Flexible display module and electronic device including the same

Abstract

A flexible display module and an electronic device including the same are provided. The electronic device includes a housing, a display, an interposer, an adhesive layer, a support layer, and a coating layer. The housing includes a front plate facing in one direction, a rear plate facing in an opposite direction, and a side member surrounding a space between the front plate and the rear plate. The display is configured to be visible through the front plate and includes a first surface and a second surface. The interposer is disposed between the display and the rear plate and includes a surface facing the display and a recess. The adhesive layer is attached to the display, and the support layer is disposed between the adhesive layer and the interposer. The coating layer is disposed between the support layer and the adhesive layer and is disposed in a first portion overlapping the recess when viewed from the display.

Description

[0001] This application is a divisional application of the invention patent application filed with the China National Intellectual Property Administration on December 23, 2019, with application number 201980085566.X, entitled "Flexible Display Module and Electronic Device Including the Flexible Display Module". Technical Field

[0002] This disclosure relates to a flexible display module and an electronic device including the flexible display module. Background Technology

[0003] Typically, electronic devices feature displays that visually provide information to users. With the development of electronic devices, these displays have been developed and improved in various aspects. For example, resolution has become higher to achieve enhanced image quality, and thickness has become thinner to reduce power consumption. In recent years, flexible displays that allow the shape to change according to the shape of the electronic device have been researched and developed. Summary of the Invention

[0004] Technical issues

[0005] In flexible displays, a support layer is attached over the entire area of ​​the display to support it. Therefore, when the support layer deforms under external force, the deformed shape can be transferred to the window surface of the display. Additionally, surface irregularities of the intermediate plate in the display (e.g., thickness variations) may be exposed on the window surface.

[0006] Technical solution

[0007] According to one aspect of this disclosure, an electronic device is provided. The electronic device includes: a housing including a front panel facing a first direction, a rear panel facing a second direction opposite to the first direction, and side members surrounding a space between the front and rear panels; a display configured to be visible through at least a portion of the front panel and including a first surface facing the first direction and a second surface facing the second direction; an intermediate panel disposed between the display and the rear panel, including a third surface facing the second surface of the display and a recess formed on the third surface; an adhesive layer attached to the second surface of the display; a support layer disposed between the adhesive layer and the intermediate panel; and a coating disposed between the support layer and the adhesive layer, and disposed in a first portion overlapping the recess when viewed from the display.

[0008] According to another aspect of this disclosure, an electronic device is provided. The electronic device includes: a housing including a front panel facing a first direction, a rear panel facing a second direction opposite to the first direction, and side members surrounding a space between the front panel and the rear panel; a display configured to be visible through at least a portion of the front panel and including a first surface facing the first direction and a second surface facing the second direction; an intermediate panel disposed between the display and the rear panel, including a third surface facing the second surface of the display and a recess formed on the third surface; an adhesive layer attached to the second surface of the display and including an opening formed in a first portion that overlaps with the recess when viewed from the display; and a support layer disposed between the adhesive layer and the intermediate panel.

[0009] According to another aspect of this disclosure, a flexible display module is provided. The flexible display module includes: a front panel facing a first direction and configured to be foldable; a display configured to be visible through at least a portion of the front panel and including a first surface facing the first direction and a second surface facing a second direction opposite to the first direction; an adhesive layer attached to the second surface of the display; a support layer combined with the adhesive layer; and a coating disposed between at least a portion of the support layer and the adhesive layer.

[0010] Beneficial effects of the present invention

[0011] According to one aspect of this disclosure, even when the support layer attached to the display is deformed due to external force, the electronic device can prevent the deformed shape from appearing on the window surface of the display. Attached Figure Description

[0012] Figure 1 This is a diagram showing the unfolded state of an electronic device according to an embodiment of the present disclosure;

[0013] Figure 2 This is a diagram showing the folded state of an electronic device according to an embodiment of the present disclosure;

[0014] Figure 3 This is an exploded perspective view of an electronic device according to an embodiment of the present disclosure;

[0015] Figure 4 This is an exploded perspective view of an electronic device according to an embodiment of the present disclosure;

[0016] Figure 5 This is a diagram showing a flexible display module as seen from the direction of the second surface of the display according to an embodiment of the present disclosure;

[0017] Figure 6 This is a perspective view showing a recess in an electronic device according to an embodiment of the present disclosure;

[0018] Figure 7Aand Figure 7B This is a cross-sectional view illustrating an electronic device according to various embodiments of the present disclosure;

[0019] Figure 8A and Figure 8B This is a cross-sectional view illustrating an electronic device including a support plate according to various embodiments of the present disclosure;

[0020] Figure 9 This is a cross-sectional view showing a recess with modified edges in an electronic device according to an embodiment of the present disclosure;

[0021] Figure 10 This is an exploded perspective view of an electronic device according to an embodiment of the present disclosure;

[0022] Figure 11 This is a cross-sectional view of an electronic device according to an embodiment of the present disclosure;

[0023] Figure 12 This is an exploded perspective view of an electronic device according to embodiments of the present disclosure; and

[0024] Figure 13 This is a cross-sectional view of an electronic device according to an embodiment of the present disclosure. Detailed Implementation

[0025] The following description, provided with reference to the accompanying drawings, is intended to aid in a full understanding of the various embodiments of this disclosure as defined by the claims and their equivalents. It includes various specific details to aid understanding, but these details are to be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of this disclosure. Furthermore, for clarity and brevity, descriptions of well-known functions and structures may be omitted.

[0026] The terms and words used in the following description and claims are not limited to their literal meaning, but are used only to enable a clear and consistent understanding of this disclosure. Therefore, it will be apparent to those skilled in the art that the following description providing various embodiments of this disclosure is for illustrative purposes only and is not intended to limit the purpose of this disclosure as defined by the appended claims and their equivalents.

[0027] It should be understood that, unless the context clearly specifies otherwise, the singular forms “a,” “an,” and “the” include plural indicators. Thus, for example, a reference to “component surface” includes a reference to one or more such surfaces.

[0028] Figure 1 This is a diagram showing the unfolded state of an electronic device according to an embodiment of the present disclosure.

[0029] Figure 2This is a diagram showing the folded state of an electronic device according to an embodiment of the present disclosure.

[0030] Reference Figure 1 and Figure 2 The electronic device 10 may include a foldable housing 500, a hinged cover 530 covering a foldable portion of the foldable housing 500, and a flexible or foldable display 100 (hereinafter referred to as "display 100") disposed in the space defined by the foldable housing 500. In this disclosure, the surface on which the display 100 is disposed is defined, for example, as a first surface or front surface of the electronic device 10. Additionally, the surface opposite to the front surface is defined, for example, as a second surface or rear surface of the electronic device 10. Furthermore, the surface surrounding the space between the front and rear surfaces is defined, for example, as a third surface or side surface of the electronic device 10.

[0031] In an embodiment, the foldable housing 500 may include a first housing structure (e.g., a first housing) 510, a second housing structure (e.g., a second housing) 520 including a sensor region 524, a first rear cover 580, and a second rear cover 590. The foldable housing 500 of the electronic device 10 is not limited to... Figure 1 and Figure 2 The shapes and combinations shown can be achieved by combining and / or joining other shapes or components. For example, but not limited to, in another embodiment, the first housing 510 and the first rear cover 580 can be integrally formed, and the second housing 520 and the second rear cover 590 can also be integrally formed.

[0032] In the illustrated embodiment, the first housing 510 and the second housing 520 may be arranged on opposite sides relative to a folding axis (denoted by 'A') and may have a generally symmetrical shape relative to the folding axis (A). As will be described later, the first housing 510 and the second housing 520 may have different angles or distances between them depending on whether the electronic device 10 is in a flat state (e.g., unfolded state), a folded state, or an intermediate state. In the illustrated embodiment, the second housing 520 may have a sensor region 524 in which various sensors are arranged. Apart from the specification of the sensor region 524, the two housings may have a generally symmetrical shape.

[0033] In an embodiment, such as Figure 1 As shown, the first housing 510 and the second housing 520 may together include a recess for accommodating the display 100. In the illustrated embodiment, due to the sensor region 524, the recess may have two or more different widths in a direction perpendicular to the folding axis (A).

[0034] For example, the recess may have a first width (W1) between a first portion 510a of the first housing 510 parallel to the folding axis (A) and a first portion 520a of the second housing 520 formed at one edge of the sensor region 524, and a second width (W2) between a second portion 510b of the first housing 510 parallel to the folding axis (A) and a second portion 520b of the second housing 520 parallel to the folding axis (A) but not corresponding to the sensor region 524. In this example, the second width (W2) may be longer than the first width (W1). In other words, the first portion 510a of the first housing 510 and the first portion 520a of the second housing 520, which have asymmetrical shapes, define the first width (W1) of the recess, while the second portion 510b of the first housing 510 and the second portion 520b of the second housing 520, which have symmetrical shapes, define the second width (W2) of the recess. In embodiments, the first portion 520a and the second portion 520b of the second housing 520 may have different distances from the folding axis (A). The width of the recess is not limited to the example shown. In various embodiments, the recess may have multiple different widths depending on the shape of the sensor region 524 or the asymmetrical shape of the first housing 510 and the second housing 520.

[0035] In an embodiment, at least a portion of the first housing 510 and the second housing 520 may include a metallic or non-metallic material having a hardness value selected to support the display 100.

[0036] In embodiments, sensor region 524 may occupy a specific area adjacent to a corner of the second housing 520. The arrangement, shape, and size of sensor region 524 are not limited to the examples shown. For example, in other embodiments, sensor region 524 may be located at any other corner of the second housing 520 or in any area between an upper and lower corner. In embodiments, components for performing various functions may be embedded in the electronic device 10 and exposed to the front surface of the electronic device 10 through sensor region 524 or through one or more openings provided in sensor region 524. In various embodiments, these components may include various types of sensors, wherein the sensors may include, for example, but not limited to, at least one of a front-facing camera, a receiver, and a proximity sensor.

[0037] A first rear cover 580 may be disposed on one side of the folding axis on the rear surface of the electronic device 10. The first rear cover 580 may have a generally rectangular periphery that is enclosed by a first housing 510. Similarly, a second rear cover 590 may be disposed on the other side of the folding axis on the rear surface of the electronic device, and the generally rectangular periphery of the second rear cover 590 may be enclosed by a second housing 520.

[0038] In the illustrated embodiment, the first rear cover 580 and the second rear cover 590 may have a shape that is substantially symmetrical with respect to the folding axis (A-axis). However, the first rear cover 580 and the second rear cover 590 need not have a shape that is symmetrical with each other. In another embodiment, the electronic device 10 may include a first rear cover 580 and a second rear cover 590 having various shapes. In another embodiment, the first rear cover 580 may be integrally formed with the first housing 510, and the second rear cover 590 may be integrally formed with the second housing 520.

[0039] In one embodiment, the first rear cover 580, the second rear cover 590, the first housing 510, and the second housing 520 may together form a space in which various components of the electronic device 10 (e.g., printed circuit boards or batteries) may be arranged. In another embodiment, one or more components may be arranged to be proximate to or visually exposed to the rear surface of the electronic device 10. For example, at least a portion of the sub-display 190 may be visually exposed through a first rear region 582 of the first rear cover 580. In another embodiment, one or more components or sensors may be visually exposed through a second rear region 592 of the second rear cover 590. In various embodiments, these sensors may include, for example, but not limited to, proximity sensors and / or a rear-facing camera.

[0040] Reference Figure 2 The hinge cover 530 may be disposed between the first housing 510 and the second housing 520 and may be configured to cover internal components (e.g., the hinge structure). In embodiments, depending on whether the electronic device 10 is in a flat or folded state, the hinge cover 530 may be covered by a portion of the first housing 510 and the second housing 520 or may be exposed to the outside.

[0041] For example, such as Figure 1 As shown, when the electronic device 10 is in a flat position, the hinge cover 530 is covered by the first housing 510 and the second housing 520, thus preventing it from being exposed. Furthermore, as... Figure 2 As shown, when the electronic device 10 is in a folded state (e.g., a fully folded state), the hinge cover 530 may be exposed to the outside between the first housing 510 and the second housing 520. When the first housing 510 and the second housing 520 are in an intermediate state where they are folded at an angle, the hinge cover 530 may be partially exposed to the outside between the first housing 510 and the second housing 520. The exposed area in the intermediate state may be smaller than the exposed area in the fully folded state. In an embodiment, the hinge cover 530 may include a curved surface.

[0042] The display 100 can be arranged in the space defined by the foldable housing 500. For example, the display 100 can be mounted on a recess formed by the foldable housing 500 and form most of the front surface of the electronic device 10.

[0043] Therefore, the front surface of the electronic device 10 may include a display 100, a portion of the first housing 510 adjacent to the display 100, and a portion of the second housing 520. Furthermore, the rear surface of the electronic device 10 may include a first rear cover 580, a portion of the first housing 510 adjacent to the first rear cover 580, a second rear cover 590, and a portion of the second housing 520 adjacent to the second rear cover 590.

[0044] Display 100 may refer to a display that allows at least a portion of it to be deformed into a curved surface. In embodiments, such as Figure 1 As shown, the display 100 may include a folding region 103, and a component disposed on one side relative to the folding region 103. Figure 1 The first region 101 on the left side of the folded region 103 shown, and the region arranged on the other side relative to the folded region 103 ( Figure 1 The second region 102 is located on the right side of the folded region 103 shown.

[0045] Figure 1 The division of the display 100 shown is merely exemplary, and the display 100 can be divided into multiple (e.g., two, four, or more) regions depending on its structure or function. For example, with Figure 1 In the illustrated embodiment, the regions are divided based on the respective folding regions 103 or folding axes (A) that are parallel to the y-axis. In another embodiment, the display 100 may be divided based on another folding region or another folding axis (e.g., the folding regions and folding axes are each parallel to the x-axis).

[0046] The first region 101 and the second region 102 may have a generally symmetrical shape with respect to the folded region 103. However, unlike the first region 101, the second region 102 may have a cutout portion for exposing the sensor region 524, resulting in an asymmetrical shape. Therefore, the first region 101 and the second region 102 may have symmetrical and asymmetrical portions.

[0047] In the following text, the operation of the first housing 510 and the second housing 520, as well as the various areas of the display 10, in each specific state of the electronic device 10 will be described.

[0048] In an embodiment, when the electronic device 10 is in a flat state (e.g., Figure 1When the first housing 510 and the second housing 520 are arranged to form a 180-degree angle and face the same direction, the surfaces of the first region 101 and the second region 102 of the display 100 can form a 180-degree angle between them and face the same direction (e.g., the front direction of the electronic device). Furthermore, the folding region 103 can form the same plane as the first region 101 and the second region 102.

[0049] In an embodiment, when the electronic device 10 is in a folded state (e.g., Figure 2 When the first housing 510 and the second housing 520 are arranged to face each other, the surfaces of the first region 101 and the second region 102 of the display 100 form a narrow angle between them (e.g., between 0 and 10 degrees) and can face each other. Furthermore, the folded region 103 can be formed as a partially curved surface with a specific curvature.

[0050] In this embodiment, when the electronic device 10 is in an intermediate state, the first housing 510 and the second housing 520 can be arranged to form a specific angle. Therefore, the surfaces of the first region 101 and the second region 102 of the display 100 form an angle greater than that in the folded state and less than that in the unfolded state. Furthermore, the folded region 103 can form a partially curved surface with a specific curvature. This curvature is less than that in the folded state.

[0051] Figure 3 This is an exploded perspective view showing an example foldable electronic device according to an embodiment.

[0052] Reference Figure 3 In an embodiment, the electronic device 10 may include a display unit (e.g., a display) 20, a support assembly (e.g., a support) 30, a substrate unit (e.g., a substrate) 600, a first housing 510, a second housing 520, a first rear cover 580, and a second rear cover 590. In this disclosure, the display unit 20 may be referred to as a display module or display component.

[0053] Display unit 20 may include display 100 and one or more plates or layers 140 on which display 100 is mounted. In an embodiment, plate 140 may be disposed between display 100 and support assembly 30. Display 100 may be arranged on one surface of plate 140 (e.g., based on...). Figure 3 On at least a portion of the upper surface of the display 100. The plate 140 may have a shape corresponding to the display 100. For example, a portion of the plate 140 may have a shape corresponding to the cutout 104 of the display 100.

[0054] The support assembly 30 may include a first support 410, a second support 420, a hinge structure disposed between the first support 410 and the second support 420, a hinge cover 530 covering the hinge structure, and a wiring member 430 (e.g., a flexible printed circuit board (FPCB)) spanning the first support 410 and the second support 420.

[0055] In this embodiment, the support assembly 30 may be disposed between the plate 140 and the substrate unit 600. For example, the first support 410 may be disposed between the first region 101 of the display 100 and the first substrate 610 of the substrate unit 600. The second support 420 may be disposed between the second region 102 of the display 100 and the second substrate 620 of the substrate unit 600.

[0056] In this embodiment, the wiring member 430 and the hinge structure may be arranged at least partially inside the bracket assembly 30. The wiring member 430 may be arranged along a direction spanning the first bracket 410 and the second bracket 420 (e.g., along the x-axis). The wiring member 430 may be arranged along a folding axis (e.g., along the folding region 103 of the electronic device 10) with respect to the folding axis of the folding region 103 of the electronic device 10. Figure 1 Arranged in a direction perpendicular to the y-axis or folding axis (A).

[0057] As described above, the substrate unit 600 may include a first substrate 610 arranged corresponding to the first support 410 and a second substrate 620 arranged corresponding to the second support 420. The first substrate 610 and the second substrate 620 may be arranged within a space formed by all or substantially all of the support assembly 30, the first housing 510, the second housing 520, the first rear cover 580, and the second rear cover 590. Components for implementing various functions of the electronic device 10 may be mounted on the first substrate 610 and the second substrate 620.

[0058] The first housing 510 and the second housing 520 can be assembled to be connected to both sides of the support assembly 30 when the display unit 20 is connected to the support assembly 30. As will be described later, the first housing 510 and the second housing 520 can be connected to the support assembly 30 by sliding on both sides of the support assembly 30.

[0059] In an embodiment, the first housing 510 may have a first rotary support surface 512, and the second housing 520 may have a second rotary support surface 522 corresponding to the first rotary support surface 512. Each of the first rotary support surface 512 and the second rotary support surface 522 may have a curved surface corresponding to the curved surface included in the hinge cover 530.

[0060] In an embodiment, when the electronic device 10 is in an unfolded state (e.g., Figure 1When the device is folded (e.g., when the device is in a folded state), the first rotary support surface 512 and the second rotary support surface 522 can cover the hinge cover 530, so that the hinge cover 530 is not exposed to the rear surface of the electronic device 10, or is exposed to a minimum extent. Meanwhile, when the electronic device 10 is in a folded state (e.g., when the device is folded), the hinge cover 530 is not exposed to the rear surface of the electronic device 10. Figure 2 When the first rotating support surface 512 and the second rotating support surface 522 are rotated along the curved surface included in the hinge cover 530, the hinge cover 530 can be exposed to the rear surface of the electronic device 10.

[0061] Figure 4 This is an exploded perspective view of an electronic device according to an embodiment of the present disclosure.

[0062] Reference Figure 4 The electronic device according to the embodiment may include a flexible display module 800 having a front panel 710, a display 810, middle panels 720 and 730, an adhesive layer 820 and / or a support layer 830.

[0063] According to an embodiment, the front panel 710 can be configured to face a first direction. The first direction may refer to the direction of the front surface of the electronic device. Figure 4 In the text, the first direction indicates the upward direction. The front panel 710 may refer to a window having a surface exposed to the outside of the electronic device and receiving user touches for manipulating the screen or inputting data. In the case of a foldable electronic device that can be folded or unfolded, the front panel 710 should fold or unfold together with the electronic device. Therefore, the front panel 710 may be formed of an elastically deformable material. For example, a plastic polymer material such as polyimide can be used.

[0064] Although not shown, the rear panel according to the embodiment may be configured to face a second direction opposite to the first direction. The rear panel may also be configured to be substantially parallel to the front panel 710. Additionally, although not shown, side members may be configured to surround the space formed by both the front panel 710 and the rear panel. The side members may be integrally formed with the rear panel or formed separately from the rear panel. The front panel 710, the rear panel, and the side members may constitute a housing that forms the overall appearance of the electronic device.

[0065] According to the embodiment, intermediate plates 720 and 730 may be disposed in the space between the front plate 710 and the rear plate, and each may include a third surface facing a first direction. The third surface of the intermediate plate 720 may include a recess 721 formed concave in a second direction. The recess 721 may refer to various electronic components 817 on which electronic devices are disposed (see...). Figure 5 The space provided in the recess 721. For example, the electronic component 817 disposed in the recess 721 may include a display driver integrated circuit (IC) for controlling the display 810, which will be described later.

[0066] The display 810 according to an embodiment may include a first surface 811 (e.g., a front surface) facing a first direction and a second surface 813 (e.g., a rear surface) facing a second direction. The display 810 may be a flexible display. The first surface 811 of the display 810 may be combined with a front panel 710 such that the display 810 can be folded together with the front panel 710. The display 810 combined with the front panel 710 is visible through at least a portion of the front panel 710. Although not shown, the display 810 may include a polarizer plate, a panel, a pad, etc. When powered, the display 810 may emit light under the control of a display driver IC to display various information.

[0067] According to an embodiment, the support layer 830 can be combined with the second surface 813 of the display 810. The support layer 830 can be formed of a material (such as a metallic material) capable of forming a thin film and ensuring a certain level of strength. For example, stainless steel can be used for the support layer 830. The support layer 830 can serve as a base frame, allowing the front panel 710, which is formed to be easily deformable, and the display 810 to maintain a flat shape. The support layer 830 can be mounted on and combined with the intermediate panels 720 and 730 or the rear panel to secure the display 810 to the electronic device. In the example shown, the support layer 830 is combined with the intermediate panels 720 and 730. The support layer 830 can be divided into two parts along the central axis where the front panel 710 and the display 810 are folded.

[0068] In an embodiment, the support layer 830 and the display 810 can be combined with each other via an adhesive layer 820. The adhesive layer 820 can be, for example, a pressure-sensitive adhesive (PSA). The adhesive layer 820 can combine the support layer 830 and the display 810 in a surface-contact manner. The adhesive layer 820 may include a fourth surface attached to a second surface of the display and a fifth surface attached to the support layer 830. The adhesive layer 820 can be divided into two parts, similar to the support layer 830. Certain portions of the adhesive layer 820 may not combine the support layer 830 and the display 810. For example, an opening 821 may be formed in a first portion of the adhesive layer 820 without combining the support layer 830 and the display 810. When the support layer 830 is combined with the intermediate plates 720 and 730, the first portion of the adhesive layer 820 may correspond to the position of a recess 721 formed in the intermediate plate 720.

[0069] When an external force is applied to the electronic device according to the embodiment, the applied force can be transmitted to a specific portion of the support layer 830 and cause plastic deformation of the support layer 830. That is, the deformed portion of the support layer 830 may not return to its original state. For example, when a certain pressure is applied to the surface of the front plate 710 at the location corresponding to the recess 721 of the middle plate 720, the support layer 830 can be plastically deformed into a concave shape. At this time, the stress can be concentrated on the portion of the support layer 830 that contacts the edge of the recess 721, and the support layer 830 may bend along the edge of the recess 721 and sink into the recess 721. As a result, plastic deformation may occur.

[0070] Additionally, when an external force is applied to the electronic device according to another embodiment, the applied force can be transmitted to a specific portion of the support layer 830 and cause temporary deformation of the support layer 830. Then, when the applied external force is removed, the deformed portion of the support layer 830 can return to its original state. For example, when a certain pressure is applied to the surface of the front panel 710 at the location corresponding to the recess 721 of the middle panel 720, the support layer 830 can be temporarily deformed into a concave shape. At this time, stress can be concentrated on the portion of the support layer 830 that contacts the edge of the recess 721, and the support layer 830 can bend along the edge of the recess 721 and sink into the recess 721. Subsequently, when the applied pressure is removed, the deformed support layer 830 can elastically return to its original state. In addition, forming an opening 821 in the adhesive layer 820 to partially separate the support layer 830 and the display 810 can prevent the deformation of the support layer 830 from being transferred to the display 810 and the front panel 710.

[0071] Figure 5 This is a diagram illustrating a flexible display module as seen from the second surface of the display according to an embodiment of the present disclosure.

[0072] Reference Figure 5 A display 810 (see embodiment 810) is provided, illustrating an embodiment according to the present disclosure. Figure 4 The second surface 813 (see) Figure 4 The diagram shows the flexible display module 800 as seen from the direction shown. That is to say, Figure 5 The rear surface of the flexible display module 800 is shown.

[0073] According to an embodiment, a flexible printed circuit board (FPCB) 815 and electronic components 817, such as a display driver IC for controlling the display 810, may be disposed on the rear surface of the flexible display module 800. The FPCB 815 may extend from the side surface of the display 810 and bend toward the second surface 813. The electronic components 817 are housed in an intermediate plate 720 (see [link to example]). Figure 4 and Figure 6 The recess 721 in ) (see Figure 4 and Figure 6 )middle.

[0074] Figure 6 This is a perspective view showing a recess in an electronic device according to an embodiment of the present disclosure.

[0075] Reference Figure 6 The intermediate plate 720 may include a third surface facing a first direction, and a recess 721 formed on the third surface to be recessed in a second direction. The recess 721 may refer to a space for receiving various electronic components 817 disposed in an electronic device (see [link to relevant documentation]). Figure 5 A specific space. Depending on the number and location of these electronic components 817 embedded in the electronic device, multiple recesses can be formed at different locations. For example, such as... Figure 5 As shown, the recess 721 may be formed to correspond to the location where an electronic component 817, such as a display driver IC, is disposed. The recess 721 may have a depth corresponding to the thickness of the electronic component 817 to prevent an increase in the overall thickness of the electronic device with edge 723.

[0076] Figure 7A and Figure 7B This is a cross-sectional view illustrating an electronic device according to various embodiments of the present disclosure.

[0077] Figure 7A and Figure 7B Along Figure 5 The corresponding cross-sectional view is obtained by cutting line AA. Specifically, Figure 7A This shows the state before an external force is applied to the electronic device. Figure 7B This shows the state of the electronic device after an external force is applied. Although Figure 7A and Figure 7B The corresponding layers are depicted as separate from each other, but this is merely for the convenience of distinguishing adjacent layers. In reality, neighboring layers are attached to each other or very close together.

[0078] Reference Figure 7A and Figure 7BWhen an external force is applied to the electronic device, particularly when the force is applied to a specific portion of the support layer 830, the support layer 830 can be plastically deformed and may not return to its original state. For example, when an external force is applied to the surface of the front panel 710 corresponding to the recess 721 of the intermediate panel 720 or the first portion of the adhesive layer 820, the support layer 830 can be plastically deformed into a concave shape. At this time, stress can be concentrated on the portion of the support layer 830 that contacts the edge 723 of the recess 721, and the support layer 830 can bend along the edge 723 of the recess 721 and sink into the recess 721. As a result, plastic deformation can occur. If the support layer 830 and the display 810 are attached as a whole by the adhesive layer 820, the shape of the plastically deformed support layer 830 can be transferred to the front panel 710. As a result, the user can recognize this.

[0079] However, according to such Figure 7A and Figure 7B In the electronic device of the illustrated embodiment, an opening 821 is formed in a first portion of the adhesive layer 820 to partially remove the adhesive layer 820, thereby partially separating the support layer 830 and the display 810. The opening 821 is formed at a location corresponding to the recess 721. By forming the opening 821, even when the support layer 830 is plastically deformed by external force, the deformed shape of the support layer 830 does not transfer to the display 810 and the front panel 710.

[0080] In an embodiment, the area of ​​the opening 821 formed in the adhesive layer 820 may be larger than the area of ​​the recess 721. (Refer to...) Figure 7A In the cross-sectional view, when the recess 721 has a width indicated by "X", the opening 821 can be formed to have a width greater than "α" on each side. In other words, the width of the opening 821 can be "X+2α". Forming the opening 821 to be larger than the recess 721 is to effectively prevent deformation of the support layer 830 from being transmitted to the display 810 and the front panel 710.

[0081] Figure 8A and Figure 8B This is a cross-sectional view illustrating an electronic device according to various embodiments of the present disclosure.

[0082] Figure 8A and 8B Along Figure 5 The corresponding cross-sectional view is obtained by cutting line AA. Specifically, Figure 8A This shows the state before an external force is applied to the electronic device. Figure 8B This shows the state of the electronic device after an external force is applied. Although Figure 8A and 8B The corresponding layers are depicted as separate from each other, but this is merely for the convenience of distinguishing adjacent layers. In reality, neighboring layers are attached to each other or very close together.

[0083] Reference Figure 8A and 8B Similar to Figure 7A and 7B An opening 821 is formed in the first portion of the adhesive layer 820 to partially remove the adhesive layer 820, thereby partially separating the support layer 830 and the display 810. The location of the opening 821 corresponds to the recess 721. By forming the opening 821, even when the support layer 830 is plastically deformed by external force, the deformed shape of the support layer 830 does not transfer to the display 810 and the front panel 710.

[0084] Even if the adhesive layer 820 has a very small thickness, the empty space between the display 810 and the support layer 830 created by the opening 821 of the adhesive layer 820 can be disadvantageous. Therefore, the electronic device according to another embodiment may also include a support plate 840 disposed in the opening 821. The support plate 840 is used to virtually eliminate the empty space between the display 810 and the support layer 830. The support plate 840 may have the same thickness as the adhesive layer 820 or a smaller thickness than the adhesive layer 820.

[0085] The support plate 840 may include a sixth surface facing a first direction and a seventh surface facing a second direction. The sixth surface of the support plate 840 may be the surface that contacts the display 810, and the seventh surface may be the surface that contacts the support layer 830. The support plate 840 may fill the empty space between the display 810 and the support layer 830 and prevent the display 810 and the support layer 830 from coming together. In order to stably position the support plate 840 in the opening 821 of the adhesive layer 820, adhesive material may be applied to the sixth or seventh surface to be attached to the display 810 or the support layer 830.

[0086] In this embodiment, the area of ​​the opening 821 formed in the adhesive layer 820 may be larger than the area of ​​the recess 721. (Refer to...) Figure 8A In the cross-sectional view, when the recess 721 has a width indicated by "X", the opening 821 can be formed to have a width greater than "α" on each side. In other words, the width of the opening 821 can be "X+2α". Forming the opening 821 larger than the recess 721 is to effectively prevent deformation of the support layer 830 from being transmitted to the display 810 and the front panel 710. Additionally, the support plate 840 can be larger than the recess 721 but smaller than the opening 821. The support plate 840 can be formed to be smaller than the opening 821 by "A" on each side. In other words, the width of the support plate 840 can be "X+2(α-A)".

[0087] Figure 9 This is a cross-sectional view showing a recessed portion with modified edges in an electronic device according to an embodiment of the present disclosure.

[0088] Reference Figure 9 A cross-sectional view is provided showing a recess 721 with a modified edge 725 in an electronic device according to an embodiment of the present disclosure. Although Figure 9 The layers are depicted as separate from each other, but this is merely for the convenience of distinguishing adjacent layers. In reality, neighboring layers are attached to each other or very close together.

[0089] As described above, when an external force is applied to the electronic device, particularly when the force is applied to the portion of the surface of the front panel 710 corresponding to the recess 721 of the intermediate panel 720 or the first portion of the adhesive layer 820, the support layer 830 can plastically deform into a concave shape. At this time, stress can be concentrated on the portion of the support layer 830 that contacts the edge of the recess 721, and the support layer 830 can bend along the edge of the recess 721 and sink into the recess 721. As a result, plastic deformation can occur. Therefore, in this embodiment, the edge of the recess 721 can be modified by a rounding or chamfering process. The modified edge 725 can reduce stress concentration, thereby minimizing the plastic deformation of the support layer 830.

[0090] Figure 10 This is an exploded perspective view of an electronic device according to embodiments of the present disclosure, and Figure 11 According to embodiments of this disclosure Figure 10 A cross-sectional view of the electronic device shown.

[0091] Reference Figure 10 and Figure 11 The electronic device according to the embodiment may include a flexible display module 1000 having a front panel 710, a display 810 having a first surface 811 and a second surface 813, an intermediate panel 720 and an intermediate panel 730 having recesses 721, and a coating 1031 interposed between a support layer 1030 and an adhesive layer 1020. Although Figure 11 The layers are depicted as separate from each other, but this is merely for the convenience of distinguishing adjacent layers. In reality, neighboring layers are attached to each other or very close together.

[0092] In the following description, Figure 10 and Figure 11 The electronic device shown is Figure 4 The differences between the electronic devices shown will be discussed in more detail.

[0093] In this embodiment, the support layer 1030 and the display 810 can be combined with each other via an adhesive layer 1020. The adhesive layer 1020 can be, for example, a pressure-sensitive adhesive (PSA), and the support layer 1030 and the display 810 can be combined in a surface contact manner.

[0094] However, the support layer 1030 and the display 810 can be partially separated. For example, a coating 1031 may be formed in a first portion of the support layer 1030 to separate the support layer 1030 and the adhesive layer 1020. The first portion of the support layer 1030 may correspond to the position of the recess 721 formed in the intermediate plate 720.

[0095] Coating 1031 may be disposed between support layer 1030 and adhesive layer 1020. Coating 1031 may be manufactured and disposed separately, or it may be formed by surface treatment of support layer 1030 or adhesive layer 1020. For example, coating 1031 may be a silver (Ag) coating, aluminum (Al) coating, or fingerprint-resistant (AF) coating. The thickness of coating 1031 may be approximately 5 μm. The area of ​​coating 1031 may be larger than the area of ​​recess 721.

[0096] Figure 12 This is an exploded perspective view of an electronic device according to embodiments of the present disclosure. Figure 13 This is a cross-sectional view of an electronic device according to an embodiment of the present disclosure.

[0097] Reference Figure 12 and Figure 13 The electronic device according to various embodiments may include a flexible display module 1200 having a front panel 710, a display 1210, middle panels 720 and 730, an adhesive layer 1220, a support layer 1230, a support plate 1240, an edge adhesive layer 1250, and / or a buffer layer 1260.

[0098] The front panel 710 may refer to a window that receives user touches for manipulating the screen or inputting data. In the case of a foldable electronic device that can be folded or unfolded, the front panel 710 should fold or unfold together with the electronic device. Therefore, the front panel 710 may be formed of a resiliently deformable material. For example, a plastic polymer material such as polyimide can be used.

[0099] Display 1210 can be a flexible display. Display 1210 can be combined with front panel 710 via its first surface 1211, allowing display 1210 to be folded together with front panel 710. Display 1210 may be composed of panel 1210a, padding layer 1210c, panel adhesive 1210b, etc. When powered, display 1210 can emit light under the control of display driver IC to display various information.

[0100] Intermediate plates 720 and 730 provide locations for arranging various electronic components embedded in an electronic device. Intermediate plates 720 and 730 may include various structures for mounting various electronic components, such as recesses, holes, and protrusions. Therefore, the surfaces of intermediate plates 720 and 730 may be uneven, and irregularities or operations may be formed.

[0101] The support layer 1230 can be combined with the second surface 1213 of the display 1210. The support layer 1230 can be formed of a material (such as a metallic material) capable of forming a thin film and ensuring a certain level of strength. For example, the support layer 1230 can be formed of stainless steel or a combination of stainless steel and aluminum. The support layer 1230 can serve as a base frame, allowing the front panel 710 and the display 1210, which are formed to be easily deformable, to maintain a flat shape. The support layer 1230 can be divided into two parts along the central axis where the front panel 710 and the display 1210 are folded.

[0102] The support layer 1230 and the display 1210 can be combined with each other via the adhesive layer 1220. The adhesive layer 1220 can be, for example, a pressure-sensitive adhesive (PSA).

[0103] The support plate 1240 can fill the empty space (i.e., the space without adhesive) formed between the display 1210 and the support layer 1230. The support plate 1240 can have the same thickness as the adhesive layer 1220 or a smaller thickness than the adhesive layer 1220.

[0104] Edge adhesive layer 1250 can combine the edges of support layer 1230 and intermediate plates 720 and 730. Edge adhesive layer 1250 can be formed with an area sufficient to overcome the elasticity of buffer layer 1260 and adequately ensure the bonding force between support layer 1230 and intermediate plates 720 and 730. Edge adhesive layer 1250 can be divided into two parts along the axis of its fold in support layer 1230.

[0105] A buffer layer 1260 may be placed between the support layer 1230 and the intermediate plates 720 and 730. Furthermore, the buffer layer 1260 may be disposed on the same layer as the edge adhesive layer 1250 without overlapping it. For example, the buffer layer 1260 may be disposed in portions of the intermediate plates 720 and 730 other than the portion where the edge adhesive layer 1250 is disposed. The buffer layer 1260 may be formed of sponge or any other elastic material. The buffer layer 1260 may be combined with the support layer 1230 through one surface and may be divided into two parts along the axis of the folded support layer 1230. The buffer layer 1260 may be formed to be thicker than the edge adhesive layer 1250. When the support layer 1230 and the intermediate plates 720 and 730 are attached via the edge adhesive layer 1250, the buffer layer 1260 may be partially compressed.

[0106] When the flexible display module 1200 according to various embodiments is mounted on the intermediate plates 720 and 730, surface irregularities or operations of the intermediate plates 720 and 730 can be visually identified by the user through the front plate 710. Specifically, when irregularities or operations are formed on the surfaces of the intermediate plates 720 and 730, the gap between the support layer 1230 of the flexible display module 1200 and the intermediate plates 720 and 730 may be narrow in some portions and relatively wide in others. This may cause the front plate 710 to deform significantly toward the intermediate plates 720 and 730 in portions with wide gaps and deform less in portions with narrow gaps. As a result, the front plate 710 may have an uneven surface, and bending or wavy phenomena may occur on the front plate 710. The buffer layer 1260 according to various embodiments can absorb surface irregularities or operations of the intermediate plates 720 and 730 and elastically support the support layer 1230 using the elastic force generated by compression. The buffer layer 1260 elastically supports the support layer 1230, preventing bending or wavy phenomena from occurring on the front panel 710 and giving the front panel 710 a flat surface.

[0107] According to embodiments of the present disclosure, an electronic device may include a housing, a display 810, intermediate plates 720 and 730, an adhesive layer 820, and a support layer 830. The housing includes a front plate 710 facing a first direction, a rear plate facing a second direction opposite to the first direction, and side members surrounding the space between the front plate 710 and the rear plate. The display 810 is visible through at least a portion of the front plate 710 and includes a first surface 811 facing the first direction and a second surface 813 facing the second direction. The intermediate plates 720 and 730 are disposed between the display 810 and the rear plate, including a third surface facing the second surface 813 of the display 810, and including a recess 721 formed on the third surface. The adhesive layer 820 is attached to the second surface 813 of the display 810 and includes an opening 821 formed in a first portion that overlaps with the recess 721 when viewed from the display 810. The support layer 830 is disposed between the adhesive layer 820 and the intermediate plates 720 and 730.

[0108] Display 810 may include a flexible display.

[0109] The display 810 may include a flexible printed circuit board 815 extending from a side surface of the display 810 and bent toward a second surface 813, and at least one electronic component 817 mounted on the flexible printed circuit board 815 and facing a second direction.

[0110] The recess 721 can accommodate at least one electronic component 817.

[0111] When viewed from the display 810, the area of ​​the opening 821 can be larger than the area of ​​the recess 721.

[0112] The electronic device may also include a support plate 840, wherein the support plate 840 is disposed in the opening 821 and attached to the second surface 813 of the display 810, and the support plate 840 may include a sixth surface facing a first direction and a seventh surface facing a second direction, an adhesive material is included between the sixth surface and the second surface 813, and no adhesive material is included between the seventh surface and the support layer 830.

[0113] The support plate 840 may have the same thickness as or less than the thickness of the adhesive layer 820.

[0114] The electronic device may also include a support plate 840, wherein the support plate 840 is disposed in an opening 821 between the display 810 and the support layer 830, and includes a sixth surface facing a first direction and a seventh surface facing a second direction.

[0115] The support plate 840 may include an adhesive material between the sixth surface and the second surface 813, but may not include an adhesive material between the seventh surface and the support layer 830.

[0116] The support plate 840 may not include adhesive material between the sixth surface and the second surface 813, and may include adhesive material between the seventh surface and the support layer 830.

[0117] The edges of the recess 721 can be modified by rounding or chamfering.

[0118] According to embodiments of this disclosure, an electronic device may include a housing, a display 810, intermediate plates 720 and 730, an adhesive layer 1020, a support layer 1030, and a coating 1031. The housing includes a front plate 710 facing a first direction, a rear plate facing a second direction opposite to the first direction, and side members surrounding the space between the front plate 710 and the rear plate. The display 810 is visible through at least a portion of the front plate 710 and includes a first surface 811 facing the first direction and a second surface 813 facing the second direction. The intermediate plate... 720 and 730 are disposed between the display 810 and the rear panel, including a third surface facing the second surface 813 of the display 810, and including a recess 721 formed on the third surface. An adhesive layer 1020 is attached to the second surface 813 of the display 810. A support layer 1030 is disposed between the adhesive layer 1020 and the intermediate panels 720 and 730. A coating 1031 is disposed between the support layer 1030 and the adhesive layer 1020 and is disposed in a first portion overlapping the recess 721 when viewed from the display 810.

[0119] When viewed from the display 810, the area of ​​the coating 1031 can be larger than the area of ​​the recess 721.

[0120] Coating 1031 may include at least one of a silver (Ag) coating, an aluminum (Al) coating, or an anti-fingerprint (AF) coating.

[0121] According to embodiments of this disclosure, a flexible display module 800, 1000, or 1200 may include a front panel 710, a display 810, an adhesive layer 820 or 1020, a support layer 830 or 1030, and a coating 1031. The front panel 710 faces a first direction and is foldable. The display 810 is visible through at least a portion of the front panel 710 and includes a first surface facing the first direction and a second surface facing a second direction opposite to the first direction. The adhesive layer 820 or 1020 is attached to the second surface of the display 810. The support layer 830 or 1030 is combined with the adhesive layer 820. The coating 1031 is at least partially disposed between the support layer 830 or 1030 and the adhesive layer 820 or 1020.

[0122] Although this disclosure has been shown and described with reference to various embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope of this disclosure as defined by the appended claims and their equivalents.

Claims

1.An electronic device comprising: a front plate configured to be foldable; a display configured to be visible through at least a portion of the front plate and combined with the front plate such that the display can be folded together with the front plate; a plurality of middle plates disposed under the display, each of the plurality of middle plates disposed to be separated from each other with respect to a folding area of the electronic device; a support layer supporting the display and including a first portion and a second portion separated from each other with respect to the folding area of the electronic device, wherein the first portion of the support layer is disposed between a first middle plate of the plurality of middle plates and the display, and the second portion of the support layer is disposed between a second middle plate of the plurality of middle plates and the display; and a buffer layer including a first portion and a second portion separated from each other with respect to the folding area of the electronic device, wherein the first portion of the buffer layer is disposed between the first portion of the support layer and the first middle plate of the plurality of middle plates, and the second portion of the buffer layer is disposed between the second portion of the support layer and the second middle plate of the plurality of middle plates, wherein the buffer layer is formed of an elastic material. 2.The electronic device of claim 1, further comprising: a plurality of support plates disposed to be separated from each other with respect to the folding area of the electronic device, wherein a first support plate of the plurality of support plates is disposed between the first portion of the support layer and the display, and a second support plate of the plurality of support plates is disposed between the second portion of the support layer and the display. 3.The electronic device of claim 2, further comprising: a plurality of adhesive layers disposed to be separated from each other with respect to the folding area of the electronic device, wherein a first adhesive layer of the plurality of adhesive layers is disposed between the first portion of the support layer and the display, and a second adhesive layer of the plurality of adhesive layers is disposed between the second portion of the support layer and the display; and the plurality of support plates are located in empty spaces between the plurality of adhesive layers. 4.The electronic device of claim 1, wherein the first portion of the support layer is disposed adjacent to the folding area, and the second portion of the support layer is disposed adjacent to the folding area. 5.The electronic device of claim 1, wherein the first portion of the buffer layer is disposed adjacent to the folding area, and the second portion of the buffer layer is disposed adjacent to the folding area. 6.The electronic device of claim 1, wherein, the first portion of the buffer layer is combined to the first portion of the support layer, and wherein the second portion of the buffer layer is combined to the second portion of the support layer. 7.The electronic device of claim 1, further comprising: a first edge adhesive layer combined to an edge of the first portion of the support layer and an edge of the first middle plate; and a second edge adhesive layer combined to an edge of the second portion of the support layer and an edge of the second middle plate; wherein the first portion of the buffer layer and the second portion of the buffer layer are located in empty spaces between the first edge adhesive layer and the second edge adhesive layer, ​ wherein a thickness of the first portion of the buffer layer is formed to be thicker than a thickness of the first edge adhesive layer, wherein a thickness of the second portion of the buffer layer is formed to be thicker than a thickness of the second edge adhesive layer. 8.The electronic device of claim 1, wherein a size of the first portion of the buffer layer is smaller than a size of the first portion of the support layer, and wherein a size of the second portion of the buffer layer is smaller than a size of the second portion of the support layer. 9.An electronic device comprising: a front plate configured to be foldable; a flexible display combined with the front plate, the flexible display being configured to be visible through at least a portion of the front plate and foldable with the front plate; a plurality of intermediate plates disposed under the flexible display, each of the plurality of intermediate plates being disposed to be separated from each other with respect to a folding area of the electronic device; a plurality of support layers supporting the flexible display and disposed to be separated from each other with respect to the folding area of the electronic device, wherein a first support layer of the plurality of support layers is disposed between a first intermediate plate of the plurality of intermediate plates and the flexible display, and a second support layer of the plurality of support layers is disposed between a second intermediate plate of the plurality of intermediate plates and the flexible display; and a plurality of buffer layers disposed to be separated from each other with respect to the folding area of the electronic device, wherein a first buffer layer of the plurality of buffer layers is combined to the first support layer of the plurality of support layers between the first support layer of the plurality of support layers and the first intermediate plate of the plurality of intermediate plates, and a second buffer layer of the plurality of buffer layers is combined to the second support layer of the plurality of support layers between the second support layer of the plurality of support layers and the second intermediate plate of the plurality of intermediate plates, wherein at least one buffer layer of the plurality of buffer layers is formed of an elastic material. 10.The electronic device of claim 9, further comprising: a plurality of support plates disposed to be separated from each other with respect to the folding area of the electronic device, wherein a first support plate of the plurality of support plates is disposed between the first support layer and the flexible display, and a second support plate of the plurality of support plates is disposed between the second support layer and the flexible display. 11.The electronic device of claim 10, further comprising: a plurality of adhesive layers disposed to be separated from each other with respect to the folding area of the electronic device, wherein a first adhesive layer of the plurality of adhesive layers is disposed between the first support layer and the flexible display, and a second adhesive layer of the plurality of adhesive layers is disposed between the second support layer and the flexible display; and the plurality of support plates are located in empty spaces between the plurality of adhesive layers. 12.The electronic device of claim 9, wherein the first support layer is disposed adjacent to the folding area, and the second support layer is disposed adjacent to the folding area. 13.The electronic device of claim 9, wherein the first buffer layer is disposed adjacent to the folding area, and the second buffer layer is disposed adjacent to the folding area. 14.The electronic device of claim 9, further comprising: a first edge adhesive layer combined to an edge of the first support layer and an edge of the first interlayer; and a second edge adhesive layer combined to an edge of the second support layer and an edge of the second interlayer; wherein the first and second cushion layers are located in a hollow space between the first edge adhesive layer and the second edge adhesive layer, wherein a thickness of the first cushion layer is formed to be thicker than a thickness of the first edge adhesive layer, wherein a thickness of the second cushion layer is formed to be thicker than a thickness of the second edge adhesive layer. 15.The electronic device of claim 9, wherein a size of a first cushion layer of the plurality of cushion layers is smaller than a size of a first support layer of the plurality of support layers, and wherein a size of a second cushion layer of the plurality of cushion layers is smaller than a size of a second support layer of the plurality of support layers.

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