Patent Publication Number: US-2023156116-A1

Title: Electronic device including rollable or slidable display

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a continuation application, claiming priority under § 365(c), of an International application No. PCT/KR2021/009895, filed on Jul. 29, 2021, which is based on and claims the benefit of a Korean patent application number 10-2020-0094371, filed on Jul. 29, 2020, in the Korean Intellectual Property Office, and of a Korean patent application number 10-2021-0071011, filed on Jun. 1, 2021, in the Korean Intellectual Property Office, the disclosure of each of which is incorporated by reference herein in its entirety. 
    
    
     BACKGROUND 
     1. Field 
     The disclosure relates to an electronic device including a rollable or slidable display. 
     2. Description of Related Art 
     A display may play a key role in a portable electronic device. The display may visually display information. Factors such as design, size, and quality of a display may play an important role when consumers select an electronic device. 
     With the recent development of display technology, flexible displays are being released to the market. By using such a flexible display, a display having a screen, the size of which is variable may also be implemented. For example, an electronic device including a display rollable by a specific mechanical material or having a screen size increasing or decreasing through sliding is also being developed. 
     The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure. 
     SUMMARY 
     Especially, with the continuous size reduction of portable electronic devices, an extra space is decreasing. A space for receiving an external device (e.g., a stylus pen or a secure digital (SD) card) which increases the usability of an electronic device or a space in which a device (e.g., a camera, a speaker, a physical button, or an auxiliary display) configured to perform a specific function may be disposed is also gradually disappearing. 
     Aspects of the disclosure are to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the disclosure is to provide an electronic device including a rollable or slidable display, particularly, an electronic device using an extra space which can be secured according to movement of a display. 
     Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments. 
     In accordance with an aspect of the disclosure, an electronic device is provided. The electronic device includes a first housing, a second housing slidably coupled with respect to the first housing, a display at least partially fixed to the second housing and comprising an information display region increasing or decreasing according to the sliding of the second housing, the information display region being a part of the electronic device visible to the exterior, and a support member including a bendable structure and configured to support at least a part of the display and move according to the sliding of the second housing, wherein the display is configured such that a size of the information display region increases in case that the second housing slides in a first direction at a reference position at which an end of the second housing and an end of the first housing are substantially aligned with each other, and a size of the information display region decreases in case that the second housing slides in a second direction opposite to the first direction at the reference position. 
     In accordance with another aspect of the disclosure, an electronic device is provided. The electronic device includes a first housing, a second housing slidably coupled with respect to the first housing, a display at least partially fixed to the second housing and comprising an information display region increasing or decreasing according to the sliding of the second housing, the information display region being a part of the electronic device visible to the outside, a support member including a bendable structure and configured to support at least a part of the display and move according to the sliding of the second housing, and a hidden region positioned between the second housing and the first housing and exposed to the outside of the electronic device by the sliding of the second housing with respect to the first housing. 
     According to various embodiments disclosed herein, an extra space in which various structures or devices for increasing the usability of an electronic device may be disposed can be secured. 
     In addition, the electronic device may perform various operations by detecting the movement of a display as an input and thus may improve the usability thereof. 
     Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features, and advantages of certain embodiments of the disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
         FIG.  1    is a block diagram of an electronic device in a network environment, according to an embodiment of the disclosure; 
         FIGS.  2 A,  2 B, and  2 C  illustrate various states of an electronic device according to various embodiments of the disclosure; 
         FIG.  3 A  illustrates a state in which an electronic device is being used according to an embodiment of the disclosure; 
         FIG.  3 B  is an exploded perspective view of an electronic device according to an embodiment of the disclosure; 
         FIGS.  3 C and  3 D  are cross-sectional views of the electronic device shown in  FIG.  2 A , taken along line A-A, according to various embodiments of the disclosure; 
         FIG.  4 A  is a cross-sectional view of the electronic device shown in  FIG.  2 A , taken along line D-D according to an embodiment of the disclosure; 
         FIG.  4 B  is a cross-sectional view of the electronic device shown in  FIG.  2 B , taken along line E-E according to an embodiment of the disclosure; 
         FIG.  4 C  is a cross-sectional view of the electronic device shown in  FIG.  2 C , taken along line F-F according to an embodiment of the disclosure; 
         FIGS.  5 A and  5 B  illustrate the relationship between a second housing and a guide rail of a support member according to various embodiments of the disclosure; 
         FIGS.  6 A,  6 B,  6 C, and  6 D  illustrate an electronic device according to various embodiments of the disclosure; 
         FIG.  7    is a block diagram of an electronic device according to an embodiment of the disclosure; 
         FIG.  8 A  is a flowchart of operations of an electronic device according to an embodiment of the disclosure; 
         FIG.  8 B  illustrates one of the operations of an electronic device according to an embodiment of the disclosure; 
         FIGS.  9 A and  9 B  illustrate examples of an external device received in a hidden region according to various embodiments of the disclosure; 
         FIG.  9 C  is a flowchart showing operations of an electronic device including a hidden region according to an embodiment of the disclosure; and 
         FIGS.  10 A,  10 B,  10 C,  10 D,  10 E, and  10 F  are views showing operations of an electronic device according to an input/output device disposed in a hidden region according to various embodiments of the disclosure. 
     
    
    
     Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures. 
     DETAILED DESCRIPTION 
     The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness. 
     The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the disclosure is provided for illustration purpose only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents. 
     It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces. 
     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. 
     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. 
       FIG.  1    is a block diagram illustrating an electronic device in a network environment according to an embodiment of the disclosure. 
     Referring to  FIG.  1   , an electronic device  101  in a network environment  100  may communicate with an electronic device  102  via a first network  198  (e.g., a short-range wireless communication network), or at least one of an electronic device  104  or a server  108  via a second network  199  (e.g., a long-range wireless communication network). According to an embodiment, the electronic device  101  may communicate with the electronic device  104  via the server  108 . According to an embodiment, the electronic device  101  may include a processor  120 , memory  130 , an input module  150 , a sound output module  155 , a display module  160 , an audio module  170 , a sensor module  176 , an interface  177 , a connecting terminal  178 , a haptic module  179 , a camera module  180 , a power management module  188 , a battery  189 , a communication module  190 , a subscriber identification module(SIM)  196 , or an antenna module  197 . In some embodiments, at least one of the components (e.g., the connecting terminal  178 ) may be omitted from the electronic device  101 , or one or more other components may be added in the electronic device  101 . In some embodiments, some of the components (e.g., the sensor module  176 , the camera module  180 , or the antenna module  197 ) may be implemented as a single component (e.g., the display module  160 ). 
     The processor  120  may execute, for example, software (e.g., a program  140 ) to control at least one other component (e.g., a hardware or software component) of the electronic device  101  coupled with the processor  120 , and may perform various data processing or computation. According to one embodiment, as at least part of the data processing or computation, the processor  120  may store a command or data received from another component (e.g., the sensor module  176  or the communication module  190 ) in volatile memory  132 , process the command or the data stored in the volatile memory  132 , and store resulting data in non-volatile memory  134 . The non-volatile memory may include internal memory  136  and external memory  138 . According to an embodiment, the processor  120  may include a main processor  121  (e.g., a central processing unit (CPU) or an application processor (AP)), or an auxiliary processor  123  (e.g., a graphics processing unit (GPU), a neural processing unit (NPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that is operable independently from, or in conjunction with, the main processor  121 . For example, when the electronic device  101  includes the main processor  121  and the auxiliary processor  123 , the auxiliary processor  123  may be adapted to consume less power than the main processor  121 , or to be specific to a specified function. The auxiliary processor  123  may be implemented as separate from, or as part of the main processor  121 . 
     The auxiliary processor  123  may control at least some of functions or states related to at least one component (e.g., the display module  160 , the sensor module  176 , or the communication module  190 ) among the components of the electronic device  101 , instead of the main processor  121  while the main processor  121  is in an inactive (e.g., sleep) state, or together with the main processor  121  while the main processor  121  is in an active state (e.g., executing an application). According to an embodiment, the auxiliary processor  123  (e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., the camera module  180  or the communication module  190 ) functionally related to the auxiliary processor  123 . According to an embodiment, the auxiliary processor  123  (e.g., the neural processing unit) may include a hardware structure specified for artificial intelligence model processing. An artificial intelligence model may be generated by machine learning. Such learning may be performed, e.g., by the electronic device  101  where the artificial intelligence is performed or via a separate server (e.g., the server  108 ). Learning algorithms may include, but are not limited to, e.g., supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning. The artificial intelligence model may include a plurality of artificial neural network layers. The artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), deep Q-network or a combination of two or more thereof but is not limited thereto. The artificial intelligence model may, additionally or alternatively, include a software structure other than the hardware structure. 
     The memory  130  may store various data used by at least one component (e.g., the processor  120  or the sensor module  176 ) of the electronic device  101 . The various data may include, for example, software (e.g., the program  140 ) and input data or output data for a command related thereto. The memory  130  may include the volatile memory  132  or the non-volatile memory  134 . 
     The program  140  may be stored in the memory  130  as software, and may include, for example, an operating system (OS)  142 , middleware  144 , or an application  146 . 
     The input module  150  may receive a command or data to be used by another component (e.g., the processor  120 ) of the electronic device  101 , from the outside (e.g., a user) of the electronic device  101 . The input module  150  may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen). 
     The sound output module  155  may output sound signals to the outside of the electronic device  101 . The sound output module  155  may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as playing multimedia or playing record. The receiver may be used for receiving incoming calls. According to an embodiment, the receiver may be implemented as separate from, or as part of the speaker. 
     The display module  160  may visually provide information to the outside (e.g., a user) of the electronic device  101 . The display module  160  may include, for example, a display, a hologram device, or a projector and control circuitry to control a corresponding one of the display, hologram device, and projector. According to an embodiment, the display module  160  may include a touch sensor adapted to detect a touch, or a pressure sensor adapted to measure the intensity of force incurred by the touch. 
     The audio module  170  may convert a sound into an electrical signal and vice versa. According to an embodiment, the audio module  170  may obtain the sound via the input module  150 , or output the sound via the sound output module  155  or a headphone of an external electronic device (e.g., an electronic device  102 ) directly (e.g., wiredly) or wirelessly coupled with the electronic device  101 . 
     The sensor module  176  may detect an operational state (e.g., power or temperature) of the electronic device  101  or an environmental state (e.g., a state of a user) external to the electronic device  101 , and then generate an electrical signal or data value corresponding to the detected state. According to an embodiment, the sensor module  176  may include, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor. 
     The interface  177  may support one or more specified protocols to be used for the electronic device  101  to be coupled with the external electronic device (e.g., the electronic device  102 ) directly (e.g., wiredly) or wirelessly. According to an embodiment, the interface  177  may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface. 
     A connecting terminal  178  may include a connector via which the electronic device  101  may be physically connected with the external electronic device (e.g., the electronic device  102 ). According to an embodiment, the connecting terminal  178  may include, for example, a HDMI connector, a USB connector, a SD card connector, or an audio connector (e.g., a headphone connector). 
     The haptic module  179  may convert an electrical signal into a mechanical stimulus (e.g., a vibration or a movement) or electrical stimulus which may be recognized by a user via his tactile sensation or kinesthetic sensation. According to an embodiment, the haptic module  179  may include, for example, a motor, a piezoelectric element, or an electric stimulator. 
     The camera module  180  may capture a still image or moving images. According to an embodiment, the camera module  180  may include one or more lenses, image sensors, image signal processors, or flashes. 
     The power management module  188  may manage power supplied to the electronic device  101 . According to one embodiment, the power management module  188  may be implemented as at least part of, for example, a power management integrated circuit (PMIC). 
     The battery  189  may supply power to at least one component of the electronic device  101 . According to an embodiment, the battery  189  may include, for example, a primary cell which is not rechargeable, a secondary cell which is rechargeable, or a fuel cell. 
     The communication module  190  may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device  101  and the external electronic device (e.g., the electronic device  102 , the electronic device  104 , or the server  108 ) and performing communication via the established communication channel. The communication module  190  may include one or more communication processors that are operable independently from the processor  120  (e.g., the application processor (AP)) and supports a direct (e.g., wired) communication or a wireless communication. According to an embodiment, the communication module  190  may include a wireless communication module  192  (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module  194  (e.g., a local area network (LAN) communication module or a power line communication (PLC) module). A corresponding one of these communication modules may communicate with the external electronic device via the first network  198  (e.g., a short-range communication network, such as Bluetooth™, wireless-fidelity (Wi-Fi) direct, or infrared data association (IrDA)) or the second network  199  (e.g., a long-range communication network, such as a legacy cellular network, a fifth-generation (5G) network, a next-generation communication network, the Internet, or a computer network (e.g., LAN or wide area network (WAN)). These various types of communication modules may be implemented as a single component (e.g., a single chip), or may be implemented as multi components (e.g., multi chips) separate from each other. The wireless communication module  192  may identify and authenticate the electronic device  101  in a communication network, such as the first network  198  or the second network  199 , using subscriber information (e.g., international mobile subscriber identity (IMSI)) stored in the subscriber identification module  196 . 
     The wireless communication module  192  may support a 5G network, after a fourth-generation (4G) network, and next-generation communication technology, e.g., new radio (NR) access technology. The NR access technology may support enhanced mobile broadband (eMBB), massive machine type communications (mMTC), or ultra-reliable and low-latency communications (URLLC). The wireless communication module  192  may support a high-frequency band (e.g., the millimeter(mm) Wave band) to achieve, e.g., a high data transmission rate. The wireless communication module  192  may support various technologies for securing performance on a high-frequency band, such as, e.g., beamforming, massive multiple-input and multiple-output (massive MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module  192  may support various requirements specified in the electronic device  101 , an external electronic device (e.g., the electronic device  104 ), or a network system (e.g., the second network  199 ). According to an embodiment, the wireless communication module  192  may support a peak data rate (e.g., 20 Gbps or more) for implementing eMBB, loss coverage (e.g., 164 dB or less) for implementing mMTC, or U-plane latency (e.g., 0.5 ms or less for each of downlink (DL) and uplink (UL), or a round trip of lms or less) for implementing URLLC. 
     The antenna module  197  may transmit or receive a signal or power to or from the outside (e.g., the external electronic device) of the electronic device  101 . According to an embodiment, the antenna module  197  may include an antenna including a radiating element composed of a conductive material or a conductive pattern formed in or on a substrate (e.g., a printed circuit board (PCB)). According to an embodiment, the antenna module  197  may include a plurality of antennas (e.g., array antennas). In such a case, at least one antenna appropriate for a communication scheme used in the communication network, such as the first network  198  or the second network  199 , may be selected, for example, by the communication module  190  (e.g., the wireless communication module  192 ) from the plurality of antennas. The signal or the power may then be transmitted or received between the communication module  190  and the external electronic device via the selected at least one antenna. According to an embodiment, another component (e.g., a radio frequency integrated circuit (RFIC)) other than the radiating element may be additionally formed as part of the antenna module  197 . 
     According to various embodiments, the antenna module  197  may form a mmWave antenna module. According to an embodiment, the mmWave antenna module may include a printed circuit board, a RFIC disposed on a first surface (e.g., the bottom surface) of the printed circuit board, or adjacent to the first surface and capable of supporting a designated high-frequency band (e.g., the mmWave band), and a plurality of antennas (e.g., array antennas) disposed on a second surface (e.g., the top or a side surface) of the printed circuit board, or adjacent to the second surface and capable of transmitting or receiving signals of the designated high-frequency band. 
     At least some of the above-described components may be coupled mutually and communicate signals (e.g., commands or data) therebetween via an inter-peripheral communication scheme (e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)). 
     According to an embodiment, commands or data may be transmitted or received between the electronic device  101  and the external electronic device  104  via the server  108  coupled with the second network  199 . Each of the electronic devices  102  or  104  may be a device of a same type as, or a different type, from the electronic device  101 . According to an embodiment, all or some of operations to be executed at the electronic device  101  may be executed at one or more of the external electronic devices  102 ,  104 , or  108 . For example, if the electronic device  101  should perform a function or a service automatically, or in response to a request from a user or another device, the electronic device  101 , instead of, or in addition to, executing the function or the service, may request the one or more external electronic devices to perform at least part of the function or the service. The one or more external electronic devices receiving the request may perform the at least part of the function or the service requested, or an additional function or an additional service related to the request, and transfer an outcome of the performing to the electronic device  101 . The electronic device  101  may provide the outcome, with or without further processing of the outcome, as at least part of a reply to the request. To that end, a cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device  101  may provide ultra low-latency services using, e.g., distributed computing or mobile edge computing. In another embodiment, the external electronic device  104  may include an internet-of-things (IoT) device. The server  108  may be an intelligent server using machine learning and/or a neural network. According to an embodiment, the external electronic device  104  or the server  108  may be included in the second network  199 . The electronic device  101  may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on  5 G communication technology or IoT-related technology. 
       FIGS.  2 A to  2 C  illustrate various states of an electronic device according to various embodiments of the disclosure. 
       FIG.  3 A  illustrates a state in which an electronic device according to an embodiment of the disclosure. 
       FIG.  3 B  is an exploded perspective view of an electronic device according to an embodiment of the disclosure. 
       FIGS.  3 C and  3 D  are cross-sectional views, taken along line A-A, of the electronic device shown in  FIG.  2 A  according to various embodiments of the disclosure. 
     According to various embodiments, the electronic device  200  illustrated in  FIGS.  2 A,  2 C,  3 A, and  3 B  may be one of the electronic devices  101  described with reference to  FIG.  1   . 
     Referring to  FIGS.  2 A to  2 C , the electronic device  200  may be implemented to include a display  230 , an information display region  201 of which is increased or decreased through a sliding operation of the display  230 . The information display region  201  may be a part of a display  230  which is visible to the outside of the electronic device  200 . Information output to the display  230  may be visually transmitted to a user through the information display region  201 . 
     According to various embodiments, the information display region  201  of the electronic device  200  may increase or decrease by a sliding operation thereof. In an embodiment, the sliding operation of the electronic device  200  may refer to sliding of a second housing  220  with respect to a first housing  210 . The second housing  220  may slide in a first direction (e.g., the +X direction in  FIGS.  2 A to  2 C ) or a second direction (e.g., the −X direction in  FIGS.  2 A to  2 C ) opposite to the first direction with respect to the first housing  210 . 
     According to various embodiments, the electronic device  200  may be switched from the reference state (e.g., the state illustrated in  FIG.  2 A ) to a first state (e.g., the state illustrated in  FIG.  2 B ) or a second state (e.g., the state illustrated in  FIG.  2 C ) by the sliding operation. The reference state may refer to a state in which an end of the first housing  210  and an end of the second housing  220  are substantially aligned with each other. For example, as shown in  FIG.  2 A , the reference state may refer to a state in which the second housing  220  protrudes with respect to the first housing  210  or the first housing  210  does not protrude with respect to the second housing  220 . The reference state may refer to a state in which the first housing  210  and the second housing  220  are aligned with each other. The first state may refer to a state in which the second housing  220  has slid in the first direction with respect to the first housing  210  in the reference state. The second state may refer to a state in which the second housing  220  has slid in the second direction with respect to the first housing  210  from the reference state. The information display region (e.g., the information display region  201  of  FIG.  2 C ) in the second state may be smaller than the information display region (e.g., the information display region  201  of  FIG.  2 B ) in the first state. 
     As described above, the display  230  having the information display region  201  variable according to a sliding operation may be defined as a “slidable display”. In addition, the display  230  may include a partial section which is bendable by being guided by a roller (e.g., the roller  410  of  FIG.  4 A ) to be described later. The display  230  including a partial region which is bent by being guided by a roller may be defined as a “rollable display”. The display  230  described below may be understood as a “slidable or rollable display”. 
     According to an embodiment, sliding of the second housing  220  with respect to the first housing  210  may be performed semi-automatically. For example, sliding of the second housing  220  with respect to the first housing  210  may be performed by a member (e.g., the elastic member  630  of  FIG.  6 A ) that provides an elastic force in the sliding direction. In this case, when the sliding of the second housing  220  with respect to the first housing  210  is partially made, the second housing  220  may slide by the elastic force provided to the first housing  210  and/or the second housing  220 . 
     According to an embodiment, sliding of the second housing  220  with respect to the first housing  210  may be performed automatically. For example, the second housing  220  may slide with respect to the first housing  210  by a motor. A motor for sliding the second housing  220  may operate according to a signal input through a sensor and various buttons (e.g., a physical button  242 , a virtual button) included in the electronic device  200 . 
     According to various embodiments, the electronic device  200  may be switched to the reference state (a closed state or a slide-in state) by a sliding operation. For example, the electronic device  200  illustrated in  FIG.  2 A  may be understood to be in the reference state. The reference state may be understood as a state in which the end  220 A of the second housing  220  is substantially aligned with the end  210 A of the first housing  210 . In the reference state, the end  210 A of the first housing  210  and the end  220 A of the second housing  220  may form a boundary of the electronic device  200 . In the reference state, the end  220 A of the second housing  220  may protrude in the first direction with respect to the end  210 A of the first housing  210  or may not be retracted in the second direction. When the second housing  220  slides in the first direction in the reference state, the electronic device  200  may be switched to the first state. When the second housing  220  slides in the second direction in the reference state, the electronic device  200  may be switched to the second state. In the following description, the position of the second housing  220  in the reference state will be defined as a “reference position”. 
     According to various embodiments, when the second housing  220  slides in the second direction in the reference state, as shown in  FIG.  2 C , a hidden region  240  located between the first housing and the second housing may be visually recognized to the outside. For example, a receiving space  241  capable of receiving an external device (e.g., the stylus pen  250 ) and a physical button  242  may be disposed in the hidden region  240 . The receiving space  241  and the physical button  242  included in the hidden region  240  shown in  FIG.  2 C  are merely examples of various components that can be disposed in the hidden region  240 , and various other components may be disposed the hidden region  240 . Various components disposed in the hidden region  240  will be described later. 
     According to various embodiments, the first housing  210  may include at least one sub-housing  211 ,  212 ,  213  and a guide housing  214 . For example, as shown in  FIG.  3 B , the first housing  210  may include a first sub-housing  211 , a second sub-housing  212 , a third sub-housing  213 , and a guide housing  214 . In an embodiment, the receiving space  241  may be disposed in a partial region of the first sub-housing  211 . The receiving space  241  may be a space configured to receive an external device. For example, as shown in  FIG.  3 B , the receiving space  241  may be a space for receiving a pen input device (e.g., a stylus pen). In an embodiment, a receiving space for receiving a part of the display  230  (e.g., the receiving space  430  of  FIG.  4 A ) may be provided between the third sub-housing  213  and the second sub-housing  212 . In an embodiment, a pair of guide housings  214  may be provided in both sides (e.g., the +Y direction and the −Y direction in  FIG.  3 B ) of the electronic device  200  to be coupled to the assembly of the first sub-housing  211 , the second sub-housing  212 , and the third sub-housing  213 . The guide housing  214  may include a guide rail  214 - 1 . The guide rail  214 - 1  may be a groove configured in the guide housing  214  to guide the sliding motion of the second housing  220  and the support member  310 . The protrusions (e.g., the protrusions  221  and  311  of  FIG.  5 A ) disposed on the second housing  220  and the support member  310  may slide while being inserted into the guide rail  214 - 1 , and accordingly, the guide rail  214 - 1  may guide the sliding of the second housing  220  and the support member  310 . 
     According to various embodiments, the second housing  220  may support a part of the display  230 . At least a part of the display  230  may be fixed to the second housing  220 , and when the second housing  220  slides with respect to the first housing  210 , the at least part of the display  230  may move along the second housing  220 . 
     According to various embodiments, the support member  310  may support a part of the display  230 . The support member  310  may include a bendable structure. For example, the support member  310  may include a structure in which a plurality of bars extending in a direction perpendicular (e.g., the Y-axis direction of  FIG.  3 B ) to the sliding direction (e.g., the X-axis direction of  FIG.  3 B ) are connected to one another along the sliding direction. In addition, the support member  310  may be configured in various bendable structures. For example, the support member  310  may be a bendable plate, and may have a structure including a plurality of grooves configured to enable bending. The support member  310  may be connected to the second housing  220  and slide with respect to the first housing  210  together with the second housing  220 . 
     According to various embodiments, the display  230  may be a flexible display  230  that is bendable. In an embodiment, the display  230  may include a flexible substrate. For example, the display  230  may include a substrate formed of a polymer material made of a flexible material such as polyimide (PI) or polyethylene terephthalate (PET). In addition, the display  230  may include a substrate made of a very thin glass material. The display  230  may be supported by the second housing  220  and the support member  310 , and the information display region  201  which is a part that is visible from the outside may increase or decrease through the sliding of the second housing  220  with respect to the first housing  210 . In an embodiment, the display  230  may further include a touch sensing circuit (e.g., a touch sensor). In addition, the display  230  may be coupled to or disposed adjacent to a pressure sensor capable of measuring the intensity (pressure) of a touch and/or a digitizer for detecting a magnetic field-type pen input device (e.g., a stylus pen). For example, the digitizer may include a coil member disposed on a dielectric substrate to detect the electromagnetic inductive resonance frequency applied from the pen input device. 
     According to various embodiments, a rear cover  320  may be coupled to the first housing  210  to configure the rear external appearance of the electronic device  200 . For example, as shown in  FIG.  3 B , the rear cover  320  may be coupled to the first housing  210  in the Z-axis direction of  FIG.  3 B . The rear cover  320  may be formed of a transparent, opaque, or translucent material. 
     According to various embodiments, a fixing device  291  for fixing the external device  250  received in the receiving space  241  to the receiving space  241  may be disposed in the receiving space  241  as shown in  FIG.  3 C . For example, as shown in  FIGS.  3 C and  3 D , the fixing device  291  may be a magnet or a magnetic material  291  coupled to a magnetic material or a magnet  251  included in the external device  250  through magnetic force. 
     According to another embodiment, a receiving identification sensor  292  for detecting whether the external device  250  has been received in the receiving space  241  may be disposed in the receiving space  241 . For example, the receiving identification sensor  292  may be a Hall sensor  292  configured to detect a change in a magnetic field. The Hall sensor  292  may detect whether the external device  250  is received by detecting a magnetic field that changes according to the withdrawal of the external device  250 . 
     In the following description, the same reference numerals are used for the same or similar components as those described in  FIGS.  2 A,  2 B,  3 A, and  3 B , except where otherwise noted. In addition, duplicate descriptions of the above-described components may be omitted if necessary. 
       FIG.  4 A  is a cross-sectional view of the electronic device shown in  FIG.  2 A , taken along line D-D according to an embodiment of the disclosure. 
       FIG.  4 B  is a cross-sectional view of the electronic device shown in  FIG.  2 B , taken along line E-E according to an embodiment of the disclosure. 
       FIG.  4 C  is a cross-sectional view of the electronic device shown in  FIG.  2 C , taken along line F-F according to an embodiment of the disclosure. 
     According to various embodiments, the display  230  may be divided into a plurality of regions. For example, the display  230  may include a first region  230 A, a second region  230 B, and a third region  230 C. The second region  230 B may be a region connected to the first region  230 A, and the third region  230 C may be a region connected to the second region  230 B. The first region  230 A of the display  230  may be a region supported by the second housing  220 , the second region  230 B may be a region supported by a first support part  310 A of the support member  310 , and the third region  230 C may be a region supported by a third support part of the support member  310 . Each divided region of the display  230  is merely for convenience of description, and may be a region which is not visually distinct in effect. 
     According to various embodiments, the second housing  220  may be at the reference position in the reference state as illustrated in  FIG.  4 A . The end  220 A of the second housing  220  may be substantially aligned with the end  210 A of the first housing  210  at the reference position. In this state, the first region  230 A and the second region  230 B of the display  230  may configure the information display region  201 . The information display region  201  may refer to a region of the display  230  visible to the outside of the electronic device  200 . For example, the information display region  201  may be a part excluding a part that is covered by the first housing  210  in the reference state and thus is not visible to the outside of the electronic device  200 . In the reference state, the third region  230 C of the display  230  may be received in a receiving space  430  included in the first housing  210 . 
     According to various embodiments, in the reference state, at least a part of the first support part  310 A of the support member  310  supporting the second region  230 B of the display  230  may be disposed on a first surface  210 - 1  of the first housing  210 . The first surface  210 - 1  of the first housing  210  may refer to a surface facing the second housing  220 . 
     According to various embodiments, when the second housing  220  slides in the first direction (e.g., the +X direction in  FIGS.  4 A to  4 C ) at the reference position, a part of the third region  230 C received in the receiving space  430  may be visible to the outside. The bendable support member  310  may be bent along the roller  410 . The support member  310  connected to the second housing  220  may move by sliding of the second housing  220  in the first direction. As the second support part  310 B of the support member  310  is moved in a direction coming out of the receiving space  430  through the space of a recess  420  between the first housing  210  and the roller  410 , the third region  230 C supported by the second support part  310 B may be visible to the outside of the electronic device  200 . As described above, when the second housing  220  slides in the first direction, at least a part of the first region  230 A, the second region  230 B, and the third region  230 C of the display  230  may form the information display region  201 . 
     According to various embodiments, when the second housing  220  slides in the second direction (e.g., the -X direction in  FIGS.  4 A to  4 C ) at the reference position, a part of the second region  230 B of the display  230  may be received in the receiving space  430 . The support member  310  connected to the second housing  220  may also move by sliding of the second housing  220 . The first support part  310 A of the support member  310  supporting the second region  230 B may be bent along the roller  410  and support the second region  230 B. The second region  230 B may be bent together when the first support part  310 A is bent. As the first support part  310 A of the support member  310  bendable along the roller  410  supports the second region  230 B, a part of the second region  230 B may be received in the receiving space  430  when the second housing  220  slides in the second direction. The second region  230 B may enter the receiving space  430  through the space of the recess  420  between the first housing  210  and the roller  410 . 
     According to various embodiments, when the second housing  220  slides in the second direction at the reference position, the hidden region  240  between the first housing  210  and the second housing  220  may be exposed the outside of the electronic device  200 . When the electronic device  200  is in the reference state or the first state, the hidden region  240  may be covered by the second housing  220  so as not to be visible from the outside. In an embodiment, as shown in  FIG.  4 C , the receiving space  241  may be disposed in the hidden region  240  of the first housing  210 . The external device  250  may be received in the receiving space  241 . 
       FIGS.  5 A and  5 B  illustrate the relationship between a second housing and a guide rail of a support member according to various embodiments of the disclosure. 
       FIG.  5 B  is a cross-sectional view of the electronic device shown in  FIG.  2 A , taken along line B-B. 
     According to various embodiments, guide protrusions  221  and  311  may be disposed on lateral surfaces (or both ends) of the second housing  220  and the support member  310 , respectively. Although one lateral surface of the second housing  220  and the support member  310  is shown in  FIG.  5 A , the guide protrusions  221  and  311  may be configured on the opposite lateral surface as well. The guide protrusions  221  and  311  may be inserted into the guide rail  214 - 1  configured in the guide housing  214 . When the guide protrusions  221  and  311  are inserted into the guide rail  214 - 1 , the guide protrusions  221  and  311  may move along the guide rail  214 - 1 . The second housing  220  and the support member  310  including the guide protrusions  221  and  311  may move along the guide rail  214 - 1 . 
     According to various embodiments, when the second housing  220  and the support member  310  connected to the second housing  220  are moved according to the sliding of the second housing  220  in the first direction or the sliding of the second housing  220  in the second direction, the movement may be guided according to the guide rail  214 - 1  of the guide housing  214 . 
       FIGS.  6 A to  6 D  illustrate an electronic device according to various embodiments of the disclosure. 
       FIG.  6 C  is a cross-sectional view of the electronic device illustrated in  FIG.  6 A , taken along line A-A, and  FIG.  6 D  is a cross-sectional view of the electronic device illustrated in  FIG.  6 B , taken along line B-B. 
     The electronic device  200  described in  FIGS.  6 A to  6 D  is similar to the electronic device  200  described above, but may further include a configuration for fixing the second housing  220  to the reference position, and a configuration for returning the second housing  220  to the reference position. Hereinafter, components that have not been described above will be mainly described. 
     According to various embodiments, an elastic member  630  may be disposed between the first housing  210  and the second housing  220 . For example, as shown in  FIG.  6 A , between the first housing  210  and the second housing  220 , an elastic guide  631  on which an elastic member  630  is disposed may be disposed on the first housing  210 . When a contact part  640  disposed on the second housing  220  is inserted and slides into the elastic guide  631 , the contact part  640  may deform the elastic member  630 . In an embodiment, when the second housing  220  slides in the second direction (e.g., the -X direction in  FIGS.  6 A to  6 D ) at the reference position, the contact part  640  may press the elastic member  630 . The elastic member  630  pressed by the contact part  640  may be elastically deformed. The elastically deformed elastic member  630  may provide an elastic force to the contact part  640  in the first direction (e.g., the +X direction of  FIGS.  6 A to  6 D ). Accordingly, the second housing  220  receives an elastic force in the first direction by the elastically deformed elastic member  630 . When the external force for sliding the second housing  220  in the second direction is removed, the second housing  220  may slide in the first direction by the elastic force provided by the elastic member  630 . 
     As described above, due to the elastic member  630  disposed between the first housing  210  and the second housing  220 , the second housing  220  slid in the second direction at the reference position may automatically slide again in the first direction when the external force for sliding the second housing  220  in the second direction is removed. When the second housing  220  slid in the second direction slides in the first direction, the second housing  220  may be aligned at the reference position. For example, the second housing  220  may be stopped at the reference position by the structure of the first protrusion  610 -the second protrusion  620  to be described below. 
     According to various embodiments, the first protrusion  610  may be disposed on the first housing  210 , and the second protrusion  620  may be disposed on the second housing  220 . For example, the first protrusion  610  may be disposed on a guide housing  214  of the first housing  210 . The second protrusion  620  may be disposed on each of the opposite lateral surfaces (e.g., the +Y direction and −Y direction in  FIGS.  6 A to  6 D ) of the second housing  220  perpendicular to the sliding direction (e.g., the X-axis direction of  FIGS.  6 A to  6 D ) of the second housing  220 , and the first protrusion  610  of the first housing  210  may also be disposed on the first housing  210  at a position corresponding to the second protrusion  620 . 
     In an embodiment, when the second housing  220  is at the reference position, the second protrusion  620  may be caught by the first protrusion  610 . The second housing  220  may stop with respect to the first housing  210  in a state in which the second protrusion  620  is caught by the first protrusion  610 . In this state, the second protrusion  620  may be maintained in a state where the same is caught by the first protrusion  610  until an external force of a certain level or more is applied to the second housing  220 . The second housing  220  may be aligned at the reference position by the structure of the first protrusion  610  and the second protrusion  620  described above. 
     According to various embodiments, at least one of the second protrusion  620  or the first protrusion  610  may be drawn out with respect to the first housing  210  or the second housing  220  in the protruding direction (e.g., the Y-axis direction in  FIGS.  6 A and  6 B ). For example, when an external force of a certain level or more is applied to the second housing  220 , the second protrusion  620  or the first protrusion  610  may be introduced into the first housing  210  or the second housing  220 , and thus the fixing structure of the second protrusion  620  and the first protrusion  610  may be released. 
     One lateral surface (e.g., the lateral surface in the +Y direction in  FIGS.  6 A and  6 B ) of the electronic device  200  has been described in the above drawings, but the other lateral surface (e.g., the lateral surface in the −Y direction in  FIGS.  6 A and  6 B ) of the electronic device  200  may also include the structure described above. 
       FIG.  7    is a block diagram of an electronic device according to an embodiment of the disclosure. 
     According to various embodiments, the electronic device may include a display  230 , a displacement sensor  720 , a receiving identification sensor  710 , and a processor  701  (e.g., the processor  120  of  FIG.  1   ). 
     According to various embodiments, the displacement sensor  720  may be a sensor configured to detect movement or sliding displacement of the second housing  220  with respect to the first housing  210 . Since the information display region  201  of the display  230  increases or decreases according to the sliding of the second housing  220 , the displacement sensor  720  may detect the increase or decrease of the information display region  201  of the display  230 . In an embodiment, the displacement sensor  720  may be a sensor configured to generate a signal according to the sliding of the second housing  220  with respect to the first housing  210 . For example, the displacement sensor  720  may be a sensor such as a linear scale that generates a signal according to the mechanical movement of the second housing  220  or a Hall sensor that detects a change in a magnetic field. In case that the displacement sensor  720  is a Hall sensor, a magnetic material may be disposed in the second housing  220  or the first housing  210  so that a magnetic field is changed according to the sliding of the second housing  220 , and the Hall sensor may be disposed at a position corresponding to a magnetic material. 
     According to various embodiments, the receiving identification sensor  710  (e.g., the receiving identification sensor  292  of  FIG.  3 D ) may be a sensor for detecting whether an external device received in the receiving space  241  configured in the hidden region  240  is received. For example, the receiving identification sensor  710  may be a Hall sensor that detects a change in a magnetic field. When the external device is received, a change in the magnetic field around the receiving space may occur, and the receiving identification sensor  710  may detect the change. 
     According to various embodiments, the processor  701  may control various electronic components included in the electronic device so that the electronic device can perform various operations. The processor  701  may perform various operations by processing information according to a specific signal or input. Here, the operation performed by the processor  701  may include various functions or commands (e.g., content playback, application execution, camera driving, information display through the display  230 , etc.) that may be performed through various electronic components included in the electronic device. 
     The processor  701 , the displacement sensor  720 , and the receiving identification sensor  710  to be mentioned below will use the reference numerals of  FIG.  7   . 
       FIG.  8 A  is a flowchart of operations of an electronic device according to an embodiment of the disclosure. 
       FIG.  8 B  illustrates one of the operations of an electronic device according to an embodiment of the disclosure. 
     According to various embodiments, the displacement sensor  720  may generate a first signal at operation  812  when the second housing  220  slides in the first direction at operation  811  at the reference position. In addition, the displacement sensor  720  may generate a second signal at operation  822  when the second housing  220  slides in the second direction at operation  821  at the reference position. The first signal and the second signal may be distinguishable from each other. 
     According to various embodiments, the processor  701  may perform various operations according to a signal generated by the displacement sensor  720 . In an embodiment, the processor  701  may receive a first signal generated by the displacement sensor  720  to perform a first operation at operation  813 , and receive a second signal to perform a second operation at operation  823 . The first operation and the second operation may be different operations. The first operation and the second operation may be an operation configured when the electronic device is manufactured or an operation arbitrarily designated by a user. In addition, the first operation and the second operation may differ depending on an application executed in the electronic device. For example, the first operation and the second operation may be operations of executing a specific application (a camera-related application, an audio-related application, a content reproduction application, an Internet browsing application, etc.). In addition, the first operation and the second operation may be an operation of performing various functions (e.g., driving a camera, playing audio, playing content, activating a flash, activating wireless communication, changing a sound mode, etc.) of the electronic device. The above-described operation is merely an example, and in addition, the first operation and the second operation may be various operations within the range that those skilled in the art can understand. 
     In an embodiment, the first operation and the second operation may correspond to each other. For example, as shown in  FIG.  8 B , while the content  800  playback application is being executed, the first operation may be a command instructing the fast forward  801  playback. When the fast forward is performed, the next scene  800 A of the currently displayed content  800  may be displayed. The second operation may be a command instructing the rewind  802  playback. When the rewind is performed, the previous scene  800 B of the currently displayed content  800  may be displayed. 
     In another embodiment, while the content playback application is being executed, the first operation may be a command instructing to reproduce the next content, and the second operation may be a command instructing to reproduce the previous content. In addition, while a camera-related application is being executed, the first operation may be a command instructing photographing through a front camera, and the second operation may be a command instructing photographing through a rear camera. In addition, while the Internet browsing application is being executed, the first operation may be a command for forward, and the second operation may be a command for rewind. In addition, while a cursor is being displayed on the screen, the first operation may be a command for moving the cursor forward, and the second operation may be a command for moving the cursor backward. 
     According to various embodiments, the displacement sensor  720  may generate a third signal at operation  832  when the second housing  220  slides in the second direction to be in the second state (e.g., the state illustrated in  FIG.  2 C ) at operation  831 . The processor  701  may receive a third signal and perform a third operation at operation  833  distinguished from the first operation and the second operation. 
     In an embodiment, the displacement sensor  720  may generate a different signal according to the movement speed of the second housing  220 . For example, the displacement sensor  720  may generate a first movement signal in case that the movement speed of the second housing  220  is equal to or less than a preconfigured movement speed, and may generate a second movement signal in case that the movement speed of the second housing  220  is greater than the preconfigured movement speed. The processor  701  may perform different operations according to the first movement signal and the second movement signal. It has been described that the first operation and the second operation are performed based on the movement of the second housing  220  in a specific direction (e.g., a first direction (e.g., the +X direction in  FIG.  2 A ) or a second direction (e.g., the -X direction in  FIG.  2 B )). When the displacement sensor  720  generates a signal that is different according to the movement speed of the second housing  220 , the processor  701  may perform an operation different according to the fast or slow movement in the first direction, and the processor  701  may perform an operation different according to the fast or slow movement in the second direction. 
       FIGS.  9 A and  9 B  illustrate examples of an external device received in a hidden region according to various embodiments of the disclosure. 
       FIG.  9 C  is a flowchart showing operations of an electronic device including a hidden region according to an embodiment of the disclosure. 
     Referring to  FIGS.  9 A and  9 B , when the second housing  220  slides in the second direction (e.g., the −X direction of  FIGS.  9 A and  9 B ), the hidden region  240  may be exposed to the outside, and the receiving space  241  configured in the hidden region  240  may be exposed to the outside. Various types of external devices may be received in the receiving space  241 . 
     In an embodiment, the processor  701  may perform an operation preconfigured according to the type of an external device received in the receiving space  241 , based on at least one of the second signal and the third signal. Here, the second signal and the third signal may be signals generated by the displacement sensor  720  described with reference to  FIGS.  7  and  8 A . The second signal may be a signal generated by the displacement sensor  720  when the second housing  220  slides in the second direction, and the third signal may be a signal generated by the displacement sensor  720  when the second housing  220  slides in the second direction to be in the second state. 
     For example, in case that the external device received in the receiving space  241  is a pen input device (e.g., the stylus pen  250 ), the processor  701  may perform an operation of executing an application  901  related to the pen input device (e.g., a writing application, a memo application, etc.), based on at least one of the second signal and the third signal. 
     As another example, in case that the external device received in the receiving space  241  is a storage device (e.g., micro SD or mini SD)  910 , the processor  701  may perform an operation of executing an application  902  related to the storage device (e.g., a navigator application, a file management application, a content playback application, etc.), based on at least one of the second signal and the third signal. 
     As still another example, in case that the external device received in the receiving space  241  is a subscriber identification module (SIM) card, the processor  701  may perform an operation of executing an application related to the SIM card (e.g., a communication state configurating application, etc.), based on at least one of the second signal and the third signal. 
     In an embodiment, the processor  701  may perform an operation related to the external device according to whether the external device is received in the receiving space  241  from the receiving identification sensor  710 . For example, in case that the external device is a pen input device  250 , as the pen input device  250  is removed from the receiving space  241 , an operation of executing the application  901  related to the pen input device  250  may be performed. 
     According to various embodiments, the processor  701  may identify the sliding state of the second housing  220 . For example, the processor  701  may identify the second signal or the third signal to identify the sliding state at operation  931 . In an embodiment, the processor  701  may identify the sliding state to identify whether the hidden region  240  is exposed to the outside and the receiving space  241  configured in the hidden region  240  is exposed to the outside. In a state in which the receiving space  241  is exposed to the outside, the processor  701  may identify states of various external devices at operation  932  received in the receiving space  241 . Here, the state of the external device may include various states related to the operation of the external device, such as whether the external device is received in the receiving space  241 , a charging state of the external device, and whether the external device operates normally. The processor  701  may identify the state of the external device to control (e.g., execute or terminate) the operation of the application related to the external device at operation  933 . For example, in case that the external device is the pen input device  250 , the processor  701  may identify whether the pen input device  250  is removed from the receiving space  241 , and execute the application  901  related to the pen input device  250  (e.g., a writing application, a memo application) when the pen input device  250  is removed. The processor  701  may identify that the pen input device  250  is received in the receiving space  241 , to terminate the application related to the pen input device  250 . As another example, in case that the external device is the storage device  910 , the processor  701  may identify that the storage device  910  has been received, to execute the application  902  related to the storage device (e.g., an explorer application, a file management application, a content playback application, etc.). The processor  701  may identify that the storage device  910 has been removed, to terminate the application related to the storage device. 
     The above-described embodiments are merely examples, and various other external devices may be received in the receiving space  241 . In an embodiment, the external device may be electrically connected to the electronic device while being received in the receiving space  241 . In this case, the processor  701  may identify the type of the external device by identifying the ID of the external device. The processor  701  may perform an operation preconfigured according to the second signal and the third signal, based on the type of the external device. 
       FIGS.  10 A to  10 F  illustrate an operation of an electronic device according to an input/output device disposed in a hidden region according to various embodiments of the disclosure. 
     According to various embodiments, an input/output device may be disposed in the hidden region  240 . The input/output device may refer to any type of device that inputs a specific signal or information to an electronic device or outputs a specific signal and information received from the electronic device. For example, the input/output device may include an audio device, a camera, a connector, a physical button, a virtual button, an auxiliary display, and the like. 
     In an embodiment, the input/output device may be an audio device. Referring to  FIG.  10 A , a speaker  1010  may be disposed in the hidden region  240 . Since the entire part of the hidden region  240  may be used as an output part, the speaker  1010  disposed in the hidden region  240  may have better performance than a speaker disposed in another region of the electronic device. The processor  701  may perform an operation of executing an application  1001  related to the audio device  1010  (e.g., a content reproduction application), based on at least one of the second signal and the third signal. In another embodiment, the processor  701  may change the sound output path so that the sound is output through the speaker  1010  disposed in the hidden region  240 , based on at least one of the second signal and the third signal. In this case, the sound having been output through the speaker or earphone device disposed in another part of the electronic device may be output through the speaker disposed in the hidden region  240 . 
     In one embodiment, the input/output device may be an auxiliary display. Referring to  FIGS.  10 B and  10 C , the auxiliary display  1020  may be a display capable of displaying various types of information. The auxiliary display  1020  may be disposed on at least a part of the hidden region  240 . The processor  701  may display information  1021  related to the information  1002  displayed on the display  230  on the auxiliary display  1020 , based on at least one of the second signal and the third signal. For example, in case that a notification  1002  is displayed on the display, details  1021  of the notification may be displayed on the auxiliary display  1020  when the auxiliary display  1020  is exposed by the sliding of the second housing  220  in the second direction. As another example, in case that an authentication key (e.g., on time password) is requested from the running application  1003 , the authentication key  1022  may be displayed on the auxiliary display  1020  when the auxiliary display  1020  is exposed by the sliding of the second housing  220  in the second direction. In an embodiment, the auxiliary display  1020  may be an e-paper display (EPD). 
     In an embodiment, the electronic device may include an authentication device (not shown) for identifying a user. The authentication device may include a device capable of recognizing various means (e.g., a password, a pattern, biometric information (e.g., fingerprint, face, iris, etc.)) for identifying a user. For example, the authentication device may include a touch sensor capable of receiving a password or a pattern, and a biometric sensor capable of identifying biometric information. The authentication device may identify a specific user and may generate an authentication signal when identification of the specific user is completed. The processor  701  may receive the authentication signal and control the input/output device disposed in the hidden region  240 . For example, as described above, when the auxiliary display is disposed in the hidden region  240  and the authentication key is displayed, the processor  701  may control the auxiliary display, based on the reception of the authentication signal. This may block an unauthorized user from accessing the authentication key displayed on the auxiliary display. 
     In an embodiment, the electronic device may further include a locking device (not shown) for blocking sliding of the second housing with respect to the first housing. The locking device may include any of various mechanical means capable of blocking the sliding of the second housing. For example, the locking device may be a catch installed on a sliding path of the second housing. The processor  701  may release the locking device, based on the authentication signal generated by the authentication device. This may block an unauthorized user from accessing the hidden region  240 . 
     In an embodiment, the input/output device may be a camera. Referring to  FIG.  10 D , a camera  1040  may be disposed in the hidden region  240 . The processor  701  may perform an operation of executing an application  1004  related to the camera  1040 , based on at least one of the second signal and the third signal. At this time, the processor  701  may output an image captured by the camera  1040  disposed in the hidden region  240  as a preview screen such that shooting can be immediately performed by the camera  1040  disposed in the hidden region  240 . 
     In an embodiment, the input/output device may be a button. The button may include a physical button or a virtual button. Referring to  FIG.  10 E , a button  1050  may be disposed in the hidden region  240 . The processor  701  may perform various operations mapped to the button  1050  according to an input received through the button  1050  disposed in the hidden region  240 . 
     In one embodiment, the input/output device may be a connector. Referring to  FIG.  10 F , a connector  1060  may be disposed in the hidden region  240 . The electronic device may be connected to an external electronic device by wire through the connector  1060 . The connector  1060  may be, for example, a USB-C type connector  1060  as shown in  FIG.  10 F . The shape of the connector  1060  may be changed into various shapes according to standard technology in the connector field. 
     An electronic device (e.g., the electronic device  101  of  FIG.  1   , the electronic device  200  of  FIGS.  2 A to  2 C ) according to various embodiments disclosed herein may include a first housing (e.g., the first housing  210  of  FIG.  2 A ), a second housing (e.g., the second housing  220  of  FIG.  2 A ) slidably coupled with respect to the first housing, a display (e.g., the display  230  of  FIG.  2 A ) at least partially fixed to the second housing and including an information display region (e.g., the information display region  201  of  FIG.  2 A ) increasing or decreasing according to the sliding of the second housing, the information display region being a part of the electronic device visible to the outside, and a support member (e.g., the support member  310  of  FIG.  3 B ) including a bendable structure and configured to support at least a part of the display and move according to the sliding of the second housing, wherein the display is configured such that the information display region increases in case that the second housing slides in a first direction at a reference position at which the end of the second housing and the end of the first housing are substantially aligned with each other, and the information display region decreases in case that the second housing slides in a second direction opposite to the first direction at the reference position. 
     The display may include a first region (e.g., the first region  230 A of  FIG.  4 A ), a second region connected to the first region (e.g., the second region  230 B of  FIG.  4 A ), and a third region (e.g., the third region  230 C of  FIG.  4 A ) connected to the second region wherein, in case that the second housing is at the reference position, the first region and the second region form the information display region, and the third region is received in a receiving space (e.g., the receiving space  430  of  FIG.  4 A ) included in the first housing. 
     In the display, in case that the second housing slides in the first direction at the reference position, at least a part of the first region, the second region, and the third region may form the information display region. 
     In the display, in case that the second housing slides in the second direction at the reference position, at least a part of the second region may be received in the receiving space of the first housing. 
     The first housing may include a guide housing (e.g., the guide housing  214  of  FIG.  5 B ) including a guide rail (e.g., the guide rail  214 - 1  of  FIG.  5 B ) configured to guide the movement of the support member and the second housing. 
     The support member may include a first support part (e.g., the first support part  310 A of  FIG.  4 A ) configured to support the second region of the display, and a second support part (e.g., the second support part  310 B of  FIG.  4 A ) configured to support the third region, and the second housing may support the first region of the display. 
     The first support part of the support member may be positioned on a first surface of the first housing facing the second housing in case that the second housing is at the reference position. 
     The electronic device may further include a first protrusion (e.g., the first protrusion  610  of  FIG.  6 A ) disposed on the first housing and a second protrusion (e.g., the second protrusion  620  of  FIG.  6 A ) disposed on the second housing, wherein, in case that the second housing is at the reference position, the second protrusion may be caught by the first protrusion so that the second housing is stopped at the reference position. 
     The electronic device may further include an elastic member (e.g., the elastic member  630  of  FIG.  6 A ) disposed between the first housing and the second housing, wherein, in case that the second housing slides in the second direction at the reference position, the elastic member is configured to provide an elastic force in a direction in which the second housing slides in the first direction. 
     The electronic device may further include a displacement sensor (e.g., the displacement sensor  720  of  FIG.  7   ) configured to detect a sliding displacement of the second housing with respect to the first housing. 
     The electronic device may further include a hidden region (e.g., the hidden region  240  of  FIG.  2 C ) positioned between the second housing and the first housing and exposed to the outside of the electronic device according to the sliding of the second housing in the second direction at the reference position. 
     The electronic device may further include a receiving space (e.g., the receiving space of  FIG.  2 C ) disposed in the hidden region of the first housing. 
     The receiving space may be configured to receive an external electronic device, and may further include a receiving identification sensor (e.g., the receiving identification sensor  292  of  FIG.  3 D ) configured to identify whether the external electronic device received in the receiving space is received. 
     The electronic device may further include an input/output device disposed in the hidden region. 
     The input/output device may be at least one of an auxiliary display, an audio device, a camera, a connector, a physical button, and a virtual button. 
     An electronic device (e.g., the electronic device  101  of  FIG.  1   , the electronic device  200  of  FIGS.  2 A to  2 C ) according to various embodiments disclosed herein may include a first housing (e.g., the first housing  210  of  FIG.  2 A ), a second housing (e.g., the second housing  220  of  FIG.  2 A ) slidably coupled with respect to the first housing, a display (e.g., the display  230  of  FIG.  2 A ) at least partially fixed to the second housing and including an information display region (e.g., the information display region  201  of  FIG.  2 A ) increasing or decreasing according to the sliding of the second housing, the information display region being a part of the electronic device visible to the outside, a support member (e.g., the support member  310  of  FIG.  3 B ) including a bendable structure and configured to support at least a part of the display and move according to the sliding of the second housing, and a hidden region (e.g., the hidden region  240  of  FIG.  2 C ) positioned between the second housing and the first housing and exposed to the outside of the electronic device by the sliding of the second housing with respect to the first housing. 
     The electronic device may further include a receiving space (e.g., the receiving space of  FIG.  2 C ) disposed in the hidden region of the first housing. 
     The receiving space may be configured to receive an external device, and may further include a receiving identification sensor (e.g., the receiving identification sensor  292  of  FIG.  3 D ) configured to identify whether the external device received in the receiving space is received. 
     The electronic device may further include an input/output device disposed in the hidden region. 
     The input/output device may be at least one of an auxiliary display, a speaker, a camera, a connector, a physical button, and a virtual button. 
     While the disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents.