Electronic device including flexible display for removing color fringe, method, and storage medium

Abstract

A rollable electronic device may comprise: a housing including a first housing part and a second housing part that is movably coupled to the first housing part between a reduction position and an extension position; a flexible display; a memory storing instructions; and at least one processor. The instructions, when executed individually or collectively by the at least one processor, may cause the rollable electronic device to: control the flexible display to perform display on a first display area of the flexible display located outside the housing; identify the second housing part moved toward the extension position relative to the first housing part; and within a time interval set in relation to the identifying, control the flexible display to reduce the luminance of a peripheral area of the first display area, which is defined from the boundary between the first display area and a second display area of the flexible display located inside the housing.

Description

Electronic device, method, and storage medium including a flexible display for eliminating color fringe

[0001] The following descriptions relate to electronic devices, methods, and storage media including a flexible display for eliminating color fringe.

[0002] An electronic device may include a flexible display. For example, at least a portion of the flexible display may be retractable into or retractable from a housing of the electronic device to change the size of a display area of ​​the flexible display. The flexible display may include a plurality of light-emitting elements.

[0003] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above is applicable as prior art related to the present disclosure.

[0004] A rollable electronic device may include a housing comprising a first housing part and a second housing part movably coupled to the first housing part between a collapsed position and an extended position. The rollable electronic device may include a flexible display. The rollable electronic device may include one or more storage media and a memory storing instructions. The rollable electronic device may include at least one processor including a processing circuit. The instructions, when individually or collectively executed by the at least one processor, may cause the rollable electronic device to control the flexible display to perform a display on a first display area of ​​the flexible display located outside the housing. The instructions, when individually or collectively executed by the at least one processor, may cause the rollable electronic device to identify the second housing part as being moved toward the expanded position relative to the first housing part. The instructions, when individually or collectively executed by the at least one processor, may cause the rollable electronic device to control the flexible display to reduce the luminance of a peripheral area of ​​the first display area, defined by a boundary between the first display area and a second display area of ​​the flexible display positioned within the housing, within a time interval set in relation to the identification.

[0005] A method performed by a rollable electronic device including a housing and a flexible display, the housing including a first housing part and a second housing part movably coupled to the first housing part between a collapsed position and an expanded position, may include controlling the flexible display to perform a display on a first display area of ​​the flexible display located outside the housing. The method may include identifying the second housing part as being moved toward the expanded position with respect to the first housing part. The method may include controlling the flexible display to reduce the luminance of a peripheral area of ​​the first display area, the peripheral area being defined by a boundary between the first display area and a second display area of ​​the flexible display located within the housing, within a time period set in relation to the identification.

[0006] A non-transitory computer-readable storage medium may store one or more programs comprising instructions that, when individually or collectively executed by at least one processor of a rollable electronic device including a housing and a flexible display, the instructions cause the flexible display to perform a display on a first display area of ​​the flexible display located outside the housing, the housing including a first housing part and a second housing part movably coupled to the first housing part between a collapsed position and an expanded position. The non-transitory computer-readable storage medium may store one or more programs comprising instructions that, when individually or collectively executed by at least one processor, cause the second housing part to be moved toward the expanded position relative to the first housing part. The non-transitory computer-readable storage medium may store one or more programs comprising instructions that, when executed individually or collectively by at least one processor, cause the flexible display to control the flexible display to reduce the luminance of a peripheral area of ​​the first display area, defined from a boundary between the first display area and a second display area of ​​the flexible display positioned within the housing, within a time interval set in relation to the identification.

[0007] FIG. 1 is a block diagram of an electronic device within a network environment according to various embodiments.

[0008] FIG. 2 is a block diagram of a display module according to various embodiments.

[0009] FIG. 3 illustrates an exemplary rollable electronic device according to one embodiment.

[0010] Figure 4a shows an example of color fringes according to the arrangement of light-emitting elements of the display.

[0011] FIG. 4b illustrates an example of color fringes caused in a rollable electronic device including a flexible display.

[0012] FIG. 5 illustrates an example of a method for removing color fringes from a rollable electronic device using a gradation image.

[0013] FIG. 6 illustrates an example of an operational flow for a method of removing color fringes from a rollable electronic device using a gradient image.

[0014] Figures 7a and 7b illustrate examples of display areas in which gradient images are displayed.

[0015] FIGS. 8A to 8C illustrate examples of a method for removing color fringes in a rollable electronic device using a gradient BM (black matrix).

[0016] Figures 9a to 9c illustrate examples of gradient BM.

[0017] Figures 10a and 10b illustrate examples of rollable electronic devices according to the direction of movement of the housing.

[0018] The terms used in this disclosure are used only to describe specific embodiments and may not be intended to limit the scope of other embodiments. The singular expression may include plural expressions unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by those of ordinary skill in the art described in this disclosure. Terms defined in general dictionaries among the terms used in this disclosure may be interpreted as having the same or similar meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined in this disclosure. In some cases, even if a term is defined in this disclosure, it cannot be interpreted to exclude embodiments of the present disclosure.

[0019] The various embodiments of the present disclosure described below illustrate a hardware-based approach as an example. However, since the various embodiments of the present disclosure include techniques utilizing both hardware and software, the various embodiments of the present disclosure do not exclude a software-based approach.

[0020] In addition, in the present disclosure, expressions such as "more than" or "less than" may be used to determine whether a specific condition is satisfied or fulfilled. However, this is merely a description for expressing an example and does not exclude descriptions such as "more than" or "less than." Conditions described as "more than" may be replaced with "more than," conditions described as "less than," and conditions described as "more than and less than" may be replaced with "more than and less than." In addition, hereinafter, "A" to "B" mean at least one of the elements from A (including A) to B (including B).

[0021] FIG. 1 is a block diagram of an electronic device within a network environment according to various embodiments.

[0022] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with 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 one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection 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 (196), or an antenna module (197). In some embodiments, the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added. In some embodiments, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0023] The processor (120) may, for example, execute 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) connected to the processor (120) and perform various data processing or calculations. According to one embodiment, as at least a part of the data processing or calculations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or a secondary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor)) that can operate independently or together therewith. For example, if the electronic device (101) includes a main processor (121) and a secondary processor (123), the secondary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a specified function. The secondary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0024] The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf 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 (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of 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), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0025] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0026] The program (140) may be stored as software in the memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0027] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0028] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0029] The display module (160) can visually provide information to an external party (e.g., a user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. In one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0030] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

[0031] The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0032] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) with an external electronic device (e.g., the electronic device (102)). In one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0033] The connection terminal (178) may include a connector through which the electronic device (101) may be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0034] A haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. In one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0035] The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0036] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least a part of a power management integrated circuit (PMIC).

[0037] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0038] The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one 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 module). Among these communication modules, the corresponding communication module can communicate with an external electronic device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0039] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can 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 one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0040] The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module (197) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as the first network (198) or the second network (199), may be selected from the plurality of antennas by, for example, the communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. In some embodiments, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (197).

[0041] According to various embodiments, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.

[0042] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0043] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0044] FIG. 2 is a block diagram of a display module according to various embodiments.

[0045] Referring to FIG. 2, the display module (160) may include a display (210) and a display driver IC (DDI) (230) for controlling the display (210). The DDI (230) may include an interface module (231), a memory (233) (e.g., a buffer memory), an image processing module (235), or a mapping module (237). The DDI (230) may receive, for example, image information including image data or an image control signal corresponding to a command for controlling the image data, from another component of the electronic device (101) through the interface module (231). For example, according to one embodiment, image information may be received from a processor (120) (e.g., a main processor (121) (e.g., an application processor) or an auxiliary processor (123) (e.g., a graphics processing unit) that operates independently of the function of the main processor (121). The DDI (230) may communicate with a touch circuit (250) or a sensor module (176) through the interface module (231). In addition, the DDI (230) may store at least a part of the received image information in the memory (233), for example, in units of frames. The image processing module (235) may, for example, perform preprocessing or postprocessing (e.g., resolution, brightness, or size adjustment) on at least a part of the image data based at least on the characteristics of the image data or the characteristics of the display (210). The mapping module (237) may generate a voltage value or a current value corresponding to the image data that has been preprocessed or postprocessed through the image processing module (235). According to one embodiment, the voltage The generation of the values ​​or current values ​​may be performed based at least in part on properties of the pixels of the display (210), for example, the arrangement of the pixels (RGB stripe or pentile structure), or the size of each of the sub-pixels.At least some pixels of the display (210) may be driven based at least in part on, for example, the voltage value or current value, so that visual information (e.g., text, an image, or an icon) corresponding to the image data may be displayed through the display (210).

[0046] According to one embodiment, the display module (160) may further include a touch circuit (250). The touch circuit (250) may include a touch sensor (251) and a touch sensor IC (253) for controlling the same. The touch sensor IC (253) may control the touch sensor (251) to detect, for example, a touch input or a hovering input for a specific location of the display (210). For example, the touch sensor IC (253) may detect a touch input or a hovering input by measuring a change in a signal (e.g., voltage, light quantity, resistance, or charge quantity) for a specific location of the display (210). The touch sensor IC (253) may provide information (e.g., location, area, pressure, or time) regarding the detected touch input or hovering input to the processor (120). According to one embodiment, at least a portion of the touch circuit (250) (e.g., touch sensor IC (253)) may be included as part of the display driver IC (230), or as part of the display (210), or as part of another component (e.g., auxiliary processor (123)) disposed external to the display module (160).

[0047] According to one embodiment, the display module (160) may further include at least one sensor (e.g., a fingerprint sensor, an iris sensor, a pressure sensor, or an illuminance sensor) of the sensor module (176), or a control circuit therefor. In this case, the at least one sensor or the control circuit therefor may be embedded in a part of the display module (160) (e.g., the display (210) or the DDI (230)) or a part of the touch circuit (250). For example, if the sensor module (176) embedded in the display module (160) includes a biometric sensor (e.g., a fingerprint sensor), the biometric sensor may obtain biometric information (e.g., a fingerprint image) associated with a touch input through a part of the display (210). As another example, if the sensor module (176) embedded in the display module (160) includes a pressure sensor, the pressure sensor may obtain pressure information associated with a touch input through a part or the entire area of ​​the display (210). According to one embodiment, the touch sensor (251) or sensor module (176) may be positioned between pixels of a pixel layer of the display (210), or above or below the pixel layer.

[0048] FIG. 3 illustrates an exemplary rollable electronic device according to one embodiment.

[0049] Referring to FIG. 3, according to one embodiment, the electronic device (101) may include a first housing (310) and a second housing (320). For example, the first housing (310) may be referred to as a first housing part. For example, the second housing (320) may be referred to as a second housing part.

[0050] In one embodiment, the first housing (310) can accommodate at least a portion of the second housing (320). The first housing (310) can enclose (or surround) at least a portion of the second housing (320).

[0051] In one embodiment, the second housing (320) may be movable relative to the first housing (310). The second housing (320) may be movable linearly relative to the first housing (310). The second housing (320) may be slidable relative to the first housing (310). For example, the second housing (320) may be movable relative to the first housing (310) in a first direction (d1) and / or a second direction (d2) opposite to the first direction (d1). As the second housing (320) moves in the first direction (d1), the second housing (320) may slide outward from the first housing (310). As the second housing (320) moves in the second direction (d2), the second housing (320) may slide inward from the first housing (310). The state of the electronic device (101) may be changed by movement of the second housing (320) with respect to the first housing (310). The state of the electronic device (101) may include a slide-in state (301) and / or a slide-out state (302). Within the slide-in state (301) of the electronic device (101), the second housing (320) may be movable in a first direction (d1) among a first direction (d1) and a second direction (d2) with respect to the first housing (310). For example, within the slide-in state (301) of the electronic device (101), the second housing (320) may be movable only in the first direction (d1). Within the slide-out state (302) of the electronic device (101), the second housing (320) may be movable in a first direction (d1) and a second direction (d2) with respect to the first housing (310). For example, within the slide-out state (302) of the electronic device (101), the second housing (320) may be movable only in the second direction (d2). In the slide-in state (301), the second housing (320) may be positioned in an extended position.In the slide-out state (302), the second housing (320) can be positioned in a retracted position.

[0052] According to one embodiment, the display (210) may be disposed on the second housing (320). The display (210) may be movable relative to the first housing (310) by movement of the second housing (310) relative to the first housing (310). For example, the display (210) may be movable from the inside of the first housing (310) to the outside of the first housing (310) by movement of the second housing (320) in the first direction (d1). For example, in the slide-out state (302) of the electronic device (101), the size of the electronic device (101) exposed to the outside of the first housing (310) may be at a maximum. For example, the display (210) may be movable from the outside of the first housing (310) to the inside of the first housing (310) by movement of the second housing (320) in the second direction (d2). For example, the display (210) can be rolled into the interior of the first housing (310) from the outside of the first housing (310) by movement of the second housing (320) in the second direction (d2).

[0053] According to one embodiment, the first region (311) may be disposed on the second housing (320). The shape of the first region (311) may be maintained independently of the movement of the second housing (320) relative to the first housing (310). The first region (311) may not be deformed by the movement of the second housing (320) relative to the first housing (310). The first region (211) may be exposed to the outside of the first housing (310) independently of the movement of the second housing (320) relative to the first housing (310). For example, the first region (311) may be referred to as a first display part of the display (210).

[0054] According to one embodiment, the second region (321) can be connected to the first region (311). The second region (321) can be deformed by movement of the second housing (320) relative to the first housing (310). For example, the second region (321) can have a curved shape within the first housing (310) within the slide-in state (301) of the electronic device (101). The second region (321) can be moved outside the first housing (310) by movement of the second housing (320) in the first direction (d1). The second region (321) can define (or form) substantially one plane with the first region (311) while being exposed to the outside of the first housing (310). The second region (321) can move into the interior of the first housing (310) by movement of the second housing (320) in the second direction (d2). For example, the second region (321) can be referred to as a second display part or rolling part of the display (210).

[0055] In the example of FIG. 3, an example of an electronic device (101) in which a second housing (320) moves in a first direction (d1) is shown, but embodiments of the present disclosure are not limited thereto. For example, embodiments of the present disclosure may also be applied to an electronic device (101) that is expandable in a first direction (d1) or a second direction (d2), and a third direction (d3) or a fourth direction (d4) with respect to the first housing (310), such as the electronic device (101) of FIGS. 10A and 10B.

[0056] Although not illustrated in FIG. 3, the electronic device (101) may include an actuator (e.g., actuator (815) of FIG. 8A) (or motor) configured to allow the second housing (320) to move relative to the first housing (310). However, the present disclosure is not limited thereto. For example, the electronic device (101) may also include at least one gear connected to the actuator. At least a portion of the actuator and the at least one gear may be referred to as a driving mechanism.

[0057] Referring to FIGS. 1 to 3, the electronic device (101) may include a display (210) that is a flexible display. For example, the electronic device (101) may be a rollable electronic device that includes the flexible display. The electronic device (101) may be referred to as a rollable electronic device. For example, the rollable electronic device may include a housing that includes a first housing part (e.g., the third housing (310) of FIG. 3) and a second housing part (e.g., the second housing (320) of FIG. 3) that is movably coupled to the first housing part between a collapsed position and an expanded position. For example, the flexible display may be connected to the housing.

[0058] Additionally, the electronic device (101) may include at least one processor. For example, the at least one processor may be an example of the processor (120) of FIG. 1. For example, the processor (120) may include various processing circuits and / or multiple processors. For example, the term "processor" as used herein, including in the claims, may include various processing circuits including at least one processor, and one or more of the at least one processor may be configured to perform the various functions described below individually or collectively in a distributed manner. As used herein, when "processor," "at least one processor," and "one or more processors" are described as being configured to perform various functions, these terms encompass, for example, and without limitation, situations where one processor performs some of the recited functions and other processor(s) perform other parts of the recited functions, as well as situations where one processor can perform all of the recited functions. Additionally, the at least one processor may comprise a combination of processors that perform the various functions enumerated / disclosed, for example, in a distributed manner. The at least one processor may execute program instructions to achieve or perform the various functions.

[0059] However, the present disclosure is not limited thereto. For example, the electronic device (101) may include a DDI (230) connected to the at least one processor. For example, the electronic device (101) may perform processing of an image to be displayed through the display (210) using the at least one processor or the DDI (230). For example, the processing of the image may include processing for generating (or obtaining) a gradient image, as described below.

[0060] Figure 4a shows an example of color fringes according to the arrangement of light-emitting elements of the display.

[0061] FIG. 4A illustrates an example (400) of color fringes that may be caused by the arrangement of light-emitting elements of a display (210). For example, the light-emitting elements may emit light based on a signal obtained from a DDI (230). For example, the light-emitting elements may include light-emitting diodes (LEDs). For example, the light-emitting elements may include light-emitting diodes whose colors visible from the outside are red (R), blue (B), or green (G). The gradation (or grayscale or gray level) of the color displayed by the light-emitting elements may change. Depending on the change in the gradation, the brightness (or luminance) visible from the outside may change.

[0062] For example, the color fringe may represent an unintended display of color that may occur at the edges and corners of the display (210) depending on the arrangement of the light emitting elements (or the pentile structure).

[0063] Referring to example (400), light emitting elements of specific colors (e.g., R and B) may be arranged on a first edge (401) of the display (210). In addition, light emitting elements of specific colors (e.g., R and B) may be arranged on a second edge (402) of the display (210). For example, a line composed of light emitting elements of R and B colors on the first edge (401) (or the second edge (402)) may be referred to as an R and B sub-pixel line. For example, the line on the first edge (401) may be formed in a first direction (e.g., a horizontal direction). For example, the line on the second edge (402) may be formed in a second direction (e.g., a vertical direction) that is perpendicular to the first direction. At this time, light emitting elements of specific colors (e.g., R and B) may be placed at the corner between the first edge (401) and the second edge (402).

[0064] Referring to example (400), light emitting elements of a specific color (e.g., G) may be arranged at the third edge (403) of the display (210). In addition, light emitting elements of a specific color (e.g., G) may be arranged at the fourth edge (404) of the display (210). At this time, light emitting elements of a specific color (e.g., G) may be arranged at the corner between the third edge (403) and the fourth edge (404). For example, a line composed of light emitting elements of a G color at the third edge (403) (or the fourth edge (404)) may be referred to as a G sub-pixel line. For example, the line at the third edge (403) may be formed in the first direction. For example, the line at the fourth edge (404) may be formed in the second direction. At this time, light-emitting elements of a specific color (e.g., G) may be placed at the corner between the third edge (403) and the fourth edge (404).

[0065] Referring to example (400), while outputting an image, the color output (or externally visible) on the first edge (401) and the second edge (402) may have a magenta color. For example, the magenta color may be generated by a combination of R and B. Also, referring to example (400), while outputting an image, the color output (or externally visible) on the third edge (403) and the fourth edge (404) may have a G color. As described above, color fringe, in which unintended colors are displayed at the edges and corners of the display (210), may be caused by the arrangement of the light-emitting elements. An example of color fringe caused in a rollable electronic device may be referred to in FIG. 4B below.

[0066] FIG. 4b illustrates an example of color fringes caused in a rollable electronic device including a flexible display.

[0067] FIG. 4B illustrates examples (411, 412, 413, 414) of color fringes that occur as the state of the rollable electronic device (101) of FIG. 3 changes. The display (210) of FIG. 4B may be a flexible display including the first region (311) and the second region (312) of FIG. 3.

[0068] Referring to FIG. 4B, example (411) illustrates the display (210) in a slide-in state (301) of the rollable electronic device (101). In example (411), a first region (311) of the display (210) can be visually exposed. As time passes from example (411) to examples (412), (413), and (414), the housing (e.g., the second housing (320) of FIG. 3) of the rollable electronic device (101) can be moved toward an extended position. Example (414) illustrates the display (210) in a fully slide-out state (302) of the rollable electronic device (101). In example (414), the first region (311) and the second region (312-3) of the display (210) can be visually exposed. Examples (412) and (413) illustrate the display (210) in a slide-out state (302) (or intermediate state) between examples (411) and (414). In example (412), a first region (311) and a second region (312-1) of the display (210) may be visually exposed, and in example (413), a first region (311) and a second region (312-2) of the display (210) may be visually exposed. For example, the region (or display region) of the display (210) that is visually exposed may be referred to as a first display region. For example, the first display region may represent a region of the display (210) that is located outside the housing of the rollable electronic device (101). Alternatively, a region (or display region) of the display (210) that is not visually exposed (or visually obscured) may be referred to as a second display region. For example, the second display area may represent an area of ​​a display (210) located within the housing of the rollable electronic device (101). In example (411), the first area (311) may be the first display area. In example (412), the first area (311) and the second area (311-1) may be the first display area.

[0069] Referring to example (411), in the slide-in state (301), a first region (311) of the display (210) can be visually exposed. For example, the first region (311) can include a first edge (421), a second edge (422), a third edge (423), and a fourth edge (424). The rollable electronic device (101) can perform image processing to improve (or, alleviate, reduce) color fringe. For example, the DDI (230) of the rollable electronic device (101) can adjust grayscale values ​​of portions of images to be displayed through light-emitting elements of the edges (421, 422, 423, 424), among the images to be displayed at the edges (421, 422, 423, 424).

[0070] For example, the DDI (230) can obtain information for adjusting grayscale values ​​of the image portion to be displayed through the light-emitting elements of the edges (421, 422, 423, 424) (or information about the image portion) from at least one processor (120) (e.g., AP). The DDI (210) can adjust grayscale values ​​of the image portion to be displayed through the light-emitting elements of the edges (421, 422, 423, 424) based on the information. Alternatively, for example, the DDI (230) can directly adjust grayscale values ​​of the image portion to be displayed through the light-emitting elements of the edges (421, 422, 423, 424) based on information obtained from a sensor (e.g., the sensor module (176) of FIG. 2) when displaying an image including the image portion obtained from at least one processor (120). For example, the sensor may include an illuminance sensor (or sensor hub) connected to the DDI (230) via an interface. For example, the DDI (230) may adjust the grayscale values ​​of the portion of the image to be displayed through the light-emitting elements of the edges (421, 422, 423, 424) based on the information obtained from the sensor (e.g., a sensing value for illuminance of an external environment). In the above example, an example in which the DDI (230) adjusts the grayscale values ​​using the information obtained from the sensor is described, but the present disclosure is not limited thereto. For example, the DDI (230) may adjust the grayscale values ​​using at least one of a background color (or representative color) of the content in the image to be displayed through the display (210) or a current luminance of the display (210) of the rollable electronic device (101).

[0071] Additionally, in the above example, it is described that grayscale values ​​are adjusted using information obtained from at least one processor (120), information obtained from a sensor connected to the DDI (230), or information directly identified by the DDI (230) (e.g., background color of content), but the present disclosure is not limited thereto. For example, in addition to the grayscale values, the DDI (230) can also adjust an area (or range) in which the grayscale values ​​are to be adjusted.

[0072] In the above example, an example is described in which the rollable electronic device (101) (or DDI (230)) adjusts the grayscale values ​​of a portion of an image to be displayed through the light-emitting elements of the edges (421, 422, 423, 424), but the present disclosure is not limited thereto. For example, the rollable electronic device (101) (or DDI (230)) may display a correction image together with an image including the portion of the image to be displayed through the light-emitting elements of the edges (421, 422, 423, 424). For example, the correction image may be overlaid (or at least partially overlapped and displayed) with respect to the portion of the image to be displayed through the light-emitting elements of the edges (421, 422, 423, 424). For example, the correction image may include an image having a gradient effect.

[0073] For example, the DDI (230) can obtain the correction image from at least one processor (120) (e.g., AP). By displaying the correction image obtained from at least one processor (120) together with the image, the grayscale values ​​of the light-emitting elements of the edges (421, 422, 423, 424) can be adjusted. Alternatively, for example, the DDI (230) can also use the correction image stored in a memory (e.g., GRAM or sub-GRAM) within the DDI (230). By displaying the image including the image portion obtained from at least one processor (120) together with the correction image stored in the memory within the DDI (230), the grayscale values ​​of the light-emitting elements of the edges (421, 422, 423, 424) can be adjusted. At this time, the correction image may be changed according to the background color (or representative color) of the content within the image to be displayed through the display (210), the current brightness of the display (210) of the rollable electronic device (101), or the illuminance of the external environment. For example, when a change in the correction image is required, the DDI (230) may obtain the changed correction image from at least one processor (120). The DDI (230) may store the changed correction image in a memory within the DDI (230).

[0074] For example, the rollable electronic device (101) can lower the grayscale values ​​of light-emitting elements (or lines) having a specific color (e.g., R and B) of the first edge (421) (or the second edge (422)) and increase the grayscale values ​​of light-emitting elements (or lines) having a specific color (e.g., G) connected to the line. Alternatively, the rollable electronic device (101) can lower the grayscale values ​​of light-emitting elements (or lines) having a specific color (e.g., G) of the third edge (423) (or the fourth edge (424)) and increase the grayscale values ​​of light-emitting elements (or lines) having a specific color (e.g., R and B) connected to the line.

[0075] Also, referring to example (414), in the complete slide-out state (302), the first region (311) and the second region (312-3) of the display (210) may be visually exposed. For example, the first region (311) and the second region (312-3) may include a first edge (421), a second edge (422), a third edge (423), and a fourth edge (424). The length of the second edge (422) and the third edge (423) of example (414) may be longer than the length of the second edge (422) and the third edge (423) of example (411). In example (414), the DDI (230) of the rollable electronic device (101) can adjust the grayscale values ​​of the image portion to be displayed through the light-emitting elements of the edges (421, 422, 423, 424), among the images to be displayed at the edges (421, 422, 423, 424).

[0076] In examples (411) and (414), since movement of the housing part (e.g., the second housing (320) of FIG. 3) in the first direction (d1) is not identified, the display (210) may have a fixed size. Accordingly, the rollable electronic device (101) (or DDI (230)) can identify edges (421, 422, 423, 424) at which color fringes may occur. The rollable electronic device (101) (or DDI (230)) can remove the color fringes by performing image processing on the identified edges (421, 422, 423, 424). However, the rollable electronic device (101) may expand (or contract) the display (210) according to the movement of the housing part (e.g., the second housing (320) of FIG. 3) of the rollable electronic device (101) in the first direction (d1) (or the second direction (d2)). When the display (210) of the rollable electronic device (101) expands or contracts, the color fringe may not be removed because it is difficult to specify the part (or edge, corner) of the display (210) that is being changed.

[0077] Referring to example (412), as the housing part (e.g., the second housing (320) of FIG. 3) moves in the first direction (d1), the display (210) of the rollable electronic device (101) can substantially expand in the second direction (d2). For example, the second area (312-1) of the display (210) can be visually exposed. The second area (312-1) and the first area (311) can be distinguished by a boundary (430). For example, one end of the first area (311) that is visually exposed in the slide-in state (301) can include the boundary (430). In example (412), the rollable electronic device (101) (or DDI (230)) can remove color fringes by performing image processing because the positions of the first edge (421), the second edge (422), and the third edge (423) are fixed. However, while the state of the rollable electronic device (101) is changed (or while the display (210) is rolling (or expanding)), the rollable electronic device (101) may not be able to identify the light-emitting elements (or lines) positioned at the fourth edge (424). Accordingly, in example (412), color fringes may occur at the fourth edge (424) due to the light-emitting elements (or lines) having specific colors (e.g., R and B).

[0078] Also, referring to example (413), the display (210) of the rollable electronic device (101) can substantially expand in the second direction (d2) as the housing part (e.g., the second housing (320) of FIG. 3) moves in the first direction (d1). The size of the second region (312-2) of example (413) can be larger than the size of the second region (312-1) of example (412). In example (413), the rollable electronic device (101) (or DDI (230)) can remove color fringes by performing image processing because the positions of the first edge (421), the second edge (422), and the third edge (423) are fixed. However, while the state of the rollable electronic device (101) is changing (or while the display (210) is rolling (or expanding)), the rollable electronic device (101) may not be able to identify the light-emitting elements (or lines) located at the fourth edge (424). Accordingly, in the example (413), color fringes may occur at the fourth edge (424) due to the light-emitting elements (or lines) having a specific color (e.g., G).

[0079] Referring to examples (412) and (413), a color fringe may occur in a portion (e.g., a fourth edge (424)) of the display (210) (or the second region (312)) of the rollable electronic device (101) due to a color that changes as the display (210) expands. In other words, the rollable electronic device (101) may not be able to remove the color fringe by image processing while the display (210) expands (or contracts).

[0080] Hereinafter, the electronic device, method, and storage medium according to the present disclosure may display a gradient image to eliminate color fringes that occur while the housing (or housing part) of the rollable electronic device (101) moves (or while the display (210) expands (or contracts). For example, when the gradient image is displayed, the luminance viewed from the outside may taper from high luminance to low luminance. For example, the tapered luminance may be adjusted as the gradient image having grayscale values ​​that gradually change from high grayscale to low grayscale is displayed. Alternatively, the electronic device, method, and storage medium according to the present disclosure may include a gradient BM (black matrix) to eliminate color fringes that occur while the housing (or housing part) of the rollable electronic device (101) moves (or while the display (210) expands (or contracts). For example, the gradient BM may include a BM configured such that the transmittance of light gradually changes. Accordingly, the electronic device, method, and storage medium according to the present disclosure can remove the color fringe of the rolling portion that occurs during the rolling (or unrolling) of the rollable electronic device (101). Accordingly, the electronic device, method, and storage medium according to the present disclosure can improve the user experience by providing the user with a screen with the color fringe removed. For specific details on the method of using a gradient image to remove the color fringe, reference may be made to FIGS. 5 to 7B. For specific details on the method of using a gradient BM to remove the color fringe, reference may be made to FIGS. 8A to 10B.

[0081] FIG. 5 illustrates an example of a method for removing color fringes from a rollable electronic device using a gradation image.

[0082] FIG. 5 illustrates examples (501, 502, 503, 504) of a method for removing color fringes using a gradient image in the rollable electronic device (101) of FIG. 3. The display (210) of FIG. 5 may be a flexible display including the first region (311) and the second region (312) of FIG. 3.

[0083] Referring to FIG. 5, example (501) illustrates the display (210) in a slide-in state (301) of the rollable electronic device (101). In example (501), a first region (311) of the display (210) can be visually exposed. As time passes from example (501) to example (502), example (503), and example (504), the housing (e.g., the second housing (320) of FIG. 3) of the rollable electronic device (101) can be moved toward an extended position. Example (504) illustrates the display (210) in a fully slide-out state (302) of the rollable electronic device (101). In example (504), the first region (311) and the second region (312-3) of the display (210) can be visually exposed. Examples (502) and (503) illustrate the display (210) in a slide-out state (302) (or intermediate state) between examples (501) and (504). In example (502), the first region (311) and the second region (312-1) of the display (210) can be visually exposed, and in example (503), the first region (311) and the second region (312-2) of the display (210) can be visually exposed.

[0084] Referring to example (501), in the slide-in state (301), the first area (311) of the display (210) can be visually exposed. The size of the visually exposed display area (hereinafter, the first display area) (510) of the display (210) can correspond to the size of the first area (311). For example, the first display area (510) can be substantially the same as the first area (311). In example (501), the rollable electronic device (101) can perform image processing to improve (or, alleviate, reduce) color fringe. For example, at least one processor (or DDI (230)) of the rollable electronic device (101) can adjust the grayscale values ​​of the portion of the image to be displayed through the light-emitting elements of the edges (531, 532, 533, 534) among the images to be displayed at the edges (531, 532, 533, 534). For specific details related thereto, reference may be made to example (411) of FIG. 4B. For example, for specific details regarding the edges (531, 532, 533, 534), reference may be made to the details regarding the edges (421, 422, 423, 424) of FIG. 4B in a substantially identical manner.

[0085] Referring to example (502), the first region (311) and the second region (312-1) of the display (210) may be visually exposed while changing from the slide-in state (301) to the slide-out state (302). In example (502), the size of the first display region (510) may correspond to the sizes of the first region (311) and the second region (312-1). For example, the first display region (510) may be substantially the same as the first region (311) and the second region (312-1). In addition, the size of the peripheral region (520), which is an additional display region of the display (210), may correspond to the size of the second region (312-1). For example, the peripheral area (520) may be defined by a boundary (515) between a first display area (510) of a display (210) positioned outside (or visually exposed) of a housing of a rollable electronic device (101) and a second display area (not shown) of a display (210) positioned inside (or visually obscured) of a housing of a rollable electronic device (101). For example, the second display area may represent a display area corresponding to at least a portion of the display (210) positioned inside the housing of the rollable electronic device (101). For example, the peripheral area (520) may represent an area including an edge (e.g., line (552)) of the first display area (510) extending from the boundary (515). For example, the peripheral area (520) may be substantially identical to the second area (312-1). For example, the peripheral area (520) may represent a portion of the display (210) that is visually exposed according to movement of the second housing (320) of the rollable electronic device (101) in the first direction (d1) (or movement toward an extended position). For example, the peripheral area (520) may represent a virtual window to which a gradient image (550) will be applied (or displayed). For example, the peripheral area (520) may include a plurality of lines (551, 552).For example, the number of multiple lines (551, 552) can have a specified number.

[0086] For example, the rollable electronic device (101) can display a gradient image (550) in the peripheral area (520). At least one processor (or DDI (230)) of the rollable electronic device (101) can generate (or obtain) the gradient image (550). For example, the gradient image (550) can have grayscale values ​​that gradually change from a high grayscale value to a low grayscale value. For example, in order to display the gradient image (550), the grayscale value of the first line (551) among the lines (551, 552) in the peripheral area (520) can be higher than the grayscale value of the second line (552). A high grayscale value can indicate high luminance (or brightness). In other words, the rollable electronic device (101) can reduce the brightness of the peripheral area (520) by displaying a gradient image (550) while the second housing (320) of the rollable electronic device (101) moves toward the extended position. The reduction in brightness can be adjusted by taperring from high brightness to low brightness. For example, the first line (551) can be spaced apart from the boundary (515) between the first display area (510) and the second display area by a first distance. For example, the second line (552) can be spaced apart from the boundary (515) between the first display area (510) and the second display area by a second distance shorter than the first distance. For example, the brightness of the first line (551) can be higher than the brightness of the second line (552). The rollable electronic device (101) can eliminate (or prevent) color fringes that may occur in a portion of the peripheral area (520) (e.g., the fourth edge (534)) by displaying a gradient image (550).

[0087] Referring to example (503), while changing from a slide-in state (301) to a slide-out state (302), a first region (311) and a second region (312-2) of the display (210) may be visually exposed. The size of the second region (312-2) may be larger than the size of the second region (312-1). In example (503), the size of the first display region (510) may be larger than the size of the first region (311). For example, the size of the first display region (510) may correspond to the sizes of the first region (311) and the second region (312-2). For example, the first display region (510) may be substantially the same as the first region (311) and the second region (312-2). In addition, the peripheral region (520), which is an additional display region of the display (210), may correspond to the size of the region excluded from the second region (312-2) by the second region (312-1). For example, the peripheral region (520) may represent a portion of the display (210) that is visually newly exposed while the second housing (320) of the rollable electronic device (101) moves in the first direction (d1) (or moves toward an extended position) over time from example (502) to example (503).

[0088] For example, the rollable electronic device (101) can display a gradient image (550) in the peripheral area (520). At least one processor (or DDI (230)) of the rollable electronic device (101) can generate (or obtain) the gradient image (550). The rollable electronic device (101) can adjust the brightness of the peripheral area (520) by tapering from high brightness to low brightness by displaying the gradient image (550) while the second housing (320) of the rollable electronic device (101) moves toward the extended position. By displaying the gradient image (550), the rollable electronic device (101) can eliminate (or prevent) color fringe that may occur in a portion (e.g., the fourth edge (534)) of the peripheral area (520).

[0089] Referring to example (504), in the slide-out state (302), the first region (311) and the second region (312-3) of the display (210) may be visually exposed. In example (504), the size of the first display region (510) may correspond to the sizes of the first region (311) and the second region (312-3). In example (504), the peripheral region (520) may not be defined. In example (504), the rollable electronic device (101) may perform image processing to improve (or, alleviate, reduce) color fringe. For example, at least one processor (or DDI (230)) of the rollable electronic device (101) can adjust the grayscale values ​​of the portion of the image to be displayed through the light-emitting elements of the edges (531, 532, 533, 534) among the images to be displayed at the edges (531, 532, 533, 534). For specific details related thereto, reference may be made to the example (414) of FIG. 4B.

[0090] Referring to FIG. 5, the rollable electronic device (101) according to the present disclosure may display a gradient image (550) in the peripheral area (520) since it is difficult to accurately specify a line at which color fringes will occur while the state of the rollable electronic device (101) is changed. For example, displaying the gradient image (550) may be understood as displaying an image including a portion of the image to be displayed in the peripheral area (520) having adjusted grayscale values, or displaying a correction image that is at least partially overlapped (or overlaid) with the portion of the image to be displayed in the peripheral area (520). For example, the adjusted grayscale values ​​may be adjusted by the DDI (230) based on information acquired from at least one processor (120) (e.g., AP), or may be adjusted by the DDI (230) based on information directly identified by the DDI (230) (or acquired from a sensor). For example, the above correction image may be an image acquired together with the image from at least one processor (120) (e.g., AP) or an image stored in a memory within the DDI (230).

[0091] Accordingly, the rollable electronic device (101) can remove (or prevent) color fringes that may occur at the fourth edge (534) of the peripheral area (520). For example, the gradient image (550) to be displayed in the peripheral area (520) may include an image based on a specified setting value. For example, the specified setting value may include the shape of the boundary of the peripheral area (520) where the gradient image (550) starts to be displayed, the range (or number of lines) of the peripheral area (520) where the gradient image (550) is to be displayed, the color of the gradient image (550), and the transparency (or grayscale value, brightness) of the gradient image (550). In one example, the range (or number of lines) of the peripheral area (520) where the gradient image (550) is to be displayed may be determined based on at least one of the length of the glass window of the rollable electronic device (101), the angle of the direction of the gaze of the user using the rollable electronic device (101), the illuminance of the environment outside the rollable electronic device (101), or the brightness of the display (210) of the rollable electronic device (101). However, the present disclosure is not limited thereto. For example, the gradient image (550) may include an image based on a representative setting value of an image (or a main image, a background image) being displayed in an area (or remaining area) of the first display area (510) excluding the peripheral area (520). Alternatively, for example, the gradient image (550) may include an image based on a representative setting value of a setting of the rollable electronic device (101) or a running software application. For example, the gradient image (550) may include an animation. Specific details related to this are described in FIGS. 7a and 7b below.

[0092] FIG. 6 illustrates an example of an operational flow for a method of removing color fringes from a rollable electronic device using a gradient image.

[0093] At least some of the methods of FIG. 6 may be performed by the rollable electronic device (101) of FIGS. 4A and 4B. For example, at least some of the methods may be controlled by at least one processor of the rollable electronic device (101). Meanwhile, the following operations are described based on the at least one processor, but are not limited thereto. For example, at least some of the following operations may be controlled by the DDI (230) of the rollable electronic device (101). In the following embodiments, the operations may be performed sequentially, but are not necessarily performed sequentially. For example, the order of the operations may be changed, and at least two operations may be performed in parallel.

[0094] Referring to FIG. 6, in operation (600), the rollable electronic device (101) may perform a display on a visually exposed first display area (e.g., the first display area (510) of FIG. 5). For example, the rollable electronic device (101) may control a flexible display (e.g., the display (210) of FIG. 2) to perform the display on the first display area. For example, the display may include displaying an image through the first display area.

[0095] For example, the rollable electronic device (101) can perform the display on the first display area in a state where the housing part of the rollable electronic device (101) (e.g., the second housing (320) of FIG. 3) is stationary. Hereinafter, for convenience of explanation, the stationary state is described as an example in which the slide-in state (301) of FIG. 3 is used, but the present disclosure is not limited thereto. For example, the stationary state may include a completely slide-out state (302) or a partially slide-out state (302) (or an intermediate state).

[0096] In operation (610), the rollable electronic device (101) can identify a second housing part that is moved relative to the first housing part. For example, the rollable electronic device (101) can identify the second housing part that is moved relative to the first housing part toward an extended position of the housing. For example, the rollable electronic device (101) can identify the movement of the second housing part based on identifying the movement of an actuator (or motor) for moving the second housing part. For example, the first housing part can be an example of the first housing (310) of FIG. 3. For example, the second housing part can be an example of the second housing (320) of FIG. 3.

[0097] In operation (620), the rollable electronic device (101) may determine a peripheral area defined from a boundary between the first display area and the second display area and including a plurality of lines. For example, the rollable electronic device (101) may determine the peripheral area within a time interval set in relation to the identification of the second housing part being moved. For example, the time interval may include a timing at which the movement of the second housing part starts. For example, the time interval may represent a period of time during which the movement is maintained. For example, the rollable electronic device (101) may identify a location of a peripheral area (e.g., peripheral area (520) of FIG. 5), which is an additional display area that is visually exposed according to the movement of the second housing part, based on the movement (or rotational speed) of the actuator. For example, the peripheral area may be defined by a boundary (e.g., boundary (515) of FIG. 5) between the first display area exposed outside the housing of the rollable electronic device (101) and the second display area positioned within the housing. For example, the position of the peripheral area may include a position of a line that is visually exposed first among the lines of the peripheral area. For example, each of the lines of the second display area may be one of a line including R subpixels and B subpixels or a line including G subpixels.

[0098] In operation (630), the rollable electronic device (101) may obtain an image portion having grayscale values ​​that gradually change from a first grayscale value to a second grayscale value. For example, while performing identification of the second housing part that is moved, the rollable electronic device (101) may obtain the image portion having the grayscale values ​​that gradually change from the first grayscale value to the second grayscale value to be displayed in the peripheral area. For example, the image portion may be included in an image to be displayed in the flexible display (or the peripheral area of ​​the first display area). For example, the first grayscale value may have a higher value than the second grayscale value. For example, the first grayscale value may be referred to as a high grayscale value, and the second grayscale value may be referred to as a low grayscale value.

[0099] In one example, when the at least one processor of the rollable electronic device (101) obtains (or generates) the image portion, the at least one processor may provide the image including the image portion to the DDI (230). Alternatively, in one example, the DDI (230) of the rollable electronic device (101) may obtain (or generate) the image portion.

[0100] In operation (640), the rollable electronic device (101) may reduce the luminance of the peripheral region. For example, the rollable electronic device (101) may control the flexible display to reduce the luminance of the peripheral region within the time period. For example, the luminance of the peripheral region may be adjusted by tapering from a first luminance to a second luminance. For example, the rollable electronic device (101) may control the flexible display to adjust the luminance of the peripheral region, which is an additional display region, while performing identification of the second housing part that is moved. For example, the luminance may be tapered from the first luminance, which is a high luminance, to the second luminance, which is a low luminance.

[0101] For example, the luminance of a first line of the peripheral area spaced a first distance from the boundary between the first display area and the second display area may be higher than the luminance of a second line of the peripheral area spaced a second distance from the boundary, which is shorter than the first distance.

[0102] For example, the rollable electronic device (101) can control the flexible display to display the image including the image portion to be displayed in the peripheral area. For example, the rollable electronic device (101) can adjust the brightness of the peripheral area by displaying the image while performing identification of the second housing part to be moved.

[0103] In FIG. 6, an example of removing (or preventing) color fringes by using a gradient image (or a portion of the image) while the state of the rollable electronic device (101) changes from a slide-in state (301) to a slide-out state (302) is described, but the present disclosure is not limited thereto. For example, the present disclosure may remove (or prevent) color fringes by displaying a gradient image in the reduced second display area while the state of the rollable electronic device (101) changes from a slide-out state (302) to a slide-in state (301).

[0104] Additionally, although not described in FIG. 6, the rollable electronic device (101) can change the settings of the gradient image to be displayed in the second display area. Specific details related thereto are described below in FIGS. 7A and 7B.

[0105] Figures 7a and 7b illustrate examples of display areas in which gradient images are displayed.

[0106] FIG. 7A illustrates an example (700) of a peripheral area (e.g., peripheral area (520) of FIG. 5) where a gradient image is to be displayed. For example, the peripheral area may be an additional display area that is visually exposed according to movement of a second housing part (e.g., second housing (320) of FIG. 3) of the rollable electronic device (101) of FIG. 3. For example, the peripheral area may include an edge of a first display area defined (or extended) from a boundary (e.g., boundary (515) of FIG. 5) between a first display area (e.g., first display area (510) of FIG. 5) and a second display area.

[0107] Referring to example (700), the rollable electronic device (101) may include a first region (311) and a second region (312), which are flexible displays. In example (700), for convenience of explanation, the rollable electronic device (101) in a slide-out state (302) is illustrated. As the second housing part moves toward an extended position with respect to the first housing part (e.g., the first housing (310) of FIG. 3), the second region (312) may be gradually withdrawn from the interior of the rollable electronic device (101) (or the interior of the housing). For example, as the second housing part moves, a peripheral region (750) may be newly withdrawn (or visually exposed). For example, the peripheral region (750) may include a plurality of lines (751, 752, 753). However, the present disclosure is not limited thereto. For example, the peripheral area (750) may include one line.

[0108] For example, a gradient image to be displayed in a peripheral area (750) may include an image based on a specified setting value. For example, the specified setting value may indicate a setting value for a peripheral area (750) where the gradient image is to be displayed. For example, the specified setting value may include a shape of a boundary (or a first line (751)) between the peripheral area (750) of the first display area (740) and the remaining area, the number of lines (755) included in the peripheral area (750), a color of the gradient image to be displayed in the peripheral area (750), and transparency (or grayscale value, brightness) of the gradient image.

[0109] For example, the shape according to the above-mentioned specified setting value may include a straight line in the horizontal direction. For example, the number of lines (755) may include not only the lines of the peripheral area (750) that has started to be visually exposed, but also the lines of the second display area of ​​the second area (312) that has not been visually exposed. In other words, the gradient image may be displayed in a part of the second display area that has not been drawn out from the inside of the rollable electronic device (101). For example, the part of the second display area where the gradient image is displayed may be referred to as another peripheral area. For example, the another peripheral area may include an edge of the second display area that extends from a boundary (745) between the first display area (740) and the second display area.

[0110] For example, the color of the gradient image may include a designated color (e.g., black to white). For example, the transparency of the gradient image may be distributed in an equal ratio according to the number of lines (755). For example, when the number of lines (755) is 3, the first line (751) may have a transparency of 100% (or a grayscale value of 255), the second line (752) may have a transparency of 0% (or a grayscale value of 0), and the third line (753) may have a transparency of 50% (or a grayscale value of 128). The above examples are merely examples for the convenience of description, and the present disclosure is not limited thereto. In the above examples, an example in which a gradient image is displayed according to designated setting values ​​is described, but the present disclosure is not limited thereto.

[0111] For example, the rollable electronic device (101) can obtain a representative setting value by analyzing an image to be displayed in the first display area (740). For example, the rollable electronic device (101) can identify a representative setting value of the image by analyzing the image (or main image, background image) to be displayed in an area (or remaining area) different from the peripheral area (750) of the first display area (740). For example, the representative setting value may include a representative color of the image. For example, the rollable electronic device (101) can identify the representative color of the image as green. For example, the rollable electronic device (101) can set the color of the gradient image to be displayed in the peripheral area (750) to green. In the above example, an example is described in which the color of the gradient image to be displayed in the peripheral area (750) is determined based on the representative color of the image to be displayed in the remaining area of ​​the first display area (740), but the present disclosure is not limited thereto. For example, the shape of the border (or first line (751)), the number of lines (755), and transparency of the gradient image may be determined based on the image.

[0112] Additionally, for example, the rollable electronic device (101) can obtain representative setting values ​​associated with a software application. For example, the software application may include an application running in the foreground. However, the present disclosure is not limited thereto.

[0113] For example, the rollable electronic device (101) can identify a representative setting value of an image (or a main image, a background image) to be displayed in the first display area (740) (or the remaining area of ​​the first display area (740)) by analyzing the screen of the software application represented by the image (or the main image, the background image). Alternatively, for example, the rollable electronic device (101) can identify a specified color included in the identification information (or package information) of the software application as the representative setting value. For example, the representative setting value can include a representative color (or a background color) of the software application. For example, the rollable electronic device (101) can identify the representative color (or the background color) of the software application as blue. For example, the rollable electronic device (101) can set the color of a gradient image to be displayed in the peripheral area (750) to blue. In the above example, an example is described in which the color of the gradient image to be displayed in the peripheral area (750) is determined based on the representative color of the software application to be displayed in the first display area (740), but the present disclosure is not limited thereto. For example, the shape of the border (or first line (751)), the number of lines (755), and transparency of the gradient image may be determined based on the software application.

[0114] Alternatively, for example, the rollable electronic device (101) may determine whether to display a gradient image in the peripheral area (750) based on the settings of the rollable electronic device (101). For example, when the dark mode is activated in the rollable electronic device (101), the display of the gradient image in the peripheral area (750) may be deactivated. For example, the dark mode may include a function of providing a background screen having a dark color (e.g., black). However, the present disclosure is not limited thereto. For example, when the dark mode is activated, the rollable electronic device (101) may determine the color of the gradient image to be displayed in the peripheral area (750) to be black.

[0115] Alternatively, for example, the rollable electronic device (101) may determine whether to display a gradient image in the peripheral area (750) based on the speed of the second housing part (e.g., the second housing (320) of FIG. 3). For example, the rollable electronic device (101) may detect the speed of the second housing part based on the movement (or rotational speed) of an actuator (e.g., the actuator (815) of FIG. 8A). For example, the rollable electronic device (101) may determine whether to display a gradient image by comparing the speed with a reference speed. For example, the rollable electronic device (101) may obtain a gradient image having the grayscale values ​​that gradually change when the speed is less than the reference speed. Conversely, the rollable electronic device (101) may obtain an image having fixed grayscale values ​​when the speed is greater than or equal to the reference speed. For example, an image having the fixed grayscale values ​​may represent an image without a gradient effect applied. If the speed is fast, color fringes may not be recognized by the user. Therefore, if the speed is higher than the reference speed, the rollable electronic device (101) may refrain from (or omit) displaying the gradient image.

[0116] Alternatively, for example, the rollable electronic device (101) may display an animation in the peripheral area (750). For example, the animation may include successive images in which at least one of the shape of the border (or the first line (751)), the number of lines (755), the color, or the transparency of the gradient image is changed. For example, the rollable electronic device (101) may activate the display of the animation according to the settings of the rollable electronic device (101).

[0117] FIG. 7b illustrates an example (760) of a peripheral area (750) and an additional peripheral area (750a) of a display (780) of a rollable electronic device (101) on which a gradient image is to be displayed.

[0118] Referring to example (760), the rollable electronic device (101) may include a first housing (770), an actuator (775), a display (780), and a glass window (790). For example, the first housing (770) may be an example of the first housing (310) of FIG. 3. For example, the display (780) may be an example of the display (210) (or the first region (311) and the second region (312)) of FIG. 3. Although not shown in example (760) of FIG. 7B, the rollable electronic device (101) may include a second housing connected to the first housing (770). In one example, the glass window (790) may be referred to as a front housing, front glass, or front.

[0119] For example, the first housing (770) may include a first plate (771) positioned below the display (780) and a second plate (772) extending from the first plate (771). For example, the second plate (772) may extend in a direction substantially perpendicular to the first plate (771). However, the present disclosure is not limited thereto. For example, the first plate (771) and the second plate (772) may be implemented as a single plate.

[0120] For example, the first housing (770) may be connected to a glass window (790). For example, the second plate (772) of the first housing (770) may be connected to the glass window (790). In the above example, the first housing (770) and the glass window (790) are described as separate components, but the present disclosure is not limited thereto. For example, the glass window (790) may be implemented as a part of the first housing (770).

[0121] For example, at least a portion of the display (780) may be visually obscured from the exterior of the rollable electronic device (101) by the first housing (770). For example, the at least a portion may be retracted into the interior of the rollable electronic device (101) by being rolled by the actuator (775).

[0122] For example, the glass window (790) may include a BM layer (795). For example, the BM layer (795) may be disposed in an area of ​​the glass window (790) where the glass window (790) and the display (780) overlap with respect to the y-axis. For example, the BM layer (795) may be disposed (or included) on a lower surface of the glass window (790). For example, the BM layer (795) disposed on the lower surface may be spaced apart from the display (780) by a specified gap (785). For example, the BM layer (795) may be referred to as a gradient BM, a gradient area, a BM area, or a gradient window BM.

[0123] For example, the rollable electronic device (101) can display a gradient image in the peripheral area (750). For example, the peripheral area (750) can extend from the boundary of the display (780) covered by the glass window (790) when viewed in the +y-axis direction. For example, the boundary can be located between a first display area visually exposed from the outside of the rollable electronic device (101) and a second display area located inside the rollable electronic device (101). At this time, the boundary can be determined based on the length of the glass window (790). For example, the length of the glass window (790) can represent the length in the x-axis direction.

[0124] For example, the rollable electronic device (101) can display a gradient image in an additional peripheral region (750a) in addition to the peripheral region (750). For example, the additional peripheral region (750a) can be determined based on an angle of a user's gaze direction (765) of the rollable electronic device (101) and a designated interval (785). For example, the angle can be formed by the gaze direction (765) and the display (780). For example, as the angle decreases, the size of the additional peripheral region (750a) can expand. For example, as the designated interval (785) increases, the size of the additional peripheral region (750a) can expand.

[0125] Although not illustrated in the example (760) of FIG. 7b, the rollable electronic device (101) may further include a brush (not illustrated) for filtering foreign substances that may enter the rollable electronic device (101) through a designated gap (785). For example, the brush may be connected to the first housing (770) or the glass window (790).

[0126] In the example (760) of FIG. 7B, a case is described where the area (e.g., the peripheral area (750) and the additional peripheral area (750a)) where the gradient image is to be displayed changes depending on the angle of the user's gaze direction (765), but the present disclosure is not limited thereto. For example, the area (e.g., the peripheral area (750) and the additional peripheral area (750a)) where the gradient image is to be displayed may be determined based on at least one of the illuminance of the environment outside the rollable electronic device (101) or the brightness of the display (210) of the rollable electronic device (101), as described above.

[0127] FIGS. 8A to 8C illustrate examples of a method for removing color fringes in a rollable electronic device using a gradient BM (black matrix).

[0128] FIG. 8A illustrates an example (800) of a rollable electronic device (101) of FIG. 3 including a gradient BM. For example, the gradient BM may be used to adjust the transmittance of light emitted from light-emitting elements of the display. Accordingly, an image shown in an area of ​​the display where the gradient BM is disposed may be perceived by a user as a gradient image (550) in a peripheral area (520) of FIG. 5. In other words, color fringes may be eliminated (or prevented) in the display area where the gradient BM is disposed.

[0129] Referring to example (800), the rollable electronic device (101) may include a first housing (810), an actuator (815), a display (820), and a glass window (830). For example, the first housing (810) may be an example of the first housing (310) of FIG. 3. For example, the display (820) may be an example of the display (210) (or the first region (311) and the second region (312)) of FIG. 3. Although not shown in example (800) of FIG. 8A, the rollable electronic device (101) may include a second housing connected to the first housing (810). In one example, the glass window (830) may be referred to as a front housing, front glass, or front.

[0130] For example, the first housing (810) may include a first plate (811) positioned below the display (820) and a second plate (812) extending from the first plate (811). For example, the second plate (812) may extend in a direction substantially perpendicular to the first plate (811). However, the present disclosure is not limited thereto. For example, the first plate (811) and the second plate (812) may be implemented as a single plate.

[0131] For example, the first housing (810) may be connected to the glass window (830). For example, the second plate (812) of the first housing (810) may be connected to the glass window (830). In the above example, the first housing (810) and the glass window (830) are described as separate components, but the present disclosure is not limited thereto. For example, the glass window (830) may also be implemented as a part of the first housing (810).

[0132] For example, at least a portion of the display (820) may be visually obscured from the exterior of the rollable electronic device (101) by the first housing (810). For example, the at least a portion may be retracted into the interior of the rollable electronic device (101) by being rolled by the actuator (815).

[0133] For example, the glass window (830) may include a BM layer (840). For example, the BM layer (840) may be disposed in an area of ​​the glass window (830) where the glass window (830) and the display (820) overlap with respect to the y-axis. For example, the BM layer (840) may be disposed (or included) on a lower surface of the glass window (830). For example, the BM layer (840) disposed on the lower surface may be spaced apart from the display (820) by a specified gap (825). For example, the BM layer (840) may be referred to as a gradient BM, a gradient area, a BM area, or a gradient window BM.

[0134] For example, the BM layer (840) may include a first portion (841) and a second portion (842). For example, the first portion (841) may be used to adjust the transmittance of light emitted from the portion (821) of the display (820). For example, the portion (821) may be referred to as a peripheral region of the display (820) (e.g., peripheral region (520) of FIG. 5). For example, the second portion (842) may be used to block the transmission of light emitted from the portion (822) of the display (820). In other words, the first portion (841) may include a BM having a transmittance adjusted to allow at least a portion of the light emitted from the portion (821) to pass through. Alternatively, the second portion (842) may include a BM configured such that light emitted from the portion (822) is not visible from the outside. A specific example of a BM layer (840) including a first portion (841) and a second portion (842) may be referenced to FIG. 8b.

[0135] FIG. 8b illustrates examples of a BM layer (851) with a fixed light transmittance depending on position and a BM layer (852) with a variable light transmittance depending on position. The BM layer (852) may be an example of the BM layer (840) of FIG. 8a.

[0136] Referring to FIG. 8B, the BM layer (851) may include a BM whose light transmittance is lower than a reference transmittance, regardless of location. For example, the reference transmittance may represent a transmittance at which light transmission is blocked. Blocking light transmission may indicate that an image based on the light is not visible from the outside.

[0137] Alternatively, the BM layer (852) may include a first portion (852a) having variable light transmittance depending on location and a second portion (852b) having fixed light transmittance. For example, the first portion (852a) may be an example of the first portion (841) of FIG. 8A. For example, the second portion (852b) may be an example of the second portion (842) of FIG. 8A. For example, the first portion (852a) may include a BM whose transparency gradually changes. For example, as it gets closer to the edge (854) from the boundary (853) between the first portion (852a) and the second portion (852b), the first portion (852a) may include a BM having higher transparency. For example, the boundary (853) may be an example of a boundary (515) between a first display area (e.g., the first display area (510) of FIG. 5) and a second display area. For example, the edge (854) may be an edge of a BM layer (851) (or a glass window (830)). For example, the edge (854) may be an example of the first line (551) of FIG. 5.

[0138] Examples showing the extent to which light emitted from light-emitting elements when the BM layer (851) or BM layer (852) of FIG. 8b is used is visible from the outside may be referred to in FIG. 8c below.

[0139] FIG. 8c illustrates examples (860, 865) of a display (820) viewed from the outside of a rollable electronic device (101) including a BM layer (851) and examples (870, 875) of a display (820) viewed from the outside of a rollable electronic device (101) including a BM layer (852).

[0140] Example (860) illustrates a display (820) of a rollable electronic device (101) including a BM layer (851) disposed on a portion of an area (862). For example, a line composed of light-emitting elements having a G color among light-emitting elements of the display (820) may be positioned at the outermost edge within the area (862). Example (865) illustrates a display (820) of a rollable electronic device (101) including a BM layer (851) disposed on a portion of an area (867). For example, a line composed of light-emitting elements having a R / B color among light-emitting elements of the display (820) may be positioned at the outermost edge within the area (867). For example, the BM layer (851) may be disposed on a portion that does not overlap with a line having a G color (or an R / B color). Referring to the above, in example (860), color fringes may be caused by green, and in example (865), color fringes may be caused by magenta.

[0141] In contrast, example (870) illustrates a display (820) of a rollable electronic device (101) including a BM layer (852) disposed on a portion of an area (872). For example, a line composed of light-emitting elements having a G color among the light-emitting elements of the display (820) may be positioned at the outermost edge within the area (872). Example (875) illustrates a display (820) of a rollable electronic device (101) including a BM layer (852) disposed on a portion of an area (877). For example, a line composed of light-emitting elements having a R / B color among the light-emitting elements of the display (820) may be positioned at the outermost edge within the area (877). For example, the BM layer (852) may be disposed on a portion that at least partially overlaps a line having a G color (or an R / B color). For example, on the at least partially overlapping part of the above, a first portion (852a) of the BM layer (852) may be disposed. Referring to the above, in examples (870, 875), color fringes may be eliminated (or prevented) by gradually changing the light emitted from the light emitting elements by the first portion (852a) whose transmittance is gradually changed. The gradual change in the emitted light may indicate that the luminance of a display area of ​​the display (820) viewed from the outside (e.g., the peripheral area (520) of FIG. 5) tapers from high luminance to low luminance.

[0142] Referring back to example (800) of FIG. 8A, the rollable electronic device (101) can eliminate (or prevent) color fringes that may occur in a portion (821) of the display (820) (or lines corresponding to the portion (821)) by using a BM layer (840) including a first portion (841). When viewing the display (820) in the +y direction, the second portion (842) can be used as a bezel of the rollable electronic device (101). As the designated interval (825) increases, color fringes may be visible in the portions (821, 822) of the display (820) when viewed in a direction rotated at a certain angle from the +y direction. Accordingly, the rollable electronic device (101) of the present disclosure can also display a gradient image (or image portion) by performing processing on an image to be displayed in the portions (821, 822). For example, portion (821) may be referred to as a peripheral area of ​​a first display area, and portion (822) may be referred to as another peripheral area of ​​a second display area.

[0143] Although not illustrated in the example (800) of FIG. 8A, the rollable electronic device (101) may further include a brush (not illustrated) for filtering foreign substances that may enter the rollable electronic device (101) through a designated gap (825). For example, the brush may be connected to the first housing (810) or the glass window (830).

[0144] Figures 9a to 9c illustrate examples of gradient BM.

[0145] FIGS. 9A to 9C illustrate examples of a method for designing a BM layer (840) of FIG. 8A. For example, FIGS. 9A to 9C may illustrate examples of the structure of a first portion (841) of a BM layer (840). FIG. 9A illustrates an example (900) of a BM layer (910) using multiple partial layers. FIG. 9B illustrates an example (930) of a BM layer (940) using a material having different densities for each section. FIG. 9C illustrates an example (950) of a BM layer (960) using a material having different thicknesses for each section.

[0146] Referring to example (900) of FIG. 9a, the BM layer (910) may include a plurality of partial layers (911, 912, 913). The BM layer (910) of example (900) may be an example of the BM layer (840) (or the first partial (841)) of FIG. 8a.

[0147] For example, the BM layer (910) may include a first partial layer (911), a second partial layer (912), and a third partial layer (913). The number of partial layers illustrated in the example (900) is merely exemplary for convenience of explanation and the present disclosure is not limited thereto. For example, each of the partial layers may be formed of a material having the same density. For example, each of the first partial layer (911), the second partial layer (912), and the third partial layer (913) may be formed by applying black ink having the same density. At this time, in order to gradually change the transmittance of light, such as the first portion (841) of the BM layer (840), the partial layers of the BM layer (910) may have different lengths. For example, the length may represent the length in the x-axis direction. For example, the first partial layer (911) can be longer than the second partial layer (912) by a first spacing (921). For example, the second partial layer (912) can be longer than the third partial layer (913) by a second spacing (922). In example (900), the first spacing (921) is illustrated as being longer than the second spacing (922), but the present disclosure is not limited thereto. For example, the first spacing (921) can be equal to or shorter than the second spacing (922). As the number of stacked partial layers increases in the +x-axis direction, the BM layer (910) can gradually change its light transmittance (or transparency).

[0148] In example (900), the length (or thickness) of each of the partial layers of the BM layer (910) in the y-axis direction is shown to be the same, but the present disclosure is not limited thereto. For example, the length of each partial layer in the y-axis direction may be different from each other.

[0149] Referring to example (930) of FIG. 9B, the BM layer (940) may be composed of a material having different densities for each section. For example, with respect to the +x direction, a first section (941) of the BM layer (940) may include a material having a first density, a second section (942) may include a material having a second density, and a third section (943) may include a material having a third density. For example, the first density may be lower than the second density. For example, the second density may be lower than the third density. The density of the material may be related to the number (or size) of particles constituting the material. For example, a high density of the material may indicate low light transmittance (or transparency). For example, the material may include black ink.

[0150] Referring to example (950) of FIG. 9c, the BM layer (960) may be configured to have a different thickness of a material having the same density for each section. For example, the BM layer (960) may be configured of a material having the same density regardless of the position along the x-axis. For example, the BM layer (960) may have a first thickness (961) at a first position and a second thickness (962) at a second position. For example, the second thickness (962) may be thicker than the first thickness (961). For example, the thickness may be defined as a length in the y-axis direction. For example, a thicker material may indicate lower light transmittance (or transparency). For example, the material may include black ink.

[0151] Figures 10a and 10b illustrate examples of rollable electronic devices according to the direction of movement of the housing.

[0152] FIGS. 10A and 10B illustrate examples (1010, 1020, 1060, 1070) of the rollable electronic device (101) of FIG. 3 according to the direction in which the second housing part of the housing (e.g., the second housing (320) of FIG. 3) moves. FIG. 10A illustrates examples (1010, 1020) in which the second housing part moves in a vertical direction (or a vertical direction). FIG. 10B illustrates examples (1060, 1070) in which the second housing part moves in a horizontal direction (or a horizontal direction). For convenience of explanation, FIGS. 10A and 10B illustrate a case in which the housing (or display) of the rollable electronic device (101) is expanded, but the present disclosure is not limited thereto.

[0153] Referring to example (1010) of FIG. 10A, the second housing part of the rollable electronic device (101) can be moved in a first direction (d1). For example, the second housing part can be moved in the first direction (d1) while the state of the rollable electronic device (101) changes from a slide-in state (301) to a slide-out state (302). While the second housing part is moved in the first direction (d1) with respect to the first housing part, the display (210) of the rollable electronic device (101) can be substantially expanded in the second direction (d2). For example, a second area (e.g., the second area (312) of FIG. 3) of the display (210) can be expanded in the second direction (d2). For example, as the display (210) is expanded, a peripheral area (1015), which is an additional display area, can be visually exposed. At this time, to remove (or prevent) color fringe, a gradient image may be displayed in the peripheral area (1015) or a gradient BM may be placed on the peripheral area (1015).

[0154] Referring to example (1020) of FIG. 10A, the second housing part of the rollable electronic device (101) can be moved in the second direction (d2). For example, the second housing part can be moved in the second direction (d2) while the state of the rollable electronic device (101) is changed from a slide-in state (301) to a slide-out state (302). While the second housing part is moved in the second direction (d2) with respect to the first housing part, the display (210) of the rollable electronic device (101) can be substantially expanded in the first direction (d1). For example, a second area (e.g., the second area (312) of FIG. 3) of the display (210) can be expanded in the first direction (d1). For example, as the display (210) is expanded, a peripheral area (1025), which is an additional display area, can be visually exposed. At this time, to remove (or prevent) color fringe, a gradient image may be displayed in the peripheral area (1025) or a gradient BM may be placed on the peripheral area (1025).

[0155] The rollable electronic device (101) of the examples (1010, 1020) of FIG. 10a may be referred to as a vertical rollable electronic device. The display (210) of the vertical rollable electronic device may be referred to as a vertical rollable display.

[0156] Referring to example (1060) of FIG. 10B, the second housing part of the rollable electronic device (101) can be moved in a fourth direction (d4). For example, the second housing part can be moved in the fourth direction (d4) while the state of the rollable electronic device (101) changes from a slide-in state (301) to a slide-out state (302). While the second housing part is moved in the fourth direction (d4) with respect to the first housing part, the display (210) of the rollable electronic device (101) can be substantially expanded in the third direction (d3). An imaginary line connecting the third direction (d3) and the fourth direction (d4) can be perpendicular to another imaginary line connecting the first direction (d1) and the second direction (d2). For example, a second region (e.g., the second region (312) of FIG. 3) of the display (210) may be expanded in a third direction (d3). For example, as the display (210) expands, an additional display region, the peripheral region (1065), may be visually exposed. At this time, in order to eliminate (or prevent) color fringe, a gradient image may be displayed in the peripheral region (1065), or a gradient BM may be placed on the peripheral region (1065).

[0157] Referring to example (1070) of FIG. 10b, the second housing part of the rollable electronic device (101) can be moved in a third direction (d3). For example, the second housing part can be moved in the third direction (d3) while the state of the rollable electronic device (101) changes from a slide-in state (301) to a slide-out state (302). While the second housing part is moved in the third direction (d3) with respect to the first housing part, the display (210) of the rollable electronic device (101) can be substantially expanded in a fourth direction (d4). For example, a second area (e.g., the second area (312) of FIG. 3) of the display (210) can be expanded in the fourth direction (d4). For example, as the display (210) is expanded, a peripheral area (1075), which is an additional display area, can be visually exposed. At this time, to remove (or prevent) color fringe, a gradient image may be displayed in the peripheral area (1075) or a gradient BM may be placed on the peripheral area (1075).

[0158] The rollable electronic device (101) of the examples (1060, 1070) of FIG. 10b may be referred to as a horizontal rollable electronic device. The display (210) of the horizontal rollable electronic device may be referred to as a horizontal rollable display.

[0159] As described above, the electronic device, method, and storage medium according to the present disclosure may display a gradient image to eliminate color fringe caused while the housing (or housing part) of the rollable electronic device (101) moves (or while the display (210) expands (or contracts)). For example, when the gradient image is displayed, the luminance viewed from the outside may taper from high luminance to low luminance. For example, the tapered luminance may be adjusted as the gradient image having grayscale values ​​that gradually change from high grayscale to low grayscale is displayed. The electronic device, method, and storage medium according to the present disclosure may include a gradient BM to eliminate color fringe caused while the housing (or housing part) of the rollable electronic device (101) moves (or while the display (210) expands (or contracts)). For example, the gradient BM may include a BM configured such that the transmittance of light is gradually changed. Accordingly, the electronic device, method, and storage medium according to the present disclosure can eliminate color fringes of the rolling portion that occur during the rolling (or unrolling) of the rollable electronic device (101). Accordingly, the electronic device, method, and storage medium according to the present disclosure can improve the user experience by providing the user with a screen with color fringes removed.

[0160] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure belongs from the description below.

[0161] As described above, the rollable electronic device (101) may include a housing including a first housing part (310) and a second housing part (320) movably coupled to the first housing part (310) between a collapsed position and an expanded position. The rollable electronic device (101) may include a flexible display (210). The rollable electronic device (101) may include one or more storage media and a memory (130) storing instructions. The rollable electronic device (101) may include at least one processor (120) including a processing circuit. The instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to control the flexible display (210) to perform a display on a first display area of ​​the flexible display (210) located outside the housing. The instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to identify the second housing part (320) as being moved toward the extended position with respect to the first housing part (310). The instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to control the flexible display (210) to reduce the luminance of a peripheral area of ​​the first display area, defined by a boundary between the first display area and a second display area of ​​the flexible display (210) positioned within the housing, within a time interval set in relation to the identification.

[0162] In one embodiment, the luminance of the peripheral region can be adjusted by gradually changing from high luminance to low luminance. The luminance of a first line of the peripheral region, which is spaced a first distance from the boundary, can be higher than the luminance of a second line of the peripheral region, which is spaced a second distance from the boundary, which is shorter than the first distance.

[0163] According to one embodiment, the instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to, in response to the identification, determine the peripheral area including lines of the first display area extending from the boundary. Each of the lines may be one of a line including red (R) sub-pixels and blue (B) sub-pixels and a line including green (G) sub-pixels.

[0164] According to one embodiment, the rollable electronic device (101) may further include a display driving circuit. The instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to, in response to the identification, obtain an image portion having grayscale values ​​that gradually change from a high grayscale value to a low grayscale value, to be displayed on the determined peripheral area. The instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to, in response to the identification, provide an image including the obtained image portion, to be displayed through the flexible display (210), to the display driving circuit. The above instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to control the display driving circuit to display the image within the time period. Displaying the image may cause adjustment of the luminance of the peripheral area.

[0165] According to one embodiment, the rollable electronic device (101) may further include a display driving circuit. The instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to control the display driving circuit to obtain an image portion having grayscale values ​​that gradually change from a high grayscale value to a low grayscale value, to be displayed on the determined peripheral area, in response to the identification. The instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to control the display driving circuit to display an image including the obtained image portion, to be displayed through the flexible display (210) within the time period. Displaying the image may cause adjustment of the luminance of the peripheral area.

[0166] According to one embodiment, the grayscale values ​​of the image portion may have a designated color, or may have a representative color of another image portion that is different from the image portion among the image portions and is to be displayed in the first display area, or may have a representative color of a software application associated with the image.

[0167] In one embodiment, the image portion having the gradually changing grayscale values ​​can be used to display an animation.

[0168] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to detect a velocity of the second housing part (320) moving toward the extended position with respect to the first housing part (310). The instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to obtain the image portion having the gradually changing grayscale values ​​when the velocity is less than a reference velocity. The instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to obtain the image portion having fixed grayscale values ​​when the velocity is greater than or equal to the reference velocity.

[0169] According to one embodiment, the instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to identify the second housing part (320) moving toward the collapsed position relative to the first housing part (310) after movement of the second housing part (320) has ceased. The instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to control the flexible display (210) to reduce the luminance of the peripheral area of ​​the first display area within another time interval set in relation to the identification of the second housing part (320) moving toward the collapsed position.

[0170] According to one embodiment, the instructions, when individually or collectively executed by the at least one processor (120), may cause the rollable electronic device (101) to control the flexible display (210) to reduce the luminance of another peripheral area of ​​the second display area extending from the boundary within the time interval.

[0171] In one embodiment, the luminance of the other peripheral region can be adjusted by gradually changing from high luminance to low luminance. The luminance of a first line of the other peripheral region, which is spaced a first distance from the boundary, can be higher than the luminance of a second line of the other peripheral region, which is spaced a second distance from the boundary, which is shorter than the first distance.

[0172] According to one embodiment, the rollable electronic device (101) may further include a glass window (830) connected to the first housing part (310) and spaced apart from the flexible display (210) by a specified gap. The glass window (830) may include a black matrix (BM) layer (840) disposed above the peripheral area, which is an additional display area of ​​the flexible display (210) that is visually exposed according to the second housing part (320) moving with respect to the first housing part (310). The BM layer (840) may include a first part (841) disposed above the peripheral area and a second part (842) extending from the first part (841). The first portion (841) may be configured such that the light transmittance gradually increases in a direction from the boundary between the first portion (841) and the second portion (842) toward the first portion (841). The BM layer (840) may include a first portion (841) disposed on the peripheral area and a second portion (842) extending from the first portion (841). The first portion (841) may be configured such that the light transmittance gradually increases in a direction from the boundary between the first portion (841) and the second portion (842) toward the first portion (841).

[0173] According to one embodiment, the second portion (842) may have a light transmittance that is less than the reference transmittance.

[0174] According to one embodiment, the first portion (841) may be configured such that the light transmittance gradually increases based on the number of partial layers within the first portion (841), or may be configured such that the light transmittance gradually increases based on the density of the material of the first portion (841).

[0175] Referring to the above, a method performed by a rollable electronic device (101) including a housing including a first housing part (310) and a second housing part (320) movably coupled to the first housing part (310) between a collapsed position and an expanded position and a flexible display (210) may include an operation of controlling the flexible display (210) to perform a display on a first display area of ​​the flexible display (210) positioned outside the housing. The method may include an operation of identifying the second housing part (320) as being moved toward the expanded position with respect to the first housing part (310). The method may include an operation of controlling the flexible display (210) to reduce the luminance of a peripheral area of ​​the first display area, defined by a boundary between the first display area and a second display area of ​​the flexible display (210) positioned within the housing, within a time period set in relation to the identification.

[0176] In one embodiment, the luminance of the peripheral region can be adjusted by gradually changing from high luminance to low luminance. The luminance of a first line of the peripheral region, which is spaced a first distance from the boundary, can be higher than the luminance of a second line of the peripheral region, which is spaced a second distance from the boundary, which is longer than the first distance.

[0177] In one embodiment, the method may include, in response to the identification, determining the peripheral area including lines of the first display area extending from the boundary. Each of the lines may be one of a line including red (R) sub-pixels and blue (B) sub-pixels or a line including green (G) sub-pixels.

[0178] According to one embodiment, the rollable electronic device (101) may further include a display driving circuit. The method may include, in response to the identification, an operation of acquiring an image portion having grayscale values ​​that gradually change from a high grayscale value to a low grayscale value, to be displayed in the determined peripheral area. The method may include, in response to the identification, an operation of providing an image including the acquired image portion, to be displayed through the flexible display (210), to the display driving circuit. The method may include an operation of controlling the display driving circuit to display the image within the time period. The display of the image may cause an adjustment of the luminance of the peripheral area.

[0179] According to one embodiment, the rollable electronic device (101) may further include a display driving circuit. The method may include, in response to the identification, controlling the display driving circuit to obtain an image portion having grayscale values ​​that gradually change from a high grayscale value to a low grayscale value, to be displayed in the determined peripheral area. The method may include controlling the display driving circuit to display an image including the obtained image portion, to be displayed through the flexible display (210) within the time interval. Displaying the image may cause adjustment of the luminance of the peripheral area.

[0180] As described above, a non-transitory computer-readable storage medium may store one or more programs including instructions that, when individually or collectively executed by at least one processor (120) of a rollable electronic device (101) including a housing including a first housing part (310) and a second housing part (320) movably coupled to the first housing part (310) between a collapsed position and an expanded position, cause the flexible display (210) to perform a display on a first display area of ​​the flexible display (210) located outside the housing. The non-transitory computer-readable storage medium may store one or more programs including instructions that, when individually or collectively executed by at least one processor (120), cause the second housing part (320) to be moved toward the expanded position with respect to the first housing part (310). The non-transitory computer-readable storage medium may store one or more programs including instructions that, when executed individually or collectively by at least one processor (120), cause the flexible display (210) to control the flexible display (210) to reduce the luminance of a peripheral area of ​​the first display area, defined from a boundary between the first display area and a second display area of ​​the flexible display (210) positioned within the housing, within a time interval set in relation to the identification.

[0181] Electronic devices according to the various embodiments disclosed in this document may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to the embodiments of this document are not limited to the aforementioned devices.

[0182] The various embodiments of this document and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0183] The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0184] Various embodiments of the present document may be implemented as software (e.g., a program (140)) including one or more instructions stored in a storage medium (e.g., an internal memory (136) or an external memory (138)) readable by a machine (e.g., an electronic device (101)). For example, a processor (e.g., a processor (120)) of the machine (e.g., an electronic device (101)) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0185] According to one embodiment, the method according to various embodiments disclosed in the present document may be provided as a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) via an application store (e.g., Play Store™) or directly between two user devices (e.g., smart phones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0186] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. In a rollable electronic device (101), A housing comprising a first housing part (310) and a second housing part (320) movably coupled to the first housing part (310) between a reduced position and an extended position; Flexible display (210); A memory (130) including one or more storage media and storing instructions; and At least one processor (120) including a processing circuit, The above instructions, when individually or collectively executed by the at least one processor (120), cause the rollable electronic device (101) to: Controlling the flexible display (210) to perform display on a first display area of ​​the flexible display (210) located outside the housing; Identifying the second housing part (320) that moves toward the extended position with respect to the first housing part (310); and Causing the flexible display (210) to be controlled to reduce the brightness of a peripheral area of ​​the first display area, defined from a boundary between the first display area and a second display area of ​​the flexible display (210) located within the housing, within a time period set in relation to the above identification. Rollable electronic device (101).

2. In claim 1, The luminance of the above peripheral area is adjusted by gradually changing from high luminance to low luminance, and The luminance of the first line of the peripheral area spaced a first distance from the boundary is higher than the luminance of the second line of the peripheral area spaced a second distance shorter than the first distance from the boundary. Rollable electronic device (101).

3. In claim 2, The above instructions, when individually or collectively executed by the at least one processor (120), cause the rollable electronic device (101) to: In response to said identification, cause said peripheral area to be determined, said peripheral area including lines of said first display area extending from said boundary; Each of the above lines is one of a line including R (red) sub-pixels and B (blue) sub-pixels and a line including G (green) sub-pixels. Rollable electronic device (101).

4. In claim 3, The above-mentioned rollable electronic device (101) further includes a display driving circuit, The above instructions, when individually or collectively executed by the at least one processor (120), cause the rollable electronic device (101) to: In response to the above identification, an image portion having grayscale values ​​that gradually change from high grayscale values ​​to low grayscale values ​​is obtained, which is to be displayed on the determined peripheral area; In response to the above identification, an image including the acquired image portion to be displayed through the flexible display (210) is provided to the display driving circuit; and To cause the display driving circuit to be controlled to display the image within the above time period, The display of the above image causes an adjustment of the luminance of the above surrounding area, Rollable electronic device (101).

5. In claim 3, The above-mentioned rollable electronic device (101) further includes a display driving circuit, The above instructions, when individually or collectively executed by the at least one processor (120), cause the rollable electronic device (101) to: In response to the above identification, controlling the display driving circuit to obtain an image portion having grayscale values ​​that gradually change from a high grayscale value to a low grayscale value to be displayed on the determined peripheral area; and To cause the display driving circuit to be controlled to display an image including the acquired image portion to be displayed through the flexible display (210) within the above time period, The display of the above image causes an adjustment of the luminance of the above surrounding area, Rollable electronic device (101).

6. In claim 4, The grayscale values ​​of the above image portion are: have a specified color, or Among the above images, the image portion is different from the above image portion and has a representative color of another image portion to be displayed in the first display area, or, having a representative color of the software application related to the above image, Rollable electronic device (101).

7. In claim 4, The image portion having the grayscale values ​​that are gradually changed is used to display an animation. Rollable electronic device (101).

8. In claim 4, The above instructions, when individually or collectively executed by the at least one processor (120), cause the rollable electronic device (101) to: Detecting the speed of the second housing part (320) moving toward the extended position with respect to the first housing part (310); If the speed is less than the reference speed, obtaining the image portion having the grayscale values ​​that are gradually changed; and If the speed is greater than the reference speed, causing the image portion having fixed grayscale values ​​to be obtained, Rollable electronic device (101).

9. In claim 1, The above instructions, when individually or collectively executed by the at least one processor (120), cause the rollable electronic device (101) to: After the movement of the second housing part (320) is stopped, the second housing part (320) is identified as being moved toward the reduced position with respect to the first housing part (310); and Causing the flexible display (210) to be controlled to reduce the brightness of the peripheral area of ​​the first display area within another time interval set in relation to the identification of the second housing part (320) moving toward the reduced position. Rollable electronic device (101).

10. In claim 1, The above instructions, when individually or collectively executed by the at least one processor (120), cause the rollable electronic device (101) to: Within the above time interval, causing the flexible display (210) to be controlled to reduce the brightness of another peripheral area of ​​the second display area extending from the boundary, Rollable electronic device (101).

11. In claim 10, The luminance of the above other surrounding areas is adjusted by gradually changing from high luminance to low luminance, and The luminance of the first line of the other peripheral area spaced apart from the boundary by a first distance is higher than the luminance of the second line of the other peripheral area spaced apart from the boundary by a second distance shorter than the first distance. Rollable electronic device (101).

12. In claim 1, The above-mentioned rollable electronic device (101) further includes a glass window (830) connected to the first housing part (310) and spaced apart from the flexible display (210) by a specified gap, The glass window (830) includes a BM (black matrix) layer (840) disposed above the peripheral area, which is an additional display area of ​​the flexible display (210) that is visually exposed according to the second housing part (320) that moves with respect to the first housing part (310). The BM layer (840) includes a first portion (841) disposed on the peripheral area and a second portion (842) extending from the first portion (841), and The first part (841) is configured such that the transmittance of light gradually increases along the direction from the boundary between the first part (841) and the second part (842) toward the first part (841). Rollable electronic device (101).

13. In claim 12, The second part (842) has a light transmittance less than the standard transmittance. Rollable electronic device (101).

14. A method performed by a rollable electronic device (101) including a housing and a flexible display (210) including a first housing part (310) and a second housing part (320) movably coupled to the first housing part (310) between a reduced position and an extended position, An operation of controlling the flexible display (210) to perform a display on a first display area of ​​the flexible display (210) located outside the housing; An operation of identifying the second housing part (320) that moves toward the expanded position with respect to the first housing part (310); and An operation of controlling the flexible display (210) to reduce the brightness of a peripheral area of ​​the first display area, defined from a boundary between the first display area and a second display area of ​​the flexible display (210) located within the housing, within a time period set in relation to the above identification. method.

15. A non-transitory computer-readable storage medium, when executed individually or collectively by at least one processor (120) of a rollable electronic device (101) including a housing and a flexible display (210), the housing including a first housing part (310) and a second housing part (320) movably coupled to the first housing part (310) between a collapsed position and an expanded position: Controlling the flexible display (210) to perform display on a first display area of ​​the flexible display (210) located outside the housing; Identifying the second housing part (320) that moves toward the extended position with respect to the first housing part (310); and Storing one or more programs including instructions that cause the flexible display (210) to control the flexible display (210) to reduce the brightness of a peripheral area of ​​the first display area, defined from a boundary between the first display area and a second display area of ​​the flexible display (210) located within the housing, within a time interval set in relation to the identification. Non-transitory computer-readable storage medium.

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