Electronic device

Abstract

An electronic device comprises a display module including a first non-folding region arranged in a first direction, a second non-folding region, and a folding region disposed between the first and second non-folding regions; a case including a first case overlapping the first non-folding region and a second case overlapping the second non-folding region; and a hinge portion disposed between the first case and the second case and defining biaxial rotation axes extending parallel to a second direction intersecting the first direction, wherein the hinge portion comprises a frame disposed between the first case and the second case, a first rotor disposed between the first case and the frame, a first link coupled to at least one of the two sides of the first rotor opposite each other in the second direction and comprising first protrusions disposed on one side adjacent to the frame, a second rotor disposed between the second case and the frame, a second link coupled to at least one of the two sides of the second rotor opposite each other in the second direction and comprising second protrusions disposed on one side adjacent to the frame, and the first It includes protrusions and a plurality of connecting gears engaged with the second protrusions, and the number of the first protrusions and the number of the second protrusions may be different from each other.

Description

Technology Field

[0001] The present invention relates to an electronic device. Background Technology

[0002] Generally, electronic devices that provide video to users, such as smartphones, digital cameras, laptop computers, navigation systems, and smart televisions, include electronic devices for displaying video. The electronic device generates video and provides it to the user through a display screen.

[0003] With the recent advancement of electronic technology, various types of display devices are being developed. For example, flexible electronic devices that can be slid or wound to extend outside the case are being developed. Flexible electronic devices that can be varied in shape are easy to carry and can improve user convenience. The problem to be solved

[0004] The objective of the present invention is to provide an electronic device with reduced case thickness. means of solving the problem

[0005] An electronic device according to one embodiment of the present invention comprises: a display module including a first non-folding region arranged in a first direction, a second non-folding region, and a folding region disposed between the first and second non-folding regions; a case including a first case overlapping the first non-folding region and a second case overlapping the second non-folding region; and a hinge portion disposed between the first case and the second case and defining biaxial rotation axes extending parallel to a second direction intersecting the first direction, wherein the hinge portion comprises a frame disposed between the first case and the second case, a first rotor disposed between the first case and the frame, a first link coupled to at least one of the two sides of the first rotor opposite each other in the second direction and comprising first protrusions disposed on one side adjacent to the frame, a second rotor disposed between the second case and the frame, and a second link coupled to at least one of the two sides of the second rotor opposite each other in the second direction and comprising second protrusions disposed on one side adjacent to the frame. It includes a link, and a plurality of connecting gears engaged with at least one first protrusion among the first protrusions and at least one second protrusion among the second protrusions, wherein the number of the first protrusions and the number of the second protrusions may be different from each other.

[0006] An electronic device according to one embodiment of the present invention comprises: a display module including a first non-folding region arranged in a first direction, a second non-folding region, and a folding region disposed between the first and second non-folding regions; a case including a first case overlapping the first non-folding region and a second case overlapping the second non-folding region; and a hinge portion disposed between the first case and the second case and defining biaxial rotation axes extending parallel to a second direction intersecting the first direction, wherein the hinge portion comprises a frame disposed between the first case and the second case, a first hinge including a first rotor coupled to one side adjacent to the first case among the two sides of the frame opposite to each other in the first direction, and a first link coupled to at least one side of the first rotor opposite to each other in the second direction, a second rotor coupled to the other side adjacent to the second case among the two sides of the frame opposite to each other in the first direction, and a second link coupled to at least one side of the second rotor opposite to each other in the second direction. A hinge, and at least one connecting gear disposed between the first hinge and the second hinge and connecting the first link and the second link to each other, and when the display module is folded, the first case and the second case rotate around the biaxial rotation axis to face each other, and the rotation angle of the first link may be greater than the rotation angle of the second link. Effects of the invention

[0007] According to an embodiment of the present invention, when the folding area of ​​a display module is folded, the portion of the folding area adjacent to the first case may include a reverse curvature portion, and the portion of the folding area adjacent to the second case may not include a reverse curvature portion. Accordingly, the thickness of the second case may be smaller than the thickness of the first case. Therefore, the thickness of the electronic device may be reduced. Brief explanation of the drawing

[0008] FIG. 1 is a perspective view of an electronic device according to an embodiment of the present invention. Figure 2 is a drawing showing the folded state of the electronic device shown in Figure 1. Figure 3 is an exploded perspective view of the electronic device shown in Figure 1. Figure 4 is a block diagram of the electronic device shown in Figure 3. Figure 5 is a schematic cross-sectional view of the display module shown in Figure 3. FIG. 6 is a drawing illustrating an exemplary cross-section of the display panel shown in FIG. 5. Figure 7 is a plan view of the display module shown in Figure 3. FIG. 8 is a diagram exemplarily illustrating a cross-section of an electronic panel corresponding to a pixel shown in FIG. 7. FIG. 9a is a cross-sectional view of a display device corresponding to the line I-I' shown in FIG. 7. Figure 9b is a drawing showing the bent state of the bending area shown in Figure 9a. FIG. 10 is an exploded perspective view of the hinge module shown in FIG. 3. FIG. 11 is a cross-sectional view illustrating the combination of the first plate and the wing plate shown in FIG. 10. FIG. 12 is a plan view of the hinge case shown in FIG. 10. FIG. 13 is an exploded perspective view of the hinge portion shown in FIG. 10. FIG. 14a is a perspective view illustrating the combination of the frame and the first rotor. FIG. 14b is a cross-sectional view of the frame and the first rotor corresponding to the line II-II' shown in FIG. 14a. FIG. 15 is a perspective view illustrating the combination of a frame, a first rotor, and first links. FIG. 16a is a perspective view illustrating the combination of the frame and the second link. FIG. 16b is a cross-sectional view of the frame, the first link, and the second link corresponding to the line III-III' shown in FIG. 16a. FIG. 17 is a perspective view illustrating the combination of a frame, a second rotor, and second links. FIG. 18a is a perspective view illustrating the combination of a frame, connecting gears, caps, springs, and spring pins. FIG. 18b is a cross-sectional view of the second links and connecting gears corresponding to the line IV-IV' shown in FIG. 18a. FIG. 19 is a perspective view illustrating the connection between the hinge portions and the first and second cases. FIG. 20a is a cross-sectional view of a hinge module (EDC) corresponding to the line V-V' shown in FIG. 19. FIG. 20b is a cross-sectional view showing the hinge module (EDC) illustrated in FIG. 20a in a folded state. FIGS. 21a and FIGS. 21b are cross-sectional views illustrating the rotation of the first link and the second link. Specific details for implementing the invention

[0009] In this specification, where a component (or region, layer, part, etc.) is described as being “on,” “connected,” or “joined” another component, it means that it may be directly placed / connected / joined on the other component, or that a third component may be placed between them.

[0010] Identical reference numerals denote identical components. Additionally, in the drawings, the thicknesses, proportions, and dimensions of components are exaggerated for the effective illustration of the technical content. “And / or” includes all one or more combinations that the associated components may define.

[0011] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0012] Additionally, terms such as “below,” “lower,” “above,” and “upper” are used to describe the relationships between the components depicted in the drawings. These terms are relative concepts and are described based on the directions indicated in the drawings.

[0013] Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0014] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Furthermore, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an overly ideal or overly formal sense unless explicitly defined herein.

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0017] FIG. 1 is a perspective view of an electronic device according to an embodiment of the present invention. FIG. 2 is a drawing showing the folded state of the electronic device shown in FIG. 1.

[0018] Referring to FIG. 1, the electronic device (ED) may be a device that is activated by an electrical signal and displays an image. For example, the electronic device (ED) may be a large device such as a television or an outdoor billboard, as well as a small to medium-sized device such as a monitor, a mobile phone, a tablet, a navigation system, or a game console. However, the embodiments of the electronic device (ED) are exemplary and are not limited to any one of them without departing from the concept of the present invention. In this embodiment, the electronic device (ED) is illustrated as a mobile phone.

[0019] An electronic device (ED) according to an embodiment of the present invention may have a rectangular shape having short sides extending in a first direction (DR1) and long sides extending in a second direction (DR2) intersecting the first direction (DR1). However, it is not limited thereto, and the electronic device (ED) may have various shapes such as a circle and a polygon. The electronic device (ED) may be flexible.

[0020] Hereinafter, the direction that intersects substantially perpendicularly with the plane defined by the first direction (DR1) and the second direction (DR2) is defined as the third direction (DR3). Additionally, in this specification, "when viewed in a plane" may be defined as the state viewed from the third direction (DR3).

[0021] The electronic device (ED) may include a folding region (FA) and a plurality of non-folding regions (NFA1, NFA2). The non-folding regions (NFA1, NFA2) may include a first non-folding region (NFA1) and a second non-folding region (NFA2). The folding region (FA) may be positioned between the first non-folding region (NFA1) and the second non-folding region (NFA2). The first non-folding region (NFA1), the folding region (FA), and the second non-folding region (NFA2) may be arranged in a first direction (DR1).

[0022] For example, one folding region (FA) and two non-folding regions (NFA1, NFA2) are illustrated, but the number of folding regions (FA) and non-folding regions (NFA1, NFA2) is not limited thereto. For example, an electronic device (ED) may include more than two non-folding regions and multiple folding regions positioned between the non-folding regions.

[0023] The upper surface of the electronic device (ED) can be defined as a display surface (DS), and the display surface (DS) may have a plane defined by a first direction (DR1) and a second direction (DR2). Images (IM) generated by the electronic device (ED) can be provided to a user through the display surface (DS).

[0024] The display surface (DS) may include a display area (DA) and a non-display area (NDA) surrounding the display area (DA). The display area (DA) may display an image, and the non-display area (NDA) may not display an image. The non-display area (NDA) may surround the display area (DA) and define a border of an electronic device (ED) that is printed in a predetermined color.

[0025] Referring to FIG. 2, the electronic device (ED) may be a foldable electronic device (ED) that can be folded or unfolded. For example, the electronic device (ED) may be folded by bending the folding region (FA) with respect to a folding axis (FX) parallel to the second direction (DR2). The folding axis (FX) may be defined as a major axis parallel to the long side of the electronic device (ED). When the electronic device (ED) is folded, the first non-folding region (NFA1) and the second non-folding region (NFA2) face each other, and the electronic device (ED) may be in-folded so that the display surface (DS) is not exposed to the outside. However, embodiments of the present invention are not limited thereto. For example, although not illustrated, the electronic device (ED) may be out-folded with respect to the folding axis (FX) so that the display surface (DS) is exposed to the outside. Additionally, although not shown, the electronic device (ED) may be in-folding and out-folding simultaneously.

[0027] Figure 3 is an exploded perspective view of the electronic device shown in Figure 1.

[0028] Referring to FIG. 3, the electronic device (ED) may include a display device (DD), an electronic module (EM), a power module (PSM), and a hinge module (EDC). Although not illustrated, the electronic device (ED) may further include a mechanical structure (e.g., a hinge part (HGP, see FIG. 10)) for controlling the folding operation of the display device (DD). The hinge part (HGP, see FIG. 10) will be described in detail below.

[0029] The display device (DD) can generate an image and detect external input. The display device (DD) may include a window module (WM) and a display module (DM). The window module (WM) can provide the front of the electronic device (ED). The window module (WM) can be placed on the display module (DM) to protect the display module (DM). The window module (WM) can transmit light generated by the display module (DM) to provide it to the user.

[0030] The display module (DM) may include a display panel (DP). Although only the display panel (DP) among the stacked structures of the display module (DM) is illustrated in FIG. 3, the display module (DM) may substantially include a plurality of additional components positioned above and below the display panel (DP). The detailed stacked structure of the display module (DM) will be described in detail below. The display panel (DP) may include a display area (DA) and a non-display area (NDA) corresponding to the display area (DA) and non-display area (NDA) of FIG. 1 of the electronic device (ED).

[0031] The display module (DM) may include a data driver (DDV) disposed on a non-display area (NDA) of the display panel (DP). The data driver (DDV) may be manufactured in the form of an integrated circuit chip and mounted on the non-display area (NDA). However, it is not limited thereto, and the data driver (DDV) may be mounted on a flexible circuit board connected to the display panel (DP).

[0032] The electronic module (EM) and the power module (PSM) may be placed within the hinge module (EDC). For example, FIG. 3 illustrates the electronic module (EM) and the power module (PSM) exposed to the outside from the hinge module (EDC). Although not illustrated, the electronic module (EM) and the power module (PSM) may be connected to each other via separate flexible circuit boards. The electronic module (EM) can control the operation of the display device (DD). The power module (PSM) can supply power to the electronic module (EM).

[0033] The hinge module (EDC) can accommodate a display device (DD), an electronic module (EM), and a power module (PSM). The hinge module (EDC) may include two first and second cases (HS1, HS2) to fold the display device (DD). The first and second cases (HS1, HS2) may extend in a second direction (DR2) and be arranged in a first direction (DR1).

[0034] The hinge module (EDC) may further include a cover plate (SPT). The cover plate (SPT) may be placed on the first and second cases (HS1, HS2). The cover plate (SPT) may include a first cover plate (SPT1), a wing plate (WPT), and a second cover plate (SPT2). The first cover plate (SPT1) and the wing plate (WPT) may overlap with the first case (HS1). The second cover plate (SPT2) may overlap with the second case (HS2). The cover plate (SPT) will be described in detail below.

[0036] Figure 4 is a block diagram of the electronic device shown in Figure 3.

[0037] Referring to FIG. 4, the electronic device (ED) may include an electronic module (EM), a power module (PSM), and a display device (DD). The electronic module (EM) may include a control module (10), a wireless communication module (20), a video input module (30), an audio input module (40), an audio output module (50), a memory (60), and an external interface module (70), etc. The modules may be mounted on a circuit board or electrically connected through a flexible circuit board. The electronic module (EM) may be electrically connected to the power module (PSM).

[0038] The control module (10) can control the overall operation of the electronic device (ED). For example, the control module (10) can activate or deactivate the display device (DD) in response to user input. The control module (10) can control the video input module (30), the audio input module (40), and the audio output module (50), etc., in response to user input. The control module (10) may include at least one microprocessor.

[0039] The wireless communication module (20) can transmit and receive wireless signals with another terminal using a Bluetooth or Wi-Fi line. The wireless communication module (20) can transmit and receive voice signals using a general communication line. The wireless communication module (20) may include a transmitting circuit (22) that modulates and transmits a signal to be transmitted, and a receiving circuit (24) that demodulates a received signal.

[0040] The video input module (30) can process a video signal and convert it into video data that can be displayed on a display device (DD). The sound input module (40) can receive an external sound signal via a microphone in a recording mode or voice recognition mode and convert it into electrical voice data. The sound output module (50) can convert sound data received from the wireless communication module (20) or sound data stored in the memory (60) and output it externally.

[0041] The external interface module (70) can serve as an interface connected to an external charger, a wired / wireless data port, and a card socket (e.g., a memory card, SIM / UIM card).

[0042] The power module (PSM) can supply power necessary for the overall operation of the electronic device (ED). The power module (PSM) may include a conventional battery device.

[0044] Figure 5 is a schematic cross-sectional view of the display module shown in Figure 3.

[0045] Referring to FIG. 5, the display module (DM) may include a display panel (DP), an input sensing unit (ISP) disposed on the display panel (DP), an anti-reflection layer (RPL) disposed on the input sensing unit (ISP), and a panel protection layer (PPL) disposed below the display panel (DP). The display panel (DP) may be a flexible display panel. For example, the display panel (DP) may include a flexible substrate and a plurality of elements disposed on the flexible substrate.

[0046] A display panel (DP) according to one embodiment of the present invention may be a light-emitting display panel and is not particularly limited. For example, the display panel (DP) may be an organic light-emitting display panel or an inorganic light-emitting display panel. The light-emitting layer of an organic light-emitting display panel may include an organic light-emitting material. The light-emitting layer of an inorganic light-emitting display panel may include quantum dots and quantum rods, etc. Hereinafter, the display panel (DP) is described as an organic light-emitting display panel.

[0047] The input sensing unit (ISP) may include a plurality of sensor units (not shown) for detecting external input using a capacitive method. The input sensing unit (ISP) may be formed directly on the display panel (DP) during the manufacturing of the display module (DM).

[0048] The anti-reflective layer (RPL) can be placed on the input sensing unit (ISP). The anti-reflective layer (RPL) can be formed directly on the input sensing unit (ISP) during the manufacturing of the display module (DM). The anti-reflective layer (RPL) can be defined as an external light anti-reflective film. The anti-reflective layer (RPL) can reduce the reflectivity of external light incident from the display device (DD) toward the display panel (DP).

[0049] For example, an input sensing unit (ISP) may be formed directly on a display panel (DP) and an anti-reflection layer (RPL) may be formed directly on an input sensing unit (ISP), but embodiments of the present invention are not limited thereto. For example, the input sensing unit (ISP) may be manufactured separately and attached to the display panel (DP) by an adhesive layer, and the anti-reflection layer (RPL) may be manufactured separately and attached to the input sensing unit (ISP) by an adhesive layer.

[0050] The display panel (DP), input sensing unit (ISP), and anti-reflection layer (RPL) can be defined as an electronic panel (EP).

[0051] A panel protection layer (PPL) may be placed under a display panel (DP). The panel protection layer (PPL) may protect the lower part of the display panel (DP). The panel protection layer (PPL) may include a flexible plastic material. For example, the panel protection layer (PPL) may include polyethylene terephthalate (PET).

[0053] FIG. 6 is a drawing illustrating an exemplary cross-section of the display panel shown in FIG. 5.

[0054] For example, FIG. 6 shows a cross-section of a display panel (DP) viewed from a second direction (DR2).

[0055] Referring to FIG. 6, the display panel (DP) may include a substrate (SUB), a circuit element layer (DP-CL) disposed on the substrate (SUB), a display element layer (DP-OLED) disposed on the circuit element layer (DP-CL), and a thin film encapsulation layer (TFE) disposed on the display element layer (DP-OLED).

[0056] The substrate (SUB) may include a display area (DA) and a non-display area (NDA) around the display area (DA). The substrate (SUB) may include a flexible plastic material such as glass or polyimide (PI). A display element layer (DP-OLED) may be placed on the display area (DA).

[0057] Multiple pixels may be disposed in the circuit element layer (DP-CL) and the display element layer (DP-OLED). Each pixel may include a transistor disposed in the circuit element layer (DP-CL) and a light-emitting element disposed in the display element layer (DP-OLED) and connected to the transistor. The configuration of the pixel will be described in detail in FIG. 8.

[0058] A thin film encapsulation layer (TFE) can be placed on a circuit element layer (DP-CL) to cover a display element layer (DP-OLED). The thin film encapsulation layer (TFE) can protect the pixels from moisture, oxygen, and external foreign substances.

[0060] Figure 7 is a plan view of the display module shown in Figure 3.

[0061] Referring to FIG. 7, the display module (DM) may include a display panel (DP), a scan driver (SDV), a data driver (DDV), and an emission driver (EDV).

[0062] The display panel (DP) may include a first area (AA1), a second area (AA2), and a bending area (BA) between the first area (AA1) and the second area (AA2). The bending area (BA) extends in a second direction (DR2), and the first area (AA1), the bending area (BA), and the second area (AA2) may be arranged in a first direction (DR1).

[0063] The first region (AA1) may include a display region (DA) and a non-display region (NDA) surrounding the display region (DA). The non-display region (NDA) may surround the display region (DA). The display region (DA) is an area that displays an image, and the non-display region (NDA) may be an area that does not display an image. The second region (AA2) and the bending region (BA) may be areas that do not display an image.

[0064] The first region (AA1) may include a first non-folding region (NFA1), a second non-folding region (NFA2), and a folding region (FA) between the first non-folding region (NFA1) and the second non-folding region (NFA2) when viewed from the second direction (DR2).

[0065] A display panel (DP) may include a plurality of pixels (PX), a plurality of scan lines (SL1~SLm), a plurality of data lines (DL1~DLn), a plurality of light-emitting lines (EL1~Elm), first and second control lines (CSL1, CSL2), a power line (PL), a plurality of connection lines (CNL), and a plurality of pads (PD). m and n are natural numbers. Pixels (PX) are placed in a display area (DA) and may be connected to scan lines (SL1~SLm), data lines (DL1~DLn), and light-emitting lines (EL1~Elm).

[0066] The scanning driver (SDV) and the light-emitting driver (EDV) may be placed in a non-display area (NDA). The scanning driver (SDV) and the light-emitting driver (EDV) may be placed in non-display areas (NDA) adjacent to each other on opposite sides of the first area (AA1) in the second direction (DR2). The data driver (DDV) may be placed in the second area (AA2). The data driver (DDV) may be manufactured in the form of an integrated circuit chip and mounted on the second area (AA2).

[0067] Scan lines (SL1~SLm) can be extended in a second direction (DR2) and connected to a scanning driver (SDV). Data lines (DL1~DLn) can be extended in a first direction (DR1) and connected to a data driver (DDV) via a bending region (BA). Light emission lines (EL1~ELm) can be extended in a second direction (DR2) and connected to a light emission driver (EDV).

[0068] The power line (PL) may be extended in the first direction (DR1) and placed in the non-display area (NDA). The power line (PL) may be placed between the display area (DA) and the light-emitting driver (EDV), but is not limited thereto, and the power line (PL) may also be placed between the display area (DA) and the scanning driver (SDV).

[0069] The power line (PL) can be extended to the second region (AA2) via the bending region (BA). The power line (PL) can be extended toward the bottom of the second region (AA2) when viewed in a planar view. The power line (PL) can receive a driving voltage.

[0070] The connection lines (CNL) can be extended in a second direction (DR2) and arranged in a first direction (DR1). The connection lines (CNL) can be connected to the power line (PL) and pixels (PX). A driving voltage can be applied to the pixels (PX) through the interconnected power line (PL) and connection lines (CNL).

[0071] The first control line (CSL1) is connected to the scanning drive unit (SDV) and can extend toward the bottom of the second area (AA2) via the bending area (BA). The second control line (CSL2) is connected to the light emission drive unit (EDV) and can extend toward the bottom of the second area (AA2) via the bending area (BA). The data drive unit (DDV) can be positioned between the first control line (CSL1) and the second control line (CSL2).

[0072] When viewed in a planar view, the pads (PD) may be positioned adjacent to the bottom of the second area (AA2). The data driver (DDV), power line (PL), first control line (CSL1), and second control line (CSL2) may be connected to the pads (PD).

[0073] Data lines (DL1~DLn) can be connected to corresponding pads (PD) through a data driver (DDV). For example, data lines (DL1~DLn) are connected to a data driver (DDV), and the data driver (DDV) can be connected to pads (PD) corresponding to each of the data lines (DL1~DLn).

[0074] Although not illustrated, a printed circuit board may be connected to the pads (PDs), and a timing controller and a voltage generator may be placed on the printed circuit board. The timing controller may be manufactured as an integrated circuit chip and mounted on the printed circuit board. The timing controller and the voltage generator may be connected to the pads (PDs) through the printed circuit board.

[0075] The timing controller can control the operation of the scanning driver (SDV), the data driver (DDV), and the light-emitting driver (EDV). The timing controller can generate a scanning control signal, a data control signal, and a light-emitting control signal in response to control signals received from the outside. The voltage generator can generate a driving voltage.

[0076] A scan control signal can be provided to a scan driver (SDV) via a first control line (CSL1). A light emission control signal can be provided to a light emission driver (EDV) via a second control line (CSL2). A data control signal can be provided to a data driver (DDV). The timing controller receives video signals from an external source and converts the data format of the video signals to match the interface specifications with the data driver (DDV), and provides them to the data driver (DDV).

[0077] The scanning driver (SDV) can generate multiple scanning signals in response to a scanning control signal. The scanning signals can be applied to pixels (PX) through scanning lines (SL1 to SLm). The scanning signals can be applied to pixels (PX) sequentially.

[0078] The data driver (DDV) can generate multiple data voltages corresponding to image signals in response to a data control signal. The data voltages can be applied to pixels (PX) through data lines (DL1 to DLn). The light emission driver (EDV) can generate multiple light emission signals in response to a light emission control signal. The light emission signals can be applied to pixels (PX) through light emission lines (EL1 to ELm).

[0079] Pixels (PX) can receive data voltages in response to scanning signals. Pixels (PX) can display an image by emitting light of a brightness corresponding to the data voltages in response to light emission signals. The light emission time of the pixels (PX) can be controlled by the light emission signals.

[0081] FIG. 8 is a diagram exemplarily illustrating a cross-section of an electronic panel corresponding to a pixel shown in FIG. 7.

[0082] Referring to FIG. 8, a pixel (PX) may include a transistor (TR) and a light-emitting element (OLED). The light-emitting element (OLED) may include a first electrode (AE) (or anode), a second electrode (CE) (or cathode), a hole control layer (HCL), an electronic control layer (ECL), and a light-emitting layer (EML).

[0083] A transistor (TR) and a light-emitting element (OLED) may be disposed on a substrate (SUB). Although one transistor (TR) is illustrated as an example, substantially, the pixel (PX) may include a plurality of transistors and at least one capacitor for driving the light-emitting element (OLED).

[0084] The display area (DA) may include a light-emitting area (PA) corresponding to each of the pixels (PX) and a non-light-emitting area (NPA) around the light-emitting area (PA). A light-emitting element (OLED) may be placed in the light-emitting area (PA).

[0085] A buffer layer (BFL) is disposed on a substrate (SUB), and the buffer layer (BFL) may be an inorganic layer. A semiconductor pattern may be disposed on the buffer layer (BFL). The semiconductor pattern may include polysilicon, amorphous silicon, or a metal oxide.

[0086] The semiconductor pattern can be doped with an N-type dopant or a P-type dopant. The semiconductor pattern may include a high-doping region and a low-doping region. The conductivity of the high-doping region is greater than that of the low-doping region and can substantially serve as the source and drain electrodes of the transistor (TR). The low-doping region can substantially correspond to the active (or channel) of the transistor.

[0087] The source (S), active (A), and drain (D) of the transistor (TR) can be formed from a semiconductor pattern. A first insulating layer (INS1) can be disposed on the semiconductor pattern. The gate (G) of the transistor (TR) can be disposed on the first insulating layer (INS1). A second insulating layer (INS2) can be disposed on the gate (G). A third insulating layer (INS3) can be disposed on the second insulating layer (INS2).

[0088] The connecting electrode (CNE) may include a first connecting electrode (CNE1) and a second connecting electrode (CNE2) to connect the transistor (TR) and the light-emitting element (OLED). The first connecting electrode (CNE1) is disposed on the third insulating layer (INS3) and may be connected to the drain (D) through a first contact hole (CH1) defined in the first to third insulating layers (INS1~INS3).

[0089] A fourth insulating layer (INS4) may be disposed on a first connecting electrode (CNE1). A fifth insulating layer (INS5) may be disposed on the fourth insulating layer (INS4). A second connecting electrode (CNE2) may be disposed on the fifth insulating layer (INS5). The second connecting electrode (CNE2) may be connected to the first connecting electrode (CNE1) through a second contact hole (CH2) defined in the fourth and fifth insulating layers (INS4, INS5).

[0090] A sixth insulating layer (INS6) may be disposed on the second connecting electrode (CNE2). The layers from the buffer layer (BFL) to the sixth insulating layer (INS6) may be defined as circuit element layers (DP-CL). The first insulating layer (INS1) to the sixth insulating layer (INS6) may be inorganic layers or organic layers.

[0091] A first electrode (AE) may be disposed on the sixth insulating layer (INS6). The first electrode (AE) may be connected to a second connecting electrode (CNE2) through a third contact hole (CH3) defined in the sixth insulating layer (INS6). A pixel defining film (PDL) may be disposed on the first electrode (AE) and the sixth insulating layer (INS6), the pixel defining film having an opening (PX_OP) defined to expose a predetermined portion of the first electrode (AE).

[0092] A hole control layer (HCL) may be disposed on a first electrode (AE) and a pixel definition film (PDL). The hole control layer (HCL) may include a hole transport layer and a hole injection layer.

[0093] The emitting layer (EML) may be disposed on the hole control layer (HCL). The emitting layer (EML) may be disposed in the region corresponding to the aperture (PX_OP). The emitting layer (EML) may comprise organic and / or inorganic materials. The emitting layer (EML) may generate any one of red, green, and blue light.

[0094] The electronic control layer (ECL) may be disposed on the emitting layer (EML) and the hole control layer (HCL). The electronic control layer (ECL) may include an electron transport layer and an electron injection layer. The hole control layer (HCL) and the electronic control layer (ECL) may be disposed in common in the emitting region (PA) and the non-emitting region (NPA).

[0095] The second electrode (CE) may be placed on the electronic control layer (ECL). The second electrode (CE) may be placed in common on the pixels (PX). The layer on which the light-emitting element (OLED) is placed may be defined as a display element layer (DP-OLED).

[0096] A thin film encapsulation layer (TFE) can be disposed on a second electrode (CE) to cover a pixel (PX). The thin film encapsulation layer (TFE) may include a first encapsulation layer (EN1) disposed on the second electrode (CE), a second encapsulation layer (EN2) disposed on the first encapsulation layer (EN1), and a third encapsulation layer (EN3) disposed on the second encapsulation layer (EN2).

[0097] The first and third encapsulation layers (EN1, EN3) include an inorganic insulating layer and can protect the pixel (PX) from moisture / oxygen. The second encapsulation layer (EN2) includes an organic insulating layer and can protect the pixel (PX) from foreign substances such as dust particles.

[0098] A first voltage is applied to a first electrode (AE) through a transistor (TR), and a second voltage having a level lower than the first voltage can be applied to a second electrode (CE). Holes and electrons injected into the light-emitting layer (EML) combine to form excitons, and as the excitons transition to a ground state, the light-emitting element (OLED) can emit light.

[0099] An input sensing unit (ISP) can be disposed on the thin film encapsulation layer (TFE). The input sensing unit (ISP) can be manufactured directly on the upper surface of the thin film encapsulation layer (TFE).

[0100] A base layer (BS) may be disposed on a thin film encapsulation layer (TFE). The base layer (BS) may include an inorganic insulating layer. At least one inorganic insulating layer may be provided on the thin film encapsulation layer (TFE) as the base layer (BS).

[0101] The input sensing unit (ISP) may include a first conductive pattern (CTL1) and a second conductive pattern (CTL2) disposed on the first conductive pattern (CTL1). The first conductive pattern (CTL1) may be disposed on a base layer (BS). An insulating layer (TINS) may be disposed on the base layer (BS) to cover the first conductive pattern (CTL1). The insulating layer (TINS) may include an inorganic insulating layer or an organic insulating layer. The second conductive pattern (CTL2) may be disposed on the insulating layer (TINS).

[0102] The first and second conductive patterns (CTL1, CTL2) may overlap the non-luminous region (NPA). Although not illustrated, the first and second conductive patterns (CTL1, CTL2) may be placed on the non-luminous region (NPA) between the luminous regions (PA) and may have a mesh shape.

[0103] The first and second conductivity patterns (CTL1, CTL2) can form sensors of the aforementioned input sensing unit (ISP). For example, the mesh-shaped first and second conductivity patterns (CTL1, CTL2) can be separated from each other in a predetermined area to form sensors. A portion of the second conductivity pattern (CTL2) can be connected to the first conductivity pattern (CTL1).

[0104] An anti-reflection layer (RPL) may be disposed on the second conduction pattern (CTL2). The anti-reflection layer (RPL) may include a black matrix (BM) and a plurality of color filters (CF). The black matrix (BM) may be superimposed on a non-emissive region (NPA), and the color filters (CF) may be superimposed on emissive regions (PA), respectively.

[0105] A black matrix (BM) may be placed on an insulating layer (TINS) to cover a second conductive pattern (CTL2). An opening (B_OP) that overlaps the light-emitting region (PA) and the opening (PX_OP) may be defined in the black matrix (BM). The black matrix (BM) may absorb and block light. The width of the opening (B_OP) may be greater than the width of the opening (PX_OP).

[0106] Color filters (CF) can be placed on the first insulating layer (TINS) and the black matrix (BM). Color filters (CF) can be placed in each of the openings (B_OP). A flattening insulating layer (PINS) can be placed on the color filters (CF). The flattening insulating layer (PINS) can provide a flat top surface.

[0107] When external light traveling toward a display panel (DP) is reflected from the display panel (DP) and provided back to an external user, the user may perceive the external light, much like a mirror. To prevent this phenomenon, for example, the anti-reflective layer (RPL) may include a plurality of color filters (CF) that display the same color as the pixels (PX) of the display panel (DP). The color filters (CF) can filter the external light into colors identical to those of the pixels (PX). In this case, the external light may not be visible to the user.

[0108] However, embodiments of the present invention are not limited thereto, and the anti-reflection layer (RPL) may include a polarizing film to reduce the reflectivity of external light. The polarizing film may be manufactured separately and attached to an input sensing unit (ISP) by an adhesive layer. The polarizing film may include a phase retarder and / or a polarizer.

[0110] FIG. 9a is a cross-sectional view of a display device corresponding to the line I-I' shown in FIG. 7. FIG. 9b is a drawing showing the bent state of the bending area shown in FIG. 9a.

[0111] For example, FIG. 9a is a drawing illustrating a part of the display unit (DSP), a part of the support plate (PLT), and a part of the window module (WM).

[0112] Referring to FIG. 9a, the display device (DD) may include a display unit (DSP), a window module (WM) disposed on the display unit (DSP), and a support plate (PLT) disposed below the display unit (DSP). The support plate (PLT) may support the display module (DM). The window module (WM) may include a window (WIN), a window protection layer (WP), a hard coating layer (HC), and first and second adhesive layers (AL1, AL2).

[0113] The display unit (DSP) may include an electronic panel (EP), an impact absorption layer (ISL), a panel protection layer (PPL), a barrier layer (BRL), and third to sixth adhesive layers (AL3 to AL6). The impact absorption layer (ISL), the electronic panel (EP), the panel protection layer (PPL), the third adhesive layer (AL3), and the fourth adhesive layer (AL4) may be defined as a display module (DM). Since the configuration of the electronic panel (EP) and the panel protection layer (PPL) has been described in detail in FIG. 5 above, a description is omitted.

[0114] The shock absorption layer (ISL) can be placed on the electronic panel (EP). The shock absorption layer (ISL) can protect the electronic panel (EP) by absorbing external shocks applied from above the display device (DD) toward the electronic panel (EP). The shock absorption layer (ISL) can be manufactured in the form of a stretched film.

[0115] The shock absorbing layer (ISL) may include a flexible plastic material. The flexible plastic material may be defined as a synthetic resin film. For example, the shock absorbing layer (ISL) may include a flexible plastic material such as polyimide (PI) or polyethyleneterephthalate (PET).

[0116] The window (WIN) may be placed on an impact absorption layer (ISL). The window (WIN) may protect the electronic panel (EP) from external scratches. The window (WIN) may have optically transparent properties. The window (WIN) may include glass. However, it is not limited thereto, and the window (WIN) may include a synthetic resin film.

[0117] The window (WIN) may have a multilayer structure or a single layer structure. For example, the window (WIN) may include a plurality of synthetic resin films bonded by an adhesive, or a glass substrate and a synthetic resin film bonded by an adhesive.

[0118] A window protection layer (WP) may be placed on a window (WIN). The window protection layer (WP) may include a flexible plastic material such as polyimide or polyethylene terephthalate. A hard coating layer (HC) may be placed on the upper surface of the window protection layer (WP).

[0119] The printing layer (PIT) may be placed on the underside of the window protection layer (WP). The printing layer (PIT) may be black, but the color of the printing layer (PIT) is not limited to this. The printing layer (PIT) may be adjacent to the border of the window protection layer (WP).

[0120] A barrier layer (BRL) can be placed under a panel protection layer (PPL). The barrier layer (BRL) can increase resistance to compressive force resulting from external pressure. Therefore, the barrier layer (BRL) can serve to prevent deformation of the electronic panel (EP). The barrier layer (BRL) may include flexible plastic materials such as polyimide or polyethylene terephthalate.

[0121] The barrier layer (BRL) may have a color that absorbs light. For example, the barrier layer (BRL) may be black. In this case, when viewing the display module (DM) from above, components placed beneath the barrier layer (BRL) may not be visible.

[0122] The first adhesive layer (AL1) can be placed between the window protection layer (WP) and the window (WIN). The window protection layer (WP) and the window (WIN) can be bonded together by the first adhesive layer (AL1). The first adhesive layer (AL1) can cover the printed layer (PIT).

[0123] The second adhesive layer (AL2) can be placed between the window (WIN) and the shock absorption layer (ISL). The window (WIN) and the shock absorption layer (ISL) can be bonded together by the second adhesive layer (AL2).

[0124] The third adhesive layer (AL3) can be placed between the shock absorption layer (ISL) and the electronic panel (EP). The shock absorption layer (ISL) and the electronic panel (EP) can be bonded together by the third adhesive layer (AL3).

[0125] A fourth adhesive layer (AL4) may be placed between the electronic panel (EP) and the panel protection layer (PPL). The electronic panel (EP) and the panel protection layer (PPL) may be bonded together by the fourth adhesive layer (AL4).

[0126] A fifth adhesive layer (AL5) may be disposed between the panel protection layer (PPL) and the barrier layer (BRL). The panel protection layer (PPL) and the barrier layer (BRL) may be bonded together by the fifth adhesive layer (AL5).

[0127] A sixth adhesive layer (AL6) may be disposed between the barrier layer (BRL) and the support plate (PLT). Specifically, the support plate (PLT) may be disposed below the barrier layer (BRL), and the sixth adhesive layer (AL6) may be disposed between the barrier layer (BRL) and the support plate (PLT). The barrier layer (BRL) and the support plate (PLT) may be bonded together by the sixth adhesive layer (AL6).

[0128] The sixth adhesive layer (AL6) may overlap the first and second non-folding regions (NFA1, NFA2) and may not overlap the folding region (FA). That is, the sixth adhesive layer (AL6) may not be placed in the folding region (FA).

[0129] The first to sixth adhesive layers (AL1~AL6) may include a transparent adhesive such as a pressure-sensitive adhesive (PSA) or an optically clear adhesive (OCA), but the type of adhesive is not limited thereto.

[0130] The thickness of the panel protection layer (PPL) is smaller than the thickness of the window protection layer (WP), and the thickness of the barrier layer (BRL) may be smaller than the thickness of the panel protection layer (PPL). The thickness of the electronic panel (EP) is smaller than the thickness of the barrier layer (BRL) and may be equal to the thickness of the window (WIN). The thickness of the shock absorption layer (ISL) may be smaller than the thickness of the electronic panel (EP).

[0131] The thickness of the first adhesive layer (AL1) is equal to the thickness of the barrier layer (BRL), and the thicknesses of the second adhesive layer (AL2) and the third adhesive layer (AL3), respectively, may be equal to the thickness of the panel protection layer (PPL). The thickness of the fourth adhesive layer (AL4) may be equal to the thickness of the fifth adhesive layer (AL5).

[0132] The thickness of each of the fourth adhesive layer (AL4) and the fifth adhesive layer (AL5) may be smaller than the thickness of the electronic panel (EP) and larger than the thickness of the shock absorption layer (ISL). The sixth adhesive layer (AL6) may be smaller than the thickness of the shock absorption layer (ISL). The thickness of the hard coating layer (HC) may be smaller than the thickness of the sixth adhesive layer (AL6).

[0133] The electronic panel (EP), shock absorption layer (ISL), panel protection layer (PPL), and third and fourth adhesive layers (AL3, AL4) may have the same width as each other. The window protection layer (WP) and the first adhesive layer (AL1) may have the same width as each other. The barrier layer (BRL) and the fifth and sixth adhesive layers (AL5, AL6) may have the same width as each other.

[0134] The widths of the electronic panel (EP), shock absorption layer (ISL), panel protection layer (PPL), and third and fourth adhesive layers (AL3, AL4) may be larger than the widths of the window protection layer (WP) and the first adhesive layer (AL1). The edges of the electronic panel (EP), shock absorption layer (ISL), panel protection layer (PPL), and third and fourth adhesive layers (AL3, AL4) may be positioned outside the edges of the window protection layer (WP) and the first adhesive layer (AL1).

[0135] The widths of the window (WIN) and the second adhesive layer (AL2) may be smaller than the widths of the window protective layer (WP) and the first adhesive layer (AL1). The width of the second adhesive layer (AL2) may be smaller than the width of the window (WIN). The edges of the window (WIN) may be positioned inward from the edges of the window protective layer (WP) and the first adhesive layer (AL1). The edges of the second adhesive layer (AL2) may be positioned inward from the edges of the window (WIN).

[0136] The widths of the barrier layer (BRL) and the fifth and sixth adhesive layers (AL5, AL6) may be smaller than the widths of the window protection layer (WP) and the first adhesive layer (AL1). The edges of the barrier layer (BRL) and the fifth and sixth adhesive layers (AL5, AL6) may be positioned inward from the edges of the window protection layer (WP) and the first adhesive layer (AL1).

[0137] The support plate (PLT) can be placed below the display unit (DSP) to support the display unit (DSP). The support plate (PLT) can be placed below the electronic panel (EP) to support the electronic panel (EP). The width of the support plate (PLT) may be substantially the same as the width of the electronic panel (EP). The support plate (PLT) may have greater rigidity than the display unit (DSP).

[0138] The support plate (PLT) may include a non-metallic material. For example, the support plate (PLT) may include a reinforcing fiber composite. The reinforcing fiber composite may be carbon fiber reinforced plastic (CFRP) or glass fiber reinforced plastic (GFRP).

[0139] The support plate (PLT) can be made lighter by including a reinforced fiber composite. A support plate (PLT) according to one embodiment can have a lighter weight compared to a metal support plate using a metal material, while having a modulus and strength similar to that of a metal support plate by including a reinforced fiber composite.

[0140] In addition, since the support plate (PLT) includes a reinforced fiber composite, the shape of the support plate (PLT) can be processed more easily compared to a metal support plate. For example, a support plate (PLT) including a reinforced fiber composite can be processed more easily through a laser process or a microblast process. However, this is exemplary and is not limited thereto, and the support plate (PLT) may include a metal material.

[0141] The support plate (PLT) may include a first non-folding portion (PLT1), a folding portion (PLF), and a second non-folding portion (PLT2). The first non-folding portion (PLT1) may overlap with a first non-folding area (NFA1). The folding portion (PLF) may overlap with a folding area (FA). The second non-folding portion (PLT2) may overlap with a second non-folding area (NFA2).

[0142] A plurality of openings (OP) may be defined in the folding portion (PLF). The openings (OP) may be formed by penetrating portions of the support plate (PLT) in a third direction (DR3). When viewed from the second direction (DR2), the openings (OP) may be spaced apart in the first direction (DR1). The openings (OP) may be formed through the aforementioned laser process or microblast process. The width of the portion where the openings (OP) are formed may be smaller than the width of the open portion of the sixth adhesive layer (AL6).

[0143] By defining openings (OP) in the portion of the support plate (PLT) that overlaps the folding area (FA), the flexibility of the portion of the support plate (PLT) that overlaps the folding area (FA) can be increased. As a result, the support plate (PLT) can be folded centering on the folding area (FA).

[0144] The folding portion (PLF) may include branch portions (BR). The branch portions (BR) may be positioned between openings (OP) adjacent to each other in a first direction (DR1).

[0145] Although not shown, the display device (DD) may further include a digitizer, a shielding layer, and a heat dissipation layer disposed below the support plate (PLT).

[0146] Referring to FIG. 9b, the panel protection layer (PPL) and the fourth adhesive layer (AL4) may not be placed below the bending area (BA). The panel protection layer (PPL) and the fourth adhesive layer (AL4) may be placed below the second area (AA2) of the electronic panel (EP). The data driver (DDV) may be placed below the second area (AA2) of the electronic panel (EP).

[0147] A printed circuit board (PCB) can be connected to a second region (AA2) of an electronic panel (EP). A printed circuit board (PCB) can be connected to one side of the second region (AA2). A bending region (BA) can be bent so that the second region (AA2) is positioned below the first region (AA1). Accordingly, a data driver (DDV) and a printed circuit board (PCB) can be positioned below the first region (AA1).

[0149] FIG. 10 is an exploded perspective view of the hinge module shown in FIG. 3. FIG. 11 is a cross-sectional view illustrating the combination of the first plate and the wing plate shown in FIG. 10. FIG. 12 is a plan view of the hinge case shown in FIG. 10.

[0150] For example, FIG. 11 is a cross-sectional view illustrating a portion of the first plate (SPT1) and a portion of the wing plate (WPT).

[0151] Among the components shown in FIGS. 10 to 12, the description of components identical to those described with reference to the aforementioned drawings will be omitted or simplified.

[0152] Referring to FIG. 10, the hinge module (EDC) may include a first case (HS1), a second case (HS2), a hinge case (HCS), a plurality of hinge parts (HGP), and a cover plate (SPT).

[0153] The first case (HS1) may overlap the first non-folding region (NFA1, see FIG. 1). The second case (HS2) may overlap the second non-folding region (NFA2, see FIG. 1). The first case (HS1) and the second case (HS2) may be arranged in a first direction (DR1). When viewed in a plane, the first case (HS1) and the second case (HS2) may each be parallel to the plane defined by the first direction (DR1) and the second direction (DR2).

[0154] Receiving grooves (AGR) may be defined on the upper surface of each of the first case (HS1) and the second case (HS2). An electronic module (EM, see FIG. 3) and a power module (PSM, see FIG. 3) may be received in the receiving grooves (AGR) defined in the first and second cases (HS1, HS2).

[0155] Referring to FIGS. 10 and FIGS. 12, a hinge case (HCS) may be positioned between a first case (HS1) and a second case (HS2). The hinge case (HCS) may overlap with a folding area (FA, see FIG. 1). The hinge case (HCS) may extend in a second direction (DR1). A hinge receiving groove (HGR) may be defined on the upper surface of the hinge case (HCS).

[0156] The hinge case (HCS) may include a rod portion (BAP) and a plurality of connecting protrusions (HPT). The rod portion (BAP) may have a rod shape extending in a second direction (DR2). The hinge receiving groove (HGR) may be defined by the rod portion (BAP).

[0157] Two pairs of connecting protrusions (HPT) may be spaced apart from each other in a second direction (DR2). Each of a pair of connecting protrusions (HPT) may be spaced apart from each other in a second direction (DR2). For example, two pairs of connecting protrusions (HPT) are shown, but the number of connecting protrusions (HPT) may vary depending on the number of hinge parts (HGP). The connecting protrusions (HPT) may have a circular shape.

[0158] The hinge portions (HGP) may be spaced apart from each other in a second direction (DR2). The hinge portions (HGP) may be positioned within a hinge receiving groove (HGR) between the first case (HS1) and the second case (HS2). The hinge portions (HGP) may be coupled to a hinge case (HCS). Each of the hinge portions (HGP) may be coupled to a corresponding coupling protrusion (HPT) among the coupling protrusions (HPT) within the hinge receiving groove (HGR).

[0159] The hinge portions (HGP) can overlap the folding area (FA, see FIG. 1). The hinge portions (HGP) can define biaxial rotation axes parallel to the second direction (DR2) between the first case (HS1) and the second case (HS2). The biaxial rotation axes defined by the hinge portions (HGP) will be described in detail below.

[0160] Referring to FIGS. 3, FIGS. 10, and FIGS. 11, the cover plate (SPT) may include a first cover plate (SPT1), a wing plate (WPT), and a second cover plate (SPT2). The first cover plate (SPT1) may be parallel to a plane defined by a first direction (DR1) and a second direction (DR2). The first cover plate (SPT1) may have a rectangular shape having short sides extended in the first direction (DR1) and long sides extended in the second direction (DR2).

[0161] The first cover plate (SPT1) can overlap with the first case (HS1). The first cover plate (SPT1) can overlap with the first non-folding area (NFA1, see FIG. 1).

[0162] As illustrated in FIG. 11, the first cover plate (SPT1) may include a first flat portion (PLA1) and a wing guide portion (PGD). The upper surface of the first flat portion (PLA1) may be parallel to a plane defined by a first direction (DR1) and a second direction (DR2). The wing guide portion (PGD) may be disposed on the lower surface of the first flat portion (PLA1). The wing guide portion (PGD) may be disposed adjacent to one side facing the wing plate (WPT) among the two sides of the first flat portion (PLA1) that are opposite each other in the first direction (DR1).

[0163] A wing guide groove (PGR) can be defined by the lower surface of the first flat section (PLA1) and the upper surface of the wing guide section (PGD). The wing guide groove (PGR) can extend from one side of the first flat section (PLA1) in a first direction (DR1).

[0164] The wing plate (WPT) may be parallel to the plane defined by the first direction (DR1) and the second direction (DR2). The wing plate (WPT) may be extended further in the second direction (DR2) than in the first direction (DR1).

[0165] The wing plate (WPT) may be positioned on one side adjacent to the second case (HS2) among the two sides of the first cover plate (SPT1) that are opposite each other in the first direction (DR1).

[0166] The wing plate (WPT) may include a second flat portion (PLA2) and a wing projection (PPR). The second flat portion (PLA2) may be parallel to a plane defined by the first direction (DR1) and the second direction (DR2). The wing projection (PPR) may be disposed on the lower surface of the second flat portion (PLA2). The wing projection (PPR) may be disposed on one side adjacent to the first cover plate (SPT1) among the two sides of the second flat portion (PLA2) that are opposite each other in the first direction (DR1).

[0167] When the first cover plate (SPT1) and the wing plate (WPT) are placed on the first case (HS1), the wing plate (WPT) can be coupled to rotate relative to the first cover plate (SPT1). The wing projection (PPR) can be placed within the wing guide groove (PGR). The wing projection (PPR) can move along the wing guide groove (PGR). When the wing projection (PPR) moves along the wing guide groove (PGR), the wing plate (WPT) can be rotated relative to the first cover plate (SPT1).

[0168] Referring to FIGS. 3 and FIGS. 10, the second cover plate (SPT2) may have a rectangular shape having short sides extended in the first direction (DR1) and long sides extended in the second direction (DR2). The second cover plate (SPT2) may overlap with the second case (HS2). The second cover plate (SPT2) may overlap with the second non-folding area (NFA2, see FIG. 1).

[0169] The second cover plate (SPT2) may be positioned adjacent to the other side spaced apart from the first cover plate (SPT1) among the two sides of the wing plates (WPT) that are opposite each other in the first direction (DR1). The wing plate (WPT) may be positioned between the first cover plate (SPT1) and the second cover plate (SPT2). The first cover plate (SPT1), the wing plate (WPT), and the second cover plate (SPT2) may be arranged in the first direction (DR1).

[0171] FIG. 13 is an exploded perspective view of the hinge portion shown in FIG. 10. FIG. 14a is a perspective view illustrating the connection between the frame and the first rotor. FIG. 14b is a cross-sectional view of the frame and the first rotor corresponding to the line II-II' shown in FIG. 14a. FIG. 15 is a perspective view illustrating the connection between the frame, the first rotor, and the first links.

[0172] Hereinafter, only one of the hinge portions (HGP) shown in FIG. 10 is illustrated, but any other hinge portion (HGP) of FIG. 10 may also have substantially the same structure.

[0173] Among the components shown in FIGS. 13 to 15, the description of components identical to those described with reference to the aforementioned drawings will be omitted or simplified.

[0174] Referring to FIG. 13 and FIG. 14a, the hinge portion (HGP) may include a first rotor (RT1), a plurality of first links (LK1), a plurality of first shaft links (SF1), a frame (FRM), a plurality of connecting gears (CGR), a plurality of cams (CAM), a plurality of springs (SPR), a plurality of spring pins (PNS), a second rotor (RT2), a plurality of second links (LK2), and a plurality of second shaft links (SF2).

[0175] A plurality of housing coupling openings (CAP) may be defined on the upper surface of the frame (FRM). The housing coupling openings (CAP) may be spaced apart from each other in a second direction (DR2). The housing coupling openings (CAP) may have a shape corresponding to the coupling protrusions (HPT, see FIG. 12). For example, when viewed in a planar view, the housing coupling openings (CAP) may have a circular shape. The coupling protrusions (HPT, see FIG. 12) may be inserted into the housing coupling openings (CAP). Accordingly, the frame (RM) may be coupled to the hinge case (HCS, see FIG. 12).

[0176] The frame (FRM) may include a frame body (FBD), first guide projections (GPR1), and second guide projections (GPR2). Housing coupling openings (CAP) may be defined on the upper surface of the frame body (FPD). Coupling projections (HPT, see FIG. 12) may be inserted into the housing coupling openings (CAP).

[0177] The upper and lower surfaces of the portion adjacent to the side adjacent to the first rotor (RT1) among the two sides of the frame body (FBD) opposite each other in the first direction (DR1) may include curved surfaces. The two sides of the frame body (FBD) opposite each other in the second direction (DR2) may have a curved shape.

[0178] The first coupling groove (RGR1) may be defined on one of the two opposing sides of the frame body (FBD) in the first direction (DR1). The first coupling groove (RGR1) may extend in the first direction (DR1) from one of the two opposing sides of the frame body (FBD) toward the other side.

[0179] The second coupling groove (RGR2) may be defined on the other side of the two opposing sides of the frame (FRM) in the first direction (DR1). The second coupling groove (RGR2) may extend in the first direction (DR1) from the other side of the two opposing sides of the frame body (FBD) toward one side. The second coupling groove (RGR2) may be positioned above the first coupling groove (RGR1).

[0180] First guide projections (GPR1) may be disposed on first inner surfaces (IP1) of a frame body (FBD) defining a first coupling groove (RGR1). First guide projections (GPR1) may be disposed on first inner surfaces (IP1) facing each other. First guide projections (GPR1) may extend from the first inner surfaces (IP1) into a second direction (DR2). First guide projections (GPR1) may face each other in the second direction (DR2).

[0181] The first guide protrusions (GPR1) may have shapes corresponding to opposite sides of the frame body (FBD) in the second direction (DR2). The first guide protrusions (GPR1) may have a curved shape. The upper and lower surfaces of the first guide protrusions (GPR1) may have curved surfaces. The curvature of the upper and lower surfaces of the first guide protrusions (GPR1) may be the same as the curvature of the upper and lower surfaces of the frame body (FBD) having curved surfaces.

[0182] The second guide projections (GPR2) may be disposed on the second inner surfaces (IP2) of the frame body (FBD) defining the second coupling groove (RGR2). The second guide projections (GPR2) may be disposed on the second inner surfaces (IP2) facing each other. The second guide projections (GPR2) may extend from the second inner surfaces (IP2) into a second direction (DR2). The second guide projections (GPR2) may face each other in the second direction (DR2).

[0183] The second guide projections (GPR2) may have a curved shape. The upper and lower surfaces of the second guide projections (GPR2) may have curved surfaces.

[0184] The curvature of the upper surface of the first guide projections (GPR1) and the curvature of the upper surface of the second guide projections (GPR2) may differ from each other. The curvature of the upper surface of the first guide projections (GPR1) and the curvature of the upper surface of the second guide projections (GPR2) will be described in detail below.

[0185] The first rotor (RT1) may include a first body portion (BD1) and a first coupling portion (AP1). The upper surface of the first body portion (BD1) may include a flat surface (APL) and an inclined surface (SL) extending from the flat surface (APL) in a first direction (DR1). The flat surface (APL) may be parallel to a plane defined by the first direction (DR1) and the second direction (DR2). The first body portion (BD1) may be coupled to a first case (HS1, see FIG. 10). Although not illustrated, it may be coupled to the first case (HS1, see FIG. 10) by inserting fixing pins through first case openings (HOP1) defined in the flat surface (APL).

[0186] The height of the inclined surface (SL) may be lower than the height of the flat surface (APL). The height of the inclined surface (SL) may decrease as it moves further away from the flat surface (APL). The thickness of one of the two opposing sides of the first body part (BD1) in the first direction (DR1) may be smaller than the thickness of the other side. One of the two opposing sides of the first body part (BD1) in the first direction (DR1) may be defined as the side adjacent to the first joint part (AP1).

[0187] First sliding grooves (SGR1) may be defined on both sides of the first body part (BD1) opposite each other in the second direction (DR2). The first sliding grooves (SGR1) may extend in the first direction (DR1) from one side of the first body part (BD1) opposite each other toward the other side in the first direction (DR1).

[0188] The first connecting portion (AP1) may extend from the first body portion (BD1) in a first direction (DR1). The first connecting portion (AP1) may extend from one side of the first body portion (BD1). When viewed in a planar view, the width of the first connecting portion (AP1) in the second direction (DR2) may be smaller than the width of the first body portion (BD1) in the second direction (DR2). The first connecting portion (AP1) may have a curved shape. The upper surface of the first connecting portion (AP1) may have a curved surface.

[0189] The first guide grooves (GGR1) may be defined on opposite sides of the first coupling portion (AP1) in the second direction (DR2). The first guide grooves (GCR1) may extend in the first direction (DR1). The first guide grooves (GGR1) may have a curved shape.

[0190] The first rotor (RT1) can be coupled to the frame (FRM). The first rotor (RT1) can be placed within a first coupling groove (RGR1) defined in the frame body (FBD). The first rotor (RT1) can be coupled to the first guide projections (GPR1).

[0191] The first coupling portion (AP1) can be coupled to the first guide protrusions (GPR1). The first guide protrusions (GPR1) can be disposed within the first guide grooves (GGR1). The first guide grooves (GGR1) can have a shape corresponding to the first guide protrusions (GPR1).

[0192] Referring to FIGS. 14a and 14b, the first coupling part (AP1) can be rotated along the first guide projections (GPR1). The first coupling part (AP1) can be rotated around a first rotation axis (RX1) parallel to the second direction (DR2).

[0193] When the first coupling part (AP1) rotates around the first rotation axis (RX1), the first body part (BD1) connected to the first coupling part (AP1) can rotate around the first rotation axis (RX1). Although not illustrated, when the first body part (BD1) rotates around the first rotation axis (RX1), the first case (HS1, see FIG. 10) coupled to the first body part (BD1) can rotate around the first rotation axis (RX1). The rotation of the first case (HS1, see FIG. 10) will be described in detail below.

[0194] Referring to FIGS. 14a and 15, the first links (LK1) may include first link bodies (RTB1), a plurality of first sliding parts (SLP1), and a plurality of first protrusions (PTR1). The first link bodies (RTB1) may extend in a first direction (DR1). First shaft openings (ROP1) may be defined on one side of the first link bodies (RTB1) that are opposite each other in the first direction (DR1) and adjacent to the frame (FRM).

[0195] The first sliding parts (SLP1) may be positioned on opposite sides of the first link bodies (RTB1) in the second direction (DR2). The first sliding parts (SLP1) may be positioned adjacent to the other side of the first link bodies (RTB1) that is spaced apart from the frame (FRM) in the first direction (DR1). For example, when viewed from the second direction (DR2), the first sliding parts (SLP1) may have a circular shape.

[0196] The first protrusions (PTR1) may be positioned on one of the two sides of the first link bodies (RTB1) opposite each other in the first direction (DR1). The first protrusions (PTR1) may be arranged in a circular pattern. The first protrusions (PTR1) may surround a portion of the first shaft openings (ROP1).

[0197] The first links (LK1) may be positioned on opposite sides of the first rotor (RT1) in the second direction (DR2). The first rotor (RT1) may be positioned between the first links (LK1). The first links (LK1) may be positioned within the first sliding grooves (SGR1) defined on opposite sides of the first body part (BD1) in the second direction (DR2). The first sliding parts (SLP1) may be positioned within the first sliding grooves (SGR1).

[0198] The first links (LK1) may be positioned on opposite sides of the frame (FRM) in a second direction (DR2). The frame (FRM) may be positioned between the first links (LK1). The first shaft links (SF1) may be coupled to the frame (FRM) by passing through the first link bodies (RTB1). The first shaft links (SF1) may be coupled to the first shaft coupling grooves (SOP1) defined in the frame (FRM) by passing through the first shaft openings (ROP1).

[0199] The first link bodies (RTB1) can be rotated around the first shaft links (SF1). The first link bodies (RTB1) can be rotated around the first shaft links (SF1) on a plane defined by the first direction (DR1) and the third direction (DR3). When the first link bodies (RTB1) rotate around the first shaft links (SF1), the first sliding parts (SLP1) facing the first body part (BD1) among the first sliding parts (SLP1) can be moved along the first sliding grooves (SGR1).

[0201] FIG. 16a is a perspective view illustrating the combination of the frame and the second link. FIG. 16b is a cross-sectional view of the frame, the first link, and the second link corresponding to the line III-III' shown in FIG. 16a.

[0202] Among the components shown in FIG. 16a and FIG. 16b, the description of components identical to those described with reference to the aforementioned drawings will be omitted or simplified.

[0203] Referring to FIG. 13 and FIG. 16a, the second rotor (RT2) may include a second body portion (BD2) and a second coupling portion (AP2). A second case opening (HOP2) may be defined on the upper surface of the second body portion (BD2). The second case opening (HOP2) may be arranged in a second direction (DR2). The second body portion (BD2) may be coupled to a second case (HS2, see FIG. 10). Although not shown, fixing pins may penetrate the second case opening (HOP2) to be coupled to the second case (HS2, see FIG. 10).

[0204] Second sliding grooves (SGR2) may be defined on both sides of the second body part (BD2) that are opposite each other in the second direction (DR2). The second sliding grooves (SGR2) may extend in the first direction (DR1) from one side adjacent to the frame (FRM) to the other side of the two sides of the second body part (BD2) that are opposite each other in the first direction (DR1).

[0205] The second connecting portion (AP2) may extend from the second body portion (BD2) in the first direction (DR1). The second connecting portion (AP2) may extend in the first direction (DR1) from one of the two opposite sides of the second body portion (BD2) in the first direction (DR1). When viewed in a planar view, the width of the second connecting portion (AP2) in the second direction (DR2) may be smaller than the width of the second body portion (BD2) in the second direction (DR2).

[0206] The second rotor (RT2) can be coupled to the frame (FRM). The second rotor (RT2) can be placed within the second coupling groove (RGR2). The second rotor (RT2) can be placed within the second coupling groove (RGR2) defined in the frame body (FBD). The second rotor (RT2) can be coupled to the second guide projections (GPR2).

[0207] The second coupling portion (AP2) can be coupled to the second guide protrusions (GPR2). The second guide protrusions (GPR2) can be disposed within the second guide grooves (GGR2). The second guide grooves (GGR2) can have a shape corresponding to the second guide protrusions (GPR2).

[0208] Referring to FIGS. 16a and 16b, the second coupling part (AP2) can be rotated along the second guide projections (GPR2). The second coupling part (AP2) can be rotated around a second rotation axis (RX2) parallel to the second direction (DR2).

[0209] When the second coupling part (AP2) rotates around the second rotation axis (RX2), the second body part (BD2) connected to the second coupling part (AP2) can rotate around the second rotation axis (RX2). Although not illustrated, when the second body part (BD2) rotates around the second rotation axis (RX2), the second case (HS2, see FIG. 10) connected to the second body part (BD2) can rotate around the second rotation axis (RX2).

[0210] The rotation radius of the first rotor (RT1) and the rotation radius of the second rotor (RT2) may be different from each other. The rotation radius of the first rotor (RT1) may be larger than the rotation radius of the second rotor (RT2). When viewed from the second direction (DR2), the rotation radius of the first rotor (RT1) may be defined as the maximum distance from the upper surface of the first rotor (RT1) to the first rotation axis (RX1). When viewed from the second direction (DR2), the rotation radius of the second rotor (RT2) may be defined as the maximum distance from the upper surface of the second rotor (RT2) to the second rotation axis (RX2).

[0211] As the rotation radius of the first rotor (RT1) is larger than the rotation radius of the second rotor (RT2), when the electronic device (ED, see FIG. 1) is folded, the volume of the space defined between the first rotor (RT1) and the frame (FRM) may be larger than the volume of the space defined between the second rotor (RT2) and the frame (FRM). Accordingly, even if the folding area (FA, see FIG. 9a) of the display device (DD, see FIG. 9a) is folded in an asymmetrical shape, it may not interfere with the hinge portion (HGP). The folding shape of the display device (DD, see FIG. 9a) will be described in detail below.

[0213] FIG. 17 is a perspective view illustrating the combination of a frame, a second rotor, and second links.

[0214] Among the components shown in FIG. 17, the description of components identical to those described with reference to the aforementioned drawings will be omitted or simplified.

[0215] Referring to FIGS. 16a and 17, the second links (LK2) may include second link bodies (RTB2), a plurality of second sliding parts (SLP2), and a plurality of second protrusions (PTR2). The second link bodies (RTB2) may extend in a first direction (DR1). Second shaft openings (ROP2) may be defined on one side of the first link bodies (RTB1) that are opposite each other in the first direction (DR1) and adjacent to the frame (FRM).

[0216] The second sliding parts (SLP2) may be positioned on opposite sides of the second link bodies (RTB2) in the second direction (DR2). The second sliding parts (SLP2) may be positioned adjacent to the other side of the opposite sides of the second link bodies (RTB2) in the first direction (DR1) that is spaced apart from the frame (FRM). For example, when viewed from the second direction (DR2), the second sliding parts (SLP2) may have a circular shape.

[0217] The second protrusions (PTR2) may be positioned on one side of the two sides of the second link bodies (RTB2) opposite each other in the first direction (DR1). The second protrusions (PTR2) may be arranged in a circular pattern. The second protrusions (PTR2) may surround a portion of the second shaft openings (ROP2).

[0218] The second links (LK2) may be positioned on opposite sides of the second rotor (RT2) in the second direction (DR2). The second rotor (RT2) may be positioned between the second links (LK2). The second links (LK2) may be positioned within the second sliding grooves (SGR2) defined on opposite sides of the second body part (BD2) in the second direction (DR2). The second sliding parts (SLP2) may be positioned within the second sliding grooves (SGR2).

[0219] The second links (LK2) may be positioned on opposite sides of the frame (FRM) in the second direction (DR2). The frame (FRM) may be positioned between the second links (LK2). The second shaft links (SF2) may be coupled to the frame (FRM) by passing through the second link bodies (RTB2). The second shaft links (SF2) may be coupled to the second shaft coupling grooves (SOP2) defined in the frame (FRM) by passing through the second shaft openings (ROP2).

[0220] The second link bodies (RTB2) can be rotated around the second shaft links (SF2). The second link bodies (RTB2) can be rotated around the second shaft links (SF2) on a plane defined by the first direction (DR1) and the third direction (DR3). When the second link bodies (RTB2) rotate around the second shaft links (SF2), the second sliding parts (SLP2) facing the second body part (BD2) among the second sliding parts (SLP2) can be moved along the second sliding grooves (SGR2).

[0222] FIG. 18a is a perspective view illustrating the combination of a frame, connecting gears, caps, springs, and spring pins. FIG. 18b is a cross-sectional view of the second links and connecting gears corresponding to the line IV-IV' shown in FIG. 18a.

[0223] Among the components shown in FIG. 18a and FIG. 18b, the description of components identical to those described with reference to the aforementioned drawings will be omitted or simplified.

[0224] Referring to FIG. 13, FIG. 18a, and FIG. 18b, the insertion openings (GOP) of FIG. 13 may be defined on both sides of the frame body (FBD) opposite each other in the second direction (DR2). In FIG. 13, only one side of the frame body (FBD) is shown, but insertion openings (GOP) may also be defined on the other side of the frame body (FBD) opposite to the one side in the second direction (DR2).

[0225] Insertion openings (GOP) may be defined below the first and second shaft coupling grooves (SOP1, SOP2). Insertion openings (GOP) may be arranged in shapes corresponding to opposite sides of the frame body (FBD) in the second direction (DR2). Insertion openings (GOP) may be arranged in a curved shape.

[0226] The number of connecting gears (CGR) can be an even number. For example, in FIG. 18a and FIG. 18b, four connecting gears (CGR) are shown, but the number of connecting gears (CGR) is not limited.

[0227] The connecting gears (CGR) can mesh with each other and rotate together around a rotation axis parallel to the second direction (DR2). The rotation directions of adjacent connecting gears (CGR) can be opposite to each other.

[0228] Connecting gears (CGR) may be positioned on opposite sides of the frame (FRM) in the second direction (DR2). Connecting gears (CGR) may be positioned adjacent to insertion openings (GOP) defined on opposite sides of the frame (FRM) in the second direction (DR2). Each connecting gear (CGR) may be adjacent to a corresponding insertion opening (GOP) among the insertion openings (GOP).

[0229] The connecting gears (CGR) can be arranged to correspond to the insertion openings (GOP). The connecting gears (CGR) can be arranged in a curved shape. As shown in FIG. 18b, when viewed from the second direction (DR2), the centerline (GCT), defined as an imaginary line connecting the centers of the connecting gears (CGR), can be curved. The curvature of the centerline (GCT) can be the same as the curvature of the upper and lower surfaces of the frame body (FBD). The curvature of the centerline (GCT) can be the same as the curvature of the first guide projections (GPR1) shown in FIG. 13.

[0230] As the connecting gears (CGR) are arranged in a curved shape, the folding region (FA, see FIG. 9a) may be folded in an asymmetrical shape and have a curved surface, so that the folding region (FA, see FIG. 9a) and the connecting gears (CGR) may not interfere with each other. The folding shape of the folding region (FA, see FIG. 9a) will be described in detail below.

[0231] Connecting gears (CGR) may be positioned between the first protrusions (PTR1) and the second protrusions (PTR2). Among the connecting gears (CGR), the connecting gears (CGR) adjacent to the first links (LK1) may mesh with the first protrusions (PTR1) and rotate together. At least one of the first protrusions (PTR1) may mesh with an adjacent connecting gear (CGR) among the connecting gears (CGR). When the electronic device (ED, see FIG. 1) is moved from a folded state to an unfolded state, or from an unfolded state to a folded state, the first protrusions (PTR1) may mesh sequentially with the adjacent connecting gears (CGR) in a counterclockwise order. The rotational direction of the connecting gears (CGR) meshed with the first protrusions (PTR1) among the connecting gears (CGR) and the first links (LK1) may be opposite.

[0232] Among the connecting gears (CGR), the connecting gears (CGR) adjacent to the second links (LK2) can rotate together by engaging with the second protrusions (PTR2). At least one of the second protrusions (PTR2) can engage with an adjacent connecting gear (CGR) among the connecting gears (CGR). When the electronic device (ED, see FIG. 1) is moved from a folded state to an unfolded state, or from an unfolded state to a folded state, the second protrusions (PTR2) can engage sequentially with the adjacent connecting gears (CGR) in a counterclockwise order. The direction of rotation of the connecting gears (CGR) engaged with the second protrusions (PTR2) among the connecting gears (CGR) and the second links (LK2) may be opposite.

[0233] The first links (LK1) and the second links (LK2) can be connected to each other by connecting gears (CGR). When the first links (LK1) rotate, the second links (LK2) can rotate. Specifically, when the first links (LK1) rotate around the first shaft links (SF1), the connecting gears (CGR) can rotate around a rotation axis parallel to the second direction (DR2). When the connecting gears (CGR) rotate, the second links (LK2) can rotate around the second shaft links (SF2).

[0234] The rotational direction of the first links (LK1) and the rotational direction of the second links (LK2) may be opposite to each other. For example, when the first links (LK1) rotate clockwise, the second links (LK2) may rotate counterclockwise. Accordingly, when the electronic device (ED, see FIG. 1) is moved from an unfolded state to a folded state, the first links (LK1) and the second links (LK2) may face each other. When the electronic device (ED, see FIG. 1) is moved from a folded state to an unfolded state, the first links (LK1) and the second links (LK2) may not face each other.

[0235] The number of first protrusions (PTR1) may be smaller than the number of second protrusions (PTR2). For example, in FIG. 18b, the number of first protrusions (PTR1) is 7 and the number of second protrusions (PTR2) is 10. However, the number of first protrusions (PTR1) and the number of second protrusions (PTR2) are not limited thereto.

[0236] When the electronic device (ED, see FIG. 1) is in an unfolded state and then in a folded state, the rotation angle of the first links (LK1) and the rotation angle of the second links (LK2) may be different from each other. The rotation angle of the first links (LK1) may be greater than the rotation angle of the second links (LK2). The rotation angle of the first links (LK1) and the rotation angle of the second links (LK2) will be described in detail below.

[0237] Cams (CAM) may be positioned on one side of the opposite connecting gears (CGR) in the second direction (DR2) that is spaced apart from the frame (FRM). Pin openings (NOP) may be defined in the cams (CAM). Pin openings (NOP) may extend in the second direction (DR2). Pin openings (NOP) may extend from one side of the opposite cams (CAM) in the second direction (DR2) that is spaced apart from the connecting gears (CGR) to the other side.

[0238] The pin openings (NOP) can be arranged to correspond to the connecting gears (CGR). The pin openings (NOP) can be arranged in a curved shape.

[0239] Springs (SPR) may be adjacent to one side of opposite cams (CAM) in the second direction (DR2). Each spring (SPR) may be positioned adjacent to a corresponding pin opening (NOP) among the pin openings (NOP).

[0240] Spring pins (PNS) may extend in a second direction (DR2). Each spring pin (PNS) may pass through a corresponding spring (SPR) among the springs (SPR), a corresponding pin opening (NOP) among the pin openings (NOP), and a corresponding connecting gear (CGR) among the connecting gears (CGR), and be coupled to a corresponding insertion opening (GOP) among the insertion openings (GOP). The springs (SPR), cams (CAM), and connecting gears (CGR) may be connected to the frame (FRM) by the spring pins (PNS).

[0242] FIG. 19 is a perspective view illustrating the connection between the hinge portions and the first and second cases. FIG. 20a is a cross-sectional view of the hinge module (EDC) corresponding to the line V-V' shown in FIG. 19. FIG. 20b is a cross-sectional view showing the hinge module (EDC) shown in FIG. 20a in a folded state.

[0243] For convenience of explanation, the display device (DD, see FIG. 3) and the cover plate (SPT, see FIG. 10) in FIG. 19 have been omitted. Also, in FIG. 20a and FIG. 20b, the display device (DD) is briefly depicted as a single layer.

[0244] For example, in FIG. 20b, the first rotor (RT1) and the second rotor (RT2) in the unfolded state are shown with dashed lines.

[0245] Among the components shown in FIGS. 19 to 20b, the description of components identical to those described with reference to the aforementioned drawings will be omitted or simplified.

[0246] Referring to FIGS. 19, FIG. 20a, and FIG. 20b, hinge portions (HGP) can be coupled to a hinge case (HCS). A first case (HS1) and a second case (HS2) can be coupled to hinge portions (HGP). Hinge portions (HGP) can be positioned between the first case (HS1) and the second case (HS2).

[0247] The user can fold the electronic device (ED) so that the first case (HS1) and the second case (HS2) face each other. The user can apply force to the first case (HS1) and the second case (HS2) to rotate the first case (HS1) and the second case (HS2) on a plane defined by the first direction (DR1) and the third direction (DR3). The first case (HS1) and the second case (HS2) can be rotated at the same angle.

[0248] When the first case (HS1) and the second case (HS2) rotate, the first rotors (RT1) connected to the first case (HS1) can rotate around the first rotation axis (RX1). The second rotors (RT2) connected to the second case (HS2) can rotate around the second rotation axis (RX2).

[0249] The first angle (θ1), defined as the rotation angle of the first rotor (RT1), and the second angle (θ2), defined as the rotation angle of the second rotor (RT2), may have the same magnitude. The flat surface (APL) of the first rotor (RT1) and the upper surface of the second rotor (RT2) may be parallel to each other in the first direction (DR1).

[0250] When the first rotor (RT1) and the second rotor (RT2) rotate, the first cover plate (SPT1) and the second cover plate (SPT2) placed on the first rotor (RT1) and the second rotor (RT2) may face each other. The first cover plate (SPT1) and the second cover plate (SPT2) may be parallel to each other in the first direction (DR1).

[0251] When the first rotor (RT1) and the second rotor (RT2) rotate, the wing plate (WPT) can be rotated about a rotation axis parallel to the second direction (DR2) with respect to the first cover plate (SPT1). The wing plate (WPT) can be rotated and positioned on the inclined surface (SL) of the first rotor (RT1).

[0252] When the hinge module (EDC) is folded, the folding area (FA) is bent so that the display device (DD) can be folded. The folding area (FA) can be rotated around a two-axis rotation axis so that the first non-folding area (NFA1) and the second non-folding area (NFA2) can be folded to face each other. The first non-folding area (NFA1) and the second non-folding area (NFA2) can be parallel to the third direction (DR3).

[0253] The folding region (FA) may overlap with the hinge portion (HGP). The folding region (FA) may include a curved portion (CSP) and an inverse curvature portion (ICV). The inverse curvature portion (ICV) may extend in the first direction (DR1) from one side adjacent to the first rotor (RT1) among the two sides of the curved portion (CSP) that are opposite to each other in the first direction (DR1). The inverse curvature portion (ICV) may be positioned between the curved portion (CSP) and the first non-folding region (NFA1). The inverse curvature portion (ICV) may overlap with the wing plate (WPT).

[0254] The curved surface (CSP) can be bent into a curved shape when the display device (DD) is folded. The curved surface (CSP) can be bent to have a predetermined curvature. The wing plate (WPT) can support the inverse curvature portion (ICV). The inverse curvature portion (ICV) can be bent in the opposite direction to the curved surface (CSP) by the wing plate (WPT). The curvature of the inverse curvature portion (ICV) may be different from the curvature of the curved surface (CSP).

[0255] According to the folding structure described above, when the display device (DD) is folded, the folding regions (FA) that are opposite to each other in the first direction (DR1) may be asymmetrical, with one side adjacent to the first rotor (RT1) and the other side adjacent to the second rotor (RT2). One side of the folding region (FA) adjacent to the first rotor (RT1) may include a reverse curvature portion. The other side of the folding region (FA) adjacent to the second rotor (RT2) may not include a reverse curvature portion.

[0256] When the display device (DD) is folded and one side and the other side of the folding area (FA) include an inverse curvature portion (ICV), the volume of the space occupied by the folding area (FA) may be large. Accordingly, in order to prevent the display device (DD) and the hinge portion (HGP) from interfering with each other, the volume of the receiving grooves (AGR, see FIG. 10) may be increased. Accordingly, the thickness of the first and second cases (HS1, HS2) may be increased.

[0257] However, according to one embodiment of the present invention, one side and the other side of the folding region (FA) may be asymmetrical due to the hinge portion (HGP). The other side of the folding region (FA) may not include an inverse curvature portion (ICV). The space occupied by the portion of the folding region (FA) adjacent to the second rotor (RT2) may be reduced. Accordingly, the volume of the receiving groove (AGR, see FIG. 10) defined by the second case (HS2) is reduced, and the thickness of the second case (HS2) may be reduced. The thickness of the second case (HS2) may be smaller than the thickness of the first case (HS1). Thus, the overall thickness of the electronic device (ED) may be reduced.

[0258] In addition, as the radius of rotation of the first rotor (RT1) is larger than the radius of rotation of the second rotor (RT2), interference between the first rotor (RT1) and the folding area (FA) can be prevented. In addition, as the connecting gears (CGR) are arranged in a curved shape, interference between the folding area (FA) and the connecting gears (CGR) can be prevented.

[0260] FIGS. 21a and FIGS. 21b are cross-sectional views illustrating the rotation of the first link and the second link.

[0261] For example, in FIG. 21a and FIG. 21b, the display device (DD) is briefly illustrated as a single layer.

[0262] For example, in FIG. 21b, the first link (LK1) and the second link (LK2) in the unfolded state are shown as dashed lines.

[0263] Referring to FIGS. 21a and 21b, when the first rotor (RT1) rotates around the first rotation axis (RX1), the first link (LK1) connected to the first rotor (RT1) can rotate around the first shaft link (SF1). When the first link (LK1) rotates, the first sliding part (SLP1) can move along the first sliding groove (SGR1).

[0264] When the second rotor (RT2) rotates around the second rotation axis (RX2), the second link (LK2) connected to the second rotor (RT2) can rotate around the second shaft link (SF2). When the second link (LK2) rotates, the second sliding part (SLP2) can move along the second sliding groove (SGR2).

[0265] The number of first protrusions (PTR1) may be smaller than the number of second protrusions (PTR2). For example, the number of first protrusions (PTR1) is 7 and the number of second protrusions (PTR2) is 10. However, this is exemplary and the number of first protrusions (PTR1) and second protrusions (PTR2) is not limited thereto. As the number of first protrusions (PTR1) is smaller than the number of second protrusions (PTR2), the third angle (θ3), defined as the rotation angle of the first link (LK1), may be larger than the fourth angle (θ4), defined as the rotation angle of the second link (LK2).

[0266] When the electronic device (ED) is in an unfolded state, the upper surface of the first link (LK1) and the upper surface of the second link (LK2) may be parallel to a plane defined by the first direction (DR1) and the second direction (DR2). When the electronic device (ED) is in a folded state, the upper surface of the second link (LK2) may be parallel to a plane defined by the second direction (DR2) and the third direction (DR3). When the electronic device (ED) is in a folded state, the upper surface of the first link (LK1) may be parallel to the lower surface of the wing plate (WPT). The upper surface of the first link (LK1) may be parallel to an inclined surface (SL).

[0267] Accordingly, the wing plate (WPT) can support the folding region (FA), and one side of the folding region (FA) can form an inverse curvature portion (ICV). Thus, the folding region (FA) can be folded asymmetrically.

[0268] Although the invention has been described with reference to the above embodiments, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as set forth in the following claims. Furthermore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the invention, and all technical spirits within the scope of the following claims and equivalents should be interpreted as being included within the scope of the rights of the present invention. Explanation of the symbols

[0270] ED: Electronic device DD: Display device WM: Window Module DM: Display Module EDC: Hinge Module HS1, HS2: First and second cases HCS: Hinge Case HGP: Hinge part RT1: 1st Rotor RT2: 2nd Rotor LK1: First link LK2: Second link FRM: Frame CGR: Connecting gears

Claims

Claim 1 A display module comprising a first non-folding area arranged in a first direction, a second non-folding area, and a folding area disposed between the first and second non-folding areas; a case comprising a first case overlapping the first non-folding area and a second case overlapping the second non-folding area; and a hinge portion disposed between the first case and the second case and defining biaxial rotation axes extending parallel to a second direction intersecting the first direction, wherein the hinge portion comprises: a frame disposed between the first case and the second case; a first rotor disposed between the first case and the frame; a first link coupled to at least one of the two sides of the first rotor opposite each other in the second direction and comprising first protrusions disposed on one side adjacent to the frame; a second rotor disposed between the second case and the frame; and a second link coupled to at least one of the two sides of the second rotor opposite each other in the second direction and comprising second protrusions disposed on one side adjacent to the frame. An electronic device comprising a plurality of connecting gears engaged with at least one first protrusion among the first protrusions and at least one second protrusion among the second protrusions, wherein the number of the first protrusions and the number of the second protrusions are different from each other. Claim 2 An electronic device according to claim 1, wherein when the display module is folded, the first case and the second case rotate around the biaxial rotation axis to face each other, and the rotation angle of the first rotor coupled to the first case and the rotation angle of the second rotor coupled to the second case are the same. Claim 3 An electronic device in which, when the display module is folded, the rotation angle of the first link is greater than the rotation angle of the second link. Claim 4 An electronic device according to claim 3, wherein the number of the first protrusions is smaller than the number of the second protrusions. Claim 5 An electronic device according to claim 4, wherein the first rotor comprises a first body portion coupled to the first case; and a first coupling portion extending from the first body portion in the first direction and disposed in a first coupling groove defined in the frame, and the second rotor comprises a second body portion coupled to the second case; and a second coupling portion extending from the second body portion in the first direction and disposed in a second coupling groove defined in the frame. Claim 6 An electronic device according to claim 5, wherein the frame comprises: a frame body; a plurality of first guide protrusions having a curved shape disposed on first inner surfaces of the frame body defining the first coupling groove; and a plurality of second guide protrusions having a curved shape disposed on second inner surfaces of the frame body defining the second coupling groove, wherein the first guide protrusions are disposed in first guide grooves defined on both sides of the first coupling portion opposite each other in the second direction, and the second guide protrusions are disposed in second guide grooves defined on both sides of the second coupling portion opposite each other in the second direction, and the curvature of the first guide protrusions is smaller than the curvature of the second guide protrusions. Claim 7 In claim 6, the connecting gears are provided in an even number, the connecting gears are arranged in a curved shape, and the curvature of the imaginary curve connecting the centers of the connecting gears is the same as the curvature of the protrusions of the first guide. Claim 8 An electronic device according to claim 4, wherein the first link comprises a first sliding portion disposed on one side adjacent to the first rotor, and the second link comprises a second sliding portion disposed on one side facing the second rotor, wherein the first sliding portion is disposed in first sliding grooves defined on one side of the first rotor facing the first link, and the second sliding portion is disposed in second sliding grooves defined on one side of the second rotor facing the second link. Claim 9 In claim 3, when the display module is folded, the folding area is an electronic device that folds asymmetrically. Claim 10 An electronic device according to claim 9, wherein when the folding region is folded, a portion of the folding region adjacent to the first non-folding region includes a reverse curvature portion, and another portion of the folding region adjacent to the second non-folding region does not include a reverse curvature portion. Claim 11 In claim 9, an electronic device in which the thickness of the first case is greater than the thickness of the second case. Claim 12 A display module comprising a first non-folding area arranged in a first direction, a second non-folding area, and a folding area disposed between the first and second non-folding areas; a case comprising a first case overlapping the first non-folding area and a second case overlapping the second non-folding area; and a hinge portion disposed between the first case and the second case and defining biaxial rotation axes extending parallel to a second direction intersecting the first direction, wherein the hinge portion comprises: a frame disposed between the first case and the second case; a first hinge comprising a first rotor coupled to one side adjacent to the first case among the two sides of the frame opposite each other in the first direction; and a first link coupled to at least one side of the first rotor opposite each other in the second direction; a second hinge comprising a second rotor coupled to the other side adjacent to the second case among the two sides of the frame opposite each other in the first direction; and a second link coupled to at least one side of the second rotor opposite each other in the second direction. An electronic device comprising at least one connecting gear disposed between the first hinge and the second hinge and connecting the first link and the second link to each other, wherein when the display module is folded, the first case and the second case rotate around the biaxial rotation axis to face each other, and the rotation angle of the first link is greater than the rotation angle of the second link. Claim 13 In claim 12, when the display module is folded, the rotation angle of the first rotor and the rotation angle of the second rotor are the same electronic device. Claim 14 An electronic device according to claim 13, wherein the first link comprises a plurality of first protrusions disposed on one side adjacent to the frame, and the second link comprises a plurality of second protrusions disposed on one side adjacent to the frame, and the number of the first protrusions is smaller than the number of the second protrusions. Claim 15 In claim 14, an electronic device in which the rotation radius of the first rotor is larger than the rotation radius of the second rotor. Claim 16 An electronic device according to claim 14, wherein when the display module is folded, the folding region is folded asymmetrically, and the curvature of the portion of the folding region adjacent to the first non-folding region is greater than the curvature of the portion of the folding region adjacent to the second non-folding region. Claim 17 In claim 16, an electronic device in which the thickness of the first case is greater than the thickness of the second case. Claim 18 An electronic device according to claim 12, wherein the frame comprises: first guide protrusions having a curved shape disposed on the inner surfaces of a first coupling groove to which the first rotor is coupled; and second guide protrusions having a curved shape disposed on the inner surfaces of a second coupling groove to which the second rotor is coupled, wherein the curvature of the first guide protrusions is smaller than the curvature of the second guide protrusions. Claim 19 An electronic device according to claim 18, wherein the first rotor comprises a first body portion coupled to the first case; and a first coupling portion extending from the first body portion in the first direction and disposed in a first coupling groove defined in the frame, and the second rotor comprises a second body portion coupled to the second case; and a second coupling portion extending from the second body portion in the first direction and disposed in a second coupling groove defined in the frame, wherein the first guide protrusions are disposed in first guide grooves defined on both sides of the first coupling portion opposite each other in the second direction, and the second guide protrusions are disposed in second guide grooves defined on both sides of the second coupling portion opposite each other in the second direction. Claim 20 In claim 18, the connecting gears are provided in plurality, the connecting gears are arranged in a curved shape, and the curvature of the imaginary curve connecting the centers of the connecting gears is the same as the curvature of the protrusions of the first guide.

Images