Light guide device and electronic device comprising the same

Abstract

Disclosed in the embodiments is a light guide device, comprising: a frame; and a cover, a first substrate and a second substrate arranged on the frame in sequence, wherein the frame comprises a first step structure and a second step structure, the cover is arranged on the first step structure, and the first substrate is arranged on the second step structure.

Description

Technical Field

[0001] The embodiments relate to a light guiding device and an electronic device including the light guiding device. Background Technology

[0002] Virtual Reality (VR) refers to a specific environment or situation that is similar to but not exactly the same as the real world, generated by artificial technologies such as computers, or to the technology itself.

[0003] Augmented Reality (AR) is a technology used to synthesize virtual objects or information with the real environment so that the synthesized virtual objects or information look like real objects or information existing in the real environment.

[0004] Mixed Reality (MR) is a technology used to combine the virtual and real worlds to create new environments or information. Specifically, MR is an experience where real and virtual objects interact with each other in real time.

[0005] In this context, the generated virtual environment or situation stimulates the user's five senses and allows the user to have a spatial and temporal experience similar to reality, freely traversing the boundary between reality and imagination. Furthermore, users can not only simply immerse themselves in such an environment, but also interact with objects realized within it by manipulating real devices or giving commands.

[0006] Recently, research has been actively conducted on equipment and devices used in these technological fields. However, the need to miniaturize these devices and improve their optical performance is growing. Summary of the Invention

[0007] [Technical Issues]

[0008] The embodiments provide a light guide device with improved durability and an electronic device including the light guide device.

[0009] In addition, a light guide device with a simplified manufacturing process and an electronic device including the light guide device are provided.

[0010] Additionally, a light guide device that can reduce errors during the assembly process and an electronic device including the light guide device are provided.

[0011] In addition, a light guide device with improved optical performance and an electronic device including the light guide device are provided.

[0012] The objectives to be addressed in the implementation are not limited to this, and the implementation may also include objectives or effects that can be understood from the solutions to the problem or implementation described below.

[0013] [Technical Solutions]

[0014] According to the embodiment, the light guide device includes a frame and a cover, a first substrate, and a second substrate sequentially disposed on the frame. The frame includes a first step structure and a second step structure, the cover is disposed on the first step structure, and the first substrate is disposed on the second step structure.

[0015] The cover, the first substrate, and the second substrate may be arranged to be spaced apart from each other in a first direction, the first step structure may protrude from the inner surface of the frame in a direction perpendicular to the first direction, and the second step structure may protrude from the side surface of the first step structure in a direction perpendicular to the first direction.

[0016] The cover may overlap with the first step structure in the first direction, and the first substrate may overlap with the first step structure in a direction perpendicular to the first direction.

[0017] The first substrate may overlap with the second stepped structure in a first direction, and the second substrate may overlap with the second stepped structure in a direction perpendicular to the first direction.

[0018] The area of ​​the cover can be larger than the area of ​​the first substrate, and the area of ​​the first substrate can be larger than the area of ​​the second substrate.

[0019] The frame may include a first groove and a second groove spaced apart from the first groove.

[0020] The first groove can be provided in the first step structure, and the second groove can be provided in each step structure in the first step structure and the second step structure.

[0021] The second groove may include a first portion that overlaps with the first step structure in the first direction and a second portion that overlaps with the second step structure in the first direction.

[0022] The second part can pass through the second step structure in a direction perpendicular to the first direction.

[0023] The second part can pass through the second step structure in the first direction.

[0024] The width of the first part in the second direction perpendicular to the first direction may be less than the width of the first step structure in the second direction, and the second direction may be a direction parallel to the long axis of the frame.

[0025] The height of the first step structure in the first direction can be greater than the thickness of the first substrate, and the height of the second step structure in the first direction can be greater than the thickness of the second substrate.

[0026] The frame may include a first protrusion projecting from the inner surface of the frame along a second direction perpendicular to the first direction, and a second protrusion projecting along a third direction perpendicular to both the first and second directions. The second direction may be parallel to the major axis of the frame, and the third direction may be parallel to the minor axis of the frame.

[0027] The light guide device according to the embodiment may include a first input diffraction element disposed on a first substrate and onto which light is incident, and a first protrusion may overlap with the center of the first input diffraction element in a direction parallel to a second direction.

[0028] The second protrusion can overlap with the center of the first input diffraction element in a direction parallel to the third direction.

[0029] The cover may include a first groove and a second groove, the first substrate may include a third groove and a fourth groove, and the second substrate may include a fifth groove and a sixth groove.

[0030] The first groove, the third groove, and the fifth groove may overlap with the first protrusion in the first direction, and the second groove, the fourth groove, and the sixth groove may overlap with the second protrusion in the first direction.

[0031] [Beneficial Effects]

[0032] According to embodiments, a light guide device with improved durability and an electronic device including the light guide device can be provided.

[0033] Alternatively, a light guide device with a simplified manufacturing process and an electronic device including the light guide device can be provided.

[0034] Alternatively, a light guide device that can reduce errors during the assembly process and an electronic device including the light guide device can be provided.

[0035] Alternatively, a light guide device with improved optical performance and an electronic device including the light guide device can be provided.

[0036] The various and beneficial advantages and effects of the present invention are not limited to those described above, and can be more readily understood in the process of describing specific embodiments of the invention. Attached Figure Description

[0037] Figure 1 This is a conceptual diagram illustrating an artificial intelligence (AI) device according to an embodiment.

[0038] Figure 2 This is a block diagram illustrating the configuration of an electronic device for extended reality according to an embodiment of the present invention.

[0039] Figure 3 This is a perspective view of an electronic device for augmented reality according to an embodiment of the present invention.

[0040] Figure 4 This is a schematic diagram of a light guide device according to an embodiment of the present invention.

[0041] Figure 5 This is a schematic diagram of a light guide device according to an embodiment of the present invention.

[0042] Figure 6 This is an enlarged perspective view of a portion of the frame of a light guide device according to an embodiment of the present invention.

[0043] Figure 7 This is an enlarged top view of a portion of the frame of the light guide device according to an embodiment of the present invention.

[0044] Figure 8 This is an enlarged top view of a portion of the frame of a light guide device according to another embodiment of the present invention.

[0045] Figure 9 This is a top view of the first substrate according to an embodiment of the present invention. Detailed Implementation

[0046] In the following description, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

[0047] However, the spirit of the present invention is not limited to the few embodiments described and can be implemented using various other embodiments. Furthermore, within the scope of the spirit of the present invention, at least one component of an embodiment can be selectively coupled, replaced, and used to implement the spirit of the present invention.

[0048] Furthermore, unless otherwise explicitly and specifically defined by the context, all terms used herein (including technical and scientific terms) are to be interpreted as having the meanings commonly used by those skilled in the art, and the meanings of commonly used terms, such as those defined in general dictionaries, will be interpreted by taking into account the contextual meaning of the relevant art.

[0049] Furthermore, the terminology used in the embodiments of this invention is for the purpose of describing the embodiments and is not intended to limit the invention.

[0050] In this specification, unless otherwise expressly indicated by the context, the singular form includes its plural form, and in the case of describing “at least one of A, B and C (or one or more of them)”, this may include at least one of all combinations that can be combined with A, B and C.

[0051] In addition, in the description of the components of the present invention, terms such as "first", "second", "A", "B", "(a)" and "(b)" may be used.

[0052] These terms are only used to distinguish one element from another, and the nature, order, etc., of the elements are not limited by these terms.

[0053] Additionally, it should be understood that when an element is referred to as being “connected or coupled” to another element, such a description can include both cases where the element is directly connected or coupled to the other element and cases where the element is connected or coupled to the other element using another element disposed between the element and the other element.

[0054] Additionally, when any element is described as being formed or disposed "above or below" another element, such a description includes both cases where the two elements are formed or disposed in direct contact with each other and cases where one or more other elements are located between the two elements. Furthermore, when an element is described as being disposed "above or below" another element, such a description can include cases where one element is disposed on the upper or lower side relative to the other element.

[0055] Figure 1 This is a conceptual diagram illustrating an artificial intelligence (AI) device according to an embodiment.

[0056] Reference Figure 1 In the AI ​​system, at least one of the following is connected to the cloud network 10: AI server 16, robot 11, autonomous vehicle 12, extended reality (XR) device 13, smartphone 14, and home appliance 15. Here, the robot 11, autonomous vehicle 12, XR device 13, smartphone 14, and home appliance 15 that apply AI technology can be referred to as AI devices 11 to 15.

[0057] Cloud network 10 can be a network that forms part of or exists within cloud computing infrastructure. Here, cloud network 10 can be constructed using 3G, 4G, LTE, or 5G networks.

[0058] In other words, the devices 11 to 16 constituting the AI ​​system can be connected to each other via the cloud network 10. Specifically, the devices 11 to 16 can communicate with each other via a base station, but they can also communicate directly with each other without a base station.

[0059] The AI server 16 may include a server that performs AI processing and a server that performs calculations on big data.

[0060] The AI server 16 may be connected via the cloud network 10 to at least one of AI devices such as the robot 11, the autonomous driving vehicle 12, the XR device 13, the smartphone 14, and the home appliance 15 that make up the AI system, and may assist with at least a part of the AI processing of the connected AI devices 11 to 15.

[0061] In this case, the AI server 16 may train an artificial neural network on behalf of the AI devices 11 to 15 according to a machine learning algorithm, and may directly store the learning model or send the learning model to the AI devices 11 to 15.

[0062] In this case, the AI server 16 may receive input data from the AI devices 11 to 15, may use the learning model to infer the result value of the received input data, and may generate a response or a control instruction based on the inferred result value to send the response or the control instruction to the AI devices 11 to 15.

[0063] Alternatively, the AI devices 11 to 15 may use a direct learning model to infer the result value of the input data, and may generate a response or a control command based on the inferred result value.

[0064] <AI + Robot>

[0065] The robot 11 may be implemented as a guiding robot, a transport robot, a cleaning robot, a wearable robot, an entertainment robot, a pet robot, an unmanned flying robot, etc. that apply AI technology.

[0066] The robot 11 may include a robot control module for controlling operations, and the robot control module may be a software module or a chip in which software modules are implemented using hardware.

[0067] By using sensor information obtained from various types of sensors, the robot 11 may acquire the state information of the robot 11, detect (identify) the surrounding environment and objects, generate map data, determine a movement route and a driving plan, determine a response to user interaction, or determine an operation.

[0068] Here, the robot 11 may use sensor information obtained from at least one sensor such as a lidar, a radar, and a camera device to determine a movement route and a driving plan.

[0069] The robot 11 can perform the operations described above using a learning model composed of at least one artificial neural network. For example, the robot 11 can use the learning model to recognize the surrounding environment and nearby objects, and can use the recognized surrounding environment information or nearby object information to determine operations. Here, the learning model can be directly trained in the robot 11, or can be trained in an external device such as the AI server 16.

[0070] In this case, the robot 11 can directly use the learning model to generate results to perform operations, or can send sensor information to an external device such as the AI server 16 and receive the results generated based on the sent sensor information to perform operations.

[0071] The robot 11 can use at least one of map data, object information detected from sensor information, and object information obtained from an external device to determine a movement route and a driving plan, and can control the driving unit to drive the robot 11 according to the determined movement route and driving plan.

[0072] The map data can include object recognition information about various objects set in the space where the robot 11 moves. For example, the map data can include object recognition information about fixed objects such as walls and doors, and movable objects such as basins and tables. The object recognition information can include name, type, distance, position, etc.

[0073] In addition, the robot 11 can perform operations or travel by controlling the driving unit based on user control / interaction. In this case, the robot 11 can obtain intention information of the interaction caused by the user's operation or voice utterance, and determine a response based on the obtained intention information to perform operations.

[0074] <AI + Autopilot>

[0075] The autonomous driving vehicle 12 can be implemented as a mobile robot, a vehicle, an unmanned aerial vehicle, etc. that apply AI technology.

[0076] The autonomous driving vehicle 12 can include an autonomous driving control module for controlling the autonomous driving function, and the autonomous driving control module can be a software module or a chip that implements the software module using hardware. The autonomous driving control module can be included inside the autonomous driving vehicle 12 as a component of the autonomous driving vehicle 12, or can be set outside the autonomous driving vehicle 12 as a separate hardware and connected to the autonomous driving vehicle 12.

[0077] By using sensor information acquired from various types of sensors, autonomous vehicle 12 can acquire state information, detect (identify) the surrounding environment and objects, generate map data, determine movement routes and driving plans, or determine operations.

[0078] Here, in order to determine the route and driving plan, similar to robot 11, autonomous vehicle 12 can use sensor information obtained from at least one of the sensors, including lidar, radar and camera devices.

[0079] Specifically, the autonomous vehicle 12 can identify the environment or objects in areas where the field of vision is obstructed or in areas at a certain distance or further away by receiving sensor information from external devices, or it can directly receive the identified information from external devices.

[0080] The autonomous vehicle 12 can perform the operations described above using a learning model composed of at least one artificial neural network. For example, the autonomous vehicle 12 can use the learning model to identify the surrounding environment and objects, and can use the identified surrounding environment information or object information to determine the driving process. Here, the learning model can be trained directly in the autonomous vehicle 12 or from an external device such as an AI server 16.

[0081] In this scenario, the autonomous vehicle 12 can directly use the learning model to generate results for performing operations, or it can send sensor information to an external device such as an AI server 16 and receive results generated based on the sent sensor information for performing operations.

[0082] The autonomous vehicle 12 can use at least one of map data, object information detected from sensor information, and object information obtained from external devices to determine a route and driving plan, and can control the drive unit to drive the autonomous vehicle 12 according to the determined route and driving plan.

[0083] Map data may include object identification information about various objects situated in the space where the autonomous vehicle 12 is traveling (e.g., on a road). For example, map data may include object identification information about fixed objects such as streetlights, rocks, and buildings, as well as movable objects such as vehicles and pedestrians. Object identification information may include name, type, distance, location, etc.

[0084] Additionally, the autonomous vehicle 12 can perform operations or move by using a user-based control / interaction control drive unit. In this case, the autonomous vehicle 12 can acquire intent information about interactions caused by user actions or voice commands, and can determine a response to perform an operation based on the acquired intent information.

[0085] <AI+XR>

[0086] The XR device 13 can be implemented as a head-mounted display (HMD) applying AI technology, a head-up display (HUD) installed in a vehicle, a television, a mobile phone, a smartphone, a computer, a wearable device, a household appliance, a digital signage, a vehicle, a stationary robot, or a mobile robot.

[0087] The XR device 13 can generate position data and attribute data about three-dimensional points by analyzing three-dimensional point cloud data or image data obtained through various sensors or from external devices, can obtain information about the surrounding space or real objects based on the generated position data and attribute data, and can output an XR object by rendering the output XR object. For example, the XR device 13 can output an XR object including additional information about the recognized object by making the XR object correspond to the corresponding recognized object.

[0088] The XR device 13 can use a learning model composed of at least one artificial neural network to perform the operations described above. For example, the XR device 13 can use the learning model to identify real objects from three-dimensional point cloud data or image data, and can provide information corresponding to the identified real objects. Here, the learning model can be directly trained in the XR device 13 or in an external device such as the AI server 16.

[0089] In this case, the XR device 13 can directly use the learning model to generate results to perform operations, or can send sensor information to an external device such as the AI server 16 and receive results generated according to the sent sensor information to perform operations.

[0090] <AI+Robot+Autopilot>

[0091] The robot 11 can be implemented as a guiding robot, a transportation robot, a cleaning robot, a wearable robot, an entertainment robot, a pet robot, an unmanned flying robot, etc. applying AI technology and autopilot technology.

[0092] The robot 11 applying AI technology and autopilot technology can be a robot itself having an autopilot function or a robot 11 interacting with an autonomous driving vehicle 12.

[0093] The robot 11 having an autopilot function can be any device that autonomously travels along a given process or autonomously determines the process of travel without user control.

[0094] The robot 11 with autonomous driving function and the autonomous vehicle 12 can use a common sensing method to determine at least one of the movement route and the driving plan. For example, the robot 11 with autonomous driving function and the autonomous vehicle 12 can use the information detected by lidar, radar or camera device to determine at least one of the movement route and the driving plan.

[0095] The robot 11 interacting with the autonomous vehicle 12 can exist separately from the autonomous vehicle 12, and can perform operations associated with the autonomous driving function inside or outside the autonomous vehicle 12 or associated with the user in the autonomous vehicle 12.

[0096] In this case, the robot 11 interacting with the autonomous vehicle 12 can control or assist the autonomous driving function of the autonomous vehicle 12 by obtaining sensor information on behalf of the autonomous vehicle 12 to provide the sensor information to the autonomous vehicle 12, or by obtaining sensor information and generating surrounding environment information or object information to provide the surrounding environment information or object information to the autonomous vehicle 12.

[0097] Alternatively, the robot 11 interacting with the autonomous vehicle 12 can control the function of the autonomous vehicle 12 by monitoring the user in the autonomous vehicle 12 or through interaction with the user. For example, when it is determined that the driver is sleepy, the robot 11 can activate the autonomous driving function of the autonomous vehicle 12 or assist in controlling the drive unit of the autonomous vehicle 12. Here, the functions of the autonomous vehicle 12 controlled by the robot 11 can not only simply include the autonomous driving function, but also include the functions provided by the navigation system or audio system provided inside the autonomous vehicle 12.

[0098] Alternatively, the robot 11 interacting with the autonomous vehicle 12 can provide information to the autonomous vehicle 12 or can assist the functions outside the autonomous vehicle 12. For example, the robot 11 can provide traffic information including signal information, etc. to the autonomous vehicle 12 like an intelligent traffic light, etc., or can interact with the autonomous vehicle 12 like an automatic charger for an electric vehicle to automatically connect the charger to the charging port.

[0099] <AI+Robot+XR>

[0100] The robot 11 can be implemented as a guiding robot, a transporting robot, a cleaning robot, a wearable robot, an entertainment robot, a pet robot, an unmanned flying robot, etc. applying AI technology and XR technology.

[0101] The robot 11 applying XR technology can be a robot that undergoes control / interaction in the XR image. In this case, the robot 11 can be distinguished from the XR device 13 and can cooperate with the XR device 13.

[0102] When the robot 11 that undergoes control / interaction in the XR image obtains sensor information from a sensor including a camera device, the robot 11 or the XR device 13 can generate an XR image based on the sensor information, and the XR device 13 can output the generated XR image. The robot 11 can operate based on a control signal input through the XR device 13 or user interaction.

[0103] For example, the user can confirm the XR image corresponding to the time point of the robot 11 cooperating remotely through an external device such as the XR device 13, can adjust the autonomous driving route of the robot 11 through interaction, can control the operation or driving, or can confirm information about nearby objects.

[0104] <AI + Autopilot + XR>

[0105] The autonomous driving vehicle 12 can be implemented as a mobile robot, vehicle, unmanned aerial vehicle, etc. applying AI technology and XR technology.

[0106] The autonomous driving vehicle 12 applying XR technology can be an autonomous driving vehicle equipped with components for providing XR images, an autonomous driving vehicle that undergoes control / interaction in the XR image, etc. In particular, the autonomous driving vehicle 12 that undergoes control / interaction in the XR image is distinguished from the XR device 13 and can cooperate with the XR device 13.

[0107] The autonomous driving vehicle 12 equipped with components for providing XR images can obtain sensor information from a sensor including a camera device and can output an XR image generated based on the obtained sensor information. For example, the autonomous driving vehicle 12 can include a HUD to output an XR image, thereby providing an XR object corresponding to a real object or an object on the screen to the passengers.

[0108] In this case, when the XR object is displayed on the HUD, at least a part of the XR object can be displayed to overlap with the real object pointed by the passenger's line of sight. On the other hand, when the XR object is displayed on the display installed inside the autonomous driving vehicle 12, at least a part of the XR object can be displayed to overlap with the object on the screen. For example, the autonomous driving vehicle 12 can output an XR object corresponding to an object such as a lane, another vehicle, a traffic light, a traffic sign, a two-wheeled vehicle, a pedestrian, or a building.

[0109] When the autonomous vehicle 12, which is subject to control / interaction in an XR image, can acquire sensor information from sensors including camera devices, the autonomous vehicle 12 or the XR device 13 can generate an XR image based on the sensor information, and the XR device 13 can output the generated XR image. The autonomous vehicle 12 can operate based on control signals input through external devices such as the XR device 13 or user interaction.

[0110] XR technology

[0111] XR is a general term for Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR). VR technology provides real-world objects and backgrounds only as computer-generated (CG) images, AR technology provides virtually generated CG images on top of real-world object images, and MR technology is a computer graphics technology that blends and combines virtual objects into the real world.

[0112] MR technology is similar to AR technology in that real and virtual objects are displayed together. However, in AR technology, virtual objects are used to complement real objects, while in MR technology, virtual and real objects are used in the same way.

[0113] XR technology can be applied to HMDs, HUDs, mobile phones, tablet PCs, laptops, desktop computers, televisions (TVs), digital signage, and more. Devices that utilize XR technology can be referred to as XR devices.

[0114] In the following, an electronic device for providing XR according to an embodiment of the present invention will be described in detail. In particular, a projection device for AR and an electronic device including the projection device will be described in detail.

[0115] Figure 2 This is a block diagram illustrating the configuration of an electronic device 20 for XR according to an embodiment of the present invention.

[0116] Reference Figure 2 The electronic device 20 for XR may include a wireless communication unit 21, an input unit 22, a sensing unit 23, an output unit 24, an interface unit 25, a memory 26, a control unit 27, and a power supply unit 28. Because... Figure 2 The components shown are not essential for implementing the electronic device 20, and therefore the electronic device 20 described in this specification may include more or fewer components than those listed above.

[0117] More specifically, in the above components, the wireless communication unit 21 may include one or more modules capable of wireless communication between the electronic device 20 and a wireless communication system, between the electronic device 20 and another electronic device, or between the electronic device 20 and an external server. Additionally, the wireless communication unit 21 may include one or more modules for connecting the electronic device 20 to one or more networks.

[0118] The wireless communication unit 21 may include at least one of a broadcast receiving module, a mobile communication module, a wireless Internet module, a short-range communication module, and a location information module.

[0119] Input unit 22 may include a camera or image input unit for inputting image signals, a microphone or audio input unit for inputting audio signals, and a user input unit (e.g., touch keys or buttons (mechanical keys)) for receiving information from the user. Voice or image data collected by input unit 22 can be analyzed and processed as user control commands.

[0120] The sensing unit 23 may include one or more sensors for detecting at least one of the following: information in the electronic device 20, information about the environment surrounding the electronic device 20, and user information.

[0121] For example, sensing unit 23 may include at least one of the following: proximity sensor, illumination sensor, touch sensor, accelerometer, magnetic sensor, G-sensor, gyroscope sensor, motion sensor, red-green-blue (RGB) sensor, infrared sensor (IR sensor), finger scanning sensor, ultrasonic sensor, optical sensor (e.g., imaging device), microphone, battery gauge, environmental sensor (e.g., barometer, hygrometer, thermometer, radiation detection sensor, thermal detection sensor, or gas detection sensor), and chemical sensor (e.g., electronic nose, healthcare sensor, or biometric sensor). Furthermore, in the electronic device 20 disclosed herein, information detected from at least two of these sensors can be combined and used.

[0122] Output unit 24 can be used to generate outputs related to visual, auditory, or tactile senses, and may include at least one of a display unit, an audio output unit, a tactile module, and an optical output unit. The display unit may form an interlayer structure with the touch sensor or may be integrally formed therewith to realize a touchscreen. The touchscreen can serve as a user input device that provides an input interface between the electronic device 20 for AR and the user, and can also provide an output interface between the electronic device 20 for AR and the user.

[0123] The interface unit 25 serves as a pathway for connecting to various types of external devices of the electronic device 20. Through the interface unit 25, the electronic device 20 can receive VR or AR content from external devices and can perform mutual interaction by exchanging various input signals, sensing signals, and data.

[0124] For example, interface unit 25 may include at least one of a wired / wireless headphone port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device equipped with an identification module, an audio input / output (I / O) port, a video I / O port, and a headphone port.

[0125] Additionally, memory 26 stores data to support various functions of electronic device 20. Memory 26 may store multiple applications (or programs) executed by electronic device 20, data for the operation of electronic device 20, and commands. At least some of these applications can be downloaded from an external server via wireless communication. Furthermore, at least some of these applications may be present on electronic device 20 from the time of manufacture for the basic functions of electronic device 20 (e.g., functions for receiving calls, making calls, receiving messages, and sending messages).

[0126] In addition to operations related to the application, the control unit 27 typically controls the overall operation of the electronic device 20. The control unit 27 can process signals, data, information, etc., input or output through the components described above.

[0127] Furthermore, the control unit 27 can control at least some of the components by executing an application program stored in the memory 26, thereby providing the user with appropriate information or processing functions. In addition, to execute the application program, the control unit 27 can combine and operate at least two of the components included in the electronic device 20.

[0128] Alternatively, the control unit 27 can use a gyroscope sensor, gravity sensor, motion sensor, etc., included in the sensing unit 23 to detect movement of the electronic device 20 or the user. Alternatively, the control unit 27 can use a proximity sensor, illumination sensor, magnetic sensor, infrared sensor, ultrasonic sensor, optical sensor, etc., included in the sensing unit 23 to detect objects approaching the electronic device 20 or the user. Furthermore, the control unit 27 can detect user movement using sensors provided in a controller that operates in conjunction with the electronic device 20.

[0129] In addition, the control unit 27 can use the application stored in the memory 26 to perform the operation (or function) of the electronic device 20.

[0130] The power supply unit 28 can receive external or internal power under the control of the control unit 27 and supply power to each component included in the electronic device 20. The power supply unit 28 may include a battery, which may be provided in an embedded or replaceable form.

[0131] At least some of the above components can cooperate with each other to implement the operation, control, or control method of the electronic device according to the various embodiments described below. Furthermore, the operation, control, or control method of the electronic device can be implemented on the electronic device by executing at least one application program stored in memory 26.

[0132] In the following description, the electronic device described as an example of the present invention will be used in an embodiment of an HMD. However, embodiments of the electronic device according to the present invention may include mobile phones, smartphones, laptop computers, digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation devices, slate PCs, tablet PCs, ultrabooks, and wearable devices. In addition to HMDs, wearable devices may also include smartwatches, contact lenses, VR / AR / MR glasses, etc.

[0133] Figure 3 This is a perspective view of an electronic device for AR according to an embodiment of the present invention.

[0134] like Figure 3 As shown, an electronic device according to an embodiment of the present invention may include a frame 100, a projection device 200, and a display unit 300.

[0135] The electronic device can be provided as an eyeglass-type electronic device (smart glasses). The eyeglass-type electronic device can be configured to be worn on the human head and can include a frame (shell, housing, etc.) 100 for this purpose. The frame 100 can be formed of a flexible material for ease of wearing.

[0136] The frame 100 is supported on the head and provides space for mounting various components. As shown, electronic components such as the projection device 200, user input unit 130, or audio output unit 140 can be mounted on the frame 100. In addition, lenses covering at least one of the left and right eyes can be detachably mounted on the frame 100.

[0137] As shown in the figure, the frame 100 may have the shape of glasses worn on the user's face, but the present invention is not necessarily limited to this. The frame 100 may also have the shape of goggles worn close to the user's face.

[0138] Frame 100 may include a front frame 110 having at least one opening and a Y-direction intersecting the front frame 110 (see [link]). Figure 3 A pair of side frames 120 extending upwards and parallel to each other.

[0139] In frame 100, the length DI in the X direction can be equal to or different from the length LI in the Y direction.

[0140] The projection device 200 is configured to control various electronic components installed in the electronic device. The projection device 200 may also be referred to as an "optical output device," "optical projection device," "light illumination device," "optical device," etc.

[0141] The projection device 200 can generate an image or a video of a continuous image to be displayed to a user. The projection device 200 may include an image source panel for generating the image and a plurality of lenses for diffusing and converging the light generated by the image source panel.

[0142] The projection device 200 can be fixed to one of the two side frames 120. For example, the projection device 200 can be fixed inside or outside either side frame 120, or it can be integrally formed by being embedded inside either side frame 120. Alternatively, the projection device 200 can be fixed to the front frame 110 or disposed separately from the electronic device.

[0143] The display unit 300 can be implemented as an HMD type. An HMD type is a type of display mounted on the head and displaying images directly in front of the user's eyes. When the user wears the electronic device, the display unit 300 can be positioned to correspond to at least one of the left and right eyes, so as to provide an image directly in front of the user's eyes. In this figure, the display unit 300 is positioned at the portion corresponding to the right eye to output an image toward the user's right eye. However, as described above, the invention is not limited thereto, and the display unit 300 can be disposed on both the left and right eyes.

[0144] The display unit 300 allows users to visually perceive the external environment and simultaneously displays images generated by the projection device 200 to the user. For example, the display unit 300 can use a prism to project images onto the display area.

[0145] The display unit 300 can be made transparent, allowing simultaneous viewing of the projected image and the general forward field of view (the range seen by the user through their eyes). For example, the display unit 300 can be semi-transparent and can be formed from optical elements including glass.

[0146] The display unit 300 can be inserted into and secured in an opening included in the front frame 110, or positioned on the rear surface of the opening (i.e., between the opening and the user) and secured to the front frame 110. Although the figure shows an example of the display unit 300 being positioned on the rear surface of the opening and secured to the front frame 110, the display unit 300 can be set and secured in one of a variety of locations on the frame 100.

[0147] like Figure 3 As shown, in the electronic device, when the projection device 200 allows image light to be incident on one side of the display unit 300, the image light is emitted through the display unit 300 to the other side, thereby allowing the user to view the image generated by the projection device 200.

[0148] Therefore, users can view the external environment through the opening in frame 100 and simultaneously view the image generated by projection device 200. In other words, the image output by display unit 300 can overlap with the general field of view. Electronic devices can provide AR for displaying an image by using this display characteristic to overlay virtual images onto a real image or background.

[0149] Furthermore, in addition to this driving method, the external environment and the image generated by the projection device 200 can be provided to the user with a time difference over a short period of time imperceptible to the human. For example, in one frame, the external environment can be provided to the user in one segment, and in another segment, the image from the projection device 200 can be provided to the user. Alternatively, both overlap and time difference can be provided.

[0150] In the following text, the display unit may be referred to as a light guide device. The light guide device according to the embodiment may correspond to the display unit included in the electronic device for AR according to the embodiment.

[0151] In the following text, the first direction can correspond to the Z-axis direction in the figure, and the second direction can correspond to the X-axis direction in the figure. The first direction can also correspond to the optical axis direction. The first and second directions can be perpendicular to each other. The third direction can correspond to the Y-axis direction in the figure. Additionally, the third direction can be perpendicular to the first and second directions.

[0152] Figure 4 This is a schematic diagram of a light guide device according to an embodiment of the present invention.

[0153] Reference Figure 4According to the embodiment, the light guide device 300 may include a first substrate 310, a first input diffraction element 320, a first transmission diffraction element 330, and a first output diffraction element 340. Additionally, the light guide device 300 may include a second substrate 350, a second input diffraction element 360, a second transmission diffraction element 370, and a second output diffraction element 380. Furthermore, the light guide device 300 may include a cover 390.

[0154] The light guide device 300 can change the path of light output from the projection device and incident on the light guide device 300, and then output the light to the outside again. Light can sequentially be incident on the input diffraction element, the substrate, the transmission diffraction element, and the output diffraction element, and then output to the outside again. The direction in which the light is incident on the light guide device 300 can be a third direction. This third direction can be the incident direction of the light or its opposite direction. Alternatively, the third direction can be the optical axis direction.

[0155] The first substrate 310 can serve as a path for transmitted light. The first substrate 310 can transmit first light. A first input diffraction element 320, a first transmission diffraction element 330, and a first output diffraction element 340 can be disposed on the first substrate 310. Light can undergo total internal reflection within the first substrate 310 to travel along the interior of the first substrate 310. The first substrate 310 may include a waveguide. The first input diffraction element 320, the first transmission diffraction element 330, and the first output diffraction element 340 can be disposed on the first substrate 310 spaced apart from each other. The first substrate 310 can be disposed along a second direction. The first substrate 310 can be disposed perpendicular to the optical axis.

[0156] The first substrate 310 may include a first surface S1 and a second surface S2. The first surface S1 may be a surface on which light is incident. The second surface S2 may be a surface from which light exits. The second surface S2 may be a surface spaced apart from the first surface S1. The first surface S1 and the second surface S2 may be surfaces spaced apart from each other in the optical axis direction. The first surface S1 and the second surface S2 may be parallel to each other. The first surface S1 and the second surface S2 may be arranged parallel to each other in a second direction. A first input diffraction element 320, a first transmission diffraction element 330, and a first output diffraction element 340 may be disposed on the first surface S1 or the second surface S2.

[0157] The first input diffraction element 320 can be used as a path for incident light. The first input diffraction element 320 can be disposed on the first substrate 310. Light can be incident from the outside onto the light guide device 300 through the first input diffraction element 320 and can be transmitted through the first substrate 310. The first input diffraction element 320 can change the path of light by diffracting it.

[0158] A portion of the light passing through the first input diffraction element 320 can be diffracted, and a portion can pass through the first input diffraction element 320 without being diffracted. The first input diffraction element 320 can transmit light and separate it into a first diffracted light and a second undiffracted light. The first light can be diffracted such that the path of the light can be changed by a predetermined angle. The second light that is not diffracted by the first input diffraction element 320 can pass through the first input diffraction element 320 and the first substrate 310 to reach the second input diffraction element 360.

[0159] The first transmission diffraction element 330 can be used to change the path of light. The first transmission diffraction element 330 can be disposed on the first substrate 310. The first transmission diffraction element 330 can change the path of light incident through the first input diffraction element 320. The first transmission diffraction element 330 can change the path of light so that the light is directed towards the first output diffraction element 340. The first transmission diffraction element 330 can change the path of light by diffracting light. The first transmission diffraction element 330 can be disposed between the first input diffraction element 320 and the first output diffraction element 340 in the path of light.

[0160] The first output diffraction element 340 can be used as a path for light to exit. The first output diffraction element 340 can be disposed on the first substrate 310. Light can exit through the first output diffraction element 340 to the outside of the light guide device 300. The first output diffraction element 340 can receive light whose path has been changed from the first transmission diffraction element 330, and can cause the received light to exit to the outside. The first output diffraction element 340 can change the path of light and cause light to exit to the outside. The first output diffraction element 340 can change the path of light by diffracting light.

[0161] The second substrate 350 can serve as a path for transmitted light. A second input diffraction element 360, a second transmission diffraction element 370, and a second output diffraction element 380 can be disposed on the second substrate 350. Light can undergo total internal reflection within the second substrate 350 to travel along its interior. The second substrate 350 may include a waveguide. The second input diffraction element 360, the second transmission diffraction element 370, and the second output diffraction element 380 can be disposed on the second substrate 350 spaced apart from each other. The second substrate 350 can be disposed perpendicular to the optical axis.

[0162] The second substrate 350 may be disposed below the first substrate 310. The second substrate 350 may be disposed below the first substrate 310 and may transmit second light that has passed through the first substrate 310. The second substrate 350 may be configured to overlap with the first substrate 310 in the optical axis direction. The second substrate 350 may be spaced apart from the first substrate 310 by a predetermined distance in the optical axis direction.

[0163] The second substrate 350 may include a third surface S3 and a fourth surface S5. The third surface S3 may be a surface on which light is incident. Additionally, the fourth surface S4 may be a surface from which light exits. The fourth surface S4 may be a surface spaced apart from the third surface S3. The third surface S3 and the fourth surface S4 may be surfaces spaced apart from each other in the optical axis direction. The third surface S3 and the fourth surface S4 may be parallel to each other. The third surface S3 and the fourth surface S4 may be arranged parallel to each other in a second direction. A second input diffraction element 360, a second transmission diffraction element 370, and a second output diffraction element 380 may be disposed on either the third surface S3 or the fourth surface S4.

[0164] The second input diffraction element 360 can be used as a path for incident light. The second input diffraction element 360 can be disposed on the second substrate 350. Light can pass through the first input diffraction element 320 and can be incident on the second substrate 350 through the second input diffraction element 360. The second input diffraction element 360 can change the path of light by diffracting it. The second input diffraction element 360 can diffract second light that has already passed through the first input diffraction element 320 and the first substrate 310. The second input diffraction element 360 can be configured to overlap with the first input diffraction element 320 in the optical axis direction.

[0165] The second transmission diffraction element 370 can be used to change the path of light. The second transmission diffraction element 370 can be disposed on the second substrate 350. The second transmission diffraction element 370 can change the path of light incident through the second input diffraction element 360. The second transmission diffraction element 370 can change the path of light so that the light is directed towards the second output diffraction element 380. The second transmission diffraction element 370 can change the path of light by diffracting light. The second transmission diffraction element 370 can be disposed between the second input diffraction element 360 and the second output diffraction element 380 in the light path. The second transmission diffraction element 370 can be configured to overlap with the first transmission diffraction element 330 in the optical axis direction.

[0166] The second output diffraction element 380 can be used as a path for light to exit. The second output diffraction element 380 can be disposed on the second substrate 350. Light can exit through the second output diffraction element 380 to the outside of the light guide device 300. Light exiting through the second output diffraction element 380 can pass through the first substrate 310 to exit to the outside. The second output diffraction element 380 can receive light whose path has been changed from the second transmission diffraction element 370, and can make the received light exit to the outside. The second output diffraction element 380 can change the path of light and make the light exit to the outside. The second output diffraction element 380 can change the path of light by diffracting light. The second output diffraction element 380 can be configured to partially overlap with the first output diffraction element 340 in the optical axis direction.

[0167] The cover 390 can be disposed on the first substrate 310. The cover 390 can be disposed on the first substrate 310 at a position adjacent to the projection device 200. Light irradiated by the projection device 200 can pass through the cover 390 and be incident on the first input diffraction element 320. The cover 390 can be used to protect the interior of the light guide device 300. The cover 390 can be disposed perpendicular to the optical axis.

[0168] Figure 5 This is a schematic diagram of a light guide device according to an embodiment of the present invention. Figure 6 This is an enlarged perspective view of a portion of the frame of a light guide device according to an embodiment of the present invention. Figure 7 This is an enlarged top view of a portion of the frame of the light guide device according to an embodiment of the present invention.

[0169] Figure 5 This is a cross-sectional view of the light guide device 400 viewed from the side. (Refer to...) Figures 5 to 7 The light guide device 400 may include a frame 410. The frame 410 may be configured to surround the cover 420, the first substrate 430, and the second substrate 440 to secure and protect the cover 420, the first substrate 430, and the second substrate 440. The frame 410 may be disposed on a portion of the lower surface and a side surface of each of the cover 420, the first substrate 430, and the second substrate 440. The frame 410 may include plastic or metal.

[0170] The cover 420, the first substrate 430, and the second substrate 440 can be sequentially arranged along the optical direction inside the frame 410. The cover 420 can be located at the uppermost part of the frame 410. The first substrate 430 can be located below the cover 420, and the second substrate 430 can be located below the first substrate 430. The cover 420, the first substrate 430, and the second substrate 440 can be arranged to overlap each other in the optical axis direction.

[0171] The frame 410 may include a first step structure 411 and a second step structure 412. The first step structure 411 and the second step structure 412 may be disposed on the inner surface of the frame 410. The first step structure 411 and the second step structure 412 may support the cover 420, the first substrate 430, and the second substrate 440. The first step structure 411 and the second step structure 412 may be structures that protrude from the inner surface of the frame 410 in a direction perpendicular to the optical axis. The first step structure 411 and the second step structure 412 may have a predetermined height in the optical axis direction. Furthermore, the first step structure 411 and the second step structure 412 may have a predetermined width in a direction perpendicular to the optical axis direction.

[0172] The first step structure 411 can protrude from the inner surface of the frame 410 in an inward direction. The first step structure 411 can protrude a predetermined distance from the inner surface of the frame 410 in a direction perpendicular to the optical axis. A cover 420 can be disposed on the upper surface of the first step structure 411. The cover 420 can partially overlap the first step structure 411 in the optical axis direction. The cover 420 can be fixed by the upper surface of the first step structure 411 and the inner surface of the frame 410. Additionally, the side surface of the first step structure 411 can contact the side surface of the first substrate 430. The first substrate 430 can overlap the first step structure 411 in a direction perpendicular to the optical axis direction. The first step structure 411 can have a predetermined width in the direction perpendicular to the optical axis direction. The width of the first step structure 411 in the direction perpendicular to the optical axis direction can be in the range of 0.4 mm to 0.6 mm. For example, the width of the first step structure 411 in the direction perpendicular to the optical axis direction can be 0.5 mm.

[0173] The height of the first step structure 411 in the optical axis direction can be greater than the thickness of the first substrate 430. Since the height of the first step structure 411 in the optical axis direction is greater than the thickness of the first substrate 430, the first substrate 430 and the cover 420 can be arranged to be spaced apart from each other by a predetermined distance in the optical axis direction. Therefore, the diffraction element of the first substrate 430 can be protected by preventing the first substrate 430 from contacting the cover 420.

[0174] The second step structure 412 can protrude from the side surface of the first step structure 411 in the inward direction along the frame 410. The second step structure 412 can protrude a predetermined distance from the side surface of the first step structure 411 in a direction perpendicular to the optical axis. The first substrate 430 can be disposed on the upper surface of the second step structure 412. The first substrate 430 can partially overlap with the second step structure 412 in the optical axis direction. The first substrate 430 can be fixed by the upper surface of the second step structure 412 and the side surface of the first step structure 411. Furthermore, the side surface of the second step structure 412 can contact the side surface of the second substrate 440. The second substrate 440 can overlap with the second step structure 412 in a direction perpendicular to the optical axis direction. The second step structure 412 can have a predetermined width in the direction perpendicular to the optical axis direction. The width of the second step structure 412 in the direction perpendicular to the optical axis direction can be in the range of 0.4 mm to 0.6 mm. For example, the width of the second step structure 412 in the direction perpendicular to the optical axis direction can be 0.5 mm.

[0175] The height of the second step structure 412 in the optical axis direction can be greater than the thickness of the second substrate 440. Since the height of the second step structure 412 in the optical axis direction is greater than the thickness of the second substrate 440, the second substrate 440 and the first substrate 430 can be arranged to be spaced apart from each other by a predetermined distance in the optical axis direction. Therefore, the diffraction element of the second substrate 440 can be protected by preventing the second substrate 440 from contacting the first substrate 430.

[0176] The width w1 of the cover 420 in the direction perpendicular to the optical axis can be greater than the width w2 of the first substrate 430 in the same direction. Therefore, the area of ​​the cover 420 can be greater than the area of ​​the first substrate 430. Since the width w1 of the cover 420 in the direction perpendicular to the optical axis is greater than the width w2 of the first substrate 430 in the same direction, the cover 420 can be disposed on the upper surface of the first stepped structure 411, and the first substrate 430 can be disposed between the first stepped structures 411.

[0177] The width w2 of the first substrate 430 in the direction perpendicular to the optical axis can be greater than the width w3 of the second substrate 440 in the same direction. Therefore, the area of ​​the first substrate 430 can be greater than the area of ​​the second substrate 440. Since the width w2 of the first substrate 430 in the direction perpendicular to the optical axis is greater than the width w3 of the second substrate 440 in the same direction, the first substrate 430 can be disposed on the upper surface of the second stepped structure 412, and the second substrate 440 can be disposed between the second stepped structures 412.

[0178] The frame 410 may include a first step structure 411 and a second step structure 412, such that the cover 420, the first substrate 430, and the second substrate 440 can be fixedly disposed on the frame 410. Therefore, the cover 420, the first substrate 430, and the second substrate 440 can be arranged and simultaneously assembled onto the frame 410. Consequently, the light guide device 400 can resist external impacts or scratches, thereby improving optical performance, reducing process errors, and enabling rapid and precise process execution.

[0179] Reference Figure 6 and Figure 7 The frame 410 may include a first groove 413 and a second groove 414.

[0180] A first groove 413 may be provided in the first stepped structure 411. The first groove 413 may include a shape formed by cutting a portion of the first stepped structure 411. The first groove 413 may have a predetermined height in the optical axis direction. Additionally, the first groove 413 may have a predetermined width in a second direction perpendicular to the optical axis direction. The second direction may be perpendicular to the optical axis direction and may be parallel to the long axis direction of the frame 410. The first groove 413 may have a shape that is recessed inward from the side surface of the first stepped structure 411. The height of the first groove 413 in the optical axis direction may be equal to the height of the first stepped structure 411 in the optical axis direction. The width a1 of the first groove 413 in the second direction may be equal to the width a1 of the first stepped structure 411 in the second direction.

[0181] The second groove 414 may be disposed in each of the first step structure 411 and the second step structure 412. The second groove 414 may be spaced apart from the first groove 413. The second groove 414 may include a shape formed by cutting a portion of each step structure in the first step structure 411 and the second step structure 412. The second groove 414 may include a first portion 414a that overlaps with the first step structure 411 in the optical axis direction and a second portion 414b that overlaps with the second step structure 412 in the optical axis direction.

[0182] The first portion 414a may include a shape formed by cutting a portion of the first stepped structure 411. The first portion 414a may have a predetermined height in the optical axis direction. Additionally, the first portion 414a may have a predetermined width in a second direction. The first portion 414a may have a shape that is recessed inward from the surface of the first stepped structure 411. The height of the first portion 414a in the optical axis direction may be equal to the height of the first stepped structure 411 in the optical axis direction. The width a2 of the first portion 414a in the second direction may be less than the width a1 of the first stepped structure 411 in the second direction. Furthermore, the width a2 of the first portion 414a in the second direction may be less than the width a1 of the first groove 413 in the second direction. The height of the first portion 414a in the optical axis direction may be equal to the sum of the heights of the first stepped structure 411 and the second stepped structure 412 in the optical axis direction.

[0183] The second portion 414b can pass through the second step structure 412 in the second direction. The second portion 414b can pass through the second step structure 412 in the direction from its side surface to its interior. The height of the second portion 414b in the optical axis direction can be less than the height of the second step structure 412 in the optical axis direction. Furthermore, the second portion 414b can pass through the second step structure 412 in the optical axis direction. When viewed in the optical axis direction, the width a3 of the second portion 414b in the second direction can be less than the width a1 of the first groove 413 in the second direction.

[0184] The frame 410 may include a first groove 413 and a second groove 414, and thus includes a plurality of stepped structures. The space between the frame 410 and the first substrate 430 and the second substrate 440 can be filled with a filler (epoxy resin). The first groove 413 and the second groove 414 facilitate the flow of the filler, thereby allowing the first substrate 430 and the second substrate 440 to be more stably fixed to the frame 410.

[0185] Frame 410 may include an entrance aperture 415. The entrance aperture 415 may be disposed below the first substrate and the second substrate to support the first substrate and the second substrate, and may be configured to overlap with the first input diffraction element and the second input diffraction element, such that light can be incident on the first input diffraction element and the second input diffraction element. The entrance aperture 415 may be located in a plate disposed at the lower end portion of frame 410. The optical axis may pass through the center of the entrance aperture 415 of frame 410 and may be perpendicular to the plate of frame 410.

[0186] Figure 8 This is an enlarged top view of a portion of the frame of a light guide device according to another embodiment of the present invention. Figure 9 This is a top view of the first substrate according to an embodiment of the present invention.

[0187] Reference Figure 8 and Figure 9 The frame 510 may include a first protrusion 511 protruding from the inner surface of the frame 510 in a second direction perpendicular to the optical axis and a second protrusion 512 protruding in a third direction perpendicular to the optical axis and the second direction.

[0188] A first protrusion 511 may protrude from the inner surface of the frame 510 along a second direction. The first protrusion 511 may have a predetermined width in the second direction. Additionally, the first protrusion 511 may have a predetermined width in a third direction. A second protrusion 512 may protrude from the inner surface of the frame 510 along a third direction. The second protrusion 512 may protrude in a direction perpendicular to the first protrusion 511. The second protrusion 512 may have predetermined widths in both the second and third directions. The third direction may be perpendicular to the optical axis direction and the second direction, and may be parallel to the minor axis direction of the frame 510.

[0189] The frame 510 may include an entrance aperture 513. The entrance aperture 513 may be disposed below the first substrate and the second substrate to support the first substrate and the second substrate, and may be configured to overlap with the first input diffraction element and the second input diffraction element, allowing light to be incident on the first input diffraction element and the second input diffraction element. The entrance aperture 513 may be configured to overlap with the first protrusion 511 in a second direction and with the second protrusion 512 in a third direction. Additionally, the entrance aperture 513 may overlap with the first input diffraction element 531 in the optical axis direction.

[0190] The frame 510 may include a first protrusion 511 and a second protrusion 512, such that the cover 520, the first substrate 530 and the second substrate 540 can be arranged and simultaneously fixed and assembled onto the frame 510.

[0191] The light guide device 500 may include a first input diffraction element 531, which is disposed on the first substrate 530 and onto which light is incident. The first input diffraction element 531 may be disposed between a first protrusion 511 and a first output diffraction element 533. The first protrusion 511 may overlap with the center of the first input diffraction element 531 in a second direction. In addition, a second protrusion 512 may overlap with the center of the first input diffraction element 531 in a third direction. The first protrusion 511 and the second protrusion 512 may be configured to overlap with the center of the first input diffraction element 531, such that the center of the first input diffraction element 531 can be arranged on the optical axis, and the first input diffraction element 531 can be arranged while the first substrate 530 can be simultaneously fixed and assembled onto the frame 510.

[0192] The cover 520, the first substrate 530, and the second substrate 540 may each include two grooves. The cover 520 may include a first groove and a second groove (not shown), the first substrate 530 may include a third groove 530a and a fourth groove 530b, and the second substrate 540 may include a fifth groove and a sixth groove (not shown). In this case, each groove may be configured to overlap with a corresponding protrusion of the first protrusion 511 and the second protrusion 512. Multiple grooves may overlap with the first protrusion 511 and the second protrusion 512 in the optical axis direction, such that each protrusion of the first protrusion 511 and the second protrusion 512 can be disposed in a corresponding groove.

[0193] The first and fifth grooves can be configured to overlap with the third groove 530a in the optical axis direction. Additionally, the second and sixth grooves can be configured to overlap with the fourth groove 530b in the optical axis direction. Therefore, the first, third, and fifth grooves can overlap with the first protrusion 511 in the optical axis direction, and the second, fourth, and sixth grooves can overlap with the second protrusion 512 in the optical axis direction.

[0194] Each of the cover 520, the first substrate 530, and the second substrate 540 may include two recesses, such that the cover 520, the first substrate 530, and the second substrate 540 can be secured to the protrusions of the frame 510. Therefore, the center of the first input diffraction element 531 can be arranged on the optical axis, and the first substrate 530 and the second substrate 540 can be simultaneously secured and assembled to the frame 510. Thus, the light guide device 400 can resist external impacts or scratches, thereby improving optical performance, reducing process errors, and enabling fast and precise process execution.

[0195] Although the invention has been described with reference to embodiments, these are merely examples and are not intended to limit the invention. Those skilled in the art will understand that various modifications and applications not illustrated above are possible without departing from the essential characteristics of these embodiments. For example, each component specifically shown in the embodiments can be implemented using modifications. Furthermore, differences related to modifications and applications should be interpreted as including within the scope of the invention as defined in the appended claims.

Claims

1. A light guiding device, comprising: frame; as well as A cover, a first substrate, and a second substrate are sequentially disposed on the frame. The frame includes a first step structure and a second step structure. The cover is disposed on the first step structure, and The first substrate is disposed on the second stepped structure.

2. The optical guide device according to claim 1, wherein, The cover, the first substrate, and the second substrate are arranged to be spaced apart from each other in a first direction. The first stepped structure protrudes from the inner surface of the frame in a direction perpendicular to the first direction, and The second step structure protrudes from the side surface of the first step structure in a direction perpendicular to the first direction.

3. The optical guide device according to claim 2, wherein, The cover overlaps with the first stepped structure in the first direction, and The first substrate overlaps with the first stepped structure in a direction perpendicular to the first direction.

4. The optical guide device according to claim 3, wherein, The first substrate overlaps with the second stepped structure in the first direction, and The second substrate overlaps with the second stepped structure in a direction perpendicular to the first direction.

5. The optical guide device according to claim 1, wherein, The area of ​​the cover is larger than the area of ​​the first substrate, and The area of ​​the first substrate is larger than the area of ​​the second substrate.

6. The optical guide device according to claim 2, wherein, The frame includes a first groove and a second groove spaced apart from the first groove.

7. The optical guide device according to claim 6, wherein, The first groove is disposed in the first step structure, and The second groove is provided in each of the first and second step structures.

8. The light guide device according to claim 7, wherein, The second groove includes: a first portion that overlaps with the first step structure in the first direction and a second portion that overlaps with the second step structure in the first direction.

9. The light guide device according to claim 8, wherein, The second part passes through the second step structure in a direction perpendicular to the first direction.

10. The light guide device according to claim 8, wherein, The second part passes through the second step structure in the first direction.

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