Charging device and method for charging wearable device, and non-transitory computer-readable storage medium

Abstract

This charging device may comprise a first interface, a second interface, a memory for storing instructions, and at least one processor including processing circuitry. The instructions may cause the charging device to acquire a first critical level of charge and acquire a second critical level of charge, the second critical level of charge being higher than the first critical level of charge. The instructions may cause the charging device to identify a battery level of a first wearable device to provide power to the first wearable device and provide power to a second wearable device on the basis of identifying that the battery level of the first wearable device is lower than the first critical level of charge, and to provide power only to the second wearable device on the basis of identifying that the battery level is not lower than the first critical level of charge.

Description

Charging device, method, and non-transient computer-readable storage medium for charging a wearable device

[0001] The present disclosure relates to a charging device, a method, and a non-transient computer-readable storage medium for charging a wearable device.

[0002] A wearable device can be worn on a user's body to operate. The wearable device may include a battery. The wearable device can provide services without being connected to an external power source by utilizing power supplied through the battery. To improve the overall user experience, it is desirable to improve the speed and efficiency of charging the wearable devices, particularly when the charging device is configured to charge multiple wearable devices.

[0003] The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure.

[0004] A charging device is provided. The charging device may include a first interface for connecting to a first wearable device. The charging device may include a second interface for connecting to a second wearable device. The charging device may include a memory that stores instructions and includes one or more storage media. The charging device may include at least one processor that includes processing circuitry. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the charging device to obtain a first threshold charge level corresponding to the first wearable device using the first interface. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the charging device to obtain a second threshold charge level corresponding to the second wearable device using the second interface. The above instructions, when executed individually or collectively by the at least one processor, may cause the charging device to provide power to the first wearable device through the first interface and to provide power to the second wearable device through the second interface, based on the determination that the battery level of the first wearable device identified using the first interface is smaller than the first threshold charge level, based on identifying the second threshold charge level which is greater than the first threshold charge level.The above instructions, when executed individually or collectively by the at least one processor, may cause the charging device to provide power through the second interface only to the second wearable device among the first wearable device and the second wearable device, based on the determination that the battery level is not smaller than the first threshold charge level, by identifying the second threshold charge level which is greater than the first threshold charge level.

[0005] A method is provided. The method may be performed in a charging device having a first interface for connecting to a first wearable device and a second interface for connecting to a second wearable device. The method may include an operation of obtaining a first threshold charge level corresponding to the first wearable device using the first interface. The method may include an operation of obtaining a second threshold charge level corresponding to the second wearable device using the second interface. The method may include an operation of providing power to the first wearable device through the first interface and providing power to the second wearable device through the second interface, based on a determination that the battery level of the first wearable device identified using the first interface is smaller than the first threshold charge level, based on identifying the second threshold charge level which is greater than the first threshold charge level. The above method may include an operation of providing power through the second interface only to the second wearable device among the first wearable device and the second wearable device, based on the determination that the battery level is not smaller than the first threshold charge level, by identifying the second threshold charge level which is greater than the first threshold charge level.

[0006] A non-transient computer-readable storage medium is provided. The non-transient computer-readable storage medium may store one or more programs. The one or more programs may include instructions that cause the charging device to obtain a first threshold charge level corresponding to the first wearable device using the first interface when executed by the charging device having a first interface for connecting to a first wearable device and a second interface for connecting to a second wearable device. The one or more programs may include instructions that cause the charging device to obtain a second threshold charge level corresponding to the second wearable device using the second interface when executed by the charging device. The above one or more programs may include instructions that cause the charging device to provide power to the first wearable device through the first interface and to provide power to the second wearable device through the second interface, based on a determination that the battery level of the first wearable device identified using the first interface is smaller than the first threshold charge level, when executed by the charging device based on identifying the second threshold charge level which is larger than the first threshold charge level. The above one or more programs may include instructions that cause the charging device to provide power to only the second wearable device among the first wearable device and the second wearable device through the second interface, based on a determination that the battery level is not smaller than the first threshold charge level, when executed by the charging device based on identifying the second threshold charge level which is larger than the first threshold charge level.

[0007] A charging device is provided. The charging device may include a first interface for connecting to a first wearable device. The charging device may include a second interface for connecting to a second wearable device. The charging device may include a memory that stores instructions and includes one or more storage media. The charging device may include at least one processor that includes processing circuitry. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the charging device to obtain a first threshold charge level corresponding to the first wearable device using the first interface. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the charging device to obtain a second threshold charge level corresponding to the second wearable device using the second interface. The second threshold charge level may be greater than the first threshold charge level. The above instructions may cause the charging device to identify the battery level of the first wearable device when executed individually or collectively by the at least one processor. The above instructions may cause the charging device to provide power to the first wearable device through the first interface and to provide power to the second wearable device through the second interface based on identifying that the battery level of the first wearable device is less than the first threshold charge level when executed individually or collectively by the at least one processor.The above instructions, when executed individually or collectively by the at least one processor, may cause the charging device to provide power only to the second wearable device through the second interface based on identifying that the battery level of the first wearable device is not lower than the first threshold charge level.

[0008] A method is provided. The method may be performed in a charging device having a first interface for connecting to a first wearable device and a second interface for connecting to a second wearable device. The method may include an operation of obtaining a first threshold charge level corresponding to the first wearable device using the first interface. The method may include an operation of obtaining a second threshold charge level corresponding to the second wearable device using the second interface. The second threshold charge level may be greater than the first threshold charge level. The method may include an operation of identifying a battery level of the first wearable device. The method may include an operation of providing power to the first wearable device through the first interface and providing power to the second wearable device through the second interface, based on identifying that the battery level of the first wearable device is less than the first threshold charge level. The above method may include an operation of providing power to only the second wearable device through the second interface based on identifying that the battery level of the first wearable device is not lower than the first threshold charge level.

[0009] A non-transient computer-readable storage medium is provided. The non-transient computer-readable storage medium may store one or more programs. The one or more programs may include instructions that cause the charging device to obtain a first threshold charge level corresponding to the first wearable device using the first interface when executed by the charging device having a first interface for connecting to a first wearable device and a second interface for connecting to a second wearable device. The one or more computer programs may include instructions that cause the charging device to obtain a second threshold charge level corresponding to the second wearable device using the second interface when executed by the charging device. The second threshold charge level may be greater than the first threshold charge level. The charging device may include instructions that cause the charging device to identify the battery level of the first wearable device. The one or more computer programs described above may include instructions that cause the charging device to provide power to the first wearable device through the first interface and to provide power to the second wearable device through the second interface, based on identifying that the battery level of the first wearable device is less than the first threshold charge level when executed by the charging device. The one or more computer programs described above may include instructions that cause the charging device to provide power only to the second wearable device through the second interface, based on identifying that the battery level of the first wearable device is not less than the first threshold charge level when executed by the charging device.

[0010] The subject matter according to the present disclosure can be best understood by referring to the accompanying drawings:

[0011] FIG. 1 is a block diagram of an electronic device in a network environment;

[0012] FIG. 2 illustrates a simplified block diagram of an exemplary charging device;

[0013] FIG. 3 illustrates an example of a charging device connected to wearable devices;

[0014] FIG. 4 illustrates examples of operations of a charging device for providing power to wearable devices;

[0015] FIG. 5a illustrates an example of battery information received from a wearable device;

[0016] FIG. 5b illustrates examples of operations of a charging device for determining a critical charge level;

[0017] FIG. 6 illustrates exemplary graphs representing the state of a wearable device being charged by a charging device;

[0018] FIG. 7 illustrates examples of operations of a charging device that charges wearable devices while acquiring external power;

[0019] FIG. 8 illustrates examples of operations of a charging device for charging wearable devices while not acquiring external power;

[0020] FIG. 9 illustrates examples of other operations of a charging device for charging wearable devices while not acquiring external power;

[0021] FIG. 10 illustrates an example of a charging device configured to provide power obtained from a first wearable device to a second wearable device; and

[0022] FIG. 11 illustrates an example of a first wearable device for charging wearable devices using a charging device.

[0023] The terms used in this disclosure are used merely to describe specific embodiments and are not intended to limit the scope of other embodiments. A singular expression may include a plural expression unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art described in this disclosure. Terms used in this disclosure that are defined in a general dictionary may be interpreted as having the same or similar meaning as they have in the context of the relevant technology, and are not to be interpreted in an ideal or overly formal sense unless explicitly defined in this disclosure. In some cases, even terms defined in this disclosure are not to be interpreted to exclude the embodiments of this disclosure.

[0024] In the various embodiments of the present disclosure described below, a hardware-based approach is described as an example. However, since the various embodiments of the present disclosure include techniques using both hardware and software, the various embodiments of the present disclosure do not exclude a software-based approach.

[0025] Terms used in the following description to refer to data (e.g., data, information, battery information), terms referring to values ​​(e.g., reference time, reference charge level, critical charge level, critical SOC (state of charge)), terms for operation states (e.g., operation, process), terms referring to network entities, terms referring to device components, etc., are exemplary terms for the convenience of explanation. Accordingly, the present disclosure is not limited to the exemplary terms used below, and other terms having equivalent technical meanings may be used.

[0026] Additionally, in this disclosure, expressions of "greater than" or "less than" may be used to determine whether a specific condition is satisfied or fulfilled; however, this is merely for the purpose of expressing an example and does not exclude descriptions of "greater than" or "less than." Conditions described as "greater than" may be replaced with "greater than," conditions described as "less than" may be replaced with "less than," and conditions described as "greater than and less than" may be replaced with "greater than and less than." Furthermore, "A" to "B" below refer to at least one of elements from A (including A) to B (including B). Below, "C" and / or "D" refers to including at least one of "C" or "D," i.e., {"C", "D", "C" and "D"}.

[0027] Figure 1 is a block diagram of an electronic device in a network environment.

[0028] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) through a first network (198) (e.g., a short-range wireless communication network) or with at least one of an electronic device (104) or a server (108) through 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) through a server (108). According to one embodiment, the electronic device (101) may include a processor (120), memory (130), input module (150), sound output module (155), display module (160), audio module (170), sensor module (176), interface (177), connection terminal (178), haptic module (179), camera module (180), power management module (188), battery (189), communication module (190), subscriber identification module (196), or antenna module (197). In some embodiments, at least one of these components (e.g., connection terminal (178)) may be omitted from the electronic device (101), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (176), camera module (180), or antenna module (197)) may be integrated into a single component (e.g., display module (160)).

[0029] The processor (120) can control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) by executing software (e.g., a program (140)), and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (120) can store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in volatile memory (132), process the commands or data stored in volatile memory (132), and store the resulting data in 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 an auxiliary processor (123) that can operate independently or together with it (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, if the electronic device (101) includes a main processor (121) and an auxiliary processor (123), the auxiliary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a designated function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as part thereof.

[0030] The auxiliary processor (123) may control at least some of the functions or states associated with at least one component of the electronic device (101) (e.g., display module (160), sensor module (176), or communication module (190)) 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. According to one embodiment, the auxiliary processor (123) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (180) or communication module (190)). According to one embodiment, the auxiliary processor (123) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or through a separate server (e.g., server (108)). The learning algorithm may 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 may include a plurality of artificial neural network layers.An artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), 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 the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0031] The memory (130) can store various data used by at least one component of the electronic device (101) (e.g., processor (120) or sensor module (176)). The data may include, for example, input data or output data for software (e.g., program (140)) and related commands. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0032] The program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0033] The input module (150) can receive commands or data to be used for a component of the electronic device (101) (e.g., processor (120)) from outside the electronic device (101) (e.g., user). The input module (150) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0034] The sound output module (155) can output a sound signal to the outside of the electronic device (101). The sound output module (155) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0035] The display module (160) can visually provide information to an external (e.g., 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 said device. According to 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 the force generated by said touch.

[0036] The audio module (170) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150) or output sound through the sound output module (155) or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphones) connected directly or wirelessly to the electronic device (101).

[0037] The sensor module (176) can detect the operating state of the electronic device (101) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (176) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0038] The interface (177) may support one or more specified protocols that can be used for the electronic device (101) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (102)). According to 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.

[0039] The connection terminal (178) may include a connector through which the electronic device (101) can 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).

[0040] The haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (179) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0041] The camera module (180) can capture still images and video. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0042] 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 part of a power management integrated circuit (PMIC).

[0043] The battery (189) can supply power to at least one component of the electronic device (101). According to one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0044] The communication module (190) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an 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 include one or more communication processors that operate independently of the processor (120) (e.g., application processor) and 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., cellular communication module, short-range wireless communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (104) through a first network (198) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (199) (e.g., 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 may 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 identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (196).

[0045] The wireless communication module (192) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The wireless communication module (192) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (192) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), 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), external electronic device (e.g., electronic device (104)), or network system (e.g., 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 realizing eMBB, loss coverage (e.g., 164 dB or less) for realizing mMTC, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for realizing URLLC.

[0046] An antenna module (197) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module (197) may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to 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 a first network (198) or a second network (199), may be selected from the plurality of antennas, for example, by a 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. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (197).

[0047] 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 to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0048] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0049] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) through 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 performed on the electronic device (101) may be performed on one or more of the external electronic devices (102, 104, or 108). For example, if the electronic device (101) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (101) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or 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 provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (101) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (104) or the server (108) may be included within 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.

[0050] FIG. 2 illustrates a simplified block diagram of an exemplary charging device (201). For example, the charging device (201) may represent an electronic device used to charge a wearable device (e.g., the first wearable device (301) and the second wearable device (302) of FIG. 3). The charging device (201) of FIG. 2 may be an example of the electronic device (101) of FIG. 1.

[0051] Referring to FIG. 2, the charging device (201) may include at least one processor (200), memory (210), power input circuit (220), battery (230), power management integrated circuit (PMIC) (240), first interface (251), and / or second interface (252). For example, at least one processor (200), memory (210), power input circuit (220), battery (230), power management integrated circuit (PMIC) (240), first interface (251), and / or second interface (252) may be electrically and / or operably coupled with each other by a communication bus.

[0052] Here, the hardware components being operatively coupled may mean that a direct or indirect connection between the hardware components is established via wired or wireless means so that a second hardware component can be controlled by a first hardware component. Although the hardware components illustrated in FIG. 2 are illustrated in different blocks, the present disclosure is not limited thereto. For example, some of the hardware components illustrated in FIG. 2 (e.g., at least one processor (200), memory (210), and at least a portion of the PMIC (240)) may be included in a single integrated circuit such as an SoC or a SIP (system in package). The type and / or number of hardware components included in the charging device (201) are not limited to those illustrated in FIG. 2. For example, the charging device (201) may include only some of the hardware components illustrated in FIG. 2.

[0053] At least one processor (200) may include a hardware component for processing data based on executing instructions. At least one processor (200) may be configured to execute instructions stored in memory (210) individually or collectively. At least one processor (200) may include a processing circuit. For example, the hardware component for processing data may include an arithmetic and logic unit (ALU), a floating point unit (FPU), and a field programmable gate array (FPGA). For example, the hardware component for processing data may include a central processing unit (CPU), a graphic processing unit (GPU), a display processing unit (DPU), a neural processing unit (NPU), a digital signal processor (DSP), an application processor (AP), and / or a microcontroller (MCU). At least one processor (200) may include one or more cores. For example, at least one processor (200) may have the structure of a multi-core processor such as a dual core, quad core, or hexa core. The description of the processor (120) of FIG. 1 may also apply to at least one processor (200) of FIG. 2. At least one processor (200) may be configured to control memory (210), power input circuit (220), battery (230), PMIC (240), first interface (251), and / or second interface (252).

[0054] Memory (210) may include a hardware component for storing data and / or instructions that are input to and / or output from at least one processor (200). Memory (210) may include one or more storage media. Memory (210) may include volatile memory, such as random-access memory (RAM), and / or non-volatile memory, such as read-only memory (ROM). Volatile memory may include at least one of, for example, dynamic RAM (DRAM), static RAM (SRAM), cache RAM, or pseudo SRAM (PSRAM). Non-volatile memory may include at least one of, for example, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), flash memory, hard disk, compact disk, or embedded multimedia card (EMMC). The description of the memory (130) in Fig. 1 may also be applied to the memory (210) in Fig. 2.

[0055] According to one embodiment, within the memory (210) of the charging device (201), one or more instructions (or commands) representing operations and / or operations to be performed on data by at least one processor (200) of the charging device (201) may be stored. A set of one or more instructions may be referred to as a program, firmware, operating system, process, routine, sub-routine and / or application. The charging device (201) illustrated in the description of FIG. 2 may be configured to execute at least some of the operations illustrated in the descriptions of FIG. 3 through 10. For example, the operations illustrated in the descriptions of FIG. 3 through 10 may be caused by (or within) the charging device (201) under the control of at least one processor (200).

[0056] The power input circuit (220) may be used to obtain external power (or power). The charging device (201) may receive or obtain power for driving the charging device (201) and / or at least one processor (200) when an external electronic device (e.g., wired interface (261), wireless interface (262)) is connected through the power input circuit (220). The power input circuit (220) may include at least a portion of the interface (177) of FIG. 1.

[0057] According to one embodiment, the power input circuit (220) may include a universal serial bus (USB) port. For example, the charging device (201) may obtain external power through the USB port that is provided (or received, or supplied, or delivered, or distributed, or applied) through the wired interface (261). For example, charging of the battery (230) (or charging device (201)) based on the wired interface (261) and the power input circuit (220) (e.g., USB port) may be referred to as wired charging or wired charging method. For example, the wired interface (261) may include a travel adapter. For example, the wired interface (261) may be referred to as a wired charger.

[0058] According to one embodiment, the power input circuit (220) may include an antenna for wireless inductive charging. For example, the charging device (201) may obtain external power through the antenna that is provided (or received, or supplied, or transmitted, or distributed, or applied) through the wireless interface (262). For example, charging of the battery (230) (or charging device (201)) based on the wireless interface (262) and the power input circuit (220) (e.g., antenna for wireless charging) may be referred to as wireless charging or a wireless charging method. For example, the wireless interface (262) may be referred to as a wireless charger. The antenna may be referred to as a WPC (wireless power consortium) antenna and / or a coil.

[0059] The battery (230) may be used to provide power for driving hardware components within the charging device (201). The battery (230) may store power (e.g., energy) provided from outside the charging device (201) through the power input circuit (220). In an example, but not limited to, the battery (230) may be used to provide power to a wearable device (e.g., the first wearable device (301) and the second wearable device (302) of FIG. 3). According to one embodiment, the battery (230) may include at least one cell. According to one embodiment, the battery (230) may be rechargeable. The description of the battery (189) of FIG. 1 may also apply to the battery (230) of FIG. 2.

[0060] The PMIC (240) may include a processor for managing the power of the battery (230). The PMIC (240) may provide, deliver, distribute, apply, or supply power to other hardware components included in the charging device (201) based on the power provided to the PMIC (240). The PMIC (240) may control the battery (230) to store energy. Storing energy in the battery (230) from an external power source may be referred to as charging the battery (230) (or charging the charging device (201)). The PMIC (240) may provide power (or power signals) for driving the hardware components. For example, at least one processor (200) may operate based on the power received from the PMIC (240). According to one embodiment, external power provided through the power input circuit (220) may be applied to the hardware components after being regulated by the PMIC (240).

[0061] According to one embodiment, the PMIC (240) may be used to provide power obtained from the battery (230) to components within the charging device (201) (e.g., at least one processor (200), memory (210), first interface (251), and / or second interface (252)) under the control of at least one processor (200). In FIG. 2, the PMIC (240) and at least one processor (200) are shown as separate hardware components, but the present disclosure is not limited thereto. For example, the PMIC (240) may be included within at least one processor (200). The power management module (188) of FIG. 1 may also be applied to the PMIC (240).

[0062] The first interface (251) may include a connector (or connection pin, or connection terminal) capable of physically connecting the charging device (201) and an external electronic device (e.g., the first wearable device (301) and the second wearable device (302) of FIG. 3). For example, the first interface (251) may include an electrically conductive pin. For example, the first interface (251) may include a pogo pin. The description of the connection terminal (178) of FIG. 1 may also apply to the first interface (251).

[0063] The second interface (252) may correspond to or match the first interface (251). For example, the second interface (252) may form a pair with the first interface (251). For example, the second interface (252) may be substantially identical to the first interface (251). For the second interface (252), descriptions of the first interface (251) may be referenced.

[0064] FIG. 3 illustrates an example of a charging device (201) connected to wearable devices (e.g., a first wearable device (301) and a second wearable device (302)). In the present disclosure, providing power may include supplying power, delivering power, and / or applying power. Additionally, in the present disclosure, battery level may be referred to as the charge amount of the battery, the state of charge (SOC) of the battery, the charge level of the battery, and / or other terms having an equivalent technical meaning. In practice, battery level refers to the current battery level, i.e., the battery level at a specific point in time.

[0065] Referring to FIG. 3, the charging device (201) of FIG. 3 may include the charging device (201) of FIG. 2. The charging device (201) may include a power input circuit (220), a PMIC (240), a battery (230), a first interface (251), and / or a second interface (252).

[0066] The charging device (201) can obtain external power through the power input circuit (220). For example, the charging device (201) can obtain external power from the wired interface (261) through the power input circuit (220). For example, the charging device (201) can obtain external power from the wireless interface (262) through the power input circuit (220). The power input circuit (220) can be configured to provide (or input) external power (or external voltage) to the PMIC (240). The power input circuit (220) can be connected to the PMIC (240).

[0067] The PMIC (240) can obtain external power through the power input circuit (220). The PMIC (240) may include a charge controller (310), an interface controller (311), a bypass terminal (321), a battery terminal (322), and / or an input terminal (323). The PMIC (240) can provide the external power obtained through the power input circuit (220) to the charge controller (310). The power input circuit (220) may be connected to the charge controller (310).

[0068] A charge controller (310) may be used to control the battery (230) and to manage the charge status of the battery (230). The charge controller (310) may prevent overcharging and / or over-discharging of the battery (230) by regulating the battery level of the battery (230), the battery voltage of the battery (230), and / or the battery current of the battery (230). The charge controller (310) may stop charging the battery (230) based on identifying errors related to the charging of the battery (230). The charge controller (310) may be connected to the battery (230). A charging device (201) may charge the battery (230) using the charge controller (310) within the PMIC (240). The charge controller (310) may provide acquired external power to the battery (230) through the battery terminal (322). The battery terminal (322) can be used to transmit power (or external power) between the charge controller (310) and the battery (230). The battery (230) can be charged with the provided external power.

[0069] The interface controller (311) may be an interface for providing (or transmitting) data (or electrical signals) to external electronic devices (e.g., a first wearable device (301), a second wearable device (302)) and / or providing power to external electronic devices. The interface controller (311) may be connected to the first wearable device (301) via the first interface (251). The PMIC (240) may receive battery information of the first wearable device (301) via the first interface (251) using the interface controller (311). The interface controller (311) may be connected to the second wearable device (302) via the second interface (252). The PMIC (240) may receive battery information of the second wearable device (302) via the second interface (252) using the interface controller (311). The PMIC (240) can use the interface controller (311) to provide or transmit information related to the charging device (201) to the first wearable device (301) through the first interface (251). The PMIC (240) can use the interface controller (311) to provide or transmit information related to the charging device (201) to the second wearable device (302) through the second interface (252).

[0070] According to one embodiment, the PMIC (240) can provide power obtained from the input terminal (323) to the first wearable device (301) through the first interface (251) by controlling the interface controller (311). The PMIC (240) can provide power obtained from the input terminal (323) to the second wearable device (302) through the second interface (251) by controlling the interface controller (311). The input terminal (323) may be connected to the bypass terminal (321) and / or the battery (230). For example, the input terminal (323) may be connected to the bypass terminal (321) while the power input circuit (220) is obtaining external power. The interface controller (311) can obtain external power from the power input circuit (220) by connecting the input terminal (323) and the bypass terminal (321). The PMIC (240) can provide or input external power obtained through the power input circuit (220) to the interface controller (311).

[0071] According to one embodiment, the PMIC (240) may provide the acquired external power to the bypass terminal (321). For example, the bypass terminal (321) may be connected to the power input circuit (220). The bypass terminal (321) may be configured to provide the provided external power to the input terminal (323). For example, the bypass terminal (321) may be connected to the input terminal (323) under the control of the PMIC (240) (or at least one processor (200)). For example, the PMIC (240) may provide the external power to the input terminal (323) connected through the bypass terminal (321) by bypassing the provision of the acquired external power to the charge controller (310). The input terminal (323) may be configured to provide the external power to the interface controller (311).

[0072] According to one embodiment, a charging device (201) (e.g., at least one processor (200)) may control the PMIC (240) to bypass providing external power to the charging controller (310) based on identifying that the first wearable device (301) is connected to the first interface (251) and / or that the second wearable device (302) is connected to the second interface (252). By bypassing the provision of external power to the charging controller (310), the PMIC (240) may provide external power obtained through the power input circuit (220) to the bypass terminal (321). By providing external power to the bypass terminal (321), the PMIC (240) may provide external power to the interface controller (311) connected to the input terminal (323).

[0073] According to one embodiment, the input terminal (323) may be connected to the battery (230) while the power input circuit (220) is not obtaining external power. The interface controller (311) may obtain power from the battery (230) by connecting the input terminal (323) to the battery (230) (or battery terminal (322)). The PMIC (240) may provide or input power to the interface controller (311) using the battery (230).

[0074] Each of the first wearable device (301) and the second wearable device (302) may be worn on a part of a user's body. For example, the part of the body may include the user's ear or the external auditory canal of the ear. For example, the first wearable device (301) may be worn on the user's ear, and the second wearable device (301) may be worn on the user's other ear. For example, the first wearable device (301) and the second wearable device (302) may be referred to as earbuds, earphones, and / or headsets. Each of the first wearable device (301) and the second wearable device (302) may be an example of the electronic device (101) of FIG. 1.

[0075] The first wearable device (301) and the second wearable device (302) may be formed of a pair of wearables. At least some of the hardware components of the first wearable device (301) may be substantially identical to at least some of the hardware components of the second wearable device (302). Here, the description of the first wearable device (301) may also apply to the second wearable device (302), and redundant or repetitive descriptions may be omitted to reduce repetition.

[0076] The first wearable device (301) may include a PMIC (330), a battery (332), and / or a system input terminal (333). The PMIC (330) may include a charge controller (331). The PMIC (330) may be a processor for managing the power of the battery (332). The PMIC (330) may be used to provide power obtained from a charge device (201) to each of the components within the first wearable device (301) under the control of a processor of the first wearable device (301) (e.g., at least one processor (1100) of FIG. 11). As an example not limited to, the PMIC (330) may be used to provide power obtained from a battery (332) to each of the components within the first wearable device (301) under the control of a processor of the first wearable device (301) (e.g., at least one processor (1100) of FIG. 11). The PMIC (330) may be connected to a system input terminal (333). The system input terminal (333) may be connected to hardware components of the first wearable device (301). The PMIC (330) may be used to provide power to each of the components within the first wearable device (301) by providing power (or voltage) to the system input terminal (333). The PMIC (330) may be equivalent to or substantially identical to the PMIC (240) of FIG. 2 and / or FIG. 3. For the PMIC (330), the descriptions of the PMIC (240) in FIG. 2 and / or FIG. 3 may be referenced.

[0077] A charge controller (331) may be used to control the battery (332) and to manage the charge status of the battery (332). By controlling the charging and / or discharging of the battery (332), the charge controller (331) may prevent overcharging and / or over-discharging of the battery (332). The charge controller (331) may stop charging the battery (332) based on identifying errors related to the charging of the battery (332). The charge controller (331) may be connected to the battery (332). The first wearable device (301) may charge the battery (332) using the charge controller (331) within the PMIC (330). The charge controller (331) may be equivalent to or substantially identical to the charge controller (310) of the charging device (201).

[0078] The battery (332) may be used to provide power for driving hardware components within the first wearable device (301). The first wearable device (301) may obtain power (or voltage) from the charging device (201). The first wearable device (301) may store the obtained power in the battery (332) using the PMIC (330). The battery (332) may be rechargeable. The description of the battery (189) in FIG. 1 may be applied substantially the same to the battery (332).

[0079] The second wearable device (302) may include a PMIC (340), a battery (342), and / or a system input terminal (343). The PMIC (340) may be equivalent to or substantially identical to the PMIC (330) of the first wearable device (301). For the PMIC (340), descriptions of the PMIC (330) may be referenced. The battery (342) may be equivalent to or substantially identical to the battery (332) of the first wearable device (301). For the battery (342), descriptions of the battery (332) may be referenced. The system input terminal (343) may be equivalent to or substantially identical to the system input terminal (333) of the first wearable device (301). For the system input terminal (343), descriptions of the system input terminal (333) may be referenced.

[0080] Among the first wearable device (301) and the second wearable device (302), one with a relatively high frequency of use may be determined as the primary device, and among the first wearable device (301) and the second wearable device (302), one with a relatively low frequency of use may be determined as the secondary device. For example, the first wearable device (301) may be determined as the secondary device, and the second wearable device (302) may be determined as the primary device. A charging device (201) or another device may perform the above determination. The charging device (201) may execute a method of charging the second wearable device (302) determined as the primary device preferentially over the first wearable device (301) determined as the secondary device. The charging device (201) may implement a method of charging the second wearable device (302), determined as the primary-use device, faster than the first wearable device (301), determined as the secondary-use device. Such a method will be described and illustrated in FIG. 4, FIG. 5a, FIG. 5b, FIG. 6, FIG. 7, FIG. 8, FIG. 9, FIG. 10, and / or FIG. 11.

[0081] FIG. 4 illustrates examples of operations of a charging device (e.g., charging device (201)) for providing power to wearable devices (e.g., first wearable device (301), second wearable device (302)). Providing power may include supplying power, delivering power, and / or applying power. Additionally, in the present disclosure, battery level may be referred to as the charge amount of the battery, the state of charge (SOC) of the battery, and / or other terms having an equivalent technical meaning.

[0082] Referring to FIG. 4, in operation 401, a charging device (201) (e.g., at least one processor (200)) can obtain, determine, or identify a first threshold charge level corresponding to a first wearable device (301) using a first interface (e.g., a first interface (251)). The first threshold charge level can be described as a target battery level by which the charging device (201) charges the battery (e.g., battery (332)) of the first wearable device (301). For example, the charging device (201) can target the first threshold charge level by providing power to the first wearable device (301) until the battery level of the battery (332) reaches the first threshold charge level.

[0083] The charging device (201) can be connected to the first wearable device (301) through the first interface (251). While the charging device (201) is connected to the first wearable device (301), it can obtain first battery information from the first wearable device (301). While the charging device (201) is connected to the first wearable device (301), it can periodically obtain first battery information. Based on the obtained first battery information, the charging device (201) can obtain, determine, or identify a first threshold charge level. The first battery information may represent information (e.g., battery level) related to the battery (e.g., battery (332)) of the first wearable device (301). The charging device (201) can store the charging time of the first wearable device (301). The charging device (201) can store the time during which power is provided to the first wearable device (301) through the first interface (251). The charging device (201) can store the time until the battery (332) of the first wearable device (301) is fully charged by providing power to the first wearable device (301). The charging device (201) can acquire, determine, or identify the first cumulative charging time using the stored time. The charging device (201) can determine the first threshold charging level as the first cumulative charging time is longer. In effect, the first threshold charging level may change according to the first cumulative charging time. For example, the charging device (201) can determine or acquire the first threshold charging level based on the time interval during which power is provided to the first wearable device (301) through the first interface (251). The charging device (201) acquiring a first threshold charging level will be described and illustrated with reference to FIGS. 5a and FIGS. 5b.

[0084] In operation 403, a charging device (201) (e.g., at least one processor (200)) may obtain, determine, or identify a second threshold charge level corresponding to a second wearable device (302) using a second interface (e.g., a second interface (252)). The second threshold charge level may be described as a target battery level by which the charging device (201) charges the battery (e.g., battery (342)) of the second wearable device (302). For example, the charging device (201) may target the second threshold charge level by providing power to the second wearable device (302) until the battery level of the battery (342) reaches the second threshold charge level.

[0085] The charging device (201) can be connected to the second wearable device (302) through the second interface (252). While connected to the second wearable device (302), the charging device (201) can obtain second battery information from the second wearable device (302). While connected to the second wearable device (302), the charging device (201) can periodically obtain second battery information. Based on the obtained second battery information, the charging device (201) can obtain, determine, or identify a second threshold charge level. The second battery information may represent information (e.g., battery level) related to the battery (e.g., battery (342)) of the second wearable device (302). The charging device (201) can store the charging time of the second wearable device (302). The charging device (201) can store the time during which power is provided to the second wearable device (302) through the second interface (252). The charging device (201) can store the time until the battery (342) of the second wearable device (302) is fully charged by providing power to the second wearable device (302). The charging device (201) can obtain, determine, or identify the second cumulative charging time using the stored time. The charging device (201) can determine the second threshold charging level as the second cumulative charging time is longer. In fact, the second threshold charging level may change depending on the second cumulative charging time. For example, the charging device (201) can determine or obtain the second threshold charging level based on the time interval during which power is provided to the second wearable device (302) through the second interface (252). The charging device (201) acquiring a second threshold charging level will be described and illustrated with reference to FIGS. 5a and FIGS. 5b.

[0086] In operation 405, a charging device (201) (e.g., at least one processor (200)) may compare a first threshold charging level and a second threshold charging level. For example, the charging device (201) may identify the larger of the two charging levels as the second threshold charging level. For example, in response to identifying the second threshold charging level, the charging device (201) may determine the first wearable device (301) as a secondary device and the second wearable device (302) as a primary device. That the second charging level is greater than the first charging level indicates that the frequency of use of the second wearable device (302) determined as the primary device is higher than the frequency of use of the first wearable device (301) determined as the secondary device.

[0087] In operation 407, a charging device (201) (e.g., at least one processor (200)) can identify whether the battery level of the first wearable device (301) exceeds a first threshold charge level. The battery level of the first wearable device (301) may represent the charge amount of the battery (332) of the first wearable device (301). The battery level of the first wearable device (301) may correspond to the state of charge (SOC) of the battery (332). The charging device (201) can identify the battery level based on battery information. The identification of the battery level by the charging device (201) based on battery information will be described and illustrated in detail with reference to FIGS. 5a and FIGS. 5b. The charging device (201) may execute operation 409 based on a determination that the battery level of the first wearable device (301) exceeds a first threshold charging level (or is not less than the first threshold charging level, or is not lower than the first threshold charging level). The charging device (201) may execute operation 411 based on a determination that the battery level of the first wearable device (301) does not exceed a first threshold charging level (or is less than the first threshold charging level, or is lower than the first threshold charging level).

[0088] According to one embodiment, in operation 407, comparing the battery level of the first wearable device (301) with the first threshold charge level may include comparing the battery voltage of the battery (332) of the first wearable device (301) with the first threshold battery voltage. The first threshold battery voltage may correspond to the first threshold charge level. According to one embodiment, in operation 407, comparing the battery level of the first wearable device (301) with the first threshold charge level may include comparing the state of charge (SOC) of the battery (332) of the first wearable device (301) with the first threshold SOC. For example, the charging device (201) may compare the SOC of the battery (332) of the first wearable device (301) with the first threshold SOC. The first threshold SOC may correspond to the first threshold charge level. The first threshold SOC can be described as the SOC of the target battery (332) by the charging device (201) charging the battery (332) of the first wearable device (301).

[0089] In operation 409, a charging device (201) (e.g., at least one processor (200)) may provide power through the second interface (252) only to the second wearable device (302) among the first wearable device (301) and the second wearable device (302), depending on the determination that the battery level of the first wearable device (301) exceeds a first threshold charge level (or is not less than the first threshold charge level, or is not lower than the first threshold charge level). For example, the charging device (201) may charge only the second wearable device (302) among the first wearable device (301) and the second wearable device (302). For example, the charging device (201) may electrically connect only the second wearable device (302) among the first wearable device (301) and the second wearable device (302) to a power input circuit (e.g., power input circuit (220)). For example, the charging device (201) may connect the second wearable device (302) to the power input circuit (220) instead of connecting the first wearable device (301) to the power input circuit (220). For example, the charging device (201) may disconnect the first wearable device (301) from the power input circuit (220) and connect the second wearable device (302) to the power input circuit (220) through a second interface (252). For example, the charging device (201) can establish a charging connection between the second wearable device (302) and the power input circuit (220) without a charging connection between the first wearable device (301) and the power input circuit (220). For example, the charging device (201) may refrain from or block providing power to the first wearable device (301) and provide power to the second wearable device (302) through the second interface (252). In this way, since power is not provided to the first wearable device (301), the amount of power to be provided to the second wearable device (302) may be increased.In fact, the amount of power provided to the second wearable device (302) in operation 409 may be greater than the amount (or size) of power provided to the second wearable device (202) in operation 411 to be described later. This may also increase the charging speed of the second wearable device (302) in operation 409. In fact, the charging speed of the second wearable device (302) in operation 409 is faster than the charging speed of the second wearable device (302) in operation 411 to be described later.

[0090] According to one embodiment, the charging device (201) can increase the amount (or magnitude) of power to be provided to the second wearable device (302) by bypassing the provision of power to the first wearable device (301). In this way, the amount (or magnitude) of power provided to the second wearable device (202) in operation 409 is greater than the amount (or magnitude) of power provided to the second wearable device (202) in operation 411 to be described later. For example, the charging device (201) can provide external power (e.g., obtained through the power input circuit (220)) provided to the interface controller (e.g., interface controller (311)) only to the second wearable device (302) through the second interface (252).

[0091] In operation 411, a charging device (201) (e.g., at least one processor (200)) may provide power to the first wearable device (301) through a first interface (251) and provide power to the second wearable device (302) through a second interface (252), depending on a determination that the battery level of the first wearable device (301) does not exceed a first threshold charge level (or is less than the first threshold charge level, or is lower than the first threshold charge level). In this way, the charging device (201) may charge the first wearable device (301) and charge the second wearable device (302). For example, the charging device (201) can connect the first wearable device (301) and the power input circuit (220) through the first interface (251) and connect the second wearable device (302) and the power input circuit (220) through the second interface (252). For example, the charging device (201) can provide power to the first wearable device (301) through the first interface (251) and provide power to the second wearable device (302) through the second interface (252).

[0092] According to one embodiment, the amount (or size) of power provided to the second wearable device (202) in operation 411 is smaller than the amount (or size) of power provided to the second wearable device (202) in operation 409. The charging device (201) can distribute external power (e.g., obtained through a power input circuit (220)) provided to an interface controller (e.g., interface controller (311)) to the first wearable device (301) and the second wearable device (302).

[0093] According to one embodiment, the charging device (201) can charge the second wearable device (302), determined as the primary-use device, preferentially over the first wearable device (301), determined as the secondary-use device, by performing the operations of FIG. 4. The frequency of use of the primary-use device is greater than the frequency of use of the secondary-use device. By charging the second wearable device (302), determined as the primary-use device, preferentially over the first wearable device (301), determined as the secondary-use device, the charged time (e.g., available time) of the wearable device (301) perceived by the user can be increased. This is because the device used more frequently (i.e., the second wearable device (302)) is charged faster to a second threshold charging level before the charging of the device used less frequently (i.e., the first wearable device (301)) begins. The charging device (201) can provide an enhanced user experience.

[0094] FIG. 5a illustrates an example of battery information (500) (e.g., the first battery information and the second battery information of FIG. 3) received from a wearable device (e.g., the first wearable device (301), the second wearable device (302)). A charging device (e.g., the charging device (201)) can obtain the battery information (500) from the wearable device (e.g., the first wearable device (301), the second wearable device (302)) through an interface (e.g., the first interface (251), the second interface (252)). According to one embodiment, the charging device (201) can obtain the battery information (500) using power line communication (PLC) technology. For example, PLC can be described as a communication technology that transmits data through a power line. For example, the battery information (500) may be included within a PLC packet and may be obtained therefrom.

[0095] Referring to FIG. 5a, the battery information (500) may include information of a first type (510), information of a second type (520), and / or information of a third type (530).

[0096] According to one embodiment, the information of the first type (510) may include a header. The header may include 4 bits of data. For example, the header of the information of the first type (510) may include the binary number '0010'. For example, the header of the information of the first type (510) may include the hexadecimal number '0x2'. A wearable device (e.g., a first wearable device (301), a second wearable device (302)) may provide, transmit, or deliver the information of the first type (510) to a charging device (201) in response to identifying that it is connected to a charging device (201). The charging device (201) may acquire or receive the information of the first type (510) through an interface (e.g., a first interface (251), a second interface (252)). The information of the first type (510) may include data indicating the state of the wearable device. The state of the wearable device may include the state of the wearable device's battery (e.g., battery (332), battery (342)). For example, the information of the first type (510) may include a full charge data (511), a safety timer (513), a temperature state (515), and / or a battery voltage code (517). The full charge data (511) may indicate whether the wearable device's battery (e.g., battery (332), battery (342)) is fully charged. The full charge data (511) may include 1 bit of data. The full charge data (511) may be referred to as 'SOC 100'. The safety timer (513) may indicate whether a safety function is running on the wearable device. The safety function can be described as a function that stops (or terminates) the charging of a battery of a wearable device (e.g., battery (332), battery (342)) if the battery is not fully charged after a reference time has elapsed since the charging of the battery has started. The safety timer (513) may include 2 bits of data.A temperature status (515) may indicate the temperature of a battery of a wearable device (e.g., battery (332), battery (342)). The temperature status (515) may include a voltage magnitude corresponding to the temperature of the battery. For example, a wearable device (e.g., first wearable device (301), second wearable device (302)) may measure a voltage corresponding to the temperature of a battery (e.g., battery (332), battery (342)) using a PMIC (e.g., PMIC (330), PMIC (340)). The measured voltage may be included in the temperature status (515). The temperature status (515) may include 2 bits of data. A battery voltage code (517) may indicate the voltage (or battery voltage) of a battery of a wearable device (e.g., battery (332), battery (342)). The battery voltage code (517) may include 3 bits of data. By using the voltage of the battery (e.g., battery (332), battery (342)) indicated by the battery voltage code (517), the battery level of the wearable device (e.g., first wearable device (301), second wearable device (302)) can be identified or determined.

[0097] According to one embodiment, the information of the second type (520) may include a header. The header may include 4 bits of data. For example, the header of the information of the second type (520) may include the binary number '0011'. For example, the header of the information of the second type (520) may include the hexadecimal number '0x3'. A wearable device (e.g., a first wearable device (301), a second wearable device (302)) may provide, transmit, or deliver the information of the second type (520) to a charging device (201). The charging device (201) may acquire or receive the information of the second type (520) through an interface (e.g., a first interface (251), a second interface (252)). The information of the second type (520) may include SOC data (521). SOC data (521) may represent the SOC of a battery of a wearable device (e.g., battery (332), battery (342)). SOC data (521) may contain 8 bits of data.

[0098] According to one embodiment, the information of the third type (530) may include a header. The header may include 4 bits of data. For example, the header of the information of the third type (530) may include the binary number '1011'. For example, the header of the information of the third type (530) may include the hexadecimal number '0xB'. A wearable device (e.g., a first wearable device (301), a second wearable device (302)) may provide, transmit, or deliver the information of the third type (530) to a charging device (201) in response to identifying that the state of the battery (e.g., battery voltage, battery level, SOC) has changed. The charging device (201) may obtain or receive the information of the third type (530) through an interface (e.g., a first interface (251), a second interface (252)). Information of the third type (530) may include data indicating the state of the wearable device. The state of the wearable device may include the state of the wearable device's battery (e.g., battery (332), battery (342)). For example, information of the third type (530) may include a safety timer (533), a temperature state (535), and / or a battery voltage code (537). Since the safety timer (533) may be substantially the same as the safety timer (513), redundant descriptions are omitted. Since the temperature state (535) may be substantially the same as the temperature state (515), redundant descriptions are omitted. Since the battery voltage code (537) may be substantially the same as the battery voltage code (517), redundant descriptions are omitted.

[0099] FIG. 5b illustrates examples of operations of a charging device (e.g., charging device (201)) for determining a threshold charge level (e.g., a first threshold charge level, a second threshold charge level of FIG. 4). The operations of FIG. 5b (e.g., operations 541, 543, 545) may be related to operations 401 and / or 403 of FIG. 4.

[0100] Referring to FIG. 5b, in operation 541, a charging device (201) (e.g., at least one processor (200)) can identify that a first wearable device (e.g., a first wearable device (301)) is connected to the charging device (201) and that a second wearable device (e.g., a second wearable device (302)) is connected to the charging device (201). The charging device (201) may be connected to the first wearable device (301) through a first interface (e.g., a first interface (251)). The charging device (201) may be connected to the second wearable device (302) through a second interface (e.g., a second interface (251)).

[0101] According to one embodiment, the charging device (201) may start charging the first wearable device (301) in response to identifying that the first wearable device (301) is connected. Charging the first wearable device (301) by the charging device (201) may include providing power to the first wearable device (301). While charging the first wearable device (301), the charging device (201) may measure a first charging time and store the first charging time. The first charging time may include the time during which the battery of the first wearable device (301) (e.g., battery (332)) is charged, that is, the time until the battery is fully charged. Based on the first charging time, the charging device (201) may obtain, determine, or calculate a first cumulative charging time. For example, the charging device (201) can obtain a first accumulated charging time by accumulating and summing the first charging time obtained over a period of time (e.g., hours, days, weeks, etc.). For example, the first charging time can be obtained in an active state (e.g., including a standby state and a charging state, excluding a discharge state). For example, the charging device (201) can obtain a first accumulated charging time by accumulating and summing the first charging time obtained during a reference period (e.g., 10 hours).

[0102] According to one embodiment, the charging device (201) may start charging the second wearable device (302) in response to identifying that the second wearable device (302) is connected. Charging the second wearable device (302) by the charging device (201) may include providing power to the second wearable device (302). While charging the second wearable device (302), the charging device (201) may measure a second charging time and store the second charging time. The second charging time may include the time during which the battery of the second wearable device (302) (e.g., battery (332)) is charged, that is, the time until the battery is fully charged. Based on the second charging time, the charging device (201) may obtain, determine, or calculate a second cumulative charging time. For example, the charging device (201) can obtain a second accumulated charging time by accumulating and summing the second charging time obtained over a period of time (e.g., hours, days, weeks, etc.). For example, the second charging time can be obtained in an active state (e.g., including a standby state and a charging state, excluding a discharge state). For example, the charging device (201) can obtain a second accumulated charging time by accumulating and summing the second charging time obtained during a reference period (e.g., 10 hours).

[0103] According to one embodiment, the charging device (201) may periodically obtain a first cumulative charging time and / or a second cumulative charging time. For example, the charging device (201) may repeatedly calculate or determine the first cumulative charging time and / or the second cumulative charging time at specified time intervals (e.g., 5 hours).

[0104] In operation 543, a charging device (201) (e.g., at least one processor (200)) can obtain first battery information (e.g., battery information (500)) from a first wearable device (301) and obtain second battery information (e.g., battery information (500)) from a second wearable device (302).

[0105] According to one embodiment, a charging device (201) can obtain or identify the battery level (or SOC of the battery (332)) of the first wearable device (301) using first battery information. The charging device (201) can identify whether the first wearable device (301) is in a fully charged state by using the battery level (or SOC of the battery (332)) of the first wearable device (301). For example, the charging device (201) can identify whether the battery level (or battery voltage) has reached a full charge level (or full charge voltage) and / or whether the value indicated by the SOC of the battery (332) is 'about 100%'. For example, the charging device (201) can identify that the battery level (or SOC of the battery (332)) of the first wearable device (301) is increasing by using the first battery information. The charging device (201) may start measuring the first charging time in response to identifying that the battery level (or SOC of the battery (332)) of the first wearable device (301) increases. The charging device (201) may stop measuring the first charging time in response to identifying that the battery level of the first wearable device (301) reaches a full charge level. As an example, but not limited to, the charging device (201) may stop measuring the first charging time in response to identifying that the value of the SOC of the battery (332) of the first wearable device (301) indicates 'about 100%'. The charging device (201) may exclude from the first charging time the time for recharging to maintain the first wearable device (301) in a fully charged state after the first wearable device (301) is fully charged.

[0106] According to one embodiment, the charging device (201) can obtain or identify the battery level (or SOC of the battery (342)) of the second wearable device (302) using the second battery information. The charging device (201) can identify whether the second wearable device (302) is in a fully charged state by using the battery level (or SOC of the battery (342)) of the second wearable device (302). For example, the charging device (201) can identify whether the battery level (or battery voltage) has reached a full charge level (or full charge voltage) and / or whether the value indicated by the SOC of the battery (342) is 'about 100%'. For example, the charging device (201) can identify that the battery level (or SOC of the battery (342) of the second wearable device (302) is increasing by using the second battery information. The charging device (201) may start measuring the second charging time in response to identifying that the battery level (or SOC of the battery (342)) of the second wearable device (302) increases. The charging device (201) may stop measuring the second charging time in response to identifying that the battery level of the second wearable device (302) reaches a full charge level. As an example, but not limited to, the charging device (201) may stop measuring the second charging time in response to identifying that the value of the SOC of the battery (342) of the second wearable device (302) indicates 'about 100%'. The charging device (201) may exclude from the second charging time the time during which recharging is performed to keep the second wearable device (302) in a fully charged state after the second wearable device (302) is fully charged.

[0107] In operation 545, a charging device (201) (e.g., at least one processor (200)) can determine a first threshold charging level and a second threshold charging level, respectively, based on the usage proportion, i.e., ratio, of the second cumulative charging time to the first cumulative charging time. For example, the charging device (201) can determine the first threshold charging level to be smaller and the second threshold charging level to be larger as the usage proportion, i.e., ratio, of the second cumulative charging time to the first cumulative charging time increases.

[0108] According to one embodiment, the charging device (201) may obtain, determine, or calculate each of the first usage ratio of the first wearable device (301) and the second usage ratio of the second wearable device (302) according to the ratio of the second cumulative charging time to the first cumulative charging time. The following mathematical formulas may be referenced for the method of calculating each of the first usage ratio and the second usage ratio.

[0109]

[0110]

[0111]

[0112]

[0113] According to one embodiment, the charging device (201) may acquire, determine, or calculate a first threshold SOC based on a first usage ratio obtained using [Equation 1]. The first threshold SOC may correspond to a first threshold charge level. The first threshold SOC may be described as the SOC of the battery (332) targeted by the charging device (201) charging the battery (332) of the first wearable device (301). When the SOC of the battery (332) is at the first threshold charge level, the battery level of the battery (332) may be at the first threshold charge level. The charging device (201) may acquire, determine, or calculate a second threshold SOC based on a second usage ratio obtained using [Equation 2]. The second threshold SOC may correspond to a second threshold charge level. The second threshold SOC can be described as the target SOC of the battery (342) by the charging device (201) charging the battery (342) of the second wearable device (302). When the SOC of the battery (342) is at the second threshold charging level, the battery level of the battery (342) may be at the second threshold charging level. Each of the first threshold SOC and the second threshold SOC can be calculated by the following mathematical formula.

[0114]

[0115]

[0116]

[0117]

[0118] According to one embodiment, the charging device (201) can obtain a first threshold charging level according to a first threshold SOC obtained using [Equation 3]. The charging device (201) can obtain a second threshold charging level according to a second threshold SOC obtained using [Equation 4].

[0119] According to one embodiment, the charging device (201) can determine the primary-use device and the secondary-use device by comparing the first usage ratio of the first wearable device (301) and the second usage ratio of the second wearable device (302). For example, the charging device (201) can determine the first wearable device (301) as the secondary-use device and the second wearable device (301) as the primary-use device based on the determination that the second usage ratio is greater than the first usage ratio.

[0120] According to one embodiment, the charging device (201) can determine the primary-use device and the secondary-use device by comparing the first threshold charging level (or first threshold SOC) of the first wearable device (301) and the second threshold charging level (or second threshold SOC) of the second wearable device (302). For example, the charging device (201) can determine the first wearable device (301) as the secondary-use device and the second wearable device (301) as the primary-use device based on the determination that the second threshold charging level (or second threshold SOC) is greater than the first threshold charging level (or first threshold SOC).

[0121] The method for calculating the first usage ratio, the method for calculating the second usage ratio, the method for calculating the first critical charge level, and / or the method for calculating the second critical charge level exemplified in FIG. 5b are merely exemplary for convenience of explanation and the embodiments of the present disclosure are not limited thereto.

[0122] FIG. 6 illustrates an example of a graph showing the state of a wearable device (e.g., a first wearable device (301), a second wearable device (302)) that is charged by a charging device (e.g., a charging device (201)). The wearable device (e.g., a first wearable device (301), a second wearable device (302)) can obtain power from the charging device (201).

[0123] The wearable device may be connected to the charging device (201) through an interface (e.g., a first interface (251), a second interface (252)). For example, the wearable device may be connected to a battery (e.g., a battery (230)) within the charging device (201). For example, the wearable device may be connected to a power input circuit (e.g., a power input circuit (220)) within the charging device (201).

[0124] Referring to FIG. 6, a graph (601) may represent the state of voltage obtained by a wearable device (e.g., first wearable device (301), second wearable device (302)) over time while the wearable device is being charged, and the state of battery voltage of the wearable device's battery (e.g., battery (332), battery (342)) over time. The horizontal axis of the graph (601) may represent time. The unit of the horizontal axis of the graph (601) may be minutes. The vertical axis of the graph (601) may represent voltage. The unit of the vertical axis of the graph (601) may be volts (V).

[0125] According to one embodiment, the line (603) may represent a voltage obtained by the wearable device. For example, the line (603) may be referred to as a voltage provided by the charging device (201) to the wearable device through an interface (e.g., a first interface (251), a second interface (252)).

[0126] According to one embodiment, the line (604) may represent the battery voltage of the battery of the wearable device.

[0127] According to one embodiment, the graph (602) may represent the state of the current over time. The graph (602) may represent the state of the current obtained by the wearable device over time while the wearable device (e.g., first wearable device (301), second wearable device (302)) is being charged. The horizontal axis of the graph (602) may represent time. The unit of the horizontal axis of the graph (602) may be minutes. The vertical axis of the graph (602) may represent the current. The unit of the vertical axis of the graph (602) may be milliamperes (mA).

[0128] According to one embodiment, the line (605) may represent a current obtained by a wearable device. For example, the line (605) may be referred to as a current provided by a charging device (201) to a wearable device through an interface (e.g., a first interface (251), a second interface (252)).

[0129] According to one embodiment, in the time interval (610), line (603) may indicate about 4.8 V. Line (604) may indicate that the battery voltage increases from less than about 3 V to about 3.2 V. Line (605) may indicate about 8 mA.

[0130] According to one embodiment, in the time interval (620), line (603) may indicate about 4.2 V. Line (604) may indicate that the battery voltage increases from about 3.2 V to about 4.12 V. Line (605) may indicate about 104 mA.

[0131] According to one embodiment, in the time interval (630), line (603) may indicate about 4.4 V. Line (604) may indicate that the battery voltage decreases from about 4.12 V to about 4.05 V. Line (605) may indicate that the current decreases from about 104 mA to about 35 mA.

[0132] According to one embodiment, in the time interval (640), line (603) may indicate about 4.6 V. Line (604) may indicate that the battery voltage increases from about 4.05 V to about 4.35 V. Line (605) may indicate about 35 mA.

[0133] According to one embodiment, in the time interval (650), line (603) may indicate about 4.8 V. Line (604) may indicate that the battery voltage is about 4.35 V or higher. The wearable device may be in a fully charged state. Line (605) may indicate a decrease from about 35 mA to about 10 mA.

[0134] According to one embodiment, in the time interval (660), line (603) may indicate about 4.8 V. Line (604) may indicate that the battery voltage is about 4.35 V or higher. The wearable device may be in a fully charged state. Line (605) may indicate a decrease from about 10 mA to about 5 mA.

[0135] FIG. 7 illustrates examples of operations of a charging device (e.g., charging device (201)) that charges wearable devices (e.g., first wearable device (301) and second wearable device (302)) while acquiring external power. In the present disclosure, for convenience of explanation, the first wearable device (301) may be determined as a secondary-use device and the second wearable device (302) may be determined as a primary-use device. The frequency of use of the second wearable device (302) determined as the primary-use device is determined to be higher than the frequency of use of the first wearable device (301) determined as the secondary-use device.

[0136] Referring to FIG. 7, in operation 701, a charging device (201) (e.g., at least one processor (200)) may obtain external power through a power input circuit (e.g., a power input circuit (220)). The charging device (201) may charge a first wearable device (301) and a second wearable device (302) using the obtained external power. The charging device (201) may provide power to the first wearable device (301) through a first interface (251) and provide power to the second wearable device (302) through a second interface (252) using the obtained external power. For example, the amount of power provided to the first wearable device (301) and the amount of power provided to the second wearable device (302) may be the same or corresponding.

[0137] In operation 703, a charging device (201) (e.g., at least one processor (200)) can identify whether a first battery level of a first wearable device (301) exceeds a first threshold charge level. The first battery level may represent the charge amount of a battery (e.g., battery (332)) of the first wearable device (301). The first threshold charge level may be described as the charge amount of the battery targeted by the charging device (201) charging the battery (332) of the first wearable device (301). For the first threshold charge level, the descriptions of the first threshold charge level of FIG. 3, FIG. 4, FIG. 5a, and / or FIG. 5b may be referenced. The charging device (201) may execute operation 705 based on the determination that the first battery level of the first wearable device exceeds the first threshold charge level (or is not less than the first threshold charge level, or is not lower than the first threshold charge level). The charging device (201) may execute operation 703 again based on the determination that the first battery level of the first wearable device does not exceed the first threshold charge level (or is less than the first threshold charge level, or is lower than the first threshold charge level). According to one embodiment, the charging device (201) may charge the first wearable device (301) and the second wearable device (302) using external power obtained through the power input circuit (220) based on the determination that the first battery level of the first wearable device does not exceed the first threshold charge level (or is less than the first threshold charge level, or is lower than the first threshold charge level). The charging device (201) can use acquired external power to provide power to the first wearable device (301) through the first interface (251) and to the second wearable device (302) through the second interface (252). For example, the amount of power provided to the first wearable device (301) and the amount of power provided to the second wearable device (302) may be the same or corresponding.

[0138] In FIG. 7, the charging device (201) is shown to perform operation 705 in accordance with the determination that the first battery level of the first wearable device exceeds the first threshold charge level (or is not less than the first threshold charge level, or is not lower than the first threshold charge level), but this is merely illustrative and the embodiments of the present disclosure are not limited thereto. As a non-limiting example, the charging device (201) may perform operation 705 in response to performing operation 701.

[0139] In operation 705, a charging device (201) (e.g., at least one processor (200)) can identify whether a second threshold charge level exceeds a second battery level of the second wearable device (302). The second battery level may represent the charge amount of the battery (e.g., battery (342)) of the second wearable device (302). The second threshold charge level may be described as the charge amount of the battery targeted by the charging device (201) charging the battery (342) of the second wearable device (302). For the second threshold charge level, the descriptions of the second threshold charge level of FIGS. 3, FIGS. 4, FIGS. 5a and / or FIGS. 5b may be referenced. The charging device (201) may execute operation 707 based on the determination that the second threshold charging level exceeds the second battery level of the second wearable device (302) (or is not less than the second battery level, or is not lower than the second battery level). The charging device (201) may execute operation 703 again based on the determination that the second threshold charging level does not exceed the second battery level of the second wearable device (302) (or is less than the second battery level, or is lower than the second battery level). According to one embodiment, the charging device (201) can charge the first wearable device (301) and the second wearable device (302) using external power obtained through the power input circuit (220) according to a determination that the second threshold charging level does not exceed the second battery level of the second wearable device (302) (or is smaller than the second battery level, or lower than the second battery level). The charging device (201) can use the obtained external power to provide power to the first wearable device (301) through the first interface (251) and to provide power to the second wearable device (302) through the second interface (252). For example, the amount of power provided to the first wearable device (301) and the amount of power provided to the second wearable device (302) may be the same or corresponding.

[0140] In operation 707, a charging device (201) (e.g., at least one processor (200)) may provide power to only the second wearable device (302) among the first wearable device (301) and the second wearable device (302) through the second interface (252). For example, the charging device (201) may charge only the second wearable device (302). For example, the charging device (201) may connect only the second wearable device (302) among the first wearable device (301) and the second wearable device (302) to the power input circuit (220). For example, the charging device (201) may connect the second wearable device (302) to the power input circuit (220) instead of connecting the first wearable device (301) to the power input circuit (220). For example, the charging device (201) may disconnect the first wearable device (301) from the power input circuit (220) and connect the second wearable device (302) to the power input circuit (220) through the second interface (252). For example, the charging device (201) may establish a charging connection between the second wearable device (302) and the power input circuit (220) without a charging connection between the first wearable device (301) and the power input circuit (220). For example, the charging device (201) may refrain from or block providing power to the first wearable device (301) and provide power to the second wearable device (302) through the second interface (252). The charging device (201) can increase the amount of power to be provided to the second wearable device (302) by refraining from or blocking power to the first wearable device (301). For example, the amount of power to be provided to the second wearable device (302) by refraining from or blocking power to the first wearable device (301) may be greater than the amount (or size) of power provided to the second wearable device (202) before refraining from or blocking power to the first wearable device (301).For example, when power supply to the first wearable device (301) is withheld or blocked, the charging speed of the second wearable device (202) may be faster than the charging speed of the second wearable device (302) before power supply to the first wearable device (301) is withheld or blocked. Operation 707 may correspond to operation 409 of FIG. 4.

[0141] FIG. 8 illustrates examples of operations of a charging device (e.g., charging device (201)) that charges wearable devices (e.g., first wearable device (301) and second wearable device (302)) while not acquiring external power.

[0142] Referring to FIG. 8, in operation 801, a charging device (201) (e.g., at least one processor (200)) may determine that the charge level of a battery (e.g., battery (230)) is greater than a reference charge level. The charge level of the battery (230) may be described as the charge amount (or electrical capacity) of the battery (230) used to charge wearable devices (e.g., a first wearable device (301) and a second wearable device (302)). For example, the reference charge level may be described as a level that serves as a reference for the charging device (201) to provide power to the wearable devices using the charge level (or charge amount) of the battery (230). For example, when the charge level of the battery (230) is above a reference charge level, wearable devices (e.g., a first wearable device (301) and a second wearable device (302)) can obtain power from the battery (230). For example, the reference state of charge (SOC) of the battery (230) indicated by the reference charge level may include 'about 0%'.

[0143] According to one embodiment, the charging device (201) can perform operation 801 while not obtaining external power through a power input circuit (e.g., power input circuit (220)).

[0144] In operation 803, a charging device (201) (e.g., at least one processor (200)) can identify whether a second threshold charge level exceeds a second battery level of the second wearable device (302). The charging device (201) can execute operation 805 based on the determination that the second threshold charge level exceeds the second battery level of the second wearable device (302) (or is not less than the second battery level, or is not lower than the second battery level). The charging device (201) can execute operation 809 based on the determination that the second threshold charge level does not exceed the second battery level of the second wearable device (302) (or is less than the second battery level, or is lower than the second battery level).

[0145] In operation 805, a charging device (201) (e.g., at least one processor (200)) can determine the amount of power (or voltage) to be supplied to a second wearable device (302) using the battery (230) based on the charge level of the battery (230), a second battery level, and a second threshold charge level.

[0146] According to one embodiment, a method for determining the amount of power (or voltage) to be provided to a wearable device (301, 302) by a charging device (201) using a battery (230) may refer to the following mathematical formula.

[0147]

[0148]

[0149] According to one embodiment, the charging device (201) can determine the amount of power (or voltage) to be provided to the second wearable device (302) using the battery (230) according to [Equation 5]. For example, the charging device (201) can determine the amount of power (or voltage) to be provided to the second wearable device (302) based on the smaller of the electric capacity corresponding to the difference between the second threshold charge level and the second battery level and the electric capacity corresponding to the charge level of the battery (230).

[0150] In operation 807, a charging device (201) (e.g., at least one processor (200)) can provide power to a second wearable device (302) through a second interface (252) using a battery (230) based on the amount of power determined in operation 805. For example, the charging device (201) can connect the second wearable device (302) and the battery (230). The charging device (201) can provide power corresponding to the determined amount using the battery (230) to the second wearable device (302). The charging device (201) can charge the second wearable device (302) by providing power corresponding to the determined amount using the battery (230).

[0151] According to one embodiment, the charging device (201) can connect the first wearable device (301) and the battery (230) through the first interface (251) after the second wearable device (302) and the battery (230) are connected. For example, the charging device (201) can provide the remaining power of the battery (230) to the second wearable device (302). The charging device (201) can charge the first wearable device (301) using the remaining power of the battery (230).

[0152] In operation 809, a charging device (201) (e.g., at least one processor (200)) can identify whether a first threshold charge level exceeds a first battery level of the first wearable device (301). The charging device (201) can execute operation 811 based on the determination that the first threshold charge level exceeds the first battery level of the first wearable device (301) (or is not less than the first battery level, or is not lower than the first battery level). The charging device (201) can execute operation 815 based on the determination that the first threshold charge level does not exceed the first battery level of the first wearable device (301) (or is less than the first battery level, or is lower than the first battery level).

[0153] In operation 811, a charging device (201) (e.g., at least one processor (200)) can determine the amount of power (or voltage) to be provided to the first wearable device (301) using the battery (230) based on the charge level of the battery (230), the first battery level, and the first threshold charge level. For example, the charging device (201) can determine the amount of power (or voltage) to be provided to the first wearable device (301) using the battery (230) according to [Equation 5]. For example, the charging device (201) can determine the amount of power (or voltage) to be provided to the first wearable device (301) based on the smaller of the electric capacity corresponding to the difference between the first threshold charge level and the first battery level and the electric capacity corresponding to the charge level of the battery (230).

[0154] In operation 813, a charging device (201) (e.g., at least one processor (200)) may provide power to a first wearable device (301) through a first interface (251) using a battery (230) based on the amount of power determined in operation 811. For example, the charging device (201) may connect the first wearable device (301) and the battery (230). The charging device (201) may provide power corresponding to the determined amount using the battery (230) to the first wearable device (301). The charging device (201) may charge the first wearable device (301) based on providing power corresponding to the determined amount using the battery (230).

[0155] In operation 815, a charging device (201) (e.g., at least one processor (200)) can use a battery (230) to provide power to a first wearable device (301) through a first interface (251) and to provide power to a second wearable device (302) through a second interface (252). For example, the charging device (201) can connect the first wearable device (301) and the battery (230) through the first interface (251), and connect the second wearable device (302) and the battery (230) through the second interface (252). For example, the charging device (201) can use the battery (230) to provide power to the first wearable device (301) through the first interface (251) and to provide power to the second wearable device (302) through the second interface (252). For example, the charging device (201) can use the battery (230) to charge the first wearable device (301) and to charge the second wearable device (302).

[0156] FIG. 9 illustrates examples of other operations of a charging device (e.g., charging device (201)) that charges wearable devices (e.g., first wearable device (301) and second wearable device (302)) while not acquiring external power.

[0157] Referring to FIG. 9, in operation 901, a charging device (201) (e.g., at least one processor (200)) may determine that the charge level of a battery (e.g., battery (230)) is not greater than a reference charge level. The charge level of the battery (230) may be described as the charge amount (or electrical capacity) of the battery (230) used to charge wearable devices (e.g., a first wearable device (301) and a second wearable device (302)). For example, the reference charge level may be described as a level that serves as a reference for the charging device (201) to provide power to the wearable devices using the charge level (or charge amount) of the battery (230). For example, when the charge level of the battery (230) is above a reference charge level, wearable devices (e.g., a first wearable device (301) and a second wearable device (302)) can obtain power from the battery (230). For example, the reference state of charge (SOC) of the battery (230) indicated by the reference charge level may include 'about 0%'.

[0158] According to one embodiment, the charging device (201) can perform operation 901 while not obtaining external power through a power input circuit (e.g., power input circuit (220)).

[0159] In operation 903, the charging device (201) (e.g., at least one processor (200)) can determine whether the second threshold charge level exceeds the second battery level of the second wearable device (302). The charging device (201) can execute operation 905 based on the determination that the second threshold charge level exceeds the second battery level of the second wearable device (302) (or is not less than the second battery level, or is not lower than the second battery level). The charging device (201) can execute operation 903 again based on the determination that the second threshold charge level does not exceed the second battery level of the second wearable device (302) (or is less than the second battery level, or is lower than the second battery level).

[0160] In FIG. 9, the charging device (201) is shown to perform operation 905 in accordance with the determination that the second threshold charging level exceeds the second battery level of the second wearable device (302) (or is not less than the second battery level, or is not lower than the second battery level), but this is merely illustrative and the embodiments of the present disclosure are not limited thereto. As a non-limiting example, the charging device (201) may perform operation 907 in accordance with the determination that the second threshold charging level exceeds the second battery level of the second wearable device (302) (or is not less than the second battery level, or is not lower than the second battery level).

[0161] In operation 905, a charging device (201) (e.g., at least one processor (200)) can determine whether the first battery level of the first wearable device (301) exceeds a first threshold charge level. The charging device (201) can execute operation 907 based on the determination that the first battery level of the first wearable device exceeds the first threshold charge level (or is not less than the first threshold charge level, or is not lower than the first threshold charge level). The charging device (201) can execute operation 903 again based on the determination that the first battery level of the first wearable device does not exceed the first threshold charge level (or is less than the first threshold charge level, or is lower than the first threshold charge level).

[0162] In operation 907, a charging device (201) (e.g., at least one processor (200)) can connect the second wearable device (302) and the first wearable device (301) based on power obtained from the first wearable device (301). The charging device (201) can be connected to the first wearable device (301) through a first interface (251). The charging device (201) can be connected to the second wearable device (302) through a second interface (252). The charging device (201) can obtain power from the first wearable device (301). A method by which the charging device (201) obtains power from the first wearable device (301) will be described and illustrated with reference to FIG. 10.

[0163] According to one embodiment, the charging device (201) can provide power obtained from the first wearable device (301) to the second wearable device (302). The charging device (201) can charge the second wearable device (302) using the power obtained from the first wearable device (301).

[0164] According to one embodiment, the charging device (201) can obtain battery information (e.g., battery information (500)) from the first wearable device (301) through the first interface (251) after the second wearable device (302) and the first wearable device (301) are connected. The charging device (201) can identify the battery level of the first wearable device (301) from the battery information. The charging device (201) can disconnect the connection between the second wearable device (302) and the first wearable device (301) based on the determination that the identified battery level is lower than the first threshold charge level. For example, the charging device (201) can refrain from, stop, or block the provision of power obtained from the first wearable device (301) to the second wearable device (302) based on the determination that the identified battery level is lower than the first threshold charge level. In this way, the charging device (201) can ensure the usability of the first wearable device (301) by refraining from, stopping, or blocking the provision of power obtained from the first wearable device (301) to the second wearable device (302). For example, the charging device (201) may refrain from, stop, or block charging the second wearable device (302) using power obtained from the first wearable device (301) based on a determination that the identified battery level is lower than the first threshold charge level.

[0165] According to one embodiment, the charging device (201) can obtain battery information (e.g., battery information (500)) from the second wearable device (302) through the second interface (252) after the second wearable device (302) and the first wearable device (301) are connected. The charging device (201) can identify the battery level of the second wearable device (302) from the battery information. The charging device (201) can disconnect the connection between the second wearable device (302) and the first wearable device (301) based on the determination that the identified battery level is greater than the second threshold charge level. For example, the charging device (201) can refrain from, stop, or block the provision of power obtained from the first wearable device (301) to the second wearable device (302) based on the determination that the identified battery level is greater than the second threshold charge level. The charging device (201) can ensure the usability of the first wearable device (301) and the second wearable device (301) by refraining from, stopping, or blocking the provision of power obtained from the first wearable device (301) to the second wearable device (302) based on the determination that the identified battery level is greater than the second threshold charging level.

[0166] FIG. 10 illustrates an example of a charging device (e.g., charging device (201)) configured to provide power obtained from a first wearable device (e.g., first wearable device (301)) to a second wearable device (e.g., second wearable device (302)). In embodiments according to the present disclosure, providing power may include supplying power, delivering power, and / or applying power. Additionally, in the present disclosure, battery level may be referred to as the charge amount of the battery, the state of charge (SOC) of the battery, and / or other terms having an equivalent technical meaning. In the following embodiments, for convenience of explanation, the first wearable device (301) may be determined as a secondary-use device and the second wearable device (302) may be determined as a primary-use device. The frequency of use of the second wearable device (302) determined as the primary-use device may be determined to be higher than the frequency of use of the first wearable device (301) determined as the secondary-use device. FIG. 10 may be related to the operation 907 of FIG. 9. Since at least some of the components of the charging device (201) exemplified in FIG. 10 may be substantially identical to at least some of the components of the charging device (201) exemplified in FIG. 3, redundant descriptions are omitted.

[0167] Referring to FIG. 10, the PMIC (240) may include a switch circuit (1010), a switch (1020), a switch circuit (1030), and / or a switch (1040). The switch circuit (1010) may optionally be configured to connect the switch (1020) to an input terminal (323) or to connect the switch (1020) to the switch (1040). The switch (1020) may optionally be configured to connect the first interface (251) to the switch circuit (1030) or to connect the first interface (251) to the switch circuit (1010). The switch circuit (1030) may optionally be configured to connect the switch (1040) to an input terminal (323) or to connect the switch (1040) to the switch (1020). The switch (1040) may be configured to optionally connect the second interface (252) to the switch circuit (1010) or to connect the second interface (252) to the switch circuit (1030).

[0168] According to one embodiment, the charging device (201) may be configured to obtain power from the first wearable device (301). The charging device (201) may be configured to provide the power obtained from the first wearable device (301) to the second wearable device (302). The charging device (201) may be connected to the first wearable device (301) through the first interface (251).

[0169] According to one embodiment, the charging device (201) may obtain power from the first wearable device (301) through the first interface (251) based on the determination that the charge level of the battery (230) is not greater than the reference charge level while not obtaining external power through the power input circuit (220). The charging device (201) may control the switch (1020) so that the first interface (251) and the switch circuit (1030) are connected. For example, the charging device (201) may provide the power obtained from the first wearable device (301) to the switch circuit (1030) using the switch (1020).

[0170] The charging device (201) can control the switch circuit (1030) so that the switch (1020) and the switch (1040) are connected. For example, the charging device (201) can provide power obtained from the first wearable device (301) to the switch (1040) using the switch circuit (1030). The charging device (201) can control the switch (1040) so that the switch circuit (1030) and the second interface (252) are connected. For example, the charging device (201) can provide power obtained from the first wearable device (301) to the second interface (252) using the switch (1040). The charging device (201) can be connected to the second wearable device (302) through the second interface (252). For example, the charging device (201) can provide power obtained from the first wearable device (301) to the second wearable device (202) through the second interface (252).

[0171] As an example not limited to, the charging device (201) may be configured to provide power obtained from the second wearable device (302) to the first wearable device (301). The charging device (201) may be connected to the second wearable device (302) through the second interface (252).

[0172] According to one embodiment, the charging device (201) may obtain power from the second wearable device (302) through the second interface (252) based on the determination that the charge level of the battery (230) is not greater than the reference charge level while not obtaining external power through the power input circuit (220). The charging device (201) may control the switch (1040) so that the second interface (252) and the switch circuit (1010) are connected. For example, the charging device (201) may provide the power obtained from the second wearable device (302) to the switch circuit (1010) using the switch (1040).

[0173] The charging device (201) can control the switch circuit (1010) so that the switch (1040) and the switch (1010) are connected. For example, the charging device (201) can use the switch circuit (1010) to provide power obtained from the second wearable device (302) to the switch (1020). The charging device (201) can control the switch (1020) so that the switch circuit (1010) and the first interface (251) are connected. For example, the charging device (201) can use the switch (1020) to provide power obtained from the second wearable device (302) to the first interface (251). The charging device (201) can be connected to the first wearable device (301) through the first interface (251). For example, the charging device (201) can provide power obtained from the second wearable device (302) to the first wearable device (201) through the first interface (251).

[0174] FIG. 11 illustrates an example of a first wearable device (e.g., first wearable device (301)) for charging wearable devices (e.g., first wearable device (301), second wearable device (302)) using a charging device (201).

[0175] In embodiments according to the present disclosure, providing power may include supplying power, delivering power, and / or applying power. Additionally, in the present disclosure, battery level may be referred to as the charge amount of the battery, the state of charge (SOC) of the battery, and / or other terms having an equivalent technical meaning. In the following embodiments, for convenience of explanation, a first wearable device (301) may be determined as a secondary-use device and a second wearable device (302) may be determined as a primary-use device. The frequency of use of the second wearable device (302) determined as the primary-use device may be determined to be higher than the frequency of use of the first wearable device (301) determined as the secondary-use device.

[0176] The first wearable device (301) may include at least one processor (1100), memory (1110), battery (332), and / or PMIC (330). For the battery (332), the descriptions for the battery (332) in FIG. 3 may be referenced. For the PMIC (330), the descriptions for the PMIC (330) in FIG. 3 may be referenced.

[0177] At least one processor (1100) may include a hardware component for processing data based on executing instructions. At least one processor (1100) may be configured to execute instructions stored in memory (1110) individually or collectively. At least one processor (1100) may include a processing circuit. For example, the hardware component for processing data may include an arithmetic and logic unit (ALU), a floating point unit (FPU), and a field programmable gate array (FPGA). For example, the hardware component for processing data may include a central processing unit (CPU), a graphic processing unit (GPU), a display processing unit (DPU), a neural processing unit (NPU), a digital signal processor (DSP), an application processor (AP), and / or a microcontroller (MCU). At least one processor (1100) may include one or more cores. For example, at least one processor (1100) may have the structure of a multi-core processor such as a dual core, quad core, or hexa core. The description of the processor (120) of FIG. 1 may also apply to at least one processor (1100) of FIG. 11.

[0178] Memory (1110) may include a hardware component for storing data and / or instructions that are input to and / or output from at least one processor (1100). Memory (1110) may include one or more storage media. Memory (1110) may include volatile memory, such as random-access memory (RAM), and / or non-volatile memory, such as read-only memory (ROM). Volatile memory may include at least one of, for example, dynamic RAM (DRAM), static RAM (SRAM), cache RAM, or pseudo SRAM (PSRAM). Non-volatile memory may include at least one of, for example, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), flash memory, hard disk, compact disk, or embedded multimedia card (EMMC). The description of the memory (130) in Fig. 1 can also be applied to the memory (1110) in Fig. 11.

[0179] In one embodiment, within the memory (1110) of the first wearable device (301), one or more instructions (or commands) representing operations and / or operations to be performed on data by at least one processor (1100) of the first wearable device (301) may be stored. A set of one or more instructions may be referred to as a program, firmware, operating system, process, routine, sub-routine and / or application.

[0180] According to one embodiment, a first wearable device (301) (e.g., at least one processor (1100)) may transmit a control signal to a charging device (201) through a first interface (e.g., a first interface (251)). The charging device (201) (e.g., at least one processor (200)) may, in response to the control signal, perform at least some of the operations of the charging device (201) illustrated in FIG. 3, FIG. 4, FIG. 5a, FIG. 5b, FIG. 6, FIG. 7, FIG. 8, FIG. 9, and / or FIG. 10.

[0181] As an example not limited to, the first wearable device (301) and the second wearable device (302) may be substantially identical. The second wearable device (302) may transmit a control signal to the charging device (201) via a second interface (e.g., the second interface (252)). The charging device (201) (e.g., at least one processor (200)) may, in response to the control signal, perform at least some of the operations of the charging device (201) illustrated in FIG. 3, FIG. 4, FIG. 5a, FIG. 5b, FIG. 6, FIG. 7, FIG. 8, FIG. 9, and / or FIG. 10.

[0182] In an embodiment according to the present disclosure, a charging device (e.g., charging device (201)) may charge a wearable device (e.g., a second wearable device (302)) determined as the primary-use device preferentially over a wearable device (e.g., a first wearable device (301)) determined as the secondary-use device by performing the operations of FIG. 4, FIG. 5a, FIG. 5b, FIG. 6, FIG. 7, FIG. 8, FIG. 9, and / or FIG. 10. The frequency of use of the primary-use device may be greater than the frequency of use of the secondary-use device. By charging the second wearable device (302) determined as the primary-use device preferentially over the first wearable device (301) determined as the secondary-use device, the available time of the wearable device (301) perceived by the user may be increased. The charging device (201) may provide an enhanced user experience.

[0183] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs from the description below.

[0184] The technical problems to be solved in this disclosure are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this disclosure pertains.

[0185] As described above, the charging device may include a first interface for connecting to a first wearable device. The charging device may include a second interface for connecting to a second wearable device. The charging device may include a memory that stores instructions and includes one or more storage media. The charging device may include at least one processor that includes processing circuitry. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the charging device to obtain a first threshold charge level corresponding to the first wearable device using the first interface. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the charging device to obtain a second threshold charge level corresponding to the second wearable device using the second interface. The above instructions, when executed individually or collectively by the at least one processor, may cause the charging device to provide power to the first wearable device through the first interface and to provide power to the second wearable device through the second interface, based on the determination that the battery level of the first wearable device identified using the first interface is smaller than the first threshold charge level, based on identifying the second threshold charge level which is greater than the first threshold charge level.The above instructions, when executed individually or collectively by the at least one processor, may cause the charging device to provide power through the second interface only to the second wearable device among the first wearable device and the second wearable device, based on the determination that the battery level is not smaller than the first threshold charge level, by identifying the second threshold charge level which is greater than the first threshold charge level.

[0186] According to one embodiment, the first threshold charge level may be obtained based on first battery information obtained from the first wearable device while the first wearable device is connected to the charging device through the first interface. The second threshold charge level may be obtained based on second battery information obtained from the second wearable device while the second wearable device is connected to the charging device through the second interface.

[0187] According to one embodiment, each of the first threshold charge level and the second threshold charge level may be determined based on the ratio of the usage of the second cumulative charge time of the second wearable device obtained according to the second battery information to the first cumulative charge time of the first wearable device obtained according to the first battery information.

[0188] According to one embodiment, the amount of power provided to the second wearable device based on the determination that the battery level is smaller than the first threshold charge level may be smaller than the amount of power provided to the second wearable device based on the determination that the battery level is not smaller than the first threshold charge level.

[0189] According to one embodiment, when the instructions are executed individually or collectively by the at least one processor, the instructions may refrain from providing power to the first wearable device and cause the charging device to provide power to the second wearable device through the second interface based on a determination that the battery level is not smaller than the first threshold charge level, based on identifying the second threshold charge level which is greater than the first threshold charge level.

[0190] According to one embodiment, the charging device may include a power input circuit for obtaining external power. The instructions, when executed individually or collectively by the at least one processor, may cause the charging device to connect the first wearable device and the power input circuit through the first interface and to connect the second wearable device and the power input circuit through the second interface, based on a determination that the battery level is smaller than the first threshold charge level, based on identifying the second threshold charge level which is larger than the first threshold charge level. The instructions, when executed individually or collectively by the at least one processor, may cause the charging device to connect only the second wearable device among the first wearable device and the second wearable device to the power input circuit through the second interface, based on a determination that the battery level is not smaller than the first threshold charge level, based on identifying the second threshold charge level which is larger than the first threshold charge level.

[0191] According to one embodiment, the charging device may include a battery. The instructions may cause the charging device to determine the amount of power to be provided to the second wearable device using the battery based on the charge level of the battery, the second battery level of the second wearable device identified using the second interface, and the second threshold charge level, in accordance with the determination that the first threshold charge level is smaller than the second threshold charge level and the charge level of the battery is larger than the reference charge level, when executed individually or collectively by the at least one processor. The instructions may cause the charging device to provide power to the second wearable device through the second interface using the battery based on the determined amount, in accordance with the determination that the first threshold charge level is smaller than the second threshold charge level and the charge level of the battery is larger than the reference charge level, when executed individually or collectively by the at least one processor. When the above instructions are executed individually or collectively by the at least one processor, they may cause the charging device to provide power to the first wearable device through the first interface using the battery, after providing power to the second wearable device using the battery, in accordance with the determination that the first threshold charge level is smaller than the second threshold charge level and the charge level of the battery is larger than the reference charge level.

[0192] According to one embodiment, the instructions may cause the charging device to obtain power from the first wearable device through the first interface, based on a determination that the first threshold charge level is smaller than the second threshold charge level and the charge level is not larger than the reference charge level, when executed individually or collectively by the at least one processor. The instructions may cause the charging device to connect the second wearable device and the first wearable device connected to the first interface through the second interface, based on the obtained power, based on a determination that the first threshold charge level is smaller than the second threshold charge level and the charge level is not larger than the reference charge level, when executed individually or collectively by the at least one processor.

[0193] According to one embodiment, when the instructions are executed individually or collectively by the at least one processor, the charging device may cause the second wearable device and the first wearable device connected to the first interface to obtain battery information from the first wearable device. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the connection between the second wearable device and the first wearable device connected to the first interface to be disconnected upon the determination that the third battery level identified from the battery information is smaller than the first threshold charge level.

[0194] According to one embodiment, when the instructions are executed individually or collectively by the at least one processor, the charging device may cause the second wearable device and the first wearable device connected to the first interface to obtain battery information from the second wearable device. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the connection between the second wearable device and the first wearable device connected to the first interface to be disconnected upon the determination that the third battery level identified from the battery information is greater than the second threshold charge level.

[0195] A method performed in a charging device having a first interface for connecting to a first wearable device and a second interface for connecting to a second wearable device as described above may include an operation of obtaining a first threshold charge level corresponding to the first wearable device using the first interface. The method may include an operation of obtaining a second threshold charge level corresponding to the second wearable device using the second interface. The method may include an operation of providing power to the first wearable device through the first interface and providing power to the second wearable device through the second interface, based on a determination that the battery level of the first wearable device identified using the first interface is smaller than the first threshold charge level, based on identifying the second threshold charge level which is greater than the first threshold charge level. The above method may include an operation of providing power through the second interface only to the second wearable device among the first wearable device and the second wearable device, based on the determination that the battery level is not smaller than the first threshold charge level, by identifying the second threshold charge level which is greater than the first threshold charge level.

[0196] According to one embodiment, the first threshold charge level may be obtained based on first battery information obtained from the first wearable device while the first wearable device is connected to the charging device through the first interface. The second threshold charge level may be obtained based on second battery information obtained from the second wearable device while the second wearable device is connected to the charging device through the second interface.

[0197] According to one embodiment, each of the first threshold charge level and the second threshold charge level may be determined based on the ratio of the usage of the second cumulative charge time of the second wearable device obtained according to the second battery information to the first cumulative charge time of the first wearable device obtained according to the first battery information.

[0198] According to one embodiment, the amount of power provided to the second wearable device based on the determination that the battery level is smaller than the first threshold charge level may be smaller than the amount of power provided to the second wearable device based on the determination that the battery level is not smaller than the first threshold charge level.

[0199] According to one embodiment, the method may include the operation of refraining from providing power to the first wearable device based on the determination that the battery level is not smaller than the first threshold charge level, based on identifying the second threshold charge level which is greater than the first threshold charge level, and providing power to the second wearable device through the second interface.

[0200] According to one embodiment, the charging device may include a power input circuit for obtaining external power. The method may include the operation of connecting the first wearable device and the power input circuit through the first interface and connecting the second wearable device and the power input circuit through the second interface, based on the determination that the battery level is smaller than the first threshold charge level, based on identifying the second threshold charge level which is larger than the first threshold charge level. The method may include the operation of connecting only the second wearable device among the first wearable device and the second wearable device to the power input circuit through the second interface, based on the determination that the battery level is not smaller than the first threshold charge level, based on identifying the second threshold charge level which is larger than the first threshold charge level.

[0201] According to one embodiment, the charging device may include a battery. The method may include an operation of determining an amount of power to be provided to the second wearable device using the battery based on the charge level of the battery, a second battery level of the second wearable device identified using the second interface, and the second threshold charge level, in accordance with a determination that the first threshold charge level is smaller than the second threshold charge level and the charge level of the battery is larger than the reference charge level. The method may include an operation of providing power to the second wearable device through the second interface using the battery based on the determined amount, in accordance with a determination that the first threshold charge level is smaller than the second threshold charge level and the charge level of the battery is larger than the reference charge level. The above method may include the operation of providing power to the second wearable device using the battery based on a determination that the first threshold charge level is smaller than the second threshold charge level and the charge level of the battery is larger than the reference charge level, and then providing power to the first wearable device through the first interface using the battery.

[0202] According to one embodiment, the method may include an operation of obtaining power from the first wearable device through the first interface based on a determination that the first threshold charge level is smaller than the second threshold charge level and the charge level is not larger than the reference charge level. The method may include an operation of connecting the second wearable device and the first wearable device connected to the first interface through the second interface based on the obtained power based on a determination that the first threshold charge level is smaller than the second threshold charge level and the charge level is not larger than the reference charge level.

[0203] According to one embodiment, the method may include an operation of obtaining battery information from the first wearable device after the second wearable device and the first wearable device connected to the first interface are connected. The method may include an operation of disconnecting the connection between the second wearable device and the first wearable device connected to the first interface based on a determination that a third battery level identified from the battery information is smaller than the first threshold charge level.

[0204] According to one embodiment, the method may include an operation of obtaining battery information from the second wearable device after the second wearable device and the first wearable device connected to the first interface are connected. The method may include an operation of disconnecting the connection between the second wearable device and the first wearable device connected to the first interface based on a determination that a third battery level identified from the battery information is greater than the second threshold charge level.

[0205] In a computer-readable storage medium in which one or more programs as described above are stored, the one or more programs may include instructions that cause the charging device to obtain a first threshold charge level corresponding to the first wearable device using the first interface when executed by the charging device having a first interface for connecting to a first wearable device and a second interface for connecting to a second wearable device. The one or more programs may include instructions that cause the charging device to obtain a second threshold charge level corresponding to the second wearable device using the second interface when executed by the charging device. The above one or more programs may include instructions that cause the charging device to provide power to the first wearable device through the first interface and to provide power to the second wearable device through the second interface, based on a determination that the battery level of the first wearable device identified using the first interface is smaller than the first threshold charge level, when executed by the charging device based on identifying the second threshold charge level which is larger than the first threshold charge level. The above one or more programs may include instructions that cause the charging device to provide power to only the second wearable device among the first wearable device and the second wearable device through the second interface, based on a determination that the battery level is not smaller than the first threshold charge level, when executed by the charging device based on identifying the second threshold charge level which is larger than the first threshold charge level.

[0206] According to one embodiment, the first threshold charge level may be obtained based on first battery information obtained from the first wearable device while the first wearable device is connected to the charging device through the first interface. The second threshold charge level may be obtained based on second battery information obtained from the second wearable device while the second wearable device is connected to the charging device through the second interface.

[0207] According to one embodiment, each of the first threshold charge level and the second threshold charge level may be determined based on the ratio of the usage of the second cumulative charge time of the second wearable device obtained according to the second battery information to the first cumulative charge time of the first wearable device obtained according to the first battery information.

[0208] According to one embodiment, the amount of power provided to the second wearable device based on the determination that the battery level is smaller than the first threshold charge level may be smaller than the amount of power provided to the second wearable device based on the determination that the battery level is not smaller than the first threshold charge level.

[0209] According to one embodiment, the one or more programs may include instructions that cause the charging device to refrain from providing power to the first wearable device and to provide power to the second wearable device through the second interface, based on a determination that the battery level is not smaller than the first threshold charge level, upon identification of the second threshold charge level which is greater than the first threshold charge level when executed by the charging device.

[0210] According to one embodiment, the charging device may include a power input circuit for obtaining external power. The one or more programs may include instructions that cause the charging device to connect the first wearable device and the power input circuit through the first interface and connect the second wearable device and the power input circuit through the second interface, based on a determination that the battery level is smaller than the first threshold charge level, based on identifying the second threshold charge level which is larger than the first threshold charge level when executed by the charging device. The one or more programs may include instructions that cause the charging device to connect only the second wearable device among the first wearable device and the second wearable device to the power input circuit through the second interface, based on a determination that the battery level is not smaller than the first threshold charge level, based on identifying the second threshold charge level which is larger than the first threshold charge level when executed by the charging device.

[0211] According to one embodiment, the charging device may include a battery. The one or more programs may include instructions that cause the charging device to determine the amount of power to be provided to the second wearable device using the battery based on the charge level of the battery, the second battery level of the second wearable device identified using the second interface, and the second threshold charge level, in accordance with a determination that when executed by the charging device, the first threshold charge level is smaller than the second threshold charge level and the charge level of the battery is larger than the reference charge level. The one or more programs may include instructions that cause the charging device to provide power to the second wearable device through the second interface using the battery based on the determined amount, in accordance with a determination that when executed by the charging device, the first threshold charge level is smaller than the second threshold charge level and the charge level of the battery is larger than the reference charge level. The above one or more programs may include instructions that cause the charging device to provide power to the second wearable device using the battery, and then provide power to the first wearable device through the first interface using the battery, in accordance with the determination that when executed by the charging device, the first threshold charge level is smaller than the second threshold charge level and the charge level of the battery is larger than the reference charge level.

[0212] According to one embodiment, the one or more programs may include instructions that cause the charging device to obtain power from the first wearable device through the first interface, based on a determination that when executed by the charging device, the first threshold charge level is smaller than the second threshold charge level and the charge level is not larger than the reference charge level. The one or more programs may include instructions that cause the charging device to connect the second wearable device and the first wearable device connected to the first interface through the second interface based on the obtained power, based on a determination that when executed by the charging device, the first threshold charge level is smaller than the second threshold charge level and the charge level is not larger than the reference charge level.

[0213] According to one embodiment, the one or more programs may include instructions that cause the charging device to obtain battery information from the first wearable device after the second wearable device and the first wearable device connected to the first interface are connected when executed by the charging device. The one or more programs may include instructions that cause the charging device to disconnect the connection between the second wearable device and the first wearable device connected to the first interface when executed by the charging device, based on a determination that the third battery level identified from the battery information is smaller than the first threshold charge level.

[0214] According to one embodiment, the one or more programs may include instructions that cause the charging device to obtain battery information from the second wearable device after the second wearable device and the first wearable device connected to the first interface are connected when executed by the charging device. The one or more programs may include instructions that cause the charging device to disconnect the connection between the second wearable device and the first wearable device connected to the first interface when executed by the charging device, based on a determination that the third battery level identified from the battery information is greater than the second threshold charge level.

[0215] As described above, the charging device may include a first interface for connecting to a first wearable device. The charging device may include a second interface for connecting to a second wearable device. The charging device may include a memory that stores instructions and includes one or more storage media. The charging device may include at least one processor that includes processing circuitry. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the charging device to acquire a first threshold charge level based on a time interval during which power is supplied to the first wearable device through the first interface. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the charging device to acquire a second threshold charge level greater than the first threshold charge level based on a time interval during which power is supplied to the second wearable device through the second interface. The above instructions, when executed individually or collectively by the at least one processor, may cause the charging device to identify the battery level of the first wearable device using the first interface based on the second threshold charge level which is greater than the first threshold charge level. The above instructions, when executed individually or collectively by the at least one processor, may cause the charging device to charge the first wearable device through the first interface and charge the second wearable device through the second interface based on identifying the battery level of the first wearable device which is less than the first threshold charge level.The above instructions, when executed individually or collectively by the at least one processor, may cause the charging device to charge the second wearable device among the first wearable device and the second wearable device through the second interface based on identifying the battery level of the first wearable device that is not smaller than the first threshold charge level.

[0216] As described above, the charging device may include a first interface for connecting to a first wearable device. The charging device may include a second interface for connecting to a second wearable device. The charging device may include a memory that stores instructions and includes one or more storage media. The charging device may include at least one processor that includes processing circuitry. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the charging device to obtain a first threshold charge level corresponding to the first wearable device using the first interface. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the charging device to obtain a second threshold charge level corresponding to the second wearable device using the second interface. The second threshold charge level may be greater than the first threshold charge level. The above instructions may cause the charging device to identify the battery level of the first wearable device when executed individually or collectively by the at least one processor. The above instructions may cause the charging device to provide power to the first wearable device through the first interface and to provide power to the second wearable device through the second interface based on identifying that the battery level of the first wearable device is less than the first threshold charge level when executed individually or collectively by the at least one processor.The above instructions, when executed individually or collectively by the at least one processor, may cause the charging device to provide power only to the second wearable device through the second interface based on identifying that the battery level of the first wearable device is not lower than the first threshold charge level.

[0217] In some examples, the first threshold charge level may be obtained based on first battery information obtained from the first wearable device while the first wearable device is connected to the charging device through the first interface. The second threshold charge level may be obtained based on second battery information obtained from the second wearable device while the second wearable device is connected to the charging device through the second interface.

[0218] In some examples, the first threshold charging level and the second threshold charging level, respectively, may be determined based on the ratio of the usage of the second cumulative charging time of the second wearable device to the first cumulative charging time of the first wearable device.

[0219] In some examples, the power provided to the second wearable device based on identifying that the battery level is smaller than the first threshold charge level may be smaller than the amount of power provided to the second wearable device based on identifying that the battery level is not smaller than the first threshold charge level.

[0220] In some examples, the instructions may, when executed individually or collectively by the at least one processor, cause the charging device to refrain from providing power to the first wearable device and to provide power to the second wearable device through the second interface based on identifying that the battery level is not lower than the first threshold charge level.

[0221] In some examples, the charging device may further include a power input circuit for obtaining external power. The instructions may cause the charging device to connect the first wearable device and the power input circuit through the first interface and to connect the second wearable device and the power input circuit through the second interface, based on identifying that the battery level is less than the first threshold charge level when executed individually or collectively by the at least one processor. The instructions may cause the charging device to connect only the second wearable device among the first wearable device and the second wearable device to the power input circuit through the second interface, based on identifying that the battery level is not less than the first threshold charge level when executed individually or collectively by the at least one processor.

[0222] In some examples, the charging device may include a battery. The instructions may cause the charging device to identify that the charge level of the battery is greater than a reference charge level when executed individually or collectively by the at least one processor. The instructions may cause the charging device to determine the power to be provided to the second wearable device using the battery based on the charge level of the battery greater than the reference charge level, a second battery level of the second wearable device identified using the second interface, and the second threshold charge level when executed individually or collectively by the at least one processor, and to provide the power to the second wearable device using the battery through the second interface. The instructions may cause the charging device to provide power to the first wearable device using the battery through the first interface after providing power to the second wearable device using the battery when executed individually or collectively by the at least one processor.

[0223] In some examples, the instructions may cause the charging device to identify that the charge level is not greater than the reference charge level when executed individually or collectively by the at least one processor. The instructions may cause the charging device to obtain power from the first wearable device through the first interface based on the charge level that is not greater than the reference charge level when executed individually or collectively by the at least one processor. The instructions may cause the charging device to connect the second wearable device and the first wearable device through the first interface and the second interface based on the obtained power when executed individually or collectively by the at least one processor.

[0224] In some examples, when the instructions are executed individually or collectively by the at least one processor, the charging device may cause the second wearable device and the first wearable device to be connected to obtain first battery information. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the second wearable device and the first wearable device to be disconnected when the third battery level identified from the first battery information is less than the first threshold charge level.

[0225] In some examples, when the instructions are executed individually or collectively by the at least one processor, the charging device may cause the second wearable device to obtain second battery information when the second wearable device and the first wearable device are connected. When the instructions are executed individually or collectively by the at least one processor, the charging device may cause the second wearable device and the first wearable device to disconnect when the third battery level identified from the second battery information is greater than the second threshold charge level.

[0226] A method performed in a charging device having a first interface for connecting to a first wearable device and a second interface for connecting to a second wearable device, as described above, may include an operation of obtaining a first threshold charge level corresponding to the first wearable device using the first interface. The method may include an operation of obtaining a second threshold charge level corresponding to the second wearable device using the second interface. The second threshold charge level may be greater than the first threshold charge level. The method may include an operation of identifying the battery level of the first wearable device. Based on identifying that the battery level of the first wearable device is smaller than the first threshold charge level, the method may include an operation of providing power to the first wearable device through the first interface and providing power to the second wearable device through the second interface. The above method may include an operation of providing power to only the second wearable device through the second interface based on identifying that the battery level of the first wearable device is not lower than the first threshold charge level.

[0227] In some examples, the first threshold charge level may be obtained based on first battery information obtained from the first wearable device while the first wearable device is connected to the charging device through the first interface. The second threshold charge level may be obtained based on second battery information obtained from the second wearable device while the second wearable device is connected to the charging device through the second interface.

[0228] In some examples, the first threshold charging level and the second threshold charging level, respectively, may be determined based on the ratio of the usage of the second cumulative charging time of the second wearable device to the first cumulative charging time of the first wearable device.

[0229] In some examples, the power provided to the second wearable device based on identifying that the battery level is smaller than the first threshold charge level may be smaller than the amount of power provided to the second wearable device based on identifying that the battery level is not smaller than the first threshold charge level.

[0230] In some examples, the method may include refraining from providing power to the first wearable device based on identifying that the battery level is not lower than the first threshold charge level, and providing power to the second wearable device through the second interface.

[0231] In some examples, the charging device may further include a power input circuit for obtaining external power. The method may include the operation of connecting the first wearable device and the power input circuit through the first interface and connecting the second wearable device and the power input circuit through the second interface, based on identifying that the battery level is less than the first threshold charge level. The method may include the operation of connecting only the second wearable device among the first wearable device and the second wearable device to the power input circuit through the second interface, based on identifying that the battery level is not less than the first threshold charge level.

[0232] In some examples, the charging device may include a battery. The method may include an operation of identifying that the charge level of the battery is greater than a reference charge level. The method may include an operation of determining the power to be provided to the second wearable device using the battery based on the charge level of the battery greater than the reference charge level, a second battery level of the second wearable device identified using the second interface, and the second threshold charge level, and an operation of providing the power to the second wearable device through the second interface using the battery. The method may include an operation of providing power to the second wearable device using the battery, and then providing power to the first wearable device through the first interface using the battery.

[0233] In some examples, the method may include an operation of identifying that the charge level is not greater than the reference charge level. The method may include an operation of obtaining power from the first wearable device through the first interface based on the charge level that is not greater than the reference charge level. The method may include an operation of connecting the second wearable device and the first wearable device through the first interface and the second interface based on the obtained power.

[0234] In some examples, the method may include an operation of obtaining first battery information from the first wearable device when the second wearable device and the first wearable device are connected. The method may include an operation of disconnecting the second wearable device and the first wearable device when the third battery level identified from the first battery information is smaller than the first threshold charge level.

[0235] In some examples, the method may include an operation of obtaining second battery information from the second wearable device when the second wearable device and the first wearable device are connected. The method may include an operation of disconnecting the second wearable device and the first wearable device when the third battery level identified from the second battery information is greater than the second threshold charge level.

[0236] In a computer-readable storage medium storing one or more programs as described above, the one or more programs may include instructions that cause the charging device to obtain a first threshold charge level corresponding to the first wearable device using the first interface when executed by the charging device having a first interface for connecting to a first wearable device and a second interface for connecting to a second wearable device. The one or more computer programs may include instructions that cause the charging device to obtain a second threshold charge level corresponding to the second wearable device using the second interface when executed by the charging device. The second threshold charge level may be greater than the first threshold charge level. The charging device may include instructions that cause the charging device to identify the battery level of the first wearable device. The one or more computer programs described above may include instructions that cause the charging device to provide power to the first wearable device through the first interface and to provide power to the second wearable device through the second interface, based on identifying that the battery level of the first wearable device is less than the first threshold charge level when executed by the charging device. The one or more computer programs described above may include instructions that cause the charging device to provide power only to the second wearable device through the second interface, based on identifying that the battery level of the first wearable device is not less than the first threshold charge level when executed by the charging device.

[0237] In some examples, the first threshold charge level may be obtained based on first battery information obtained from the first wearable device while the first wearable device is connected to the charging device through the first interface. The second threshold charge level may be obtained based on second battery information obtained from the second wearable device while the second wearable device is connected to the charging device through the second interface.

[0238] In some examples, the first threshold charging level and the second threshold charging level, respectively, may be determined based on the ratio of the usage of the second cumulative charging time of the second wearable device to the first cumulative charging time of the first wearable device.

[0239] In some examples, the power provided to the second wearable device based on identifying that the battery level is smaller than the first threshold charge level may be smaller than the amount of power provided to the second wearable device based on identifying that the battery level is not smaller than the first threshold charge level.

[0240] In some examples, the one or more computer programs may include instructions that cause the charging device to refrain from providing power to the first wearable device and to provide power to the second wearable device through the second interface, based on identifying that the battery level is not lower than the first threshold charge level when executed by the charging device.

[0241] In some examples, the charging device may further include a power input circuit for obtaining external power. The one or more computer programs may include instructions that cause the charging device to connect the first wearable device and the power input circuit through the first interface and connect the second wearable device and the power input circuit through the second interface, based on identifying that the battery level is less than the first threshold charge level when executed by the charging device. The one or more computer programs may include instructions that cause the charging device to connect only the second wearable device among the first wearable device and the second wearable device to the power input circuit through the second interface, based on identifying that the battery level is not less than the first threshold charge level when executed by the charging device.

[0242] In some examples, the charging device may include a battery. The one or more computer programs may include instructions that cause the charging device to identify that the charge level of the battery is greater than a reference charge level when executed by the charging device. The one or more computer programs may include instructions that cause the charging device to determine the power to be provided to the second wearable device using the battery based on the charge level of the battery that is greater than the reference charge level, a second battery level of the second wearable device identified using the second interface, and the second threshold charge level when executed by the charging device, and to provide the power to the second wearable device using the battery through the second interface. The one or more computer programs may include instructions that cause the charging device to provide power to the second wearable device using the battery after providing power to the second wearable device using the battery when executed by the charging device, and then provide power to the first wearable device using the battery through the first interface.

[0243] In some examples, the one or more computer programs may include instructions that cause the charging device to identify that the charging level is not greater than the reference charging level when executed by the charging device. The one or more computer programs may include instructions that cause the charging device to obtain power from the first wearable device through the first interface based on the charging level that is not greater than the reference charging level when executed by the charging device. The one or more computer programs may include instructions that cause the charging device to connect the second wearable device and the first wearable device through the first interface and the second interface based on the obtained power when executed by the charging device.

[0244] In some examples, the one or more computer programs may include instructions that cause the charging device to obtain first battery information from the first wearable device when the second wearable device and the first wearable device are connected when the charging device is executed. The one or more computer programs may include instructions that cause the charging device to disconnect the second wearable device and the first wearable device when the third battery level identified from the first battery information is less than the first threshold charge level when the charging device is executed.

[0245] In some examples, the one or more computer programs may include instructions that cause the charging device to obtain second battery information from the second wearable device when the second wearable device and the first wearable device are connected when the charging device is executed. The one or more computer programs may include instructions that cause the charging device to disconnect the second wearable device and the first wearable device when the third battery level identified from the second battery information is greater than the second threshold charge level when the charging device is executed.

[0246] The electronic devices according to the various embodiments disclosed in this document may be of various forms. The electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, electronic devices, or consumer electronics. The electronic devices according to the embodiments of this document are not limited to the devices described above.

[0247] In relation to the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of the noun corresponding to an item may include one or more of said items unless the relevant context clearly indicates otherwise. In this document, phrases such as “A or B,” “at least one of A and B,” “at least one of A or B,” “A, B or C,” “at least one of A, B and C,” and “at least one of A, B, or C” may each include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as “first,” “second,” or “first” or “second” may be used simply to distinguish a component from another corresponding component and do not limit the components in any other aspect (e.g., importance or order). Where any (e.g., 1st) component is referred to as “coupled” or “connected” to another (e.g., 2nd) component, with or without the terms “functionally” or “communicationly,” it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0248] The term “module” as used in the 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, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof 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).

[0249] Various embodiments of the present document may be implemented as software (e.g., program (140)) comprising one or more instructions stored in a storage medium (e.g., internal memory (136) or external memory (138)) readable by a machine (e.g., electronic device (101) of FIG. 1). For example, a processor (e.g., processor (120)) of the machine (e.g., electronic device (101)) may call at least one of the one or more instructions stored in the storage medium and execute it. This enables the machine to be operated 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 that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily.

[0250] According to one embodiment, the method according to the various embodiments disclosed herein may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0251] According to various embodiments, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to various embodiments, one or more of the components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to various embodiments, operations performed by the module, program, or other components 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 charging device, A first interface for connecting to a first wearable device; A second interface for connecting to a second wearable device; Memory comprising one or more storage media for storing instructions; and It includes at least one processor comprising a processing circuit, and When the above instructions are executed individually or collectively by the at least one processor, the charging device: A first threshold charge level corresponding to the first wearable device is obtained using the first interface, and A second threshold charging level corresponding to the second wearable device is obtained using the second interface, and the second threshold charging level is greater than the first threshold charging level, Identifying the battery level of the first wearable device, and Based on identifying that the battery level of the first wearable device is lower than the first threshold charge level, power is provided to the first wearable device through the first interface and power is provided to the second wearable device through the second interface, and Causing to provide power only to the second wearable device through the second interface based on identifying that the battery level of the first wearable device is not lower than the first threshold charge level, Charging device.

2. In Claim 1, The first threshold charge level is obtained based on first battery information obtained from the first wearable device while the first wearable device is connected to the charging device through the first interface, and The second threshold charge level is obtained based on second battery information obtained from the second wearable device while the second wearable device is connected to the charging device through the second interface, Charging device.

3. In Claim 2, Each of the above first threshold charging level and the above second threshold charging level is determined based on the usage ratio of the second cumulative charging time of the second wearable device to the first cumulative charging time of the first wearable device, Charging device.

4. In Claim 1, The power provided to the second wearable device based on identifying that the battery level is smaller than the first threshold charge level is smaller than the amount of power provided to the second wearable device based on identifying that the battery level is not smaller than the first threshold charge level. Charging device.

5. In Claim 1, When the above instructions are executed individually or collectively by the at least one processor, the charging device: Based on identifying that the battery level is not lower than the first threshold charge level, refraining from providing power to the first wearable device and causing power to be provided to the second wearable device through the second interface, Charging device.

6. In Claim 1, It further includes a power input circuit for obtaining external power, and When the above instructions are executed individually or collectively by the at least one processor, the charging device: Based on identifying that the battery level is lower than the first threshold charge level, the first wearable device and the power input circuit are connected through the first interface, and the second wearable device and the power input circuit are connected through the second interface, and Based on identifying that the battery level is not lower than the first threshold charge level, causing only the second wearable device among the first wearable device and the second wearable device to be connected to the power input circuit through the second interface. Charging device.

7. In Claim 1, Includes more batteries, When the above instructions are executed individually or collectively by the at least one processor, the charging device: Identify that the charge level of the above battery is greater than the reference charge level, and Based on the charge level of the battery greater than the reference charge level, the second battery level of the second wearable device identified using the second interface, and the second threshold charge level, the power to be provided to the second wearable device using the battery is determined, and the power to be provided to the second wearable device through the second interface using the battery is provided, and After providing power to the second wearable device using the battery, causing power to be provided to the first wearable device through the first interface using the battery, Charging device.

8. In Claim 7, When the above instructions are executed individually or collectively by the at least one processor, the charging device: Identifying that the above charging level is not greater than the above reference charging level, Based on the charging level not greater than the reference charging level, power is obtained from the first wearable device through the first interface, and Causing to connect the second wearable device and the first wearable device through the first interface and the second interface based on the power obtained above, Charging device.

9. In Claim 8, When the above instructions are executed individually or collectively by the at least one processor, the charging device: When the second wearable device and the first wearable device are connected, first battery information is obtained from the first wearable device, and When the third battery level identified from the first battery information is smaller than the first threshold charge level, causing the second wearable device and the first wearable device to be disconnected, Charging device.

10. In Claim 8, When the above instructions are executed individually or collectively by the at least one processor, the charging device: When the second wearable device and the first wearable device are connected, second battery information is obtained from the second wearable device, and When the third battery level identified from the second battery information is greater than the second threshold charge level, causing the second wearable device and the first wearable device to be disconnected, Charging device.

11. A method performed in a charging device having a first interface for connecting to a first wearable device and a second interface for connecting to a second wearable device, wherein The operation of obtaining a first threshold charge level corresponding to the first wearable device using the first interface, An operation of obtaining a second threshold charging level corresponding to the second wearable device using the second interface, wherein the second threshold charging level is greater than the first threshold charging level, An operation to identify the battery level of the first wearable device, and Based on identifying that the battery level of the first wearable device is lower than the first threshold charge level, the operation of providing power to the first wearable device through the first interface and the operation of providing power to the second wearable device through the second interface, and Based on identifying that the battery level of the first wearable device is not lower than the first threshold charge level, the operation of providing power only to the second wearable device through the second interface is included. method.

12. In Claim 11, The first threshold charge level is obtained based on first battery information obtained from the first wearable device while the first wearable device is connected to the charging device through the first interface, and The second threshold charge level is obtained based on second battery information obtained from the second wearable device while the second wearable device is connected to the charging device through the second interface, method.

13. In Claim 12, Each of the above first threshold charging level and the above second threshold charging level is determined based on the usage ratio of the second cumulative charging time of the second wearable device to the first cumulative charging time of the first wearable device, method.

14. In Claim 11, The power provided to the second wearable device based on identifying that the battery level is smaller than the first threshold charge level is smaller than the amount of power provided to the second wearable device based on identifying that the battery level is not smaller than the first threshold charge level. method.

15. In Claim 11, Based on identifying that the battery level is not lower than the first threshold charge level, the method further comprises refraining from providing power to the first wearable device and providing power to the second wearable device through the second interface. method.

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