Electronic device including a transparent cover comprising glass and a foldable display coupled thereto

Abstract

An example electronic device includes a transparent cover and a flexible display coupled to the cover. The cover can include a first layer including glass, a second layer between the first layer and the flexible display, and a third layer between the first layer and the second layer. The third layer includes a pattern and has a hardness greater than a hardness of the second layer, the pattern overlapping a folded portion of the flexible display and including a plurality of grooves formed in a joint surface with the second layer.

Description

TECHNICAL FIELD

[0001] The disclosure relates to an electronic device including a transparent cover including glass and a foldable display coupled thereto. BACKGROUND

[0002] With the development of digital technology, various types of electronic devices, such as smart phones, tablet personal computers (PCs), and personal digital assistants (PDAs), are being provided. Electronic devices are designed to provide a larger screen while having a portable size that is comfortable in a user's hand. Electronic devices can be configured, for example, in a foldable type in which a screen is foldable or expandable. SUMMARY

[0003] TECHNICAL PROBLEM

[0004] A foldable-type electronic device can include a foldable display and a transparent glass cover coupled to the foldable display and forming an appearance of the electronic device. The glass cover can have natural smoothness or surface flatness of glass. In order for the glass cover to have flexibility, the glass cover can be configured in the form of a thin film due to the brittleness of glass. Accordingly, the glass cover has a risk of being damaged by external impact or external pressure.

[0005] Various embodiments of the disclosure can provide an electronic device including a transparent cover including glass and a foldable display coupled thereto, the transparent cover being capable of preventing or reducing damage caused by external impact or external pressure.

[0006] SOLUTION TO PROBLEM

[0007] According to an embodiment of the disclosure, an electronic device can include a transparent cover and a flexible display coupled to the cover, wherein the cover can include a first layer including glass, a second layer positioned between the first layer and the flexible display, and a third layer positioned between the first layer and the second layer, the third layer can include a pattern and can have a hardness greater than a hardness of the second layer, the pattern overlapping a folded portion of the flexible display and including a plurality of grooves formed on an engaging surface with the second layer.

[0008] ADVANTAGEOUS EFFECT OF THE INVENTION

[0009] An electronic device according to various embodiments of the disclosure can provide a beautiful appearance by using a transparent cover including glass, and can prevent or reduce damage to the transparent cover by external impact or external pressure.

[0010] Furthermore, effects obtainable or predictable by various embodiments of the disclosure will be explicitly or implicitly disclosed in the detailed description of embodiments of the disclosure. For example, various effects predicted according to various embodiments of the disclosure will be described in the detailed description below. BRIEF DESCRIPTION OF DRAWINGS

[0011] The above and other aspects, features and advantages of certain embodiments of the present disclosure will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0012] Figure 1 is a perspective view of a front surface of an example electronic device according to various embodiments when the example electronic device is in an unfolded state;

[0013] Figure 2 is a perspective view of a back surface of an example electronic device according to various embodiments when the example electronic device is in an unfolded state; Figure 1

[0014] Figure 3 is a perspective view of an example electronic device according to various embodiments when the example electronic device is in a folded state; Figure 1

[0015] Figure 4 is an exploded perspective view of an example electronic device according to various embodiments; Figure 1

[0016] Figure 5 is a cross-sectional view of a display assembly in an unfolded state included in an example electronic device according to various embodiments; Figure 1

[0017] Figure 6 is a cross-sectional view of a display assembly in a folded state of an example electronic device according to various embodiments; Figure 5

[0018] Figure 7a is a cross-sectional view of an example front cover according to various embodiments;

[0019] Figure 7b is a cross-sectional view of an example front cover according to various embodiments;

[0020] Figure 8 is a cross-sectional view of a display assembly in an unfolded state included in an example electronic device according to various embodiments; Figure 1

[0021] Figure 9 is a cross-sectional view of an example display assembly in a folded state according to various embodiments;

[0022] Figure 10 is a cross-sectional view of an example display assembly in a folded state according to various embodiments. DETAILED DESCRIPTION

[0023] Hereinafter, various embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0024] ​​​​​​It should be understood that various embodiments of the present disclosure and terms used therein are not intended to limit the technical features set forth herein to particular embodiments, and include various changes, equivalents or alternatives for the corresponding embodiments. In describing the drawings, like reference numerals can be used to refer to like or related elements. A singular form of a noun can include one or more of the things, unless the relevant context clearly dictates otherwise. As used herein, each of the phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B, or C," "at least one of A, B, and C," and "at least one of A, B, or C" can include all possible combinations of the items enumerated in the corresponding phrase. As used herein, terms such as "first," "second," "the first," and "the second" can be used to simply distinguish one element from another element, and do not in other ways limit (for example, in importance or sequence) the elements. It will be understood that if an element (for example, a first element) is referred to as being "coupled with / to" or "connected with / to" another element (for example, a second element) without using the term "operatively" or "communicatively," the element can be coupled with / to or connected with / to the other element directly (for example, wiredly), wirelessly, or via a third element.

[0025] An electronic device according to various embodiments disclosed herein can be one of various types of electronic devices. The electronic devices can include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, a home appliance, and the like. The electronic devices according to various embodiments of the present disclosure are not limited to the above-listed electronic devices.

[0026] Figure 1 is a perspective view of a front face of an example electronic device 10 when the example electronic device 10 is in a flat state or an unfolded state according to various embodiments. Figure 2 is a perspective view of a front face of an example electronic device 10 when the example electronic device 10 is in a flat state or an unfolded state according to various embodiments. Figure 1 is a perspective view of a back face of an example electronic device 10 when the example electronic device 10 is in a flat state or an unfolded state according to various embodiments. Figure 3 is a perspective view of a back face of an example electronic device 10 when the example electronic device 10 is in a flat state or an unfolded state according to various embodiments. Figure 1 is a perspective view of an example electronic device 10 when the example electronic device 10 is in a folded state according to various embodiments.

[0027] Referring to Figure 1 and Figure 2The electronic device 10 can include a foldable housing 100 and a flexible display (or a foldable display) 140 located in an internal space of the foldable housing 100. The foldable housing 100 can include a front surface 100A of the electronic device 10 facing the flexible display 140 and a rear surface 100B of the electronic device 10 located opposite the front surface 100A. The foldable housing 100 can include a first side surface 100C and a second side surface 100D of the electronic device 10 at least partially surrounding a space between the front surface 100A and the rear surface 100B. An image output from the flexible display 140 can be seen through the front surface 100A.

[0028] According to an embodiment, the foldable housing 100 can include a first housing unit (or a first housing or a first housing structure) 110 connected to a second housing unit (or a second housing or a second housing structure) 120 by a hinge (or a hinge assembly) (not shown). The first housing unit 110 and the second housing unit 120 can be rotatable with respect to a folding axis (e.g., a rotation axis of the hinge) C. The first housing unit 110 can include a first surface 101 of the electronic device 10 and a second surface 102 of the electronic device 10 facing in opposite directions. The second housing unit 110 can include a third surface 103 of the electronic device 10 and a fourth surface 104 of the electronic device 10 facing in opposite directions. The foldable housing 100 can be configured in an inward folding structure in which the front surface 100A is folded inward. For example, in the folded state of the electronic device 10, the first surface 101 and the third surface 103 can face each other, and the front surface 100A can be substantially not visually exposed. Figure 3

[0029] According to an embodiment, the foldable housing 100 can include a front cover (e.g., a window) 200 forming at least a portion of the front surface 100A, and the flexible display 140 can be protected from the outside by the front cover 200. Referring to Figure 1 The front cover 200 can have a rectangular shape including two long edges and two short edges. The front cover 200 can include a first section ①, a second section ②, and a folding section (or a bendable section) ③ between the first section ① and the second section ②. When the electronic device 10 changes from the unfolded state of the electronic device 10 to the folded state of the electronic device 10, the folding section ③ can be bent. Figure 1 Figure 3 Figure 3 Figure 1 ​​​​The folding section ③ can be unfolded when the foldable housing 100 is in the unfolded state. The first housing unit 110 can include the first section ①, and the first section ① can form the first surface 101. The second housing unit 120 can include the second section ②, and the second section ② can form the third surface 103. The first housing unit 110 can include a portion (not shown) of the folding section ③ located on one side with respect to the folding axis C. The second housing unit 120 can include a portion (not shown) of the folding section ③ located on the other side with respect to the folding axis C. The folding section ③ can form a fifth surface 105 between the first surface 101 and the third surface 103. The first surface 101, the third surface 103, and the fifth surface 105 can form a front surface 100A of the foldable housing 100.

[0030] According to an embodiment, the front cover 200 can include glass. The front cover 200 can have natural smoothness or surface flatness of glass. Unlike a plastic film (e.g., a polyimide film), the front cover 200 including glass can provide a shiny aesthetic, for example, when the screen is off. The front cover 200 including glass can have higher hardness than a plastic film or increased hardness and / or excellent scratch resistance compared to a plastic film.

[0031] The flexible display 140 can extend, for example, from the first section ① across the folding section ③ to the second section ②, and can be combined with the front cover 200. The flexible display 140 can include a first portion (not shown) overlapping the first section ①, a second portion (not shown) overlapping the second section ②, and / or a folding portion (not shown) overlapping the folding section ③. Referring to FIG. 1B, an active area of the flexible display 140, in which a plurality of pixels are disposed to express an image, can be visually exposed through a considerable portion of the front cover 200. The screen is an area for displaying an image in a device including the flexible display 140 and the front cover 200, and can include the active area of the flexible display 140 and an area of the front cover 200 overlapping the active area. The screen can have a rectangular shape, and edges of the screen can extend along edges of the front cover 200. Figure 1

[0032] ​According to an embodiment, the first housing unit 110 can include a first back cover 111 forming at least part of the second surface 102 and a first side member (or a first side bezel structure) 112 forming at least part of the first side surface 100C. The first side member 112 can have a form at least partially surrounding a space between the first back cover 111 and the front cover 200. The second housing unit 110 can include a second back cover 121 forming the fourth surface 104 and a second side member (or a second side bezel structure) 122 forming the second side surface 100D. The second side member 122 can have a form at least partially surrounding a space between the second back cover 121 and the front cover 200. The second surface 102 and the fourth surface 104 can form a rear surface 100B of the foldable housing 100. Referring to Figure 3 In the folded state of the electronic device 10, the first side member 112 and the second side member 122 can be disposed to overlap each other. The first side member 112 and / or the second side member 122 can be formed, for example, using ceramic, polymer, metal (e.g., aluminum, stainless steel, or magnesium), or a combination of at least two of the foregoing materials. The first side member 112 and / or the second side member 122 can include, for example, various metallic materials such as titanium, amorphous alloy, metal-ceramic composite (e.g., cermet), stainless steel, magnesium, magnesium alloy, aluminum, aluminum alloy, zinc alloy, and / or copper alloy.

[0033] According to an embodiment, the first back cover 111 and / or the second back cover 121 can be, for example, substantially opaque. The first back cover 111 and / or the second back cover 121 can be formed, for example, using coated or colored glass, ceramic, polymer, metal (e.g., aluminum, stainless steel, or magnesium), or a combination of at least two of the foregoing materials. In an embodiment, the first back cover 111 or the second back cover 121 can include a plate of various types of materials such as transparent glass, ceramic, and / or polymer, and at least one coating layer disposed on the plate using coating. In another example, the first back cover 111 or the second back cover 121 can include a plate of various types of materials such as transparent glass, ceramic, and / or polymer, and a film (e.g., a decorative film) having various visual effects attached to the plate. In an embodiment, the first back cover 111 and the first side member 112 can be formed as a single body and can include the same material. In an embodiment, the second back cover 121 and the second side member 122 can be formed as a single body and can include the same material.

[0034] Referring to Figure 1In an embodiment, when the electronic device 10 is in its unfolded state, the first surface 101 and the third surface 103 may face substantially the same direction, and the fifth surface 105 may form the same plane as the first surface 101 and the third surface 103. For example, when the electronic device 10 is in its unfolded state, the first surface 101 and the third surface 103 may form an angle of approximately 180 degrees. (Refer to...) Figure 2 When the electronic device 10 is in the unfolded state, the second surface 102 and the fourth surface 104 can face substantially the same direction.

[0035] Reference Figure 3 In this embodiment, the folded state can include a fully folded state. A fully folded state is when the first surface 101 and the third surface 103 are folded to their maximum extent so that they are close to each other; for example, the first surface 101 and the third surface 103 may face each other while forming a narrow angle (e.g., an angle of about 0 degrees to about 10 degrees). In the fully folded state, the front surface 100A may be substantially not exposed to the outside.

[0036] According to an embodiment, the unfolded state of the electronic device 10 can refer to, for example, except for... Figure 3 States other than the folded state, and may include a fully unfolded state or intermediate states. In the fully unfolded state, for example, as... Figure 1 As shown, the first surface 101 and the third surface 103 can form an angle of approximately 180 degrees. The intermediate state (not shown) can refer to the state between the folded state and the fully unfolded state.

[0037] Reference Figure 3 In one embodiment, the foldable housing 100 may include a hinged cover (or hinged housing) 130. When from... Figure 2 The unfolded state has changed to Figure 3 When folded, as the gap G between the first housing unit 110 and the second housing unit 120 opens, the hinge cover 130 can cover the interior of the electronic device 10 along the folding axis C, thus preventing its exposure. Figure 2 As shown, in the fully extended state of the electronic device 10, there is essentially no gap G between the first housing unit 110 and the second housing unit 120, and the hinge cover 130 can be covered by the first housing unit 110 and the second housing unit 120, thus remaining unexposed. Although not shown, in an intermediate state, the hinge cover 130 can be partially exposed between the first housing unit 110 and the second housing unit 120. The hinge cover 130 can... Figure 3 It is exposed more in the folded state than in the intermediate state.

[0038] According to various embodiments (not shown), the foldable housing can refer to a structure forming at least some of the front surface 100A, the rear surface 100B, the first side surface 100C, and the second side surface 100D, and the structure can be configured in various forms. For example, the foldable housing can include a first housing unit, a second housing unit, and a folding unit connected to the first housing unit and the second housing unit. The folding unit can refer to a portion that is more flexible than the first housing unit and the second housing unit, and can be bent in the folded state of the electronic device. The folding unit can be configured as, for example, a structure (e.g., a multi-bar structure, a hinge rail, or a hinge rail structure) in which a plurality of bars (or rails) extending in the x-axis direction are arranged from the first housing unit to the second housing unit. The folding portion can be configured using various other structures that are bendable (or have bending characteristics) while connecting the first housing unit and the second housing unit.

[0039] According to an embodiment, the electronic device 10 can further include a cover member 160 disposed on the front cover 200. The cover member 160 can be disposed, for example, in a screen surrounding area of the front cover 200 along an edge of the front cover 200. The cover member 160 is, for example, a buffer member, and can mitigate an impact between the first section ① and the second section ② of the front cover 200 to prevent (or reduce) the front cover 200 from being damaged when the electronic device 10 changes from the flat state to the folded state of Figure 1 Figure 3 The portion of the cover member 160 located in the first housing unit 110 (not shown) and the portion of the cover member 160 located in the second housing unit 120 can contact each other in the folded state of Figure 3 The first section ① and the second section ② can be positioned substantially spaced apart without contact. The cover member 160 can also contribute to the aesthetic feature as a bezel surrounding the screen. According to various embodiments, the screen can be further extended without being limited to the embodiment of Figure 1 The shape of the cover member 160 can thus be variously changed. In an embodiment, the screen can extend to substantially the entire area of the front cover 200, in which case the cover member 160 can be omitted.

[0040] According to an embodiment, the electronic device 10 can include at least one of a microphone hole 171, speaker holes 172 and 183, a sensor module 182, a first camera device 181, second camera devices 191 and 192, a flash 193, a key input device 174, a connector hole 173, a pen input device 175, or a sub display 150. According to an embodiment, the electronic device 10 can omit at least one of these components (e.g., the key input device 174), or can additionally include another component (e.g., a light emitting device).

[0041] ​The microphone hole 171 can be formed on the second side surface 100D, for example, corresponding to a microphone (not shown) located inside the electronic device 10. The location or number of the microphone hole 171 can vary without being limited to the embodiment of Figure 1 According to various embodiments, the electronic device 10 can include a plurality of microphones capable of detecting a sound direction.

[0042] The first speaker hole 172 can be formed on the second side surface 100D, for example, corresponding to a speaker (not shown) located inside the electronic device 10. The location of the speaker hole 172 can vary without being limited to the embodiment of Figure 1 According to an embodiment, the microphone hole 171 and the speaker hole 172 can be configured as one hole or the speaker hole 172 (e.g., for a piezoelectric speaker). The second speaker hole 183 can be formed on the first surface 101, for example, corresponding to a call receiver (not shown) located inside the electronic device 10. The cover member 160 can include a hole (not shown) formed corresponding to the second speaker hole 183.

[0043] The connector hole 173 can be formed on the second side surface 100D, for example, corresponding to a connector (e.g., a USB connector) located inside the electronic device 10. The electronic device 10 can transmit and / or receive power and / or data to and / or from an external electronic device electrically connected to the connector through the connector hole 173. The location of the connector hole 173 can vary without being limited to the embodiment of Figure 1

[0044] The first camera device 181 can be located inside the electronic device 10, for example, near the first surface 101. According to an embodiment, the first camera device 181 can receive external light through a portion (not shown) of the front cover 200 and an opening (not shown) of the flexible display 140 aligned therewith. The opening of the flexible display 140 can include a through-hole, but can be configured in the form of a notch, without being limited thereto. According to various embodiments (not shown), a substantially transparent area formed by changing a pixel structure and / or a wiring structure, instead of the opening of the flexible display 140, can be configured. In this case, the first camera device 181 can be located on or positioned adjacent to a rear surface of the flexible display 140.

[0045] ​The second camera devices 191 and 192 may, for example, be disposed in openings (not shown) formed in the first rear cover 111. The flash 193 may, for example, be positioned inside the electronic device 10 near the second surface 102, and light output from the flash 193 can advance to the outside through a portion of the transparent region of the second surface 102. The first camera device 181 or the second camera devices 191 and 192 can include one or more lenses, image sensors, and / or image signal processors. The flash 193 can include, for example, a light emitting diode or a xenon lamp.

[0046] The key input device 174 may, for example, be disposed in an opening (not shown) formed on the first side surface 100C. In another embodiment, the electronic device 10 can not include some or all of the key input device 174, and the key input device not included can be configured in other forms, such as a soft key, on the flexible display 140. In an embodiment (not shown), the key input device can include at least one sensor module.

[0047] The sensor module 182 can generate, for example, an electrical signal or a data value corresponding to an internal operating state or an external environmental state of the electronic device 10. According to an embodiment, the sensor module 182 can include a proximity sensor that generates a signal related to proximity of an external object based on light received through the front surface 100A of the electronic device 10 facing in a direction in which a screen faces. The flexible display 140 can include an opening formed to correspond to the sensor module 182, or can be configured to include a substantially transparent region formed by changing a pixel structure and / or a wiring structure instead of the opening. In this case, the sensor module 182 can be positioned on or adjacent to a rear surface of the flexible display 140. In another example (not shown), the sensor module can include various biometric sensors, such as a fingerprint sensor and an HRM sensor, for detecting biometric information based on light received through the front surface 100A or the rear surface 100B of the electronic device 10. The electronic device 10 can include at least one of various other sensor modules (e.g., a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, and a humidity sensor, or an illuminance sensor).

[0048] The pen input device 175 (e.g., a stylus) can be guided into the second housing 120 to be inserted or can be detached through a hole (not shown) formed in the second side surface 100D of the second housing unit 120, for example. The pen input device 175 can be configured to be inserted or detachable in various other positions without being limited to Figure 1The pen input device 175 can be attached to the front surface 100A, the rear surface 100B, the first side surface 100C, or the second side surface 100D by using an attractive force of a magnetic material or various methods such as a mechanical fastening structure, for example. According to an embodiment, the pen input device 175 can be configured as an electromagnetic induction type (e.g., an electromagnetic resonance (EMR) type). The pen input device 175 can include a resonance circuit and can be associated with an electromagnetic induction panel (e.g., a digitizer) included in the electronic device 10. According to an embodiment, the flexible display 140 can be coupled to or disposed adjacent to the electromagnetic induction panel that detects the pen input device 175. According to various embodiments, the flexible display 140 can include the electromagnetic induction panel.

[0049] According to an embodiment, the pen input device 175 can be configured as an electromagnetic resonance (EMR) type, an active electrostatic stylus (AES), or an electrically coupled resonance (ECR) type. Depending on the configuration type of the pen input device 175, the electromagnetic induction panel can be omitted.

[0050] The sub-display 150 can be positioned inside the first housing unit 110 adjacent to the first rear cover 111, for example. A portion (not shown) of the first rear cover 111 can overlap the sub-display 150 and can be substantially transparent. In an embodiment, the sub-display 150 can be positioned inside the first housing unit 110 adjacent to the second rear cover 121. Figure 3 In the folded state of the electronic device 10, the electronic device 10 can output an image through the sub-display 150 instead of the flexible display 140, or in addition to the flexible display 140.

[0051] According to an embodiment (not shown), the electronic device 10 can be configured as an outer folding structure in which the screen is folded outward.

[0052] Figure 4 is an exploded perspective view of an example electronic device 10 according to various embodiments. Figure 1 is an exploded perspective view of an example electronic device 10 according to various embodiments.

[0053] Referring to Figure 4 In an embodiment, the electronic device 10 can include the first side member 112, the second side member 122, the first support member 411, the second support member 412, the hinge 430, the front cover 200, the first rear cover 111, the second rear cover 121, the hinge cover 130, the cover member 160, the flexible display 140, the first substrate assembly 421, the second substrate assembly 422, the first battery 441, the second battery 442, the third support member 451, the fourth support member 452, the wiring member 460, the camera assembly 470, the antenna 480, or the pen input device 175. In an embodiment, the electronic device 10 can omit at least one of the components or can additionally include another component. Figure 4Some of the redundant descriptions in the attached figures will not be repeated here.

[0054] The first support member (e.g., the first bracket) 411 may be provided, for example, in a... Figure 1 The first housing unit 110 is located inside and connected to the first side member 112, or is formed as a single unit with the first side member 112. In embodiments, the first support member 411 and the first side member 112 may be referred to as the first front housing. The second support member (e.g., a second bracket) 412 may be provided, for example, in... Figure 1 The second support member 411 is located inside the second housing unit 120 and connected to the second side member 122, or is formed as a single unit with the second side member 122. In embodiments, the second support member 412 and the second side member 122 may be referred to as the second front shell. The first support member 411 and / or the second support member 412 may be formed, for example, using metallic and / or non-metallic materials (e.g., polymers).

[0055] The hinge (or hinge assembly) 430 can connect, for example, a first support member 411 and a second support member 412. The first support member 411 is included. Figure 1 The first housing unit 110 and the second support member 412 Figure 1 The second housing unit 120 can rotate relative to each other via hinge 430.

[0056] The front cover 200 may include, for example, a first segment ①, a second segment ②, and a folding segment ③. The flexible display 140 may include a first portion 141 overlapping the first segment ①, a second portion 142 overlapping the second segment ②, and a folding portion 143 overlapping the folding segment ③. The first portion 141 may be disposed on the first support member 411, and the second portion 142 may be disposed on the second support member 412. The first substrate assembly 421 may be disposed on the first support member 411 between the first support member 411 and the first rear cover 111. The second substrate assembly 422 may be disposed on the second support member 412 between the second support member 412 and the second rear cover 121.

[0057] The first substrate assembly 421 may include, for example, a first printed circuit board (PCB) (not shown). The flexible display 140 includes... Figure 1 Camera components 181 and camera assembly 470 Figure 2 The second camera components 191 and 192 and the flash 193, Figure 1 Key input device 174, Figure 3The sub display 150 or other various electronic components not shown can be electrically connected to the first PCB. According to various embodiments, the first substrate assembly 421 can include the first PCB, a third PCB (not shown) disposed to partially overlap the first PCB, and / or an interposer (not shown) between the first PCB and the third PCB.

[0058] The second substrate assembly 422 can include, for example, a second PCB (not shown) electrically connected to the first PCB of the first substrate assembly 421. The second substrate assembly 422 can include various electronic components electrically connected to the second PCB. The electronic components can include, for example, a microphone using the microphone hole 171, a speaker using the speaker hole 172, or a connector using the connector hole 173.

[0059] The first battery 441 can be disposed on the first support member 411, for example, between the first support member 411 and the first back cover 111. The second battery 442 can be disposed on the second support member 412, for example, between the second support member 412 and the second back cover 121. The first battery 441 and / or the second battery 442 are devices for supplying power to at least one component of the electronic device 10, and can include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. In an embodiment, the first battery 441 or the second battery 442 can be integrally disposed inside the electronic device 10, or can be detachably disposed from the electronic device 10. According to an embodiment, the first battery 441 or the second battery 442 can be omitted.

[0060] The third support member (e.g., first back case) 451 can be disposed between the first support member 411 and the first back cover 111, for example, and can be coupled to the first support member 411 by a fastening element such as a bolt. At least a portion of the first substrate assembly 421 can be disposed between the first support member 411 and the third support member 451, and the third support member 451 can cover and protect the first substrate assembly 421. In an embodiment, the third support member 451 can function as an electromagnetic shield to reduce electromagnetic interference (e.g., electromagnetic interference (EMI)) on electronic components such as the first substrate assembly 421.

[0061] A fourth support member (e.g., a second rear case) 452 can be disposed, for example, between the second support member 412 and the second rear cover 121, and can be coupled to the second support member 412 by a fastening element such as a screw. At least a portion of the second board assembly 422 can be disposed between the second support member 412 and the fourth support member 452, and the fourth support member 452 can cover and protect the second board assembly 422. The third support member 451 and / or the fourth support member 452 can be formed using a metallic material and / or a non-metallic material (e.g., a polymer). In an embodiment, the fourth support member 452 can function as an electromagnetic shield to reduce electromagnetic interference (e.g., electromagnetic interference (EMI)) on electronic components such as the second board assembly 422. According to an embodiment, the third support member 451 or the fourth support member 452 can be omitted.

[0062] The antenna 480 can be disposed, for example, between the second support member 412 and the second rear cover 121. The antenna 480 can be configured in the form of a film (e.g., an FPCB). The antenna 480 can include at least one conductive pattern functioning as a loop-type radiator. For example, the at least one conductive pattern can include a planar spiral conductive pattern (e.g., a planar coil or a pattern coil). The antenna 480 can be electrically connected to a wireless communication circuit disposed on the first board assembly 421, and can be used for short-range wireless communication such as near field communication (NFC). In another example, the antenna 480 can be used for magnetic secure transmission (MST) that transmits and / or receives a magnetic signal. According to various embodiments, the antenna 480 can be electrically connected to a power transmission and reception circuit disposed on the first board assembly 421. The power transmission and reception circuit can wirelessly receive power from an external electronic device through a conductive pattern, or can wirelessly transmit power to an external electronic device.

[0063] Figure 5 is a cross-sectional view of a display assembly 500 in an unfolded state included in an example electronic device 10 according to various embodiments. Figure 1 is a cross-sectional view of a display assembly 500 in an unfolded state included in an example electronic device 10 according to various embodiments. Figure 6 is a cross-sectional view of a display assembly 500 in an unfolded state included in an example electronic device 10 according to various embodiments. Figure 5 is a cross-sectional view of a display assembly 500 in an unfolded state included in an example electronic device 10 according to various embodiments.

[0064] Referring to Figure 5 and Figure 6 In an embodiment, the display assembly 500 can include the front cover 200, the flexible display 140, or an optically transparent bonding member 560 between the front cover 200 and the flexible display 140. The front cover 200 and the optically transparent bonding member 560 can be substantially transparent, and light output from the flexible display 140 can advance through the optically transparent bonding member 560 and the front cover 200.

[0065] According to an embodiment, the flexible display 140 can include a folding portion 143 and first and second portions 141 and 142 positioned such that the folding portion 143 is between them. The front cover 200 can include a folding section ③ overlapping the folding portion 143, a first section ① overlapping the first portion 141, or a second section ② overlapping the second portion 142. When the electronic device 10 changes from an unfolded state Figure 1 to a folded state Figure 3 , the folding portion 143 of the flexible display 140 and the folding section ③ of the front cover 200 can be curved in an arc shape (see Figure 6 ). In the folded state Figure 3 , the first and second sections ① and ② can be positioned to face each other.

[0066] According to an embodiment, the front cover 200 can include a front surface 201 and a rear surface 202 positioned opposite the front surface 201. The front surface 201 of the front cover 200 can form the front surface 100A of the electronic device 10 in the unfolded state Figure 1 . The front and rear surfaces 201 and 202 can be substantially parallel, and the thickness T (e.g., the distance between the front and rear surfaces 201 and 202) of the front cover 200 can be substantially the same in the first section ①, the second section ②, and the folding section ③.

[0067] According to an embodiment, the front cover 200 can include a first layer 510, a second layer 520, or a third layer 530. The first layer 510 can form the front surface 201 of the front cover 200. The second layer 520 can be located between the first layer 510 and the flexible display 140, and can form the rear surface 202 of the front cover 200. The third layer 530 can be located between the first layer 510 and the second layer 520.

[0068] According to an embodiment, the first layer 510 can include glass. The glass can be formed, for example, using elements such as selenium and sulfur, oxides such as silicon, boron, and germanium, or inorganic materials such as oxide salts, sulfides, selenides, and halides. The glass can include, for example, a substantially network material, or can further include an auxiliary material chemically bonded thereto to have properties such as mechanical strength, chemical durability, transparency, or electrical insulation. For example, the first layer 510 can be formed by an operation of forming a thin glass and an operation of reinforcing the thin glass. The thin glass can have, for example, a thickness of about 100 micrometers (µm) to about 1000 µm. The operation of reinforcing the thin glass can include, for example, injecting a special material into the thin glass to a predetermined depth or more. The first layer 510 can form the front surface 100A of the electronic device 10 in the unfolded state Figure 1), and can have a natural smoothness or surface flatness of glass. The front cover 200 including glass can have a higher hardness and / or excellent scratch resistance than a plastic film (e.g., a polyimide film).

[0069] According to various embodiments, the first layer 510 can include glass having various optical properties. For example, the first layer 510 can be configured to allow or not allow a specific waveband (such as ultraviolet rays or infrared rays) to pass through.

[0070] According to various embodiments, the first layer 510 can include glass having a relatively low dielectric constant to prevent energy loss due to the glass. For example, the first layer 510 can include glass having a relatively low dielectric loss. Accordingly, performance degradation of at least one component (e.g., an electromagnetic induction panel, a touch sensing circuit, or an antenna) forming an electric or magnetic field toward the front cover 200 can be reduced. In an embodiment, when sodium ions or the like are present in the glass, electric charges can be transmitted (ion conduction) under the action of an electric field, and thus the first layer 510 can include glass having a low alkali content (such as sodium).

[0071] According to an embodiment, the first layer 510 can include a first area 511 included in the first section ①, a second area 512 included in the second section ②, or a folding area 513 included in the folding section ③. The first area 511 and / or the second area 512 can have a first thickness T1, and at least a portion of the folding area 513 can have a second thickness T2 less than the first thickness T1. The folding area 513 can include a recess 514 formed to face the third layer 530. In the first layer 510, due to the recess 514, the folding section ③ can have a smaller thickness than the first section ① and the second section ②. The second thickness T2 of the folding area 513 can correspond to a thickness that allows the folding area 513 having a length L connecting the first area ① and the second area ② to be bent with a radius of curvature R (e.g., about 1.5 mm) without damage in a folded state as Figure 6 The first area 511 is a portion that is not bendable compared to the folding area 513, and can provide rigidity to the first section ①. The second area 512 is a portion that is not bendable compared to the folding area 513, and can provide rigidity to the second section ②. According to an embodiment, the first thickness T1 of the first area 511 and / or the second area 512 can be a value ranging from about 100 µm to about 1000 µm, and the second thickness T2 of the folding area 513 can have a value less than the first thickness T1 and ranging from about 10 µm to about 100 µm.

[0072] According to various embodiments, the folding area 513 can include a first rib 515 connected adjacent to the first area 511. The first rib 515 can include a first slope 515a connecting surfaces (not shown) having different heights due to a difference in thickness between the first area 511 and the folding area 513. The folding area 513 can include a second rib 516 connected adjacent to the second area 512. The second rib 516 can include a second slope 516a connecting surfaces (not shown) having different heights due to a difference in thickness between the second area 512 and the folding area 513. The first slope 515a and / or the second slope 516a can include a curved surface. The first rib 515 can prevent stress from being concentrated on a connection portion between the first area 511 and the folding area 513 when the folding section ③ is bent. The first rib 515 can provide resistance to enable the connection portion between the first area 511 and the folding area 513 to withstand impact when the folding section ③ is bent. The second rib 516 can prevent stress from being concentrated on a connection portion between the second area 512 and the folding area 513 when the folding section ③ is bent. The second rib 516 can provide resistance to enable the connection portion between the second area 512 and the folding area 513 to withstand impact when the folding section ③ is bent.

[0073] According to various embodiments, the recess 514 can be formed by using various methods such as a laser, a CNC machining, a scraping, a sandblasting, a polishing, or an etching (e.g., a chemical etching).

[0074] According to an embodiment, the third layer 530 can reinforce the first layer 510. For example, impact resistance or durability of the first layer 510 can be reinforced by the third layer 530. The folding area 513 has a smaller thickness than the first area 511 and the second area 512, and thus can be relatively vulnerable to external impact or external pressure. For example, when a user input is performed by a pen tip 175a of the pen input device 175 being in contact with the first layer 510, the folding area 513 can have a risk of being damaged by external impact or external pressure applied by the pen tip 175a due to the smaller thickness than the first area 511 and the second area 512. To have flexibility without damage, the folding area 513 can have a limitation in increasing its thickness. According to an embodiment, the third layer 530 coupled to the first layer 510 can prevent the first layer 510 from being damaged by external impact or external pressure applied to the first layer 510. The third layer 530 can mitigate stress that can occur in the first layer 510 due to external impact or external pressure.

[0075] According to an embodiment, the third layer 530 can have a hardness that prevents damage to the folding area 513 by external impact or external pressure. For example, when a user input is performed by the pen tip 175a of the pen input device 175 being in contact with the folding area 513, the hardness of the third layer 530 can provide resistance to local plastic deformation of the folding area 513 due to external impact or external pressure caused by the pen input device 175, thereby preventing the folding area 513 from being damaged. According to an embodiment, the third layer 530 can have a hardness of about 20 to about 90 based on the Shore D hardness scale. The thickness of the third layer 530 in the folding section ③ can be formed based on its material (or based on the mechanical properties of the material, such as hardness) to reduce the reduction in flexibility of the folding section ③. For example, when the third layer 530 is formed using a material having a first hardness, the third layer 530 can have a first thickness in the folding section ③, and when the first layer 510 is formed using a material having a second hardness greater than the first hardness, the third layer 530 can have a second thickness less than the first thickness in the folding section ③. According to an embodiment, the third layer 530 can have elasticity (or elastic force) to substantially recover without a predetermined deformation when the cover 200 changes from the folded state of Figure 6 to the unfolded state of Figure 5 .

[0076] The third layer 530 can include, for example, a first engagement surface 532a of the first section ①, a second engagement surface 532b of the second section ②, and a third engagement surface 532c of the folding section ③, as an engagement surface with the second layer 520. According to an embodiment, the third engagement surface 532c of the folding section ③ can include a pattern 533 including a plurality of grooves or protrusions. The pattern 533 including a plurality of grooves can reduce the reduction in flexibility of the folding section ③ due to the third layer 530 being engaged to the first layer 510. For example, when the third engagement surface 532c is formed to be smoothly connected to the first engagement surface 532a and the second engagement surface 532b as indicated by reference numeral "532d", the thickness T3 of the third layer 530 in the folding section ③ reduces the flexibility of the folding section ③. According to an embodiment, the third engagement surface 532c can include a pattern 533 of a plurality of grooves in a concave shape toward the first layer 510, thus reducing the reduction in flexibility of the folding section ③ due to the third layer 530 being engaged to the first layer 510. According to an embodiment, the third engagement surface 532c can be configured in a convex shape toward the first layer 510 as indicated by reference numeral "532e".

[0077] According to an embodiment, the plurality of grooves included in the pattern 533 can have a triangular cross-section. According to various embodiments, the number or cross-sectional shape of the plurality of grooves included in the pattern 533 can vary without being limited to Figure 5The gaps between the plurality of grooves included in the pattern 533 can be constant, or can not be constant in embodiments.

[0078] Figure 7a is a cross-sectional view of an example front cover 200 according to various embodiments. Figure 7b is a cross-sectional view of an example front cover 200 according to various embodiments. Referring to Figure 7a In various embodiments, the pattern 733a formed on the third bonding surface 532c in the folding section ③ can include a plurality of grooves having a rectangular cross-sectional shape. Referring to Figure 7b In various embodiments, the pattern 733b formed on the third bonding surface 532c in the folding section ③ can have a plurality of grooves having a curved surface facing the first layer 510, as compared to embodiments of Figure 7a In various embodiments, the pattern 733b formed on the third bonding surface 532c in the folding section ③ can have a plurality of grooves having a curved surface facing the first layer 510, as compared to embodiments of

[0079] Referring to Figure 5 or Figure 6 In embodiments, the second layer 520 can cover the third layer 530 to form a smooth rear surface 202 for bonding with the flexible display 140. The second layer 520 can have a hardness or ductility that reduces a decrease in flexibility of the folding section ③ due to the second layer 520 bonded to the third layer 530. For example, the second layer 520 can have a lower hardness than the third layer 530. For example, the second layer 520 can have a higher ductility than the third layer 530. According to embodiments, the second layer 520 can have an elongation of about 4% to about 20%. When the front cover 200 changes from the folded state of Figure 6 to the unfolded state of Figure 5 The second layer 520 can be at least partially affected by the elasticity (or restoring force) of the third layer 530, and thus substantially recover without a predetermined deformation, when the front cover 200 changes from the folded state of

[0080] According to embodiments, the second layer 520 or the third layer 530 can include an acryl-based, urethane-based, or silicone-based organic material.

[0081] According to an embodiment, the front cover 200 can be configured by stacking the second layer 520 and the third layer 530 on the first layer 510 including the recess 514. For example, the second layer 520 or the third layer 530 can be formed using an ultraviolet (UV) molding liquid. The first layer 510 can be placed on a mold (e.g., a UV molding mold) into which the UV molding liquid is injected, and then pressed with a roller, and thus the UV molding liquid can be uniformly spread between the first layer 510 and the mold. According to an embodiment, a primer can be applied to the first layer 510 by a method such as vacuum deposition or sputtering, after which the first layer 510 can be placed on a mold into which the UV molding liquid is injected, and then pressed. In this case, although not shown in Figure 5 or Figure 6 a bonding layer including a primer can be disposed between the first layer 510 and the third layer 530. The bonding layer including the primer can closely bond the first layer 510 and the third layer 530, thereby improving the bonding strength therebetween. When the first layer 510 is irradiated with ultraviolet rays, the UV molding liquid can be cured in reaction with the ultraviolet rays that pass through the first layer 510, thereby forming a sheet in the form that the third layer 530 is attached to the first layer 510. The pattern 533 of the third layer 530 can be formed by substantially transferring a pattern included in a mold. The sheet including the first layer 510 and the third layer 530 can be placed on a mold (e.g., a UV molding mold) into which the UV molding liquid is injected, and then pressed with a roller, and thus the UV molding liquid can be uniformly spread between the third layer 530 and the mold. According to various embodiments, a primer can be applied to the sheet, after which the sheet can be placed on a mold into which the UV molding liquid is injected, and pressed with a roller. In this case, although not shown in Figure 5 or Figure 6 a bonding layer including a primer can be disposed between the second layer 520 and the third layer 530. The bonding layer including the primer can closely bond the second layer 520 and the third layer 530, thereby improving the bonding strength therebetween. When the sheet is irradiated with ultraviolet rays, the UV molding liquid can be cured in reaction with the ultraviolet rays that pass through the sheet, thereby forming the front cover 200 in the form that the second layer 520 is attached to the sheet. According to various embodiments, the front cover 200 can be formed by externally processing a composite sheet manufactured by stacking a plurality of layers on a glass sheet. The composite sheet can include a plurality of regions corresponding to the front cover 200, and can be manufactured by a substantially same method as the method of stacking the second layer 520 and the third layer 530 on the first layer 510 by using a UV molding liquid. The front cover 200 can be formed by various other stacking methods.

[0082] According to an embodiment, in Figure 6In the folded state of the electronic device 10, the first section ① and the second section ② can be substantially parallel, or can form a narrow angle (e.g., an angle of about 0 degrees to about 10 degrees). In the folded state of the electronic device 10, the third section ③ can be curved with a radius of curvature R. The radius of curvature R can be provided to prevent the front cover 200 and the flexible display 140 from being damaged due to internal stress caused by the bending, while achieving slimness (e.g., minimizing a separation distance between the first section ① and the second section ②) of the electronic device 10 (see FIG. 1) in the folded state. Figure 6 In the folded state of the electronic device 10, the third section ③ can be curved with a radius of curvature R. The radius of curvature R can be provided to prevent the front cover 200 and the flexible display 140 from being damaged due to internal stress caused by the bending, while achieving slimness (e.g., minimizing a separation distance between the first section ① and the second section ②) of the electronic device 10 (see Figure 3 ) in the folded state. The radius of curvature R can be formed based on the folding structure of the foldable housing 100. Figure 1

[0083] According to an embodiment, the third layer 530 can include a material for increasing an interfacial bonding force (or bonding strength) with the first layer 510. The third layer 530 can include a material for increasing an interfacial bonding force with the second layer 520. The interfacial bonding force can include a mechanical strength representing resistance to damage caused by an external force, or an environmental strength representing resistance to damage caused by an environment (e.g., water and heat). According to an embodiment, the third layer 530 can include a material that can be firmly bonded to both the first layer 510 and the second layer 520.

[0084] According to an embodiment, the third layer 530 can include a material for minimizing a difference in refractive index between the first layer 510 and the third layer 530. When the difference in refractive index between the first layer 510 and the third layer 530 is minimized, the reflectivity of the interface between the first layer 510 and the third layer 530 can be reduced. When the reflectivity of the interface between the first layer 510 and the third layer 530 is reduced, reflection on the interface and light loss due to the reflection can be reduced, and thus a clear image can be displayed on the screen. According to an embodiment, the difference in refractive index between the first layer 510 and the third layer 530 can be about 0.01 or less, which is a level capable of ensuring a clear image.

[0085] According to an embodiment, the first layer 510 and the third layer 530 can be bonded substantially without an air gap. The air gap can cause loss of light from the flexible display 140, and thus cause deterioration of image quality. The third layer 530 can be formed by applying a liquid material and then curing the liquid material, thereby reducing occurrence of an air gap between the first layer 510 and the third layer 530.

[0086] ​According to an embodiment, the second layer 520 can include a material for minimizing a difference in refractive index between the third layer 530 and the second layer 520. When the difference in refractive index between the second layer 520 and the third layer 530 is minimized, reflectivity of the interface between the second layer 520 and the third layer 530 can be reduced. When the reflectivity of the interface between the second layer 520 and the third layer 530 is reduced, reflection on the interface and light loss due to the reflection can be reduced, and thus a clear image can be displayed on the screen. According to an embodiment, the difference in refractive index between the second layer 520 and the third layer 530 can be about 0.01 or less, which is a level capable of ensuring a clear image.

[0087] According to an embodiment, the second layer 520 and the third layer 530 can be joined substantially without an air gap. An air gap can cause a loss of light from the flexible display 140, and thus cause deterioration of image quality. The second layer 520 can be formed by applying a liquid material and then curing the liquid material, thereby reducing the occurrence of an air gap between the second layer 520 and the third layer 530.

[0088] According to an embodiment, the optically transparent joining member 560 can include a material for minimizing a difference in refractive index between the front cover 200 (e.g., the second layer 520) and the flexible display 140. When the difference in refractive index between the front cover 200 and the flexible display 140 is minimized due to the optically transparent joining member 560, reflection of the interface between the front cover 200 and the flexible display 140 can be reduced due to the optically transparent joining member 560. When the reflection of the interface between the front cover 200 and the flexible display 140 is reduced due to the optically transparent joining member 560, reflection on the interface and light loss due to the reflection can be reduced, and thus a clear image can be displayed on the screen. According to an embodiment, the difference in refractive index between the front cover 200 and the flexible display 140 can be about 0.01 or less, which is a level capable of ensuring a clear image.

[0089] According to an embodiment, the optically joining member 560 can include an optically clear adhesive (OCA), an optically clear resin (OCR), or a super view resin (SVR). The front cover 200 and the flexible display 140 can be joined without an air gap by the optically transparent joining member 560. An air gap can cause a loss of light from the flexible display 140, and thus cause deterioration of image quality. The air gap between the front cover 200 and the flexible display 140 can be filled with the optically transparent joining member 560, and thus a loss of light output from the flexible display 140 can be reduced, thereby displaying a clear image on the screen.

[0090] According to an embodiment, the flexible display 140 can include a display panel 610 and a lower panel 620 bonded to the display panel 610. Bonding members (not shown) of various polymers can be disposed between the display panel 610 and the lower panel 620. An optically transparent bonding member 560 can be disposed between the second layer 520 of the front cover 200 and the display panel 610 of the flexible display 140. The display panel 610 can be disposed between the optically transparent bonding member 560 and the lower panel 620. The display panel 610 can include a light emitting layer 611. The light emitting layer 611 can include, for example, a plurality of pixels configured with light emitting devices such as organic light emitting diodes (OLEDs) or micro LEDs. The light emitting layer 611 can include at least one thin film transistor (TFT) for controlling the plurality of pixels. The at least one TFT can control a current to the light emitting device to turn on or off the pixels or adjust the brightness of the pixels. The at least one TFT can be configured as, for example, an amorphous silicon (a-Si) TFT or a low temperature poly silicon (LTPS) TFT. The light emitting layer 611 can include a storage capacitor that can hold a voltage signal to the pixels, can hold a voltage applied to the pixels within a frame, or can reduce a change in a gate voltage of the TFT due to current leakage during a light emitting time. The storage capacitor can hold a voltage applied to the pixels at predetermined time intervals through a routine (e.g., initialization or data writing) of the at least one TFT.

[0091] In an embodiment, the light emitting layer 611 can include a pixel layer, a thin film transistor (TFT) film, and / or encapsulation (or an encapsulation layer) (e.g., a thin film encapsulation (TFE)). The pixel layer can include, for example, a plurality of pixels configured with light emitting devices such as OLEDs or micro-LEDs. The pixel layer can be disposed on the TFT film by organic evaporation. The TFT film can be located between the pixel layer and the base film. The TFT film can refer to a film structure in which at least one TFT is disposed on a flexible substrate (e.g., a PI film) through a series of processes such as deposition, patterning, and etching. The at least one TFT can control a current to the light emitting device of the pixel layer to turn on or off the pixel or adjust the brightness of the pixel. The at least one TFT can be configured as, for example, an amorphous silicon (a-Si) TFT, a liquid crystal polymer (LCP) TFT, a low temperature polyoxide (LTPO) TFT, or a low temperature poly silicon (LTPS) TFT. The light emitting layer 611 can include a storage capacitor that can hold a voltage signal to the pixel, can hold a voltage applied to the pixel for a frame, or can reduce a change in a gate voltage of the TFT due to current leakage during a light emitting time. The storage capacitor can hold a voltage applied to the pixel at a predetermined time interval through a routine (e.g., initialization or data writing) of the at least one TFT. In an embodiment, the light emitting layer 611 can be configured based on an OLED, and the encapsulation can cover the pixel layer. The organic material and the electrode that emit light in the OLED are very sensitive to oxygen and / or moisture, and thus can lose light emitting characteristics. The encapsulation can seal the pixel layer to prevent oxygen and / or moisture from penetrating into the OLED. The base film can include a flexible film formed using a polymer such as polyimide or polyethylene terephthalate (PET) or plastic. The base film can be used to support and protect the light emitting layer 611. In an embodiment, the base film can be referred to as a protection film, a back film, or a back plate.

[0092] The display panel 610 can include an optical layer 612 disposed between the light emitting layer 611 and the optically transparent bonding member 560. An optically transparent bonding member (not shown) such as an OCA, an OCA, an OCR, or an SVR can be disposed between the light emitting layer 611 and the optical layer 612. The optical layer 612 can improve the image quality of the screen. The optical layer 612 can include, for example, a retardation layer (or retarder) or a polarization layer (or polarizer) disposed between the retardation layer and the front cover 200. The polarization layer and the retardation layer can improve the outdoor visibility of the screen. According to various embodiments, a single layer in which the polarization layer and the retardation layer are combined can be provided, and the layer can be defined as a "circular polarization layer". In an embodiment, the polarization layer (or the circular polarization layer) can be omitted, in which case a black pixel definition layer (PDL) and / or a color filter can be included instead of the polarization layer.

[0093] According to an embodiment, the lower panel 620 can include a plurality of layers 620-1,..., 620-n (n ≥ 2) for various functions. Bonding members (not shown) of various polymers can be disposed between the plurality of layers 620-1,..., 620-n. Some of the plurality of layers 620-1,..., 620-n included in the lower panel 620 can protect the display panel 610 from external impacts while supporting the display panel 610. Some of the plurality of layers 620-1,..., 620-n included in the lower panel 620 can block external light or light generated from the display panel 610. Some of the plurality of layers 620-1,..., 620-n included in the lower panel 620 (e.g., reference numeral "620-1") can absorb or block electromagnetic waves, and can be formed using various conductive materials (e.g., copper). Some of the plurality of layers 620-1,..., 620-n included in the lower panel 620 (e.g., reference numeral "620-1") can diffuse, disperse, or radiate heat. The lower panel 620 can include various layers having various other functions.

[0094] According to an embodiment, the lower panel 620 can include a light-blocking layer, a buffer layer, or a lower layer. The light-blocking layer can be located between, for example, a base film of the display panel 610 and the buffer layer. The buffer layer can be located between the light-blocking layer and the lower layer. The light-blocking layer can at least partially block light incident from the outside. For example, the light-blocking layer can include an embossing layer. The embossing layer can be a black layer including an uneven pattern. The buffer layer can mitigate external impacts applied to the flexible display 140. For example, the buffer layer can include a sponge layer or a cushion layer. The lower layer can diffuse, disperse, or radiate heat generated from the electronic device 10 (see FIG. 1) or the display panel 610. The lower layer can include a metal layer or a plastic layer. The lower layer can include a layer having a function of blocking electromagnetic waves. Figure 1) or heat generated by the flexible display 140. The lower layer can absorb or block electromagnetic waves. The lower layer can mitigate external impact applied to the electronic device 10 or the flexible display 140. For example, the lower layer can include a composite sheet or a conductive sheet. In an embodiment, the composite sheet can be a sheet in which layers or sheets having different properties are combined and processed. For example, the composite sheet can include at least one of polyimide or graphite. The composite sheet can be replaced with an integral sheet including one material (e.g., polyimide or graphite). The composite sheet can be located between the buffer layer and the conductive sheet. The conductive sheet can be used to shield the flexible display 140 from EMI. The conductive sheet can include various different metallic materials (e.g., copper). In an embodiment, at least a portion of the lower layer can be a conductive member (e.g., a metal plate), which can help to enhance rigidity of the electronic device 10 or the flexible display 140, and can be used to block ambient noise and disperse heat emitted from peripheral heat-releasing components (e.g., display driving circuitry (e.g., DDI)). The conductive member can include at least one of, for example, copper (Cu), aluminum (Al), stainless steel (SUS), or CLAD (e.g., a stacked member in which SUS and Al are alternately disposed). The lower layer can include various layers for various other functions. According to various embodiments (not shown), at least one additional polymer layer (e.g., a layer including PI, PET, or TPU) can be disposed on the rear surface of the display panel 610 in addition to the base film. In various embodiments, at least one of the plurality of layers (e.g., a light-blocking layer, a buffer layer, a composite sheet, and a conductive sheet) included in the lower panel 620 can be omitted. In various embodiments, the arrangement order of the plurality of layers included in the lower panel 620 is not limited to the illustrated example and can be variously changed.

[0095] According to an embodiment, some of the plurality of layers 620-1,..., 620-n included in the lower panel 620 can include a digitizer for detecting the pen input device 175. The digitizer can be, for example, an electromagnetic induction panel for sensing a magnetic field type pen input device. In an embodiment, the electromagnetic induction panel (e.g., digitizer) can be located between a buffer layer and a lower layer of the lower panel 620. In an embodiment, the electromagnetic induction panel can be located between a conductive sheet of the lower layer included in the lower panel 620 and a composite sheet. In an embodiment, the electromagnetic induction panel can be located between a light blocking layer and a buffer layer of the lower panel 620. The electromagnetic induction panel can be configured in the form of a flexible film or a flexible sheet, for example. The electromagnetic induction panel can be formed using a flexible PCB, for example. When an alternating current is supplied to the electromagnetic induction panel, an electromagnetic field can be formed by a plurality of electrode patterns included in the electromagnetic induction panel. The pen input device 175 can be configured in an electromagnetic induction type (e.g., electromagnetic resonance (EMR) type). The pen input device 175 can include a resonance circuit, and the resonance circuit can be associated with the electromagnetic induction panel. When a pen tip of the pen input device 175 approaches the screen of the electronic device 10, a current can flow in a coil included in the resonance circuit of the pen input device 175 by electromagnetic induction. The pen input device 175 can generate a signal (e.g., a radio frequency signal) (e.g., a position signal, a pen pressure signal, and / or an angle signal) related to a user input on the screen using energy supplied from the electromagnetic induction panel, and can transmit the signal to the screen (e.g., electromagnetic induction panel). The electromagnetic induction panel can include a shielding sheet. The shielding sheet can prevent mutual interference between components included in the electronic device 10, which is caused by electromagnetic fields generated by the components. The shielding sheet can block electromagnetic fields generated by the components, thereby enabling input from the pen input device 175 to be accurately transmitted to the coil included in the electromagnetic induction panel. In an embodiment, the electromagnetic induction panel can be defined as a component of the flexible display 140. According to an embodiment, the pen input device 175 can be configured in an active electrostatic pen (AES) method or an electrically coupled resonance (ECR) type. In this case, the electromagnetic induction panel can be omitted. For example, in an embodiment in which the pen input device 175 generates a signal by using power of a battery included in the pen input device 175, the electromagnetic induction panel can be omitted.

[0096] According to an embodiment (not shown), the flexible display 140 can include a touch sensing circuit (e.g., a touch sensor). The touch sensing circuit can be configured with a transparent conductive layer (or film) based on various conductive materials such as indium tin oxide (ITO). According to an embodiment, the touch sensing circuit can be disposed between the front cover 200 and the optical layer 612 (e.g., an add-on type). According to another embodiment, the touch sensing circuit can be disposed between the optical layer 612 and the light emitting layer 611 (e.g., an on-cell type). According to still another embodiment, the light emitting layer 611 can include the touch sensing circuit or a touch sensing function (e.g., an in-cell type).

[0097] According to various embodiments (not shown), the flexible display 140 can further include a pressure sensor capable of measuring intensity (pressure) of a touch.

[0098] According to various embodiments (not shown), the display panel 610 can be based on an OLED, and can include an encapsulation layer (e.g., a thin film encapsulation (TFE)) disposed between the light emitting layer 611 and the optical layer 612. The encapsulation layer can seal the light emitting layer 611 to prevent oxygen and / or moisture from permeating into the OLED. According to various embodiments (not shown), the flexible display 140 can include a conductive pattern such as a metal mesh (e.g., an aluminum metal mesh) as a touch sensing circuit disposed on the encapsulation layer and the optical layer 612. For example, in response to bending of the flexible display 140, the metal mesh can have higher durability than a transparent conductive layer configured with ITO.

[0099] According to various embodiments, the plurality of layers included in the display panel 610 or the lower panel 620, a stack structure thereof, or a stack order thereof can vary. According to various embodiments, the flexible display 140 can be configured by omitting some of the described components or adding other components according to a form or convergence trend thereof.

[0100] According to an embodiment, the impact resistance of the first layer 510 including glass can be improved by strengthening. The strengthening can include, for example, a method (e.g., an ion exchange method) of substituting sodium on a surface of the first layer 510 with potassium having a large ionic radius and applying a compressive stress to the surface as a chemical strengthening. The glass can swell after the chemical strengthening. Because the folding area 513 is thinner than the first area 511 or the second area 512 in the first layer 510, the amount of swelling of the first area 511 and / or the second area 512 after the chemical strengthening can be different from the amount of swelling of the folding area 513. Accordingly, the first section ① and / or the second section ② can be deformed to be uneven after the chemical strengthening. Hereinafter, Figure 8 Another embodiment for preventing the first layer 510 from being deformed due to the non-uniform thickness of the glass in the chemical strengthening is illustrated.

[0101] Figure 8 is an example display assembly 800 in an unfolded state according to various embodiments. Figure 1 is a cross-sectional view of an example display assembly 800 in an unfolded state according to various embodiments.

[0102] Referring to Figure 8 In an embodiment, the display assembly 800 can include a front cover 200, a flexible display 140, or an optically transparent bonding member 860 (e.g., OCA, OCA, OCR, or SVR) between the front cover 200 and the flexible display 140. The front cover 200 and the optically transparent bonding member 860 can be substantially transparent, and light output from the flexible display 140 can advance through the optically transparent bonding member 860 and the front cover 200. Figure 8 Excessive descriptions of some reference numerals of

[0103] According to an embodiment, the front cover 200 can include a folding section ③ overlapping the folding portion 143 of the flexible display 140, a first section ① overlapping the first portion 141 of the flexible display 140, or a second section ② overlapping the second portion 142 of the flexible display 140. The front cover 200 can include a front surface 201 and a rear surface 202 positioned opposite the front surface 201. The front surface 201 of the front cover 200 can form Figure 1 a front surface 100A of the electronic device 10 of FIG. 1. The front surface 201 and the rear surface 202 can be substantially parallel, and a thickness (e.g., a distance between the front surface 201 and the rear surface 202) of the front cover 200 can be substantially the same in the first section ①, the second section ②, and the folding section ③.

[0104] According to an embodiment, the front cover 200 can include a first layer 810, a second layer 820, a third layer 830, a fourth layer 840, or a fifth layer 850. The first layer 810 can form the front surface 201 of the front cover 200. The second layer 820 can form the rear surface 202 of the front cover 200. The third layer 830 can be located between the first layer 810 and the second layer 820. The fourth layer 840 and the fifth layer 850 can be located between the third layer 830 and the second layer 820.

[0105] According to an embodiment, the first layer 810 can include glass. A thickness T4 of the first layer 810 can be substantially the same in the first section ①, the second section ②, and the folding section ③. The first layer 810 can form the front surface 100A of the electronic device 10 (see FIG. 1). Figure 1). The first layer 810 can have a thickness T4 of about 10 µm to about 100 µm, and the folded section ③ can have flexibility. The first layer 810 can be formed by a thin glass forming operation and a thin glass reinforcing operation. Reinforcing can include, for example, a method of chemical strengthening such as an ion exchange method in which sodium on a surface of the first layer 810 is replaced with potassium having a large ionic radius and a compressive stress is applied to the surface. The glass can swell after chemical strengthening. Because the first layer 810 has a uniform thickness T4, the amount of swelling after chemical strengthening can be substantially constant in the first section ①, the second section ②, and the folded section ③.

[0106] According to various embodiments, the first layer 810 can include glass having various optical properties. For example, the first layer 810 can be configured to allow or not allow a specific waveband such as ultraviolet rays or infrared rays to pass through.

[0107] According to various embodiments, the first layer 810 can include glass having a relatively low dielectric constant to prevent energy loss due to the glass. For example, the first layer 810 can include glass having a relatively low dielectric loss. Accordingly, performance degradation of at least one component forming an electric field or a magnetic field toward the front cover 200 can be reduced. In another embodiment, when sodium ions or the like are present in the glass, electric charges can be transported (ion conduction) under the action of an electric field, and thus the first layer 810 can include glass having a low alkali content such as sodium.

[0108] According to an embodiment, the third layer 830 can reinforce the first layer 810. For example, the impact resistance or durability of the first layer 810 can be reinforced by the third layer 830. The first layer 810 formed using thin glass can be vulnerable to external impact or external pressure. For example, when user input is performed by the pen tip 175a of the pen input device 175 coming into contact with the first layer 810, the first layer 810 can have a risk of being damaged by external impact or external pressure applied by the pen tip 175a. To have flexibility without damage, the first layer 810 can have limitations in increasing its thickness. According to an embodiment, the third layer 830 bonded to the first layer 810 can prevent the first layer 810 from being damaged by external impact or external pressure applied to the first layer 810. The third layer 830 can mitigate stress that can occur in the first layer 810 due to external impact or external pressure.

[0109] According to an embodiment, the third layer 830 can have a hardness that prevents damage to the first layer 810 by external impact or external pressure. For example, the third layer 830 can have a hardness of about 20 to about 90 based on the Shore D hardness scale. The third layer 830 can include a fourth region 831 included in the first section ①, a fifth region 832 included in the second section ②, and a sixth region 833 included in the folding section ③. The thickness of the sixth region 833 can be formed based on the material of the third layer 830 (or based on the mechanical properties of the material, such as hardness) to reduce the reduction in flexibility of the folding section ③. According to an embodiment, the third layer 830 can have elasticity to substantially recover without a predetermined deformation when the front cover 200 changes from a folded state (not shown) to an unfolded state of the first layer 810. Figure 8

[0110] According to an embodiment, the fourth layer 840 can be located between the fourth region 831 of the third layer 830 and the second layer 820. The fifth layer 850 can be located between the fifth region 832 of the third layer 830 and the second layer 830. The sixth region 833 can extend between the fourth layer 840 and the fifth layer 850. At least a portion of the sixth region 833 can have a thickness greater than the thickness T5 of the fourth region 831 and the thickness T6 of the fifth region 832. According to an embodiment, the sixth region 833 can include a pattern 834 formed on the bonding surface 832c with the second layer 820, and the pattern 834 can include a plurality of grooves or protrusions. According to an embodiment, the pattern 834 can be located between the fourth layer 840 and the fifth layer 850. The pattern 834 including a plurality of grooves can reduce the reduction in flexibility of the folding section ③ due to the third layer 830 bonded to the first layer 810. For example, when the bonding surface 832c is formed without protrusions as indicated by reference numeral "832d", the thickness T7 of the sixth region 833 reduces the flexibility of the folding section ③. According to an embodiment, the bonding surface 832c can include a pattern 834 of a plurality of grooves in a concave shape toward the first layer 810, thus reducing the reduction in flexibility of the folding section ③ due to the third layer 830 bonded to the first layer 810.

[0111] According to an embodiment, the plurality of grooves included in the pattern 834 can have a triangular cross-section. According to various embodiments, the number or cross-sectional shape of the plurality of grooves included in the pattern 834 can vary without being limited to Figure 8 the embodiments. For example, the cross-sectional shape of the plurality of grooves included in the pattern 834 can correspond to the cross-sectional shape of the plurality of grooves included in the pattern 733a according to the embodiment of Figure 7a or the cross-sectional shape of the plurality of grooves included in the pattern 733b according to the embodiment of Figure 7b . The gap between the plurality of grooves included in the pattern 834 can be constant, or can not be constant in an embodiment. ​

[0112] According to an embodiment, the fourth layer 840 and / or the fifth layer 850 can include glass. The thickness of the fourth layer 840 (e.g., the height between the second layer 820 and the third layer 830) can be substantially constant. The thickness of the fifth layer 850 (e.g., the height between the second layer 820 and the third layer 830) can be substantially constant. According to an embodiment, the thickness of the fourth layer 840 and the thickness of the fifth layer 850 can be substantially the same. According to an embodiment, the fourth layer 840 and / or the fifth layer 850 can have a thickness greater than the thickness of the first layer 810. For example, the fourth layer 840 and / or the fifth layer 850 can have a thickness greater than the thickness of the first layer 810, and can be formed to have a thickness of about 50 µm to about 500 µm. The fourth layer 840 is a portion that is substantially not bendable without damage, and can provide rigidity to the first section ①. The fifth layer 850 is a portion that is substantially not bendable without damage, and can provide rigidity to the second section ②.

[0113] According to an embodiment, the second layer 820 can cover the sixth area 833 of the third layer 830, the fourth layer 840, and the fifth layer 850 to form a smooth rear surface 202 for engagement with the flexible display 140. The second layer 820 can have a hardness or ductility that reduces the decrease in flexibility of the folding section ③ due to the second layer 820. For example, the second layer 820 can have a lower hardness than the third layer 830. According to an embodiment, the second layer 820 can have a hardness of about 20 or less based on the Shore D hardness scale. For example, the second layer 820 can have a higher ductility than the third layer 830. According to an embodiment, the second layer 820 can have an elongation of about 4% to about 20%. When the front cover 200 changes from a folded state (not shown) to an unfolded state Figure 8 of the third layer 830, and thus substantially recovers without a predetermined deformation.

[0114] According to an embodiment, the second layer 820 or the third layer 830 can include an acryl-based, urethane-based, or silicone-based organic material.

[0115] According to an embodiment, in the folded state Figure 3 of the third layer 830, the first section ① and the second section ② can be substantially parallel, or can form a narrow angle (e.g., an angle of about 0 degrees to about 10 degrees). In the folded state Figure 3 of the third layer 830, the third section ③ can be bent with a corresponding radius of curvature. The radius of curvature can be provided to prevent damage to the front cover 200 and the flexible display 140 due to internal stress caused by bending, while achieving slimness (e.g., minimizing the separation distance between the first section ① and the second section ②) of the electronic device 10 (see Figure 3 ) in the folded state.

[0116] According to various embodiments, the fourth area 831 can include a first rib 815 connected adjacent to the sixth area 833. Due to a difference in thickness between the fourth area 831 and the sixth area 833, the first rib 815 can include a first slope 815a connecting surfaces (not shown) having different heights. The fifth area 832 can include a second rib 816 connected adjacent to the sixth area 833. Due to a difference in thickness between the fifth area 832 and the sixth area 833, the second rib 816 can include a second slope 816a connecting surfaces (not shown) having different heights. The first slope 815a and / or the second slope 816a can be formed to have a curved surface. The first rib 815 can prevent stress from being concentrated on a connection portion between the fourth area 831 and the sixth area 833 when the folding section ③ is bent. The first rib 815 can provide resistance for enabling the connection portion between the fourth area 831 and the sixth area 833 to withstand impact when the folding section ③ is bent. The second rib 816 can prevent stress from being concentrated on a connection portion between the fifth area 832 and the sixth area 833 when the folding section ③ is bent. The second rib 816 can provide resistance for enabling the connection portion between the fifth area 832 and the sixth area 833 to withstand impact when the folding section ③ is bent.

[0117] According to an embodiment, the third layer 830 can include a material for increasing the interfacial bonding force (or bonding strength) with the first layer 810. The third layer 830 can include a material for increasing the interfacial bonding force with the second layer 820. The third layer 830 can include a material for increasing the interfacial bonding force with the fourth layer 840. The third layer 830 can include a material for increasing the interfacial bonding force with the fifth layer 850. According to an embodiment, the third layer 830 can include a material that can be firmly bonded to all of the first layer 810, the second layer 820, the fourth layer 840, and the fifth layer 850.

[0118] According to an embodiment, the materials of the first layer 810, the second layer 820, the third layer 830, the fourth layer 840, or the fifth layer 850 can be selected to minimize a difference in refractive index between the media (e.g., layers) included in the front cover 200. When the difference in refractive index between the first layer 810 and the third layer 830, the difference in refractive index between the third layer 830 and the fourth layer 840, the difference in refractive index between the third layer 830 and the fifth layer 850, the difference in refractive index between the second layer 820 and the third layer 830, the difference in refractive index between the second layer 820 and the fourth layer 840, and the difference in refractive index between the second layer 820 and the fifth layer 850 are minimized, reflection on the interface and light loss due to the reflection can be reduced, and thus a clear image can be displayed on the screen. According to an embodiment, the difference in refractive index between the media can be about 0.01 or less, which is a level capable of ensuring a clear image.

[0119] According to an embodiment, the first layer 810 and the third layer 830 can be joined substantially without an air gap. The third layer 830 and the fourth layer 840 can be joined substantially without an air gap. The third layer 830 and the fifth layer 850 can be joined substantially without an air gap. The second layer 820 and the third layer 830 can be joined substantially without an air gap. The second layer 820 and the fourth layer 840 can be joined substantially without an air gap. The second layer 820 and the fifth layer 850 can be joined substantially without an air gap. Accordingly, a loss of light output from the flexible display 140 can be reduced, thereby ensuring image quality.

[0120] Figure 9 is a cross-sectional view of an example display assembly 900 in a folded state according to various embodiments.

[0121] Referring to Figure 9 In an embodiment, the display assembly 900 can include a flexible display 910, a cover 920, or an optically transparent joining member 930 (e.g., an OCA, an OCA, an OCR, or an SVR) between the flexible display 910 and the cover 920. For example, the display assembly 900 can include both folding portions 901 and 902. According to an embodiment, the cover 920 can be configured based on the cover 200 according to Figure 5 an embodiment of the cover 200 according to Figure 5 an embodiment of the cover 200 according to Figure 5 an embodiment of the cover 200 according to Figure 8 an embodiment of the cover 200 according to Figure 8 an embodiment of the cover 200 according to Figure 8 an embodiment of the cover 200 according to

[0122] Figure 10 is a cross-sectional view of an example display assembly 1000 in a folded state according to various embodiments.

[0123] Referring to Figure 10 In an embodiment, the display assembly 1000 can include a flexible display 1010, a cover 1020, or an optically transparent joining member 1030 (e.g., an OCA, an OCA, an OCR, or an SVR) between the flexible display 1010 and the cover 1020. For example, the display assembly 1000 can be configured in an outer folding structure in which a screen is folded outward. According to an embodiment, the cover 1020 can be configured based on the cover 200 according to Figure 5 an embodiment of the cover 200 according to Figure 8 an embodiment of the cover 200 according to

[0124] According to an embodiment of the disclosure, an electronic device (e.g., the electronic device 10 of Figure 1 an embodiment of the electronic device 10) can include a cover (e.g.,Figure 1 a front cover 200) and a flexible display coupled to the cover (e.g., a flexible display 140 of Figure 1 a flexible display 140 of Figure 5 a first layer 510 of Figure 8 a first layer 810 of Figure 5 a second layer 520 of Figure 8 a second layer 820 of Figure 5 a third layer 530 of Figure 8 a third layer 830 of Figure 5 a pattern 533 of Figure 8 a pattern 834 of Figure 5 a folding portion 143 of Figure 8 a folding portion 143 of Figure 5 a folding portion 143 of Figure 8 a folding portion 143 of

[0125] According to embodiments of the disclosure, a flexible display (e.g., a flexible display 140 of Figure 5 or Figure 8 a first portion 141 of Figure 5 or Figure 8 a second portion 142 of Figure 5 or Figure 8 a second portion 142 of Figure 5 or Figure 8 a folding portion 143 of Figure 5 or Figure 8 a folding portion ③ of Figure 5 or Figure 8 a first portion ① of Figure 5 or Figure 8 a second portion ② of Figure 5 or Figure 8 a second portion ② of

[0126] According to embodiments of the disclosure, a first layer (e.g., a first layer 510 of Figure 5 a folding portion ③ of Figure 8The folded section ③ has a higher value than the first section (e.g., Figure 5 The first section ①) and the second section (for example, Figure 8 The thickness of the second section ②) is small.

[0127] According to embodiments of this disclosure, the first layer (e.g., Figure 5 The first layer 510) may include recesses (e.g., Figure 8 The depression 514), which is formed in the folded section (e.g., Figure 5 In the folded section ③) facing the pattern (e.g., Figure 8 Pattern 533).

[0128] According to embodiments of this disclosure, the first layer (e.g., Figure 5 The first layer 510) can be in the folded section (e.g., Figure 8 The folded section ③ has a thickness of 10μm to 100μm.

[0129] According to embodiments of this disclosure, the first layer (e.g., Figure 5 The first layer 510) can be in the first segment (e.g., Figure 8 The first section ①) or the second section (for example, Figure 5 The second section (②) has a thickness of 100μm to 1000μm.

[0130] According to embodiments of this disclosure, the first layer (e.g., Figure 8 The first layer 510) may include a slope (e.g., Figure 5 The first inclined plane 515a or the second inclined plane 516b), the inclined plane connection includes the first section (e.g., Figure 8 The first section ①) or the second section (for example, Figure 5 The region of first thickness in the second section ②) and included in the folded section (e.g., Figure 8 The region with a second thickness less than the first thickness in the folded section ③).

[0131] According to embodiments of this disclosure, the first layer (e.g., Figure 5 The first layer (510) and the third layer (e.g., Figure 8 The refractive index difference between the third layer (530) and / or the second layer (e.g., Figure 5 The second layer (520) and the third layer (e.g., Figure 8 The refractive index difference between the third layer (530) can be 0.01 or less.

[0132] According to embodiments of this disclosure, the first segment (e.g., Figure 5 The first section ①) may also include a fourth layer (e.g., Figure 8The fourth layer (840), which is located in the first layer (e.g., Figure 5 The first layer 810) and the second layer (e.g., Figure 8 The second section (e.g., 820) includes glass between the second layer and the glass. Figure 5 The second section ②) may also include a fifth layer (e.g., Figure 8 The fifth layer (850), located between the first and second layers, includes glass. The third layer (e.g., Figure 5 The third layer (830) can extend between the first and fourth layers and between the first and fifth layers.

[0133] According to embodiments of this disclosure, the pattern (e.g., Figure 8 Pattern 834) can be located on the fourth layer (e.g., Figure 5 The fourth layer (840) and the fifth layer (e.g., Figure 8 Between the fifth floor (850).

[0134] According to embodiments of this disclosure, the first layer (e.g., Figure 5 The first layer 810) can be in the first segment (e.g., Figure 8 The first section ①), the second section (for example, Figure 5 The second section ②) and the folded section (e.g., Figure 8 The folded section ③) has the same thickness.

[0135] According to embodiments of this disclosure, the fourth layer (e.g., Figure 5 The fourth layer (840) and / or the fifth layer (e.g., Figure 8 The fifth layer (850) can have a higher density than the first layer (e.g., Figure 5 The first layer (810) has a large thickness.

[0136] According to embodiments of this disclosure, the first layer (e.g., Figure 8 The first layer (810) can have a thickness of 10 μm to 100 μm.

[0137] According to embodiments of this disclosure, the first layer (e.g., Figure 5 The first layer (810) and the third layer (e.g., Figure 8 The refractive index difference between the third layer (830) and the second layer (e.g., Figure 5 The refractive index difference between the second layer (820) and the third layer, and the refractive index difference between the second layer and the fourth layer (e.g., Figure 8 The refractive index difference between the fourth layer (840), the second layer and the fifth layer (e.g., Figure 5 The refractive index difference between the fifth layer (850), the refractive index difference between the third and fourth layers, and / or the refractive index difference between the third and fifth layers can be 0.01 or less.

[0138] According to embodiments of this disclosure, in the folded state of the electronic device, the first segment (e.g., Figure 8 The first section ①) and the second section (for example, Figure 5 The second section ②) can face each other and can be located in the first part (e.g., Figure 8 The first part 141) and the second part (e.g., Figure 5 Between the second part 142). According to another embodiment of the present disclosure, in the folded state of the electronic device, the first segment and the second segment may be located between the first part and the second part, which are positioned relative to each other (see the second part 142). Figure 8 ).

[0139] According to embodiments of this disclosure, based on the Shore D hardness scale, the third layer (e.g., Figure 5 The third layer 530 or Figure 8 The third layer (830) can have a hardness of 20 to 90.

[0140] According to embodiments of this disclosure, the second layer (e.g., Figure 5 The second layer 520 or Figure 8 The second layer (820) can have an elongation of about 4% to about 20%.

[0141] According to embodiments of this disclosure, the second layer (e.g., Figure 5 The second layer 520 or Figure 8 The second layer (820) or the third layer (e.g., Figure 5 The third layer 530 or Figure 8 The third layer (830) may include organic materials based on acryloyl, urethane or organosilicon.

[0142] According to embodiments of this disclosure, electronic devices (e.g., Figure 5 The electronic device 10 may also include an electromagnetic induction panel configured to be coupled to a flexible display (e.g., Figure 8 or Figure 5 The flexible display 140) or is disposed adjacent to the flexible display, and detects the pen input device (e.g., Figure 8 or Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 Figure 8 Figure 5 (Pen input device 175).

[0143] The embodiments of this disclosure described and illustrated in the specification and drawings are merely specific examples presented to readily illustrate the technical content of this disclosure and to aid in understanding it, and are not intended to limit the scope of this disclosure. Therefore, the scope of this disclosure should be interpreted as including all changes and modifications derived from the technical concept of this disclosure, in addition to the embodiments disclosed herein.

Claims

1.An electronic device comprising: a transparent cover including a first section, a second section, and a folding section between the first section and the second section; and a flexible display coupled to the transparent cover, wherein the transparent cover includes: a first layer including glass and included in the first section, the second section, and the folding section, a second layer between the first layer and the flexible display and included in the first section, the second section, and the folding section, a third layer between the first layer and the second layer and included in the first section, the second section, and the folding section, a fourth layer between a portion of the third layer in the first section and a portion of the second layer in the first section and including glass, and a fifth layer between a portion of the third layer in the second section and a portion of the second layer in the second section and including glass, wherein the first layer has a same thickness in the first section, the second section, and the folding section, wherein the third layer includes a pattern at the folding section, the pattern including a plurality of grooves formed on a bonding surface with the second layer, the third layer having a hardness greater than a hardness of the second layer, and wherein the pattern of the third layer is between the fourth layer and the fifth layer. 2.The electronic device of claim 1, wherein the fourth layer and / or the fifth layer has a thickness greater than the thickness of the first layer. 3.The electronic device of claim 1, wherein the first layer has a thickness of 10 μm to 100 μm. 4.The electronic device of claim 1, wherein a difference in refractive index between the first layer and the third layer, a difference in refractive index between the second layer and the third layer, a difference in refractive index between the second layer and the fourth layer, a difference in refractive index between the second layer and the fifth layer, a difference in refractive index between the third layer and the fourth layer, and / or a difference in refractive index between the third layer and the fifth layer is 0.01 or less. 5.The electronic device of claim 1, wherein the first section and the second section face each other in a folded state of the electronic device. 6.The electronic device of claim 1, wherein the first section and the second section are positioned opposite each other in a folded state of the electronic device. 7.The electronic device of claim 1, wherein the third layer has a hardness of 20 to 90 based on a Shore D hardness scale. 8.The electronic device of claim 1, wherein the second layer has an elongation of about 4% to about 20%. 9.The electronic device of claim 1, wherein the second layer or the third layer includes an acryl-based, urethane-based, or silicone-based organic material. 10.The electronic device of claim 1, further comprising an electromagnetic induction panel configured to be coupled to the flexible display or disposed adjacent to the flexible display and detect a pen input device. ​

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