Patent Publication Number: US-2023156945-A1

Title: Electronic device including flexible display

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation of U.S. patent application Ser. No. 17/158,966 filed on Jan. 26, 2021, which is based on and claims priority under 35 U.S.C. 119 to Korean Patent Application No. 10-2020-0054347 filed on May 7, 2020, in the Korean Intellectual Property Office, the disclosures of which are herein incorporated by reference in their entirety. 
    
    
     BACKGROUND 
     1. Field 
     Various embodiments of the disclosure relate to an electronic device, e.g., an electronic device with a flexible display. 
     2. Description of Related Art 
     As the demand for mobile communication increases, or as the degree of integration of electronic devices increases, the portability of electronic devices such as mobile communication terminals may be increased, and better convenience may be provided in use of multimedia functions. For example, as touchscreen-integrated displays replace traditional mechanical (button-type) keypads, electronic devices may come more compact while functioning as an input device. For example, as the mechanical keypad may be omitted from the electronic device, portability of the electronic device may be improved. As the display area may be expanded to the area which used to be occupied by the mechanical keypad, the electronic device may provide a larger screen while remaining in the same size and weight as when it has the mechanical keypad. 
     Use of an electronic device with a larger screen may give more convenience in, e.g., web browsing or multimedia playing. A larger display may be adopted to output a larger screen. However, this way may be limited by the portability of the electronic device. According to an embodiment, a display using organic light emitting diodes may secure the portability of the electronic device while providing a larger screen. For example, a display using, or equipped with, organic light emitting diodes may implement a stable operation even if it is made quite thin, so that the display may be applied to an electronic device in a foldable, bendable or rollable form. 
     Electronic devices which may be folded or rolled according to the relative motion of mechanical structures may suffer from influx of foreign bodies into the internal space through the gap between the mechanical structures. For example, the foreign bodies may contaminate the internal space of the foldable, or rollable, electronic device or damage various electronic or mechanical components. 
     A foldable or rollable electronic device may include a flexible display. The flexible display may be attached to a mechanical structure and may be protected by a transparent member, such as a glass plate, a glass cover, a glass film, or a polyimide film, if necessary. In a structure in which the flexible display is attached to a mechanical structure in a foldable or rollable electronic device, the flexible display may be peeled off from the mechanical structure. For example, as the adhesive (or adhesive member) in the electronic device may denature or deteriorate according to the actual use environment or use time, the flexible display may start peeling off from a portion, e.g., edge or corner, thereof. 
     SUMMARY 
     According to various embodiments, there may be provided an electronic device including a flexible display, which may block entry of foreign bodies into the internal space. 
     According to various embodiments, there may be provided an electronic device including a flexible display, which may block entry of foreign bodies while allowing the flexible display to be folded or rolled more smoothly. 
     According to various embodiments, there may be provided an electronic device including a flexible display, which may prevent the flexible display from separating off the mechanical structure and secure durability. 
     In accordance with an embodiment, an electronic device comprises a first structure including a first plate providing a first surface and a second surface facing away from the first surface, a second structure coupled to surround at least a portion of the first structure and guiding a sliding of the first structure in a direction parallel with the first surface or the second surface of the first structure, a roller rotatably mounted on an edge of the second structure, a flexible display including a first area mounted on the first surface of the first structure and a second area extending from the first area, the second area of the flexible display guided at least partially by the roller to be inserted or received from a side of the second structure to an inside of the second structure or exposed to an outside of the second structure as the first structure is slid, and at least one support sheet mounted on the roller and selectively wound around the roller as the roller rotates, wherein the support sheet is wound around the roller when the second area is received inside the second structure, and is unfolded inside the second area when the second area is exposed to the outside of the second structure. 
     In accordance with an embodiment, an electronic device may comprise a housing including a rear case and a side wall extending from the rear case, a roller rotatably mounted in the housing while being positioned adjacent to a portion of the side wall, at least one support sheet mounted on the roller and selectively wound around the roller as the roller rotates, and a flexible display including a first area exposed to an outside of the housing and a second area extending from the first area, the second area of the flexible display guided by the roller to be at least partially inserted or received inside the housing or exposed to the outside of the housing, wherein the support sheet is gradually wound around the roller as the second area is gradually received inside the housing, and wherein when the second area is exposed to the outside of the housing, the support sheet is positioned between the rear case and the second area. 
     According to various embodiments, the electronic device may include a support member (e.g., support sheet) wound around the roller, thereby allowing for adjustment of the gap (e.g., the gap of the entrance) of the portion where the flexible display enters the second structure or the housing. For example, the entrance gap may be reduced, with the flexible display received in the second structure or housing, so that entry of foreign bodies may be blocked off. According to an embodiment, a sufficient gap may be secured between the flexible display and other structures while inserted to or extracted from the second structure or housing, thus preventing the display from interfering with or rubbing against other structures. By preventing the flexible display from interfering with or rubbing against other structures, the insertion or extraction operation may be smoothed, and damage to the flexible display may be prevented. According to an embodiment, at least some of the edges of the flexible display may be supported on the inside of the mechanical structure, thereby preventing separation from the mechanical structure due to degeneration of the adhesive component (or adhesive member). 
     Before undertaking the DETAILED DESCRIPTION below, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document: the terms “include” and “comprise,” as well as derivatives thereof, mean inclusion without limitation; the term “or,” is inclusive, meaning and/or; the phrases “associated with” and “associated therewith,” as well as derivatives thereof, may mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, or the like; and the term “controller” means any device, system or part thereof that controls at least one operation, such a device may be implemented in hardware, firmware or software, or some combination of at least two of the same. It should be noted that the functionality associated with any particular controller may be centralized or distributed, whether locally or remotely. 
     Moreover, various functions described below can be implemented or supported by one or more computer programs, each of which is formed from computer readable program code and embodied in a computer readable medium. The terms “application” and “program” refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, related data, or a portion thereof adapted for implementation in a suitable computer readable program code. The phrase “computer readable program code” includes any type of computer code, including source code, object code, and executable code. The phrase “computer readable medium” includes any type of medium capable of being accessed by a computer, such as read only memory (ROM), random access memory (RAM), a hard disk drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory. A “non-transitory” computer readable medium excludes wired, wireless, optical, or other communication links that transport transitory electrical or other signals. A non-transitory computer readable medium includes media where data can be permanently stored and media where data can be stored and later overwritten, such as a rewritable optical disc or an erasable memory device. 
     Definitions for certain words and phrases are provided throughout this patent document, those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts: 
         FIG.  1    is a view illustrating an electronic device according to an embodiment, wherein a portion of a flexible display is received in a second structure; 
         FIG.  2    is a view illustrating an electronic device according to an embodiment, wherein most of a flexible display is exposed to the outside of a second structure; 
         FIG.  3    is an exploded perspective view illustrating an electronic device according to an embodiment; 
         FIG.  4    is an exploded perspective view illustrating a flexible display mounting structure of an electronic device according to an embodiment; 
         FIG.  5    is a bottom view illustrating a flexible display of an electronic device according to an embodiment; 
         FIG.  6    is a side, cross-sectional view illustrating an example in which a flexible display of an electronic device is mounted, according to an embodiment; 
         FIG.  7    is a perspective view illustrating an example in which a flexible display of an electronic device is mounted, according to an embodiment; 
         FIG.  8    is a bottom view illustrating an example in which a flexible display of an electronic device is mounted, according to an embodiment; 
         FIG.  9    illustrates a cross-sectional view of the display and/or first structure, taken along line C 1  of  FIG.  7   ; 
         FIG.  10    is a cross-sectional view of the display and/or first structure, taken along line C 2  of  FIG.  7   ; 
         FIGS.  11 ,  12 , and  13    are views illustrating a structure in which a support sheet is mounted on a roller of an electronic device according to an embodiment; 
         FIG.  14    is a perspective view illustrating an electronic device according to an embodiment, wherein a portion of a flexible display is received in a second structure; 
         FIG.  15    is a perspective view illustrating a state in which the flexible display is removed from the electronic device of  FIG.  14   ; 
         FIG.  16    is a cross-sectional view illustrating an electronic device according to an embodiment, wherein a portion of a flexible display is received in a second structure; 
         FIG.  17    is an enlarged, cross-sectional view illustrating a portion of  FIG.  16   ; 
         FIG.  18    is a perspective view illustrating an electronic device according to an embodiment, wherein most of a flexible display is exposed to the outside of a second structure; 
         FIG.  19    is a perspective view illustrating a state in which the flexible display is removed from the electronic device of  FIG.  18   ; 
         FIG.  20    is a cross-sectional view illustrating an electronic device according to an embodiment, wherein most of a flexible display is exposed to the outside of a second structure; 
         FIG.  21    is an enlarged, cross-sectional view illustrating a portion of  FIG.  20   ; and 
         FIG.  22    is a view illustrating a structure in which a support sheet of an electronic device is wound around a roller according to an embodiment. 
     
    
    
     Throughout the drawings, like reference numerals will be understood to refer to like parts, components, and structures. 
     DETAILED DESCRIPTION 
       FIGS.  1  through  22   , discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged system or device. 
     It should be appreciated that various embodiments of the disclosure and the terms used therein are not intended to limit the technological features set forth herein to particular embodiments and include various changes, equivalents, or replacements for a corresponding embodiment. With regard to the description of the drawings, similar reference numerals may be used to refer to similar or related elements. It is to be understood that a singular form of a noun corresponding to an item may include one or more of the things, unless the relevant context clearly indicates otherwise. As used herein, each of such phrases 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,” may include any one of, or all possible combinations of the items enumerated together in a corresponding one of the phrases. As used herein, such terms as “1st” and “2nd,” or “first” and “second” may be used to simply distinguish a corresponding component from another, and does not limit the components in other aspect (e.g., importance or order). It is to be understood that if an element (e.g., a first element) is referred to, with or without the term “operatively” or “communicatively”, as “coupled with,” “coupled to,” “connected with,” or “connected to” another element (e.g., a second element), it means that the element may be coupled with the other element directly (e.g., wiredly), wirelessly, or via a third element. 
     As used herein, the term “module” may include a unit implemented in hardware, software, or firmware, and may interchangeably be used with other terms, for example, “logic,” “logic block,” “part,” or “circuitry”. A module may be a single integral component, or a reduced (minimum) unit or part thereof, adapted to perform one or more functions. For example, according to an embodiment, the module may be implemented in a form of an application-specific integrated circuit (ASIC). 
     Various embodiments as set forth herein may be implemented as software (e.g., a program) including one or more instructions that are stored in a storage medium (e.g., internal memory or external memory) that is readable by a machine (e.g., the electronic device # 01 ). For example, a processor of the machine (e.g., the electronic device  100 ) may invoke at least one of the one or more instructions stored in the storage medium, and execute it, with or without using one or more other components under the control of the processor. This allows the machine to be operated to perform at least one function according to the at least one instruction invoked. The one or more instructions may include a code generated by a complier or a code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Wherein, the term “non-transitory” simply means that the storage medium is a tangible device, and does not include a signal (e.g., an electromagnetic wave), but this term does not differentiate between where data is semi-permanently stored in the storage medium and where the data is temporarily stored in the storage medium. 
     According to an embodiment, a method may be included and provided in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or be distributed (e.g., downloaded or uploaded) online via an application store (e.g., PLAYSTORE), or between two user devices (e.g., smart phones) directly. If distributed online, at least part of the computer program product may be temporarily generated or at least temporarily stored in the machine-readable storage medium, such as memory of the manufacturer&#39;s server, a server of the application store, or a relay server. 
     According to an embodiment, each component (e.g., a module or a program) of the above-described components may include a single entity or multiple entities. According to an embodiment, one or more of the above-described components may be omitted, or one or more other components may be added. Alternatively or additionally, a plurality of components (e.g., modules or programs) may be integrated into a single component. According to an embodiment, the integrated component may still perform one or more functions of each of the plurality of components in the same or similar manner as they are performed by a corresponding one of the plurality of components before the integration. According to an embodiment, operations performed by the module, the program, or another component may be carried out sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order or omitted, or one or more other operations may be added. 
       FIG.  1    is a view illustrating an electronic device  100  according to an embodiment, wherein a portion (e.g., the second area A 2 ) of a flexible display  103  is received in a second structure  102 .  FIG.  2    is a view illustrating an electronic device  100  according to an embodiment, wherein most of a flexible display  103  is exposed to the outside of a second structure  102 . 
     The state shown in  FIG.  1    may be defined as a first structure  101  being closed with respect to a second structure  102 , and the state shown in  FIG.  2    may be defined as the first structure  101  being open with respect to the second structure  102 . According to an embodiment, the “closed state” or “opened state” may be defined as a closed or open state of the electronic device. 
     Referring to  FIGS.  1  and  2   , an electronic device  100  may include a first structure  101  and a second structure  102  disposed to be movable in the first structure  101 . According to an embodiment, the electronic device  100  may be interpreted as having a structure in which the first structure  101  is slidably disposed on the second structure  102 . According to an embodiment, the first structure  101  may be disposed to perform reciprocating motion by a predetermined distance in a predetermined direction with respect to the second structure  102 , for example, a direction indicated by an arrow {circle around ( 1 )}. 
     According to an embodiment, the first structure  101  may be referred to as, for example, a first housing, a slide unit, or a slide housing, and may be disposed to reciprocate on the second structure  102 . According to an embodiment, the second structure  102  may be referred to as, for example, a second housing, a main part, or a main housing, and may receive various electric or electronic components such as a main circuit board or a battery. A portion (e.g., the first area A 1 ) of the display  103  may be seated on the first structure  101 . According to an embodiment, another portion (e.g., the second area A 2 ) of the display  103  may be received (e.g., slide-in) into the inside of the second structure  102  or exposed (e.g., slide-out) to the outside of the second structure  102  as the first structure  101  moves (e.g., slides) relative to the second structure  102 . 
     According to an embodiment, the first structure  101  may include a first plate  111   a  (e.g., a slide plate), and the first structure  101  may include a first surface F 1  (refer to  FIG.  3   ) formed to at least a portion of the first plate  111   a  and a second surface F 2  facing away from the first surface F 1 . According to an embodiment, the second structure  102  may include a second plate  121   a  (refer to  FIG.  3   ) (e.g., a rear case), a first side wall  123   a  extending from the second plate  121   a,  a second side wall  123   b  extending from the first side wall and the second plate  121   a,  a third side wall  123   c  extending from the first side wall  123   a  and the second plate  121   a  and positioned parallel to the second side wall  123   b,  and/or a rear plate  121   b  (e.g., a rear window). According to an embodiment, the second side wall  123   b  and the third side wall  123   c  may be formed to be perpendicular to the first side wall  123   a.  According to an embodiment, the second plate  121   a,  the first side wall  123   a,  the second side wall  123   b,  and the third side wall  123   c  may be formed to have an opening (e.g., in the front face) to receive (or surround) at least a portion of the first structure  101 . For example, the first structure  101  may be coupled to the second structure  102  in a state in which it is at least partially surrounded, and the first structure  101  may be slide in a direction parallel to the first surface F 1  or the second surface F 2 , for example, direction {circle around ( 1 )} indicated with the arrow. 
     According to an embodiment, the second side wall  123   b  or the third side wall  123   c  may be omitted. According to an embodiment, the second plate  121   a,  the first side wall  123   a,  the second side wall  123   b,  and/or the third side wall  123   c  may be formed as separate structures and may be combined or assembled. The rear plate  121   b  may be coupled to surround at least a portion of the second plate  121   a.  According to an embodiment, the rear plate  121   b  may be formed substantially integrally with the second plate  121   a.  According to an embodiment, the second plate  121   a  or the rear plate  121   b  may cover at least a portion of the flexible display  103 . For example, the flexible display  103  may be at least partially received inside the second structure  102 , and the second plate  121   a  or the rear plate  121   b  may cover the portion of the flexible display received inside the second structure  102 . 
     According to an embodiment, the first structure  101  may be moved in an open state or closed state with respect to the second structure  102  in a first direction (e.g., direction {circle around ( 1 )}) parallel with the second plate  121   a  (e.g., the rear case) and the second side wall  123   b  to be positioned a first distance away from the first side wall  123   a  in the closed state and be positioned a second distance away from the first side wall  123   a  in the open state, wherein the second distance is larger than the first distance. According to an embodiment, when in the closed state, the first structure  101  may be positioned to surround a portion of the first side wall  123   a.    
     According to an embodiment, the electronic device  100  may include a display  103 , a key input device  141 , a connector hole  143 , audio holes  145   a,    145   b,    147   a,  and  147   b,  or a camera module  149 . Although not shown, the electronic device  100  may further include an indicator (e.g., a light emitting diode (LED) device) or various sensor modules. 
     According to an embodiment, the display  103  may include a first area A 1  and a second area A 2 . According to an embodiment, the first area A 1  may extend substantially across at least a portion of the first surface F 1  and may be disposed on the first surface F 1 . The second area A 2  may extend from the first area A 1  and be inserted or received into the inside of the second structure  102  (e.g., housing) or be exposed to the outside of the structure  102  as the first structure  101  slides. As will be described below, the second area A 2  may be moved while being substantially guided by a roller  151  (refer to  FIG.  3   ) mounted on the second structure  102  and may thus be received into the inside of or exposed to the outside of the second structure  102 . For example, while the first structure  101  slides, a portion of the second area A 2  may be deformed into a curved shape in a position corresponding to the roller  151 . 
     According to an embodiment, when viewed from the top of the first plate  111   a  (e.g., slide plate), when the first structure  101  moves from the closed state to the open state, the second area A 2  may be gradually exposed to the outside of the second structure  102  to be substantially coplanar with the first area A 1 . The display  103  may be disposed to be coupled with, or adjacent, a touch detecting circuit, a pressure sensor capable of measuring the strength (pressure) of touches, and/or a digitizer for detecting a magnetic field-type stylus pen. According to an embodiment, the second area A 2  may be at least partially received inside the second structure  102 , and a portion of the second area A 2  may be exposed to the outside even in the state shown in  FIG.  1    (e.g., the closed state). According to an embodiment, irrespective of the closed state or the open state, the exposed portion of the second area A 2  may be positioned on the roller  151  and, in a position corresponding to the roller  151 , a portion of the second area A 2  may maintain the curved shape. 
     The key input device  141  may be disposed on the second side wall  123   b  or the third side wall  123   c  of the second structure  102 . Depending on the appearance and the state of use, the electronic device  100  may be designed to omit the illustrated key input device  141  or to include additional key input device(s). According to an embodiment, the electronic device  100  may include a key input device (not shown), e.g., a home key button or a touchpad disposed around the home key button. According to an embodiment, at least a portion of the key input device  141  may be positioned on an area of the first structure  101 . 
     According to an embodiment, the connector hole  143  may be omitted or may receive a connector (e.g., a universal serial bus (USB) connector) for transmitting and receiving power and/or data with an external electronic device. Although not shown, the electronic device  100  may include a plurality of connector holes  143 , and some of the plurality of connector holes  143  may function as connector holes for transmitting/receiving audio signals with an external electronic device. In the illustrated embodiment, the connector hole  143  is disposed on the third side wall  123   c,  but the disclosure is not limited thereto. For example, the connector hole  143  or a connector hole not shown may be disposed on the first side wall  123   a  or the second side wall  123   b.    
     According to an embodiment, the audio holes  145   a,    145   b,    147   a,  and  147   b  may include speaker holes  145   a  and  145   b  or microphone holes  147   a  and  147   b.  One of the speaker holes  145   a  and  145   b  may be provided as a receiver hole for voice calls, and the other may be provided as an external speaker hole. The microphone holes  147   a  and  147   b  may have a microphone inside to obtain external sounds. According to an embodiment, there may be a plurality of microphones to be able to detect the direction of a sound. According to an embodiment, the speaker holes  145   a  and  145   b  and the microphone holes  147   a  and  147   b  may be implemented as one hole, or a speaker may be included without the speaker holes  145   a  and  145   b  (e.g., a piezo speaker). According to, the speaker hole indicated by the reference number “ 145   b ” may be disposed in the first structure  101  and used as a receiver hole for voice calls, and the speaker hole indicated by the reference number “ 145   a ” (e.g., an external speaker hole) or the microphone holes  147   a  and  147   b  may be disposed in the second structure  102  (e.g., one of the side walls  123   a,    123   b,  and  123   c ). 
     The camera module  149  may be provided on the second structure  102  and may capture a subject in a direction opposite to the first area A 1  of the display  103 . The electronic device  100  may include a plurality of camera modules  149 . For example, the electronic device  100  may include a wide-angle camera, a telephoto camera, or a close-up camera, and according to an embodiment, by including an infrared projector and/or an infrared receiver, the electronic device  100  may measure the distance to the subject. The camera module  149  may include one or more lenses, an image sensor, and/or an image signal processor. Although not shown, the electronic device  100  may further include a camera module (e.g., a front camera) that captures the subject in a direction opposite to the first area A 1  of the display  103 . For example, the front camera may be disposed around the first area A 1  or in an area overlapping the display  103  and, when disposed in the area overlapping the display  103 , the front camera may capture the subject via the display  103 . 
     According to an embodiment, an indicator (not shown) of the electronic device  100  may be disposed on the first structure  101  or the second structure  102 , and the indicator may include a light emitting diode to provide state information about the electronic device  100  as a visual signal. The sensor module (not shown) of the electronic device  100  may produce an electrical signal or data value corresponding to the internal operation state or external environment state of the electronic device. The sensor module may include, for example, a proximity sensor, a fingerprint sensor, or a biometric sensor (e.g., an iris/face recognition sensor or a heartrate monitor (HRM) sensor). According to an embodiment, the sensor module may further include, e.g., at least one of a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an infrared (IR) sensor, a temperature sensor, a humidity sensor, or an illuminance sensor. 
       FIG.  3    is an exploded perspective view illustrating an electronic device (e.g., the electronic device  100  of  FIG.  1  or  2   ) according to an embodiment. 
     Referring to  FIG.  3   , the electronic device  100  may include a first structure  101 , a second structure  102  (e.g., a housing), a display  103  (e.g., a flexible display), a guide member (e.g., the roller  151 ), a support sheet  153 , and/or a multi-joint hinge structure  113 . A portion (e.g., the second area A 2 ) of the display  103  may be received in the second structure  102  while being guided by the roller  151 . 
     According to an embodiment, the first structure  101  may include a first plate  111   a  (e.g., a slide plate), a first bracket  111   b  and/or a second bracket  111   c  mounted on the first plate  111   a.  The first structure  101 , for example, the first plate  111   a,  the first bracket  111   b,  and/or the second bracket  111   c  may be formed of a metallic material and/or a non-metallic (e.g., polymer) material. The first plate  111   a  may be mounted on the second structure  102  (e.g., the housing) and may be linearly reciprocated in one direction (e.g., in the direction {circle around ( 1 )} indicated with the arrow in  FIG.  1   ) while being guided by the second structure  102 . According to an embodiment, the first bracket  111   b  may be coupled to the first plate  111   a  to, together with the first plate  111   a,  form the first surface F 1  of the first structure  101 . The first area A 1  of the display  103  may be substantially mounted on the first surface F 1  and remain in a flat plate shape. The second bracket  111   c  may be coupled to the first plate  111   a  to, together with the first plate  111   a,  form the second surface F 2  of the first structure  101 . According to an embodiment, the first bracket  111   b  and/or the second bracket  111   c  may be integrally formed with the first plate  111   a.  This may be appropriately designed in consideration of the assembly structure or manufacturing process of the product to be manufactured. The first structure  101  or the first plate  111   a  may be coupled with the second structure  102  and slide with respect to the second structure  102 . 
     According to an embodiment, the multi-joint hinge structure  113  may include a plurality of bars or rods  114  (refer to  FIG.  16    or  FIG.  17   ) and may be connected to one end of the first structure  101 . For example, as the first structure  101  slides, the multi joint hinge structure  113  may move with respect to the second structure  102  and, in a closed state (e.g., the state shown in  FIG.  1   ), the multi-joint hinge structure  113  may be substantially received inside the second structure  102 . According to an embodiment, even in the closed state, a portion of the multi-joint hinge structure  113  may not be received inside the second structure  102 . For example, even in the closed state, a portion of the multi joint hinge structure  113  may be positioned to correspond to the roller  151  outside the second structure  102 . The plurality of rods  114  may extend in a straight line and be disposed parallel to the rotation axis R of the roller  151 , and the plurality of rods  114  may be arranged along a direction perpendicular to the rotation axis R, e.g., the direction along which the first structure  101  slides. 
     According to an embodiment, each rod  114  may pivot around another adjacent rod  114  while remaining parallel with the other adjacent rod  114 . Accordingly, as the first structure  101  slides, the plurality of rods  114  may be arranged to form a curved shape or a planar shape. For example, as the first structure  101  slides, a portion of the multi-joint hinge structure  113 , which faces the roller  151 , may form a curved surface, and another portion of the multi-joint hinge structure  113 , which does not face the roller  151 , may form a flat surface. According to an embodiment, the second area A 2  of the display  103  may be mounted or supported on the multi-joint hinge structure  113  and, in the open state (e.g., the state shown in  FIG.  2   ), the second area A 2 , along with the first area A 1 , may be exposed to the outside of the second structure  102 . In the state in which the second area A 2  is exposed to the outside of the second structure  102 , the multi-joint hinge structure  113  may substantially form a flat surface, thereby supporting or maintaining the second area A 2  in the flat state. 
     According to an embodiment, the second structure  102  (e.g., housing) may include a second plate  121   a  (e.g., a rear case), a printed circuit board (not shown), a rear plate  121   b,  a third plate  121   c  (e.g., the front case), and a support member  121   d.  The second plate  121   a,  e.g., the rear case, may be disposed to face in a direction opposite to the first surface F 1  of the first plate  111   a,  and the second plate  121   a  may substantially form the external shape of the second structure  102  or the electronic device  100 . According to an embodiment, the second structure  102  may include a first side wall  123   a  extending from the second plate  121   a,  a second side wall  123   b  extending from the second plate  121   a  and formed to be substantially perpendicular to the first side wall  123   a,  and a third side wall  123   c  extending from the second plate  121   a,  substantially perpendicular to the first side wall  123   a,  and parallel to the second side wall  123   b.  In the illustrated embodiment, the second side wall  123   b  and the third side wall  123   c  are manufactured as separate components from the second plate  121   a  and are mounted or assembled on the second plate  121   a.  However, the second side wall  123   b  and the third side wall  123   c  may alternatively be integrally formed with the second plate  121   a.  The second structure  102  may receive an antenna for proximity wireless communication, an antenna for wireless charging, or an antenna for magnetic secure transmission (MST) in a space that does not overlap the multi-joint hinge structure  113 . 
     According to an embodiment, the rear plate  121   b  may be coupled to the outer surface of the second plate  121   a  and, according to an embodiment, the rear plate  121   b  may be manufactured integrally with the second plate  121   a.  According to an embodiment, the second plate  121   a  may be formed of a metal or polymer, and the rear plate  121   b  may be formed of a material such as metal, glass, synthetic resin, or ceramic to decorate the exterior of the electronic device  100 . According to an embodiment, the second plate  121   a  and/or the rear plate  121   b  may be formed of a material that transmits light at least partially (e.g., an auxiliary display area). For example, while a portion (e.g., the second area A 2 ) of the display  103  is received in the second structure  102 , the electronic device  100  may output visual information using a partial area of the display  103  received inside the second structure  102 . The auxiliary display area may provide the visual information output from the area received inside the second structure  102  to the outside of the second structure  102 . 
     According to an embodiment, the third plate  121   c  may be formed of a metal or polymer, and the third plate  121   c  may be coupled with the second plate  121   a  (e.g., rear case), the first side wall  123   a,  the second side wall  123   b,  and/or the third side wall  123   c  to form an internal space of the second structure  102 . According to an embodiment, the third plate  121   c  may be referred to as a “front case”, and the first structure  101 , e.g., the first plate  111   a,  may be slid while substantially facing the third plate  121   c.  According to an embodiment, the first side wall  123   a  may be formed of a combination of a first side wall portion  123   a - 1  extending from the second plate  121   a  and a second side wall portion  123   a - 2  formed at an edge of the third plate  121   c.  According to an embodiment, the first side wall portion  123   a - 1  may be coupled to surround an edge of the third plate  121   c,  e.g., the second side wall portion  123   a - 2 . In this case, the first side wall portion  123   a - 1  itself may form the first side wall  123   a.    
     According to an embodiment, the support member  121   d  may be disposed in a space between the second plate  121   a  and the third plate  121   c,  and may have a flat plate shape formed of a metal or polymer. The support member  121   d  may provide an electromagnetic shielding structure in the internal space of the second structure  102  or may increase mechanical rigidity of the second structure  102 . According to an embodiment, when received into the inside of the second structure  102 , a partial area (e.g., the second area A 2 ) of the multi joint hinge structure  113  and/or the display  103  may be positioned in a space between the second plate  121   a  and the support member  121   d.    
     According to an embodiment, a printed circuit board (not shown) may be disposed in a space between the third plate  121   c  and the support member  121   d.  For example, the printed circuit board may be received in a space separated by the support member  121   d  from the space in which a partial area of the multi joint hinge structure  113  and/or the display  103  is received inside the second structure  102 . A processor, memory, and/or interface may be mounted on the printed circuit board. The processor may include one or more of, e.g., a central processing unit, an application processor, a graphic processing device, an image signal processing, a sensor hub processor, or a communication processor. 
     The memory may include, e.g., a volatile or non-volatile memory. 
     The interface may include, e.g., a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, and/or an audio interface. The interface may electrically or physically connect, e.g., the electronic device  100  with an external electronic device and may include a USB connector, an SD card/multimedia card (MMC) connector, or an audio connector. 
     According to an embodiment, the display  103  may be an organic light emitting diode-based flexible display, and the display  103  may normally remain in the flat shape and may be at least partially deformed into a curved shape. According to an embodiment, the first area A 1  of the display  103  may be mounted or attached to the first surface F 1  of the first structure  101  and maintained in a substantially flat shape. The second area A 2  may extend from the first area A 1  and may be supported or attached to the multi joint hinge structure  113 . For example, the second area A 2  may extend along the sliding direction of the first structure  101  and, along with the multi-joint hinge structure, may be received in the second structure  102 . As the multi joint hinge structure  113  is deformed, the second area A 2  may be at least partially deformed into a curved shape. 
     According to an embodiment, as the first structure  101  slides on the second structure  102 , the area of the display  103  exposed to the outside may vary. The electronic device  100  (e.g., processor) may change the area of the display  103  that is activated based on the area of the display  103  that is exposed to the outside. For example, in the open state or in an intermediate position between the closed state and the open state, the electronic device  100  may activate a partial area exposed to the outside of the second structure  102  of the entire area of the display  103 . In the closed state, the electronic device  100  may activate the first area A 1  of the display  103  and deactivate the second area A 2 . In the closed state, when there is no user input for a certain period of time (e.g., 30 seconds or 2 minutes), the electronic device  100  may deactivate the entire area of the display  103 . According to an embodiment, in the state in which the entire area of the display  103  is deactivated, the electronic device  100  may activate a partial area of the display  103  as necessary (e.g., a notification according to user settings, missing call/received message notification) and provide visual information through the auxiliary display area (e.g., a portion of the second plate  121   a  and/or the rear plate  121   b  formed of a material that transmits light). 
     According to an embodiment, in the open state (e.g., the state shown in  FIG.  2   ), the entire area (e.g., the first area A 1  and the second area A 2 ) of the display  103  may be substantially exposed to the outside, and the first area A 1  and the second area A 2  may be arranged to form a plane. According to an embodiment, even in the open state, a portion (e.g., one end) of the second area A 2  may be positioned corresponding to the roller  151 , and the portion of the second area A 2 , which corresponds to the roller  151  may remain in the curved shape. For example, according to an embodiment, despite the phrase “the second area A 2  is disposed to form a plane in the open state,” a portion of the second area A 2  may remain in the curved shape. Likewise, although it is stated that “in the closed state, the multi-joint hinge structure  113  and/or the second area A 2  are received inside the second structure  102 ,” a portion of the second area A 2  of the multi-joint hinge structure  113  may be positioned outside the second structure  102 . 
     According to an embodiment, the guide member, e.g., the roller  151 , may be rotatably mounted on the second structure  102  in a position adjacent to an edge of the second structure  102  (e.g., the second plate  121   a ). For example, the roller  151  may be disposed adjacent to an edge (e.g., the portion indicated with reference denotation ‘IE’) of the second plate  121   a  parallel to the first side wall  123   a.  Although no reference denotation is assigned in the drawings, another side wall may extend from the edge of the second plate  121   a,  and the side wall adjacent to the roller  151  may be substantially parallel to the first side wall  123   a.  As mentioned above, the side wall of the second structure  102  adjacent to the roller  151  may be formed of a material that transmits light, and a portion of the second area A 2  may provide visual information via the portion of the second structure  102  while being received in the second structure  102 . 
     According to an embodiment, an end of the roller  151  may be rotatably coupled to the second side wall  123   b,  and the other end thereof may be rotatably coupled to the third side wall  123   c.  For example, the roller  151  may be mounted on the second structure  102 , rotating about the rotation axis R perpendicular to the sliding direction (e.g., direction {circle around ( 1 )} indicated with the arrow in  FIG.  1  or  2   ) of the first structure  101 . The rotation axis R may be disposed substantially parallel to the first side wall  123   a,  and may be positioned away from the first side wall  123   a,  for example, at one edge of the second plate  121   a.  According to an embodiment, the gap formed between the outer circumferential surface of the roller  151  and the inner surface of the edge of the second plate  121   a  may form an entrance through which the multi-joint hinge structure  113  or display  103  enters the second structure  102 . 
     According to an embodiment, when the display  103  is deformed into a curved shape, the roller  151  maintains a radius of curvature of the display  103  to a certain degree, thereby suppressing excessive deformation of the display  103 . The term “excessive deformation” may mean that the display  103  is deformed to have a radius of curvature that is too small to damage pixels or signal lines included in the display  103 . For example, the display  103  may be moved or deformed while being guided by the roller  151  and may be protected from damage due to excessive deformation. According to an embodiment, the roller  151  may rotate while the multi-joint hinge structure  113  or the display  103  is inserted into or extracted from the second structure  102 . For example, the friction between the multi joint hinge structure  113  (or display  103 ) and the second structure  102  may be suppressed, allowing the multi joint hinge structure  113  (or display  103 ) to smooth the insertion/extraction of the second structure  102 . 
     According to an embodiment, the support sheet  153  may be formed of a material having flexibility and a certain degree of elasticity, for example, a material including an elastic body such as silicone or rubber. As the roller  151  rotates, with the support sheet  153  mounted or attached to the roller  151 , the support sheet  153  may be selectively wound around the roller  151 . In the illustrated embodiment, a plurality of (e.g., four) support sheets  153  may be arranged along the direction of the rotation axis R of the roller  151 . For example, the plurality of support sheets  153  may be mounted on the roller  151  with them a predetermined distance spaced apart from other adjacent support sheets  153 , and the support sheets  153  may extend along a direction perpendicular to the rotation axis R. Alternatively, one support sheet may be mounted or attached to the roller  151 . For example, one support sheet may have a size and shape corresponding to the area in which the support sheets  153  are disposed and the area between the support sheets  153  in  FIG.  3   . As such, the number, size, or shape of the support sheets  153  may be appropriately changed depending on the product actually manufactured. According to an embodiment, as the roller  151  rotates, the support sheet  153  may be rolled up on the outer circumferential surface of the roller  151  or may depart from the roller  151  and unfold in a flat plate shape between the display  103  and the third plate  121   c.  According to an embodiment, the support sheet  153  may be referred to as a “support belt”, “auxiliary belt”, “support film” or “auxiliary film”. 
     According to an embodiment, an end of the support sheet  153  may be connected to the first structure  101 , e.g., the first plate  111   a  (e.g., slide plate) and, in a closed state (e.g., the state shown in  FIG.  1   ), the support sheet  153  may be rolled on the roller  151 . Therefore, when the first plate  111   a  moves to the open state (e.g., the state shown in  FIG.  2   ), the support sheet  153  may be gradually positioned between the second structure  102  (e.g., the third plate  121   c ) and the display  103  (e.g., the second area A 2 ) or between the second structure  102  (e.g., the third plate  121   c ) and the multi-joint hinge structure  113 . For example, at least a portion of the support sheet  153  may be positioned to face the multi joint hinge structure  113  and may be selectively wound around the roller  151  as the first plate  111   a  slides. The support sheet  153  is generally disposed in contact with the multi joint hinge structure  113 , but the portion rolled up around the roller  151  may be substantially separated from the multi-joint hinge structure  113 . 
     According to an embodiment, the gap (e.g., the arrangement gap G of  FIG.  22   ) between the surface of the display  103  and the inner surface of the edge of the second plate  121   a  may differ depending on the degree to which the support sheet  153  is wound around the roller  151 . The smaller the arrangement gap G is, the easier it is to prevent foreign bodies from flowing in, but when the arrangement gap G is too small, the display  103  may contact or rub against the second plate  121   a.  When direct contact or friction occurs, the surface of the display  103  may be damaged or the sliding operation of the first structure  101  may be obstructed. 
     According to an embodiment, the support sheet  153  is wound around the roller  151  in the closed state, thus reducing the gap between the inner surface of the edge of the second plate  121   a  and the surface of the display  103  while keeping the surface of the display  103  not in contact with the second plate  121   a.  For example, it is possible to prevent foreign bodies from flowing into the inside of the second structure  102  by reducing the arrangement gap G in the closed state. According to an embodiment, as the first structure  101  (e.g., the first plate  111   a  or the slide plate) gradually moves to the open state, the support sheet  153  may move away from the roller  151  and gradually move to the space between the second structure  102  (e.g., the second plate  121   a  or the third plate  121   c ) and the multi joint hinge structure  113 . For example, as the first structure  101  moves to the open state, the arrangement gap G gradually increases, suppressing direct friction or contact between the display  103  and other structures (e.g., the second plate  121   a ) and hence preventing possible damage to the surface of the display  103  due to friction or contact. According to an embodiment, the thickness of the support sheet  153  may gradually increase as the distance between an end (e.g., the portion fixed to the roller  151 ) and the other end (e.g., the portion fixed to the first plate  111   a ) reduces. Use of the thickness profile of the support sheet  153  allows for adjustment of the arrangement gap G in the closed state and the open state. A configuration in which the gap (e.g., arrangement distance G) between the surface of the display  103  and the inner surface of the edge of the second plate  121   a  is adjusted is described below in more detail with reference to  FIG.  22   . 
     According to an embodiment, the electronic device  100  may include at least one elastic member  131  and  133  formed of a low density elastic body such as a sponge or a brush. For example, the electronic device  100  may include a first elastic member  131  mounted on one end of the display  103  and, according to an embodiment, the electronic device  100  may further include a second elastic member  133  mounted on the inner surface of the edge of the second plate  121   a.  The first elastic member  131  may be substantially disposed in the internal space of the second structure  102  and may be positioned to correspond to the edge of the second plate  121   a  in the open state (e.g., the state shown in  FIG.  2   ). According to an embodiment, the first elastic member  131  may move in the internal space of the second structure  102  as the first structure  101  slides. When the first structure  101  moves from the closed state to the open state, the first elastic member  131  may move toward the edge of the second plate  121   a.  When the first structure  101  reaches the open state, the first elastic member  131  may contact the inner surface of the edge of the second plate  121   a.  For example, in the open state, the first elastic member  131  may seal the gap between the inner surface of the edge of the second plate  121   a  and the surface of the display  103 . According to an embodiment, when moving from the closed state to the open state, the first elastic member  131  may move (e.g., slidingly contact) while in contact with the second plate  121   a.  For example, if a foreign body has been introduced in the gap between the second area A 2  and the second plate  121   a  in the closed state, when moving to the open state, the first elastic member  131  may discharge the foreign body to the outside of the second structure  102 . 
     According to an embodiment, the second elastic member  133  may be attached to the inner surface of the edge of the second plate  121   a,  and may be disposed to substantially face the inner surface of the display  103 . In the closed state, the gap (e.g., the arrangement gap) between the surface of the display  103  and the inner edge of the second plate  121   a  may be substantially determined by the second elastic member  133 . According to an embodiment, in the closed state, the second elastic member  133  may contact the surface of the display  103 , substantially sealing the arrangement gap G. According to an embodiment, the second elastic member  133  may be formed of a low-density elastic body such as a sponge or a brush, so that the surface of the display  103  may be prevented from damage despite direct contact with the display  103 . According to an embodiment, as the first structure  101  gradually moves to the open state, the arrangement gap G may increase. For example, the display  103  may gradually expose the second area A 2  to the outside of the second structure  102  substantially without contacting or rubbing against the second elastic member  133 . When the first structure  101  reaches the open state, the first elastic member  131  may contact the second elastic member  133 . For example, in the open state, the first elastic member  131  and the second elastic member  133  may seal the arrangement gap G, blocking influx of foreign bodies. 
     According to an embodiment, the electronic device  100  may further include a guide rail(s)  155  and/or an actuating member(s)  157 . The guide rail(s)  155  may be mounted on the second structure  102 , e.g., the third plate  121   c  to guide a sliding of the first structure  101  (e.g., the first plate  111   a  or the slide plate). The actuating member(s)  157  may include a spring or a spring module that provides an elastic force in a direction to allow both ends thereof to move away from each other. An end of the actuating member(s)  157  may be rotatably supported by the second structure  102 , and the other end may be rotatably supported by the first structure  101 . When the first structure  101  slides, both the ends of the actuating member(s)  157  may be positioned closest to each other (hereinafter, a ‘nearest point’) at any one point between the closed state and the open state. For example, in the interval between the nearest point and the closed state, the actuating member(s)  157  may provide an elastic force to the first structure  101  in a direction moving to the closed state and, in the interval between the nearest point and the open state, the actuating member(s)  157  may provide an elastic force to the first structure  101  in a direction moving to the open state. 
     In the following description, the components easy to understand from the description of the above embodiments are denoted with or without the same reference numerals and their detailed description may be skipped. According to an embodiment, an electronic device (e.g., the electronic device  100  of  FIGS.  1  to  3   ) may be implemented by selectively combining configurations of different embodiments, and the configuration of one embodiment may be replaced by the configuration of another embodiment. However, it is noted that the disclosure is not limited to a specific drawing or embodiment. 
       FIG.  4    is an exploded perspective view illustrating a flexible display (e.g., the display  103  of  FIGS.  1  to  3   ) mounting structure of an electronic device (e.g., the electronic device  100  of  FIGS.  1  to  3   ) according to an embodiment.  FIG.  5    is a bottom view illustrating a flexible display  103  of an electronic device  100  according to an embodiment.  FIG.  6    is a side, cross-sectional view illustrating an example in which a flexible display  103  of an electronic device  100  is mounted, according to an embodiment. 
     Referring to  FIGS.  4  to  6   , the first area A 1  of the display  103  may be mounted or attached to the first surface F 1  of the first structure  101 , and the second area A 2  may be attached or supported to the multi-joint hinge structure  113 . The multi-joint hinge structure  113  may guide or support the deformation of the second area A 2  into a curved shape and, in the state exposed to the outside, the multi-joint hinge structure  113  may keep the second area A 2  flat while suppressing deformation of the second area A 2  due to an external force (e.g., the user&#39;s contact). According to an embodiment, the first surface F 1  may be formed as the first plate  111   a  and the first bracket  111   b  are coupled together. According to an embodiment, a portion of the first area A 1  may be directly attached to the first bracket  111   b,  and another portion thereof may be directly attached to the first plate  111   a.    
     According to an embodiment, the electronic device (e.g., the electronic device  100  of  FIGS.  1  to  3   ) may further include a flexible printed circuit board  135 . The flexible printed circuit board  135  may connect the display  103  to a main circuit board (e.g., a printed circuit board received in the second structure  102  of  FIGS.  1  to  3   ). According to an embodiment, a driving chip of the display  103  may be mounted on the flexible printed circuit board  135 . When a touch panel is integrated into the display  103 , a touch panel driving chip may be mounted on the flexible printed circuit board  135 . According to an embodiment, the flexible printed circuit board  135  may be electrically connected to the display  103  or the printed circuit board by including connectors  135   a  and  135   b  provided at both ends respectively. According to an embodiment, a portion (hereinafter, a ‘bent portion B’) of the flexible printed circuit board  135  may be disposed in the electronic device  100  in a bent state. 
     According to an embodiment, with a portion of the first area A 1  mounted on the first bracket  111   b,  the flexible printed circuit board  135  may be coupled or electrically connected to the display  103  using the first connector  135   a.  When the first bracket  111   b  is mounted on the first plate  111   a,  a portion of the flexible printed circuit board  135  may be disposed between the first bracket  111   b  and the first plate  111   a.  For example, a portion of the flexible printed circuit board  135  may be received or fixed between the first bracket  111   b  and the first plate  111   a.  The first bracket  111   b  may be mounted on the first plate  111   a  while being coupled to the display  103 . 
     According to an embodiment, the first plate  111   a  may include an assembly hole  115   a  formed to penetrate at least a portion. Referring to  FIG.  6   , a portion of the edge of the display  103  may enter the assembly hole  115   a,  with the display  103  and the first plate  111   a  inclined with respect to the first plate  111   a  from the top side of the first plate  111   a.  When a portion of the edge of the display  103  enters the inside of the assembly hole  115   a,  the display  103  or the first bracket  111   b  may be bonded or mounted to the first plate  111   a.  In the state of being bonded or mounted to the first plate  111   a,  a portion (e.g., an outer surface of the edge) of the surface of the display  103  may be supported on a side-end structure SE or the inner surface of the assembly hole  115   a  of the first plate  111   a.    
     According to an embodiment, referring to  FIG.  6   , the second bracket  111   c  may be coupled or mounted on the bottom surface of the first plate  111   a,  closing the assembly hole  115   a.  For example, the display  103  and/or the first bracket  111   b  may be easily assembled to the first plate  111   a  through the assembly hole  115   a  and, after assembly, the assembly hole  115   a  may be closed using the second bracket  111   c,  enhancing the structural stability of the first structure  101 . According to an embodiment, a portion of the second bracket  111   c  may be exposed to the outside of the first structure  101  and may be used as a component decorating the exterior of the electronic device  100 . 
       FIG.  7    is a perspective view illustrating an example in which a flexible display (e.g., the display  103  of  FIGS.  1  to  3   ) of an electronic device (e.g., the electronic device  100  of  FIGS.  1  to  3   ) is mounted according to an embodiment.  FIG.  8    is a bottom view illustrating an example in which a flexible display  103  of an electronic device  100  is mounted, according to an embodiment. 
     Referring to  FIGS.  7  and  8   , when the display  103  is coupled to the first structure  101 , the surface of the display  103  may be flush with a portion (e.g., the upper end P 1  and lower end P 2 ) of the surface of the first structure  101 . For example, a portion of the surface of the first structure  101  and the surface of the display  103  may be located on one flat surface or one curved surface. Referring to  FIGS.  1  and  2   , at the top and bottom of the electronic device  100 , a portion of the surface of the first structure  101  and the surface of the display  103  may be described as positioned on one flat surface or curved surface. 
     According to an embodiment, the first plate  111   a  may further include a wiring hole  115   b,  and at least a portion, e.g., the bent portion B, of the flexible printed circuit board  135  may be placed inside the wiring hole  115   b.  In the state where the display  103  is mounted on the first structure  101 , a portion, e.g., the bent portion B, of the flexible printed circuit board  135  and the second connector  135   b  may be exposed to the second surface F 2  of the first structure  101 . For example, the bent portion B may be at least partially disposed inside the wiring hole  115   b,  and a portion of the flexible printed circuit board  135  between the second connector  135   b  and the bent portion B and/or the second connector  135   b  may be located on the second surface F 2  of the first structure  101 . The third plate  121   c  may include another wiring hole (not shown) similar to the wiring hole  115   b.  The second connector  135   b  may be disposed inside the second structure  102  or connected to the printed circuit board inside the second structure  102  via the other wiring hole formed in the third plate  121   c.    
     According to an embodiment, when the first structure  101  slides, the bent portion B of the flexible printed circuit board  135  may be deformed. For example, a tensional force may be applied to the flexible printed circuit board  135  due to the sliding of the first structure  101 , and this tensional force may be canceled by the deformation of the bent portion B. According to an embodiment, the bent portion B may be substantially deformed within the space inside the wiring hole  115   b.  According to an embodiment, an additional space (e.g., a dummy recess) may be provided on the surface of the second structure  102  (e.g., the third plate  121   c ) in an area corresponding to the wiring hole  115   b ) to receive a portion of the bent portion B. 
       FIG.  9    illustrates a cross-sectional view of the display  103  and/or first structure  101 , taken along line C 1  of  FIG.  7   .  FIG.  10    is a cross-sectional view of the display  103  and/or first structure  101 , taken along line C 2  of  FIG.  7   . 
     Referring to  FIGS.  9  and  10   , the display  103  may be supported by the first bracket  111   b  in an area adjacent to the edge of the inner surface, and a portion of the edge of the outer surface may be supported by the side end structure (SE) (e.g., the inner surface of the assembly hole  115   a  of  FIG.  6   ) of the first structure  101 . For example, at least a portion of the edge of the display  103  may be supported on the inner surface of the assembly hole  115   a  so that the inner surface of the display  103  may come in tight contact with the first bracket  111   b.  According to one embodiment, the entire edge of one side of the display  103  may be supported on the inner surface of the assembly hole  115   a,  and thus at least the first area A 1  of the display  103  may remain attached to the first structure  101 . In bonding to the mechanical structure, the adhesive component or the adhesive member may be denatured due to long-term possession or use, and the edge or corner of the flexible display (e.g., the display  103 ) may be separated from the mechanical structure, as set forth above. In the electronic device (e.g., the electronic device  100  of  FIGS.  1  to  3   ) According to an embodiment, when mounting the display  103  on the first structure  101 , an edge portion of the display  103  may be supported or pressed, preventing the display  103  from being separated from the mechanical structure (e.g., the first plate  111   a  or the first bracket  111   b ). 
     According to an embodiment, with the display  103  coupled to the first structure  101 , the surface of the display  103  may be flush with a portion of the surface of the first structure  101 . For example, at the upper or lower portion P 2  of the electronic device  100 , the surface of the display  103  and a portion of the surface of the first structure  101  may be located on the same flat surface or curved surface. According to one embodiment, although not assigned reference numerals in the drawings, the first plate  111   a  and/or the first bracket  111   b  may include a through hole or a recess, providing a space for receiving the flexible printed circuit board  135  or various electronic components disposed on the flexible printed circuit board  135 . 
       FIGS.  11  to  13    are views illustrating a structure in which a support sheet (e.g., the support sheet  153  of  FIG.  3   ) is mounted on a roller (e.g., the roller  151  of  FIG.  3   ) of an electronic device (e.g., the electronic device  100  of  FIGS.  1  to  3   ) according to an embodiment. 
     Referring to  FIG.  11   , the electronic device  100  may further include a mounting recess  251  formed in the surface of the roller  151 . A portion, e.g., an end, of the support sheet  153  may be fixed to the mounting recess  251 . According to an embodiment, the depth of the mounting recess  251  may gradually increase from the surface of the roller  151  along the circumferential direction, and the increased (or maximum depth of the mounting recess  251  may be equal to or larger than the thickness of one end of the support sheet  153 . 
     Referring to  FIG.  12   , the electronic device  100  may further include a mounting hole  253  formed in or extending from the surface of the roller  151  to the roller  151 . The mounting hole  253  may extend obliquely from the surface of the roller  151 , for example, obliquely with respect to the radial direction of the roller  151 . One end of the support sheet  153  may be inserted or mounted into the mounting hole  253 . 
     Referring to  FIG.  13   , the electronic device  100  may include the mounting recess  351  and/or the mounting hole  353  formed in the roller  151 . For the sake of brevity, the mounting recess  351  and the mounting hole  353  are separately described. However, according to an embodiment, the term ‘mounting recess’ or ‘mounting hole’ may be interpreted as encompassing the mounting recess  351  and mounting hole  353  of  FIG.  13   . According to an embodiment, the mounting recess  351  may have a depth gradually increasing along the circumferential direction from the surface of the roller  151 , and the mounting hole  353  may extend from the end of the mounting recess  351  to the inside of the roller  151 . An end of the support sheet  153  may be inserted or mounted into the mounting hole  353 , and a portion of the support sheet  153  may be disposed on, or fixed to, the mounting recess  351 . 
       FIG.  14    is a perspective view illustrating an electronic device (e.g., the electronic device  100  of  FIGS.  1  to  3   ) according to an embodiment, wherein a portion of a flexible display (e.g., the display  103  of  FIGS.  1  to  3   ) is received in a second structure (e.g., the second structure  102  of  FIGS.  1  to  3   ).  FIG.  15    is a perspective view illustrating a state in which the flexible display  103  is removed from the electronic device  100  of  FIG.  14   .  FIG.  16    is a cross-sectional view illustrating an electronic device  100  according to an embodiment, wherein a portion of a flexible display  103  is received in a second structure  102 .  FIG.  17    is an enlarged, cross-sectional view illustrating a portion of  FIG.  16   . 
     Referring to  FIGS.  14  to  17   , in the closed state, the first area A 1  of the display  103  may be exposed to the outside of the electronic device  100  (e.g., the second structure  102 ), and the second area A 2  may be received in the second structure  102 . For example, in the closed state, the first structure  101  may be positioned adjacent to the roller  151 , and the support sheet  153  may be rolled up around the roller  151 . As much as the support sheet  153  is wound around the roller  151 , the distance, e.g., the arrangement gap (e.g., the arrangement gap G of  FIG.  22   ), between the surface of the display  103  and the inner surface of the edge of the second plate  121   a  may be reduced. According to an embodiment, as the arrangement gap G decreases, it is possible to suppress or prevent external foreign bodies from flowing into the inside of the second structure  102  through the arrangement gap G. According to an embodiment, the second area A 2  or the multi-joint hinge structure  113  inside the second structure  102  may be generally received in a space between the second plate  121   a  (e.g., rear case) and the support member  121   d.  As described above, the space in which the second area A 2  or the multi-joint hinge structure  113  is received may be separated by the support member  121   d  from the space (e.g., the space between the third plate  121   c  and the support member  121   d ) in which the printed circuit board is received. 
     According to an embodiment, the rods  114  of the multi-joint hinge structure  113  may be generally arranged along the sliding direction {circle around ( 1 )} of the first structure  101 , and some may be arranged around the roller  151 . The multi-joint hinge structure  113  may support the second area A 2  of the display  103  in a flat shape while maintaining a substantially flat shape. According to an embodiment, the multi joint hinge structure  113  may deform a portion of the second area A 2  into a curved shape while deforming into a curved shape around the roller  151 . According to an embodiment, in the closed state, the first elastic member (e.g., the first elastic member  131  of  FIG.  3   ) may be disposed to face the inner surface of the second plate  121   a  inside the second structure  102 . When the first structure  101  gradually moves to the open state, the first elastic member  131  may move in a direction toward the edge of the second plate  121   a,  e.g., the second elastic member  133 . 
     According to an embodiment, when moving to the open state, the first structure  101  may gradually move away from the roller  151 , and the second area A 2  or the multi joint hinge structure  113  may move to the outside of the second structure  102 . For example, as the first structure  101  moves to the open state, the second area A 2 , along with the multi-joint hinge structure  113  connected to the first structure  101 , may gradually be exposed to the outside of the second structure. When the first structure  101  slides, the roller  151  may rotate correspondingly and guide the multi-joint hinge structure  113  to the outside of the second structure  102 . For example, while the multi-joint hinge structure  113  moves to the outside of the second structure  102  (or while being received in the second structure  102 ), the roller  151  may mitigate direct contact or friction between the multi joint hinge structure  113  and the second structure  102 . According to an embodiment, since an end of the support sheet  153  is connected to the first structure  101 , the support sheet  153  may gradually depart from the roller  151  and move onto the second structure  102  (e.g., the third plate  121   c ) as the first structure  101  slides. For example, the support sheet  153  may be deformed into a flat plate shape while gradually moving between the display (or multi-joint hinge structure) and the second structure (e.g., the second plate  121   a  or the third plate  121   c ). When reaching the open state, the support sheet  153  may be disposed in an unfolded state inside (e.g., the rear surface) the display  103 , for example, the second area A 2 . According to an embodiment, as the support sheet  153  gradually escapes from the roller  151 , the gap (e.g., the arrangement gap G of  FIG.  22   ) between the surface of the display  103  and the second plate  121   a  (e.g., the inner side of the edge) may gradually increase. For example, as the first structure  101  moves from the closed state to the open state, the gap between the surface of the display  103  and the second plate  121   a  increases, so that the second area A 2  may move to the outside of the second structure  102  without causing the surface of the display  103  to contact or rub against other structures. 
       FIG.  18    is a perspective view illustrating an electronic device (e.g., the electronic device  100  of  FIGS.  1  to  3   ) according to an embodiment, wherein most of a flexible display (e.g., the display  103  of  FIGS.  1  to  3   ) is exposed to the outside of a second structure (e.g., the second structure  102  of  FIGS.  1  to  3   ).  FIG.  19    is a perspective view illustrating a state in which the flexible display  103  is removed from the electronic device  100  of  FIG.  18   .  FIG.  20    is a cross-sectional view illustrating an electronic device  100  according to an embodiment, wherein most of a flexible display  103  is exposed to the outside of a second structure  102 .  FIG.  21    is an enlarged, cross-sectional view illustrating a portion of  FIG.  20   . 
     Referring to  FIGS.  18  to  21   , in the open state, the second area A 2  together with the first area A 1  of the display  103  may be exposed to the outside of the second structure  102 . For example, in the open state, the first structure  101  may be located away from the roller  151 , and the second area A 2 , the multi-joint hinge structure  113  and/or the support sheet  153  may be located in an area between the roller  151  and the first plate  111   a  (or the first area A 1 ). According to an embodiment, as the first structure  101  moves to the open state, the support sheet  153  may be positioned between the display  103  (e.g., the second area A 2 ) and the second structure  102  or between the multi-joint hinge structure  113  and the second structure  102 . In the open state, since the support sheet  153  substantially gradually departs from the roller  151  and is disposed in a flat plate shape on the second structure  102 , the arrangement gap (e.g., the gap between the surface of the display  103  and the inner surface of the edge of the second plate  121   a ) may be increased. When the first structure  101  reaches the open state, the first elastic member  131  may be positioned adjacent to the edge of the inner surface of the second plate  121   a.  According to an embodiment, in the open state, the first elastic member  131  may contact the inner surface of the second plate  121   a,  thereby substantially sealing the gap between the edge of the second plate  121   a  and the display  103 . For example, as the gap between the edge of the second plate  121   a  and the display  103  is sealed in the closed state and/or, in the open state, the second elastic member  133  substantially seals the gap between the edge of the second plate  121   a  and the display  103 , it is possible to prevent foreign bodies from flowing into the inside of the second structure  102  through the gap between the edge of the second plate  121   a  and the display  103 . 
       FIG.  22    is a view illustrating a structure in which a support sheet (e.g., the support sheet  153  of  FIG.  3   ) of an electronic device (e.g., the electronic device  100  of  FIGS.  1  to  3   ) is wound around a roller (e.g., the roller  151  of  FIG.  3   ) according to an embodiment. 
     Referring to  FIG.  22   , according to an embodiment, the second elastic member  133  is disposed on the inner surface of the edge of the second plate  121   a.  In the following detailed description, the “inner surface of the edge of the second plate  121   a ” may mean a point defining the boundary between the internal space and the outer space of the second structure  102 . As an example, this point is denoted as ‘IE’ in  FIG.  22   , and such a point is referred to below as a “boundary point (IE)”. Although  FIG.  22    illustrates a cross section of a portion of the electronic device  100 , and the boundary point IE is shown as a point, the boundary point IE may substantially mean a line parallel to the first side wall  123   a  or the rotation axis R.  FIG.  22    shows a configuration in which the boundary point (IE) is disposed in the second elastic member  133  but, for the sake of brevity of the description, a configuration in which the “boundary point (IE) is positioned at the edge of the second plate  121   a  or in the inner surface of the edge” may be described. For example, according to an embodiment, the boundary point IE may be located at the edge of the second plate  121   a  and, in a structure in which the second elastic member  133  is disposed, the boundary point IE may be positioned in the second elastic member  133 . 
     Referring to  FIG.  22   , the electronic device (e.g., the electronic device  100  of  FIGS.  1  to  3   ) may include a mounting hole  453  formed in the roller  151 . The mounting hole  453  may extend from the surface of the roller  151  to the inside, for example, along the radial direction of the roller  151 . An end of the support sheet  153  may be inserted or, fixed, into the mounting hole  453 . According to an embodiment, the electronic device  100  may further include a fixing member  455  received in the mounting hole  453 . The fixing member  455  may tightly contact an inner wall of the mounting hole  453  and/or an end of the support sheet  153 , for example. For example, the fixing member  455  may fix an end of the support sheet  153  to the inside of the mounting hole  453 . According to an embodiment, the fixing member  455  may be formed of a material including an elastic material (e.g., silicon or rubber) and may be fixed inside the mounting hole  453  in a compressed state, allowing one end of the support sheet  153  to be stably fixed inside the mounting hole  453 . 
     According to an embodiment, the gap (e.g., arrangement gap G) between the surface of the display  103  and the inner surface (e.g., the boundary point IE) of the edge of the second plate  121   a  may be a passage through which foreign bodies may flow into the inside of the second structure  102 . As discussed above, in the closed state, the support sheet  153  may be wound around the roller  151  so that the arrangement gap G may be reduced and, in the open state, the arrangement gap G is increase but may be sealed by the first elastic member  131  as shown in  FIG.  21   . According to an embodiment, the distance (D) between the boundary point (IE) and the rotation axis (R) of the roller  151  may include the arrangement gap (G) and the thickness of the support sheet  153  rolled up around the roller  151 . The distance D, the radius of the roller  151 , and the thickness of the display  103  or the multi-joint hinge structure  113  may be substantially constant. For example, the arrangement gap G and the thickness of the support sheet  153  rolled up around the roller  151  between the inner surface (e.g., boundary point IE) of the edge of the second plate  121   a  and the rotation axis R of the roller  151  may be inversely proportional. For example, in the closed state, the support sheet  153  is wound around the roller  151 , reducing (minimizing) the arrangement gap G. As the first structure  101  (e.g., the first plate  111   a ) moves to the open state, the thickness of the support sheet  153  rolled up on the roller  151  gradually decreases, increasing the arrangement gap G. 
     According to an embodiment, in the closed state, for example, in a state in which the second area A 2  or the multi joint hinge structure  113  is substantially received inside the second structure  102 , at least two different portions of the support sheet  153  may overlap (OL) each other between the boundary point IE and the rotation axis R. For example, when the thickness of the support sheet  153  is constant and is defined as “T”, the sum of the thicknesses of the support sheet  151  wound around the roller  151  may be defined as “n*T”. Here, ‘n’ may mean the number of windings of the support sheet  153  or the number of overlaps of different portions of the support sheet  153  between the boundary point IE and the rotation axis R and, in the state where the support sheet  153  is not wound around the roller  151  (e.g., the state where the support sheet  153  does not exist between the boundary point IE and the rotation axis R), the sum of the thicknesses of the wound support sheet  153  may be defined as “0 (zero).” For example, if the increased (maximum) value of the arrangement gap G, e.g., the arrangement gap G in the open state, is “Gmax”, the arrangement gap G may be defined as “Gmax−n*T”. In  FIG.  22   , the thickness of the support sheet  153  may be about 0.2 mm and, since the two portions of the support sheet  153  overlap between the boundary point IE and the rotation axis R, the arrangement gap G may be calculated as “Gmax−2*0.2”. For example, although there may be some differences depending on embodiments, the reduced (minimum) arrangement gap may be approximately 0.4 mm smaller than the increased (maximum) arrangement gap Gmax in the illustrated embodiment. 
     According to an embodiment, the support sheet  153  may have a profile that gradually increases in thickness from a portion mounted on the roller  151  to a portion connected to the first structure  101  (e.g., the first plate  111   a ). For example, the sum of the thicknesses of the support sheet  153  rolled on the roller  151  between the boundary point IE and the rotation axis R may gradually change according to the rotation angle (or position) of the roller  151 . According to an embodiment, the arrangement gap G may gradually increase according to the sliding of the first structure  101  to the open state or the rotation of the roller  151  while having a reduced (minimum) value in the closed state. For example, as the first structure  101  moves to the open state, the arrangement gap G may increase, and the display  103  may gradually move away from another structure, for example, the inner surface of the second plate  121   a.    
     According to an embodiment, an electronic device (e.g., the electronic device  100  of  FIGS.  1  to  3   ) comprises a first structure (e.g., the first structure  101  of  FIGS.  1  to  3   ) including a first plate (e.g., the first plate  111   a  of  FIGS.  1  to  3   ) providing a first surface (e.g., the first surface F 1  of  FIG.  3  or  4   ) and a second surface (e.g., the second surface F 2  of  FIG.  8   ) facing away from the first surface, a second structure (e.g., the second structure  102  of  FIGS.  1  to  3   ) coupled to surround at least a portion of the first structure and guiding a sliding of the first structure in a direction parallel with the first surface or the second surface of the first structure, a roller (e.g., the roller  151  of  FIG.  3   ) rotatably mounted on an edge of the second structure, a flexible display (e.g., the display  103  of  FIGS.  1  to  3   ) including a first area (e.g., the first area A 1  of  FIG.  3   ) mounted on the first surface of the first structure and a second area (e.g., the second area A 2  of  FIG.  3   ) extending from the first area, the second area of the flexible display guided at least partially by the roller to be inserted or received from a side of the second structure to an inside of the second structure or exposed to an outside of the second structure as the first structure is slid, and at least one support sheet (e.g., the support sheet  153  of  FIG.  3   ) mounted on the roller and selectively wound around the roller as the roller rotates, wherein the support sheet is wound around the roller when the second area is received inside the second structure, and is unfolded inside (e.g., the rear surface of the second area) the second area when the second area is exposed to the outside of the second structure. 
     According to an embodiment, the electronic device may further comprise a mounting recess (e.g., the mounting recess  251  or  351  of  FIG.  11  or  13   ) formed in a surface of the roller. A portion of the support sheet may be fixed to the mounting recess. 
     According to an embodiment, the electronic device may further comprise a mounting hole (e.g., the mounting hole  253  or  353  of  FIG.  12  or  13   ) formed from a surface of the roller to an inside of the roller. An end of the support sheet may be mounted inside the mounting hole. 
     According to an embodiment, the plurality of support sheets may be arranged along a direction of a rotation axis (e.g., the rotation axis R of  FIG.  3  or  22   ) of the roller. The support sheets may extend in a direction perpendicular to the rotation axis. 
     According to an embodiment, the second structure may include a second plate (e.g., the second plate  121   a  of  FIG.  3   ) facing away from the first surface. The second area may be inserted into an inside of the second structure through a gap between the roller and the second plate. 
     According to an embodiment, a gap (e.g., the arrangement gap G of  FIG.  22   ) between the display and an inner surface of an edge of the second plate when the second area is received inside the second structure (e.g., the state shown in  FIG.  1   ) may be smaller than a gap between the display and the inner surface of the edge of the second plate when the second area is exposed to the outside of the second structure (e.g., the state shown in  FIG.  2   ). 
     According to an embodiment, the second structure may include a second plate (e.g., the second plate  121   a  of  FIG.  3   ) facing away from the first surface, a first side wall (e.g., the first side wall  123   a  of  FIGS.  1  to  3   ) perpendicular to the second plate, a second side wall (e.g., the second side wall  123   b  of  FIGS.  1  to  3   ) perpendicular to the second plate and the first side wall, and a third side wall (e.g., the third side wall  123   c  of  FIGS.  1  to  3   ) perpendicular to the second plate and the first side wall and parallel to the second side wall. The roller may be rotatably mounted between the second side wall and the third side wall in a position adjacent to an edge of the second plate. The roller may rotate about the rotation axis extending parallel to the first side wall. 
     According to an embodiment, the flexible display may be inserted into the inside of the second structure through a gap between an inner surface of the edge of the second plate and the roller. 
     According to an embodiment, the electronic device may further comprise an elastic member (e.g., the first elastic member  131  of  FIG.  3   ) mounted on an end of the flexible display and moving inside the second structure as the first structure slides. The elastic member may slidingly contact the second plate as the second area gradually moves to a position where the second area is exposed to the outside of the second structure and, when the second area is exposed to the outside of the second structure, the elastic member may be positioned between the inner surface of the edge of the second plate and a surface of the flexible display. 
     According to an embodiment, the electronic device may further comprise a multi joint hinge structure (e.g., the multi joint hinge structure  113  of  FIG.  16  or  17   ) including a plurality of rods (e.g., the rods  114  of  FIG.  16  or  17   ) supporting the second area and connected to the first structure to move over the second structure as the first structure slides. As the first structure slides, a portion of the multi joint hinge structure may be deformed to a curved shape in a position corresponding to the roller. 
     According to an embodiment, the support sheet may have a first end fixed to the roller and a second end fixed to the first structure. At least a portion of the support sheet may be positioned to face the multi joint hinge structure or wound around the roller. 
     According to an embodiment, the rods may be arranged along a direction perpendicular to the rotation axis, in parallel to the rotation axis. When the second area is exposed to the outside of the second structure, the support sheet may be positioned between the second structure and the multi-joint hinge structure. 
     According to an embodiment, an electronic device may comprise a housing (e.g., the second structure  102  of  FIGS.  1  to  3   ) including a rear case (e.g., the second plate  121   a  of  FIG.  3   ) and a side wall (e.g., the side walls  123   a,    123   b,  and  123   c  of  FIGS.  1  to  3   ) extending from the rear case, a roller (e.g., the roller  151  of  FIG.  3   ) rotatably mounted in the housing while being positioned adjacent to a portion of the side wall, at least one support sheet (e.g., the support sheet  153  of  FIG.  3   ) mounted on the roller and selectively wound around the roller as the roller rotates, and a flexible display (e.g., the display  103  of  FIGS.  1  to  3   ) including a first area exposed to an outside of the housing and a second area extending from the first area, the second area of the flexible display guided by the roller to be at least partially inserted or received inside the housing or exposed to the outside of the housing. The support sheet may be gradually wound around the roller as the second area is gradually received inside the housing. When the second area is exposed to the outside of the housing, the support sheet may be positioned between the rear case and the second area. 
     According to an embodiment, when the second area is received inside the housing, at least two different portions (e.g., the portions denoted with ‘OL’ in  FIG.  22   ) of the support sheet may be disposed to overlap between an edge of the rear case and a rotation axis of the roller. 
     According to an embodiment, the electronic device may further comprise a multi joint hinge structure including a plurality of rods supporting the second area and, as the roller rotates, guided by the roller to be inserted or received inside the housing or extracted to the outside of the housing. The multi-joint hinge structure may be at least partially deformed to a curved shape in a position corresponding to the roller. 
     According to an embodiment, when the second area is exposed to the outside of the housing, the support sheet may be disposed between the rear case and the multi-joint hinge structure. 
     According to an embodiment, the plurality of support sheets may be arranged along a direction of a rotation axis of the roller. The support sheets may extend in a direction perpendicular to the rotation axis. 
     According to an embodiment, the electronic device may further comprise a slide plate slidably coupled to the housing. The first area may be mounted on the slide plate. 
     According to an embodiment, the support sheet may have a first end fixed to the roller and a second end fixed to the slide plate. At least a portion of the support sheet may be positioned to face the second area or is wound around the roller. 
     According to an embodiment, the electronic device may further comprise at least one elastic member (e.g., the first elastic member  131  or second elastic member  133  of  FIG.  3   ) mounted on at least one of an end of the flexible display and an inner surface of an edge of the rear case. When at least the second area is exposed to the outside of the housing, the elastic member may be positioned between the inner surface of the edge of the rear case and a surface of the flexible display. 
     Although the present disclosure has been described with various embodiments, various changes and modifications may be suggested to one skilled in the art. It is intended that the present disclosure encompass such changes and modifications as fall within the scope of the appended claims.