control PCB” or “C-PCB”) on which a timing controller or the like is mounted. The additional printed circuit board can be provided in the roller section. The additional printed circuit board can be provided outside the roller section and inside the housing section HP.

[0063] Reference Figure 3 Multiple rear bars 110 may be disposed on the rear surface of the display panel 120. The multiple rear bars 110 may support the display panel 120. When the display panel 120 is wound around or unwound from the roller, the rear bars 110 may support the display panel 120 and prevent it from being scratched or damaged. In other words, the rear bars 110 may provide support or reinforcement for the display panel 120. The multiple rear bars 110 may be referred to as aprons. The multiple rear bars 110 may be made of plastic material. However, this disclosure is not limited thereto. Furthermore, in addition to other fasteners and fastening techniques, the multiple rear bars 110 may be attached by separate bonding layers or foam strips.

[0064] Figure 2 and Figure 3 A plurality of rear levers 110 are illustrated and disposed on the rear surface of the display panel 120. In some embodiments, a rear cover having a plurality of openings may be additionally disposed between the display panel 120 and the plurality of rear levers 110. Alternatively, in some embodiments, only the rear cover may be used without the plurality of rear levers 110.

[0065] The connection structure between the display section, the roller section, and the belt spring.

[0066] Figure 4A This is a front perspective view of the display device 100 detached from or separated from the housing HP. Figure 4B This is a rear perspective view of the display device 100 detached from or separated from the housing HP. Figure 4A and Figure 4B Additional details are provided regarding the connection structure between the display section DP, the roller section 150 (also referred to herein as roller 150), and the belt spring 161 of a display device 100 according to one or more embodiments of the present disclosure.

[0067] Reference Figure 4A and Figure 4B The display device 100 according to an embodiment of the present disclosure includes a belt spring 161 and a head rod 162.

[0068] Reference Figure 4A and Figure 4B The display unit DP is connected to the roller 150, and the roller 150 is configured to wind or unwind the display unit DP. A belt spring 161 can move the display unit DP in an upward and / or downward direction in coordination with the operation of the roller 150. (Refer to...) Figure 10A and Figure 10B The specific method of operating the roller section 150 is described, but this disclosure is not limited thereto.

[0069] A belt spring 161 is provided on the rear surface 102 of the display unit DP. The upper end 161U of the belt spring 161 is fixed to the upper end 120U of the display panel 120. The lower end 161L of the belt spring 161 is fixed to the roller portion 150. Therefore, the belt spring 161 can be wound around or unwound from the roller portion 150 together with the display unit DP and the display panel 120, and can move the display unit DP in the upward and / or downward direction in coordination with the operation of the roller portion 150.

[0070] Among other possibilities, the belt spring 161 can be a bistable wound composite (“BRC”) component. The belt spring 161 can be wound or unwound along the column direction (i.e., the longitudinal or vertical direction of the belt spring 161) while simultaneously wound or unwound along the row direction (i.e., the width or horizontal direction of the belt spring 161). When the belt spring 161 remains unwound (flat) along the row direction, it is wound along the column direction. Conversely, when the belt spring 161 remains wound along the row direction, it is rigid along the column direction and thus unwound along the longitudinal direction. In embodiments, the belt spring 161 is prestressed and / or has elastic properties such that the shape of the belt spring 161 changes as it is wound or unwound from the roller 150. More specifically, when the belt spring 161 is wound around the roller 150, it is wound along the row direction (i.e., in the width or horizontal direction of the belt spring 161). Figure 4A and Figure 4B The direction of the belt spring 161 (from left to right) flattens out, thus uniformly winding around the roller 150 in a flat configuration. As the belt spring 161 unfolds from the roller 150, it tends to coil into a rigid tubular structure, as shown at the upper end 161U of the belt spring 161. In this unfolded configuration, the tubular structure of the belt spring 161 provides rigidity and support to the display unit DP, and in some cases, helps to maintain the display unit DP in a flat configuration so that the image on the display panel 120 of the display unit DP can be viewed without deformation.

[0071] In this case, the stiffness of the belt spring 161 in the column direction is related to the degree to which the belt spring 161 is wound in the row direction. That is, the degree to which the belt spring 161 is wound in the row direction can be appropriately selected according to the stiffness of the display unit DP in the column direction.

[0072] In the display device 100 according to an embodiment of the present disclosure, the belt spring 161 is unfolded or rolled up in the row direction, so that the belt spring 161 can be wound or unfolded in the column direction. Specifically, when the roller 150 performs a winding operation, the belt spring 161 can be wound together with the display panel 120 around the roller 150 in the column direction. When the roller 150 performs an unfolding operation, the belt spring 161 can be unfolded together with the display panel 120 from the roller 150 in the column direction (i.e., Figure 2 and Figure 3 (The column and row directions are shown).

[0073] Furthermore, when the roller section 150 performs the unfolding operation, the belt spring 161, which unfolds along the column direction, can be rigid along the column direction, thereby limiting the swinging and twisting of the unfolded display panel 120. Therefore, without any other external force, the unfolded display panel 120 can be kept flat by the rigidity of the belt spring 161.

[0074] The head lever 162 can be disposed at the uppermost end of the display unit DP. The head lever 162 is configured to fix the upper end 161U of the display unit DP and the belt spring 161. In some embodiments, the head lever 162 may only cover the portion of the surface of the display unit DP adjacent to the uppermost edge of the display unit DP, so as not to cover the image displayed on the front surface of the display unit DP. For example, the display unit DP and the head lever 162 may be fixed by screws or other fasteners, but this disclosure is not limited thereto.

[0075] As in Figure 4A As shown and described in more detail elsewhere, the flexible film 130 and the printed circuit board are also configured to be wound and unwound around the roller portion 150.

[0076] In the following text, reference will be made to Figures 5 to 8B Describe the specific structure of roller section 150.

[0077] Roller section structure

[0078] Figure 5 This is an exploded perspective view of a display device 100 without a housing portion HP in one or more embodiments. Figure 6A This is an exploded perspective view illustrating the motor, belt spring cylinder, belt spring housing, and belt spring guide of the roller portion 150 of a display device 100 according to one or more embodiments of the present disclosure. Figure 6B This is a perspective view of the assembly state of the motor, belt spring cylinder, belt spring housing, and belt spring guide of the roller portion 150 of the display device 100 according to at least some embodiments of the present disclosure. Figure 7A This is an exploded perspective view illustrating the substrate and roller of the roller portion 150 of a display device 100 according to one or more embodiments of the present disclosure. Figure 7BThis is a perspective view illustrating the assembled state of the substrate and roller of the roller portion 150 of a display device 100 according to some embodiments of the present disclosure. Figure 8A This is a perspective view illustrating a helical spring disposed in a roller section 150 of a display device 100 according to one or more embodiments of the present disclosure. Figure 8B This is a perspective view of the roller portion 150 of a display device 100 according to one or more embodiments of the present disclosure.

[0079] As will refer to Figures 5 to 8B In more detail, the roller section 150 may include a motor 151, a belt spring cylinder 152, a belt spring housing 153, a plurality of rollers 154, a base plate 155, and a belt spring guide 156.

[0080] from Figures 5 to 6B Initially, the motor 151 may be located at the central portion of the roller 150, which is the innermost part of the roller 150. In other words, the motor 151 may be the inner center of the roller 150, with other features of the roller 150 arranged around and to the outside of the motor 151. The motor 151 can rotate the roller 150 clockwise or counterclockwise. In this embodiment, the motor 151 is an electric motor operable to provide rotational force to rotate the roller 150. Therefore, the motor 151 may be connected to a separate external power source or a power source integrated with the display device 100 (such as an embedded battery) to supply power to the motor 151.

[0081] Reference Figure 5 and Figure 6A The belt spring sleeve 152 may have a generally cylindrical shape. The belt spring sleeve 152 is connected to the motor 151, and also accommodates the motor 151 within the axial bore 152A of the belt spring sleeve 152. Specifically, as... Figure 6AAs shown, the belt spring sleeve 152 can be connected to the motor 151 via a motor retainer 151F disposed on one side surface 152F (i.e., the first side surface 152F) of the belt spring sleeve 152 and configured to cover the motor 151. The motor retainer 151F can be configured to secure the motor 151 to the belt spring sleeve 152. Therefore, the belt spring sleeve 152 can be rotated clockwise or counterclockwise by operation of the motor 151. In an embodiment, the motor retainer 151F is provided with a form factor of a circular plate having a hole 151H for receiving a fastener 151R to connect the belt spring sleeve 152 to the motor 151. The plate may have dimensions and arrangements that overlap with both a portion of the motor 151 and a portion of the belt spring sleeve 152 to facilitate connection. Furthermore, the hole 151H may be arranged around the central hole 151C passing through the motor fixture 151F, which accommodates the driver 151D of the motor 151 (i.e., the driver 151D passes through the central hole 151C) and allows the driver 151D to engage with other components of the roller 150, as further described elsewhere.

[0082] One end of the belt spring 161 (e.g.) Figure 5 The lower end 161L shown is fixed to the belt spring cylinder 152. When the belt spring cylinder 152 is rotated clockwise or counterclockwise by the motor 151, the belt spring 161 can be wound around or unwound from the belt spring cylinder 152 via the connection between the lower end 161L of the belt spring 161 and the belt spring cylinder 152. That is, the belt spring cylinder 152 can be configured to cause the belt spring 161 to be wound or unwound.

[0083] Furthermore, a belt spring sleeve extension 152E with an outwardly extending shape can be provided on the other side surface 152S of the belt spring sleeve 152 (i.e., the second side surface 152S opposite to the first side surface 152F). That is, as Figure 6A and Figure 6B As shown, the belt spring extension 152E can be configured to protrude outward from the other side surface 152S of the belt spring 152. In embodiments, the belt spring 152 and the belt spring extension 152E have different diameters to be in a stepped descending or stepped ascending configuration. In a non-limiting example, and as... Figure 5 As shown, the belt spring sleeve 152 may have a diameter larger than the diameter of the belt spring sleeve extension 152E. Furthermore, a helical spring 170 may be provided on the belt spring sleeve extension 152E. Figure 5 Therefore, when the helical spring is wound or unwound, the helical spring 170 can maintain the display DP in a flat state while applying tension to the display DP. In this case, it will be referred to below. Figures 8A to 9CDescribe the specific construction of the helical spring 170.

[0084] The strip spring housing 153 can be configured to accommodate the strip spring sleeve 152 and the strip spring 161. Specifically, the strip spring housing 153 can be configured to surround the outer peripheral surface 152O of the strip spring sleeve 152. Furthermore, the strip spring housing 153 can have a shape that allows the strip spring 161 to be wound around or unwound from the strip spring sleeve 152. For example, as... Figure 5 and Figure 6A As shown, the belt spring housing 153 may have a cylindrical shape with a C-shaped cross-section to provide a cylindrical outer surface for winding the belt spring 161, and also provide a hole 153A through which the belt spring 161 can pass to attach to the belt spring sleeve 152 housed in the belt spring housing 153. The belt spring housing 153 may also have a different shape that is at least partially open, allowing the belt spring 161 to pass through it. However, this disclosure is not limited thereto.

[0085] The belt spring housing 153 can be configured to rotate without the operation of the motor 151. For example, the belt spring housing 153 can be fixed inside the housing portion HP. Therefore, even if the belt spring cylinder 152 housed in the belt spring housing 153 rotates due to the operation of the motor 151, the belt spring housing 153 can remain stationary. Thus, while providing the belt spring cylinder 152 inside the belt spring housing 153 with the rotational movement of the motor 151 causing the belt spring 161 to wind and unwind around the belt spring cylinder 152, the belt spring housing 153 can be fixed and stationary.

[0086] Reference Figures 5 to 6B Multiple belt spring housing sides 153S can be disposed on two opposite sides of the belt spring housing 153. The belt spring housing sides 153S can cover the side surface of the belt spring sleeve 152 and the motor 151 housed within the belt spring housing 153. Therefore, the multiple belt spring housing sides 153S can be configured to more stably house the motor 151 and the belt spring sleeve 152 within the belt spring housing 153. In this case, as... Figures 5 to 6B As shown, the belt spring housing 153 and the plurality of belt spring housing sides 153S can be configured to be separable. However, the belt spring housing 153 and the plurality of belt spring housing sides 153S can be integrated into a single integral component. This disclosure is not limited thereto. In an embodiment, the roller portion 150 includes two belt spring housing sides 153S corresponding to opposite sides of the roller portion 150, and they can be different from each other. Figure 6A and Figure 6BIn the orientation, except for the center hole 153C1, the left belt spring housing side 153S can be generally closed, the center hole 153C1 accommodating the driver 151D of the motor 151 and enabling the driver 151D to rotate relative to the left belt spring housing side 153S. The right belt spring housing side 153S may have a center hole 153C2 accommodating the belt spring sleeve extension 152E. As a result, the diameter of the center hole 153C1 of the left belt spring housing side 153S is smaller than the diameter of the center hole 153C2 of the right belt spring housing side 153S. Each of the belt spring housing sides 153S may also include a protrusion 153P, which may help secure the roller 150 inside the housing portion HP. In some embodiments, the belt spring housing sides 153S may also have the same construction or some other arrangement.

[0087] In addition, refer to Figures 5 to 6B A belt spring guide 156 (which may also be referred to herein as guide 156 or guide element 156) may also be disposed on the belt spring housing 153. The belt spring guide 156 may be connected to the belt spring housing 153 at a position corresponding to the position of the belt spring 161 housed within the belt spring housing 153. In an embodiment, the belt spring guide 156 is received in a belt spring guide groove 156S in the belt spring housing 153. Figure 6A The belt spring guide 156 includes an extension 156E and an end portion 156T connected to or integrally formed with the extension 156E. The extension 156E may have a square or rectangular cross-sectional shape orthogonal to or perpendicular to the lower end face 153E of the belt spring housing 153, which includes the belt spring guide groove 156S. As a result, the extension 156E extends generally away from the belt spring housing 153 in a direction perpendicular to the end face 153E. The end portion 156T of the belt spring guide 156 is positioned orthogonal to or perpendicular to the extension 156E and has a different shape from the extension 156E. More specifically, the end portion 156T includes an outer surface that includes a flat planar portion 156T1, which is similar to the outer surface of the extension 156E except that the flat planar portion 156T1 may have a greater width than the surface of the extension 156E. The outer surface of end portion 156T also includes a curved portion 156T2, which corresponds to the curvature of the belt spring 161 in its unfolded configuration. The flat planar portion 156T1 facilitates the housing of the belt spring guide 156 within the housing portion HP, while the curved portion 156T2 faces the belt spring 161 and helps guide it, as shown in the reference. Figure 8A and Figure 8BFurther described. Therefore, the belt spring guide 156 can guide the operation of winding or unwinding the belt spring 161 housed in the belt spring housing 153.

[0088] Reference Figure 6A Multiple first bearings BR1 can be disposed between two opposite sides of the belt spring cylinder 152 and multiple belt spring housing sides 153S. The multiple first bearings BR1 can support the two opposite sides of the belt spring cylinder 152, allowing the belt spring cylinder 152 to rotate relative to the belt spring housing 153. In an embodiment, the first bearings BR1 are implemented as rings to reduce the coefficient of friction and support the rotation of the belt spring cylinder 152 relative to the belt spring housing 153. The first bearings BR1 may include ball bearings, rollers, wheels, etc.

[0089] Reference Figure 5 Multiple second bearings BR2 can be disposed outside the sides 153S of multiple belt spring housings. The multiple second bearings BR2 can support multiple rollers 154, such that the multiple rollers 154, described further below, can rotate relative to the belt spring housing 153. The second bearings BR2 can be the same as or different from the first bearing BR1. In embodiments, the number and arrangement of the first bearing BR1 and the second bearing BR2 are selected based on design factors.

[0090] Multiple rollers 154 are disposed outside multiple second bearings BR2, which are disposed outside multiple belt spring housing sides 153S.

[0091] Reference Figure 7A and Figure 7B The roller 154 may generally have a cylindrical shape, but a portion of the roller 154 may have a flat surface. That is, a portion 154F of the outer peripheral surface 154P of the roller 154 is flat, and the remainder of the outer peripheral surface is curved. In the embodiment, and as... Figure 5 and Figure 7A As shown, each of the plurality of rollers 154 may include a roller 154 having a cylindrical shape and a roller side portion 154S configured to cover the side surface of the roller 154 and accommodate the second bearing BR2. However, in some embodiments, the roller 154 and the roller side portion 154S may be integrated into a single integral component. This disclosure is not limited thereto.

[0092] Multiple rollers 154 can be connected to a motor 151. For example, multiple rollers 154 can be directly connected to a motor 151. Alternatively, multiple rollers 154 can house a motor 151 and be indirectly connected to a belt spring cylinder 152 configured to rotate via the motor 151. However, the method of connecting the multiple rollers 154 and the motor 151 can be varied depending on the design, and this disclosure is not limited to the above non-limiting examples.

[0093] Multiple rollers 154 are connected to a motor 151, allowing the rollers 154 to rotate clockwise or counterclockwise via the operation of the motor 151. In this configuration, when the motor 151 is operated, the belt spring cylinder 152, which houses the motor 151 and is rotated by its operation, and the multiple rollers 154 can rotate in the same direction. That is, in some embodiments, the rollers 154 configured to rotate in the same direction as the belt spring cylinder 152 can also be configured to rotate relative to the fixed belt spring housing 153.

[0094] In addition, refer to Figure 5 and Figure 7A The plurality of second bearings BR2 in the roller section 150 may include a total of four second bearings BR2 respectively disposed on two opposite sides of each of the plurality of rollers 154. Therefore, the plurality of second bearings BR2 can support the two opposite sides of the plurality of rollers 154, so that the plurality of rollers 154 can rotate relative to the belt spring housing 153.

[0095] Reference Figure 7A and Figure 7B The substrate 155 may be connected to a plurality of rollers 154 and includes planar portions, such as opposing flat planar main surfaces 155F (which may be referred to herein as planar portions), where “main” means the maximum surface area of ​​any surface of the substrate 155. Specifically, the substrate 155 may be disposed on the flat portion 154F of the outer peripheral surface 154P of each of the plurality of rollers 154.

[0096] The printed circuit board 140 of the display unit DP can be disposed on the planar portion 155F of the substrate 155. Therefore, when the roller 150 performs a winding or unwinding operation, the planar portion of the substrate 155 can support the printed circuit board 140 of the assembly of the display unit DP wound around the roller 150 in a flat shape.

[0097] Reference Figure 8A and Figure 8BA helical spring 170 can be disposed on the belt spring extension 152E. Specifically, one end 171 (i.e., the first end 171) of the helical spring 170 is connected to the roller 154, and the other end 172 (i.e., the second end 172) of the helical spring 170 is connected to the belt spring extension 152. That is, the helical spring 170 can be disposed in the space between the roller 154 and the belt spring extension 152E. For example, one end 171 of the helical spring 170 can be connected to the roller 154 by being inserted into an opening formed in the roller 154. The other end 172 of the helical spring 170 can be connected to the belt spring extension 152E by being inserted into an opening formed in the belt spring extension 152E. In one embodiment, the ends 171, 172 of the helical spring 170 are implemented as curved tabs with a "C"-shaped cross-section, which are inserted into corresponding slits or channels 152C in the roller 154 and the belt spring extension 152E to connect the helical spring 170 to the roller 154 and the belt spring extension 152E. However, this disclosure is not limited thereto, and other constructions using various fasteners, belts, adhesives, etc., are also possible.

[0098] The helical spring 170 is a helical member with elasticity. The helical spring 170 can apply force in the winding direction of the roller 150 using the tension of the spring. That is, when the display unit DP is wound, the elastic force accumulated in the helical spring 170 can increase. Therefore, when the display unit DP is fully unwound, the tension is released and applied to the display unit DP, allowing the display unit DP to remain flat. Furthermore, the display unit DP can be wound more easily.

[0099] Figure 8B An assembled roller section 150 is illustrated, wherein a roller 154 is coupled to the opposite side of a belt spring housing 153, and a substrate 155 is coupled to the flat portion 154F of the roller 154 and extends across the belt spring housing 153. In this embodiment, the substrate 155 provides additional rigidity to the roller section 150 and, in addition to the features and benefits described above, enables the roller section 150 to be wound up uniformly. The belt spring housing 153 can be held stationary or fixed by the housing portion HP, while the remainder of the roller section 150 rotates to cause the display portion DP to wind or unwind around the roller section 150, and also to cause the belt spring 161 to wind or unwind around the belt spring cylinder 152.

[0100] In the following text, reference will be made to Figures 9A to 9C Describe the specific operation of the helical spring 170.

[0101] Operation of coil springs

[0102] Figures 9A to 9CThis is a cross-sectional view illustrating the operation of the helical spring 170 during the winding or unfolding operation of the roller section 150 of the display device 100. For ease of description, Figures 9A to 9C Only the roller 154 of the roller section 150, the helical spring 170, and the belt spring extension 152E of the components of the display device 100 are shown as examples.

[0103] Reference Figures 9A to 9C In the display device 100, both the roller 154 connected to one end 171 of the helical spring 170 and the belt spring extension 152E connected to the other end 172 of the helical spring 170 are configured to rotate. That is, both one end 171 and the other end 172 of the helical spring 170 are configured to be rotatable. Therefore, the energy stored in the helical spring 170 can be maintained at a predetermined level. Furthermore, the difference in sliding between the display unit DP and the roller 150 can be compensated without damaging the display unit DP.

[0104] Reference Figure 9A In a display device 100 according to at least one embodiment, the central axis 171X passing through one end 171 of the helical spring 170 may be arranged on the same line as the central axis 172X passing through the other end 172 of the helical spring 170, or may be aligned with and parallel to the central axis 172X.

[0105] Reference Figure 9B When roller 154 rotates 90 degrees counterclockwise, one end 171 of helical spring 170 can rotate 90 degrees counterclockwise, and the other end 172 of helical spring 170 can rotate approximately 45 degrees counterclockwise due to the difference in diameter between roller 154 and the belt spring extension 152E. The end 171 of helical spring 170 connected to roller 154 can rotate together with roller 154. When the energy stored in helical spring 170 increases to a predetermined level or higher associated with the rotation of belt spring extension 152E, the other end 172 of helical spring 170 connected to belt spring extension 152E can rotate. Specifically, when roller 154 and one end 171 of helical spring 170 begin to rotate, helical spring 170 can further wind around belt spring extension 152E, and the energy stored in helical spring 170 can thus gradually increase. When the helical spring 170 is deformed by an external force, it is characterized by returning to its initial state. Therefore, when the helical spring 170 is deformed by the rotation of one end 171 of the helical spring 170 under the external force applied to the roller 154, the other end 172 of the helical spring 170 can rotate in the same direction as one end 171, causing the helical spring 170 to return to its initial state, i.e., Figure 9AThe state shown is such that the central axis 171X of one end 171 of the helical spring 170 and the central axis 172X of the other end 172 of the helical spring 170 are arranged on the same line.

[0106] In one embodiment, the other end 172 of the helical spring 170 may not rotate simultaneously with one end 171 of the helical spring 170. However, when the energy stored in the helical spring 170 increases to a predetermined level or higher, the other end 172 of the helical spring 170 may rotate. Specifically, the other end 172 of the helical spring 170 is fixed to the belt spring extension 152E, and the belt spring extension 152E is rotated using a predetermined force. Therefore, the other end 172 of the helical spring 170 and the belt spring extension 152E may rotate after the additional energy capable of rotating the belt spring extension 152E is stored in the helical spring 170 through the rotation of one end 171.

[0107] Reference Figure 9CWhen the roller 154 rotates counterclockwise by another 90 degrees, one end 171 of the helical spring 170 can rotate further counterclockwise by 90 degrees, and the other end 172 of the helical spring 170 can rotate counterclockwise while maintaining a predetermined horizontal angle relative to one end 171 of the helical spring 170. In some embodiments, there may be a difference of approximately 45 degrees between the central axis 171X of the end of the helical spring 170 connected to the roller 154 and the central axis 172X of the other end 172 of the helical spring 170 connected to the belt spring extension 152E. Among other things, the difference may also be approximately 45 degrees (i.e., between 42 and 48 degrees) or greater or less than 45 degrees, for example, between 25 and 65 degrees and any value including 25 and 65 degrees. Even as one end 171 of the helical spring 170 and the roller 154 rotate continuously, the angular difference is maintained at a predetermined level between the central axis 171X of one end 171 of the helical spring 170 and the central axis 172X of the other end 172 of the helical spring 170. Therefore, in some embodiments, the energy stored in the helical spring 170 can be maintained at a predetermined level associated with a difference of approximately 45 degrees between the central axes 171X and 172X. In the display device 100 according to at least some embodiments of the present disclosure, the belt spring extension 152E and the roller 154 are rotatably connected, and both one end 171 and the other end 172 of the helical spring 170 are configured to be rotatable. Therefore, the tension of the helical spring 170 can be maintained at a level that can compensate for the slippage of the display unit DP and the slippage of the roller 150 without damaging the display unit DP. In other words, the energy stored in the helical spring 170 during the rotation of the roller 150 is maintained throughout the entire rotation of the roller 150 in order to maintain the tension in the helical spring 170, which compensates for the sliding of the display DP and the roller 150 during operation.

[0108] Winding and unwinding operations of the roller section

[0109] Figure 10A and Figure 10B This is a cross-sectional view illustrating the winding and unwinding operation of the roller portion 150 of a display device 100 according to one or more embodiments of the present disclosure. For ease of description, Figure 10A and Figure 10B Only the motor 151, belt spring cylinder 152, belt spring housing 153 and belt spring guide 156 of the roller 150 assembly are shown as examples.

[0110] Reference Figure 10A and Figure 10BIn the display device 100 according to the present disclosure, when the roller 150 performs a winding or unfolding operation, the display unit DP can be wound around or unfolded from the outer peripheral surface of the roller 150, and the belt spring 161 connected to the head rod 162 can be correspondingly arranged to be accommodated in the roller 150 or extend from the roller 150.

[0111] First, refer to Figure 10A When the roller portion 150 is wound, the belt spring 161 can be accommodated within the roller portion 150. Specifically, the belt spring 161 can be accommodated between the belt spring cylinder 152 and the belt spring housing 153, which is rotated by the motor 151, and the belt spring housing 153 is fixed in the housing portion HP so as not to rotate within the display device 100. In an embodiment, the belt spring 161 can be connected to the belt spring cylinder 152 and wound around the outer peripheral surface 152O of the belt spring cylinder 152.

[0112] Furthermore, the display unit DP, connected to the belt spring 161 via the head rod 162, can be wound around the outer peripheral surface 150P of the roller 150. That is, the display unit DP can be positioned along the outer peripheral surface 153O of the belt spring housing 153 of the roller 150. Although in Figure 10A Although not shown, the display unit DP can be connected to a plurality of rollers 154 disposed on two opposite sides of the belt spring housing 153, connected to a motor 151 disposed in the belt spring housing 153, and configured to rotate. Therefore, even if the belt spring housing 153 is fixedly disposed and does not rotate in the display device 100, the display unit DP can be wound along the outer peripheral surface of the belt spring housing 153 by the rotation of the plurality of rollers 154.

[0113] Next, refer to Figure 10B When the roller 150 performs an unfolding operation, the belt spring 161 can extend from the interior of the roller 150. Specifically, the belt spring 161 can be unfolded from the belt spring cylinder 152 by rotation of the belt spring cylinder 152. In this case, the belt spring 161 can be unfolded from the belt spring cylinder 152 and unfolded in the width direction by the belt spring guide 156, while maintaining rigidity in the upward / downward direction.

[0114] As a result, the head rod 162, connected to the upper end of the belt spring 161, can move in the upward direction. The display unit DP, connected to the head rod 162, can also move in the upward direction, wherein the weight of the head rod 162 and the display unit DP is at least partially supported by the belt spring 161. Therefore, the display unit DP can unfold from the outer peripheral surface 153O of the belt spring housing 153 of the roller portion 150.

[0115] In addition, refer to Figure 10A and Figure 10B The display portion DP can have a certain length, and the roller portion 150 can have a circumference, such that the roller portion 150 rotates once to completely wind the display portion DP along the outer circumferential surface of the roller portion 150. In other words, in the embodiment, the length of the display portion DP corresponds to the circumference of the roller portion 150. This arrangement is also preferred to prevent interference between the substrate 155 and the protrusion 153P of the side portion 153S of the belt spring housing. In the embodiment, the protrusion 153P prevents excessive rotation of the roller portion 150 by contacting the substrate 155. Therefore, when the roller portion 150 performs a winding or unwinding operation, the display portion DP can move more stably downward or upward relative to the roller portion 150.

[0116] In the display device 100 according to an embodiment of the present disclosure, a roller 150 for winding or unwinding the display section DP and a motor 151 for operating a belt spring 161 to move the display section DP in an upward / downward direction are disposed in the same space. In other words, the motor 151 is located inside the belt spring housing 153 of the roller 150, and the belt spring 161 is positioned inside a roller 154 connected to the belt spring housing 153 to reduce the space occupied by the roller 150. Therefore, the operating space of the display device 100 can be minimized and / or reduced.

[0117] In existing display devices, a motor is configured to operate a lifting section for moving the display section in an upward / downward direction, and a roller section is configured to wind or unwind the display section. The motor and roller sections are arranged separately. That is, when the motor shaft rotates, the lifting section moves in an upward / downward direction, causing the display section connected to the lifting section to wind around or unwind from the roller section. Therefore, in existing display devices, separate spaces are required for the motor and roller sections. For this reason, it is difficult to ensure efficient space utilization of the display device, and the overall volume of the display device increases.

[0118] Therefore, in the display device 100 according to an embodiment of the present disclosure, the belt spring 161 can be used as a lifting portion for moving the display unit DP in an upward and / or downward direction, and the belt spring 161 can also be accommodated in the roller portion 150 to reduce space. The display unit DP is wound around or unfolded from the outer peripheral surface 150P of the roller portion 150, which accommodates and rotates the motor 151. Therefore, the motor 151 is configured to move the belt spring 161 in an upward and / or downward direction, and is accommodated in the roller portion 150 and rotates with the roller portion 150, so that the motor 151 and the roller portion 150 can be integrated. Therefore, in the display device 100 according to an embodiment of the present disclosure, the roller portion 150 that winds or unfolds the display unit DP and the motor 151 that operates the belt spring 161 that moves the display unit DP in an upward and / or downward direction are provided in the same space. Therefore, the operating space of the display device 100 can be minimized and / or reduced, and the space utilization of the display device 100 can be improved.

[0119] Figure 11A This is a perspective view of the roller portion of a display device 1100 according to an embodiment of the present disclosure. Figure 11B This is a cross-sectional view of the roller portion of the display device 1100 according to this disclosure. In addition to what is provided below, Figure 11A and Figure 11B The display device 1100 shown is structurally compatible with... Figures 1A to 10B The display device 100 shown is substantially the same. Therefore, repeated descriptions of identical components will be omitted.

[0120] Reference Figure 11A and Figure 11B The roller section 150 may also include a guide member GM.

[0121] In the display device 1100 according to an embodiment of the present disclosure, a guide member GM is also disposed between the belt spring sleeve 152 and the belt spring housing 153, so that the belt spring 161 can be wound or unwound more stably.

[0122] Specifically, a guide member GM can be disposed between the belt spring sleeve 152 and the belt spring housing 153, and configured to guide the belt spring 161. The guide member GM can also be disposed on a portion of the outer peripheral surface 152O of the belt spring sleeve 152, and mitigate the rapid change in shape that occurs when the belt spring 161 disposed between the belt spring sleeve 152 and the belt spring housing 153 is deployed. In the embodiment, and referring to… Figure 11BThe outer surface of the guide member GM is formed as a curved surface, and the curvature of the curved outer surface of the guide member GM can be different from the curvature of the outer peripheral surface 152O of the belt spring cylinder 152. Therefore, when the belt spring 161 is unfolded, the guide member GM can help to gradually form the curved shape of the belt spring 161. Therefore, in the display device 1100 according to the embodiment of the present disclosure, the guide member GM is also disposed between the belt spring cylinder 152 and the belt spring housing 153, so that the belt spring 161 can be wound or unfolded more stably, and the display device 1100 can be operated more stably.

[0123] The exemplary embodiments disclosed herein may also be described and / or summarized as follows.

[0124] According to one or more embodiments of the present disclosure, a display device includes: a display including a display panel configured to display an image; a roller configured to wind or unwind the display; and a belt spring configured to move the display in an upward or downward direction in cooperation with the roller; wherein the roller includes: a motor; a belt spring sleeve housing and connected to the motor, a first end of the belt spring being fixed to the belt spring sleeve and the belt spring sleeve being configured to wind or unwind the belt spring; a belt spring housing housing the belt spring sleeve and the belt spring; and a plurality of rollers connected to opposite sides of the motor.

[0125] The roller may also include a belt spring guide connected to the belt spring housing, the belt spring guide being configured to guide the winding or unwinding operation of the belt spring, the belt spring being housed in the belt spring housing.

[0126] The display device may further include a printed circuit board connected to the display and configured to provide signals to the display.

[0127] The roller may further include a substrate connected to the plurality of rollers, the substrate having a planar portion for supporting the printed circuit board, and wherein the printed circuit board may be disposed on the planar portion of the substrate.

[0128] The display has a length that rotates once along the outer peripheral surface of the roller in response to the display being wound.

[0129] The roller may further include a guide member disposed between the belt spring cylinder and the belt spring housing, the guide member being configured to guide the belt spring.

[0130] The outer surface of the guide member is a curved surface, and the curvature of the curved surface is different from the curvature of the outer peripheral surface of the belt spring cylinder.

[0131] The roller section may also include a spring-loaded helical spring, wherein a first end of the helical spring is connected to one of the plurality of rollers, and a second end of the helical spring is connected to the belt spring cylinder.

[0132] The belt spring cylinder may include an extension that extends from the inside of the belt spring housing to the outside of the belt spring housing, and a second end of the helical spring is connected to the extension of the belt spring cylinder.

[0133] The belt spring is configured to accumulate elastic force in response to the display being wound.

[0134] The roller section may also include a plurality of first bearings disposed on two opposite sides of the belt spring cylinder, the plurality of first bearings being configured to support the belt spring cylinder and enable the belt spring cylinder to rotate relative to the belt spring housing.

[0135] The roller section may further include a plurality of second bearings disposed on two opposite sides of each of the plurality of rollers and configured to support the two opposite sides of each of the rollers and enable the plurality of rollers to rotate relative to the belt spring housing.

[0136] The roller may also include a motor holder connected to the belt spring cylinder and configured to cover the motor disposed in the belt spring cylinder.

[0137] According to one or more embodiments of the present disclosure, a display device includes: a display configured to display an image; a belt spring coupled to the display; and a roller configured to wind or unwind the display and the belt spring, the roller including: a motor; a belt spring sleeve housing and connected to the motor, the belt spring sleeve being configured to wind or unwind the belt spring; a belt spring housing housing the belt spring sleeve and the belt spring; and a plurality of rollers connected to opposite sides of the motor.

[0138] The roller may also include a helical spring connected to one of the plurality of rollers and the belt spring cylinder, the helical spring being configured to accumulate elastic force in response to the display being wound around the roller.

[0139] The roller may also include a substrate connected to a flat portion of the plurality of rollers, the substrate having at least one planar surface.

[0140] The display device may further include a printed circuit board connected to the display, the printed circuit board being disposed on at least one planar surface of the substrate.

[0141] The display may have a length corresponding to the circumference of the roller.

[0142] According to one or more embodiments of the present disclosure, a display device includes: a roller configured to wind or unwind a display; and a belt spring coupled to the display, the roller including: a belt spring housing; a belt spring cylinder configured to wind or unwind the belt spring, at least a portion of the belt spring cylinder being internal to the belt spring housing; a motor connected to the belt spring cylinder, at least a portion of the motor being internal to the belt spring cylinder; and a roller connected to the motor.

[0143] The roller may also include a guide element having at least one curved surface configured to guide the curved surface of the belt spring.

[0144] The roller may also include a helical spring connected to the roller and the belt spring cylinder, the helical spring being configured to accumulate elastic force due to the diameter difference between the roller and the belt spring cylinder.

[0145] The roller may have a flat portion, and the display device may further include a printed circuit board connected to the display, the printed circuit board being disposed on the flat portion of the roller.

[0146] In one or more embodiments of this disclosure, a display device includes: a display configured to display an image; a belt spring coupled to the display; and a roller configured to wind or unwind the display and the belt spring, the roller including: a motor; a belt spring sleeve housing and connected to the motor, the belt spring sleeve being configured to wind or unwind the belt spring; a belt spring housing housing the belt spring sleeve and the belt spring; and a plurality of rollers connected to opposite sides of the motor.

[0147] The roller may also include a helical spring connected to one of the plurality of rollers and the belt spring cylinder, the helical spring being configured to accumulate elastic force in response to the display being wound around the roller.

[0148] The roller may further include a substrate coupled to a flat portion of the plurality of rollers, the substrate having at least one planar surface, and the display device further includes a printed circuit board coupled to the display, the printed circuit board being disposed on the at least one planar surface of the substrate.

[0149] The display may have a length corresponding to the circumference of the roller.

[0150] In one or more embodiments of this disclosure, a display device includes: a roller configured to wind or unwind a display; and a belt spring coupled to the display, the roller including: a belt spring housing; a belt spring cylinder configured to wind or unwind the belt spring, at least a portion of the belt spring cylinder being internal to the belt spring housing; a motor connected to the belt spring cylinder, at least a portion of the motor being internal to the belt spring cylinder; and a roller connected to the motor.

[0151] The roller may also include a guide element having at least one curved surface configured to guide the curved surface of the belt spring.

[0152] The roller may also include a helical spring connected to the roller and the belt spring cylinder, the helical spring being configured to accumulate elastic force due to the diameter difference between the roller and the belt spring cylinder.

[0153] The roller may have a flat portion, and the display device further includes a printed circuit board connected to the display, the printed circuit board being disposed on the flat portion of the roller.

[0154] Although exemplary embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not limited thereto and may be implemented in many different forms without departing from the technical concept of the present disclosure. Therefore, the exemplary embodiments of the present disclosure are provided for illustrative purposes only and are not intended to limit the technical concept of the present disclosure. The scope of the technical concept of the present disclosure is not limited thereto. Therefore, it should be understood that the above exemplary embodiments are illustrative in all respects and do not limit the present disclosure. The scope of protection of the present disclosure should be interpreted based on the appended claims, and all technical concepts within the equivalent scope thereof should be interpreted as falling within the scope of the present disclosure.

[0155] The various embodiments described above can be combined to provide other embodiments. All U.S. patents, U.S. patent application publications, U.S. patent applications, foreign patents, foreign patent applications, and non-patent publications cited and / or listed in the application data sheets are incorporated herein by reference in their entirety. If necessary, aspects of the embodiments can be modified to employ the concepts of various patents, applications, and publications to provide other embodiments.

[0156] In view of the above detailed description, these and other changes may be made to the embodiments. Generally, the terminology used in the appended claims should not be construed as limiting the claims to the specific embodiments disclosed in the specification and claims, but should be construed as including all possible embodiments and the full scope of equivalents to these claims. Therefore, the claims are not limited to this disclosure.

[0157] Cross-reference to related applications

[0158] This application claims priority to Korean Patent Application No. 10-2021-0192892, filed on December 30, 2021, with the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference.

Claims

1. A display device, the display device comprising: A display, the display including a display panel configured to display an image; A roller configured to wind or unfold the display; as well as A belt spring, configured to move the display in an upward or downward direction in cooperation with the roller. The roller includes: motor; A belt spring sleeve that houses and is connected to the motor, a first end of a belt spring being fixed to the belt spring sleeve, and the belt spring sleeve being configured to wind or unwind the belt spring. A belt spring housing, the belt spring housing accommodating the belt spring sleeve and the belt spring; and Multiple rollers are connected to opposite sides of the motor.

2. The display device according to claim 1, wherein, The roller also includes a belt spring guide connected to the belt spring housing, the belt spring guide being configured to guide the winding or unwinding operation of the belt spring housed in the belt spring housing.

3. The display device according to claim 1, further comprising: A printed circuit board, connected to the display and configured to provide signals to the display. The roller further includes a substrate connected to the plurality of rollers, the substrate having a planar portion for supporting the printed circuit board, and The printed circuit board is disposed on the planar portion of the substrate.

4. The display device according to claim 1, wherein, The display has a length that rotates once along the outer peripheral surface of the roller in response to the display being wound.

5. The display device according to claim 1, wherein, The roller also includes a guide member disposed between the belt spring cylinder and the belt spring housing, the guide member being configured to guide the belt spring.

6. The display device according to claim 5, wherein, The outer surface of the guide member is a curved surface, and the curvature of the curved surface is different from the curvature of the outer peripheral surface of the belt spring cylinder.

7. The display device according to claim 1, wherein, The roller also includes a spring-loaded helical spring, wherein a first end of the helical spring is connected to one of the plurality of rollers, and a second end of the helical spring is connected to the belt spring cylinder.

8. The display device according to claim 7, wherein, The belt spring cylinder includes an extension that extends from the interior of the belt spring housing to the exterior of the belt spring housing, and the second end of the helical spring is connected to the extension of the belt spring cylinder.

9. The display device according to claim 7, wherein, The helical spring is configured to accumulate elastic force in response to the display being wound.

10. The display device according to claim 1, wherein, The roller also includes a plurality of first bearings disposed on two opposite sides of the belt spring cylinder, the plurality of first bearings being configured to support the belt spring cylinder and enable the belt spring cylinder to rotate relative to the belt spring housing.

11. The display device according to claim 10, wherein, The roller also includes a plurality of second bearings disposed on two opposite sides of each of the plurality of rollers and configured to support the two opposite sides of each of the rollers and enable the plurality of rollers to rotate relative to the belt spring housing.

12. The display device according to claim 1, wherein, The roller also includes a motor holder connected to the belt spring cylinder and configured to cover the motor disposed within the belt spring cylinder.

13. A display device, the display device comprising: A display configured to display an image; A belt spring, which is connected to the display and moves the display in an upward or downward direction; as well as A roller configured to wind or unwind the display and the belt spring, the roller comprising: motor; A belt spring sleeve that houses and is connected to the motor, the belt spring sleeve being configured to wind or unwind the belt spring; A belt spring housing, the belt spring housing accommodating the belt spring sleeve and the belt spring; and Multiple rollers are connected to opposite sides of the motor.

14. The display device according to claim 13, wherein, The roller also includes a helical spring connected to one of the plurality of rollers and the belt spring cylinder, the helical spring being configured to accumulate elastic force in response to the display being wound around the roller.

15. The display device according to claim 13, wherein, The roller further includes a substrate connected to a flat portion of the plurality of rollers, the substrate having at least one planar surface, and the display device further includes: A printed circuit board, the printed circuit board being coupled to the display, the printed circuit board being disposed on at least one planar surface of the substrate.

16. The display device according to claim 13, wherein, The display has a length corresponding to the circumference of the roller.

17. A display device, the display device comprising: A roller and a belt spring, the roller being configured to wind or unwind the display, the belt spring being coupled to the display and moving the display in an upward or downward direction, the roller comprising: Belt spring housing; A belt spring sleeve, the belt spring sleeve being configured to wind or unwind the belt spring, at least a portion of the belt spring sleeve being inside the belt spring housing; A motor, the motor being connected to the belt spring cylinder, at least a portion of the motor being inside the belt spring cylinder; and A roller connected to the motor.

18. The display device according to claim 17, wherein, The roller also includes a guide element having at least one curved surface configured to guide the curved surface of the belt spring.

19. The display device according to claim 17, wherein, The roller also includes a helical spring connected to the roller and the belt spring cylinder, the helical spring being configured to accumulate elastic force due to the diameter difference between the roller and the belt spring cylinder.

20. The display device according to claim 17, wherein, The roller has a flat portion, and the display device further includes: A printed circuit board, which is connected to the display, is disposed on the flat portion of the roller.

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