Wearable device and operation method thereof

Abstract

A wearable device according to an embodiment comprises a camera module for capturing an image of a user's iris, a display module, at least one processor, and a memory for storing at least one instruction executable collectively or individually by the at least one processor. The at least one instruction according to an embodiment may cause the wearable device to: control the display module to output a first screen based on a first color; control the camera module to acquire an eye image of a user while outputting the first screen; divide the eye image into a pupil region and an iris region; acquire first ratio information which is a ratio of an area of the pupil region to an area of the iris region; and if a difference between the first ratio information and first ratio information stored in the memory is smaller than a threshold value, control the display module to switch from the first screen to an authentication screen so as to execute an iris authentication mode.

Description

Wearable device and method of operation thereof The present disclosure relates to a wearable device including an iris authentication function and a method of operating the same. The variety of services and additional features provided through wearable devices, such as AR glasses or video see-through (VST) devices, is steadily increasing. Wearable devices can provide virtual reality (VR), which allows users to experience a realistic computer-generated virtual world; augmented reality (AR), which adds virtual information (or objects) to the real world; and mixed reality (MR), which combines VR and AR. Smartphones generally perform biometric authentication primarily through fingerprint recognition, while wearable devices can perform biometric authentication primarily based on iris recognition due to their characteristics. According to one embodiment, a wearable device includes a camera module for photographing an iris of a user, a display module, at least one processor, and a memory for storing at least one instruction that is executable collectively or individually by the at least one processor. According to one embodiment, at least one instruction may cause the wearable device to: control the display module to output a first screen based on a first color, control the camera module to acquire an eye image of the user while outputting the first screen, distinguish a pupil area and an iris area from the eye image, acquire first ratio information that is a ratio of an area of ​​the pupil area to an area of ​​the iris area, and control the display module to switch from the first screen to an authentication screen to execute an iris authentication mode if a difference between the first ratio information stored in the memory and the first ratio information is less than a threshold value. A method of operating a wearable device according to one embodiment may include an operation of controlling a display module to output a first screen based on a first color, an operation of controlling a camera module to acquire an eye image of a user while outputting the first screen, an operation of distinguishing a pupil region and an iris region from the eye image and acquiring first ratio information that is a ratio of an area of ​​the pupil region and an area of ​​the iris region, and an operation of controlling the display module to switch from the first screen to an authentication screen to execute an iris authentication mode when a difference between the first ratio information stored in a memory and the first ratio information is less than a threshold value. FIG. 1 is a block diagram of an electronic device within a network environment according to one embodiment. FIG. 2 is a perspective view of a wearable device (e.g., an electronic device) according to one embodiment. FIG. 3 is a perspective view illustrating the internal configuration of a wearable device (e.g., an electronic device) according to one embodiment. FIG. 4 is an exploded perspective view of a wearable device (e.g., an electronic device) according to one embodiment. FIGS. 5 and 6 are drawings showing the front and back of a wearable device (e.g., an electronic device) according to one embodiment. Figure 7 illustrates the user's pupil constriction and pupil dilation according to screen brightness. Figure 8 shows the degree of pupil dilation according to individual and left and right eyes. FIG. 9 is a flowchart of an operation method in an iris registration mode of a wearable device according to one embodiment. FIG. 10 illustrates a first screen of a wearable device according to one embodiment. FIG. 11 illustrates a second screen of a wearable device according to one embodiment. Figure 12 is a drawing for explaining the distinction between the pupil area and the iris area in an eye image. Figure 13 is a drawing for explaining the area of ​​the pupil area and the area of ​​the iris area. FIG. 14 is a flowchart of an operation method in a first preliminary authentication process of a wearable device according to one embodiment. Fig. 15 is a flowchart of an operation method in an iris authentication process of a wearable device according to one embodiment. FIG. 16 is a flowchart of an operation method in a secondary preliminary authentication process of a wearable device according to one embodiment. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described in detail below together with the attached drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification. Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in their common sense to those of ordinary skill in the art to which the present invention pertains. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise. The terminology used herein is for the purpose of describing embodiments and is not intended to limit the present invention. In this specification, singular forms also include plural forms, unless specifically stated otherwise. The terms "comprises" and / or "comprising" as used in the specification do not exclude the presence or addition of one or more other components, steps, operations and / or elements. FIG. 1 is a block diagram of an electronic device (101) within a network environment (100) according to various embodiments. Referring to FIG. 1, in the network environment (100), the electronic device (101) may communicate with the electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of the electronic device (104) or the server (108) via a second network (199) (e.g., a long-range wireless communication network). In one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In some embodiments, the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added. In some embodiments, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)). The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or operations. According to one embodiment, as at least a part of the data processing or operations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or an auxiliary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together with the main processor (121). For example, when the electronic device (101) includes the main processor (121) and the auxiliary processor (123), the auxiliary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a given function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as a part thereof. The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure. The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134). The program (140) may be stored as software in the memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146). The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen). The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker. The display module (160) can visually provide information to an external party (e.g., a user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. 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 a force generated by the touch. The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101). The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor. The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) with an external electronic device (e.g., the electronic device (102)). In one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface. The connection terminal (178) may include a connector through which the electronic device (101) may be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector). The haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. According to one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device. The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes. 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 as, for example, at least a part of a power management integrated circuit (PMIC). A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (194) (e.g., a local area network (LAN) communication module, or a power line communication module). Among these communication modules, the corresponding communication module can communicate with an external electronic device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196). The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), an external electronic device (e.g., the electronic device (104)), or a network system (e.g., the second network (199)). According to one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization. The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module (197) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as the first network (198) or the second network (199), may be selected from the plurality of antennas, for example, by the communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device via the at least one selected antenna. In some embodiments, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (197). According to various embodiments, the antenna module (197) may form a mmWave antenna module. In one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band. At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)). According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology. Electronic devices according to the various embodiments disclosed in this document may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to the embodiments of this document are not limited to the aforementioned devices. The various embodiments of this document and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component. The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC). Various embodiments of the present document may be implemented as software (e.g., a program (140)) including one or more instructions stored in a storage medium (e.g., an internal memory (136) or an external memory (138)) readable by a machine (e.g., an electronic device (101)). For example, a processor (e.g., a processor (120)) of the machine (e.g., an electronic device (101)) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium. According to one embodiment, the method according to various embodiments disclosed in this document may be provided as a computer program product. The computer program product may be traded between sellers and buyers 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 may be provided through an application store (e.g., Play Store). TM ) or directly between two user devices (e.g., smart phones), online distribution (e.g., downloading or uploading). In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server. According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added. FIG. 2 is a perspective view of a wearable device (200) according to various embodiments of the present document. Referring to FIG. 2, the wearable device (200) is an electronic device in the form of glasses, which allows a user to visually perceive surrounding objects or the environment while wearing the wearable device (200). For example, the wearable device (200) may be a head-mounted device (HMD) or smart glasses that can directly provide images in front of the user's eyes. The configuration of the wearable device (200) of FIG. 2 may be all or part of the same as the configuration of the electronic device (101) of FIG. 1. According to various embodiments, the wearable device (200) may include a housing (210) that forms the exterior of the wearable device (200). The housing (210) may provide a space in which components of the wearable device (200) may be placed. For example, the housing (210) may include a lens frame (202) and at least one wearing member (203). According to various embodiments, the wearable device (200) may include a display member (201) capable of providing visual information to a user. For example, the display member (201) may include a module equipped with a lens, a display, a waveguide, and / or a touch circuit. According to one embodiment, the display member (201) may be formed transparently or translucently. According to one embodiment, the display member (201) may include a window member whose light transmittance can be adjusted by adjusting the concentration of a translucent glass material or a coloring material. According to one embodiment, the display members (201) may be provided as a pair, and may be arranged to correspond to the left and right eyes of the user, respectively, when the wearable device (200) is worn on the user's body. According to various embodiments, the lens frame (202) can accommodate at least a portion of the indicator member (201). For example, the lens frame (202) can surround at least a portion of an edge of the indicator member (201). In one embodiment, the lens frame (202) can position at least one of the indicator members (201) to correspond to a user's eye. In one embodiment, the lens frame (202) can be a rim of a typical eyeglass structure. In one embodiment, the lens frame (202) can include at least one closed curve surrounding the indicator member (201). According to various embodiments, the wearing member (203) may extend from the lens frame (202). For example, the wearing member (203) may extend from an end of the lens frame (202) and, together with the lens frame (202), may be supported or positioned on the user's body (e.g., an ear). According to one embodiment, the wearing member (203) may be rotatably coupled to the lens frame (202) via a hinge structure (229). According to one embodiment, the wearing member (203) may include an inner side (231c) configured to face the user's body and an outer side (231d) opposite the inner side. According to various embodiments, the wearable device (200) may include a hinge structure (229) configured to fold the wearing member (203) relative to the lens frame (202). The hinge structure (229) may be positioned between the lens frame (202) and the wearing member (203). When the wearable device (200) is not being worn, the user may fold the wearing member (203) so that a portion overlaps the lens frame (202) and carry or store the device. FIG. 3 is a perspective view illustrating the internal configuration of a wearable device according to one embodiment of the present disclosure. FIG. 4 is an exploded perspective view of a wearable device according to one embodiment of the present disclosure. Referring to FIGS. 3 and 4, the wearable device (200) may include components accommodated in a housing (210) (e.g., at least one circuit board (241) (e.g., a printed circuit board (PCB), a printed board assembly (PBA), a flexible PCB (FPCB), or a rigid-flexible PCB (RFPCB)), at least one battery (243), at least one speaker module (245), at least one power transmission structure (246), and / or a camera module (250)). The configuration of the housing (210) of FIG. 3 may be all or part of the same as the configuration of the display member (201), the lens frame (202), the wearing member (203), and the hinge structure (229) of FIG. 2. According to various embodiments, the wearable device (200) may acquire and / or recognize a visual image of an object or environment in a direction (e.g., -Y direction) that the user is looking at or that the wearable device (200) is facing by using a camera module (250) (e.g., the camera module (180) of FIG. 1), and may receive information about the object or environment from an external electronic device (e.g., the electronic device (102, 104) of FIG. 1 or the server (108)) through a network (e.g., the first network (198) or the second network (199) of FIG. 1). In one embodiment, the wearable device (200) may provide the received information about the object or environment to the user in an acoustic or visual form. The wearable device (200) may provide the received information about the object or environment to the user in a visual form through a display member (201) by using a display module (e.g., the display module (160) of FIG. 1). For example, the wearable device (200) can implement augmented reality by visualizing information about objects or the environment and combining it with actual images of the user's surroundings. According to various embodiments, the display member (201) may include a first side (F1) facing a direction in which external light is incident (e.g., -Y direction) and a second side (F2) facing a direction opposite to the first side (F1) (e.g., +Y direction). When a user wears the wearable device (200), at least a portion of light or an image incident through the first side (F1) may pass through the second side (F2) of the display member (201) arranged to face the user's left eye and / or right eye and be incident on the user's left eye and / or right eye. According to various embodiments, the lens frame (202) may include at least two frames. For example, the lens frame (202) may include a first frame (202a) and a second frame (202b). According to one embodiment, when a user wears the wearable device (200), the first frame (202a) may be a frame that faces the user's face, and the second frame (202b) may be a part of the lens frame (202) that is spaced apart from the first frame (202a) in a direction of the user's gaze (e.g., -Y direction). According to various embodiments, the light output module (211) can provide images and / or videos to the user. For example, the light output module (211) can include a display panel (not shown) capable of outputting videos, and a lens (not shown) corresponding to the user's eyes and guiding the videos to the display member (201). For example, the user can obtain videos output from the display panel of the light output module (211) through the lens of the light output module (211). According to various embodiments, the light output module (211) can include a device configured to display various pieces of information. For example, the light output module (211) can include at least one of a liquid crystal display (LCD), a digital mirror device (DMD), a liquid crystal on silicon (LCoS), an organic light emitting diode (OLED), or a micro light emitting diode (micro LED). According to one embodiment, when the light output module (211) and / or the display member (201) includes one of an LCD, a DMD, or an LCoS, the wearable device (200) may include a light source that irradiates light to a display area of ​​the light output module (211) and / or the display member (201). According to one embodiment, when the light output module (211) and / or the display member (201) includes one of an OLED or a micro LED, the wearable device (200) may provide a virtual image to a user without including a separate light source. According to various embodiments, at least a portion of the light output module (211) may be disposed within the housing (210). For example, the light output module (211) may be disposed on the wearable member (203) or the lens frame (202) to correspond to the user's right eye and left eye, respectively. According to one embodiment, the light output module (211) may be connected to the display member (201) and provide an image to the user through the display member (201). According to various embodiments, the circuit board (241) may include components for driving the wearable device (200). For example, the circuit board (241) may include at least one integrated circuit chip, and at least one of the processor (120), the memory (130), the power management module (188), or the communication module (190) of FIG. 1 may be provided to the integrated circuit chip. According to one embodiment, the circuit board (241) may be disposed within the wearing member (203) of the housing (210). According to one embodiment, the circuit board (241) may be electrically connected to the battery (243) through the power transmission structure (246). According to one embodiment, the circuit board (241) is connected to a flexible printed circuit board (205) and can transmit electrical signals to electronic components of the electronic device (e.g., a light output module (211), a camera module (250), and a light emitting unit) through the flexible printed circuit board (205). According to one embodiment, the circuit board (241) may be a circuit board including an interposer. According to various embodiments, the flexible printed circuit board (205) may extend from the circuit board (241) across the hinge structure (229) into the interior of the lens frame (202) and may be disposed around at least a portion of the perimeter of the indicator member (201) within the lens frame (202). According to various embodiments, the battery (243) (e.g., battery (189) of FIG. 1) may be electrically connected to components of the wearable device (200) (e.g., light output module (211), circuit board (241), speaker module (245), microphone module (247), and / or camera module (250)) and may supply power to the components of the wearable device (200). According to various embodiments, at least a portion of the battery (243) may be disposed on the wearable member (203). In one embodiment, the battery (243) may be disposed on an end (203a, 203b) of the wearable member (203). For example, the battery (243) may include a first battery (243a) disposed on a first end (203a) of the wearable member (203) and a second battery (243b) disposed on a second end (203b). According to various embodiments, the speaker module (245) (e.g., the audio module (170) or the sound output module (155) of FIG. 1) may convert an electrical signal into sound. At least a portion of the speaker module (245) may be disposed within the wearable member (203) of the housing (210). In one embodiment, the speaker module (245) may be positioned within the wearable member (203) so as to correspond to the user's ear. For example, the speaker module (245) may be disposed between the circuit board (241) and the battery (243). According to various embodiments, the power transmission structure (246) can transmit power from the battery (243) to an electronic component (e.g., an optical output module (211)) of the wearable device (200). For example, the power transmission structure (246) is electrically connected to the battery (243) and / or the circuit board (241), and the circuit board (241) can transmit power received through the power transmission structure (246) to the optical output module (211). According to one embodiment, the power transmission structure (246) can be connected to the circuit board (241) through the speaker module (245). For example, when the wearable device (200) is viewed from the side (e.g., in the Z-axis direction), the power transmission structure (246) can at least partially overlap the speaker module (245). According to various embodiments, the power transmission structure (246) may be a configuration capable of transmitting power. For example, the power transmission structure (246) may include a flexible printed circuit board or wires. For example, the wires may include a plurality of cables (not shown). In various embodiments, the shape of the power transmission structure (246) may be varied in various ways, taking into account the number and / or type of cables. According to various embodiments, the microphone module (247) (e.g., the input module (150) and / or the audio module (170) of FIG. 1) may convert sound into an electrical signal. According to one embodiment, the microphone module (247) may be disposed on at least a portion of the lens frame (202). For example, at least one microphone module (247) may be disposed on the bottom (e.g., in the direction toward the -X axis) and / or the top (e.g., in the direction toward the X axis) of the wearable device (200). According to various embodiments, the wearable device (200) may recognize the user's voice more clearly by using voice information (e.g., sound) acquired from the at least one microphone module (247). For example, the wearable device (200) may distinguish voice information from ambient noise based on the acquired voice information and / or additional information (e.g., low-frequency vibration of the user's skin and bones). For example, the wearable device (200) can clearly recognize the user's voice and perform a function of reducing ambient noise (e.g., noise cancellation). The microphone module (247) according to various embodiments of the present document may include multiple microphone modules (247) to perform beamforming. The microphone module (247) according to various embodiments of the present document may include an omnidirectional or directional microphone. According to various embodiments, the camera module (250) can capture still images and / or moving images. The camera module (250) may include at least one of a lens, at least one image sensor, an image signal processor, or a flash. According to one embodiment, the camera module (250) may be disposed within a lens frame (202) and may be disposed around the display member (201). According to various embodiments, the camera module (250) may include at least one first camera module (251). In one embodiment, the first camera module (251) may capture a trajectory of a user's eye (e.g., pupil) or gaze. For example, the first camera module (251) may capture a reflection pattern of light emitted by a light emitting unit toward the user's eye. For example, the light emitting unit may emit light in an infrared band for tracking a trajectory of gaze using the first camera module (251). For example, the light emitting unit may include an IR LED. In one embodiment, a processor (e.g., processor (120) of FIG. 1) may adjust the position of the virtual image projected on the display member (201) so that the virtual image corresponds to a direction in which the user's pupil is looking. According to one embodiment, the first camera module (251) may include a global shutter (GS) type camera, and may track the trajectory of the user's eyes or gaze using a plurality of first camera modules (251) having the same specifications and performance. According to various embodiments, the first camera module (251) may periodically or aperiodically transmit information related to the trajectory of the user's eyes or gaze (e.g., trajectory information) to a processor (e.g., processor (120) of FIG. 1). According to one embodiment, the first camera module (251) may transmit the trajectory information to the processor when it detects that the user's gaze has changed (e.g., the eyes move more than a reference value while the head is still) based on the trajectory information. According to various embodiments, the camera module (250) may include a second camera module (253). According to one embodiment, the second camera module (253) may capture external images. According to one embodiment, the second camera module (253) may be a camera of a global shutter type or a rolling shutter (RS) type. According to one embodiment, the second camera module (253) may capture external images through a second optical hole (223) formed in the second frame (202b). For example, the second camera module (253) may include a high-resolution color camera and may be a high-resolution (HR) or photo video (PV) camera. In addition, the second camera module (253) may provide an auto focus (AF) function and an optical image stabilizer (OIS) function. According to various embodiments, the wearable device (200) may include a flash (not shown) positioned adjacent to the second camera module (253). For example, the flash (not shown) may provide light to increase the brightness (e.g., illuminance) around the wearable device (200) when the second camera module (253) acquires an external image, and may reduce difficulties in acquiring images due to dark environments, mixing of various light sources, and / or reflection of light. According to various embodiments, the camera module (250) may include at least one third camera module (255). According to one embodiment, the third camera module (255) may capture a user's action through the first optical hole (221) formed in the lens frame (202). For example, the third camera module (255) may capture a user's gesture (e.g., hand motion). The third camera module (255) and / or the first optical hole (221) may be respectively disposed at opposite side ends of the lens frame (202) (e.g., the second frame (202b)), for example, at opposite ends of the lens frame (202) (e.g., the second frame (202b)) in the X direction. According to one embodiment, the third camera module (255) may be a global shutter (GS) type camera. For example, the third camera module (255) can provide 360-degree space (e.g., omnidirectional), position recognition and / or movement recognition with a camera that supports 3DoF (degrees of freedom) or 6DoF. According to one embodiment, the third camera module (255) can perform a movement path tracking function (simultaneous localization and mapping, SLAM) and a user movement recognition function using a plurality of global shutter type cameras with the same specifications and performance as a stereo camera. According to one embodiment, the third camera module (255) can include an infrared (IR) camera (e.g., a time of flight (TOF) camera or a structured light camera). For example, the IR camera can operate as at least a part of a sensor module (e.g., the sensor module (176) of FIG. 1) for detecting a distance to a subject. According to one embodiment, at least one of the first camera module (251) or the third camera module (255) may be replaced with a sensor module (e.g., the sensor module (176) of FIG. 1) (e.g., a Lidar sensor). For example, the sensor module may include at least one of a vertical cavity surface emitting laser (VCSEL), an infrared sensor, and / or a photodiode. For example, the photodiode may include a positive intrinsic negative (PIN) photodiode or an avalanche photodiode (APD). The photodiode may be referred to as a photo detector or a photo sensor. According to one embodiment, at least one of the first camera module (251), the second camera module (253), or the third camera module (255) may include a plurality of camera modules (not shown). For example, the second camera module (253) may be configured with a plurality of lenses (e.g., wide-angle and telephoto lenses) and image sensors and may be arranged on one side (e.g., the side facing the -Y axis) of the wearable device (200). For example, the wearable device (200) may include a plurality of camera modules, each having a different property (e.g., angle of view) or function, and may be controlled to change the angle of view of the camera module based on a user's selection and / or trajectory information. For example, at least one of the plurality of camera modules may be a wide-angle camera, and at least another may be a telephoto camera. According to various embodiments, a processor (e.g., processor (120) of FIG. 1) may determine movement of the wearable device (200) and / or movement of the user by using information of the wearable device (200) acquired using at least one of a gesture sensor, a gyro sensor, or an acceleration sensor of a sensor module (e.g., sensor module (176) of FIG. 1) and a user's motion (e.g., approach of the user's body to the wearable device (200)) acquired using a second camera module (253). According to one embodiment, the wearable device (200) may include, in addition to the described sensors, a magnetic (geomagnetic) sensor capable of measuring direction using a magnetic field and magnetic lines, and / or a Hall sensor capable of acquiring movement information (e.g., direction of movement or distance of movement) using the strength of a magnetic field. For example, the processor can determine movement of the wearable device (200) and / or movement of the user based on information obtained from a magnetic (geomagnetic) sensor and / or a Hall sensor. According to various embodiments (not shown), the wearable device (200) can perform an input function (e.g., a touch and / or pressure sensing function) that enables interaction with a user. For example, a component configured to perform a touch and / or pressure sensing function (e.g., a touch sensor and / or a pressure sensor) may be disposed on at least a portion of the wearable member (203). The wearable device (200) can control a virtual image output through the display member (201) based on information acquired through the component. For example, the sensor related to the touch and / or pressure sensing function may be configured in various ways, such as a resistive type, a capacitive type, an electromagnetic induction (EM) type, or an optical type. According to one embodiment, the component configured to perform the touch and / or pressure sensing function may be all or partly identical to the configuration of the input module (150) of FIG. 1. According to various embodiments, the wearable device (200) may include a reinforcing member (260) disposed in the internal space of the lens frame (202) and formed to have a stiffness higher than the stiffness of the lens frame (202). According to various embodiments, the wearable device (200) may include a lens structure (270). The lens structure (270) may refract at least a portion of light. For example, the lens structure (270) may be a prescription lens having refractive power. According to one embodiment, the lens structure (270) may be positioned behind (e.g., in the +Y direction) the second window member of the display member (201). For example, the lens structure (270) may be positioned between the display member (201) and the user's eye. For example, the lens structure (270) may face the display member. According to various embodiments, the housing (210) may include a hinge cover (227) that may conceal a portion of the hinge structure (229). Another portion of the hinge structure (229) may be accommodated or concealed between the inner case (231) and the outer case (233), which will be described later. According to various embodiments, the wearable member (203) may include an inner case (231) and an outer case (233). The inner case (231) is, for example, a case configured to face the user's body or to come into direct contact with the user's body, and may be made of a material having low thermal conductivity, for example, a synthetic resin. According to one embodiment, the inner case (231) may include an inner side (e.g., an inner side (231c) of FIG. 2) that faces the user's body. The outer case (233) may include, for example, a material capable of at least partially transmitting heat (e.g., a metal material) and may be coupled to face the inner case (231). According to one embodiment, the outer case (233) may include an outer side (e.g., an outer side (231d) of FIG. 2) that is opposite the inner side (231c). In one embodiment, at least one of the circuit board (241) or the speaker module (245) may be accommodated in a space separated from the battery (243) within the wearable member (203). In the illustrated embodiment, the inner case (231) may include a first case (231a) including the circuit board (241) or the speaker module (245) and a second case (231b) accommodating the battery (243), and the outer case (233) may include a third case (233a) coupled to face the first case (231a) and a fourth case (233b) coupled to face the second case (231b). For example, a first case (231a) and a third case (233a) may be combined (hereinafter, “first case portion (231a, 233a)”) to accommodate a circuit board (241) and / or a speaker module (245), and a second case (231b) and a fourth case (233b) may be combined (hereinafter, “second case portion (231b, 233b)”) to accommodate a battery (243). According to various embodiments, the first case portion (231a, 233a) is rotatably connected to the lens frame (202) via a hinge structure (229), and the second case portion (231b, 233b) can be connected or mounted to an end of the first case portion (231a, 233a) via a connecting member (235). In some embodiments, among the connecting members (235), a portion that comes into contact with the user's body can be made of a material having low thermal conductivity, for example, an elastic material such as silicone, polyurethane, or rubber, and a portion that does not come into contact with the user's body can be made of a material having high thermal conductivity, for example, a metal material. For example, when heat is generated in the circuit board (241) or the battery (243), the connecting member (235) can block the heat from being transferred to the portion that comes into contact with the user's body, and can disperse or release the heat through the portion that does not come into contact with the user's body. According to one embodiment, a portion of the connecting member (235) that is configured to come into contact with the user's body may be interpreted as a part of the inner case (231), and a portion of the connecting member (235) that is not configured to come into contact with the user's body may be interpreted as a part of the outer case (233). According to one embodiment (not shown), the first case (231a) and the second case (231b) may be configured as an integral body without the connecting member (235), and the third case (233a) and the fourth case (233b) may be configured as an integral body without the connecting member (235). According to various embodiments, in addition to the illustrated components, other components (e.g., the antenna module (197) of FIG. 1) may be further included, and information about objects or environments may be provided from an external electronic device (e.g., the electronic device (102, 104) or server (108) of FIG. 1) through a network (e.g., the first network (198) or the second network (199) of FIG. 1) using the communication module (190). In FIGS. 2 to 4, only the wearable device (200) is illustrated and described, but it is not limited thereto, and some components of the wearable device (200) illustrated in FIGS. 2 to 4 may also be included in electronic devices such as smartphones and tablet PCs.

[0071] The wearable device (200) according to various embodiments of the present document can identify whether the user (210) is wearing the wearable device (100) through a proximity sensor included in the wearable device (200). Alternatively, the wearable device (200) according to various embodiments of the present document can determine whether the wearable device (200) is worn by the user (210) based on whether the frame of the wearable device (200) is unfolded (e.g., unfolded state) and whether proximity of the user (210) is detected while the frame of the wearable device (200) is unfolded, through an angle sensor provided in a hinge portion of the wearable device (200). FIG. 5 and FIG. 6 are drawings showing the front and back of a wearable device (200) according to one embodiment. Referring to FIGS. 5 and 6, in one embodiment, camera modules (311, 312, 313, 314, 315, 316) and / or depth sensors (317) for obtaining information related to the surrounding environment of the wearable device (200) may be arranged on the first surface (310) of the housing. In one embodiment, the camera modules (311, 312) can acquire images related to the environment surrounding the wearable electronic device. In one embodiment, the camera modules (313, 314, 315, 316) can acquire images while the wearable electronic device is worn by a user. The images acquired through the camera modules (313, 314, 315, 316) can be used for simultaneous localization and mapping (SLAM), 6 degrees of freedom (6DoF), 3 degrees of freedom (3DoF), object recognition, and / or tracking, and can recognize and / or track the user's hand and use it as input for the wearable electronic device. In one embodiment, the depth sensor (317) may be configured to transmit a signal and receive a signal reflected from a subject, and may be used for purposes such as determining the distance to an object, such as time of flight (TOF). According to one embodiment, a camera module (325, 326) for facial recognition and / or a display (321) (and / or a lens) may be disposed on the second side (320) of the housing. In one embodiment, a face recognition camera module (325, 326) adjacent to the display may be used to recognize a user's face, or may recognize and / or track both eyes of the user. In one embodiment, the display (321) (and / or lens) may be disposed on the second side (320) of the wearable device (200). In one embodiment, the wearable device (200) may not include camera modules (315, 316) among the plurality of camera modules (313, 314, 315, 316). Although not illustrated in FIGS. 3A and 3B , the wearable device (200) may further include at least one of the configurations illustrated in FIG. 2 . As described above, according to one embodiment, the wearable device (200) may have a form factor for being worn on a user's head. The wearable device (200) may further include a strap for being fixed on a body part of the user, and / or a wearing member (e.g., a wearing member (203)). The wearable device (200) may provide a user experience based on augmented reality, virtual reality, and / or mixed reality while being worn on the user's head. Meanwhile, according to one embodiment, a wearable device (200) can block external light while worn on a user's head, and can cause pupil dilation or constriction by adjusting the color (and / or brightness) of the display (321) (and / or lens). The invention according to the disclosure can utilize the characteristic that the degree of pupillary reflection varies for each user in iris authentication and / or a preliminary process for iris authentication. Figure 7 shows the user's pupil constriction and pupil dilation according to screen brightness, and Figure 8 shows the degree of pupil dilation according to individual and left and right eyes. Normally, the size of a human pupil ranges from 2 to 8 mm. In a dark place (5 lux), the average pupil size increases to about 8 mm on average, and in a bright place (1200 lux, outdoors), the average minimum pupil size becomes about 2 to 4 mm. In addition, depending on the brightness environment, different pupillary reflexes occur for each individual, and the maximum and minimum sizes of the pupils operate differently for each individual. Referring to Figure 7, the pupil constricts in bright light, and as the pupil constricts, the size of the pupil area decreases. At this time, as the pupil area decreases, the size of the iris area increases. Conversely, the pupil dilates in dark light, and as the pupil dilates, the size of the pupil area increases. At this time, as the pupil area increases, the size of the iris area decreases. In general, iris authentication is performed by recognizing a unique pattern included in an iris region excluding the pupil region, but in the present disclosure, iris authentication can be performed based on the ratio between the size of the pupil region and the size of the iris region in addition to the unique pattern of the iris region. The degree to which the pupil constricts or dilates varies from person to person, and even in the same person, the degree to which the pupil constricts or dilates may differ depending on whether it is the left or right eye. Figure 8 illustrates the pupil size ratios for the left and right eyes of the first and second users, respectively, by color. For the first user, pupils of different colors (and / or brightnesses) have different pupil size ratios, and even for the same color, the pupil size ratios may differ depending on whether the left or right eye is used. Furthermore, for the same color, the first and second users may have different pupil size ratios. Meanwhile, the following describes various embodiments of iris authentication or iris preliminary authentication using the characteristics of pupil dilation and contraction for each individual and / or left and right eyes. FIG. 9 is a flowchart illustrating an operation method in an iris registration mode of a wearable device according to one embodiment. FIG. 10 illustrates a first screen of a wearable device according to one embodiment. FIG. 11 illustrates a second screen of a wearable device according to one embodiment. FIG. 12 is a diagram illustrating the distinction between a pupil region and an iris region in an eye image. FIG. 13 is a diagram illustrating the area of ​​a pupil region and an iris region. According to one embodiment, the processor (120) can detect that the user is wearing the wearable device (200) (901). For example, the processor (120) can identify whether the user is wearing the wearable device (200) through a proximity sensor included in the wearable device (200). In addition, the wearable device (200) can determine whether the wearable device (200) is being worn by the user based on whether the frame of the wearable device (200) is unfolded (e.g., unfolded) and whether proximity of the user is detected while the frame of the wearable device (200) is unfolded, through an angle sensor provided in the hinge portion of the wearable device (200). According to one embodiment, when the processor (120) detects that the user is wearing the wearable device (200), it can execute an iris registration mode (903) and output a first screen based on a first color while the iris registration mode is executed (905). According to one embodiment, the iris registration mode can be executed automatically before an iris template for iris authentication is stored in the wearable device (200), or can be executed manually by the user through an operation on the wearable device (200). Referring to FIG. 10, the first screen (1000) output initially in the iris registration mode may include a background screen of a black series (e.g., color code - 0x222222). The display (321 of FIG. 6) (and / or lens) may output a UI and a message that causes the user to look at the camera (the first camera module (251) of FIG. 3) along with the background screen having the first color. According to one embodiment, the camera may acquire the user's first eye image while outputting the first screen. According to one embodiment, the processor (120) can obtain the area of ​​the first pupil region based on the first eye image (907) and obtain the area of ​​the first iris region based on the first eye image (909). The processor (120) can distinguish between the pupil region and the iris region through a pupil detection algorithm stored in the memory (130). Referring to FIG. 12, a processor (120) according to one embodiment sets an area including an iris and a pupil in an eye image as a region of interest (ROI), and can distinguish between a pupil area (P) and an iris area (I). Once the pupil area (P) and the iris area (I) are distinguished, a common center point can be detected, and the radius of the pupil area (P) and the radius of the iris area (I) can be confirmed. Referring to FIG. 13, a processor (120) according to one embodiment can calculate an area of ​​a pupil region (SP = 3.14 * (radius of the pupil region)^2) based on a radius of a pupil region (P). A processor (120) according to one embodiment can calculate an area of ​​an iris region (SI = 3.14 * (radius of the iris region)^2) based on a radius of an iris region (I). According to one embodiment, the processor (120) may store first ratio information on the first screen (911). The first ratio information may reflect the user's pupil reflection characteristics based on the first color output from the first screen. That is, the first ratio information refers to the ratio of the area (SP) of the first pupil area and the area (SI) of the first iris area when the user's eye reacts to the first color. The first ratio information may be information on either the user's left eye or right eye, or may include ratio information for the left eye and the right eye, respectively. When the first ratio information includes ratio information for both the left eye and the right eye, the camera according to one embodiment may acquire the left eye image and the right eye image simultaneously, or may acquire the left eye image and the right eye image at different times by repeating operations 905 to 911. In addition, when acquiring the left eye image and the right eye image at different times, the background color when acquiring the left eye image may be set differently from the background color when acquiring the right eye image. According to one embodiment, after storing the first ratio information, the processor (120) may output a second screen based on the second color (913). According to one embodiment, after storing the first ratio information, the processor (120) may control the display (321 of FIG. 6) (and / or the lens) to switch from the first screen to the second screen. Meanwhile, the first screen and the second screen may have different colors as well as different brightness and / or saturation. For example, the first screen may have a lower brightness value than the second screen, or the first screen may have a higher saturation value than the second screen. Referring to FIG. 11, the second screen (1100) may include a background screen in a gray color series (e.g., color code - 0xDDDDDD). The display (321 of FIG. 6) (and / or the lens) may output a UI and message that directs the user to look at the camera (the first camera module (251) of FIG. 3) along with the background screen having the second color. In one embodiment, the camera may acquire a second eye image of the user while outputting the second screen. According to one embodiment, the processor (120) may obtain the area of ​​the second pupil region based on the second eye image (915) and obtain the area of ​​the second iris region based on the second eye image (917). At this time, since the second screen outputs a background screen with a relatively brighter color than the first screen, the area of ​​the second pupil region may have a smaller value than the area of ​​the first pupil region. The processor (120) may distinguish between the pupil region and the iris region through a pupil detection algorithm stored in the memory (130). According to one embodiment, the processor (120) may store second ratio information on the second screen (919). The second ratio information may reflect the user's pupillary reflection characteristics based on the second color output from the second screen. That is, the second ratio information refers to the ratio of the area of ​​the second pupil area (SP) to the area of ​​the second iris area (SI) when the user's eye reacts to the second color. According to one embodiment, the processor (120) may store a first iris template and a second iris template in the memory (130) together with the first ratio information and the second ratio information (923). The iris template refers to an iris code stored for iris authentication after the iris registration process. The first iris template is an iris code in an iris area that reacts to a first color, and the second iris template corresponds to an iris code in an iris area that reacts to a second color. Since a relatively large pupil dilation occurs when the first color is used and the area of ​​the iris area is smaller, the iris code of the first iris template has smaller data than the iris code of the second iris template. Meanwhile, additionally, the processor (120) according to one embodiment may store the second iris template and the second ratio information, and change the color of the screen of the display (321 of FIG. 6) to the Nth color (Nth screen) to additionally store the Nth ratio information and the Nth iris template (921). Meanwhile, the above described iris registration mode in which the user's pupil stores first ratio information and a first iris template when reacting to a first color, and second ratio information and a second iris template when reacting to a second color different from the first color. Hereinafter, a process for performing iris preliminary authentication and / or iris authentication based on the stored first ratio information, first iris template, second ratio information, and second iris template is described. FIG. 14 is a flowchart of an operation method in a first preliminary authentication process of a wearable device according to one embodiment. Each operation of FIG. 14 may be performed after the iris registration process according to FIG. 9 is fully performed. Accordingly, the operation of FIG. 14 may be performed only after at least one of the first ratio information / first iris template or the second ratio information / second iris template is stored in the memory (130), and when at least one of the first ratio information / first iris template or the second ratio information / second iris template is not stored in the memory (130), operation 901 of FIG. 9 may be executed. According to one embodiment, the processor (120) can detect that the user is wearing the wearable device (200) (1401). For example, the processor (120) can identify whether the user is wearing the wearable device (200) through a proximity sensor included in the wearable device (200). In addition, the wearable device (200) can determine whether the wearable device (200) is worn by the user through an angle sensor provided in a hinge portion of the wearable device (200) based on whether the frame of the wearable device (200) is unfolded (e.g., unfolded state) and whether proximity of the user is detected while the frame of the wearable device (200) is unfolded. According to one embodiment, when the processor (120) detects that the user is wearing the wearable device (200), it may output a first screen based on a first color (1403). The first screen may be a screen for iris authentication or iris preliminary authentication, and may be distinct from the operation 903 of FIG. 9 for iris registration, but may also be the same as the first color-based screen used in operation 905 of FIG. 9. According to one embodiment, the processor (120) can control a camera module (the first camera module (251) of FIG. 3) to acquire an image of the user's eye (1405). The image of the eye can include at least one of a left eye image or a right eye image of the user. According to one embodiment, the processor (120) can obtain first ratio information through the acquired eye image (1407). The process of obtaining the first ratio information may refer to operations 907 to 911 of FIG. 9. According to one embodiment, when the processor (120) obtains first ratio information through the user's eye image, it can check whether the difference (hereinafter, difference value) between the first ratio information stored in the memory (130) and the first ratio information obtained in operation 1407 is greater than or less than a threshold value (1409). According to one embodiment, the processor (120) may execute the iris authentication mode if the difference value is less than the threshold value (1411). Here, the difference value being less than the threshold value means that the degree of pupil dilation (or constriction) due to the first color is substantially the same as the degree of pupil dilation (or constriction) based on the registered iris information, and thus the user attempting authentication and the registered user are the same. Therefore, the processor (120) according to one embodiment may execute the iris authentication mode if the difference value is less than the threshold value (1411). The processor (120) according to one embodiment may perform iris authentication while maintaining the first color as it is in order to execute the iris authentication mode (A-> 1501 of FIG. 15). In addition, the processor (120) according to one embodiment may perform iris authentication while converting the first color to the second color in order to execute the iris authentication mode (A-> 1601 of FIG. 16). According to one embodiment, the processor (120) may not execute the iris authentication mode if the difference value is greater than the threshold value (operation 1609 of FIG. 16). Here, the difference value being greater than the threshold value means that the degree of pupil dilation (or constriction) by the first color is different from the degree of pupil dilation (or constriction) based on the registered iris information, and thus there is a mismatch between the user attempting authentication and the registered user. According to one embodiment, the processor (120) may switch the state of the display (321 in FIG. 6) from a black state to a disabled state so that the iris authentication mode is not executed when the difference value is greater than the threshold value. Here, the black state is a state in which the DDI driving current and the panel driving current of the display are on and the light-emitting element current of the display is off, and the disabled state is a state in which the DDI driving current of the display is on and the panel driving current and the light-emitting element current of the display are off. In the present embodiment, the wearable device (200) does not perform iris authentication immediately when the user wears the wearable device (200), but performs iris authentication through preliminary authentication, thereby reducing battery consumption due to iris authentication. Conversely, when the iris authentication mode is executed, the display (321 in FIG. 6) may switch the DDI driving current, the panel driving current, and the light-emitting element current of the display to all on. Fig. 15 is a flowchart of an operation method in an iris authentication process of a wearable device according to one embodiment. According to one embodiment, the processor (120) may perform normalization (1501) on an iris image (eye image) acquired through a camera module (the first camera module (251) of FIG. 3). For example, the processor (120) may generate a pattern included in the iris image in polar coordinates and convert it from polar coordinates to orthogonal coordinates. According to one embodiment, the processor (120) can perform iris feature extraction from an iris image (1503). The processor (120) can extract key features by analyzing a unique pattern included in the iris. For example, the processor (120) can extract iris feature points by applying a Gabor Wavelets Filter to an iris image that has undergone normalization. The Gabor Wavelets Filter is a feature point extraction method through spatial-frequency analysis, and is a method of extracting features of an iris pattern by utilizing changes in iris brightness (0 if negative, 1 if positive). According to one embodiment, the processor (120) can perform iris matching. For example, the processor (120) can perform iris matching by comparing the first iris code acquired in operation 1503 with the second iris code of the iris template stored in the memory (130) during iris registration (1505). The processor (120) can determine whether the first iris code and the second iris code are the same by using the Hamming distance or the Euclidean distance between them. According to one embodiment, the processor (120) may complete iris authentication through operation 1505 (1507). The processor (120) may cause the authentication system of the wearable device (200) to notify the user of whether the authentication was successful or failed. FIG. 16 is a flowchart of an operation method in a secondary preliminary authentication process of a wearable device according to one embodiment. Looking back at the iris registration process of FIG. 8, the wearable device (200) according to one embodiment can store first ratio information and a first iris template in a first screen based on a first color and second ratio information and a second iris template in a second screen based on a second color in the memory (130). That is, the wearable device (200) can perform iris authentication without performing iris authentication that compares iris patterns by taking advantage of the fact that the degree of pupil dilation (or constriction) is different depending on the color (or brightness), or can increase the security of iris authentication by additionally checking the degree of pupil dilation (or constriction) before identifying the iris pattern. According to one embodiment, the processor (120) may output a second screen based on a second color (1601). The second screen may be a screen for iris preliminary authentication and may be distinguished from operation 913 of FIG. 9 for iris registration. The second screen may have a background color (or brightness) different from that of the first screen. According to one embodiment, the processor (120) can control a camera module (the first camera module (251) of FIG. 3) to acquire an eye image of the user (1603). The eye image can include at least one of a left eye image or a right eye image of the user. According to one embodiment, the processor (120) may obtain second ratio information through the user's eye image (1605). The process of obtaining the second ratio information may refer to operations 915 to 919 of FIG. 9. According to one embodiment, when the processor (120) obtains second ratio information through the user's eye image, it can check whether the difference (hereinafter, difference value) between the second ratio information stored in the memory (130) and the second ratio information obtained in operation 1605 is greater than or less than a threshold value (1607). According to one embodiment, the processor (120) may execute the iris authentication mode (1611) if the difference value is less than the threshold value. Here, the difference value being less than the threshold value means that the degree of pupil dilation (or constriction) by the second color is substantially the same as the degree of pupil dilation (or constriction) based on the registered iris information, so that the user attempting authentication is the same as the registered user. It should be noted here that the user has first passed the verification for the first ratio information and then passed the verification for the second ratio information. If the iris authentication mode is executed after additionally performing the verification for the second ratio information, it can have higher security than the existing iris authentication process that only performs iris authentication. Additionally, according to one embodiment, the processor (120) may process iris authentication as complete if the difference value is less than a threshold value. That is, in the present embodiment, user authentication can be completed without comparing iris patterns. According to one embodiment, the processor (120) may not execute the iris authentication mode if the difference value is greater than the threshold value (1609). Here, the difference value being greater than the threshold value means that the degree of pupil dilation (or constriction) by the first color is different from the degree of pupil dilation (or constriction) based on the registered iris information, and thus there is a mismatch between the user attempting authentication and the registered user. According to one embodiment, the processor (120) may not execute the iris authentication mode if the difference value is greater than the threshold value based on the first ratio information, or may not execute the iris authentication mode if the preliminary authentication based on the second ratio information does not pass after the preliminary authentication based on the first ratio information passes. According to one embodiment, if the difference between the second ratio information stored in the memory and the second ratio information is greater than the threshold value, the processor (120) may notify that the iris authentication has failed and terminate the second screen so that the display module is deactivated (the iris authentication mode is not executed). A wearable device (200 of FIGS. 2 to 6) according to one embodiment includes a camera module (251 of FIGS. 3 and 4) for photographing a user's iris, a display module (321 of FIG. 6), at least one processor (120 of FIG. 1), and a memory (130 of FIG. 1) for storing at least one instruction that can be collectively or individually executed by the at least one processor. At least one instruction according to one embodiment may cause the wearable device to: control the display module to output a first screen based on a first color; control the camera module to acquire an eye image of the user while outputting the first screen; distinguish a pupil region and an iris region from the eye image; acquire first ratio information that is a ratio of an area of ​​the pupil region to an area of ​​the iris region; and control the display module to switch from the first screen to an authentication screen to execute an iris authentication mode if a difference between the first ratio information stored in the memory and the first ratio information is less than a threshold value. According to one embodiment, at least one instruction may terminate the first screen so that the display module is inactive if a difference between the first ratio information stored in the memory and the first ratio information is greater than a threshold value. According to one embodiment, at least one instruction may: control the display module to output a first screen based on a first color while the iris enrollment mode is running. According to one embodiment, at least one instruction may: control the camera module to acquire a first eye image of the user, distinguish a first pupil region and a first iris region from the first eye image, acquire an area of ​​the first pupil region and an area of ​​the first iris region, store first ratio information, which is a ratio of the area of ​​the first pupil region and the area of ​​the first iris region, in a memory, and control the display module to switch from the first screen to a second screen based on a second color. According to one embodiment, at least one instruction may: control a camera module to acquire a second eye image of the user while outputting a second screen; distinguish a second pupil region and a second iris region from the second eye image; acquire an area of ​​the second pupil region and an area of ​​the second iris region; store second ratio information, which is a ratio of the area of ​​the second pupil region and the area of ​​the second iris region, in a memory; and store a first iris template corresponding to the first eye image and a second iris template corresponding to the second eye image together with the first ratio information and the second ratio information in the memory. In one embodiment, the first screen may output a first color that is black, and the second screen may output a second color that is gray. According to one embodiment, at least one instruction may store a first iris template in which feature points are extracted from a first iris region in the memory, and store a second iris template in which feature points are extracted from a second iris region in the memory. According to one embodiment, at least one instruction may be configured to: control a camera module to acquire a first eye image of a user while outputting a first screen, with a first iris template and a second iris template stored; distinguish a first pupil region and a first iris region from the first eye image; acquire first ratio information which is a ratio of an area of ​​the first pupil region to an area of ​​the first iris region; and, if a difference between the first ratio information stored in a memory and the first ratio information is less than a threshold value, control a display module to switch from the first screen to a second screen to execute an iris authentication mode; and control a camera module to acquire a second eye image of the user while outputting a second screen, distinguish a second pupil region and a second iris region from the second eye image, acquire second ratio information which is a ratio of an area of ​​the second pupil region to an area of ​​the second iris region; and, if a difference between the second ratio information stored in the memory and the second ratio information is less than a threshold value, complete iris authentication. According to one embodiment, at least one instruction may be configured to notify that iris authentication has failed and terminate the second screen so that the display module is disabled if a difference between the second ratio information stored in the memory and the second ratio information is greater than a threshold value. According to one embodiment, at least one instruction may be configured to: control a camera module to acquire a first eye image of a user while outputting a first screen, with a first iris template and a second iris template stored therein; distinguish a pupil region and an iris region from the first eye image; acquire first ratio information which is a ratio of an area of ​​the pupil region and an area of ​​the iris region; control a display module to switch from the first screen to a second screen to execute an iris authentication mode if a difference between the first ratio information stored in the memory and the first ratio information is less than a threshold value; control the camera module to acquire an eye image of the user while outputting the second screen; and perform iris authentication based on a comparison between the second iris template stored in the memory and an iris image extracted from the eye image. According to one embodiment, at least one instruction may: control the display module to output a third screen based on a third color while the iris enrollment mode is executed. According to one embodiment, the at least one instruction may: control the camera module to acquire a left eye image of the user, distinguish a left pupil region and a left iris region from the left eye image of the user, store third ratio information, which is a ratio of an area of ​​the left pupil region to an area of ​​the left iris region, in a memory, and control the display module to output a fourth screen based on a fourth color from the third screen. According to one embodiment, the at least one instruction may: control the camera to acquire a right eye image of the user, distinguish a right pupil region and a right iris region from the right eye image of the user, and store fourth ratio information, which is a ratio of an area of ​​the right pupil region to an area of ​​the right iris region, in a memory, while outputting the fourth screen. According to one embodiment, at least one instruction may control a camera module to acquire a left eye image of a user while a third screen is output, acquire the third ratio information from the left eye image, control the camera module to acquire a right eye image of the user while a fourth screen is output, acquire the fourth ratio information from the right eye image, and control the display module to switch from the fourth screen to an authentication screen to execute an iris authentication mode if a difference between the third ratio information stored in the memory and the third ratio information is less than a threshold value and a difference between the fourth ratio information stored in the memory and the fourth ratio information is less than the threshold value. A method of operating a wearable device according to one embodiment may include an operation of controlling a display module to output a first screen based on a first color, an operation of controlling a camera module to acquire an eye image of a user while outputting the first screen, an operation of distinguishing a pupil region and an iris region from the eye image and acquiring first ratio information that is a ratio of an area of ​​the pupil region and an area of ​​the iris region, and an operation of controlling the display module to switch from the first screen to an authentication screen to execute an iris authentication mode when a difference between the first ratio information stored in a memory and the first ratio information is less than a threshold value. A method of operating a wearable device according to one embodiment may further include an operation of terminating a first screen so that the display module becomes inactive when a difference between the first ratio information stored in the memory and the first ratio information is greater than a threshold value. According to one embodiment, a method of operating a wearable device may further include: an operation of controlling a display module to output a first screen based on a first color while an iris registration mode is executed. According to one embodiment, a method of operating a wearable device may further include: an operation of controlling a camera module to acquire a first eye image of a user, an operation of distinguishing a first pupil region and a first iris region from the first eye image, an operation of acquiring an area of ​​the first pupil region and an area of ​​the first iris region, an operation of storing first ratio information, which is a ratio of the area of ​​the first pupil region and the area of ​​the first iris region, in a memory, and an operation of controlling the display module to switch from the first screen to a second screen based on a second color. A method of operating a wearable device according to one embodiment may further include: controlling a camera module to acquire a second eye image of a user while outputting a second screen; distinguishing a second pupil region and a second iris region from the second eye image; acquiring an area of ​​the second pupil region and an area of ​​the second iris region; storing second ratio information, which is a ratio of the area of ​​the second pupil region and the area of ​​the second iris region, in a memory; and storing a first iris template corresponding to the first eye image and a second iris template corresponding to the second eye image together with the first ratio information and the second ratio information in the memory. In one embodiment, the first screen may output a first color that is black, and the second screen may output a second color that is gray. A method of operating a wearable device according to one embodiment may further include an operation of storing a first iris template in which feature points are extracted from a first iris region in a memory and an operation of storing a second iris template in which feature points are extracted from a second iris region in a memory. According to one embodiment, a method of operating a wearable device may further include: controlling a camera module to acquire a first eye image of a user while outputting a first screen in a state where a first iris template and the second iris template are stored; distinguishing a first pupil region and a first iris region from the first eye image and acquiring first ratio information which is a ratio of an area of ​​the first pupil region to an area of ​​the first iris region; controlling a display module to switch from a first screen to a second screen to execute an iris authentication mode if a difference between the first ratio information stored in a memory and the first ratio information is less than a threshold value; controlling a camera module to acquire a second eye image of the user while outputting a second screen; distinguishing a second pupil region and a second iris region from the second eye image and acquiring second ratio information which is a ratio of an area of ​​the second pupil region to an area of ​​the second iris region; and completing iris authentication if a difference between the second ratio information stored in the memory and the second ratio information is less than a threshold value. The operating method of a wearable device according to one embodiment may further include an operation of notifying that iris authentication has failed and terminating the second screen so that the display module is deactivated when a difference between the second ratio information stored in the memory and the second ratio information is greater than a threshold value. According to one embodiment, a method of operating a wearable device may further include: controlling a camera module to acquire a first eye image of a user while outputting a first screen in a state where a first iris template and the second iris template are stored; distinguishing a pupil region and an iris region from the first eye image and acquiring first ratio information which is a ratio of an area of ​​the pupil region and an area of ​​the iris region; controlling the display module to switch from the first screen to a second screen to execute an iris authentication mode if a difference between the first ratio information stored in a memory and the first ratio information is less than a threshold value; controlling the camera module to acquire an eye image of the user while outputting the second screen; and performing iris authentication based on a comparison between the second iris template stored in the memory and an iris image extracted from the eye image. According to one embodiment, a method of operating a wearable device may further include: while an iris registration mode is executed: controlling a display module to output a third screen based on a third color. According to one embodiment, a method of operating a wearable device may further include: while outputting the third screen: controlling a camera module to acquire a left eye image of a user, distinguishing a left pupil region and a left iris region from the left eye image of the user, storing third ratio information, which is a ratio of an area of ​​the left pupil region to an area of ​​the left iris region, in a memory, and controlling the display module to output a fourth screen based on a fourth color from the third screen. According to one embodiment, a method of operating a wearable device may further include: while outputting the fourth screen: controlling a camera module to acquire a right eye image of the user, distinguishing a right pupil region and a right iris region from the right eye image of the user, and storing fourth ratio information, which is a ratio of an area of ​​the right pupil region to an area of ​​the right iris region, in a memory. A method of operating a wearable device according to one embodiment may further include: controlling a camera module to acquire a left eye image of a user while a third screen is output, while third ratio information and fourth ratio information are stored in a memory; controlling the camera module to acquire a right eye image of the user while a fourth screen is output, while acquiring fourth ratio information from the right eye image; and controlling the display module to switch from the fourth screen to an authentication screen to execute an iris authentication mode when a difference between the third ratio information stored in the memory and the third ratio information is less than a threshold value and a difference between the fourth ratio information stored in the memory and the fourth ratio information is less than the threshold value.

Claims

1. In wearable devices, A camera module that takes pictures of the user's iris; display module; at least one processor; and A memory storing at least one instruction executable collectively or individually by at least one processor; The at least one instruction causes the wearable device to: Control the display module to output a first screen based on a first color, Controlling the camera module to acquire an image of the user's eye while outputting the first screen; Distinguish the pupil region and the iris region from the above eye image, and obtain first ratio information which is the ratio of the area of ​​the pupil region and the area of ​​the iris region, A wearable device that controls the display module to switch from the first screen to an authentication screen to execute an iris authentication mode when the difference between the first ratio information stored in the memory and the first ratio information is less than a threshold value.

2. In paragraph 1, At least one of the above instructions, A wearable device that terminates the first screen so that the display module becomes inactive when the difference between the first ratio information stored in the memory and the first ratio information is greater than a threshold value.

3. In paragraph 1, At least one of the above instructions, While iris enrollment mode is running: Control the display module to output a first screen based on a first color, While outputting the first screen above: Controlling the camera module to acquire the first eye image of the user; Distinguish the first pupil region and the first iris region from the first eye image, Obtain the area of ​​the first pupil area and the area of ​​the first iris area, Store first ratio information, which is the ratio of the area of ​​the first pupil area and the area of ​​the first iris area, in the memory, Control the display module to switch from the first screen to a second screen based on a second color, While outputting the above second screen: Controlling the camera module to acquire a second eye image of the user; Distinguish the second pupil area and the second iris area from the second eye image, Obtain the area of ​​the second pupil area and the area of ​​the second iris area, Store second ratio information, which is the ratio of the area of ​​the second pupil area and the area of ​​the second iris area, in the memory, A wearable device that stores a first iris template corresponding to the first eye image and a second iris template corresponding to the second eye image in the memory together with the first ratio information and the second ratio information.

4. In paragraph 3, A wearable device in which the first screen outputs a first color that is black, and the second screen outputs a second color that is gray.

5. In paragraph 3, At least one of the above instructions, The first iris template, from which feature points are extracted from the first iris region, is stored in the memory, A wearable device that stores the second iris template, in which feature points are extracted from the second iris region, in the memory.

6. In paragraph 3, At least one of the above instructions, In a state where the first iris template and the second iris template are stored: Controlling the camera module to acquire the user's first eye image while outputting the first screen; Distinguish a first pupil region and a first iris region from the first eye image, and obtain first ratio information which is a ratio of the area of ​​the first pupil region and the area of ​​the first iris region, If the difference between the first ratio information stored in the memory and the first ratio information is less than a threshold value, the display module is controlled to switch from the first screen to the second screen to execute the iris authentication mode, Controlling the camera module to acquire a second eye image of the user while outputting the second screen; Distinguishing a second pupil region and a second iris region from the second eye image, and obtaining second ratio information which is a ratio of the area of ​​the second pupil region and the area of ​​the second iris region, A wearable device that completes iris authentication when the difference between the second ratio information stored in the memory and the second ratio information is less than a threshold value.

7. In paragraph 6, At least one of the above instructions, A wearable device that notifies that the iris authentication has failed and terminates the second screen so that the display module is deactivated when the difference between the second ratio information stored in the memory and the second ratio information is greater than a threshold value.

8. In paragraph 5, At least one of the above instructions, In a state where the first iris template and the second iris template are stored: Controlling the camera module to acquire the user's first eye image while outputting the first screen; Distinguish the pupil region and the iris region from the first eye image, and obtain first ratio information which is the ratio of the area of ​​the pupil region and the area of ​​the iris region, If the difference between the first ratio information stored in the memory and the first ratio information is less than a threshold value, the display module is controlled to switch from the first screen to the second screen to execute the iris authentication mode, Controlling the camera module to acquire an image of the user's eye while outputting the second screen; A wearable device that performs iris authentication based on a comparison between the second iris template stored in the memory and the iris image extracted from the eye image.

9. In paragraph 3, At least one of the above instructions, While the above iris enrollment mode is running: Control the display module to output a third screen based on a third color, While outputting the third screen above: Controlling the camera module to acquire an image of the left eye of the user; Distinguish the left pupil area and the left iris area from the left eye image of the user, Store third ratio information, which is the ratio of the area of ​​the left pupil area and the area of ​​the left iris area, in the memory, Control the display module to switch from the third screen to the fourth screen based on the fourth color, While outputting the above 4th screen: Controlling the camera to acquire an image of the user's right eye, Distinguish the right pupil area and the right iris area from the image of the user's right eye, A wearable device that stores fourth ratio information, which is the ratio of the area of ​​the right pupil area and the area of ​​the right iris area, in the memory.

10. In paragraph 9, At least one of the above instructions, With the third ratio information and the fourth ratio information stored in the memory: Controlling the camera module to acquire an image of the user's left eye while the third screen is displayed; Obtain third ratio information from the above left eye image, Controlling the camera module to acquire an image of the user's right eye while the fourth screen is being output; Obtain the fourth ratio information from the above right eye image, A wearable device that controls the display module to switch from the fourth screen to an authentication screen to execute an iris authentication mode when the difference between the third ratio information stored in the memory and the third ratio information is less than a threshold value, and when the difference between the fourth ratio information stored in the memory and the fourth ratio information is less than a threshold value.

11. In the method of operating a wearable device, An action for controlling a display module to output a first screen based on a first color; An action of controlling a camera module to acquire an image of a user's eye while outputting the first screen; An operation of distinguishing a pupil region and an iris region from the above eye image and obtaining first ratio information which is a ratio of the area of ​​the pupil region and the area of ​​the iris region; and An operating method of a wearable device, comprising an operation of controlling the display module to switch from the first screen to an authentication screen to execute an iris authentication mode when a difference between first ratio information stored in a memory and the first ratio information is less than a threshold value.

12. In paragraph 11, An operating method of a wearable device further comprising: an operation of terminating the first screen so that the display module becomes inactive when a difference between the first ratio information stored in the memory and the first ratio information is greater than a threshold value; 13. In paragraph 11, While iris enrollment mode is running: An operation of controlling the display module to output a first screen based on a first color; While outputting the first screen above: An action of controlling the camera module to acquire a first eye image of the user; An operation of distinguishing a first pupil region and a first iris region from the first eye image; An operation of obtaining the area of ​​the first pupil area and the area of ​​the first iris area; An operation of storing first ratio information, which is a ratio of the area of ​​the first pupil area and the area of ​​the first iris area, in the memory; An action of controlling the display module to switch from the first screen to a second screen based on a second color; While outputting the above second screen: An action of controlling the camera module to acquire a second eye image of the user; An operation of distinguishing a second pupil region and a second iris region from the second eye image; An operation of obtaining the area of ​​the second pupil area and the area of ​​the second iris area; An operation of storing second ratio information, which is a ratio of the area of ​​the second pupil area and the area of ​​the second iris area, in the memory; and A method of operating a wearable device, further comprising: storing a first iris template corresponding to the first eye image and a second iris template corresponding to the second eye image in the memory together with the first ratio information and the second ratio information.

14. In paragraph 13, A method of operating a wearable device, further comprising: an operation in which the first screen outputs a first color that is black, and the second screen outputs a second color that is gray.

15. In paragraph 3, An operation of storing the first iris template, which has feature points extracted from the first iris region, in the memory; and A method of operating a wearable device, further comprising: an operation of storing the second iris template, from which feature points are extracted from the second iris region, in the memory.

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