Light guide device and electronic device including same

Abstract

Disclosed in an embodiment is a light guide device, comprising: a frame; and a cover, a first substrate, and a second substrate sequentially disposed on the frame, wherein the frame includes a first stepped structure and a second stepped structure, the cover is disposed on the first stepped structure, and the first substrate is disposed on the second stepped structure.

Description

Light guide device and electronic device including the same

[0001] The embodiment relates to a light guide device and an electronic device including the same.

[0002] Virtual Reality (VR) refers to a specific environment or situation, or the technology itself, that is similar to reality but not real, created using artificial technology such as computers.

[0003] Augmented Reality (AR) is a technology that synthesizes virtual objects or information into the real environment to make them appear as objects that exist in the original environment.

[0004] Mixed reality (MR) or hybrid reality refers to the creation of new environments or information by merging the virtual and real worlds. In particular, it refers to real-time interaction between real and virtual worlds.

[0005] At this time, the created virtual environments and situations stimulate the user's five senses, allowing them to experience spatial and temporal experiences similar to reality, freely moving between reality and imagination. Furthermore, users can not only immerse themselves in these environments, but also interact with the objects embodied within them, using real devices to control and command them.

[0006] Recently, active research has been conducted on the gear and devices used in these fields. However, the need for miniaturization and improved optical performance of these devices is emerging.

[0007] The embodiment provides a light guide device with improved durability and an electronic device including the same.

[0008] In addition, a light guide device having a simplified process and an electronic device including the same are provided.

[0009] In addition, a light guide device capable of reducing errors during the assembly process and an electronic device including the same are provided.

[0010] In addition, a light guide device with improved optical performance and an electronic device including the same are provided.

[0011] The problem to be solved in the embodiment is not limited to this, and it can be said that the purpose or effect that can be understood from the solution or embodiment of the problem described below is also included.

[0012] A light guide device according to an embodiment comprises a frame; and a cover, a first substrate, and a second substrate sequentially arranged on the frame; wherein the frame includes a first step structure and a second step structure, the cover is arranged on the first step structure, and the first substrate can be arranged on the second step structure.

[0013] The cover, the first substrate, and the second substrate are arranged to be spaced apart from each other in a first direction, the first step structure may protrude from an inner surface of the frame in a direction perpendicular to the first direction, and the second step structure may protrude from a side surface of the first step structure in a direction perpendicular to the first direction.

[0014] The above cover may overlap the first step structure in the first direction, and the first substrate may overlap the first step structure in a direction perpendicular to the first direction.

[0015] The first substrate may overlap the second step structure in the first direction, and the second substrate may overlap the second step structure in a direction perpendicular to the first direction.

[0016] The area of ​​the cover may be larger than the area of ​​the first substrate, and the area of ​​the first substrate may be larger than the area of ​​the second substrate.

[0017] The frame may include a first groove and a second groove spaced apart from the first groove.

[0018] The first groove may be arranged in the first step structure, and the second groove may be arranged in the first step structure and the second step structure.

[0019] The second groove may include a first portion overlapping the first step structure in the first direction and a second portion overlapping the second step structure in the first direction.

[0020] The second portion can penetrate the second step structure in a direction perpendicular to the first direction.

[0021] The second portion can penetrate the second step structure in the first direction.

[0022] The width in the second direction perpendicular to the first direction of the first portion is smaller than the width in the second direction of the first step structure, and the second direction may be a direction parallel to the longitudinal direction of the frame.

[0023] The height of the first step structure in the first direction may be greater than the thickness of the first substrate, and the height of the second step structure in the first direction may be greater than the thickness of the second substrate.

[0024] The frame may include a first protrusion protruding from the inner surface in a second direction perpendicular to the first direction and a second protrusion protruding in a third direction perpendicular to the first direction and the second direction, wherein the second direction may be a direction parallel to the long axis direction of the frame, and the third direction may be a direction parallel to the short axis direction of the frame.

[0025] The light guide device according to the embodiment is disposed on the first substrate and includes a first input diffractive element onto which light is incident, and the first protrusion can overlap the center of the first input diffractive element in a direction parallel to the second direction.

[0026] The second protrusion may overlap the center of the first input diffractive element in a direction parallel to the third direction.

[0027] 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.

[0028] 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.

[0029] According to an embodiment, a light guide device with improved durability and an electronic device including the same can be provided.

[0030] In addition, a light guide device with a simplified process and an electronic device including the same can be provided.

[0031] In addition, a light guide device capable of reducing errors in the assembly process and an electronic device including the same can be provided.

[0032] In addition, a light guide device with improved optical performance and an electronic device including the same can be provided.

[0033] The various advantageous and beneficial effects of the present invention are not limited to the above-described contents, and will be more easily understood in the course of explaining specific embodiments of the present invention.

[0034] Figure 1 is a conceptual diagram showing an embodiment of an AI device,

[0035] FIG. 2 is a block diagram showing the configuration of an extended reality electronic device according to an embodiment of the present invention.

[0036] Figure 3 is a perspective view of an augmented reality electronic device according to an embodiment of the present invention;

[0037] Figure 4 is a schematic diagram of a light guide device according to an embodiment of the present invention.

[0038] Figure 5 is a schematic diagram of a light guide device according to an embodiment of the present invention.

[0039] FIG. 6 is an enlarged perspective view of a portion of a frame of a light guide device according to an embodiment of the present invention;

[0040] FIG. 7 is an enlarged top view of a portion of the frame of a light guide device according to an embodiment of the present invention;

[0041] FIG. 8 is an enlarged top view of a portion of a frame of a light guide device according to another embodiment of the present invention;

[0042] Figure 9 is a top view of a first substrate according to an embodiment of the present invention.

[0043] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0044] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0045] In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0046] Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0047] In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and / or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

[0048] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

[0049] These terms are intended only to distinguish one component from another, and are not intended to limit the nature, order, or sequence of the component.

[0050] And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, it may include not only cases where the component is directly connected, coupled or connected to the other component, but also cases where the component is 'connected', 'coupled' or 'connected' by another component between the component and the other component.

[0051] Additionally, when described as being formed or arranged "above or below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below", it can include the meaning of a downward direction as well as an upward direction based on one component.

[0052] Figure 1 is a conceptual diagram illustrating an embodiment of an AI device.

[0053] Referring to FIG. 1, an AI system is connected to a cloud network (10) by at least one of an AI server (16), a robot (11), an autonomous vehicle (12), an XR device (13), a smartphone (14), or an appliance (15). Here, a robot (11), an autonomous vehicle (12), an XR device (13), a smartphone (14), or an appliance (15) to which AI technology is applied may be referred to as an AI device (11 to 15).

[0054] A cloud network (10) may refer to a network that constitutes part of a cloud computing infrastructure or exists within a cloud computing infrastructure. Here, the cloud network (10) may be configured using a 3G network, a 4G or LTE (Long Term Evolution) network, a 5G network, etc.

[0055] That is, each device (11 to 16) constituting the AI ​​system can be connected to each other through a cloud network (10). In particular, each device (11 to 16) can communicate with each other through a base station, but can also communicate with each other directly without going through a base station.

[0056] The AI ​​server (16) may include a server that performs AI processing and a server that performs operations on big data.

[0057] The AI ​​server (16) is connected to at least one of the AI ​​devices constituting the AI ​​system, such as a robot (11), an autonomous vehicle (12), an XR device (13), a smartphone (14), or a home appliance (15), through a cloud network (10), and can assist at least part of the AI ​​processing of the connected AI devices (11 to 15).

[0058] At this time, the AI ​​server (16) can train an artificial neural network according to a machine learning algorithm on behalf of the AI ​​devices (11 to 15), and can directly store the learning model or transmit it to the AI ​​devices (11 to 15).

[0059] At this time, the AI ​​server (16) can receive input data from the AI ​​devices (11 to 15), infer a result value for the received input data using a learning model, and generate a response or control command based on the inferred result value and transmit it to the AI ​​devices (11 to 15).

[0060] Alternatively, the AI ​​device (11 to 15) may infer a result value for input data using a direct learning model and generate a response or control command based on the inferred result value.

[0061] <AI+로봇>

[0062] Robots (11) can be implemented as guide robots, transport robots, cleaning robots, wearable robots, entertainment robots, pet robots, unmanned flying robots, etc. by applying AI technology.

[0063] The robot (11) may include a robot control module for controlling movement, and the robot control module may mean a software module or a chip that implements the same as hardware.

[0064] The robot (11) can obtain status information of the robot (11), detect (recognize) the surrounding environment and objects, generate map data, determine a movement path and driving plan, determine a response to user interaction, or determine an action using sensor information obtained from various types of sensors.

[0065] Here, the robot (11) can use sensor information acquired from at least one sensor among lidar, radar, and camera to determine a movement path and driving plan.

[0066] The robot (11) can perform the above-described operations using a learning model comprised of at least one artificial neural network. For example, the robot (11) can recognize its surroundings and objects using the learning model, and determine operations using the recognized surrounding environment information or object information. Here, the learning model may be learned directly by the robot (11) or by an external device such as an AI server (16).

[0067] At this time, the robot (11) may perform an action by generating a result using a direct learning model, but it may also perform an action by transmitting sensor information to an external device such as an AI server (16) and receiving the result generated accordingly.

[0068] The robot (11) can determine a movement path and a driving plan using at least one of map data, object information detected from sensor information, or object information acquired from an external device, and control a driving unit to drive the robot (11) according to the determined movement path and driving plan.

[0069] Map data may include object identification information for various objects positioned in the space where the robot (11) moves. For example, map data may include object identification information for fixed objects such as walls and doors, as well as movable objects such as flower pots and desks. Furthermore, object identification information may include name, type, distance, location, etc.

[0070] Additionally, the robot (11) can perform actions or drive by controlling the driving unit based on the user's control / interaction. At this time, the robot (11) can acquire intention information regarding the interaction based on the user's actions or voice utterances, and determine a response based on the acquired intention information to perform the action.

[0071] <AI+자율주행>

[0072] Autonomous vehicles (12) can be implemented as mobile robots, vehicles, unmanned aerial vehicles, etc. by applying AI technology.

[0073] An autonomous vehicle (12) may include an autonomous driving control module for controlling autonomous driving functions. The autonomous driving control module may refer to a software module or a chip implementing the same as hardware. The autonomous driving control module may be included internally as a component of the autonomous vehicle (12), but may also be configured as separate hardware and connected to the exterior of the autonomous vehicle (12).

[0074] An autonomous vehicle (12) can obtain status information of the autonomous vehicle (12), detect (recognize) the surrounding environment and objects, generate map data, determine a movement path and driving plan, or determine an action by using sensor information obtained from various types of sensors.

[0075] Here, the autonomous vehicle (12) can use sensor information acquired from at least one sensor among lidar, radar, and camera, similar to the robot (11), to determine the movement path and driving plan.

[0076] In particular, an autonomous vehicle (12) can recognize an environment or object in an area where the field of vision is obscured or an area beyond a certain distance by receiving sensor information from external devices, or can receive information recognized directly from external devices.

[0077] An autonomous vehicle (12) can perform the above-described operations using a learning model comprised of at least one artificial neural network. For example, the autonomous vehicle (12) can recognize its surroundings and objects using the learning model, and determine a driving route using the recognized surrounding environment information or object information. Here, the learning model may be learned directly by the autonomous vehicle (12) or by an external device such as an AI server (16).

[0078] At this time, the autonomous vehicle (12) may perform an action by generating a result using a direct learning model, but may also perform an action by transmitting sensor information to an external device such as an AI server (16) and receiving the result generated accordingly.

[0079] An autonomous vehicle (12) can determine a movement path and a driving plan using at least one of map data, object information detected from sensor information, or object information acquired from an external device, and control a driving unit to drive the autonomous vehicle (12) according to the determined movement path and driving plan.

[0080] Map data may include object identification information for various objects located in the space (e.g., road) where the autonomous vehicle (12) travels. For example, map data may include object identification information for fixed objects such as streetlights, rocks, and buildings, as well as movable objects such as vehicles and pedestrians. Furthermore, object identification information may include name, type, distance, location, and the like.

[0081] Additionally, the autonomous vehicle (12) can perform actions or drive by controlling the driving unit based on the user's control / interaction. At this time, the autonomous vehicle (12) can acquire intention information regarding the interaction based on the user's actions or voice utterances, and determine a response based on the acquired intention information to perform the action.

[0082] <AI+XR>

[0083] The XR device (13) can be implemented as an HMD (Head-Mount Display), a HUD (Head-Up Display) equipped in a vehicle, a television, a mobile phone, a smart phone, a computer, a wearable device, a home appliance, digital signage, a vehicle, a fixed robot, or a mobile robot by applying AI technology.

[0084] The XR device (13) can obtain information about the surrounding space or real objects by analyzing 3D point cloud data or image data acquired through various sensors or from an external device to generate location data and attribute data for 3D points, and can render and output an XR object to be output. For example, the XR device (13) can output an XR object including additional information about a recognized object in correspondence with the recognized object.

[0085] The XR device (13) can perform the above-described operations using a learning model composed of at least one artificial neural network. For example, the XR device (13) can recognize a real-world object from 3D point cloud data or image data using the learning model, and provide information corresponding to the recognized real-world object. Here, the learning model may be learned directly in the XR device (13) or learned from an external device such as an AI server (16).

[0086] At this time, the XR device (13) may perform an action by generating a result using a direct learning model, but may also perform an action by transmitting sensor information to an external device such as an AI server (16) and receiving the result generated accordingly.

[0087] <AI+로봇+자율주행>

[0088] Robots (11) can be implemented as guide robots, transport robots, cleaning robots, wearable robots, entertainment robots, pet robots, unmanned flying robots, etc. by applying AI technology and autonomous driving technology.

[0089] A robot (11) to which AI technology and autonomous driving technology are applied may refer to a robot itself with autonomous driving functions, or a robot (11) that interacts with an autonomous vehicle (12).

[0090] A robot (11) with autonomous driving function can be a general term for devices that move on their own along a given path without user control or move by determining the path on their own.

[0091] A robot (11) and a self-driving vehicle (12) with autonomous driving capabilities may use a common sensing method to determine one or more of a movement path or a driving plan. For example, a robot (11) and a self-driving vehicle (12) with autonomous driving capabilities may use information sensed through lidar, radar, and cameras to determine one or more of a movement path or a driving plan.

[0092] A robot (11) interacting with an autonomous vehicle (12) may exist separately from the autonomous vehicle (12), and may be linked to autonomous driving functions inside or outside the autonomous vehicle (12), or may perform actions linked to a user riding in the autonomous vehicle (12).

[0093] At this time, the robot (11) interacting with the autonomous vehicle (12) can control or assist the autonomous driving function of the autonomous vehicle (12) by acquiring sensor information on behalf of the autonomous vehicle (12) and providing it to the autonomous vehicle (12), or by acquiring sensor information and generating surrounding environment information or object information and providing it to the autonomous vehicle (12).

[0094] Alternatively, a robot (11) interacting with an autonomous vehicle (12) may monitor a user riding in the autonomous vehicle (12) or control the functions of the autonomous vehicle (12) through interaction with the user. For example, if the robot (11) determines that the driver is drowsy, it may activate the autonomous driving function of the autonomous vehicle (12) or assist in controlling the driving unit of the autonomous vehicle (12). Here, the functions of the autonomous vehicle (12) controlled by the robot (11) may include not only the autonomous driving function, but also functions provided by a navigation system or audio system installed inside the autonomous vehicle (12).

[0095] Alternatively, a robot (11) interacting with an autonomous vehicle (12) may provide information to the autonomous vehicle (12) or assist functions from outside the autonomous vehicle (12). For example, the robot (11) may provide traffic information, including signal information, to the autonomous vehicle (12), such as a smart traffic light, or may interact with the autonomous vehicle (12) to automatically connect an electric charger to a charging port, such as an automatic electric charger for an electric vehicle.

[0096] <AI+로봇+XR>

[0097] Robots (11) can be implemented as guide robots, transport robots, cleaning robots, wearable robots, entertainment robots, pet robots, unmanned flying robots, drones, etc. by applying AI technology and XR technology.

[0098] A robot (11) to which XR technology is applied may refer to a robot that is the subject of control / interaction within an XR image. In this case, the robot (11) is distinct from the XR device (13) and can be linked with each other.

[0099] When a robot (11) that is the target of control / interaction within an XR image obtains sensor information from sensors including a camera, 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. In addition, the robot (11) can operate based on a control signal input through the XR device (13) or a user's interaction.

[0100] For example, a user can check an XR image corresponding to the viewpoint of a remotely connected robot (11) through an external device such as an XR device (13), and through interaction, adjust the autonomous driving path of the robot (11), control the operation or driving, or check information on surrounding objects.

[0101] <AI+자율주행+XR>

[0102] Autonomous vehicles (12) can be implemented as mobile robots, vehicles, unmanned aerial vehicles, etc. by applying AI technology and XR technology.

[0103] An autonomous vehicle (12) to which XR technology is applied may refer to an autonomous vehicle equipped with a means for providing XR images, an autonomous vehicle that is the subject of control / interaction within an XR image, etc. In particular, an autonomous vehicle (12) that is the subject of control / interaction within an XR image is distinct from an XR device (13) and can be linked with each other.

[0104] An autonomous vehicle (12) equipped with a means for providing XR images can acquire sensor information from sensors including cameras and output XR images generated based on the acquired sensor information. For example, the autonomous vehicle (12) can be equipped with a HUD to output XR images, thereby providing passengers with XR objects corresponding to real objects or objects on the screen.

[0105] At this time, when the XR object is output to the HUD, at least a part of the XR object may be output so as to overlap with an actual object toward which the passenger's gaze is directed. On the other hand, when the XR object is output to a display provided inside the autonomous vehicle (12), at least a part of the XR object may be output so as to overlap with an object on the screen. For example, the autonomous vehicle (12) may output XR objects corresponding to objects such as a road, another vehicle, a traffic light, a traffic sign, a two-wheeled vehicle, a pedestrian, a building, etc.

[0106] When an autonomous vehicle (12) that is the target of control / interaction within an XR image acquires sensor information from sensors including a camera, the autonomous vehicle (12) or the XR device (13) generates an XR image based on the sensor information, and the XR device (13) can output the generated XR image. In addition, the autonomous vehicle (12) can operate based on a control signal input through an external device such as the XR device (13) or a user's interaction.

[0107] [Augmented Reality Technology]

[0108] Extended Reality (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 CG images, AR technology provides virtually created CG images on top of images of real objects, and MR technology is a computer graphics technology that provides virtual objects mixed and combined in the real world.

[0109] MR technology is similar to AR in that it presents both real and virtual objects simultaneously. However, while AR uses virtual objects to complement real objects, MR uses virtual and real objects on an equal footing.

[0110] XR technology can be applied to HMD (Head-Mount Display), HUD (Head-Up Display), mobile phones, tablet PCs, laptops, desktops, TVs, digital signage, etc., and devices to which XR technology is applied can be called XR devices.

[0111] Below, an electronic device providing augmented reality according to an embodiment of the present invention will be described. In particular, a projector applicable to augmented reality and an electronic device including the same will be described in detail.

[0112] Figure 2 is a block diagram showing the configuration of an extended reality electronic device (20) according to an embodiment of the present invention.

[0113] Referring to FIG. 2, the extended reality electronic device (20) 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). The components illustrated in FIG. 2 are not essential for implementing the electronic device (20), and thus, the electronic device (20) described in this specification may have more or fewer components than the components listed above.

[0114] More specifically, among the above components, the wireless communication unit (21) may include one or more modules that enable 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. In addition, the wireless communication unit (21) may include one or more modules that connect the electronic device (20) to one or more networks.

[0115] This wireless communication unit (21) may include at least one of a broadcast reception module, a mobile communication module, a wireless Internet module, a short-range communication module, and a location information module.

[0116] The input unit (22) may include a camera or video input unit for inputting video signals, a microphone or audio input unit for inputting audio signals, and a user input unit (e.g., a touch key, a mechanical key, etc.) for receiving information from a user. Voice data or image data collected from the input unit (22) may be analyzed and processed into a user's control command.

[0117] The sensing unit (23) may include one or more sensors for sensing at least one of information within the electronic device (20), information about the surrounding environment surrounding the electronic device (20), and user information.

[0118] For example, the sensing unit (23) may include at least one of a proximity sensor, an illumination sensor, a touch sensor, an acceleration sensor, a magnetic sensor, a G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared sensor (IR sensor), a fingerprint recognition sensor, an ultrasonic sensor, an optical sensor (e.g., a photographing device), a microphone, a battery gauge, an environmental sensor (e.g., a barometer, a hygrometer, a thermometer, a radiation detection sensor, a heat detection sensor, a gas detection sensor, etc.), and a chemical sensor (e.g., an electronic nose, a healthcare sensor, a biometric recognition sensor, etc.). Meanwhile, the electronic device (20) disclosed in the present specification may utilize information sensed by at least two or more of these sensors in combination.

[0119] The output unit (24) is for generating output related to visual, auditory, or tactile sensations, and may include at least one of a display unit, an audio output unit, a haptic module, and an optical output unit. The display unit may be formed as a touch screen by forming a mutual layer structure with a touch sensor or by forming an integral structure. This touch screen may function as a user input means that provides an input interface between the augmented reality electronic device (20) and the user, and at the same time, may provide an output interface between the augmented reality electronic device (20) and the user.

[0120] The interface unit (25) serves as a passageway for various types of external devices connected to the electronic device (20). Through the interface unit (25), the electronic device (20) can receive virtual reality or augmented reality content from the external device, and can perform mutual interaction by exchanging various input signals, sensing signals, and data.

[0121] For example, the interface unit (25) may include at least one of a wired / wireless headset 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 I / O (Input / Output) port, a video I / O (Input / Output) port, and an earphone port.

[0122] In addition, the memory (26) stores data that supports various functions of the electronic device (20). The memory (26) can store a plurality of application programs (or applications) that run on the electronic device (20), data for the operation of the electronic device (20), and commands. At least some of these application programs can be downloaded from an external server via wireless communication. In addition, at least some of these application programs can exist on the electronic device (20) from the time of shipment for the basic functions of the electronic device (20) (e.g., call receiving and making functions, message receiving and making functions).

[0123] In addition to operations related to the application program, 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 discussed above.

[0124] In addition, the control unit (27) can control at least some of the components by driving an application program stored in the memory (26) to provide appropriate information to the user or process a function. Furthermore, the control unit (27) can operate at least two or more of the components included in the electronic device (20) in combination with each other to drive the application program.

[0125] In addition, the control unit (27) can detect the movement of the electronic device (20) or the user by using a gyroscope sensor, gravity sensor, motion sensor, etc. included in the sensing unit (23). Alternatively, the control unit (27) can detect an object approaching the electronic device (20) or the user by using a proximity sensor, a light sensor, a magnetic sensor, an infrared sensor, an ultrasonic sensor, a light sensor, etc. included in the sensing unit (23). In addition, the control unit (27) can also detect the movement of the user by using sensors provided in a controller that operates in conjunction with the electronic device (20).

[0126] Additionally, the control unit (27) can perform operations (or functions) of the electronic device (20) using an application program stored in the memory (26).

[0127] The power supply unit (28) receives external power or internal power under the control of the control unit (27) and supplies power to each component included in the electronic device (20). The power supply unit (28) includes a battery, and the battery may be provided in a built-in or replaceable form.

[0128] At least some of the above components may cooperate with each other to implement the operation, control, or control method of the electronic device according to various embodiments described below. In addition, the operation, control, or control method of the electronic device may be implemented on the electronic device by driving at least one application program stored in the memory (26).

[0129] Hereinafter, an electronic device described as an example of the present invention will be described based on an embodiment applied to an HMD (Head Mounted Display). However, embodiments of the electronic device according to the present invention may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (personal digital assistant), a PMP (portable multimedia player), a navigation device, a slate PC, a tablet PC, an ultrabook, and a wearable device. In addition to an HMD, the wearable device may include a smart watch, a contact lens, VR / AR / MR Glass, and the like.

[0130] FIG. 3 is a perspective view of an augmented reality electronic device according to an embodiment of the present invention.

[0131] As illustrated in FIG. 3, an electronic device according to an embodiment of the present invention may include a frame (100), a projector device (200), and a display unit (300).

[0132] The electronic device may be provided as a glass type (smart glass). The glass type electronic device is configured to be worn on the head of the human body and may include a frame (case, housing, etc.) (100) for this purpose. The frame (100) may be formed of a flexible material to facilitate wearing.

[0133] The frame (100) is supported by the head and provides a space for mounting various components. As illustrated, electronic components such as a projector device (200), a user input unit (130), or an audio output unit (140) may be mounted on the frame (100). In addition, a lens covering at least one of the left and right eyes may be detachably mounted on the frame (100).

[0134] The frame (100) may have a shape of glasses worn on the face of the user's body as shown in the drawing, but is not necessarily limited thereto, and may also have a shape of goggles or the like worn in close contact with the user's face.

[0135] Such a frame (100) may include a front frame (110) having at least one opening, and a pair of side frames (120) extending in the y direction (in FIG. 3) intersecting the front frame (110) and being parallel to each other.

[0136] The frame (100) may have the same or different length (DI) in the x direction and length (LI) in the y direction.

[0137] The project device (200) is provided to control various electronic components provided in an electronic device. The project device (200) may be used interchangeably with 'optical output device', 'optical projector device', 'light irradiation device', 'optical device', etc.

[0138] The projector device (200) can generate an image or a video of a sequence of images that are displayed to the user. The projector device (200) can 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.

[0139] The project device (200) may be fixed to one of the two side frames (120). For example, the project device (200) may be fixed to the inside or outside of one of the side frames (120), or may be integrally formed by being built into the inside of one of the side frames (120). Alternatively, the project device (200) may be fixed to the front frame (110) or may be provided separately from the electronic device.

[0140] The display unit (300) may be implemented in the form of a head-mounted display (HMD). The HMD form refers to a display method that is mounted on the head and directly displays an image in front of the user's eyes. When the user wears the electronic device, the display unit (300) may be positioned to correspond to at least one of the left and right eyes so that the image can be directly displayed in front of the user's eyes. In this drawing, the display unit (300) is positioned in a portion corresponding to the right eye so as to output an image toward the user's right eye. However, as described above, the present invention is not limited thereto and may be positioned for both the left and right eyes.

[0141] The display unit (300) can allow the user to visually perceive the external environment while simultaneously displaying images generated by the projector device (200). For example, the display unit (300) can project images onto the display area using a prism.

[0142] The display unit (300) may be formed to be translucent so that the projected image and the general field of view in front (the range that the user sees through his eyes) can be viewed simultaneously. For example, the display unit (300) may be translucent and formed of an optical member including glass.

[0143] And the display unit (300) can be inserted into and fixed to an opening included in the front frame (110), or can be positioned on the back surface of the opening (i.e., between the opening and the user) and fixed to the front frame (110). In the drawing, an example in which the display unit (300) is positioned on the back surface of the opening and fixed to the front frame (110) is shown, but the display unit (300) can be positioned and fixed to various positions of the frame (100).

[0144] As illustrated in FIG. 3, when the electronic device projects image light from the projector device (200) onto one side of the display unit (300), the image light is emitted to the other side through the display unit (300), thereby allowing the user to see the image generated from the projector device (200).

[0145] Accordingly, the user can view the external environment through the opening of the frame (100) and simultaneously view the image generated by the projector device (200). That is, the image output through the display unit (300) can be seen to overlap with the general field of view. By utilizing these display characteristics, electronic devices can provide augmented reality (AR) that superimposes a virtual image on a real image or background and shows it as a single image.

[0146] Furthermore, in addition to these operations, images generated by the external environment and the projector device (200) may be presented to the user with a time difference for a short period of time that is not perceptible to the user. For example, within a single frame, the external environment may be presented to the user during one section, while images from the projector device (200) may be presented to the user during another section. Alternatively, both overlap and time difference may be provided.

[0147] The following display unit may be expressed as a light guide device. The light guide device according to the embodiment may correspond to the display unit included in the augmented reality electronic device according to the above embodiment.

[0148] Hereinafter, the first direction may correspond to the Z-axis direction in the drawing, and the second direction may correspond to the X-axis direction in the drawing. The first direction may correspond to the optical axis direction. The first direction and the second direction may be directions perpendicular to each other. The third direction may correspond to the Y-axis direction in the drawing. In addition, the third direction may be a direction perpendicular to the first direction and the second direction.

[0149] Figure 4 is a schematic diagram of a light guide device according to an embodiment of the present invention.

[0150] Referring to FIG. 4, the light guide device (300) according to the embodiment may include a first substrate (310), a first input diffractive element (320), a first transmission diffractive element (330), and a first output diffractive element (340). In addition, the light guide device (300) may include a second substrate (350), a second input diffractive element (360), a second transmission diffractive element (370), and a second output diffractive element (380). In addition, the light guide device (300) may include a cover (390).

[0151] The light guide device (300) can change the path of light that is output from the projector device and then output the light to the outside again. The light can sequentially enter the input diffraction element, the substrate, the transmission diffraction element, and the output diffraction element and be output to the outside again. The direction in which the light is incident on the light guide device (300) can be a third direction. The third direction can mean the direction in which the light is incident or the opposite direction. In addition, the third direction can mean the direction of the optical axis.

[0152] The first substrate (310) can serve as a path for transmitting light. The first substrate (310) can transmit the first light. A first input diffraction element (320), a first transmission diffraction element (330), and a first output diffraction element (340) can be arranged on the first substrate (310). The light can be totally reflected inside the first substrate (310) and travel along the inside of the first substrate (310). The first substrate (310) can include a waveguide. The first input diffraction element (320), the first transmission diffraction element (330), and the first output diffraction element (340) can be arranged to be spaced apart from each other on the first substrate (310). The first substrate (310) can be arranged in the second direction. The first substrate (310) can be arranged perpendicular to the optical axis direction.

[0153] The first substrate (310) may include a first surface (S1) and a second surface (S2). The first surface (S1) may be a surface onto which light enters. In addition, 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 in the direction of the optical axis. 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 along the second direction. A first input diffraction element (320), a first transmission diffraction element (330), and a first output diffraction element (340) may be arranged on the first surface (S1) or the second surface (S2).

[0154] The first input diffraction element (320) can serve as a path through which light is incident. The first input diffraction element (320) can be placed 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 transmitted through the first substrate (310). The first input diffraction element (320) can change the path of light by diffracting the light.

[0155] Light passing through the first input diffraction element (320) may be partially diffracted and partially passed through without being diffracted. The first input diffraction element (320) may allow light to pass through and separate the light into first light that is diffracted and second light that is not diffracted. The first light may be diffracted so that its path may change by a certain angle. The second light that is not diffracted by the first input diffraction element (320) may pass through the first input diffraction element (320) and the first substrate (310) to reach the second input diffraction element (360).

[0156] The first transmission diffraction element (330) can serve to change the path of light. The first transmission diffraction element (330) can be arranged 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 it is directed toward the first output diffraction element (340). The first transmission diffraction element (330) can change the path of light by diffracting the light. The first transmission diffraction element (330) can be arranged between the first input diffraction element (320) and the first output diffraction element (340) on the path of light.

[0157] The first exit diffraction element (340) can serve as a path through which light is emitted. The first exit diffraction element (340) can be disposed on the first substrate (310). Light can be emitted to the outside of the light guide device (300) through the first exit diffraction element (340). The first exit diffraction element (340) can receive light whose path has been changed from the first transmission diffraction element (330) and emitted it to the outside. The first exit diffraction element (340) can change the path of the light and emitted it to the outside. The first exit diffraction element (340) can change the path of the light by diffracting the light.

[0158] The second substrate (350) can serve as a path for transmitting light. A second input diffraction element (360), a second transmission diffraction element (370), and a second output diffraction element (380) can be arranged on the second substrate (350). The light can be totally reflected inside the second substrate (350) and travel along the inside of the second substrate (350). The second substrate (350) can include a waveguide. The second input diffraction element (360), the second transmission diffraction element (370), and the second output diffraction element (380) can be arranged spaced apart from each other on the second substrate (350). The second substrate (350) can be arranged perpendicular to the optical axis direction.

[0159] The second substrate (350) may be placed at the bottom of the first substrate (310). The second substrate (350) may be placed at the bottom of the first substrate (310) to transmit the second light that has passed through the first substrate (310). The second substrate (350) may be placed to overlap the first substrate (310) in the optical axis direction. The second substrate (350) may be spaced apart from the first substrate (310) by a certain distance in the optical axis direction.

[0160] The second substrate (350) may include a third surface (S3) and a fourth surface (S5). The third surface (S3) may be a surface onto which light enters. In addition, 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 in the direction of the optical axis. 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 along the second direction. A second input diffraction element (360), a second transmission diffraction element (370), and a second output diffraction element (380) may be arranged on the third surface (S3) or the fourth surface (S4).

[0161] The second input diffraction element (360) can serve as a path through which light is incident. The second input diffraction element (360) can be arranged on the second substrate (350). The light can pass through the first input diffraction element (320) and 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 the light by diffracting the light. The second input diffraction element (360) can diffract the second light that has passed through the first input diffraction element (320) and the first substrate (310). The second input diffraction element (360) can be arranged to overlap with the first input diffraction element (320) in the optical axis direction.

[0162] The second transmission diffraction element (370) can serve to change the path of light. The second transmission diffraction element (370) can be arranged 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 it is directed toward the second output diffraction element (380). The second transmission diffraction element (370) can change the path of light by diffracting the light. The second transmission diffraction element (370) can be arranged between the second input diffraction element (360) and the second output diffraction element (380) on the path of light. The second transmission diffraction element (370) can be arranged to overlap the first transmission diffraction element (330) in the optical axis direction.

[0163] The second exit diffraction element (380) can serve as a path through which light is emitted. The second exit diffraction element (380) can be disposed on the second substrate (350). Light can be emitted to the outside of the light guide device (300) through the second exit diffraction element (380). Light emitted through the second exit diffraction element (380) can pass through the first substrate (310) and be emitted to the outside. The second exit diffraction element (380) can receive light whose path has been changed from the second transmission diffraction element (370) and emitted it to the outside. The second exit diffraction element (380) can change the path of the light and emitted it to the outside. The second exit diffraction element (380) can change the path of the light by diffracting the light. The second diffraction element (380) may be arranged to partially overlap with the first diffraction element (340) in the optical axis direction.

[0164] The cover (390) may be placed on the first substrate (310). The cover (390) may be placed on the first substrate (310) at a position adjacent to the projector device (200). The light irradiated by the projector device (200) may pass through the cover (390) and enter the first input diffraction element (320). The cover (390) may serve to protect the interior of the light guide device (300). The cover (390) may be placed perpendicular to the optical axis direction.

[0165] FIG. 5 is a schematic diagram of a light guide device according to an embodiment of the present invention, FIG. 6 is an enlarged perspective view of a portion of a frame of a light guide device according to an embodiment of the present invention, and FIG. 7 is an enlarged top view of a portion of a frame of a light guide device according to an embodiment of the present invention.

[0166] FIG. 5 may be a cross-sectional view of the light guide device (400) viewed from the side. Referring to FIGS. 5 to 7, the light guide device (400) may include a frame (410). The frame (410) may be arranged to surround the cover (420), the first substrate (430), and the second substrate (440), thereby fixing and protecting the cover (420), the first substrate (430), and the second substrate (440). The frame (410) may be arranged on a portion of the side surface and the lower surface of the cover (420), the first substrate (430), and the second substrate (440). The frame (410) may include plastic or metal.

[0167] The cover (420), the first substrate (430), and the second substrate (440) may be sequentially arranged in the optical axis direction on the inside of the frame (410). The cover (420) may be arranged at the uppermost part of the frame (410). The first substrate (430) may be arranged at the lower part of the cover (420), and the second substrate (430) may be arranged at the lower part of the first substrate (430). The cover (420), the first substrate (430), and the second substrate (440) may be arranged to overlap in the optical axis direction.

[0168] 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 an 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 in a direction perpendicular to the optical axis direction from the inner surface of the frame (410). The first step structure (411) and the second step structure (412) may have a constant height in the optical axis direction. In addition, the first step structure (411) and the second step structure (412) may have a constant width in a direction perpendicular to the optical axis direction.

[0169] The first step structure (411) may protrude inwardly from the inner surface of the frame (410). The first step structure (411) may protrude a certain distance from the inner surface of the frame (410) in a direction perpendicular to the optical axis direction. A cover (420) may be arranged on the upper surface of the first step structure (411). The cover (420) may partially overlap with the first step structure (411) in the optical axis direction. The cover (420) may be fixed by the upper surface of the first step structure (411) and the inner surface of the frame (410). In addition, the side surface of the first step structure (411) may be in contact with the side surface of the first substrate (430). The first substrate (430) may overlap with the first step structure (411) in a direction perpendicular to the optical axis direction. The first step structure (411) may have a certain width in a direction perpendicular to the optical axis direction. The width in the direction perpendicular to the optical axis direction of the first step structure (411) may be 0.4 mm to 0.6 mm. For example, the width in the direction perpendicular to the optical axis direction of the first step structure (411) may be 0.5 mm.

[0170] The height in the optical axis direction of the first step structure (411) may be greater than the thickness of the first substrate (430). By making the height in the optical axis direction of the first step structure (411) greater than the thickness of the first substrate (430), the first substrate (430) and the cover (420) may be arranged at a certain distance apart from each other in the optical axis direction. Accordingly, the first substrate (430) and the cover (420) may not come into contact with each other, thereby protecting the diffraction element of the first substrate (430).

[0171] The second step structure (412) may protrude inwardly of the frame (410) from the side surface of the first step structure (411). The second step structure (412) may protrude a certain distance in a direction perpendicular to the optical axis direction from the side surface of the first step structure (411). A first substrate (430) may be disposed on the upper surface of the second step structure (412). The first substrate (430) may partially overlap the second step structure (412) in the optical axis direction. The first substrate (430) may be fixed by the upper surface of the second step structure (412) and the side surface of the first step structure (411). In addition, the side surface of the second step structure (412) may be in contact with the side surface of the second substrate (440). The second substrate (440) may overlap the second step structure (412) in a direction perpendicular to the optical axis direction. The second step structure (412) may have a certain width in a direction perpendicular to the optical axis direction. The width in the direction perpendicular to the optical axis direction of the second step structure (412) may be 0.4 mm to 0.6 mm. For example, the width in the direction perpendicular to the optical axis direction of the second step structure (412) may be 0.5 mm.

[0172] The height in the optical axis direction of the second step structure (412) may be greater than the thickness of the second substrate (440). By making the height in the optical axis direction of the second step structure (412) greater than the thickness of the second substrate (440), the second substrate (440) and the first substrate (430) may be arranged to be spaced apart from each other by a certain distance in the optical axis direction. Accordingly, the second substrate (440) and the first substrate (430) may not come into contact with each other, thereby protecting the diffraction element of the second substrate (440).

[0173] The width (w1) in the direction perpendicular to the optical axis direction of the cover (420) may be greater than the width (w2) in the direction perpendicular to the optical axis direction of the first substrate (430). Accordingly, the area of ​​the cover (420) may be greater than the area of ​​the first substrate (430). The width (w1) in the direction perpendicular to the optical axis direction of the cover (420) may be greater than the width (w2) in the direction perpendicular to the optical axis direction of the first substrate (430), so that the cover (420) may be disposed on the upper surface of the first step structure (411), and the first substrate (430) may be disposed between the first step structures (411).

[0174] The width (w2) in the direction perpendicular to the optical axis direction of the first substrate (430) may be greater than the width (w3) in the direction perpendicular to the optical axis direction of the second substrate (440). Accordingly, the area of ​​the first substrate (430) may be greater than the area of ​​the second substrate (440). The width (w2) in the direction perpendicular to the optical axis direction of the first substrate (430) may be greater than the width (w3) in the direction perpendicular to the optical axis direction of the second substrate (440), so that the first substrate (430) may be disposed on the upper surface of the second step structure (412), and the second substrate (440) may be disposed between the second step structures (412).

[0175] The frame (410) includes a first step structure (411) and a second step structure (412), so that a cover (420), a first substrate (430), and a second substrate (440) can be fixedly placed on the frame (410), and accordingly, the cover (420), the first substrate (430), and the second substrate (440) can be aligned and assembled on the frame (410) simultaneously. Accordingly, the light guide device (400) is resistant to external impacts or scratches, so that optical performance can be improved, errors can be reduced during the process, and the process can be performed quickly and precisely.

[0176] Referring to FIGS. 6 and 7, the frame (410) may include a first groove (413) and a second groove (414).

[0177] The first groove (413) may be arranged in the first step structure (411). The first groove (413) may include a shape in which a portion of the first step structure (411) is cut off. The first groove (413) may have a predetermined height in the optical axis direction. In addition, the first groove (413) may have a predetermined width in a second direction perpendicular to the optical axis direction. The second direction may be a direction perpendicular to the optical axis direction and may be a direction 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 step structure (411). The height of the first groove (413) in the optical axis direction may be the same as the height of the first step structure (411) in the optical axis direction. The width (a1) of the first groove (413) in the second direction may be the same as the width (a1) of the first step structure (411) in the second direction.

[0178] The second groove (414) may be arranged in the first step structure (411) and the second step structure (412). The second groove (414) may be arranged spaced apart from the first groove (413). The second groove (414) may include a form in which a portion of the first step structure (411) and the second step structure (412) is cut off. The second groove (414) may include a first portion (414a) that overlaps the first step structure (411) in the optical axis direction and a second portion (414b) that overlaps the second step structure (412) in the optical axis direction.

[0179] The first portion (414a) may include a form in which a portion of the first step structure (411) is cut off. The first portion (414a) may have a predetermined height in the optical axis direction. In addition, the first portion (414a) may have a predetermined width in the second direction. The first portion (414a) may have a form that is recessed inward from the side surface of the first step structure (411). The height of the first portion (414a) in the optical axis direction may be the same as the height of the first step structure (411) in the optical axis direction. The width (a2) of the first portion (414a) in the second direction may be smaller than the width (a1) of the first groove (413) in the second direction. The height in the optical axis direction of the first part (414a) may be equal to the sum of the height in the optical axis direction of the first step structure (411) and the height in the optical axis direction of the second step structure (412).

[0180] The second portion (414b) can penetrate the second step structure (412) in the second direction. The second portion (414b) can penetrate the second step structure (412) inwardly from the side of the second step structure (412). The height of the second portion (414b) in the optical axis direction can be smaller than the height of the second step structure (412) in the optical axis direction. In addition, the second portion (414b) can penetrate 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 smaller than the width (a1) of the first groove (413) in the second direction.

[0181] The frame (410) includes a plurality of step structures including a first groove (413) and a second groove (414), and a filling material (epoxy) can be filled between the frame (410) and the first substrate (430) and the second substrate (440). The first groove (413) and the second groove (414) can facilitate the flow of the filling material, thereby allowing the first substrate (430) and the second substrate (440) to be more stably fixed to the frame (410).

[0182] The frame (410) may include an incident hole (415). The incident hole (415) is arranged at the bottom of the first substrate and the second substrate to support the first substrate and the second substrate and is arranged to overlap the first input diffractive element and the second input diffractive element so that light can be incident on the first input diffractive element and the second input diffractive element. The incident hole (415) may be located on a plate arranged at the bottom of the frame (410). The optical axis may pass through the center of the incident hole (415) of the frame (410) and may be perpendicular to the plate of the frame (410).

[0183] FIG. 8 is an enlarged top view of a portion of a frame of a light guide device according to another embodiment of the present invention, and FIG. 9 is a top view of a first substrate according to an embodiment of the present invention.

[0184] Referring to FIGS. 8 and 9, the frame (510) may include a first protrusion (511) protruding from the inner surface in a second direction perpendicular to the optical axis direction and a second protrusion (512) protruding in a third direction perpendicular to the optical axis direction and the second direction.

[0185] The first protrusion (511) may protrude in a second direction from the inner surface of the frame (510). The first protrusion (511) may have a constant width in the second direction. In addition, the first protrusion (511) may have a constant width in a third direction. The second protrusion (512) may protrude in a third direction from the inner surface of the frame (510). The second protrusion (512) may protrude in a direction perpendicular to the first protrusion (511). The second protrusion (512) may have constant widths in the second direction and the third direction. The third direction is a direction perpendicular to the optical axis direction and the second direction, and may be a direction parallel to the short axis direction of the frame (510).

[0186] The frame (510) may include an incident hole (513). The incident hole (513) is arranged at the bottom of the first substrate and the second substrate to support the first substrate and the second substrate and is arranged to overlap with the first input diffractive element and the second input diffractive element so that light can be incident on the first input diffractive element and the second input diffractive element. The incident hole (513) may be arranged to overlap with the first protrusion (511) in the second direction and to overlap with the second protrusion (512) in the third direction. In addition, the incident hole (513) may overlap with the first input diffractive element (531) in the optical axis direction.

[0187] The frame (510) can be assembled by aligning and fixing the cover (520), the first substrate (530), and the second substrate (540) on the frame (510) including the first protrusion (511) and the second protrusion (512).

[0188] The light guide device (500) is disposed on a first substrate (530) and may include a first input diffractive element (531) onto which light is incident. The first input diffractive element (531) may be disposed between a first protrusion (511) and a first output diffractive element (533). The first protrusion (511) may overlap the center of the first input diffractive element (531) in a second direction. In addition, the second protrusion (512) may overlap the center of the first input diffractive element (531) in a third direction. The first protrusion (511) and the second protrusion (512) are arranged so as to overlap with the center of the first input diffraction element (531), so that the center of the first input diffraction element (531) can be aligned on the optical axis, and the first substrate (530) can be fixed and assembled on the frame (510) while aligning the first input diffraction element (531).

[0189] 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 and a fourth groove (530a, 530b), and the second substrate (540) may include a fifth groove and a sixth groove (not shown). In this case, each groove may be arranged to overlap with the first protrusion (511) and the second protrusion (512). The plurality of grooves may overlap with the first protrusion (511) and the second protrusion (512) in the optical axis direction, so that the first protrusion (511) and the second protrusion (512) may be arranged in each groove.

[0190] The first groove and the fifth groove may be arranged to overlap with the third groove (530a) in the optical axis direction. In addition, the second groove and the sixth groove may be arranged to overlap with the fourth groove (530b) in the optical axis direction. Ultimately, the first groove, the third groove (530a), and the fifth groove may overlap with the first protrusion (511) in the optical axis direction, and the second groove, the fourth groove (530b), and the sixth groove may overlap with the second protrusion (512) in the optical axis direction.

[0191] The cover (520), the first substrate (530), and the second substrate (540) each include two grooves so that the cover (520), the first substrate (530), and the second substrate (540) can be fixed to the protrusion of the frame (510). Accordingly, the center of the first input diffraction element (531) can be aligned on the optical axis, and the first substrate (530) and the second substrate (540) can be fixed to the frame (510) for assembly. Accordingly, the light guide device (400) can be improved in optical performance by being resistant to external impact or scratches, errors can be reduced during the manufacturing process, and the manufacturing process can be performed quickly and precisely.

[0192] Although the above description focuses on examples, these are merely examples and do not limit the present invention. Those skilled in the art will appreciate that various modifications and applications not exemplified above are possible without departing from the essential characteristics of the present invention. For example, each component specifically shown in the examples can be modified and implemented. In addition, differences related to such modifications and applications should be construed as being included within the scope of the present invention defined in the appended claims.

Claims

1. Frame; and It includes a cover, a first substrate and a second substrate sequentially arranged on the frame; The above frame includes a first step structure and a second step structure, An optical guide device in which the cover is disposed on the first step structure and the first substrate is disposed on the second step structure.

2. In paragraph 1, The cover, the first substrate, and the second substrate are arranged spaced apart from each other in the first direction, The above first step structure protrudes from the inner surface of the frame in a direction perpendicular to the first direction, The above second step structure is a light guide device that protrudes in a direction perpendicular to the first direction from the side of the above first step structure.

3. In paragraph 2, The above cover overlaps the first step structure in the first direction, The above first substrate is an optical guide device that overlaps the first step structure in a direction perpendicular to the first direction.

4. In paragraph 3, The first substrate overlaps the second step structure in the first direction, The second substrate is an optical guide device that overlaps the second step structure in a direction perpendicular to the first direction.

5. In paragraph 1, The area of ​​the above cover is larger than the area of ​​the first substrate, An optical guide device in which the area of ​​the first substrate is larger than the area of ​​the second substrate.

6. In paragraph 2, The above frame is a light guide device including a first groove and a second groove spaced apart from the first groove.

7. In paragraph 6, The above first home is arranged in the above first step structure, The above second groove is a light guide device arranged in the first step structure and the second step structure.

8. In paragraph 7, An optical guide device in which the second groove includes a first portion overlapping the first step structure in the first direction and a second portion overlapping the second step structure in the first direction.

9. In paragraph 8, The second part is a light guide device that penetrates the second step structure in a direction perpendicular to the first direction.

10. In paragraph 8, The second part is a light guide device that penetrates the second step structure in the first direction.

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