Patent Description:
Due to the development of information and communication technology and semiconductor technology, various functions are being integrated into a single portable electronic device. For example, an electronic device may implement various functions, such as an entertainment function (e.g., a game function), a multimedia function (e.g., a music/video replay function), a communication and security function for mobile banking or the like, a schedule management function, and an e-wallet function, in addition to a communication function. Such an electronic device has been downsized to be conveniently carried by a user.

A flexible display has a screen that may be curved or flattened by winding, folding, or bending a panel. The flexible display may be implemented as a rollable display, a bendable display, a foldable display, a slidable display, or the like. An electronic device including such a flexible display may be applied not only to a mobile device such as a smartphone or a tablet PC, but also to a TV, an automobile display, a wearable device, or the like, and its application fields are expanding.

An electronic device (e.g., a portable terminal) includes a display having a flat surface or a display having a flat surface and a curved surface. An electronic device including a display may have a limitation in implementing a screen larger than the size of the electronic device due to a fixed display structure. Therefore, foldable or rollable electronic devices are being researched.

In implementing a rollable electronic device, as housings of the electronic device become movable (e.g., slidable) relative to each other and a flexible display becomes slidable, the flexible display may include a rolling section and a flat section. This is exemplified by <CIT>.

According to various embodiments of the disclosure, in a flexible display, a glass substrate or a high-hardness substrate may be replaced with a flexible film that is foldable/unfoldable. By using the film as the substrate, the flexible display is advantageous in that it is thin, light, strong against impact, and foldable/unfoldable. The flexible display has a structure in which a film is stacked on a display. In particular, as the use environment, auxiliary environment, manufacturing environment, and the like of the flexible display become more diverse and harsher, a film having an excellent recovery characteristic and maintaining a viscoelastic property in a wide temperature range is required.

In implementing a slidable electronic device capable of performing a sliding motion, it is necessary to control the sliding motion depending on a specific condition encountered by the flexible display.

The flexible display may form a curved surface or a flat surface in a rolling section and a flat section, and its shape may change frequently while sliding. At this time, physical properties of the flexible display may be affected by the surrounding environment.

In the slidable electronic device according to the disclosure, it may be necessary to control the motor output according to a specific condition in order to provide a stable sliding motion.

According to various embodiments of the disclosure, it is possible to provide an electronic device in which a sliding motion is provided in consideration of the repulsive force of a flexible display.

According to various embodiments of the disclosure, it is possible to provide an electronic device including a motor that is controlled according to a specific condition considering the environment around the electronic device or the flexible display.

According to various embodiments of the disclosure, an electronic device includes housings including a first housing and a second housing configured to accommodate at least a portion of the first housing and guide a sliding movement of the first housing, a flexible display including a first display area connected to the first housing and a second display area extending from the first display area, a roller disposed inside the second housing and configured to move the flexible display, a motor configured to rotate the roller, and a support member configured to support at least a portion of the flexible display in the second display area. The motor is configured such that an output of the motor is determined according to the one-state holding time of the flexible display in an opened state or a closed state of the electronic device. Also disclosed are circumstances where the motor is configured such that an output of the motor is determined according additionally or alternatively to at least one of the shape change and the temperature.

According to various embodiments, in the electronic device, the second display area may include a (<NUM>-<NUM>)th area in which the flexible display is capable of forming a curved surface with the roller, and a (<NUM>-<NUM>)th area which is connected to the (<NUM>-<NUM>)th area and in which the flexible display forms a flat surface, the (<NUM>-<NUM>)th area may be flattened by the opening or closing movement of the flexible display, and the (<NUM>-<NUM>)th area may form a curved surface by the opening movement of the flexible display.

The slidable electronic device according to various embodiments of the disclosure is capable of continuously increasing an output of a motor according to a specific condition of the flexible display.

The slidable electronic device according to various embodiments of the disclosure is capable of allowing the flexible display to move at a constant speed by controlling the motor output when the flexible display moves.

The slidable electronic device according to various embodiments of the disclosure is capable of controlling the motor output in consideration of the repulsive force or stress of the flexible display when the flexible display moves under a specific condition.

The electronic device according to various embodiments of the disclosure may be one of various types of electronic devices.

It should be appreciated that 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. 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 in connection with various embodiments of the disclosure, 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".

According to various embodiments, one or more of the above-described components or operations may be omitted, or one or more other components or operations may be added. In such a case, 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.

<FIG> is a view illustrating a state in which a second display area of a flexible display according to various embodiments of the disclosure is accommodated in a second housing.

<FIG> is a view illustrating a state in which the second display area of the flexible display according to various embodiments of the disclosure is exposed to the outside of the second housing.

The state illustrated in <FIG> is defined as the state in which the first housing <NUM> is closed relative to the second housing <NUM>, and the state illustrated in <FIG> is defined as the state in which the first housing <NUM> is opened relative to the second housing <NUM>. According to an embodiment, the "closed state" or the "opened state" is defined as the state in which the electronic device is closed or the state in which the electronic device is opened.

Referring to <FIG> and <FIG>, an electronic device <NUM> includes housings <NUM> and <NUM> and a flexible display <NUM> (hereinafter, referred to as a "display"). The housings <NUM> and <NUM> include a second housing <NUM> and a first housing <NUM> disposed to be movable relative to the second housing <NUM>. In some embodiments, the electronic device <NUM> may be interpreted as having a structure in which the second housing <NUM> is disposed to be slidable on the first housing <NUM>. According to an embodiment, the first housing <NUM> may be disposed to be reciprocable by a predetermined distance in the illustrated direction, for example, a first direction (e.g., the X-axis direction) relative to the second housing <NUM>.

According to various embodiments, the first housing <NUM> may be referred to as, for example, a first structure, a slide structure, a slide bracket, or a slide housing and may be configured to be reciprocable relative to the second housing <NUM>. According to an embodiment, the second housing <NUM> may be referred to as, for example, a second structure, a main structure, a base bracket, or a main housing. A portion of the display <NUM> (e.g., a first display area A1) may be disposed on the first housing <NUM>. According to an embodiment, the second housing <NUM> may accommodate various electrical and electronic components such as a circuit board and a battery.

According to an embodiment, when the first housing <NUM> moves (e.g., slides) relative to the second housing <NUM>, another portion of the display <NUM> (e.g., a second display area A2) is at least partially accommodated inside the second housing <NUM> (e.g., a slide-in operation) or visually exposed outside the second housing <NUM> (e.g., a slide-out operation).

According to various embodiments, the first housing <NUM> may include a front surface (e.g., the front surface F1 in <FIG>) facing at least a portion of the display <NUM> and a rear surface F2 facing a direction opposite to the front surface F1. According to an embodiment, the first housing <NUM> supports at least a portion of the display <NUM> (e.g., the first display area A1).

According to various embodiments, the second housing <NUM> may include a rear surface plate <NUM>. According to an embodiment, the rear surface plate <NUM> may substantially define at least a portion of the exterior of the second housing <NUM> or the electronic device <NUM>. According to an embodiment, the rear surface plate <NUM> may provide a decorative effect on the exterior of the electronic device <NUM>. The rear surface plate <NUM> may be made of at least one of metal, glass, synthetic resin, or ceramic. According to an embodiment, at least a portion of the rear surface plate <NUM> (e.g., an auxiliary display area) may be made of a material that transmits light. For example, in the state in which a portion of the display <NUM> (e.g., the second display area A2) is accommodated inside the electronic device <NUM>, the electronic device <NUM> may output visual information by using the second display area A2. The auxiliary display area may be a portion of the rear surface plate <NUM> in which the display <NUM> accommodated inside the second housing <NUM> is located.

According to various embodiments, the second housing <NUM> may include side surface members 126a and 126b. The side surface members 126a and 126b may include a first side surface member 126a and a second side surface member 126b substantially parallel to the first side surface member 126a. According to an embodiment, the first side surface member 126a and the second side surface member 126b may define at least a portion of the exterior of the electronic device <NUM>. According to an embodiment, the side surface members 126a and 126b may include at least one speaker hole 145a or microphone hole 147a or 147b.

According to various embodiments, the second housing <NUM> accommodates the first housing <NUM>. For example, the first housing <NUM> may be accommodated in the second housing <NUM> while being at least partially surrounded by the rear surface plate <NUM>, the first side surface member 126a, and the second side surface member 126b and may slide in a direction parallel to the first surface F1 or the second surface F2, for example, in the first direction (e.g., the X-axis direction) while being guided by the second housing <NUM>.

According to various embodiments, the display <NUM> includes a first display area A1 and a second display area A2. According to an embodiment, the first display area A1 is disposed on the first housing <NUM>. For example, the first display area A1 may be disposed on the front surface F1 of the first housing <NUM>. The second display area A2 extends from the first display area A1 and is inserted into or accommodated inside the second housing <NUM> or is exposed outside the second housing <NUM> according to a sliding movement of the first housing <NUM>.

According to various embodiments, the second display area A2 is moved while substantially being guided by a roller (e.g., the first roller <NUM> in <FIG>) mounted in the second housing <NUM> to be accommodated inside or exposed outside the second housing <NUM>. According to an embodiment, the second display area A2 may be moved based on the sliding movement of the first housing <NUM> in the first direction (e.g., the direction indicated by arrow ①). For example, while the first housing <NUM> slides, a portion of the second display area A2 may be deformed into a curved shape at a position corresponding to the first roller <NUM>.

According to various embodiments, when viewed from above the first housing <NUM> (e.g., in the Z-axis direction), if the first housing <NUM> moves from the closed state to the opened state, the second display area A2 may form a substantially flat surface with the first display area A1 while being gradually exposed outside the second housing <NUM>. The display <NUM> may be coupled to or disposed adjacent to a touch detection circuit, a pressure sensor capable of measuring a touch intensity (pressure), and/or a digitizer configured to detect a magnetic field-type stylus pen. In an embodiment, the second display area A2 is at least partially accommodated inside the second housing <NUM>, and even in the state illustrated in <FIG> (e.g., the closed state), a portion of the second display area A2 is visually exposed outside. According to an embodiment, irrespective of the closed state or the opened state, a portion of the visually exposed second display area A2 may be located on the roller (e.g., the first roller <NUM> in <FIG>), and at a position corresponding to the first roller <NUM>, a portion of the second display area A2 may maintain the curved shape.

According to various embodiments, the electronic device <NUM> may include a key input device <NUM>, a connector hole <NUM>, audio modules 145a, 145b, 147a, and 147b, or a camera module <NUM>. Although not illustrated, the electronic device <NUM> may further include an indicator (e.g., an LED device) or various sensor modules.

According to various embodiments, the key input devices <NUM> may be disposed on the outer surface of the second housing <NUM>. For example, the key input device <NUM> may be disposed on the first side surface member 126a or the second cover member 126b. The electronic device <NUM> may be designed such that, according to the exterior and use state, the illustrated key input device <NUM> is omitted or an additional key input device(s) is(are) included. According to an embodiment, the electronic device <NUM> may include key input devices (not illustrated), such as a home key button or touch pads disposed around the home key button. According to another embodiment, at least a portion of the key input device <NUM> may be located in an area of the first housing <NUM>.

According to various embodiments, the connector hole <NUM> may be omitted in some embodiments and may accommodate a connector (e.g., a USB connector) for transmitting/receiving power and/or data to/from an external electronic device. Although not illustrated, the electronic device <NUM> may include a plurality of connector holes <NUM>, and some of the connector holes <NUM> may function as connector holes for transmitting/receiving audio signals to/from an external electronic device. In the illustrated embodiment, the connector hole <NUM> is disposed in the second side wall 126b, but the disclosure is not limited thereto. The connector hole <NUM> or a connector hole (not illustrated) may be disposed in the first side wall 126a.

According to various embodiments, the audio modules 145a, 145b, 147a, and 147b may include speaker holes 145a and 145b or microphone holes 147a and 147b. One of the speaker holes 145a and 145b may be provided as a receiver hole for a voice call, and another one may be provided as an external speaker hole. The electronic device <NUM> may include a microphone configured to acquire sound, and the microphone may acquire sound outside the electronic device <NUM> through the microphone holes 147a and 147b. According to an embodiment, the electronic device <NUM> may include a plurality of microphones in order to detect the direction of sound. According to an embodiment, the speaker holes 145a and 145b and the microphone holes 147a and 147b may be implemented as a single hole, or a speaker may be included without the speaker holes 145a and 145b (e.g., a piezo speaker). According to an embodiment, the speaker hole indicated by reference numeral "145b" may be disposed in the first housing <NUM> to be used as a receiver hole for voice call, and the speaker hole (e.g., an external speaker hole) indicated by reference numeral "145a" or the microphone holes 147a and 147b may be disposed on the first side surface member 126a and/or the second side surface member 126b of the second housing <NUM>.

According to various embodiments, the camera module <NUM> may be located in the second housing <NUM> and may photograph a subject in a direction opposite to the first display area A1 of the display <NUM>. The electronic device <NUM> may include a plurality of camera modules <NUM>. For example, the electronic device <NUM> may include at least one of a wide-angle camera, a telephoto camera, and a close-up camera. In some embodiments, the electronic device <NUM> may include an infrared projector and/or an infrared receiver to measure the distance to a subject. The camera module <NUM> may include one or more lenses, an image sensor, and/or an image signal processor. Although not illustrated, the electronic device <NUM> may further include another camera module (e.g., a front camera) configured to photograph a subject from a direction opposite to the camera module <NUM> with respect to the display <NUM>. For example, the front camera may be disposed in an area around the first display area A1 or an area overlapping the display <NUM>, and when disposed in the area overlapping the display <NUM>, the front camera may photograph a subject through the display <NUM>.

According to various embodiments, an indicator (not illustrated) of the electronic device <NUM> may be disposed on the first housing <NUM> or the second housing <NUM> and may include a light-emitting diode to provide state information of the electronic device <NUM> as a visual signal. A sensor module (not illustrated) of the electronic device <NUM> may generate an electrical signal or a data value corresponding to an internal operating state of the electronic device <NUM> or an external environmental state. 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 an HRM sensor). In another embodiment, the sensor module may further include at least one of, for example, 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> is an exploded perspective view of an electronic device according to various embodiments of the disclosure. <FIG> is a cross-sectional view taken along line A-A' in <FIG>.

Referring to <FIG> and <FIG>, the electronic device <NUM> may include a first housing <NUM>, a second housing <NUM>, a display <NUM>, and a display support member <NUM> configured to support at least a portion of the display <NUM>. The configurations of the first housing <NUM>, the second housing <NUM>, and the display <NUM> of <FIG> may be wholly or partly the same as those of the first housing <NUM>, the second housing <NUM>, and the display <NUM> of <FIG> and <FIG>.

According to various embodiments, the first housing <NUM> may support a portion of the display <NUM>. For example, the first housing <NUM> may include a front surface F1 facing a portion of the display <NUM> (e.g., the first display area A1).

According to various embodiments, the second housing <NUM> may include a base bracket <NUM>. According to an embodiment, the base bracket <NUM> may accommodate components of the electronic device <NUM> (e.g., the battery <NUM> and the printed circuit board <NUM>).

According to various embodiments, the second housing <NUM> may include at least one accommodation groove 122a. According to an embodiment, the accommodation groove 122a may accommodate a portion of the display support member <NUM> and may guide a sliding movement of the display support member <NUM>. According to an embodiment, the accommodation groove 122a may be provided in the base bracket <NUM>. For example, the accommodation groove 122a may be provided in the front surface 122b and the side surface 122c of the base bracket <NUM>.

According to various embodiments, the electronic device <NUM> may include guide members <NUM>. According to an embodiment, the second housing <NUM> may include a first guide member 128a connected to the first side wall member 126b and a second guide member 128b connected to the second side wall member 126b. The first guide member 128a and the second guide member 128b may each include at least one groove (e.g., the groove 128a-<NUM>) configured to accommodate the display support member <NUM>, and the display support member <NUM> may slide along the grooves in the first guide member 128a and the second guide member 128b. According to an embodiment, at least a portion of the guide members <NUM> (e.g., the first guide member 128a and the second guide member 128b) may be interpreted as a portion of the second housing <NUM>.

According to various embodiments, the display support member <NUM> may support at least a portion of the display <NUM> (e.g., the second display area A2). For example, the display support member <NUM> may support the display <NUM> together with the first housing <NUM>. According to an embodiment, as the first housing <NUM> slides, the display support member <NUM> is movable relative to the second housing <NUM>. For example, the display <NUM> may be connected to the first housing <NUM> and the display support member <NUM>. According to an embodiment, the display support member <NUM> may move along the first roller <NUM>.

According to various embodiments, the display support member <NUM> may include multiple bars <NUM> or rods. The multiple bars <NUM> may linearly extend, may be disposed in parallel to the rotation axis (e.g., the Y-axis direction) of the first roller <NUM>, and may be arranged substantially in parallel to each other along a direction (e.g., the direction in which the first housing <NUM> slides (X-axis direction)) perpendicular to the rotation axis (e.g., the Y-axis direction) of the first roller <NUM>.

According to various embodiments, each of the bars <NUM> may turn around the first roller <NUM> while maintaining the parallel state relative to another adjacent bar <NUM>. According to an embodiment, as the first housing <NUM> slides, the multiple bars <NUM> may be arranged to form a curved shape or may be arranged to form a flat shape. For example, as the first housing <NUM> slides, a portion of the display support member <NUM> facing the first roller <NUM> may form a curved surface, and another portion of the display support member <NUM> that does not face the first roller <NUM> may form a flat surface. According to an embodiment, the second display area A2 of the display <NUM> may be mounted or supported on the display support member <NUM>, and in the opened state (e.g., <FIG>), at least a portion of the second display area A2 may be visually exposed outside the second housing <NUM> together with the first display area A1. In the state in which the second display area A2 is exposed outside the second housing <NUM>, the display support member <NUM> may support or maintain at least of the second display area A2 in the flat state by forming a substantially flat surface. According to an embodiment, the display support member <NUM> may be interpreted as an articulated hinge structure.

According to various embodiments, the display support member <NUM> may include a multi-bar assembly <NUM> including multiple bars <NUM>, a first bracket <NUM> adjacent to one end 142a of the multi-bar assembly <NUM>, and a second bracket <NUM> adjacent to the other end 142b opposite to the one end 142a. According to an embodiment, the multi-bar assembly <NUM> may be disposed between the first bracket <NUM> and the second bracket <NUM>. According to an embodiment, the first bracket <NUM> may be disposed between the multi-bar assembly <NUM> and the first housing <NUM>. According to another embodiment, the first bracket <NUM> may be interpreted as a portion of the first housing <NUM>. According to an embodiment, when the electronic device <NUM> is unfolded (e.g., <FIG>), the second bracket <NUM> may be disposed inside the housings <NUM> and <NUM> and may not be visually exposed. According to an embodiment, the second bracket <NUM> may be connected to at least one spring structure 153c. According to an embodiment, the width of the second bracket <NUM> may be greater than that of the bars <NUM>. According to an embodiment, the bar <NUM> connected to the spring structure 153c among the multiple bars <NUM> may be interpreted as the second bracket <NUM>.

According to various embodiments, the electronic device <NUM> may include a slide guide member <NUM> provided for sliding movement of the first housing <NUM> relative to the second housing <NUM>. The slide guide member <NUM> may include a first roller <NUM>, at least one elastic belt structure <NUM>, and at least one second roller <NUM>.

According to various embodiments, the first roller <NUM> may guide the movement of the display <NUM>. According to an embodiment, the first roller <NUM> may be rotatably mounted at one edge of the base bracket <NUM>. According to an embodiment, the first roller <NUM> may guide the sliding movement of the second display area A2 while rotating about the rotation axis (e.g., the Y axis).

According to various embodiments, the elastic belt structure <NUM> may guide the sliding movement of the display support member <NUM>. For example, the elastic belt structure <NUM> may be connected to the first housing <NUM> and the second housing <NUM> and may provide an elastic force to the display support member <NUM>. For example, the elastic belt structure <NUM> may include an elastic belt 153a connected to the first housing <NUM>, an elastic belt bracket 153b connected to the elastic belt 153a and fixed to the rear surface plate <NUM>, and a spring structure 153c connected to the elastic belt bracket 153b and the display support member <NUM>. According to an embodiment, the elastic belt 153a and the spring structure 153c may provide elastic forces to the display support member <NUM> in different directions. The display support member <NUM> may receive elastic forces in the opposite directions by the elastic belt 153a and the spring structure 153c, and wrinkles or creases of the display <NUM> and/or the display support member <NUM> may be reduced.

According to various embodiments, the second roller <NUM> may guide the movement of the elastic belt <NUM>. According to an embodiment, the second roller <NUM> may be rotatably mounted at the other edge of the base bracket <NUM>. According to an embodiment, the second roller <NUM> may guide the sliding movement of the elastic belt 153a while rotating about the rotation axis (e.g., the Y axis).

According to various embodiments, the electronic device <NUM> may include a battery <NUM>. The battery <NUM> is capable of supplying power to at least one component of the electronic device <NUM>. According to an embodiment, the battery <NUM> may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell. According to an embodiment, the battery <NUM> may be disposed inside the housings <NUM> and <NUM>. For example, the battery <NUM> may be mounted on a portion of the second housing <NUM> (e.g., the base bracket <NUM>).

According to various embodiments, the electronic device <NUM> may include a printed circuit board <NUM> on which a processor (not illustrated) or a memory (not illustrated) is mounted. According to an embodiment, the printed circuit board <NUM> may be disposed inside the housings <NUM> and <NUM>. For example, the printed circuit board <NUM> may be disposed between the base bracket <NUM> and the rear surface plate <NUM>.

The processor may control one or more other components (e.g., a hardware component or a software component) of the electronic device <NUM>, which are connected to the processor and may perform various data processing or arithmetic operations by executing, for example, software (e.g., a program). According to an embodiment, the processor may include a main processor (e.g., a central processor or an application processor), or an auxiliary processor <NUM> (e.g., a graphics processor, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor), which operates independently from or together with the main processor <NUM>.

The memory may store various data used by at least one component (e.g., the processor) of the electronic device <NUM>. The memory may include volatile memory or non-volatile memory.

<FIG> are side views illustrating a closed state and an opened state of a slidable electronic device according to various embodiments of the disclosure.

Referring to <FIG>, an electronic device <NUM> includes a first housing <NUM>, a second housing <NUM>, a flexible display <NUM>, a roller (e.g., a first roller <NUM> or a second roller <NUM>), and a display support member <NUM> configured to support at least a portion of the flexible display <NUM>. The configurations of the first housing <NUM>, the second housing <NUM>, and the display support member <NUM> may be wholly or partly the same as the configurations of those of <FIG> and <FIG>.

According to various embodiments, a motor (e.g., the motor <NUM> of <FIG>) rotates the roller (e.g., the first roller <NUM> or the second roller <NUM>) to move the flexible display <NUM>.

According to various embodiments, in the flexible display <NUM>, a glass substrate or a high-hardness substrate may be replaced with a flexible film that is foldable/unfoldable. By using the film as the substrate, the flexible display is advantageous in that it is thin, light, strong against impact, and foldable/unfoldable. The flexible display may have a structure in which a film is stacked on a display. The film may have physical properties that maintain a viscoelastic characteristic and has a recovery characteristic in a wide temperature range.

According to various embodiments, the flexible display <NUM> includes a first display area <NUM> and a second display area <NUM>. For the first display area <NUM> and the second display area <NUM>, reference may be made to the descriptions made with reference to <FIG>.

According to various embodiments, the second display area A2 may include a (<NUM>-<NUM>)th area <NUM> and a (<NUM>-<NUM>)th area <NUM>.

According to various embodiments, the (<NUM>-<NUM>)th area <NUM> is an area of the flexible display <NUM> that forms a curved surface by a roller (e.g., the first roller <NUM> or the second roller <NUM>), and when the flexible display <NUM> is moved from the closed state <NUM> to the opened state <NUM> by a motor (e.g., the motor <NUM> of <FIG>), the (<NUM>-<NUM>)th area <NUM> may be located in the place where the first display area <NUM> has been located. For the closed state (e.g., <FIG>) and the opened state (e.g., <FIG>), reference may be made to descriptions made with reference to <FIG>.

According to various embodiments, in the closed state of the first housing <NUM> relative to the second housing <NUM> (e.g., <FIG>), the (<NUM>-<NUM>)th area <NUM> may form a curved surface and the (<NUM>-<NUM>)th area <NUM> may form a flat surface, and in the opened state (e.g., <FIG>) of the first housing <NUM> relative to the second housing <NUM> (e.g., <FIG>), the (<NUM>-<NUM>)th area <NUM> may form a flat surface and the (<NUM>-<NUM>)th area <NUM> may form a curved surface.

According to various embodiments, the (<NUM>-<NUM>)th area <NUM> will form a curved surface in the closed state (e.g., <FIG>) and will form a flat surface while moving to the opened state (e.g., <FIG>). The (<NUM>-<NUM>)th area <NUM> will form a flat surface in the closed state (e.g., <FIG>) and will form a curved surface while moving to the opened state (e.g., <FIG>).

According to various embodiments, the <NUM>-<NUM> area <NUM> may change in shape from a flat surface to a curved surface or vice versa while moving to the closed state (e.g., <FIG>) and the opened state (e.g., <FIG>). For example, a repulsive force <NUM> may act on the (<NUM>-<NUM>)th area <NUM> due to the shape change of the (<NUM>-<NUM>)th area <NUM>. For example, when the (<NUM>-<NUM>)th area <NUM> changes in shape from a flat surface to a curved surface, a greater repulsive force may act on the (<NUM>-<NUM>)th area <NUM> than that in a case where the (<NUM>-<NUM>)th area <NUM> changes in shape from a curved surface to a flat surface.

<FIG> is a side view illustrating lifting of a flexible display of a slidable electronic device according to various embodiments of the disclosure.

According to various embodiments, an electronic device <NUM> includes a first housing <NUM>, a second housing <NUM>, a display <NUM>, a display support member <NUM> configured to support at least a portion of the display <NUM>, a roller (e.g., the first roller <NUM> or the second roller <NUM>), and a flexible display <NUM>. For the above-mentioned components, the descriptions made with reference to <FIG> may be referred to.

According to various embodiments, the flexible display <NUM> includes a first display area <NUM> and a second display area <NUM>, and the second display area <NUM> includes a (<NUM>-<NUM>)th area <NUM> and a (<NUM>-<NUM>)th area <NUM>. For the above-mentioned components, reference may be made to the description made with reference to <FIG>.

According to various embodiments, the display support member <NUM> may include multiple bars <NUM> or rods. For example, as the first housing <NUM> slides, a portion of the display support member <NUM> facing the first roller <NUM> may form a curved surface. For example, the (<NUM>-<NUM>)th area <NUM> of the flexible display <NUM> is mounted or supported on the display support member <NUM>, and in order to enter the closed state (e.g., <FIG>), a portion of the (<NUM>-<NUM>)th area <NUM> may be introduced into the second housing <NUM>. After forming a substantially flat shape, the portion of the (<NUM>-<NUM>)th area <NUM> may form a curved surface while entering the closed state (e.g., <FIG>).

According to various embodiment, when the flexible display <NUM> forms a curved surface after forming a flat surface, a repulsive force may act to flatten lifting <NUM> of the flexible display <NUM> to the original state. According to another embodiment, when the flexible display <NUM> forms a curved surface after forming a flat surface, a restoring force (not illustrated) may act to restore the original shape. For example, as the display support member <NUM> moves to position the (<NUM>-<NUM>)th area <NUM> inside, a gap may be formed relative to the display support member <NUM> by a repulsive force. For example, in a vicinity where a portion of the display support member <NUM> forms a curved surface, the (<NUM>-<NUM>)th area <NUM> will be less bent than the curved surface of the first roller <NUM> due to a repulsive force which maintains the flat surface. According to the physical properties of the flexible display <NUM>, the repulsive force may increase or decrease in accordance with condition.

Since the lifting <NUM> caused by the repulsive force deforms the flexible display <NUM>, the sliding movement of the flexible display <NUM> may not be smooth, and when the touch panel or the like comes into contact with a user, problems in terms of the quality and stability of the display may occur. Therefore, it is necessary to minimize the degree of deformation of the flexible display <NUM> by the repulsive force.

According to various embodiments, a motor (e.g., the motor <NUM> of <FIG>) may control an output in order to prevent smooth movement from being inhibited by the repulsive force of the flexible display <NUM>. According to another embodiment, when the motor is strongly controlled in a state in which the repulsive force of the flexible display <NUM> is generated, the stress of the flexible display <NUM> may be increased, so the motor output may be controlled for stability.

<FIG> is a view for describing a difference in repulsive force according to the operation of a slidable electronic device according to various embodiments of the disclosure.

Referring to <FIG>, <NUM> indicates a graph representing a repulsive force measured when moving from an opened state (e.g., <FIG>) to a closed state (e.g., <FIG>), and <NUM> indicates a graph representing a repulsive force measured when moving from a closed state (e.g., <FIG>) to an opened state (e.g., <FIG>).

According to various embodiments, comparing the repulsive forces measured in a constant temperature environment for the (<NUM>-<NUM>)th area <NUM>, the repulsive force when moving from the opened state (e.g., <FIG>) to the closed state (e.g., <FIG>) (e.g., "Open to Close (<NUM>)" in <FIG>) may be greater than the repulsive force when moving in the opposite direction (e.g., "Close to Open (<NUM>)" in <FIG>). In other words, it can be seen that the repulsive force when the shape of the (<NUM>-<NUM>)th area <NUM> changes from a flat surface to a curved surface (e.g., "Open to Close" (<NUM>) in <FIG>) is greater than the repulsive force when the shape of the (<NUM>-<NUM>)th area <NUM> changes from a curved surface to a flat surface (e.g., "Close to Open (<NUM>)" in <FIG>).

According to various embodiments, when measuring the repulsive force of the (<NUM>-<NUM>)th area <NUM> in a constant temperature environment, the repulsive force when moving from the opened state (e.g., <FIG>) to the closed state (e.g., <FIG>) may be smaller than the repulsive force when moving in the opposite direction. In other words, the repulsive force when the (<NUM>-<NUM>)th area <NUM> changes in shape from a curved surface to a flat surface may be smaller than the repulsive force when the (<NUM>-<NUM>)th area <NUM> changes in shape from the flat surface to the curved surface.

According to various embodiments, by measuring the ambient temperature of the (<NUM>-<NUM>)th area <NUM> or the (<NUM>-<NUM>)th area <NUM> with reference to <FIG>, the repulsive force at a normal temperature and the repulsive force at a low temperature may be compared. Referring to the graphs <NUM> and <NUM> of <FIG>, in common, the repulsive force at the normal temperature may be smaller than the repulsive force at the low temperature.

For example, when moving from the opened state (e.g., <FIG>) to the closed state (e.g., <FIG>) as illustrated in (<NUM>) of <FIG> (e.g., "Open to Close (<NUM>)" in <FIG>), when the ambient temperature of the (<NUM>-<NUM>)th area <NUM> is the normal temperature, a lower repulsive force may act compared to the repulsive force when the ambient temperature is the low temperature. Similarly, when moving from the opened state (e.g., <FIG>) to the closed state (e.g., <FIG>) (e.g., "Open to Close (<NUM>)" in <FIG>), when the ambient temperature of the (<NUM>-<NUM>)th area <NUM> is the normal temperature, a lower repulsive force may act compared to the repulsive force when the ambient temperature is the low temperature.

For example, when moving from the closed state (e.g., <FIG>) to the opened state (e.g., <FIG>) as illustrated in (<NUM>) of <FIG> (e.g., "Close to Open (<NUM>)" in <FIG>), when the ambient temperature of the (<NUM>-<NUM>)th area <NUM> is the normal temperature, a lower repulsive force may act compared to the repulsive force when the ambient temperature is the low temperature. Similarly, comparing the repulsive forces acting on the (<NUM>-<NUM>)th area and measured at the normal temperature and at the low temperature when moving from the closed state (e.g., <FIG>) to the open state (e.g., <FIG>) (e.g., "Close to Open (<NUM>)" in <FIG>), the repulsive force at the low temperature may have a greater action/be greater than the action of the repulsive force at the low temperature. <FIG> is a view for describing a difference in repulsive force according to the operation of a slidable electronic device according to various embodiments of the disclosure.

The x-axis may represent the temperature, and the y-axis may represent the repulsive force. According to various embodiments, it can be seen that as the temperature decreases from a normal temperature for each range, the repulsive force increases. The unit of the repulsive force is not particularly defined and may be expressed as relative values between <NUM> and <NUM>. Referring to <FIG>, it can be seen that a greater repulsive force can be obtained in a low temperature range. In this regard, referring to Table <NUM> below, since the degree of increase in repulsive force for each temperature needs to be identified and the motor needs to be adjusted accordingly, the levels of repulsive forces may be identified in advance and quantified.

For example, as in Table <NUM>, temperature ranges divided at about <NUM>-degrees C intervals may be obtained by indicating a normal temperature, <NUM> degrees C, -<NUM> degrees C, and -<NUM> degrees C. Assuming that the normal temperature is equal to or higher than <NUM> degrees C, the magnitudes of the repulsive forces (the unit of which is omitted) of respective temperature ranges in one area of the flexible display <NUM> of the electronic device <NUM> may be compared. In order to compare the magnitudes of the repulsive forces in Table <NUM>, only the temperature condition may be varied, and the one area, the shape change, and the one-state holding time of the flexible display <NUM> may be set to be constant. As a result, it can be seen that the difference in repulsive force is approximately <NUM> at the normal temperature and, as the temperature decreases at approximately -<NUM> degree C intervals, the repulsive force increases to approximately <NUM>, <NUM>, and <NUM>. In Table <NUM>, the repulsive force increases gradually for each divided range, but the repulsive force may also increase continuously when the temperature decreases continuously.

<FIG> are views illustrating the sliding movement of each area of a flexible display in a slidable electronic device according to various embodiments of the disclosure. According to various embodiments, a flexible display <NUM> includes a first display area <NUM> and a second display area <NUM>, and the second display area may include a (<NUM>-<NUM>)th area <NUM> and a (<NUM>-<NUM>)th area <NUM>. For the flexible display <NUM>, the description of <FIG> may be referred to.

According to various embodiments, for the description of controlling the motor output when the flexible display <NUM> enters a curved section according to the closed state (e.g., <FIG>) and the open state (e.g., <FIG>), the description of <FIG> may be referred to. For the magnitude of the repulsive force <NUM> according to each temperature range of the flexible display <NUM>, the description of <FIG> may be referred to. For the description of the repulsive force <NUM> of the flexible display <NUM>, <FIG> may be referred to.

According to various embodiments, the temperature of each area of the flexible display <NUM> may be detected, and the motor output may be controlled according to the temperature when the corresponding area enters the curved section.

According to various embodiments, when it is intended to control the motor output according to the temperature when the flexible display <NUM> moves to the opened state (e.g., <FIG>) and the closed state (e.g., <FIG>), the point at which the reference temperature is to be measured may be a point in an area of the flexible display <NUM> entering a curved section.

According to various embodiments, when the flexible display <NUM> moves from the closed state (e.g., <FIG>) to the opened state (e.g., <FIG>) and the (<NUM>-<NUM>)th area, which has formed a curved surface, forms a flat surface, temperatures may be measured at point ② in <FIG> and point ③ in <FIG>, and the motor may be driven with reference to the measured temperatures. When the flexible display <NUM> moves from the opened state (e.g., <FIG>) to the closed state (e.g., <FIG>) and the (<NUM>-<NUM>)th area, which has formed a flat surface, forms a curved surface, temperatures may be measured at point ① and point ② in <FIG>, and the motor may be driven with reference to the measured temperatures.

According to various embodiments, when the flexible display <NUM> moves from the closed state (e.g., <FIG>) to the opened state (e.g., <FIG>) and the (<NUM>-<NUM>)th area, which has formed a flat surface, forms a curved surface, temperatures may be measured at point ③ and point ④ in <FIG>, and the motor may be driven with reference to the measured temperatures. According to various embodiments, when the flexible display <NUM> moves from the opened state (e.g., <FIG>) to the closed state (e.g., <FIG>) and the (<NUM>-<NUM>)th area, which has formed a curved surface, forms a flat surface, temperatures may be measured at point ② in <FIG> and point ③ in <FIG>, and the motor may be driven with reference to the measured temperatures. In other words, when each area enters a curved section, the motor output may be adjusted by using a thermistor adjacent to the corresponding area.

<FIG> is a diagram illustrating a difference in repulsive force according to a one-state holding time according to embodiments of the disclosure.

<FIG> is a diagram illustrating a motor output according to a one-state holding time according to an embodiment of the disclosure.

<FIG> is a diagram comparing the outputs of motors according to various embodiments of the disclosure.

According to various embodiments, a flexible display <NUM> includes a first display area <NUM> and a second display area <NUM>, and the second display area may include a (<NUM>-<NUM>)th area <NUM> and a (<NUM>-<NUM>)th area <NUM>. For the flexible display <NUM>, reference may be made to the description made with reference to <FIG>.

According to various embodiments, for the description of controlling the motor output when the flexible display <NUM> enters a curved section according to the closed state (e.g., <FIG>) and the opened state (e.g., <FIG>), the description of <FIG> may be referred to. For the magnitude of the repulsive force according to each temperature range of the flexible display <NUM>, the description of <FIG> may be referred to. For the description of the repulsive force of the flexible display <NUM>, <FIG> may be referred to.

According to various embodiments, the flexible display <NUM> may stop at one point while moving between the closed state (e.g., <FIG>) and the opened state (e.g., <FIG>). When a one-state holding time is represent on the x-axis and a repulsive force is represented on the y-axis, it can be seen that as the one-state holding time increases, the repulsive force increases and converges to a certain value. On the contrary to repulsive force, as the one-state holding time increases, it becomes difficult to restore, and thus a restoring force may gradually decrease. Referring to <FIG>, as the state in which the flexible display <NUM> is stopped is prolonged, the repulsive force <NUM> may gradually increase and then converge at a certain level. For example, as the time for which at least one surface of the flexible display <NUM> is held in a flat or curved state increases, the repulsive force may gradually increase.

For example, the magnitude of the repulsive force when the (<NUM>-<NUM>)th area <NUM> forms a flat surface in the opened state (e.g., <FIG>) and the flat surface is held for about <NUM> minutes and the magnitude of the repulsive force in a case when the (<NUM>-<NUM>)th area <NUM> forms a flat surface in the opened state (e.g., <FIG>) and the flat surface is held for about <NUM> hours may be compared. In the case where the flexible display <NUM> moves to the closed state (e.g., <FIG>), the repulsive force applied to the (<NUM>-<NUM>)th area <NUM> when the flexible display <NUM> is left for about <NUM> minutes may be smaller than the repulsive force acting on the (<NUM>-<NUM>)th area <NUM> when the flexible display <NUM> is left for about <NUM> hours.

Referring to <FIG>, the repulsive force <NUM> and the restoring force may be expressed as relative values without defining a specific unit.

Referring to Table <NUM> below, in the closed state (e.g., <FIG>), the (<NUM>-<NUM>)th area <NUM> may form a flat surface, and may hold the flat surface for about <NUM> minutes, <NUM> minutes, <NUM> hour, or <NUM> hours. For example, when the (<NUM>-<NUM>)th area <NUM> moves to the opened state (e.g., <FIG>) to form a curved surface while forming a flat surface for about <NUM> minutes, the restoring force (not illustrated) acting on the (<NUM>-<NUM>)th area <NUM> may be about <NUM>%. The unit of restoring force (not illustrated) may be omitted and may be understood as a relative value. When the (<NUM>-<NUM>)th area <NUM> moves to the opened state (e.g., <FIG>) to form a curved surface while forming a curved surface for about <NUM> hours, the restoring force (not illustrated) acting on the (<NUM>-<NUM>)th area <NUM> may be about <NUM>%. For example, if the (<NUM>-<NUM>)th area <NUM>, which is to form a curved surface, has been held in a flat state for about <NUM> hours, the (<NUM>-<NUM>)th area <NUM> may be difficult to form the curved surface and a great restoring force (not illustrated) to form the flat surface may act on the (<NUM>-<NUM>)th area. For example, with respect to one area forming a flat surface while the flexible display <NUM> moves between the closed state (e.g., <FIG>) and the open state (e.g., <FIG>), until the one-state holding time is less than <NUM> hour, the restoring force may increase significantly whenever the one-state holding time increases. It can be seen that the range of increase in restoring force is reduced when the one-state holding time is about <NUM> hour or more.

According to various embodiments, the one-state holding time (leaving time) of the flexible display <NUM> in the closed state (e.g., <FIG>) and the opened state (e.g., <FIG>) may be counted, and the motor output is controlled according to the one-state holding time. Since the repulsive force <NUM> increases as the one-state holding time increases, the output may be increased to maintain the sliding speed of the flexible display <NUM> constant. Referring to <FIG>, it can be seen that the increase rate of the output in the section where the one-state holding time on the x-axis is less than about <NUM> hour is greater than the increase rate of the output when the one-state holding time is equal to or greater than <NUM> hour. For example, it can be seen that the repulsive force <NUM> and the restoring force converge to certain values when the one-state holding time is about <NUM> hours or more.

Referring to Table <NUM>, it is possible to identify the level of an output according to each one-state holding time. For example, when a motor output was measured while gradually increasing the leaving time (the one-state holding time) at intervals of about <NUM> minutes,.

Referring to Table <NUM>, it can be seen that in the section where the leaving time (the one-state holding time) is about <NUM> minutes, the restoring force is about <NUM>% and when the leaving time (the one-state holding time) is about <NUM> hour, the restoring force is about <NUM>%.

According to various embodiments, since the force to return the flexible display <NUM> to its original shape increases as the restoring force increases, the motor output may be increased such that the flexible display <NUM> naturally slides by the roller while forming a curved surface. Therefore, it can be understood that as the restoring force increases, the motor output may also increase.

For example, in Table <NUM>, it can be seen that as the leaving time increases at intervals of about <NUM> minutes, the motor output gradually increases by about <NUM>% to about <NUM>%. The increase rate of the motor output may be controlled in consideration of the increase rate of the restoring force according to the increase of the leaving time. For example, in Table <NUM>, assuming that the motor output is controlled to about <NUM>% in the case where the leaving time is about <NUM> hours or more, the motor output may be controlled to be lowered to <NUM>% in the case where the leaving time is less than about <NUM> minutes.

According to various embodiments, the motor output may be controlled in complex consideration of various environments in which the flexible display <NUM> is placed. For the description of the repulsive force according to the shape change of the flexible display <NUM>, <FIG> may be referred to. For the description of the repulsive force according to the temperature of the flexible display <NUM>, <FIG> may be referred to. For the description of the repulsive force according to the one-state holding time of the flexible display <NUM>, <FIG> may be referred to.

According to various embodiments, the repulsive force of the flexible display <NUM> may be determined in complex consideration of various environments in which the flexible display <NUM> is placed. It can be seen that the repulsive force <NUM> of the flexible display <NUM> may be determined according to at least one of the shape change, the temperature, and the one-state holding time of the flexible display <NUM>.

Referring to Table <NUM>, the time for measuring the time to maintain one of the open state (e.g., <FIG>) or the closed state (e.g., <FIG>) (leaving time) may be divided into <NUM>-minute increments. A motor (e.g., the motor <NUM> of <FIG>) may rotate the roller to move the flexible display <NUM>, and the flexible display <NUM> may be divided into first to fourth sections with reference to the rotation angle. For example, with reference to one area of the flexible display <NUM>, according to the rotation angle of the roller, it may be assumed that the state immediately before entering the roller is a first section, and the section forming a curved surface by the rotation of the roller may be divided into second to fourth sections. It can be identified that in each of the first to fourth sections, the motor output (motor duty) gradually increases as the one-state holding time increases. In addition, it can be seen that the repulsive force gradually increases when moving from the first section to the fourth section when the one-state holding time is maintained constant.

For example, when the (<NUM>-<NUM>)th area <NUM> of the flexible display <NUM> moves from the opened state (e.g., <FIG>) to the closed state (e.g., <FIG>), the time for which the flat surface is formed may be counted in the opened state (e.g., <FIG>). When the holding time for which the flat surface is formed is between about <NUM> and <NUM> minutes, the (<NUM>-<NUM>)th area <NUM> may enter a section in which the (<NUM>-<NUM>)th area is curved by the roller so that the closed state (e.g., <FIG>) is made by the operation of the motor. The roller may move the (<NUM>-<NUM>)th area <NUM> while rotating from the opened state (e.g., <FIG>) to the closed state (e.g., <FIG>). The first section in which the (<NUM>-<NUM>)th area <NUM> forms a curved surface may refer to a rotation angle range (about <NUM> degrees or more) of the roller in which the (<NUM>-<NUM>)th area <NUM> moves while forming a flat surface and then enters the section curved by the roller. The second section refers to a section between about <NUM> degrees and <NUM> degrees in which the (<NUM>-<NUM>)th area <NUM> further forms a curved shape while the roller further rotates from the first section, and the third section and the fourth section refer to a section from about <NUM> degrees to <NUM> degrees and a section of less than <NUM> degrees, respectively, in each of which the corresponding portion of the (<NUM>-<NUM>)th area <NUM> forms a curved surface. It can be seen that as the (<NUM>-<NUM>)th area <NUM> formed a curved surface according to the rotation of the roller from the first section to the fourth section, the motor output also increased from about <NUM>% to about <NUM>%.

According to various embodiments, the output may be continuously increased in at least one of a case where at a portion of the second display area changes from the flat surface to the curved surface, a case where the temperature of the flexible display is equal to or lower than a specific temperature, and a case where the one-state holding time of the flexible display is greater than or equal to a predetermined period of time. Referring to <FIG>, by representing on the X axis the case where at least a portion of the second display area changes in shape from a flat surface to a curved surface while the roller rotates from the closed state (e.g., <FIG>) to the opened state (e.g., <FIG>) is the x-axis, the magnitudes of repulsive forces <NUM> may be compared according to a temperature. At this time, when the one-state holding times are equally set to less than <NUM> minutes and the repulsive force is shown for each temperature, it can be seen that the repulsive forces show values between <NUM>% and <NUM>% at a normal temperature, while the repulsive forces have values between <NUM>% and <NUM>% at a low temperature. When the temperature is maintained at the normal temperature and the repulsive force is shown for each one-state holding time, it can be seen that the repulsive force when the one-state holding time is <NUM> minutes is about <NUM>% higher than the repulsive force when the one-state holding time is <NUM> minutes.

<FIG> is a view illustrating a motor and a driving rail in an electronic device of the disclosure.

According to various embodiments, an electronic device <NUM> includes a first housing <NUM>, a second housing <NUM>, a display <NUM>, and a display support member <NUM> configured to support at least a portion of the display <NUM>. The configurations of the first housing <NUM>, the second housing <NUM>, the display <NUM>, and the display support member <NUM> may be wholly or partly the same as those of the first housing <NUM>, the second housing <NUM>, and the display <NUM> of <FIG> and <FIG>. For the first housing <NUM>, the second housing <NUM>, the flexible display <NUM>, the roller (e.g., the first roller <NUM> or the second roller <NUM>) and the support member <NUM>, the disclosures of <FIG> may be referred to.

For example, referring to <FIG>, by adjusting a reference voltage duty (Vref duty) of each phase A/B in a motor (e.g., the motor <NUM> of <FIG>) of a step motor driver integrated circuit (IC), it is possible to control the output by the rotation of a rotor. The output of the motor (e.g., the motor <NUM> of <FIG>) may be adjusted such that when the duty of the reference voltage (Vref) increases, an average current (Iavg) increases and the magnetic field of a stator phase increases to increase the rotation speed (output) of the rotor. Therefore, regarding the duty of the motor (e.g., the motor <NUM> of <FIG>), a period in which the reference voltage (Vref) is applied may be referred to as a duty-on section and a period in which the reference voltage (Vref) is <NUM> may be referred to as a duty-off section.

According to various embodiments, when the flexible display <NUM> slides and enters a curved section, a repulsive force <NUM> may act on the flexible display <NUM>. For the description of the repulsive force <NUM>, <FIG> may be referred to. In order to prevent the sliding movement due to the repulsive force of the flexible display <NUM> from deteriorating, it is possible to maintain the moving speed constant by increasing the output of the motor (e.g., the motor <NUM> of <FIG>). Alternatively, by appropriately adjusting the output of the motor (e.g., the motor <NUM> of <FIG>), it is possible to prevent excessive stress from being applied to the flexible display <NUM>.

Claim 1:
An electronic device comprising:
a first housing (<NUM>);
a second housing (<NUM>) configured to accommodate at least a portion of the first housing (<NUM>) and to guide a sliding movement of the first housing (<NUM>);
a flexible display (<NUM>) including a first display area (<NUM>) connected to the first housing (<NUM>) and a second display area (<NUM>) extending from the first display area (<NUM>) and at least partially accommodated inside or visually exposed outside the second housing (<NUM>) according to the sliding movement of the first housing (<NUM>);
a roller (<NUM>) disposed inside the second housing (<NUM>) and configured to move the flexible display (<NUM>), bringing the electronic device in an open or a closed state, and to guide the second display area (<NUM>) when the flexible display (<NUM>) is moved;
a motor (<NUM>) configured to rotate the roller (<NUM>); and
a support member (<NUM>) configured to support at least a portion of the flexible display (<NUM>) in the second display area (<NUM>),
characterised in that:
the motor (<NUM>) is configured such that an output of the motor (<NUM>) is determined according to a one-state holding time of the flexible display (<NUM>), the one-state holding time being the amount of time that the electronic device was left in the open state, the closed state or the state whereby the flexible display was stopped at one point while moving between the closed state and the open state.