Display device

Abstract

A display device is provided. The display device includes a display module; and a folding kit disposed under the display module and defining a first rotation axis and a second rotation axis each extending in a first direction. Here, a first axis parallel to a second direction and superposed with a first surface of the display module and a second axis perpendicular to the first surface of the display module at a center of the folding kit are defined. Further, a first coordinate of the second rotation axis is determined by a formula (G / 2)+T≤X≤(L / 2). Here, X denotes the first coordinate, G denotes a distance between a first non-folding area and a second non-folding area of the display module, T denotes a thickness of the display module measured with respect to the second axis, and L denotes a length of a folding area when the display module is unfolded.

Description

[0001] This application claims priority to Korean Patent Application No. 10-2020-0107977, filed on August 26, 2020, and Korean Patent Application No. 10-2020-0146721, filed on November 5, 2020, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0002] The embodiments of the invention herein relate to a display device, and more specifically, to a foldable display device. Background Technology

[0003] Electronic devices that provide images to users (e.g., smartphones, digital cameras, laptops, navigation units, and smart TVs) include display devices for displaying images. The display device generates images to provide the generated images to the user via a screen.

[0004] In recent years, with the development of display device technology, various types of display devices are being developed. For example, various flexible display devices that can deform, fold, and roll into curved shapes have been developed. Flexible display devices that can deform into various shapes can be portable, thus increasing user convenience.

[0005] A foldable display device within a flexible display device includes a display module that is foldable relative to a folding axis extending in one direction. The display module folds or unfolds relative to the folding axis. The display module includes a folding area that bends during the folding operation. Summary of the Invention

[0006] Embodiments of the invention provide a display device including a hinge for folding a display module into a dumbbell shape.

[0007] An embodiment of the invention provides a display device comprising: a display module including a first non-foldable region, a second non-foldable region, and a foldable region located between the first and second non-foldable regions; and a folding kit disposed on a first surface of the display module and defining a first rotation axis and a second rotation axis, both extending along a first direction. Here, the foldable region, the first non-foldable region, and the second non-foldable region are arranged along a second direction intersecting the first direction, and a first axis parallel to the second direction and superimposed on the second surface of the display module, and a second axis perpendicular to the second surface of the display module at the center of the folding kit, are defined, with the second surface of the display module opposite to the first surface. Furthermore, the first coordinate of the second rotation axis is determined by the formula (G / 2) + T ≤ X ≤ (L / 2). Here, X represents the first coordinate, G represents the distance between the first and second non-foldable regions when the display module is folded, T represents the thickness of the display module measured relative to the second axis, and L represents the length of the foldable region relative to the second direction when the display module is unfolded.

[0008] In an embodiment of the invention, the display device includes: a display module including a first non-foldable region, a foldable region, and a second non-foldable region arranged along a second direction intersecting the first direction; and a folding kit disposed on a first surface of the display module and defining a first rotation axis and a second rotation axis, both extending along the first direction and spaced apart from each other in the second direction. Here, a first axis parallel to the second direction and superimposed on the second surface of the display module, and a second axis perpendicular to the second surface of the display module at the center of the folding kit are defined, the second surface of the display module being opposite to the first surface of the display module, and the first rotation axis being symmetrical with respect to the second rotation axis. Furthermore, the first and second coordinates of the second rotation axis are determined by the formulas (G / 2) + T ≤ X ≤ (L / 2) and Y = -X + (G / 2). Here, X represents the first coordinate, G represents the distance between the first and second non-foldable regions when the display module is folded, T represents the thickness of the display module measured relative to the second axis, L represents the length of the foldable region relative to the second direction when the display module is unfolded, and Y represents the second coordinate. Attached Figure Description

[0009] The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings:

[0010] Figure 1 This is a perspective view showing an embodiment of a display device according to the invention;

[0011] Figure 2 It is shown Figure 1 A view of the folded state of the display device;

[0012] Figure 3 It is shown Figure 1 A plan view of the display device in the image;

[0013] Figure 4 It is shown Figure 1 A schematic cross-sectional view of the display device in the diagram;

[0014] Figure 5 It is shown Figure 4 A cross-sectional view of the display panel in the image;

[0015] Figure 6 To show in more detail Figure 1 A plan view of the display device;

[0016] Figure 7 It is shown Figure 6 Exploded perspective view of the display device in the image;

[0017] Figure 8 It is shown Figure 7 A floor plan of the folding set;

[0018] Figure 9 It is shown Figure 8 Exploded perspective view of the folding kit in the image;

[0019] Figure 10 It is shown Figure 9 Exploded perspective view of the first hinge in the middle;

[0020] Figure 11 This shows what happens when viewed along the first direction. Figure 10 The front view of the first frame in the first frame;

[0021] Figure 12 It is shown Figure 10 The internal transparent perspective view of the second frame in the image;

[0022] Figure 13 It is shown Figure 10 An exploded perspective view of the torque control section;

[0023] Figure 14 It is shown that Figure 9 and Figure 10 A view showing the state in which the first hinge is engaged with the first and second bodies;

[0024] Figure 15 It shows the setting Figure 14 The view of the components in the first and second frames;

[0025] Figure 16A and Figure 16B It is used for explanation Figure 15 A view of the operation of the first rotary cam and the first movable cam in the image;

[0026] Figure 17A It is shown Figure 8 A view of the unfolded state of the folding kit;

[0027] Figure 17B It is shown Figure 17A A view of the folded state of the folding kit;

[0028] Figure 18A It is along Figure 14 A sectional view taken by line I-I';

[0029] Figure 18B and Figure 18C It is used for explanation Figure 18A A view of the folded state of the folding kit;

[0030] Figure 19A It is along Figure 14 A sectional view taken from line II-II';

[0031] Figure 19B and Figure 19C It is used for explanation Figure 19A A view of the folded state of the folding kit;

[0032] Figure 20 It is shown Figure 19C A magnified view of the display module in the image;

[0033] Figure 21 It is done by adding the X-axis and Y-axis Figure 19C The view obtained;

[0034] Figure 22 It shows the first and second rotation axes relative to each other. Figure 21 A graph showing the X and Y coordinates of the X and Y axes;

[0035] Figure 23 This is a view showing the first and second wing plates rotating along a first and a second rotation axis set in their normal positions;

[0036] Figure 24 and Figure 25 This is a view showing the first and second wing plates rotating along a first and second rotation axis that are off-center from their normal positions;

[0037] Figure 26 and Figure 27 This shows when the first and second wing plates are along Figure 24 and Figure 25 A view showing the state of the display device as the first and second rotating axes, which are deviated from their normal positions, rotate.

[0038] Figure 28 It is shown Figure 19C An enlarged view of the first region A1; Figure 29 It is shown Figure 28 A view of the unfolded state of the second inverse curvature portion;

[0039] Figure 30 It is along Figure 14 The sectional view taken by line III-III'; and

[0040] Figure 31 It is shown Figure 30 A view of the unfolded state of the second inverse curvature section. Detailed Implementation

[0041] In this specification, it will also be understood that when a component (or region, layer, part) is referred to as being "on" another component, "connected to" or "integrated into" another component, the component may be directly disposed on / connected to / integrated into the other component, or there may be an intermediate third component.

[0042] The same reference numerals always denote the same elements. Furthermore, for clarity, the thickness, proportions, and dimensions of components are exaggerated in the accompanying drawings.

[0043] The term “and / or” includes any and all combinations of one or more of the relevant listed items.

[0044] It will be understood that although terms such as “first” and “second” are used herein to describe various elements, these elements should not be limited by these terms. Terms are used only to distinguish one component from others. For example, a first element referred to as a first element in one embodiment may be referred to as a second element in another embodiment without departing from the scope of the appended claims. Unless otherwise stated, singular terms may include plural forms.

[0045] In addition, terms such as "below," "under," "above," and "above" are used to describe the relationships between the components shown in the accompanying drawings. The terms can be relative concepts and are described based on the directions expressed in the drawings.

[0046] Given the measurements discussed and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system), as used herein, “about” or “approximately” includes the stated value and indicates an acceptable deviation from the particular value as determined by one of ordinary skill in the art. For example, “about” may mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0047] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art. Terms defined in a general dictionary shall be interpreted as having the same meaning as in the relevant technical context, and unless explicitly defined in the description, terms shall not be idealized or over-interpreted as having a formal meaning.

[0048] The meaning of "includes" or "contains" is to indicate a property, a fixed quantity, a step, an operation, an element, a component, or a combination thereof, but does not exclude other properties, fixed quantities, steps, operations, elements, components, or combinations thereof.

[0049] In the following description, embodiments of the invention will be described in detail with reference to the accompanying drawings.

[0050] Figure 1 This is a perspective view showing an embodiment of a display device according to the invention. Figure 2 It is shown Figure 1 A view of the folded state of the display device.

[0051] Reference Figure 1 In embodiments of the invention, the display device DD may have a quadrilateral (e.g., rectangular) shape, comprising long sides extending along a first direction DR1 and short sides extending along a second direction DR2 intersecting the first direction DR1. However, the invention is not limited thereto. In embodiments, for example, the display device DD may have various shapes such as circular or polygonal. The display device DD may be a flexible display device.

[0052] In the following text, the direction that intersects the plane defined by the first direction DR1 and the second direction DR2 in a substantially perpendicular manner is defined as the third direction DR3. In this specification, the expression "in a plan view" can be defined as the state viewed from the third direction DR3.

[0053] The display device DD may include a folded region FA and multiple non-folded regions NFA1 and NFA2. The non-folded regions NFA1 and NFA2 may include a first non-folded region NFA1 and a second non-folded region NFA2. The folded region FA may be disposed between the first non-folded region NFA1 and the second non-folded region NFA2. The folded region FA, the first non-folded region NFA1, and the second non-folded region NFA2 may be arranged along a second direction DR2.

[0054] Although a folded region FA and two non-folded regions NFA1 and NFA2 are shown, the invention is not limited to the number of each of the folded region FA and the non-folded regions NFA1 and NFA2. In embodiments, for example, the display device DD may include two or more non-folded regions and a plurality of folded regions disposed therebetween.

[0055] The top surface of the display device DD can be defined as a display surface DS, and the display surface DS has a plane defined by a first direction DR1 and a second direction DR2. The image IM generated from the display device DD can be provided to the user through the display surface DS.

[0056] The edge portion EG can be positioned around the display surface DS. The edge portion EG may not display an image. The edge portion EG can surround the display surface DS and define an edge of the display device DD printed with a predetermined color.

[0057] The display device DD may include a plurality of sensors SN and at least one camera CM. Each of the sensors SN and camera CM may be configured to be adjacent to an edge of the display device DD. Each of the sensors SN and camera CM may be disposed adjacent to an edge portion EG on the display surface DS. Each of the sensors SN and camera CM may be disposed in a first non-folding region NFA1 and a second non-folding region NFA2.

[0058] In an embodiment, for example, each of the sensor SNs can be a proximity sensor. However, the invention is not limited to the type of sensor SNs. The camera CM can capture external images.

[0059] Reference Figure 2 The display device DD can be a foldable (foldable) display device DD that can be folded or unfolded. In an embodiment, for example, the display device DD can be folded such that the folded region FA is bent relative to a folding axis FX parallel to the first direction DR1. The folding axis FX can be defined as a long axis parallel to the long side of the display device DD.

[0060] When the display device DD is folded, the first non-folded region NFA1 and the second non-folded region NFA2 can face each other, and the display device DD can be folded inward so that the display surface DS is not exposed to the outside.

[0061] Figure 3 It is shown Figure 1 A plan view of the display device.

[0062] Reference Figure 3 The display device DD may include a display panel DP, a scan driver SDV, a data driver DDV, and a transmit driver EDV.

[0063] The display panel DP may include a first region AA1, a second region AA2, and a curved region BA disposed between the first region AA1 and the second region AA2. The curved region BA may extend along a first direction DR1, and the first region AA1, the curved region BA, and the second region AA2 may be arranged along a second direction DR2.

[0064] The first region AA1 may include a display region DA and a non-display region NDA disposed around the display region DA. The non-display region NDA may surround the display region DA. The display region DA may display an image, and the non-display region NDA may not display an image. Each of the second region AA2 and the curved region BA may not display an image.

[0065] When viewed on a third-party DR3, the first region AA1 may include a first non-folded region NFA1, a second non-folded region NFA2, and a folded region FA disposed between the first non-folded region NFA1 and the second non-folded region NFA2.

[0066] The display panel (DP) may include multiple pixels (PX), multiple scan lines SL1 to SLm, multiple data lines DL1 to DLn, multiple emission lines EL1 to ELm, a first control line CSL1 and a second control line CSL2, a power line PL, a connection line CNL, and multiple pads (or "soldering pads") (PD). Here, m and n are natural numbers. Pixels (PX) may be located in the display area (DA) and connected to scan lines SL1 to SLm, data lines DL1 to DLn, and emission lines EL1 to ELm.

[0067] The scan driver SDV and transmit driver EDV may be disposed in the non-display area NDA. Each of the scan driver SDV and transmit driver EDV may be disposed in the non-display area NDA adjacent to each of the two sides of the first area AA1, said sides being opposite each other in the first direction DR1. The data driver DDV may be disposed in the second area AA2. The data driver DDV may be manufactured in the form of an integrated circuit (“IC”) chip and disposed (e.g., mounted) in the second area AA2.

[0068] Scan lines SL1 to SLm can all extend along the first direction DR1 and connect to the scan driver SDV. Data lines DL1 to DLn can all extend along the second direction DR2 and connect to the data driver DDV through the bend region BA. Transmit lines EL1 to ELm can all extend along the first direction DR1 and connect to the transmit driver EDV.

[0069] The power line PL can extend along the second direction DR2 and be disposed in the non-display area NDA. Although the power line PL can be disposed between the display area DA and the transmit driver EDV, the invention is not limited thereto. In an embodiment, for example, the power line PL can be disposed between the display area DA and the scan driver SDV.

[0070] The power line PL can extend to the second region AA2 through the bend region BA. In the plan view, the power line PL can extend towards the lower end of the second region AA2. The power line PL can receive the drive voltage.

[0071] The connecting lines CNL can all extend along the first direction DR1 and be arranged along the second direction DR2. The connecting lines CNL can be connected to the power line PL and the pixel PX. The driving voltage can be applied to the pixel PX through the power line PL and the connecting lines CNL that are connected to each other.

[0072] The first control line CSL1 can be connected to the scan driver SDV and extends through the bend region BA toward the lower end of the second region AA2. The second control line CSL2 can be connected to the transmit driver EDV and extends through the bend region BA toward the lower end of the second region AA2. The data driver DDV can be located between the first control line CSL1 and the second control line CSL2.

[0073] When viewed from a plane, the pad PD can be positioned adjacent to the lower end of the second area AA2. The data driver DDV, power line PL, first control line CSL1, and second control line CSL2 can be connected to the pad PD.

[0074] Data lines DL1 to DLn can be connected to corresponding pads PD via data driver DDV. In an embodiment, for example, data lines DL1 to DLn can be connected to data driver DDV, and data driver DDV can be connected to pads PD corresponding to data lines DL1 to DLn respectively.

[0075] Although not shown, a printed circuit board (“PCB”) can be configured to connect to the pad PD. A timing controller and voltage generation section can be mounted on the PCB. The timing controller can be manufactured as an IC chip and mounted (e.g., installed) onto the PCB. The timing controller and voltage generation section can be connected to the corresponding pad PD via the PCB.

[0076] The timing controller can control the operation of each of the scan driver (SDV), data driver (DDV), and transmit driver (EDV). The timing controller can generate scan control signals, data control signals, and transmit control signals in response to control signals received from an external source. The voltage generation section can generate drive voltages.

[0077] The scan control signal can be provided to the scan driver SDV via the first control line CSL1. The transmit control signal can be provided to the transmit driver EDV via the second control line CSL2. The data control signal can be provided to the data driver DDV. The timing controller can receive image signals from the outside and convert the data format of the image signals to match the interface specification of the data driver DDV, thereby providing the converted image signals to the data driver DDV.

[0078] The scan driver SDV can generate multiple scan signals in response to a scan control signal. These scan signals can be applied to pixels PX via scan lines SL1 to SLm. The scan signals can be applied to pixels PX sequentially.

[0079] The data driver DDV can generate multiple data voltages corresponding to the image signal in response to a data control signal. These data voltages can be applied to pixel PX via data lines DL1 to DLn. The transmit driver EDV can generate multiple transmit signals in response to a transmit control signal. These transmit signals can be applied to pixel PX via transmit lines EL1 to ELm.

[0080] A pixel PX can receive a data voltage in response to a scan signal. A pixel PX can display an image by emitting light with a brightness corresponding to the data voltage in response to a transmit signal. A pixel PX can have an emission time controlled by the transmit signal.

[0081] Although not shown, when the curved region BA is curved, the second region AA2 can be positioned below the first region AA1. Therefore, the data driver DDV can be positioned below the first region AA1 without being identified from the outside.

[0082] Figure 4 It is shown Figure 1 A schematic cross-sectional view of the display device in the image.

[0083] Despite Figure 4 The diagram shows a cross-section of the display device DD in the first direction DR1, but for ease of description, the cross-sections of each of the curved region BA and the second region AA2 are omitted.

[0084] Reference Figure 4The display device DD may include a display module DM. The display module DM may be a flexible display module. The display device DD may include a folding kit for supporting and folding the display module DM. The following will... Figure 7 The structure of the folding kit is shown in the image.

[0085] Similar to the display device DD, the display module DM may include a first non-folding region NFA1, a folding region FA, and a second non-folding region NFA2 arranged along a second direction DR2. The folding region FA may include a curved portion CSP, a first extension portion EX1 disposed between the curved portion CSP and the first non-folding region NFA1, and a second extension portion EX2 disposed between the curved portion CSP and the second non-folding region NFA2. Each of the first extension portion EX1 and the second extension portion EX2 may extend from the curved portion CSP.

[0086] The display module DM may include a display panel DP, an anti-reflective layer RPL, a window WIN, a window protective layer WP, a panel protective layer PPL, a printed layer PIT, a support plate SPT, a buffer layer CUL, and a coating BCT.

[0087] The display panel DP in the embodiments of the invention can be a light-emitting display panel. In embodiments, for example, the display panel DP can be an organic light-emitting display panel or a quantum dot light-emitting display panel. An organic light-emitting display panel may include a light-emitting layer comprising organic light-emitting materials. A quantum dot light-emitting display panel may include a light-emitting layer comprising quantum dots or quantum rods. Hereinafter, the display panel DP will be described as an organic light-emitting display panel.

[0088] The display panel DP can be a flexible display panel. Similar to the display module DM, the display panel DP may include a first non-folded region NFA1, a folded region FA, and a second non-folded region NFA2 arranged along the second direction DR2. Furthermore, similar to the display module DM, the folded region FA of the display panel DP may include a curved portion CSP, a first extended portion EX1, and a second extended portion EX2. The display panel DP may include multiple pixels for displaying images. Pixels may include organic light-emitting devices.

[0089] The anti-reflective layer RPL can be disposed on the display panel DP. The anti-reflective layer RPL can be disposed directly on the top surface of the display panel DP. However, the invention is not limited thereto. In embodiments, for example, the anti-reflective layer RPL can be manufactured as a separate panel and attached to the display panel DP by an adhesive.

[0090] An anti-reflective layer (RPL) can be defined as an external light reflection prevention film. The RPL reduces the reflectivity of external light incident on the display panel (DP) from above the display device (DD).

[0091] When external light traveling toward the display panel (DP) is reflected by the display panel (DP) and then returned to the external user, the user perceives the external light as if it were a mirror. To prevent this phenomenon, the anti-reflective layer (RPL) may include multiple color filters that display the same colors as the pixels.

[0092] A color filter can filter external light into the same color as a pixel. In this case, the external light may not be recognized by the user. However, the invention is not limited to this. In embodiments, for example, the anti-reflective layer RPL may include a phase retarder and / or a polarizer.

[0093] The window (WIN) can be disposed on the anti-reflective layer (RPL). The window (WIN) can protect the display panel (DP) and the anti-reflective layer (RPL) from external scratches. The window (WIN) can have optically transparent properties. The window (WIN) can include glass. In embodiments, for example, the window (WIN) can be defined as ultra-thin glass (“UTG”). However, the invention is not limited thereto. In embodiments, for example, the window (WIN) can include a synthetic resin film.

[0094] A window protective layer WP can be disposed on a window WIN. The window protective layer WP can protect the window WIN. In embodiments, for example, the window protective layer WP may comprise a flexible plastic material such as polyimide (“PI”) or polyethylene terephthalate (“PET”). Although not shown, a hard coating may also be disposed on the window protective layer WP. In addition, an anti-fingerprint layer or an anti-scattering layer defined as a functional layer may also be disposed on the window protective layer WP.

[0095] A panel protective layer (PPL) can be disposed below the display panel (DP). The PPL protects the lower portion of the display panel (DP). The PPL may comprise a flexible plastic material. In an embodiment, for example, the PPL may comprise PET.

[0096] A support plate SPT can be disposed beneath the panel protective layer PPL. The support plate SPT can comprise a metallic material such as stainless steel. Although, by way of example, the support plate SPT can comprise STS316, the invention is not limited thereto. In embodiments, for example, the support plate SPT can comprise various metallic materials.

[0097] The support plate SPT can support the display panel DP. In an embodiment, for example, the support plate SPT can have a thickness of about 40 micrometers (μm) or less. The heat dissipation performance of the display device DD can be improved by the support plate SPT.

[0098] The support plate SPT may include a first support plate SPT1 disposed in the first non-folding region NFA1 and a second support plate SPT2 disposed in the second non-folding region NFA2. The support plate SPT may not be disposed in the folding region FA.

[0099] A cushioning layer CUL can be disposed below the support plate SPT. The cushioning layer CUL can absorb external impacts applied to the lower part of the display module DM to protect the display module DM. The cushioning layer CUL may include a foam sheet with a predetermined elasticity. In embodiments, for example, the cushioning layer CUL may include foam, sponge, or polyurethane (e.g., thermoplastic polyurethane).

[0100] The buffer layer CUL may include a first buffer layer CUL1 disposed below the first support plate SPT1 and a second buffer layer CUL2 disposed below the second support plate SPT2. The buffer layer CUL may not be disposed in the folding area FA.

[0101] A coating BCT can be disposed between the panel protective layer PPL and the support plate SPT. The coating BCT can be applied to the top surface of the first support plate SPT1 and the top surface of the second support plate SPT2. The coating BCT may include a material with a black color. The coating BCT prevents structures disposed beneath the coating BCT from being identified from above the coating BCT.

[0102] The display device DD may include a first adhesive layer AL1 to a fourth adhesive layer AL4. The first adhesive layer AL1 may be disposed between the window protective layer WP and the window WIN. The second adhesive layer AL2 may be disposed between the window WIN and the anti-reflective layer RPL.

[0103] The third adhesive layer AL3 can be disposed between the display panel DP and the panel protective layer PPL. The fourth adhesive layer AL4 can be disposed between the panel protective layer PPL and the support plate SPT. Specifically, the fourth adhesive layer AL4 can be disposed between the panel protective layer PPL and the coating BCT.

[0104] In an embodiment, each of the first adhesive layer AL1 to the fourth adhesive layer AL4 may include a transparent adhesive such as a pressure-sensitive adhesive (“PSA”) or an optically clear adhesive (“OCA”).

[0105] The window protective layer WP and the window WIN can be bonded together through the first adhesive layer AL1. The window WIN and the anti-reflective layer RPL can be bonded together through the second adhesive layer AL2.

[0106] The display panel (DP) and the panel protective layer (PPL) can be bonded together via a third adhesive layer (AL3). The panel protective layer (PPL) and the support plate (SPT) can be bonded together via a fourth adhesive layer (AL4). Specifically, the panel protective layer (PPL) can be bonded to the coating (BCT) via the fourth adhesive layer (AL4).

[0107] The printed layer PIT can be disposed on the bottom surface of the window protective layer WP. The printed layer PIT can be superimposed on the non-display area NDA in a plan view. The first adhesive layer AL1 can be disposed under the window protective layer WP to cover the printed layer PIT. Although, by way of example, the printed layer PIT can be black, the invention is not limited thereto. In embodiments, for example, the printed layer PIT can be various colors.

[0108] When viewed in a plan view, the fourth adhesive layer AL4 can be superimposed on the first non-folded region NFA1 and the second non-folded region NFA2. Furthermore, in the plan view, the fourth adhesive layer AL4 can be superimposed on the first extended portion EX1 and the second extended portion EX2, but not on the curved portion CSP. Therefore, the first support plate SPT1 and the second support plate SPT2 can be attached to the first non-folded region NFA1 and the second non-folded region NFA2, as well as the first extended portion EX1 and the second extended portion EX2, but not to the curved portion CSP.

[0109] In an embodiment, for example, with respect to the third-direction DR3, the window WIN may have a thickness greater than about 30 μm and less than about 80 μm, and the window protective layer WP may have a thickness in the range of about 55 μm to about 100 μm. In an embodiment, with respect to the third-direction DR3, the support plate SPT may have a thickness in the range of about 80 μm to about 150 μm.

[0110] Regarding the first direction DR1 and the second direction DR2, the window protective layer WP can have a width greater than the width of the window WIN. Regarding the first direction DR1 and the second direction DR2, each of the display panel DP, the anti-reflective layer RPL, and the panel protective layer PPL can have a width greater than the width of the window protective layer WP.

[0111] Regarding the first direction DR1 and the second direction DR2, the display panel DP, the anti-reflective layer RPL, and the panel protective layer PPL can have the same width as each other. Regarding the first direction DR1 and the second direction DR2, the first adhesive layer AL1 can have the same width as the window protective layer WP, and the second adhesive layer AL2 can have a width smaller than the window WIN.

[0112] Because the window WIN and the second adhesive layer AL2 have different widths, a stepped structure is provided between the window protective layer WP and the display panel DP due to the difference in width between the window WIN and the second adhesive layer AL2. The window protective layer WP can have a thickness sufficient to prevent the stepped structure from being identified from the outside. In embodiments, for example, when the window protective layer WP has a thickness in the range of about 55 μm to about 100 μm, the stepped structure is not identified from the outside.

[0113] When viewed in a plan view, the first support plate SPT1 and the second support plate SPT2, as well as the first buffer layer CUL1 and the second buffer layer CUL2, can be positioned on the inner side relative to the edge of the display panel DP.

[0114] Figure 5 It is shown Figure 4 A cross-sectional view of the display panel.

[0115] Reference Figure 5 The display panel DP may include a substrate SUB, a circuit device layer DP-CL disposed on the substrate SUB, a display device layer DP-OLED disposed on the circuit device layer DP-CL, a thin film encapsulation layer TFE disposed on the display device layer DP-OLED, and an input sensing portion ISP disposed on the thin film encapsulation layer TFE.

[0116] The substrate SUB may include a display area DA and a non-display area NDA disposed around the display area DA. The substrate SUB may include a flexible plastic material. In an embodiment, the substrate SUB may include PI. For example, a display device layer DP-OLED may be disposed on the display area DA.

[0117] The circuit device layer DP-CL can include an insulating layer, semiconductor patterns, conductive patterns, and signal lines. Each of the insulating layer, semiconductor layer, and conductive layer can be formed on a substrate SUB by methods such as coating and deposition. Subsequently, the insulating layer, semiconductor layer, and conductive layer can be selectively patterned using multiple photolithography processes to provide semiconductor patterns, conductive patterns, and signal lines.

[0118] The circuit device layer DP-CL may include transistors composed of semiconductor patterns, conductive patterns, and signal lines. The display device layer DP-OLED may include light-emitting devices connected to the transistors. The pixel PX may include transistors and light-emitting devices.

[0119] A thin-film encapsulation layer (TFE) can be disposed on the circuit device layer (DP-CL) to cover the display device layer (DP-OLED). The TFE can include inorganic layers, organic layers, and inorganic layers stacked sequentially on top of each other. The inorganic layers can include inorganic materials to protect the pixel (PX) from moisture / oxygen. The organic layers can include organic materials to protect the pixel (PX) from foreign matter such as dust particles.

[0120] The input sensing section (ISP) may include multiple sensors (not shown) for sensing external inputs. These sensors may sense external inputs using capacitive methods. External inputs may include various types of inputs such as a part of the user's body, light, heat, a pen, or pressure.

[0121] When manufacturing the display panel (DP), the input sensing portion (ISP) can be directly fabricated on the thin-film encapsulation layer (TFE). However, the invention is not limited thereto. In embodiments, for example, the input sensing portion (ISP) can be fabricated as a panel separate from the display panel (DP) and then attached to the display panel (DP) via an adhesive layer.

[0122] Figure 6 To show in more detail Figure 1 A plan view of the display device. Figure 7 It is shown Figure 6 An exploded perspective view of the display device.

[0123] Reference Figure 6 and Figure 7 The display device DD may include a display module DM, a bezel cover BZC disposed around the display module DM, and a folding kit FST disposed below the display module DM and the bezel cover BZC.

[0124] The bezel cover BZC can be disposed around the first non-folding area NFA1 and the second non-folding area NFA2 of the display module DM. The bezel cover BZC can surround the first non-folding area NFA1 and the second non-folding area NFA2 of the display module DM. Although the bezel cover BZC can be black, the invention is not limited to this color. Figure 1 The edge portion EG of the display device DD may include a bezel cover BZC.

[0125] The folding kit FST can be positioned below the display module DM and the bezel cover BZC to support them. The folding kit FST can be folded parallel to the first direction DR1 and relative to the dual-axis folding axis that overlaps with the folding area FA in the plan view, thereby folding the display module DM. The above construction will be described in detail below.

[0126] Despite Figure 7 Not shown, but the display module DM and the bezel cover BZC can be attached to the folding kit FST with adhesive.

[0127] Figure 8 It is shown Figure 7 A floor plan of the folding kit.

[0128] Reference Figure 8The folding kit FST may include a first body BD1, a second body BD2, a hinge module HGM, a first wing plate WPT1, and a second wing plate WPT2. The first body BD1 and the second body BD2 may be arranged along a second direction DR2. Each of the first body BD1 and the second body BD2 may have a flat surface defined by the first direction DR1 and the second direction DR2. The first body BD1 and the second body BD2 may have shapes that are symmetrical to each other in the second direction DR2.

[0129] A hinge module HGM can be disposed between a first body BD1 and a second body BD2. The hinge module HGM can connect to the two opposite sides of the first body BD1 in the first direction DR1 and the two opposite sides of the second body BD2 in the first direction DR1. The hinge module HGM can connect to the first body BD1 and the second body BD2, and provides dual-axis rotation axes RX1 and RX2 to the first body BD1 and the second body BD2 respectively.

[0130] The dual-axis rotation axes RX1 and RX2 may both extend along a first direction DR1 and be spaced apart from each other along a second direction DR2. The dual-axis rotation axes RX1 and RX2 may include a first rotation axis RX1 and a second rotation axis RX2, which are spaced apart from each other along the second direction DR2 and extend along the first direction DR1. The first rotation axis RX1 and the second rotation axis RX2 may define... Figure 2 The folded axis FX in the middle.

[0131] The first wing plate WPT1 and the second wing plate WPT2 can be arranged along the second direction DR2 and extend along the first direction DR1. The first wing plate WPT1 and the second wing plate WPT2 can have shapes that are symmetrical to each other in the second direction DR2.

[0132] Each of the first wing plate WPT1 and the second wing plate WPT2 may have a flat surface defined by a first direction DR1 and a second direction DR2. The first wing plate WPT1 may be configured to be adjacent to the hinge module HGM and connected to the first body BD1. The second wing plate WPT2 may be configured to be adjacent to the hinge module HGM and connected to the second body BD2.

[0133] Figure 9 It is shown Figure 8 An exploded perspective view of the folding kit in the image.

[0134] Reference Figure 9The top surface of the first body BD1 adjacent to the first side OS1 of the first body BD1 may have a first inclined surface SLP1. The first inclined surface SLP1 may have a height that gradually decreases in the direction toward the first side OS1 of the first body BD1. The first inclined surface SLP1 may be stepped with the top surface of the first body BD1 around the first inclined surface SLP1.

[0135] The top surface of the second body BD2 adjacent to the first side OS2 of the second body BD2 may have a second inclined surface SLP2. The first side OS2 of the second body BD2 may face the first side OS1 of the first body BD1. The second inclined surface SLP2 may have a height that gradually decreases in the direction toward the first side OS2 of the second body BD2. The second inclined surface SLP2 may be stepped with the top surface of the second body BD2 around the second inclined surface SLP2.

[0136] A first wing plate WPT1 may be disposed on and attached to a first body BD1. The first wing plate WPT1 may be disposed on a first inclined surface SLP1. The first wing plate WPT1 may be rotatably attached to a portion of the first body BD1 adjacent to a first side OS1 of the first body BD1. In an embodiment, for example, the first wing plate WPT1 may be rotatably attached to the uppermost side of the first inclined surface SLP1 furthest from the first side OS1 of the first body BD1.

[0137] A plurality of first rotating surfaces RTS1 may be defined above a first inclined surface SLP1. The upper side of the first inclined surface SLP1 may be defined as a first boundary BA1 between the first inclined surface SLP1 and the top surface of the first body BD1 around the first inclined surface SLP1. Each of the first rotating surfaces RTS1 may have a concave shape and be defined within the first body BD1. The first rotating surfaces RTS1 may be arranged along the upper side of the first inclined surface SLP1 in a first direction DR1.

[0138] The first wing plate WPT1 may include a plurality of first connecting portions CUP1 protruding from a second side of the first wing plate WPT1, the second side of the first wing plate WPT1 being opposite to the first side of the first wing plate WPT1 facing the second wing plate WPT2. The first connecting portions CUP1 may be arranged along a first direction DR1. The first connecting portions CUP1 may be respectively disposed on a first rotating surface RTS1.

[0139] The first wingplate WPT1 is rotatable relative to the wing rotation axis, which is adjacent to a second side of the first wingplate WPT1 and parallel to the first direction DR1. In an embodiment, for example, the first coupling portion CUP1 can be coupled to the first rotating surface RTS1 and rotate relative to the wing rotation axis. The following will... Figure 30 and Figure 31 The wing rotation axis is shown in the diagram.

[0140] The second wing plate WPT2 can be disposed on and attached to the second body BD2. The second wing plate WPT2 can be disposed on the second inclined surface SLP2. The second wing plate WPT2 can be rotatably attached to the portion of the second body BD2 adjacent to the first side OS2 of the second body BD2. In an embodiment, for example, the second wing plate WPT2 can be rotatably attached to the uppermost side of the second inclined surface SLP2 furthest from the first side OS2 of the second body BD2.

[0141] A plurality of second rotating surfaces RTS2 may be defined above the second inclined surface SLP2. The upper side of the second inclined surface SLP2 may be defined as a second boundary BA2 between the second inclined surface SLP2 and the top surface of the second body BD2 around the second inclined surface SLP2. Each of the second rotating surfaces RTS2 may have a concave shape and be defined within the second body BD2. The second rotating surfaces RTS2 may be arranged along the upper side of the second inclined surface SLP2 in a first direction DR1.

[0142] The second wing plate WPT2 may include a plurality of second connecting portions CUP2 protruding from a second side of the second wing plate WPT2, the second side of the second wing plate WPT2 being opposite to the first side of the second wing plate WPT1. The second connecting portions CUP2 may be arranged along a first direction DR1. The second connecting portions CUP2 may be respectively disposed on the second rotating surface RTS2.

[0143] The second wing plate WPT2 can rotate relative to the wing rotation axis, which is adjacent to the second side of the second wing plate WPT2 and parallel to the first direction DR1. In an embodiment, for example, the second coupling portion CUP2 can be coupled to the second rotating surface RTS2 and rotate relative to the wing rotation axis.

[0144] The hinge module HGM may include a first hinge HIG1, a second hinge HIG2, a center frame CFM, and a hinge cover HGC. The first hinge HIG1 and the second hinge HIG2 may be arranged along a first direction DR1. The first hinge HIG1 and the second hinge HIG2 may have symmetrical shapes relative to each other in the first direction DR1. The first hinge HIG1 and the second hinge HIG2 may be connected to a first body BD1 and a second body BD2, and provide a first rotation axis RX1 and a second rotation axis RX2 to the first body BD1 and the second body BD2.

[0145] The first hinge HIG1 can be disposed between the first body BD1 and the second body BD2. The first hinge HIG1 can be connected to the first side of the first body BD1 and the second body BD2, which are opposite to each other along the first direction DR1.

[0146] The second hinge HIG2 can be disposed between the first body BD1 and the second body BD2. The second hinge HIG2 can be connected to the second side of the first body BD1 and the second body BD2, which are opposite to each other along the first direction DR1.

[0147] A plurality of first holes H1 may be defined in each of the first hinge HIG1 and the second hinge HIG2. A plurality of first fastening slots CG1 may be defined in each of the first body BD1 and the second body BD2. When a plurality of screws (not shown) pass through the first holes H1 and are inserted into the first fastening slots CG1, the first hinges HIG1 and the second hinges HIG2 may be connected to the first body BD1 and the second body BD2.

[0148] The central frame CFM can extend along the first direction DR1 and be disposed between the first hinge HIG1 and the second hinge HIG2. The central frame CFM can be disposed between the first main body BD1 and the second main body BD2. The central frame CFM can be disposed between the first winglet WPT1 and the second winglet WPT2.

[0149] The hinge cover HGC can be located below the first hinge HIG1, the second hinge HIG2, and the center frame CFM. The first hinge HIG1, the second hinge HIG2, and the center frame CFM can be connected to the hinge cover HGC.

[0150] In an embodiment, for example, a plurality of second holes H2 may be defined in each of the first hinge HIG1, the second hinge HIG2, and the center frame CFM. A plurality of second fastening slots CG2 may be defined in the hinge cover HGC. When a plurality of screws (not shown) pass through the second holes H2 and are inserted into the second fastening slots CG2, the first hinge HIG1, the second hinge HIG2, and the center frame CFM may be connected to the hinge cover HGC.

[0151] The first slot GV1 can be defined in the upper part of the two opposing sides of the central frame CFM in the second direction DR2. Each of the first slots GV1 can extend along the first direction DR1. When the hinge module HGM is connected to the first body BD1 and the second body BD2, the first side of the first wing plate WPT1 and the first side of the second wing plate WPT2 can be respectively disposed in the first slot GV1.

[0152] Figure 10 It is shown Figure 9 Exploded perspective view of the first hinge in the structure. Figure 11 It shows when viewed from the first direction Figure 10 The first frame in the image is the front view of the first frame. Figure 12 It is shown Figure 10 The internal transparent perspective view of the second frame in the image.

[0153] In the following text, since the second hinge HIG2 has the same construction as the first hinge HIG1, the construction of the first hinge HIG1 will be described in detail, and the construction of the second hinge HIG2 will be omitted. They will be described together as needed in the following text. Figure 9 .

[0154] Reference Figure 9 and Figure 10 The first hinge HIG1 may include multiple support bodies BBD1 and BBD2, multiple rotary pin units RPN1 and RPN2, multiple support cams BCM1 and BCM2, a first frame FM1, multiple gears GR1 and GR2, multiple cams CAM1 and CAM2, multiple springs SPR1 and SPR2, a second frame FM2, and multiple ring units RG. Gears GR1, cams CAM1 and CAM2, and springs SPR1 and SPR2 in gears GR1 and GR2 can be defined as the torque control section (TQC).

[0155] Support bodies BBD1 and BBD2 can be connected to the first body BD1 and the second body BD2, as well as the rotating pin units RPN1 and RPN2. The rotating pin units RPN1 and RPN2 can be connected to the first body BD1 and the second body BD2 via the support bodies BBD1 and BBD2.

[0156] The support bodies BBD1 and BBD2 may include a first support body BBD1 connected to a first body BD1 and a second support body BBD2 connected to a second body BD2. The first support body BBD1 and the second support body BBD2 may be arranged along a second direction DR2 and have shapes symmetrical to each other in the second direction DR2. A first hole H1 may be defined in each of the first support body BBD1 and the second support body BBD2.

[0157] Rotary pin units RPN1 and RPN2 may include a first rotary pin unit RPN1 connected to a first support body BBD1 and a second rotary pin unit RPN2 connected to a second support body BBD2. The first rotary pin unit RPN1 and the second rotary pin unit RPN2 may be spaced apart from each other in a second direction DR2 and both extend along a first direction DR1. The first rotary pin unit RPN1 and the second rotary pin unit RPN2 may respectively define a first rotation axis RX1 and a second rotation axis RX2.

[0158] The first rotating pin unit RPN1 and the second rotating pin unit RPN2 can be connected to a first side of the first support body BBD1 and the first side of the second support body BBD2, respectively, with the first sides of the first support body BBD1 and the first sides of the second support body BBD2 facing each other in the second direction DR2. The first rotating pin unit RPN1 and the second rotating pin unit RPN2 can be manufactured separately and connected to the first support body BBD1 and the second support body BBD2, respectively. However, the invention is not limited thereto. In embodiments, for example, the first rotating pin unit RPN1 and the second rotating pin unit RPN2 can be integrally formed with the first support body BBD1 and the second support body BBD2, respectively, and extend from the first support body BBD1 and the second support body BBD2, respectively.

[0159] The first frame FM1, the second frame FM2, and the central frame CFM can be arranged along the first direction DR1. The second frame FM2 can be located between the first frame FM1 and the central frame CFM. The first frame FM1 can be located between the first support body BBD1, the second support body BBD2, and the second frame FM2.

[0160] Reference Figure 10 and Figure 11 The first rotating pin unit RPN1 and the second rotating pin unit RPN2 can be inserted into and connected to the first frame FM1. In an embodiment, for example, a third hole H3, both extending along the first direction DR1, can be defined in the portion of the first frame FM1 adjacent to the upper side of the first frame FM1. The first rotating pin unit RPN1 and the second rotating pin unit RPN2 can be respectively inserted into the third hole H3 and connected to the first frame FM1.

[0161] Each of gears GR1 and GR2 may extend along a first direction DR1. Gears GR1 and GR2 may include a plurality of first gears GR1 and a plurality of second gears GR2. Although two first gears GR1 and two second gears GR2 are shown, the invention is not limited to the number of each of the first gears GR1 and the second gears GR2. The first gears GR1 may all extend along the first direction DR1 and mesh with each other to rotate in the second direction DR2.

[0162] The second gears GR2 can extend along the first direction DR1 and be spaced apart from each other in the second direction DR2. The first gear GR1 can be disposed between the second gears GR2. The second gears GR2 can mesh with the first gear GR1 to rotate in the second direction DR2. The first gear GR1 and the second gear GR2 can be positioned relative to a gear rotation axis parallel to the first direction DR1 (in... Figure 10 (Not shown in the image) Rotation.

[0163] The first gear GR1 may include a plurality of first protrusions PT1 disposed on the outer peripheral surface of the first gear GR1 to define the shape of the gear, the outer peripheral surface being adjacent to a first side of the first gear GR1, which is opposite to each other on a first side and a second side along a first direction DR1. When the first protrusions PT1 of the first gear GR1 move while meshing with each other, the first gear GR1 can rotate together.

[0164] The second side of the second gear GR2, which is opposite to a first side along the first direction DR1, may be adjacent to the first side of the first gear GR1. The second gear GR2 may include a plurality of second protrusions PT2 disposed on its outer peripheral surface to define the shape of the gear, the outer peripheral surface being adjacent to the second side of the two sides of the second gear GR2. When the second protrusions PT2 move while meshing with the first protrusions PT1, the second gear GR2 may rotate together with the first gear GR1.

[0165] When the first gear GR1 is inserted into cams CAM1 and CAM2 and springs SPR1 and SPR2, cams CAM1 and CAM2 and springs SPR1 and SPR2 can be positioned on the first gear GR1. A second side of the first gear GR1 can be inserted into cams CAM1 and CAM2 and springs SPR1 and SPR2. Cams CAM1 and CAM2 and springs SPR1 and SPR2 can be positioned between the first protrusion PT1 and the second side of the first gear GR1.

[0166] The first gear GR1 and the second gear GR2 may have a first side facing the first frame FM1 and a second side facing the second frame FM2. The first gear GR1 and the second gear GR2 may have a first side inserted into the first frame FM1 and a second side inserted into the second frame FM2.

[0167] A plurality of fourth holes H4 and a plurality of fifth holes H5, all extending along the first direction DR1, can be defined in the portion of the first frame FM1 adjacent to the lower side of the first frame FM1. The fourth holes H4 and fifth holes H5 can be defined below the third hole H3. The fourth hole H4 can be defined corresponding to the first gear GR1. The fifth hole H5 can be defined corresponding to the second gear GR2.

[0168] When the first side of the first gear GR1 is inserted into the fourth hole H4, the first gear GR1 can be engaged with the first frame FM1. When the first side of the second gear GR2 is inserted into the fifth hole H5, the second gear GR2 can be engaged with the first frame FM1.

[0169] The portion of the first frame FM1 between the third hole H3 and the fourth hole H4 can be defined as a flat portion PP and has a flat plate shape defined by the first direction DR1 and the second direction DR2.

[0170] The mounting groove SGV can be defined in the upper part of the two sides of the second frame FM2 facing each other in the first direction DR1. The end of the flat part PP can be provided in the mounting groove SGV of the second frame FM2 facing the first frame FM1. The upper part of the first side of the center frame CFM can be provided in the mounting groove SGV of the second frame FM2 facing the center frame CFM.

[0171] Reference Figure 10 and Figure 12 An internal space SPC and multiple insertion slots IGV can be defined within a second frame FM2. The internal space SPC can be defined to correspond to a first gear GR1. The insertion slots IGV can be defined to correspond to a second gear GR2. A second side of the first gear GR1 can be inserted into the internal space SPC. A second side of the second gear GR2 can be inserted into the insertion slots IGV respectively.

[0172] Two holes (not shown in the figures) may be defined at the ends of the internal space SPC, and the second side of the first gear GR1 may be respectively disposed in the two holes. The first cam CAM1 and the second cam CAM2, as well as the first spring SPR1 and the second spring SPR2, may be disposed in the internal space SPC to be disposed in the second frame FM2.

[0173] Reference Figure 10 The support cams BCM1 and BCM2 may include a first support cam BCM1 coupled to a first support body BBD1 and a second support cam BCM2 coupled to a second support body BBD2. The first support cam BCM1 and the second support cam BCM2 may be arranged along a second direction DR2 and have shapes that are symmetrical to each other in the second direction DR2.

[0174] The groove GV can be defined on opposite sides of the first frame FM1 in the second direction DR2. The first support cam BCM1 and the second support cam BCM2 can be disposed in the groove GV. The first sides of the first support cam BCM1 and the second support cam BCM2 facing each other in the second direction DR2 can be disposed in the groove GV.

[0175] The first side of the second gear GR2 can be inserted into the first side of the first support cam BCM1 and the first side of the second support cam BCM2. Therefore, the first sides of the first support cam BCM1 and the second support cam BCM2 can engage with the second gear GR2. When the first side of the second gear GR2 is inserted into the hole H defined at the first side of the first support cam BCM1 and the second support cam BCM2, the first support cam BCM1 and the second support cam BCM2 can engage with the second gear GR2.

[0176] The second side of the first support cam BCM1 and the second support cam BCM2 may protrude in the first direction DR1 and be disposed in the guide groove GG defined in the first support body BBD1 and the second support body BBD2. The ring unit RG may be disposed at the second side of the first support cam BCM1 and the second support cam BCM2 that protrudes in the first direction DR1.

[0177] The guide groove GG can be defined in a first surface of the first support body BBD1 and the second support body BBD2 facing the first support cam BCM1 and the second support cam BCM2. The guide groove GG can extend along the second direction DR2.

[0178] When the first rotary pin unit RPN1 and the second rotary pin unit RPN2 rotate, the first support cam BCM1 and the second support cam BCM2 can rotate together with the second gear GR2 to move along the guide groove GG. This operation will be described in detail below.

[0179] The second slot GV2 can be defined in the upper part of the two opposing sides of the second frame FM2 in the second direction DR2. The second slot GV2 can extend along the first direction DR1. When the hinge module HGM is connected to the first body BD1 and the second body BD2, the first side of the first wing plate WPT1 and the first side of the second wing plate WPT2 facing each other can be disposed in the second slot GV2.

[0180] Figure 13 It is shown Figure 10 An exploded perspective view of the torque control section.

[0181] In the following text, they will be described together as needed. Figure 10 .

[0182] Reference Figure 10 and Figure 13 The torque control section (TQC) may include multiple first gears GR1, multiple cams CAM1 and CAM2, and multiple springs SPR1 and SPR2. Cams CAM1 and CAM2 may include a first cam CAM1 and a second cam CAM2 spaced apart from each other in a first direction DR1.

[0183] The first cam CAM1 may include a first moving cam MVC1 and a first rotating cam RCM1. The second cam CAM2 may include a second moving cam MVC2 and a second rotating cam RCM2. Springs SPR1 and SPR2 may include a first spring SPR1 and a second spring SPR2, each of the first spring SPR1 and the second spring SPR2 extending along a first direction DR1.

[0184] A first gear GR1 can be inserted into a first movable cam MVC1 and a second movable cam MVC2. The first gear GR1 can also be inserted into each of the first movable cams MVC1 and MVC2. The first gear GR1 can be inserted into a hole (not shown in the figures) passing through each of the first movable cams MVC1 and MVC2 in a first direction DR1. When a second side of the first gear GR1 passes through the hole defined in the first movable cams MVC1 and MVC2, the first movable cams MVC1 and MVC2 can be positioned on the outer peripheral surface of a portion of the first gear GR1.

[0185] The first gear GR1 can be inserted into the first rotary cam RCM1 and the second rotary cam RCM2. The first gear GR1 can be inserted into the first rotary cam RCM1 and the second rotary cam RCM2 respectively, so that the first gear GR1 corresponds one-to-one with the first rotary cam RCM1 and the second rotary cam RCM2.

[0186] The corresponding first gear GR1 in the first gear GR1 can be inserted into a hole (not shown in the figure) that passes through one of the corresponding first rotary cams RCM1 and second rotary cams RCM2 in the first direction DR1. When the second side of the first gear GR1 passes through the hole defined in the first rotary cam RCM1 and second rotary cam RCM2, the first rotary cam RCM1 and second rotary cam RCM2 can be disposed on the outer peripheral surface of a portion of the first gear GR1.

[0187] The first gear GR1 can be inserted into the first spring SPR1 and the second spring SPR2. The first gear GR1 can be inserted into the first spring SPR1 and the second spring SPR2 respectively, so that the first gear GR1 corresponds one-to-one with the first spring SPR1 and the second spring SPR2.

[0188] One of the first moving cams MVC1 and MVC2 can be disposed between a corresponding pair of rotating cams and springs, namely the first rotating cam RCM1, the second rotating cam RCM2, the first spring SPR1, and the second spring SPR2. The corresponding pair of rotating cams and springs can be disposed on the same first gear GR1. Therefore, each of the first moving cams MVC1 and MVC2 can be disposed between a corresponding pair of rotating cams and springs disposed on the first gear GR1.

[0189] The first moving cam MVC1 can be disposed between the first rotating cam RCM1 and the first spring SPR1, and the first rotating cam RCM1 and the first spring SPR1 are disposed on a first gear GR1. The second moving cam MVC2 can be disposed between the second rotating cam RCM2 and the second spring SPR2, and the second rotating cam RCM2 and the second spring SPR2 are disposed on another first gear GR1.

[0190] A surface of a movable cam and a surface of a rotary cam, both mounted on the same first gear GR1 and facing each other, may include protrusions. The protrusions of the movable cam's surface and the rotary cam's surface may be alternately arranged.

[0191] In an embodiment, for example, a surface of a first moving cam MVC1 and a surface of a first rotating cam RCM1 disposed on a first gear GR1 and facing each other may include a protrusion (in Figure 13 (No reference numerals are provided in the accompanying drawings). The protrusions of one surface of the first moving cam MVC1 and the protrusions of one surface of the first rotating cam RCM1 can be alternately arranged.

[0192] A surface of a second moving cam MVC2 and a second rotating cam RCM2, which are mounted on another first gear GR1 and face each other, may include a protrusion (in... Figure 13 (No reference numerals are provided in the accompanying drawings). The protrusions of one surface of the second moving cam MVC2 and the protrusions of one surface of the second rotating cam RCM2 can be alternately arranged.

[0193] Figure 14 It is shown that Figure 9 and Figure 10 A view showing the state of the first hinge connecting to the first and second bodies. Figure 15 It shows the setting Figure 14 The view of the components in the first and second frames.

[0194] exist Figure 15 The first frame FM1 and the second frame FM2 are omitted in the text. They will be described together as needed in the following text. Figure 10 .

[0195] Reference Figure 10 , Figure 14 and Figure 15 The first support body BBD1 and the second support body BBD2 can be connected to the first body BD1 and the second body BD2 by screws inserted into the first hole H1.

[0196] The first rotary pin unit RPN1 and the second rotary pin unit RPN2 can be inserted into and rotatably coupled to the first frame FM1. The first rotary pin unit RPN1 can define a first rotation axis RX1, and the second rotary pin unit RPN2 can define a second rotation axis RX2.

[0197] The first support cam BCM1 and the second support cam BCM2 can be respectively coupled to the first support body BBD1 and the second support body BBD2. Since the first support cam BCM1 and the second support cam BCM2 can be mounted on the first frame FM1, and the second gear GR2 is inserted into the first support cam BCM1 and the second support cam BCM2, the first support cam BCM1 and the second support cam BCM2 can be coupled to the second gear GR2 to rotate together with the second gear GR2.

[0198] The end of the flat portion PP is disposed in the mounting groove SGV defined on the first side of the second frame FM2, and the first frame FM1 and the second frame FM2 can be connected to each other by fastening units (not shown) such as screws.

[0199] The first gear GR1 and the second gear GR2 can be inserted into and engaged with the first frame FM1 and the second frame FM2. The first protrusion PT1 and the second protrusion PT2 can mesh with each other and engage to rotate relative to each other.

[0200] The first moving cam MVC1 and the second moving cam MVC2, the first rotating cam RCM1 and the second rotating cam RCM2, and the first spring SPR1 and the second spring SPR2 can be coupled to the first gear GR1 and disposed in the second frame FM2. The first rotating cam RCM1 and the second rotating cam RCM2 can be coupled to the first gear GR1 to rotate together with the first gear GR1.

[0201] The first side of the first wing plate WPT1 and the first side of the second wing plate WPT2 can be disposed in the first groove GV1 and the second groove GV2. The first connecting portion CUP1 of the first wing plate WPT1 and the second connecting portion CUP2 of the second wing plate WPT2 can be rotatably connected to the first rotating surface RTS1 and the second rotating surface RTS2 defined in the first body BD1 and the second body BD2, respectively.

[0202] Figure 16A and Figure 16B It is used for explanation Figure 15 A view of the operation of the first rotary cam and the first movable cam.

[0203] Although the operation of the first rotary cam RCM1 and the first translating cam MVC1 will be described, the operation of the second rotary cam RCM2 and the second translating cam MVC2 may be the same as that of the first rotary cam RCM1 and the first translating cam MVC1.

[0204] Reference Figure 16A The first protrusion PRT1 of the first rotary cam RCM1 can be disposed between the second protrusion PRT2 of the first movable cam MVC1. The state in which the first protrusion PRT1 is disposed between the second protrusion PRT2 can be maintained by the elastic force applied by the first spring SPR1. In an embodiment, for example, in... Figure 16A In this configuration, the display device can be in an unfolded state. Since the first protrusion PRT1 is maintained between the second protrusion PRT2, it is easier to maintain the unfolded state of the display device DD.

[0205] Reference Figure 16B The display device DD can be folded by an external force (e.g., the force of a user). When the first rotary cam RCM1 is rotated by an external force, the first protrusion PRT1 can move counterclockwise past the protruding top surface of the second protrusion PRT2. When the force of the user is greater than the force used to maintain the state in which the first protrusion PRT1 is positioned between the second protrusion PRT2, the first protrusion PRT1 can move past the top surface of the second protrusion PRT2, and the display device DD can be folded.

[0206] Through the above operations, when the display device DD is unfolded, the unfolded state is easily maintained, and when the user wants to fold the display device DD, the display device DD can be folded by applying a predetermined force to the display device DD. For the above operations, the torque control section TQC, including the first cam CAM1 and the second cam CAM2, can be set to the hinge module HGM.

[0207] Figure 17A It is shown Figure 8A view of the unfolded state of the folded kit. Figure 17B It is shown Figure 17A A view of the folded state of the folded kit.

[0208] Reference Figure 17A and Figure 17B The folding kit FST can be folded by rotating relative to a first rotation axis RX1 and a second rotation axis RX2, which are respectively defined by a first rotation pin unit RPN1 and a second rotation pin unit RPN2. When the folding kit FST is folded, the display module DM disposed on the folding kit FST can also be folded.

[0209] Figure 18A It is along Figure 14 A sectional view taken by line I-I'. Figure 18B and Figure 18C It is used for explanation Figure 18A A view of the folded state of the folded kit.

[0210] In the following text, they will be described together as needed. Figure 14 .

[0211] Reference Figure 14 , Figure 18A , Figure 18B and Figure 18C The folding kit FST can be folded by rotating relative to a first rotation axis RX1 and a second rotation axis RX2, which are respectively defined by a first rotation pin unit RPN1 and a second rotation pin unit RPN2. When the first rotation pin unit RPN1 and the second rotation pin unit RPN2 rotate, the first support body BBD1 and the second support body BBD2 can be moved by rotating relative to the first rotation axis RX1 and the second rotation axis RX2.

[0212] When the first support body BBD1 and the second support body BBD2 rotate, the first main body BD1 and the second main body BD2 connected to the first support body BBD1 and the second support body BBD2 can be moved by rotating relative to the first rotation axis RX1 and the second rotation axis RX2. That is, the first rotating pin unit RPN1 and the second rotating pin unit RPN2 can provide the first rotation axis RX1 and the second rotation axis RX2 to the first main body BD1 and the second main body BD2, and the first main body BD1 and the second main body BD2 can rotate relative to the first rotation axis RX1 and the second rotation axis RX2. When the first main body BD1 and the second main body BD2 are set to face each other, the folding kit FST can fold inward.

[0213] The first gear GR1 and the second gear GR2 can be disposed below the first rotating pin unit RPN1 and the second rotating pin unit RPN2. When the first rotating pin unit RPN1 and the second rotating pin unit RPN2 rotate, the first gear GR1 and the second gear GR2 can rotate together with the first rotating pin unit RPN1 and the second rotating pin unit RPN2.

[0214] Specifically, when the first support body BBD1 and the second support body BBD2, which rotate together with the first rotating pin unit RPN1 and the second rotating pin unit RPN2, move, the first support cam BCM1 and the second support cam BCM2, which are engaged with the first support body BBD1 and the second support body BBD2, can move. When the first support cam BCM1 and the second support cam BCM2 move, the second gear GR2, which is engaged with the first support cam BCM1 and the second support cam BCM2, can rotate.

[0215] When the second gear GR2 rotates, the first gear GR1, which meshes with the second gear GR2, can rotate. That is, when the first support cam BCM1 and the second support cam BCM2 rotate and move, the first gear GR1 and the second gear GR2 can rotate together with the first support cam BCM1 and the second support cam BCM2. The first gear GR1 and the second gear GR2 can rotate respectively relative to the gear rotation axis GRX, which is parallel to the first direction DR1 and defined in the central portion of the first gear GR1 and the second gear GR2 in the first direction DR1.

[0216] When the first support cam BCM1 and the second support cam BCM2 rotate, one end of each cam can move along a guide groove GG defined in the first support body BBD1 and the second support body BBD2. When the folding kit FST is folded, the first support cam BCM1 and the second support cam BCM2, as well as the first support body BBD1 and the second support body BBD2, can move away from each other. When the first support cam BCM1 and the second support cam BCM2 move along the guide groove GG, the first support body BBD1 and the second support body BBD2 can move more easily.

[0217] Figure 19A It is along Figure 14 The sectional view taken from line II-II'. Figure 19B and Figure 19C It is used for explanation Figure 19A A view of the folded state of the folded kit.

[0218] In an embodiment, for example, in Figure 19A , Figure 19B and Figure 19CThe display module DM is shown together with the folding kit FST to illustrate the folded state of the display module DM.

[0219] Reference Figure 19A The display module DM can be mounted on the folding kit FST. The first main body BD1 can be mounted below the first non-folding area NFA1, and the second main body BD2 can be mounted below the second non-folding area NFA2. The first rotation axis RX1 and the second rotation axis RX2 can be mounted below the top surface of the display module DM.

[0220] In the plan view, the first rotation axis RX1 and the second rotation axis RX2 can be superimposed on the folding region FA. The length L of the folding region FA can be defined as the length of the folding region FA in the second direction DR2 when the display module DM is in the unfolded state.

[0221] The central frame CFM can be positioned below the folded area FA. Although not shown, the first frame FM1 and the second frame FM2, arranged together with the central frame CFM in the first direction DR1, can be positioned below the folded area FA.

[0222] The first body BD1 may extend below the first extension portion EX1 and the curved portion CSP, and the second body BD2 may extend below the second extension portion EX2 and the curved portion CSP. The first body BD1 and the second body BD2 may be adjacent to each other in the second direction DR2 below the curved portion CSP.

[0223] The top surface of the first body BD1 facing the first extension EX1 can be defined as the first inclined surface SLP1. The top surface of the first body BD1 below the first wing plate WPT1 can also be provided as the first inclined surface SLP1.

[0224] The top surface of the second body BD2 facing the second extension EX2 can be defined as the second inclined surface SLP2. The top surface of the second body BD2 below the second wing WPT2 can also be provided as the second inclined surface SLP2. The heights of the first inclined surface SLP1 and the second inclined surface SLP2 can decrease respectively in the direction toward the first side OS1 of the first body BD1 and the direction toward the first side OS2 of the second body BD2.

[0225] The first inclined surface SLP1 and the second inclined surface SLP2 can be stepped with the top surfaces of the first body BD1 and the second body BD2 located below the first non-folded region NFA1 and the second non-folded region NFA2. The boundary between the first inclined surface SLP1 and the first body BD1 located below the first non-folded region NFA1 can be defined as the first boundary BA1. The boundary between the second inclined surface SLP2 and the second body BD2 located below the second non-folded region NFA2 can be defined as the second boundary BA2.

[0226] The first wing plate WPT1 can be disposed between the first extension portion EX1 and the first inclined surface SLP1. The first wing plate WPT1 can be adjacent to the first boundary BA1. The second wing plate WPT2 can be disposed between the second extension portion EX2 and the second inclined surface SLP2. The second wing plate WPT2 can be adjacent to the second boundary BA2.

[0227] The first side of the first wing plate WPT1 and the first side of the second wing plate WPT2, which face each other, can be disposed on both sides of the central frame CFM. Specifically, the first side of the first wing plate WPT1 and the first side of the second wing plate WPT2, which face each other, can be disposed in the first groove GV1 defined on both sides of the central frame CFM. Although in Figure 19A Not shown, but the first side of the first wing plate WPT1 and the first side of the second wing plate WPT2 can be disposed in the second slot GV2 defined in the second frame FM2.

[0228] The display device DD may also include an adhesive layer ADH. The adhesive layer ADH may be disposed between the first non-folding region NFA1 and the first body BD1, and between the second non-folding region NFA2 and the second body BD2. In addition, the adhesive layer ADH may be disposed between the first extension portion EX1 and the first wing plate WPT1, and between the second extension portion EX2 and the second wing plate WPT2.

[0229] The display module DM can be attached to the first body BD1 and the second body BD2, as well as the first wing plate WPT1 and the second wing plate WPT2, via an adhesive layer ADH. Although, by way of example, the adhesive layer ADH can be double-sided tape, the invention is not limited to any particular type of adhesive layer ADH.

[0230] Reference Figure 19B and Figure 19C The display module DM can be folded when the folding kit FST is folded relative to the first rotation axis RX1 and the second rotation axis RX2. The display module DM can be folded when the folding area FA is bent. The display module DM can be folded inward so that the first non-folding area NFA1 and the second non-folding area NFA2 face each other.

[0231] When the display module DM is folded, the curved portion CSP can be bent to have a predetermined curvature. That is, the curved portion CSP can be bent to have a predetermined radius of curvature. In an embodiment, for example, the radius of curvature can be set in the range of about 1.5 mm to about 5.0 mm, more preferably about 2.5 mm.

[0232] The portion of the display module DM between the first extended portion EX1 and the first non-folding region NFA1 can be bent. The first extended portion EX1 can bend from the first non-folding region NFA1 and extend to the bent portion CSP. The first extended portion EX1, attached to the flat first wing plate WPT1, can remain flat.

[0233] The portion of the display module DM between the second extension portion EX2 and the second non-folding region NFA2 can be bent. The second extension portion EX2 can bend from the second non-folding region NFA2 and extend to the bent portion CSP. The second extension portion EX2, attached to the flat second wing plate WPT2, can remain flat.

[0234] The curved portion of the display module DM between the first extended portion EX1 and the first non-folded region NFA1 can be defined as the first inverse curvature portion ICV1. The curved portion of the display module DM between the second extended portion EX2 and the second non-folded region NFA2 can be defined as the second inverse curvature portion ICV2. When the display module DM is folded, the first inverse curvature portion ICV1 and the second inverse curvature portion ICV2 can be bent in the opposite direction to the curved portion CSP.

[0235] The adhesive layer ADH may not be provided on the bottom surface of the curved portion CSP and the bottom surfaces of the first inverse curvature portion ICV1 and the second inverse curvature portion ICV2. Each of the bottom surfaces of the curved portion CSP and the first inverse curvature portion ICV1 and the second inverse curvature portion ICV2 may be the bottom surface of the display module DM, which is the opposite surface of the front surface (e.g., the display surface) of the display module DM.

[0236] Since the adhesive layer ADH is not provided on the curved portion CSP, the curved portion CSP can be bent more easily. Furthermore, since the adhesive layer ADH is not provided on the first inverse curvature portion ICV1 and the second inverse curvature portion ICV2, the first inverse curvature portion ICV1 and the second inverse curvature portion ICV2 can be bent more easily.

[0237] When the display module DM is folded, the first wing plate WPT1 can move toward the first inclined surface SLP1 to contact the first inclined surface SLP1 according to the stress of the folding area FA. When the display module DM is folded, the second wing plate WPT2 can move toward the second inclined surface SLP2 to contact the second inclined surface SLP2 according to the stress of the folding area FA.

[0238] According to the above folding structure, when the display module DM is folded, the gap GP between the first non-folded region NFA1 and the second non-folded region NFA2 can be smaller than the gap EGP between the first extended portion EX1 and the second extended portion EX2. The gap EGP between the first extended portion EX1 and the second extended portion EX2 can gradually increase in the direction toward the curved portion CSP. Therefore, when the display module DM is folded, the display module DM can be folded into a dumbbell shape.

[0239] Reference Figure 19C When the display device DD is folded from its unfolded state, causing the first main body BD1 and the second main body BD2 to rotate approximately 90 degrees (°) clockwise and counterclockwise respectively, the folded area FA may not contact the central frame CFM. In an embodiment, for example, when the display device DD is folded, the curved portion CSP of the folded area FA may not contact the central frame CFM.

[0240] Reference Figure 18C and Figure 19C Since the first gear GR1 and the second gear GR2 are located below the rotating pin units RPN1 and RPN2, the first rotating shaft RX1 and the second rotating shaft RX2 can be located above the gear rotating shaft GRX.

[0241] The position of the curved portion CSP can vary depending on the positions of the first rotation axis RX1 and the second rotation axis RX2. When the first rotation axis RX1 and the second rotation axis RX2 of the folding kit FST are positioned below and adjacent to or superimposed on the gear rotation axis GRX, the curved portion CSP may move further downward to contact the center frame CFM. In this case, the curved portion CSP may be damaged when the display device DD is repeatedly folded and unfolded.

[0242] However, in the embodiments of the invention, since the first rotation axis RX1 and the second rotation axis RX2 are positioned higher than the gear rotation axis GRX, the bent portion CSP does not contact the central frame CFM when the display device DD is folded. As a result, damage to the bent portion CSP can be prevented.

[0243] Figure 20 It is shown Figure 19C An enlarged view of the display module.

[0244] Reference Figure 20 When the display module DM is folded, the length L of the folded area FA (refer to...) Figure 19A The length of the neutral plane NTL of the folded region FA can be defined. In an embodiment, for example, when the folded region FA is bent, the bottom surface of the folded region FA can be further extended and the top surface of the folded region FA can be further contracted compared to when the folded region FA is flat. Therefore, tensile stress can be generated in the bottom surface of the folded region FA and compressive stress can be generated in the top surface of the folded region FA.

[0245] Within the folded region FA, there may exist a portion where tensile and compressive stresses cancel each other out, and each of the tensile and compressive stresses is approximately zero. The portion of the folded region FA where the stress is approximately zero can be defined as the neutral plane NTL. In the neutral plane NTL, the length LT from the boundary between the folded region FA and the first non-folded region NFA1 to the boundary between the folded region FA and the second non-folded region NFA2 can be defined as the length L of the folded region FA.

[0246] More specifically, the length L of the folded region FA can be defined as the sum of the length of the neutral plane NTL of the curved portion CSP and the lengths of the portions of the first extension portion EX1 and the second extension portion EX2 corresponding to the neutral plane NTL of the curved portion CSP. The neutral plane NTL of the curved portion CSP can be defined as the portion of the curved portion CSP in which the tensile stress and compressive stress of the curved portion CSP cancel each other out and each of the tensile stress and compressive stress is approximately zero.

[0247] Figure 21 It is done by adding the X-axis and Y-axis Figure 19C The resulting view.

[0248] In an embodiment, for example, in Figure 21 Some figure labels have been omitted.

[0249] Reference Figure 21 The display device DD defines an X-axis (X) and a Y-axis (Y). The X-axis (X) may be parallel to the second direction DR2. The X-axis (X) may be stacked with the top surface of the unfolded display module DM. In an embodiment, for example, the X-axis (X) may be... Figure 19A The top surface of the display module DM is stacked.

[0250] The Y-axis Y can extend from the center of the folding kit FST along the third direction DR3. The top surface of the unfolded display module DM can have a plane defined by the first direction DR1 and the second direction DR2, and the Y-axis Y can be perpendicular to the top surface of the unfolded display module DM. The first rotation axis RX1 and the second rotation axis RX2 can be positioned symmetrically with respect to the Y-axis Y.

[0251] When the X-axis (X) and Y-axis (Y) are defined as described above, the coordinates of the first rotation axis RX1 and the second rotation axis RX2 can be determined. In embodiments of the invention, the positions of the first rotation axis RX1 and the second rotation axis RX2 can be optimized. The optimized positions of the first rotation axis RX1 and the second rotation axis RX2 will be described below.

[0252] Figure 22 It shows the first and second rotation axes relative to each other. Figure 21 A graph showing the X and Y coordinates of the X and Y axes.

[0253] Reference Figure 22 The positions of the first rotation axis RX1 and the second rotation axis RX2 can vary within a predetermined range. In an embodiment, for example, the X coordinate of the second rotation axis RX2 can be determined based on the following mathematical formula.

[0254]

Mathematical Formula 1

[0255] (G / 2)+T≤X≤(L / 2)

[0256] In addition, the Y coordinate of the second rotation axis RX2 can be determined based on the following mathematical formula.

[0257]

Mathematical Formula 2

[0258] Y = -X + (G / 2)

[0259] In mathematical formulas 1 and 2, G represents the distance between the first and second non-folded areas when the display module is folded, and T represents the thickness of the display module relative to the Y-axis.

[0260] The X and Y coordinates of the second rotation axis RX2 can be determined according to the above formula, and the X and Y coordinates of the first rotation axis RX1 can be symmetrical with respect to the Y-axis with respect to the X and Y coordinates of the second rotation axis RX2. The X and Y coordinates of the second rotation axis RX2 can have integer values.

[0261] When the positions of the first rotation axis RX1 and the second rotation axis RX2 are determined according to the above formula, the display module DM can be normally folded into a dumbbell shape. In the following text, the positions of the first rotation axis RX1 and the second rotation axis RX2 that satisfy the conditions according to the above formula are defined as the normal position.

[0262] When the rotation axis is set at a position deviating from the position determined by the above formula, the display module DM may fail to fold properly. In the following text, it will be explained... Figures 23 to 27The abnormal folding structure is described in the text. The first rotation axis RX1' and RX1" and the second rotation axis RX2' and RX2" can be defined as rotation axes that deviate from their normal positions.

[0263] Figure 23 This is a view showing the first and second wing plates rotating along a first and a second rotation axis set in their normal positions.

[0264] Reference Figure 23 The first wing plate WPT1 can rotate relative to the first rotation axis RX1, and the second wing plate WPT2 can rotate relative to the second rotation axis RX2. Figure 23 The second rotation axis RX2 in the middle can be with Figure 22 The left boundary of the X-coordinate condition of the second rotation axis RX2 is adjacent. The distance between a portion of the first wing plate WPT1 and a portion of the second wing plate WPT2 in the second direction DR2 can be defined as the first distance DT1.

[0265] In an embodiment, for example, Figure 23 A first wing plate WPT1, rotated approximately 45° relative to a first rotation axis RX1, and a second wing plate WPT2, rotated approximately 45° relative to a second rotation axis RX2, are shown. In this case, the display device DD can be as follows: Figure 19B The ground is folded at 45° as shown.

[0266] Figure 24 and Figure 25 This is a view showing the first and second wing plates rotating along a first and second rotation axis that are off-center from their normal positions. Figure 26 and Figure 27 This shows when the first and second wing plates are along Figure 24 and Figure 25 A view showing the state of the display device as the first and second rotating axes, which are deviated from their normal positions, rotate.

[0267] In the embodiments, for example, for simplicity, in Figure 26 and Figure 27 Only the first main body BD1 and the second main body BD2, the first wing plate WPT1 and the second wing plate WPT2, and the display module DM are shown.

[0268] Reference Figure 24 The first rotation axis RX1' and the second rotation axis RX2' can be set to be farther from the Y-axis than the first rotation axis RX1 and the second rotation axis RX2'. The first winglet WPT1 can rotate relative to the first rotation axis RX1', and the second winglet WPT2 can rotate relative to the second rotation axis RX2'.

[0269] The distance between a portion of the first wingplate WPT1 and a portion of the second wingplate WPT2 in the second direction DR2 can be defined as the second distance DT2. The second distance DT2 can be greater than the first distance DT1.

[0270] In an embodiment, for example, Figure 24 A first airfoil WPT1 rotated approximately 45° relative to a first rotation axis RX1' and a second airfoil WPT2 rotated approximately 45° relative to a second rotation axis RX2' are shown.

[0271] Reference Figure 25 The first rotation axis RX1” and the second rotation axis RX2” can be set to be closer to the Y-axis than the first rotation axis RX1” and the second rotation axis RX2”. The first wing plate WPT1 can rotate relative to the first rotation axis RX1”, and the second wing plate WPT2 can rotate relative to the second rotation axis RX2”.

[0272] The distance between a portion of the first wingplate WPT1 and a portion of the second wingplate WPT2 in the second direction DR2 can be defined as a third distance DT3. The third distance DT3 can be less than the first distance DT1.

[0273] In an embodiment, for example, Figure 25 A first airfoil WPT1 rotated approximately 45° relative to a first rotation axis RX1” and a second airfoil WPT2 rotated approximately 45° relative to a second rotation axis RX2” are shown.

[0274] Reference Figure 24 and Figure 26 As described above, the second distance DT2 can be greater than the first distance DT1. Therefore, when the first wingplate WPT1 and the second wingplate WPT2 rotate relative to the first rotation axis RX1' and the second rotation axis RX2', the first wingplate WPT1 and the second wingplate WPT2 will be further spaced apart from each other.

[0275] As the first wing plate WPT1 and the second wing plate WPT2 further separate from each other, the folding area FA will stretch further, and will... Figure 26 The bending phenomenon of the display module DM is shown in the figure.

[0276] Reference Figure 25 and Figure 27 As described above, the third distance DT3 can be smaller than the first distance DT1. Therefore, when the first wingplate WPT1 and the second wingplate WPT2 rotate more than about 45° relative to the first rotation axis RX1” and the second rotation axis RX2”, the first wingplate WPT1 and the second wingplate WPT2 can become further adjacent to each other.

[0277] When the first wing plate WPT1 and the second wing plate WPT2 become closer to each other, the folding area FA will fold further, and part of the folding area FA will be as follows: Figure 27 The grounds shown are in contact with each other.

[0278] Therefore, when the display device DD is folded relative to the first rotation axis RX1' and the second rotation axis RX2', as well as the first rotation axis RX1" and the second rotation axis RX2" which are deviating from the normal range, the display module DM may not be able to fold into a dumbbell shape normally. When the display device DD is folded relative to the first rotation axis RX1 and the second rotation axis RX2, the display module DM can be folded into a dumbbell shape normally.

[0279] As a result, in the embodiments of the invention, since the first rotation axis RX1 and the second rotation axis RX2 of the hinge module HGM are optimized to make the display module DM fold into a dumbbell shape, the display module DM can be folded into a dumbbell shape more easily.

[0280] Figure 28 It is shown Figure 19C An enlarged view of the first region A1. Figure 29 It is shown Figure 28 A view of the unfolded state of the second inverse curvature section.

[0281] Figure 28 This is a view showing the peripheral components of the second anti-curvature portion ICV2 when the display device DD is folded. Figure 29 This is a view showing the peripheral components of the second anti-curvature portion ICV2 when the display device DD is unfolded.

[0282] Despite Figure 28 and Figure 29 The peripheral components of the second inverse curvature portion ICV2 are shown, but the peripheral components of the first inverse curvature portion ICV1, which are not shown, may be substantially the same as those of the second inverse curvature portion ICV2.

[0283] Reference Figure 28 and Figure 29 Each of the top surfaces of the second body BD2 and the second wing WPT2, which are adjacent to each other, may have a curved surface. In an embodiment, for example, each of the first top surface US1 of the second wing WPT2 adjacent to the second boundary BA2 and the second top surface US2 of the second body BD2, which is disposed below the second non-folded region NFA2 and adjacent to the second boundary BA2, may have a curved surface.

[0284] Although not shown, each of the top surfaces of the first body BD1 and the first wing plate WPT1, which are adjacent to each other, may have a curved surface. In an embodiment, for example, each of the first top surface of the first wing plate WPT1 adjacent to the first boundary BA1 and the second top surface of the first body BD1 disposed below the first non-folded region NFA1 and adjacent to the first boundary BA1 may have a curved surface.

[0285] The side portion WOS of the second boundary BA2 and the second wing WPT2 adjacent to the second boundary BA2 can be configured to be adjacent to the central portion of the second inverse curvature portion ICV2. Although not shown, the side portions of the first boundary BA1 and the first wing WPT1 adjacent to the first boundary BA1 can be configured to be adjacent to the central portion of the first inverse curvature portion ICV1.

[0286] like Figure 28 As shown, when the display module DM is folded, each of the curved surfaces of the first top surface US1 and the second top surface US2 can correspond to the curved surface of the second inverse curvature portion ICV2. Each of the curved surfaces of the first top surface US1 and the second top surface US2 can have a curvature substantially the same as the curvature of the curved surface of the second inverse curvature portion ICV2. Each of the curved surfaces of the first top surface US1 and the second top surface US2 can have a curvature substantially the same as the curvature of the bottom surface of the second inverse curvature portion ICV2.

[0287] Although not shown, when the display module DM is folded, each of the first top surface of the first wing plate WPT1 adjacent to the first boundary BA1 and the second top surface of the first body BD1 adjacent to the first boundary BA1 can correspond to the curved surface of the first inverse curvature portion ICV1.

[0288] Because the first top surface US1 and the second top surface US2 have curved surfaces, the second inverse curvature portion ICV2 can bend more easily along the first top surface US1 and the second top surface US2.

[0289] Figure 30 It is along Figure 14 The sectional view taken from line III-III'. Figure 31 It is shown Figure 30 A view of the unfolded state of the second inverse curvature section.

[0290] Figure 30 This is a view showing the peripheral components of the second inverse curvature portion ICV2 when the display device DD is unfolded, and Figure 31 This is a view showing the peripheral components of the second anti-curvature portion ICV2 when the display device DD is folded. Figure 30 and Figure 31 The image also shows the display module DM. Furthermore, in... Figure 31 The circular dashed line in the middle simply shows Figure 30 The peripheral components of the second anti-curvature section of ICV2.

[0291] Despite Figure 30 and Figure 31 The peripheral components of the second inverse curvature portion ICV2 are shown, but the peripheral components of the first inverse curvature portion ICV1, which are not shown, may be substantially the same as those of the second inverse curvature portion ICV2.

[0292] In the following text, they will be described together as needed. Figure 9 and Figure 14 .

[0293] Reference Figure 9 , Figure 14 , Figure 30 and Figure 31 The second rotating surface RTS2, defined in the second body BD2, may have a concave curved shape. Although not shown, the first rotating surface RTS1, defined in the first body BD1, may also have a concave curved shape.

[0294] The second joining portion CUP2 of the second wing plate WPT2 may have a convex curved shape and contact the second rotating surface RTS2. The second joining portion CUP2 may have a curvature substantially the same as that of the second rotating surface RTS2. Although not shown, the first joining portion CUP1 of the first wing plate WPT1 may also have a convex curved shape and contact the first rotating surface RTS1.

[0295] The center point of the circle defined by the curved surface of the second joining portion CUP2 can be defined as the wing rotation axis WRX. When the display module DM is folded, the second joining portion CUP2 can move and rotate along the curved surface of the second rotation surface RTS2. That is, when the display module DM is folded, the second joining portion CUP2 can rotate along the wing rotation axis WRX.

[0296] Although not shown, when the display module DM is folded, the first connecting part CUP1 can also rotate along the wing rotation axis WRX adjacent to the first rotating surface RTS1 to move and rotate along the curved surface of the first rotating surface RTS1.

[0297] The display module DM and the bezel cover BZC described above can be disposed on the first wing plate WPT1 and the second wing plate WPT2 to fix the first wing plate WPT1 and the second wing plate WPT2. Therefore, the first connecting part CUP1 and the second connecting part CUP2 can be easily disposed on the first rotating surface RTS1 and the second rotating surface RTS2, instead of being separated from the first rotating surface RTS1 and the second rotating surface RTS2.

[0298] According to the above structure, the first connecting portion CUP1 and the second connecting portion CUP2 can be rotated by easily contacting the first rotating surface RTS1 and the second rotating surface RTS2 instead of using pins for connecting the first connecting portion CUP1 and the second connecting portion CUP2 to the first body BD1 and the second body BD2.

[0299] According to an embodiment of the invention, since the first and second rotation axes are optimized to fold the display module into a dumbbell shape, the display module can be folded into a dumbbell shape more easily.

[0300] Although embodiments of the invention have been described, it is understood that the invention should not be limited to these embodiments, but can be modified and altered in various ways by those skilled in the art within the spirit and scope of the claimed invention. Therefore, to the fullest extent permitted by law, the scope of the invention shall be determined by the broadest permissible interpretation of the claims and their equivalents, and shall not be construed or limited by the foregoing detailed description.

Claims

1. A display device, the display device comprising: The display module includes a first non-foldable area, a second non-foldable area, and a foldable area located between the first non-foldable area and the second non-foldable area. as well as A folding kit is disposed on a first surface of the display module and defines a first rotation axis and a second rotation axis, both of which extend along a first direction. The folded region, the first non-folded region, and the second non-folded region are arranged along a second direction intersecting the first direction. A first axis parallel to the second direction and overlapping the second surface of the display module, and a second axis perpendicular to the second surface of the display module at the center of the folded assembly, are defined. The second surface of the display module is opposite to the first surface of the display module. The first coordinate of the second rotation axis relative to the first axis is determined by the following formula: ， Where X represents the first coordinate, G represents the distance between the first and second non-folded areas when the display module is folded, T represents the thickness of the display module measured relative to the second axis, and L represents the length of the folded area relative to the second direction when the display module is unfolded. The second coordinate of the second rotation axis relative to the second axis is determined by the following formula: ， Where Y represents the second coordinate, and Wherein, the first coordinate of the first rotation axis relative to the first axis and the second coordinate of the second rotation axis are symmetrical with respect to the second axis.

2. The display device according to claim 1, wherein, The first rotation axis and the second rotation axis are disposed on the first surface of the display module.

3. The display device according to claim 1, wherein, The first rotation axis is symmetrical with respect to the second axis.

4. The display device according to claim 1, wherein, When the folding kit rotates relative to the first and second rotation axes, the display module folds inward as the folding area bends.

5. The display device according to claim 1, wherein, When the display module is folded, the length L is set to the length of the neutral plane of the folded region, and the neutral plane is defined as the portion where each of the compressive stress and tensile stress in the folded region is zero.

6. The display device according to claim 1, wherein, The folding kit includes: The first main body is stacked with the first non-folded region; The second main body is stacked with the second non-folded region; Multiple support structures are connected to the first main body and the second main body; A plurality of rotating pin units, connected to the plurality of support bodies and extending along the first direction, respectively provide the first rotating shaft and the second rotating shaft to the first body and the second body; and Multiple gears, spaced apart from the multiple rotating pin units and extending along the first direction, rotate together with the multiple rotating pin units.

7. The display device according to claim 6, wherein, The plurality of gears are disposed on the side of the plurality of rotating pin units opposite to the display module, and the first body and the second body rotate relative to the first rotating axis and the second rotating axis, respectively.

8. The display device according to claim 6, wherein, The plurality of gears includes: A plurality of first gears, extending along the first direction and meshing with each other in the second direction; and A plurality of second gears extend along the first direction and are arranged such that the plurality of first gears are located between the plurality of second gears. The plurality of first gears and the plurality of second gears mesh with each other in the second direction and rotate relative to a gear rotation axis parallel to the first direction.

9. The display device of claim 8, further comprising a plurality of support cams, the plurality of support cams including a first side and a second side, the first side being coupled to and rotating together with the plurality of second gears, the second side projecting in a first direction and disposed in a guide groove defined in the plurality of support bodies, the guide groove extending in a second direction, and When the plurality of rotating pin units rotate, the second side of the plurality of support cams moves along the guide groove shown.

10. The display device according to claim 6, wherein, The folded region includes: The curved portion bends to have a predetermined curvature when the display module is folded. A first extended portion is disposed between the first non-folded region and the curved portion; and The second extension portion is disposed between the second non-folded region and the curved portion.

11. The display device according to claim 10, wherein, The length L is defined as the sum of the length of the neutral surface of the curved portion and the lengths of the portions of the first and second extended portions corresponding to the neutral surface of the curved portion, and the neutral surface is defined as the portion where each of the compressive stress and tensile stress of the curved portion is zero.

12. The display device according to claim 10, wherein, When the display module is folded, the distance between the first non-folded area and the second non-folded area is less than the distance between the first extended portion and the second extended portion.

13. The display device according to claim 10, wherein, The first main body is stacked with the first extended portion, and the second main body is stacked with the second extended portion. The surface of the first body facing the first extended portion includes a first inclined surface, and the surface of the second body facing the second extended portion includes a second inclined surface. The heights of the first inclined surface and the second inclined surface gradually decrease in the direction toward the first side of the first body and the first side of the second body, respectively, and the first side of the first body and the first side of the second body face each other.

14. The display device according to claim 13, further comprising: A first wing plate is disposed between the first extended portion and the first inclined surface, and is rotatably coupled to a first boundary located between a flat surface of the first body facing the first non-folded area and the first inclined surface. as well as A second wing plate is disposed between the second extended portion and the second inclined surface, and is rotatably coupled to a second boundary located between the flat surface of the second body facing the second non-folded region and the second inclined surface. When the display module is folded, the first wing plate and the second wing plate respectively contact the first inclined surface and the second inclined surface.

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