Patent Publication Number: US-11380062-B2

Title: Electronic device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     Pursuant to 35 U.S.C. § 119(a), this application claims the benefit of earlier filing date and right of priority to Korean Patent Application No. 10-2019-0112957, filed on Sep. 11, 2019, the contents of which are hereby incorporated by reference herein in its entirety. 
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present disclosure relates to an electronic device and, more particularly, to an electronic device used for Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR). 
     Related Art 
     Virtual reality (VR) refers to a special environment or situation generated by man-made technology using computer and other devices, which is similar but not exactly equal to the real world. 
     Augmented reality (AR) refers to the technology that makes a virtual object or information interwoven with the real world, making the virtual object or information perceived as if exists in reality. 
     Mixed reality (MR) or hybrid reality refers to combining of the real world with virtual objects or information, generating a new environment or new information. In particular, mixed reality refers to the experience that physical and virtual objects interact with each other in real time. 
     The virtual environment or situation in a sense of mixed reality stimulates the five senses of a user, allows the user to have a spatio-temporal experience similar to the one perceived from the real world, and thereby allows the user to freely cross the boundary between reality and imagination. Also, the user may not only get immersed in such an environment but also interact with objects implemented in the environment by manipulating or giving a command to the objects through an actual device. 
     Recently, research into the gear specialized in the technical field above is being actively conducted. 
     An electronic device equipped with a display that provides augmented reality information and the like may be implemented as a head mounted type or a smart glasses type. 
     In particular, the smart glasses type electronic device occupies a smaller volume compared to the head mounted type by taking the form of eyeglasses for correcting vision, and has an advantage of being easily wearable or removable for use or storage. 
     However, since the smart glasses type electronic device has a heavier weight compared to conventional eyeglasses for correcting vision, nose supports with narrow areas, which are usually used, pressurizes the wearer, causing inconvenience. 
     In order to overcome this, it may be considered to have large nose supports. However, since the shape and size of wearing area of each wearer are all different, it may cause more discomfort if simply provided with larger areas. 
     SUMMARY OF THE INVENTION 
     The present disclosure provides an electronic device used for Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR). 
     The present disclosure is to improve an uncomfortable fit caused by the heavy weight of an electronic device that provides the real world and augmented reality information together as described above. 
     According to an aspect of the present disclosure to achieve the above or another object, an electronic device comprising an optical driving assembly configured to emit image light corresponding to augmented reality information, an optical element in which the emitted image light is incident to form an output area, a front frame coupled to the optical element, a side frame coupled to the front frame to form a body of an eyeglasses shape together with the front frame and a support member of a pad type coupled to the front frame to support at least one region of a wearer&#39;s nose, wherein the support member includes fixing areas fixed to two left points and two right points of the front frame, and flexible areas deformable to closely fit the wearer&#39;s nose between the two left fixing areas and the two right fixing areas, respectively is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein the fixing areas of the support member are formed at a pair of upper points that meet a horizontal axis passing through the nose root of the wearer and a pair of lower points provided at the bottom of the front frame is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein the support member is formed as an integrated member including a connecting portion connecting the fixing areas of the pair of upper point is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein the front frame includes a left eye frame and a right eye frame separated from each other, and the connecting portion connects the left eye frame and the right eye frame is provided. 
     Further, according to another aspect of the present disclosure, the electronic device further comprising a connecting frame connecting the left eye frame and the right eye frame is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein the connecting frame includes, a left side connecting frame connected to the left eye frame, a right side connecting frame connected to the right eye frame and a deformation member connecting the left side connecting frame and the right side connecting frame to be tilted below a predetermined angle range is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein the deformation member is a hinge member configured to pivot-engaging the left side connecting frame and the right side connecting frame is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein the predetermined angle is 5 degrees is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein the front frame is formed such that the left eye frame and the right eye frame are formed to have an open area corresponding to the wearer&#39;s nose area, and the left eye frame and the right eye frame have recessed cross sections to fix both sides of the upper point fixing area of the support member at each point facing the open area is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein the support member and the front frame are provided with a coupling protrusion and a hook groove for outer circumferential surface of the coupling protrusion to be inserted and fixed so that both sides of the lower point of the support member are fixed to the front frame is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein an upper point surface of the support member faces left and right, and a lower point surface of the support member faces upward is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein a length of the support member between the two fixing areas on one side is longer than a length of a boundary of the front frame is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein the flexible area includes a horizontal portion located at the bottom and a vertical portion provided in a vertical direction to form a curved surface connected at an inner end of the horizontal portion is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein the support member is a low melting elastomer is provided. 
     Further, according to another aspect of the present disclosure, the electronic device wherein the support member includes an olefin-based polymer is provided. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates one embodiment of an AI device. 
         FIG. 2  is a block diagram illustrating the structure of an eXtended Reality (XR) electronic device according to one embodiment of the present disclosure. 
         FIG. 3  is a perspective view of a VR electronic device according to one embodiment of the present disclosure. 
         FIG. 4  illustrates a situation in which the VR electronic device of  FIG. 3  is used. 
         FIG. 5  is a perspective view of an AR electronic device according to one embodiment of the present disclosure. 
         FIG. 6  is an exploded perspective view of a optical driving assembly according to one embodiment of the present disclosure. 
         FIGS. 7 to 13  illustrate various display methods applicable to a display according to one embodiment of the present disclosure. 
         FIG. 14  is a front view of a wearer wearing an electronic device associated with the present disclosure. 
         FIG. 15  is a front perspective view of an electronic device associated with the present disclosure. 
         FIG. 16  is a cross-sectional view taken along the A-A′ direction of  FIG. 15 . 
         FIG. 17  is a cross-sectional view taken along the B-B′ direction of  FIG. 15 . 
         FIG. 18  shows another example of an electronic device associated with the present disclosure. 
         FIG. 19  shows another example of an electronic device associated with the present disclosure. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     In what follows, embodiments disclosed in this document will be described in detail with reference to appended drawings, where the same or similar constituent elements are given the same reference number irrespective of their drawing symbols, and repeated descriptions thereof will be omitted. 
     In describing an embodiment disclosed in the present specification, if a constituting element is said to be “connected” or “attached” to other constituting element, it should be understood that the former may be connected or attached directly to the other constituting element, but there may be a case in which another constituting element is present between the two constituting elements. 
     Also, in describing an embodiment disclosed in the present document, if it is determined that a detailed description of a related art incorporated herein unnecessarily obscure the gist of the embodiment, the detailed description thereof will be omitted. Also, it should be understood that the appended drawings are intended only to help understand embodiments disclosed in the present document and do not limit the technical principles and scope of the present disclosure; rather, it should be understood that the appended drawings include all of the modifications, equivalents or substitutes described by the technical principles and belonging to the technical scope of the present disclosure. 
     [5G Scenario] 
     The three main requirement areas in the 5G system are (1) enhanced Mobile Broadband (eMBB) area, (2) massive Machine Type Communication (mMTC) area, and (3) Ultra-Reliable and Low Latency Communication (URLLC) area. 
     Some use case may require a plurality of areas for optimization, but other use case may focus only one Key Performance Indicator (KPI). The 5G system supports various use cases in a flexible and reliable manner. 
     eMBB far surpasses the basic mobile Internet access, supports various interactive works, and covers media and entertainment applications in the cloud computing or augmented reality environment. Data is one of core driving elements of the 5G system, which is so abundant that for the first time, the voice-only service may be disappeared. In the 5G, voice is expected to be handled simply by an application program using a data connection provided by the communication system. Primary causes of increased volume of traffic are increase of content size and increase of the number of applications requiring a high data transfer rate. Streaming service (audio and video), interactive video, and mobile Internet connection will be more heavily used as more and more devices are connected to the Internet. These application programs require always-on connectivity to push real-time information and notifications to the user. Cloud-based storage and applications are growing rapidly in the mobile communication platforms, which may be applied to both of business and entertainment uses. And the cloud-based storage is a special use case that drives growth of uplink data transfer rate. The 5G is also used for cloud-based remote works and requires a much shorter end-to-end latency to ensure excellent user experience when a tactile interface is used. Entertainment, for example, cloud-based game and video streaming, is another core element that strengthens the requirement for mobile broadband capability. Entertainment is essential for smartphones and tablets in any place including a high mobility environment such as a train, car, and plane. Another use case is augmented reality for entertainment and information search. Here, augmented reality requires very low latency and instantaneous data transfer. 
     Also, one of highly expected 5G use cases is the function that connects embedded sensors seamlessly in every possible area, namely the use case based on mMTC. Up to 2020, the number of potential IoT devices is expected to reach 20.4 billion. Industrial IoT is one of key areas where the 5G performs a primary role to maintain infrastructure for smart city, asset tracking, smart utility, agriculture and security. 
     URLLC includes new services which may transform industry through ultra-reliable/ultra-low latency links, such as remote control of major infrastructure and self-driving cars. The level of reliability and latency are essential for smart grid control, industry automation, robotics, and drone control and coordination. 
     Next, a plurality of use cases will be described in more detail. 
     The 5G may complement Fiber-To-The-Home (FTTH) and cable-based broadband (or DOCSIS) as a means to provide a stream estimated to occupy hundreds of megabits per second up to gigabits per second. This fast speed is required not only for virtual reality and augmented reality but also for transferring video with a resolution more than 4K (6K, 8K or more). VR and AR applications almost always include immersive sports games. Specific application programs may require a special network configuration. For example, in the case of VR game, to minimize latency, game service providers may have to integrate a core server with the edge network service of the network operator. 
     Automobiles are expected to be a new important driving force for the 5G system together with various use cases of mobile communication for vehicles. For example, entertainment for passengers requires high capacity and high mobile broadband at the same time. This is so because users continue to expect a high-quality connection irrespective of their location and moving speed. Another use case in the automotive field is an augmented reality dashboard. The augmented reality dashboard overlays information, which is a perception result of an object in the dark and contains distance to the object and object motion, on what is seen through the front window. In a future, a wireless module enables communication among vehicles, information exchange between a vehicle and supporting infrastructure, and information exchange among a vehicle and other connected devices (for example, devices carried by a pedestrian). A safety system guides alternative courses of driving so that a driver may drive his or her vehicle more safely and to reduce the risk of accident. The next step will be a remotely driven or self-driven vehicle. This step requires highly reliable and highly fast communication between different self-driving vehicles and between a self-driving vehicle and infrastructure. In the future, it is expected that a self-driving vehicle takes care of all of the driving activities while a human driver focuses on dealing with an abnormal driving situation that the self-driving vehicle is unable to recognize. Technical requirements of a self-driving vehicle demand ultra-low latency and ultra-fast reliability up to the level that traffic safety may not be reached by human drivers. 
     The smart city and smart home, which are regarded as essential to realize a smart society, will be embedded into a high-density wireless sensor network. Distributed networks comprising intelligent sensors may identify conditions for cost-efficient and energy-efficient conditions for maintaining cities and homes. A similar configuration may be applied for each home. Temperature sensors, window and heating controllers, anti-theft alarm devices, and home appliances will be all connected wirelessly. Many of these sensors typified with a low data transfer rate, low power, and low cost. However, for example, real-time HD video may require specific types of devices for the purpose of surveillance. 
     As consumption and distribution of energy including heat or gas is being highly distributed, automated control of a distributed sensor network is required. A smart grid collects information and interconnect sensors by using digital information and communication technologies so that the distributed sensor network operates according to the collected information. Since the information may include behaviors of energy suppliers and consumers, the smart grid may help improving distribution of fuels such as electricity in terms of efficiency, reliability, economics, production sustainability, and automation. The smart grid may be regarded as a different type of sensor network with a low latency. 
     The health-care sector has many application programs that may benefit from mobile communication. A communication system may support telemedicine providing a clinical care from a distance. Telemedicine may help reduce barriers to distance and improve access to medical services that are not readily available in remote rural areas. It may also be used to save lives in critical medical and emergency situations. A wireless sensor network based on mobile communication may provide remote monitoring and sensors for parameters such as the heart rate and blood pressure. 
     Wireless and mobile communication are becoming increasingly important for industrial applications. Cable wiring requires high installation and maintenance costs. Therefore, replacement of cables with reconfigurable wireless links is an attractive opportunity for many industrial applications. However, to exploit the opportunity, the wireless connection is required to function with a latency similar to that in the cable connection, to be reliable and of large capacity, and to be managed in a simple manner. Low latency and very low error probability are new requirements that lead to the introduction of the 5G system. 
     Logistics and freight tracking are important use cases of mobile communication, which require tracking of an inventory and packages from any place by using location-based information system. The use of logistics and freight tracking typically requires a low data rate but requires large-scale and reliable location information. 
     The present disclosure to be described below may be implemented by combining or modifying the respective embodiments to satisfy the aforementioned requirements of the 5G system. 
       FIG. 1  illustrates one embodiment of an AI device. 
     Referring to  FIG. 1 , in the AI system, at least one or more of an AI server  16 , robot  11 , self-driving vehicle  12 , XR device  13 , smartphone  14 , or home appliance  15  are connected to a cloud network  10 . Here, the robot  11 , self-driving vehicle  12 , XR device  13 , smartphone  14 , or home appliance  15  to which the AI technology has been applied may be referred to as an AI device ( 11  to  15 ). 
     The cloud network  10  may comprise part of the cloud computing infrastructure or refer to a network existing in the cloud computing infrastructure. Here, the cloud network  10  may be constructed by using the 3G network, 4G or Long Term Evolution (LTE) network, or 5G network. 
     In other words, individual devices ( 11  to  16 ) constituting the AI system may be connected to each other through the cloud network  10 . In particular, each individual device ( 11  to  16 ) may communicate with each other through the eNB but may communicate directly to each other without relying on the eNB. 
     The AI server  16  may include a server performing AI processing and a server performing computations on big data. 
     The AI server  16  may be connected to at least one or more of the robot  11 , self-driving vehicle  12 , XR device  13 , smartphone  14 , or home appliance  15 , which are AI devices constituting the AI system, through the cloud network  10  and may help at least part of AI processing conducted in the connected AI devices ( 11  to  15 ). 
     At this time, the AI server  16  may teach the artificial neural network according to a machine learning algorithm on behalf of the AI device ( 11  to  15 ), directly store the learning model, or transmit the learning model to the AI device ( 11  to  15 ). 
     At this time, the AI server  16  may receive input data from the AI device ( 11  to  15 ), infer a result value from the received input data by using the learning model, generate a response or control command based on the inferred result value, and transmit the generated response or control command to the AI device ( 11  to  15 ). 
     Similarly, the AI device ( 11  to  15 ) may infer a result value from the input data by employing the learning model directly and generate a response or control command based on the inferred result value. 
     &lt;AI+Robot&gt; 
     By employing the AI technology, the robot  11  may be implemented as a guide robot, transport robot, cleaning robot, wearable robot, entertainment robot, pet robot, or unmanned flying robot. 
     The robot  11  may include a robot control module for controlling its motion, where the robot control module may correspond to a software module or a chip which implements the software module in the form of a hardware device. 
     The robot  11  may obtain status information of the robot  11 , detect (recognize) the surroundings and objects, generate map data, determine a travel path and navigation plan, determine a response to user interaction, or determine motion by using sensor information obtained from various types of sensors. 
     Here, the robot  11  may use sensor information obtained from at least one or more sensors among lidar, radar, and camera to determine a travel path and navigation plan. 
     The robot  11  may perform the operations above by using a learning model built on at least one or more artificial neural networks. For example, the robot  11  may recognize the surroundings and objects by using the learning model and determine its motion by using the recognized surroundings or object information. Here, the learning model may be the one trained by the robot  11  itself or trained by an external device such as the AI server  16 . 
     At this time, the robot  11  may perform the operation by generating a result by employing the learning model directly but also perform the operation by transmitting sensor information to an external device such as the AI server  16  and receiving a result generated accordingly. 
     The robot  11  may determine a travel path and navigation plan by using at least one or more of object information detected from the map data and sensor information or object information obtained from an external device and navigate according to the determined travel path and navigation plan by controlling its locomotion platform. 
     Map data may include object identification information about various objects disposed in the space in which the robot  11  navigates. For example, the map data may include object identification information about static objects such as wall and doors and movable objects such as a flowerpot and a desk. And the object identification information may include the name, type, distance, location, and so on. 
     Also, the robot  11  may perform the operation or navigate the space by controlling its locomotion platform based on the control/interaction of the user. At this time, the robot  11  may obtain intention information of the interaction due to the user&#39;s motion or voice command and perform an operation by determining a response based on the obtained intention information. 
     &lt;AI+Autonomous Navigation&gt; 
     By employing the AI technology, the self-driving vehicle  12  may be implemented as a mobile robot, unmanned ground vehicle, or unmanned aerial vehicle. 
     The self-driving vehicle  12  may include an autonomous navigation module for controlling its autonomous navigation function, where the autonomous navigation control module may correspond to a software module or a chip which implements the software module in the form of a hardware device. The autonomous navigation control module may be installed inside the self-driving vehicle  12  as a constituting element thereof or may be installed outside the self-driving vehicle  12  as a separate hardware component. 
     The self-driving vehicle  12  may obtain status information of the self-driving vehicle  12 , detect (recognize) the surroundings and objects, generate map data, determine a travel path and navigation plan, or determine motion by using sensor information obtained from various types of sensors. 
     Like the robot  11 , the self-driving vehicle  12  may use sensor information obtained from at least one or more sensors among lidar, radar, and camera to determine a travel path and navigation plan. 
     In particular, the self-driving vehicle  12  may recognize an occluded area or an area extending over a predetermined distance or objects located across the area by collecting sensor information from external devices or receive recognized information directly from the external devices. 
     The self-driving vehicle  12  may perform the operations above by using a learning model built on at least one or more artificial neural networks. For example, the self-driving vehicle  12  may recognize the surroundings and objects by using the learning model and determine its navigation route by using the recognized surroundings or object information. Here, the learning model may be the one trained by the self-driving vehicle  12  itself or trained by an external device such as the AI server  16 . 
     At this time, the self-driving vehicle  12  may perform the operation by generating a result by employing the learning model directly but also perform the operation by transmitting sensor information to an external device such as the AI server  16  and receiving a result generated accordingly. 
     The self-driving vehicle  12  may determine a travel path and navigation plan by using at least one or more of object information detected from the map data and sensor information or object information obtained from an external device and navigate according to the determined travel path and navigation plan by controlling its driving platform. 
     Map data may include object identification information about various objects disposed in the space (for example, road) in which the self-driving vehicle  12  navigates. For example, the map data may include object identification information about static objects such as streetlights, rocks and buildings and movable objects such as vehicles and pedestrians. And the object identification information may include the name, type, distance, location, and so on. 
     Also, the self-driving vehicle  12  may perform the operation or navigate the space by controlling its driving platform based on the control/interaction of the user. At this time, the self-driving vehicle  12  may obtain intention information of the interaction due to the user&#39;s motion or voice command and perform an operation by determining a response based on the obtained intention information. 
     &lt;AI+XR&gt; 
     By employing the AI technology, the XR device  13  may be implemented as a Head-Mounted Display (HMD), Head-Up Display (HUD) installed at the vehicle, TV, mobile phone, smartphone, computer, wearable device, home appliance, digital signage, vehicle, robot with a fixed platform, or mobile robot. 
     The XR device  13  may obtain information about the surroundings or physical objects by generating position and attribute data about 3D points by analyzing 3D point cloud or image data acquired from various sensors or external devices and output objects in the form of XR objects by rendering the objects for display. 
     The XR device  13  may perform the operations above by using a learning model built on at least one or more artificial neural networks. For example, the XR device  13  may recognize physical objects from 3D point cloud or image data by using the learning model and provide information corresponding to the recognized physical objects. Here, the learning model may be the one trained by the XR device  13  itself or trained by an external device such as the AI server  16 . 
     At this time, the XR device  13  may perform the operation by generating a result by employing the learning model directly but also perform the operation by transmitting sensor information to an external device such as the AI server  16  and receiving a result generated accordingly. 
     &lt;AI+Robot+Autonomous Navigation&gt; 
     By employing the AI and autonomous navigation technologies, the robot  11  may be implemented as a guide robot, transport robot, cleaning robot, wearable robot, entertainment robot, pet robot, or unmanned flying robot. 
     The robot  11  employing the AI and autonomous navigation technologies may correspond to a robot itself having an autonomous navigation function or a robot  11  interacting with the self-driving vehicle  12 . 
     The robot  11  having the autonomous navigation function may correspond collectively to the devices which may move autonomously along a given path without control of the user or which may move by determining its path autonomously. 
     The robot  11  and the self-driving vehicle  12  having the autonomous navigation function may use a common sensing method to determine one or more of the travel path or navigation plan. For example, the robot  11  and the self-driving vehicle  12  having the autonomous navigation function may determine one or more of the travel path or navigation plan by using the information sensed through lidar, radar, and camera. 
     The robot  11  interacting with the self-driving vehicle  12 , which exists separately from the self-driving vehicle  12 , may be associated with the autonomous navigation function inside or outside the self-driving vehicle  12  or perform an operation associated with the user riding the self-driving vehicle  12 . 
     At this time, the robot  11  interacting with the self-driving vehicle  12  may obtain sensor information in place of the self-driving vehicle  12  and provide the sensed information to the self-driving vehicle  12 ; or may control or assist the autonomous navigation function of the self-driving vehicle  12  by obtaining sensor information, generating information of the surroundings or object information, and providing the generated information to the self-driving vehicle  12 . 
     Also, the robot  11  interacting with the self-driving vehicle  12  may control the function of the self-driving vehicle  12  by monitoring the user riding the self-driving vehicle  12  or through interaction with the user. For example, if it is determined that the driver is drowsy, the robot  11  may activate the autonomous navigation function of the self-driving vehicle  12  or assist the control of the driving platform of the self-driving vehicle  12 . Here, the function of the self-driving vehicle  12  controlled by the robot  12  may include not only the autonomous navigation function but also the navigation system installed inside the self-driving vehicle  12  or the function provided by the audio system of the self-driving vehicle  12 . 
     Also, the robot  11  interacting with the self-driving vehicle  12  may provide information to the self-driving vehicle  12  or assist functions of the self-driving vehicle  12  from the outside of the self-driving vehicle  12 . For example, the robot  11  may provide traffic information including traffic sign information to the self-driving vehicle  12  like a smart traffic light or may automatically connect an electric charger to the charging port by interacting with the self-driving vehicle  12  like an automatic electric charger of the electric vehicle. 
     &lt;AI+Robot+XR&gt; 
     By employing the AI technology, the robot  11  may be implemented as a guide robot, transport robot, cleaning robot, wearable robot, entertainment robot, pet robot, or unmanned flying robot. 
     The robot  11  employing the XR technology may correspond to a robot which acts as a control/interaction target in the XR image. In this case, the robot  11  may be distinguished from the XR device  13 , both of which may operate in conjunction with each other. 
     If the robot  11 , which acts as a control/interaction target in the XR image, obtains sensor information from the sensors including a camera, the robot  11  or XR device  13  may generate an XR image based on the sensor information, and the XR device  13  may output the generated XR image. And the robot  11  may operate based on the control signal received through the XR device  13  or based on the interaction with the user. 
     For example, the user may check the XR image corresponding to the viewpoint of the robot  11  associated remotely through an external device such as the XR device  13 , modify the navigation path of the robot  11  through interaction, control the operation or navigation of the robot  11 , or check the information of nearby objects. 
     &lt;AI+Autonomous Navigation+XR&gt; 
     By employing the AI and XR technologies, the self-driving vehicle  12  may be implemented as a mobile robot, unmanned ground vehicle, or unmanned aerial vehicle. 
     The self-driving vehicle  12  employing the XR technology may correspond to a self-driving vehicle having a means for providing XR images or a self-driving vehicle which acts as a control/interaction target in the XR image. In particular, the self-driving vehicle  12  which acts as a control/interaction target in the XR image may be distinguished from the XR device  13 , both of which may operate in conjunction with each other. 
     The self-driving vehicle  12  having a means for providing XR images may obtain sensor information from sensors including a camera and output XR images generated based on the sensor information obtained. For example, by displaying an XR image through HUD, the self-driving vehicle  12  may provide XR images corresponding to physical objects or image objects to the passenger. 
     At this time, if an XR object is output on the HUD, at least part of the XR object may be output so as to be overlapped with the physical object at which the passenger gazes. On the other hand, if an XR object is output on a display installed inside the self-driving vehicle  12 , at least part of the XR object may be output so as to be overlapped with an image object. For example, the self-driving vehicle  12  may output XR objects corresponding to the objects such as roads, other vehicles, traffic lights, traffic signs, bicycles, pedestrians, and buildings. 
     If the self-driving vehicle  12 , which acts as a control/interaction target in the XR image, obtains sensor information from the sensors including a camera, the self-driving vehicle  12  or XR device  13  may generate an XR image based on the sensor information, and the XR device  13  may output the generated XR image. And the self-driving vehicle  12  may operate based on the control signal received through an external device such as the XR device  13  or based on the interaction with the user. 
     [Extended Reality Technology] 
     eXtended Reality (XR) refers to all of Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR). The VR technology provides objects or backgrounds of the real world only in the form of CG images, AR technology provides virtual CG images overlaid on the physical object images, and MR technology employs computer graphics technology to mix and merge virtual objects with the real world. 
     MR technology is similar to AR technology in a sense that physical objects are displayed together with virtual objects. However, while virtual objects supplement physical objects in the AR, virtual and physical objects co-exist as equivalents in the MR. 
     The XR technology may be applied to Head-Mounted Display (HMD), Head-Up Display (HUD), mobile phone, tablet PC, laptop computer, desktop computer, TV, digital signage, and so on, where a device employing the XR technology may be called an XR device. 
     In what follows, an electronic device providing XR according to an embodiment of the present disclosure will be described. 
       FIG. 2  is a block diagram illustrating the structure of an XR electronic device  20  according to one embodiment of the present disclosure. 
     Referring to  FIG. 2 , the XR electronic device  20  may include a wireless communication unit  21 , input unit  22 , sensing unit  23 , output unit  24 , interface unit  25 , memory  26 , controller  27 , and power supply unit  28 . The constituting elements shown in  FIG. 2  are not essential for implementing the electronic device  20 , and therefore, the electronic device  20  described in this document may have more or fewer constituting elements than those listed above. 
     More specifically, among the constituting elements above, the wireless communication unit  21  may include one or more modules which enable wireless communication between the electronic device  20  and a wireless communication system, between the electronic device  20  and other electronic device, or between the electronic device  20  and an external server. Also, the wireless communication unit  21  may include one or more modules that connect the electronic device  20  to one or more networks. 
     The wireless communication unit  21  may include at least one of a broadcast receiving module, mobile communication module, wireless Internet module, short-range communication module, and location information module. 
     The input unit  22  may include a camera or image input unit for receiving an image signal, microphone or audio input unit for receiving an audio signal, and user input unit (for example, touch key) for receiving information from the user, and push key (for example, mechanical key). Voice data or image data collected by the input unit  22  may be analyzed and processed as a control command of the user. 
     The sensing unit  23  may include one or more sensors for sensing at least one of the surroundings of the electronic device  20  and user information. 
     For example, the sensing unit  23  may include at least one of a proximity sensor, illumination sensor, touch sensor, acceleration sensor, magnetic sensor, G-sensor, gyroscope sensor, motion sensor, RGB sensor, infrared (IR) sensor, finger scan sensor, ultrasonic sensor, optical sensor (for example, image capture means), microphone, battery gauge, environment sensor (for example, barometer, hygrometer, radiation detection sensor, heat detection sensor, and gas detection sensor), and chemical sensor (for example, electronic nose, health-care sensor, and biometric sensor). Meanwhile, the electronic device  20  disclosed in the present specification may utilize information collected from at least two or more sensors listed above. 
     The output unit  24  is intended to generate an output related to a visual, aural, or tactile stimulus and may include at least one of a display, sound output unit, haptic module, and optical output unit. The display may implement a touchscreen by forming a layered structure or being integrated with touch sensors. The touchscreen may not only function as a user input means for providing an input interface between the AR electronic device  20  and the user but also provide an output interface between the AR electronic device  20  and the user. 
     The interface unit  25  serves as a path to various types of external devices connected to the electronic device  20 . Through the interface unit  25 , the electronic device  20  may receive VR or AR content from an external device and perform interaction by exchanging various input signals, sensing signals, and data. 
     For example, the interface unit  25  may include at least one of a wired/wireless headset port, external charging port, wired/wireless data port, memory card port, port for connecting to a device equipped with an identification module, audio Input/Output (I/O) port, video I/O port, and earphone port. 
     Also, the memory  26  stores data supporting various functions of the electronic device  20 . The memory  26  may store a plurality of application programs (or applications) executed in the electronic device  20 ; and data and commands for operation of the electronic device  20 . Also, at least part of the application programs may be pre-installed at the electronic device  20  from the time of factory shipment for basic functions (for example, incoming and outgoing call function and message reception and transmission function) of the electronic device  20 . 
     The controller  27  usually controls the overall operation of the electronic device  20  in addition to the operation related to the application program. The controller  27  may process signals, data, and information input or output through the constituting elements described above. 
     Also, the controller  27  may provide relevant information or process a function for the user by executing an application program stored in the memory  26  and controlling at least part of the constituting elements. Furthermore, the controller  27  may combine and operate at least two or more constituting elements among those constituting elements included in the electronic device  20  to operate the application program. 
     Also, the controller  27  may detect the motion of the electronic device  20  or user by using a gyroscope sensor, g-sensor, or motion sensor included in the sensing unit  23 . Also, the controller  27  may detect an object approaching the vicinity of the electronic device  20  or user by using a proximity sensor, illumination sensor, magnetic sensor, infrared sensor, ultrasonic sensor, or light sensor included in the sensing unit  23 . Besides, the controller  27  may detect the motion of the user through sensors installed at the controller operating in conjunction with the electronic device  20 . 
     Also, the controller  27  may perform the operation (or function) of the electronic device  20  by using an application program stored in the memory  26 . 
     The power supply unit  28  receives external or internal power under the control of the controller  27  and supplies the power to each and every constituting element included in the electronic device  20 . The power supply unit  28  includes battery, which may be provided in a built-in or replaceable form. 
     At least part of the constituting elements described above may operate in conjunction with each other to implement the operation, control, or control method of the electronic device according to various embodiments described below. Also, the operation, control, or control method of the electronic device may be implemented on the electronic device by executing at least one application program stored in the memory  26 . 
     In what follows, the electronic device according to one embodiment of the present disclosure will be described with reference to an example where the electronic device is applied to a Head Mounted Display (HMD). However, embodiments of the electronic device according to the present disclosure may include a mobile phone, smartphone, laptop computer, digital broadcast terminal, Personal Digital Assistant (PDA), Portable Multimedia Player (PMP), navigation terminal, slate PC, tablet PC, ultrabook, and wearable device. Wearable devices may include smart watch and contact lens in addition to the HMD. 
       FIG. 3  is a perspective view of a VR electronic device according to one embodiment of the present disclosure, and  FIG. 4  illustrates a situation in which the VR electronic device of  FIG. 3  is used. 
     Referring to the figures, a VR electronic device may include a box-type electronic device  30  mounted on the head of the user and a controller  40  ( 40   a ,  40   b ) that the user may grip and manipulate. 
     The electronic device  30  includes a head unit  31  worn and supported on the head and a display  32  being combined with the head unit  31  and displaying a virtual image or video in front of the user&#39;s eyes. Although the figure shows that the head unit  31  and display  32  are made as separate units and combined together, the display  32  may also be formed being integrated into the head unit  31 . 
     The head unit  31  may assume a structure of enclosing the head of the user so as to disperse the weight of the display  32 . And to accommodate different head sizes of users, the head unit  31  may provide a band of variable length. 
     The display  32  includes a cover unit  32   a  combined with the head unit  31  and a display  32   b  containing a display panel. 
     The cover unit  32   a  is also called a goggle frame and may have the shape of a tub as a whole. The cover unit  32   a  has a space formed therein, and an opening is formed at the front surface of the cover unit, the position of which corresponds to the eyeballs of the user. 
     The display  32   b  is installed on the front surface frame of the cover unit  32   a  and disposed at the position corresponding to the eyes of the user to display screen information (image or video). The screen information output on the display  32   b  includes not only VR content but also external images collected through an image capture means such as a camera. 
     And VR content displayed on the display  32   b  may be the content stored in the electronic device  30  itself or the content stored in an external device  60 . For example, when the screen information is an image of the virtual world stored in the electronic device  30 , the electronic device  30  may perform image processing and rendering to process the image of the virtual world and display image information generated from the image processing and rendering through the display  32   b . On the other hand, in the case of a VR image stored in the external device  60 , the external device  60  performs image processing and rendering and transmits image information generated from the image processing and rendering to the electronic device  30 . Then the electronic device  30  may output 3D image information received from the external device  60  through the display  32   b.    
     The display  32   b  may include a display panel installed at the front of the opening of the cover unit  32   a , where the display panel may be an LCD or OLED panel. Similarly, the display  32   b  may be a display of a smartphone. In other words, the display  32   b  may have a specific structure in which a smartphone may be attached to or detached from the front of the cover unit  32   a.    
     And an image capture means and various types of sensors may be installed at the front of the display  32 . 
     The image capture means (for example, camera) is formed to capture (receive or input) the image of the front and may obtain a real world as seen by the user as an image. One image capture means may be installed at the center of the display  32   b , or two or more of them may be installed at symmetric positions. When a plurality of image capture means are installed, a stereoscopic image may be obtained. An image combining an external image obtained from an image capture means with a virtual image may be displayed through the display  32   b.    
     Various types of sensors may include a gyroscope sensor, motion sensor, or IR sensor. Various types of sensors will be described in more detail later. 
     At the rear of the display  32 , a facial pad  33  may be installed. The facial pad  33  is made of cushioned material and is fit around the eyes of the user, providing comfortable fit to the face of the user. And the facial pad  33  is made of a flexible material with a shape corresponding to the front contour of the human face and may be fit to the facial shape of a different user, thereby blocking external light from entering the eyes. 
     In addition to the above, the electronic device  30  may be equipped with a user input unit operated to receive a control command, sound output unit, and controller. Descriptions of the aforementioned units are the same as give previously and will be omitted. 
     Also, a VR electronic device may be equipped with a controller  40  ( 40   a ,  40   b ) for controlling the operation related to VR images displayed through the box-type electronic device  30  as a peripheral device. 
     The controller  40  is provided in a way that the user may easily grip the controller  40  by using his or her both hands, and the outer surface of the controller  40  may have a touchpad (or trackpad) or buttons for receiving the user input. 
     The controller  40  may be used to control the screen output on the display  32   b  in conjunction with the electronic device  30 . The controller  40  may include a grip unit that the user grips and a head unit extended from the grip unit and equipped with various sensors and a microprocessor. The grip unit may be shaped as a long vertical bar so that the user may easily grip the grip unit, and the head unit may be formed in a ring shape. 
     And the controller  40  may include an IR sensor, motion tracking sensor, microprocessor, and input unit. For example, IR sensor receives light emitted from a position tracking device  50  to be described later and tracks motion of the user. The motion tracking sensor may be formed as a single sensor suite integrating a 3-axis acceleration sensor, 3-axis gyroscope, and digital motion processor. 
     And the grip unit of the controller  40  may provide a user input unit. For example, the user input unit may include keys disposed inside the grip unit, touchpad (trackpad) equipped outside the grip unit, and trigger button. 
     Meanwhile, the controller  40  may perform a feedback operation corresponding to a signal received from the controller  27  of the electronic device  30 . For example, the controller  40  may deliver a feedback signal to the user in the form of vibration, sound, or light. 
     Also, by operating the controller  40 , the user may access an external environment image seen through the camera installed in the electronic device  30 . In other words, even in the middle of experiencing the virtual world, the user may immediately check the surrounding environment by operating the controller  40  without taking off the electronic device  30 . 
     Also, the VR electronic device may further include a position tracking device  50 . The position tracking device  50  detects the position of the electronic device  30  or controller  40  by applying a position tracking technique, called lighthouse system, and helps tracking the 360-degree motion of the user. 
     The position tacking system may be implemented by installing one or more position tracking device  50  ( 50   a ,  50   b ) in a closed, specific space. A plurality of position tracking devices  50  may be installed at such positions that maximize the span of location-aware space, for example, at positions facing each other in the diagonal direction. 
     The electronic device  30  or controller  40  may receive light emitted from LED or laser emitter included in the plurality of position tracking devices  50  and determine the accurate position of the user in a closed, specific space based on a correlation between the time and position at which the corresponding light is received. To this purpose, each of the position tracking devices  50  may include an IR lamp and 2-axis motor, through which a signal is exchanged with the electronic device  30  or controller  40 . 
     Also, the electronic device  30  may perform wired/wireless communication with an external device  60  (for example, PC, smartphone, or tablet PC). The electronic device  30  may receive images of the virtual world stored in the connected external device  60  and display the received image to the user. 
     Meanwhile, since the controller  40  and position tracking device  50  described above are not essential elements, they may be omitted in the embodiments of the present disclosure. For example, an input device installed in the electronic device  30  may replace the controller  40 , and position information may be determined by itself from various sensors installed in the electronic device  30 . 
       FIG. 5  is a perspective view of an AR electronic device according to one embodiment of the present disclosure. 
     As shown in  FIG. 5 , the electronic device according to one embodiment of the present disclosure may include a frame  100 , controller  200 , and display  300 . 
     The electronic device may be provided in the form of smart glasses. The glass-type electronic device may be shaped to be worn on the head of the user, for which the frame (case or housing)  100  may be used. The frame  100  may be made of a flexible material so that the user may wear the glass-type electronic device comfortably. 
     The frame  100  is supported on the head and provides a space in which various components are installed. As shown in the figure, electronic components such as the controller  200 , user input unit  130 , or sound output unit  140  may be installed in the frame  100 . Also, lens that covers at least one of the left and right eyes may be installed in the frame  100  in a detachable manner. 
     As shown in the figure, the frame  100  may have a shape of glasses worn on the face of the user; however, the present disclosure is not limited to the specific shape and may have a shape such as goggles worn in close contact with the user&#39;s face. 
     The frame  100  may include a front frame  110  having at least one opening and one pair of side frames  120  parallel to each other and being extended in a first direction (y), which are intersected by the front frame  110 . 
     The controller  200  is configured to control various electronic components installed in the electronic device. 
     The controller  200  may generate an image shown to the user or video comprising successive images. The controller  200  may include an image source panel that generates an image and a plurality of lenses that diffuse and converge light generated from the image source panel. 
     The controller  200  may be fixed to either of the two side frames  120 . For example, the controller  200  may be fixed in the inner or outer surface of one side frame  120  or embedded inside one of side frames  120 . Or the controller  200  may be fixed to the front frame  110  or provided separately from the electronic device. 
     The display  300  may be implemented in the form of a Head Mounted Display (HMD). HMD refers to a particular type of display device worn on the head and showing an image directly in front of eyes of the user. The display  300  may be disposed to correspond to at least one of left and right eyes so that images may be shown directly in front of the eye(s) of the user when the user wears the electronic device. The present figure illustrates a case where the display  300  is disposed at the position corresponding to the right eye of the user so that images may be shown before the right eye of the user. 
     The display  300  may be used so that an image generated by the controller  200  is shown to the user while the user visually recognizes the external environment. For example, the display  300  may project an image on the display area by using a prism. 
     And the display  300  may be formed to be transparent so that a projected image and a normal view (the visible part of the world as seen through the eyes of the user) in the front are shown at the same time. For example, the display  300  may be translucent and made of optical elements including glass. 
     And the display  300  may be fixed by being inserted into the opening included in the front frame  110  or may be fixed on the front surface  110  by being positioned on the rear surface of the opening (namely between the opening and the user&#39;s eye). Although the figure illustrates one example where the display  300  is fixed on the front surface  110  by being positioned on the rear surface of the rear surface, the display  300  may be disposed and fixed at various positions of the frame  100 . 
     As shown in  FIG. 5 , the electronic device may operate so that if the controller  200  projects light about an image onto one side of the display  300 , the light is emitted to the other side of the display, and the image generated by the controller  200  is shown to the user. 
     Accordingly, the user may see the image generated by the controller  200  while seeing the external environment simultaneously through the opening of the frame  100 . In other words, the image output through the display  300  may be seen by being overlapped with a normal view. By using the display characteristic described above, the electronic device may provide an AR experience which shows a virtual image overlapped with a real image or background as a single, interwoven image. 
       FIG. 6  is an exploded perspective view of a controller according to one embodiment of the present disclosure. 
     Referring to the figure, the controller  200  may include a first cover  207  and second cover  225  for protecting internal constituting elements and forming the external appearance of the controller  200 , where, inside the first  207  and second  225  covers, included are a driving unit  201 , image source panel  203 , Polarization Beam Splitter Filter (PBSF)  211 , mirror  209 , a plurality of lenses  213 ,  215 ,  217 ,  221 , Fly Eye Lens (FEL)  219 , Dichroic filter  227 , and Freeform prism Projection Lens (FPL)  223 . 
     The first  207  and second  225  covers provide a space in which the driving unit  201 , image source panel  203 , PBSF  211 , mirror  209 , a plurality of lenses  213 ,  215 ,  217 ,  221 , FEL  219 , and FPL may be installed, and the internal constituting elements are packaged and fixed to either of the side frames  120 . 
     The driving unit  201  may supply a driving signal that controls a video or an image displayed on the image source panel  203  and may be linked to a separate modular driving chip installed inside or outside the controller  200 . The driving unit  201  may be installed in the form of Flexible Printed Circuits Board (FPCB), which may be equipped with heatsink that dissipates heat generated during operation to the outside. 
     The image source panel  203  may generate an image according to a driving signal provided by the driving unit  201  and emit light according to the generated image. To this purpose, the image source panel  203  may use the Liquid Crystal Display (LCD) or Organic Light Emitting Diode (OLED) panel. 
     The PBSF  211  may separate light due to the image generated from the image source panel  203  or block or pass part of the light according to a rotation angle. Therefore, for example, if the image light emitted from the image source panel  203  is composed of P wave, which is horizontal light, and S wave, which is vertical light, the PBSF  211  may separate the P and S waves into different light paths or pass the image light of one polarization or block the image light of the other polarization. The PBSF  211  may be provided as a cube type or plate type in one embodiment. 
     The cube-type PBSF  211  may filter the image light composed of P and S waves and separate them into different light paths while the plate-type PBSF  211  may pass the image light of one of the P and S waves but block the image light of the other polarization. 
     The mirror  209  reflects the image light separated from polarization by the PBSF  211  to collect the polarized image light again and let the collected image light incident on a plurality of lenses  213 ,  215 ,  217 ,  221 . 
     The plurality of lenses  213 ,  215 ,  217 ,  221  may include convex and concave lenses and for example, may include I-type lenses and C-type lenses. The plurality of lenses  213 ,  215 ,  217 ,  221  repeat diffusion and convergence of image light incident on the lenses, thereby improving straightness of the image light rays. 
     The FEL  219  may receive the image light which has passed the plurality of lenses  213 ,  215 ,  217 ,  221  and emit the image light so as to improve illuminance uniformity and extend the area exhibiting uniform illuminance due to the image light. 
     The dichroic filter  227  may include a plurality of films or lenses and pass light of a specific range of wavelengths from the image light incoming from the FEL  219  but reflect light not belonging to the specific range of wavelengths, thereby adjusting saturation of color of the image light. The image light which has passed the dichroic filter  227  may pass through the FPL  223  and be emitted to the display  300 . 
     The display  300  may receive the image light emitted from the controller  200  and emit the incident image light to the direction in which the user&#39;s eyes are located. 
     Meanwhile, in addition to the constituting elements described above, the electronic device may include one or more image capture means (not shown). The image capture means, being disposed close to at least one of left and right eyes, may capture the image of the front area. Or the image capture means may be disposed so as to capture the image of the side/rear area. 
     Since the image capture means is disposed close to the eye, the image capture means may obtain the image of a real world seen by the user. The image capture means may be installed at the frame  100  or arranged in plural numbers to obtain stereoscopic images. 
     The electronic device may provide a user input unit  130  manipulated to receive control commands. The user input unit  130  may adopt various methods including a tactile manner in which the user operates the user input unit by sensing a tactile stimulus from a touch or push motion, gesture manner in which the user input unit recognizes the hand motion of the user without a direct touch thereon, or a manner in which the user input unit recognizes a voice command. The present figure illustrates a case where the user input unit  130  is installed at the frame  100 . 
     Also, the electronic device may be equipped with a microphone which receives a sound and converts the received sound to electrical voice data and a sound output unit  140  that outputs a sound. The sound output unit  140  may be configured to transfer a sound through an ordinary sound output scheme or bone conduction scheme. When the sound output unit  140  is configured to operate according to the bone conduction scheme, the sound output unit  140  is fit to the head when the user wears the electronic device and transmits sound by vibrating the skull. 
     In what follows, various forms of the display  300  and various methods for emitting incident image light rays will be described. 
       FIGS. 7 to 13  illustrate various display methods applicable to the display  300  according to one embodiment of the present disclosure. 
     More specifically,  FIG. 7  illustrates one embodiment of a prism-type optical element;  FIG. 8  illustrates one embodiment of a waveguide-type optical element;  FIGS. 9 and 10  illustrate one embodiment of a pin mirror-type optical element; and  FIG. 11  illustrates one embodiment of a surface reflection-type optical element. And  FIG. 12  illustrates one embodiment of a micro-LED type optical element, and  FIG. 13  illustrates one embodiment of a display used for contact lenses. 
     As shown in  FIG. 7 , the display  300 - 1  according to one embodiment of the present disclosure may use a prism-type optical element. 
     In one embodiment, as shown in  FIG. 7( a ) , a prism-type optical element may use a flat-type glass optical element where the surface  300   a  on which image light rays are incident and from which the image light rays are emitted is planar or as shown in  FIG. 7( b ) , may use a freeform glass optical element where the surface  300   b  from which the image light rays are emitted is formed by a curved surface without a fixed radius of curvature. 
     The flat-type glass optical element may receive the image light generated by the controller  200  through the flat side surface, reflect the received image light by using the total reflection mirror  300   a  installed inside and emit the reflected image light toward the user. Here, laser is used to form the total reflection mirror  300   a  installed inside the flat type glass optical element. 
     The freeform glass optical element is formed so that its thickness becomes thinner as it moves away from the surface on which light is incident, receives image light generated by the controller  200  through a side surface having a finite radius of curvature, totally reflects the received image light, and emits the reflected light toward the user. 
     As shown in  FIG. 8 , the display  300 - 2  according to another embodiment of the present disclosure may use a waveguide-type optical element or light guide optical element (LOE). 
     As one embodiment, the waveguide or light guide-type optical element may be implemented by using a segmented beam splitter-type glass optical element as shown in  FIG. 8( a ) , saw tooth prism-type glass optical element as shown in  FIG. 8( b ) , glass optical element having a diffractive optical element (DOE) as shown in  FIG. 8( c ) , glass optical element having a hologram optical element (HOE) as shown in  FIG. 8( d ) , glass optical element having a passive grating as shown in  FIG. 8( e ) , and glass optical element having an active grating as shown in  FIG. 8( f ) . 
     As shown in  FIG. 8( a ) , the segmented beam splitter-type glass optical element may have a total reflection mirror  301   a  where an optical image is incident and a segmented beam splitter  301   b  where an optical image is emitted. 
     Accordingly, the optical image generated by the controller  200  is totally reflected by the total reflection mirror  301   a  inside the glass optical element, and the totally reflected optical image is partially separated and emitted by the partial reflection mirror  301   b  and eventually perceived by the user while being guided along the longitudinal direction of the glass. 
     In the case of the saw tooth prism-type glass optical element as shown in  FIG. 8( b ) , the optical image generated by the controller  200  is incident on the side surface of the glass in the oblique direction and totally reflected into the inside of the glass, emitted to the outside of the glass by the saw tooth-shaped uneven structure  302  formed where the optical image is emitted, and eventually perceived by the user. 
     The glass optical element having a Diffractive Optical Element (DOE) as shown in  FIG. 8( c )  may have a first diffraction member  303   a  on the surface of the part on which the optical image is incident and a second diffraction member  303   b  on the surface of the part from which the optical image is emitted. The first and second diffraction members  303   a ,  303   b  may be provided in a way that a specific pattern is patterned on the surface of the glass or a separate diffraction film is attached thereon. 
     Accordingly, the optical image generated by the controller  200  is diffracted as it is incident through the first diffraction member  303   a , guided along the longitudinal direction of the glass while being totally reflected, emitted through the second diffraction member  303   b , and eventually perceived by the user. 
     The glass optical element having a Hologram Optical Element (HOE) as shown in  FIG. 8( d )  may have an out-coupler  304  inside the glass from which an optical image is emitted. Accordingly, the optical image is incoming from the controller  200  in the oblique direction through the side surface of the glass, guided along the longitudinal direction of the glass by being totally reflected, emitted by the out-coupler  304 , and eventually perceived by the user. The structure of the HOE may be modified gradually to be further divided into the structure having a passive grating and the structure having an active grating. 
     The glass optical element having a passive grating as shown in  FIG. 8( e )  may have an in-coupler  305   a  on the opposite surface of the glass surface on which the optical image is incident and an out-coupler  305   b  on the opposite surface of the glass surface from which the optical image is emitted. Here, the in-coupler  305   a  and the out-coupler  305   b  may be provided in the form of film having a passive grating. 
     Accordingly, the optical image incident on the glass surface at the light-incident side of the glass is totally reflected by the in-coupler  305   a  installed on the opposite surface, guided along the longitudinal direction of the glass, emitted through the opposite surface of the glass by the out-coupler  305   b , and eventually perceived by the user. 
     The glass optical element having an active grating as shown in  FIG. 8( f )  may have an in-coupler  306   a  formed as an active grating inside the glass through which an optical image is incoming and an out-coupler  306   b  formed as an active grating inside the glass from which the optical image is emitted. 
     Accordingly, the optical image incident on the glass is totally reflected by the in-coupler  306   a , guided in the longitudinal direction of the glass, emitted to the outside of the glass by the out-coupler  306   b , and eventually perceived by the user. 
     The display  300 - 3  according to another embodiment of the present disclosure may use a pin mirror-type optical element. 
     The pinhole effect is so called because the hole through which an object is seen is like the one made with the point of a pin and refers to the effect of making an object look more clearly as light is passed through a small hole. This effect results from the nature of light due to refraction of light, and the light passing through the pinhole deepens the depth of field (DOF), which makes the image formed on the retina more vivid. 
     In what follows, an embodiment for using a pin mirror-type optical element will be described with reference to  FIGS. 9 and 10 . 
     Referring to  FIG. 9( a ) , the pinhole mirror  310   a  may be provided on the path of incident light within the display  300 - 3  and reflect the incident light toward the user&#39;s eye. More specifically, the pinhole mirror  310   a  may be disposed between the front surface (outer surface) and the rear surface (inner surface) of the display  300 - 3 , and a method for manufacturing the pinhole mirror will be described again later. 
     The pinhole mirror  310   a  may be formed to be smaller than the pupil of the eye and to provide a deep depth of field. Therefore, even if the focal length for viewing a real world through the display  300 - 3  is changed, the user may still clearly see the real world by overlapping an augmented reality image provided by the controller  200  with the image of the real world. 
     And the display  300 - 3  may provide a path which guides the incident light to the pinhole mirror  310   a  through internal total reflection. 
     Referring to  FIG. 9( b ) , the pinhole mirror  310   b  may be provided on the surface  300   c  through which light is totally reflected in the display  300 - 3 . Here, the pinhole mirror  310   b  may have the characteristic of a prism that changes the path of external light according to the user&#39;s eyes. For example, the pinhole mirror  310   b  may be fabricated as film-type and attached to the display  300 - 3 , in which case the process for manufacturing the pinhole mirror is made easy. 
     The display  300 - 3  may guide the incident light incoming from the controller  200  through internal total reflection, the light incident by total reflection may be reflected by the pinhole mirror  310   b  installed on the surface on which external light is incident, and the reflected light may pass through the display  300 - 3  to reach the user&#39;s eyes. 
     Referring to  FIG. 9( c ) , the incident light illuminated by the controller  200  may be reflected by the pinhole mirror  310   c  directly without internal total reflection within the display  300 - 3  and reach the user&#39;s eyes. This structure is convenient for the manufacturing process in that augmented reality may be provided irrespective of the shape of the surface through which external light passes within the display  300 - 3 . 
     Referring to  FIG. 9( d ) , the light illuminated by the controller  200  may reach the user&#39;s eyes by being reflected within the display  300 - 3  by the pinhole mirror  310   d  installed on the surface  300   d  from which external light is emitted. The controller  200  is configured to illuminate light at the position separated from the surface of the display  300 - 3  in the direction of the rear surface and illuminate light toward the surface  300   d  from which external light is emitted within the display  300 - 3 . The present embodiment may be applied easily when thickness of the display  300 - 3  is not sufficient to accommodate the light illuminated by the controller  200 . Also, the present embodiment may be advantageous for manufacturing in that it may be applied irrespective of the surface shape of the display  300 - 3 , and the pinhole mirror  310   d  may be manufactured in a film shape. 
     Meanwhile, the pinhole mirror  310  may be provided in plural numbers in an array pattern. 
       FIG. 10  illustrates the shape of a pinhole mirror and structure of an array pattern according to one embodiment of the present disclosure. 
     Referring to the figure, the pinhole mirror  310  may be fabricated in a polygonal structure including a square or rectangular shape. Here, the length (diagonal length) of a longer axis of the pinhole mirror  310  may have a positive square root of the product of the focal length and wavelength of light illuminated in the display  300 - 3 . 
     A plurality of pinhole mirrors  310  are disposed in parallel, being separated from each other, to form an array pattern. The array pattern may form a line pattern or lattice pattern. 
       FIGS. 10( a ) and ( b )  illustrate the Flat Pin Mirror scheme, and  FIGS. 10( c ) and ( d )  illustrate the freeform Pin Mirror scheme. 
     When the pinhole mirror  310  is installed inside the display  300 - 3 , the first glass  300   e  and the second glass  300   f  are combined by an inclined surface  300   g  disposed being inclined toward the pupil of the eye, and a plurality of pinhole mirrors  310   e  are disposed on the inclined surface  300   g  by forming an array pattern. 
     Referring to  FIGS. 10( a ) and ( b ) , a plurality of pinhole mirrors  310   e  may be disposed side by side along one direction on the inclined surface  300   g  and continuously display the augmented reality provided by the controller  200  on the image of a real world seen through the display  300 - 3  even if the user moves the pupil of the eye. 
     And referring to  FIGS. 10( c ) and ( d ) , the plurality of pinhole mirrors  310   f  may form a radial array on the inclined surface  300   g  provided as a curved surface. 
     Since the plurality of pinhole mirrors  300   f  are disposed along the radial array, the pinhole mirror  310   f  at the edge in the figure is disposed at the highest position, and the pinhole mirror  310   f  in the middle thereof is disposed at the lowest position, the path of a beam emitted by the controller  200  may be matched to each pinhole mirror. 
     As described above, by disposing a plurality of pinhole arrays  310   f  along the radial array, the double image problem of augmented reality provided by the controller  200  due to the path difference of light may be resolved. 
     Similarly, lenses may be attached on the rear surface of the display  300 - 3  to compensate for the path difference of the light reflected from the plurality of pinhole mirrors  310   e  disposed side by side in a row. 
     The surface reflection-type optical element that may be applied to the display  300 - 4  according to another embodiment of the present disclosure may employ the freeform combiner method as shown in  FIG. 11( a ) , Flat HOE method as shown in  FIG. 11( b ) , and freeform HOE method as shown in  FIG. 11( c ) . 
     The surface reflection-type optical element based on the freeform combiner method as shown in  FIG. 11( a )  may use freeform combiner glass  300 , for which a plurality of flat surfaces having different incidence angles for an optical image are combined to form one glass with a curved surface as a whole to perform the role of a combiner. The freeform combiner glass  300  emits an optical image to the user by making incidence angle of the optical image differ in the respective areas. 
     The surface reflection-type optical element based on Flat HOE method as shown in  FIG. 11( b )  may have a hologram optical element (HOE)  311  coated or patterned on the surface of flat glass, where an optical image emitted by the controller  200  passes through the HOE  311 , reflects from the surface of the glass, again passes through the HOE  311 , and is eventually emitted to the user. 
     The surface reflection-type optical element based on the freeform HOE method as shown in  FIG. 11( c )  may have a HOE  313  coated or patterned on the surface of freeform glass, where the operating principles may be the same as described with reference to  FIG. 11( b ) . 
     In addition, a display  300 - 5  employing micro LED as shown in  FIG. 12  and a display  300 - 6  employing a contact lens as shown in  FIG. 13  may also be used. 
     Referring to  FIG. 12 , the optical element of the display  300 - 5  may include a Liquid Crystal on Silicon (LCoS) element, Liquid Crystal Display (LCD) element, Organic Light Emitting Diode (OLED) display element, and Digital Micromirror Device (DMD); and the optical element may further include a next-generation display element such as Micro LED and Quantum Dot (QD) LED. 
     The image data generated by the controller  200  to correspond to the augmented reality image is transmitted to the display  300 - 5  along a conductive input line  316 , and the display  300 - 5  may convert the image signal to light through a plurality of optical elements  314  (for example, microLED) and emits the converted light to the user&#39;s eye. 
     The plurality of optical elements  314  are disposed in a lattice structure (for example, 100×100) to form a display area  314   a . The user may see the augmented reality through the display area  314   a  within the display  300 - 5 . And the plurality of optical elements  314  may be disposed on a transparent substrate. 
     The image signal generated by the controller  200  is sent to an image split circuit  315  provided at one side of the display  300 - 5 ; the image split circuit  315  is divided into a plurality of branches, where the image signal is further sent to an optical element  314  disposed at each branch. At this time, the image split circuit  315  may be located outside the field of view of the user so as to minimize gaze interference. 
     Referring to  FIG. 13 , the display  300 - 5  may comprise a contact lens. A contact lens  300 - 5  on which augmented reality may be displayed is also called a smart contact lens. The smart contact lens  300 - 5  may have a plurality of optical elements  317  in a lattice structure at the center of the smart contact lens. 
     The smart contact lens  300 - 5  may include a solar cell  318   a , battery  318   b , controller  200 , antenna  318   c , and sensor  318   d  in addition to the optical element  317 . For example, the sensor  318   d  may check the blood sugar level in the tear, and the controller  200  may process the signal of the sensor  318   d  and display the blood sugar level in the form of augmented reality through the optical element  317  so that the user may check the blood sugar level in real-time. 
     As described above, the display  300  according to one embodiment of the present disclosure may be implemented by using one of the prism-type optical element, waveguide-type optical element, light guide optical element (LOE), pin mirror-type optical element, or surface reflection-type optical element. In addition to the above, an optical element that may be applied to the display  300  according to one embodiment of the present disclosure may include a retina scan method. 
       FIG. 14  is a front view of a wearer wearing an electronic device  20  associated with the present disclosure, and  FIG. 15  is a front perspective view. 
     As described above, electronic device  20  of the present disclosure is provided and worn as an eyeglasses type. Electronic device  20  of the eyeglasses type supports a nose  604  and an ear  603  to be supported and mounted on a head  601  of a wearer. 
     An optical driving assembly  200  emits image light corresponding to augmented reality information, and the emitted image light is incident on an optical element  311  to form an output area. Optical element  311  may be provided in a range of a vision of a left eye  602 L and a right eye  602 R of the wearer. 
     Optical element  311  may be provided in the form of a pair of optical elements  311  corresponding to left eye  602 L and right eye  602 R as shown in  FIG. 14 , but in some cases, it can be implemented in an integrated form without distinction of left eye  602 L and right eye  602 R. Since the image light emitted from the optical driving assembly  200  is not output to the entire area of optical element  311 , optical driving assembly  200  may be provided only for one side if optical element  311  corresponding to the left eye and optical element  311  corresponding to the right eye are provided to be physically divided. Optical element  311  may include an optically transparent material to allow the wearer to visually recognize the real world together. In this case, optical element  311  may include a photopolymer material. 
     A front frame  410  is combined with optical element  311  to form a front shape of electronic device  20 . Front frame  410  also serves to fix optical element  311 . For example, front frame  410  surrounds edges of optical element  311  and fixes optical element  311  so as not to fall out, and prevents optical element  311  from being damaged by an external force. 
     A side frame  460  is coupled to front frame  410  to implement the structure of a leg of the eyeglasses to form an eyeglasses type body with front frame  410 . 
     Front frame  410  and side frame  460  may provide a counterpart to which optical driving assembly  200  is provided or coupled. 
     A support member  500  is coupled to front frame  410  to support at least one region of the wearer&#39;s nose. Unlike the nose support, which is implemented in conventional eyeglasses or the like, support member  500  of the present disclosure is formed to have a large area to support the wearer&#39;s nose. 
     In order to implement support for a large area, support member  500  is provided with a low melting elastomer. The low melting elastomer is a material that is deformable under low temperature conditions and may change in shape to be in close contact with nose  604  by body temperature when worn. Elastomer refers to a plastic material with elasticity, which is a synthetic resin that combines the advantage of rubber that stretches with the applied force and the advantage of plastic that can be easily processed. For example, support member  500  may include an olefin-based polymer. Olefin refers to unsaturated hydrocarbons produced during the refining of natural gas or crude oil. 
     In addition, support member  500  supports at two points in the area supporting the left side of nose  604  and at two points in the area supporting the right side of nose  604  as well so that support member  500  provided for a large area can be supported. Therefore, a total of four fixing areas  510  of support member  500  are fixed to front frame  410 . If it is divided into the left and right sides with respect to a vertical center axis V of front frame  410 , fixing areas  510  of two points are fixed on the left side of front frame  410 , and fixing areas  510  of the remaining two points are fixed on the right side of front frame  410 . 
     A left side flexible area  520  between two left side fixing areas  510  of support member  500  and a right side flexible area  520  between two right side fixing areas  510  are flexibly deformable in accordance with the purpose of support member  500 . Left side flexible area  520  and right side flexible area  520  are deformed and supported to correspond to the left side area shape and the right side area shape of nose  604 , respectively. 
     Fixing areas  510  of support member  500  may be located at a pair of upper points  511 U and a pair of lower points  511 L provided in lateral symmetry with respect to front frame  410 . Upper point fixing areas  511 U may be located on a horizontal axis H across the root of the wearer&#39;s nose  604  with respect to the front of the wearer wearing electronic device  20 . This is to support nose  604  in the downward direction from the root of nose  604 . Based on the front and rear direction of electronic device  20 , upper point fixing areas  511 U are located behind the protruding portion of the root of nose  604  to prevent support member  500  from coming out from nose  604  easily. 
     Meanwhile, fixing areas  510  of the lower points may be provided at the bottom of front frame  410 . In particular, fixing areas  510  of the lower points may be the lowest point of front frame  410 , which is the bottom point of front frame  410  passing through the cheekbone center vertical axis G with respect to the front when the wearer is wearing electronic device  20 . In particular, with respect to the front and rear direction, the lowest point of front frame  410  is preferably located on the same line as the horizontal axis F passing through the highest point of the cheekbone. 
     Due to the locations of the fixing areas  510  described above, flexible areas  520  can support the wide areas of the left and right sides of the wearer&#39;s nose  604  without pressurizing the wings of the nose, which does not provide a feeling of foreign body or discomfort to the wearer. 
     Flexible area  520  may include a horizontal portion  521  located at the bottom and a vertical portion  522  provided in a vertical direction to form a curved area  523  connected at an inner end of horizontal portion  521 . Typically, vertical portion  522  of flexible area  520  is in close contact with nose  604  directly, and horizontal portion  521  is provided secondarily to maintain the shape of vertical portion  522  and provide sufficient flexibility to vertical portion  522 . The surface of vertical portion  522  may be provided to face the left and right sides, and the surface of horizontal portion  521  may be provided to face upward. 
     Front frame  410  may have an open area  4101  corresponding to the shape of the wearer&#39;s nose  604  so that nose  604  does not interfere with optical element  311  being in close contact with the wearer&#39;s face. When front frame  410  covers and fixes the side edge of optical element  311 , support member  500  may be provided such that a surface facing the corresponding area may be formed in open area  4101  to overlap the area of front frame  410  fixing optical element  311  in the thickness direction. 
     The length from upper point fixing area  511 U to the lower point fixing area  511 L of support member  500  is formed to be longer than the same point-to-point length of the boundary of front frame  410 . This is to prevent the deformation of support member  500  from being interfered by optical element  311  or front frame  410  of open area  4101  and to provide a sufficient deformable margin length to correspond to various nose shapes even if support member  500  is supported and pressurized by nose  604 . 
     A connecting portion  501  of support member  500  connects upper point fixing areas  511 U provided in lateral symmetry. Connecting portion  501  connects the areas supporting nose  604  on the left side and the right side, respectively, so that support member  500  can be formed as an integrated member. 
     The integrated support member  500  having connecting portion  501  may have a plate shape having a uniform thickness when unfolded. Support member  500  of the plate shape may be bent and coupled to front frame  410  to have an omega (‘Ω’) shape with respect to the front. 
     Support member  500  may have a different width for each area with respect to the front and rear direction of electronic device  20 . Upper point and lower point fixing areas  511 L may have a narrow width to be embodied in a shape that is easy to couple to front frame  410 , and is prevented from excessive protrusion that interfere with wearing. Curved area  523  bent from horizontal portion  521  to be led to vertical portion  522  is formed to have a wider width than that of fixing area  510  to provide a certain degree of shape retention force to vertical portion  522  of flexible area  520 . 
     Front frame  410  may have a form that is divided into a left eye frame  411 L and a right eye frame  411 R. 
     Connecting portion  501  of support member  500  also serves to connect left eye frame  411 L and right eye frame  411 R to fix each other. 
     When connecting portion  501  is provided with a rigid material, left eye frame  411 L and right eye frame  411 R may be connected and fixed only by connecting portion  501 . 
     On the other hand, when connecting portion  501  has the same material characteristics as flexible area  520 , it is insufficient to fix both eye frames  411 L and  411 R to each other. Therefore, a connecting frame  420  may be additionally provided. Connecting frame  420  connects left eye frame  411 L and right eye frame  411 R to fix left eye frame  411 L and right eye frame  411 R together with connecting portion  501 . Connecting frame  420  may be provided at the upper side of front frame  410 . 
     Connecting frame  420  may be deformed below a predetermined angle range to change the distance or relative angle between left eye frame  411 L and right eye frame  411 R within a predetermined range. 
     For deformation, connecting frame  420  may include a left side connecting frame  421 L and a right side connecting frame  421 R. Left side connecting frame  421 L is connected to left eye frame  411 L, and right side connecting frame  421 R is connected to right eye frame  411 R. Left side connecting frame  421 L and right side connecting frame  421 R may be connected by a deformation member  431 . Deformation member  431  connects left side connecting frame  421 L and right side connecting frame  421 R to be tilted below a predetermined angle range. 
     Deformation member  431  may be a hinge member  4311  for pivot-engaging left side connecting frame  421 L and right side connecting frame  421 R. Hinge member  4311  is provided in a free-stop manner so that the fixed state of the distance or angle between left eye frame  411 L and right eye frame  411 R can be maintained. 
     The range of deformation angles between left eye frame  411 L and right eye frame  411 R may be limited, in particular, to 5 degrees. This is because the image light emitted from optical driving assembly  200  may be incident at an unintended point if both eye frames  411 L and  411 R rotate in an excessively large angle range. 
       FIG. 16  is a cross-sectional view taken along the A-A′ direction of  FIG. 15 . 
     Support member  500  may be fixed to front frame  410  by an insertion method. Left eye frame  411 L and right eye frame  411 R of front frame  410  have a cross section recessed to fix both sides of upper point fixing area  511 U of support member  500  at each point facing the open area. For example, the recessed cross section may have a cross section of a ‘c’ shape in which a recessed area  413  faces the open area. 
     Alternatively, left eye frame  411 L and right eye frame  411 R may have protruding ends  412  protruding from both sides to implement a cross-section of the ‘c’ shape, on the contrary. This is appropriate when left eye frame  411 L and right eye frame  411 R are formed as a thin frame to surround optical element  311 . 
     The width of recessed area  413  corresponds to the width of upper point fixing area  511 U of support member  500  so as to tightly fit and fix upper point fixing area  511 U of support member  500  to recessed area  413 . 
       FIG. 17  is a cross-sectional view taken along the B-B′ direction of  FIG. 15 . 
     Unlike the coupling method of upper point fixing area  511 U of support member  500 , lower point fixing area  511 L of support member  500  may be fixed by hook coupling. This is to prevent the problem that lower point fixing area  511 L of support member  500  is separated from the lower end of front frame  410  by the load. 
     In particular, the hook coupling can be fitted in the front and rear direction (or side direction) other than coupling in the vertical direction. For example, support member  500  may be hook coupled to front frame  410  from the rear to the front. When coupled in this direction, it does not fall off even when support member  500  is pulled forward by an unintended external force. Lower point fixing area  511 L of support member  500  has a coupling protrusion  502  which protrudes upward and has a circular horizontal cross section for engaging from the rear to the front, and front frame  410  may have a hook groove  414  of which horizontal cross section corresponds to the circle of coupling protrusion  502  for coupling protrusion  502  to be inserted and fixed. The front of hook groove  414  may be blocked and the rear may have an aperture area  415  to allow coupling protrusion  502  to move from the rear to the front to fit. 
       FIG. 18  shows another example of an electronic device  20  associated with the present disclosure. 
     Unlike the embodiment above described, support member  500  may be implemented by only two members disconnected with each other without connecting portion  501 , that is, left eye support member  500 L and right eye support member  500 R. When left eye support member  500 L and right eye support member  500 R are formed separately, it is advantageous that support member  500  and front frame  410  can be easily attached or detached, and the distance and angle of left eye frame  411 L and right eye frame  411 R are not limited, so the degree of freedom is increased. If support member  500  is implemented in two without connecting portion  501 , left eye frame  411 L and right eye frame  411 R are fixed only by connecting frame  420 , not by connecting portion  501 . 
     Other features can be applied within the scope that does not contradict the contents described in the above embodiments. 
       FIG. 19  shows another example of an electronic device  20  associated with the present disclosure. 
     Deformation member  431  connecting left side connecting frame  421 L and right side connecting frame  421 R may be provided in a form of a wire  4312  which is fixed in shape and may finely adjust the angle and distance between left eye frame  411 L and right eye frame  411 R. Wire  4312  may have a shape twisted into a spring shape to have a restoring force. 
     The above detailed description should not be construed as limiting in all respects but should be considered as illustrative. The scope of the present disclosure should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present disclosure are included in the scope of the present disclosure. 
     Some or other embodiments of the present disclosure described above are not exclusive or distinct from one another. Certain embodiments or other embodiments of the present disclosure described above may be combined or used together in each configuration or function. 
     For example, it means that A configuration described in certain embodiments and/or drawings and B configuration described in other embodiments and/or drawings may be combined. In other words, even when the combination between the configurations is not described directly, it means that the combination is possible unless clearly stated otherwise. 
     The detailed descriptions above should be regarded as being illustrative rather than restrictive in every aspect. The technical scope of the present disclosure should be determined by a reasonable interpretation of the appended claims, and all of the modifications that fall within an equivalent scope of the present disclosure belong to the technical scope of the present disclosure. 
     The advantageous effects of the electronic device according to the present disclosure will be described below. 
     According to at least one of the embodiments of the present disclosure, the weight of the electronic device applied to the wearer is distributed to reduce discomfort. 
     Further, according to at least one of the embodiments of the present disclosure, the shape of the support surface varies according to the shape of the nose of the wearer to implement stable support. 
     In addition, according to at least one of the embodiments of the present disclosure, the nose support area may be widened or narrowed from side to side depending on the size of the wearer&#39;s nose.