Optical device and electronic device including the same

Abstract

An embodiment discloses an optical device comprising: a barrel in which an outer lens is disposed; a light guide disposed within the barrel; a lens coupled to the light guide; and a light source that emits light into the light guide; wherein the distance between the light guide and the lens is less than the distance between the light source and the lens.

Description

[Technical Field]

[0001] Embodiments relate to optical devices and electronic devices that include the same. [Background technology]

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

[0003] Augmented reality (AR) is a technology that synthesizes virtual objects and information into the real environment, making them appear as if they actually exist in the real environment.

[0004] Mixed reality (MR) or hybrid reality refers to the combination of the virtual and real worlds to create new environments and information. In particular, it refers to the ability to interact in real time between real and virtual worlds.

[0005] The virtual environments and situations created stimulate the user's five senses and allow them to freely move between reality and imagination by experiencing space and time similar to reality. In addition to simply being immersed in the environment, users can also interact with the things embodied in the environment by using real devices to operate and give commands.

[0006] Recently, research into gear and devices used in this field has been actively conducted, but there is an increasing need to provide miniaturization and high resolution for such equipment. Summary of the Invention [Problem to be solved by the invention]

[0007] In the embodiment, when using an optical device used in AR (Augmented Reality) and an electronic device including the same, the lens is arranged in the light guide so as to be adjacent to the light source, thereby providing an optical device and an electronic device that can be more easily miniaturized.

[0008] Also provided are optical devices and electronic devices that are more reliable and allow for easier alignment of the optical axis.

[0009] In addition, the second light guide provides an optical device and an electronic device with improved light efficiency.

[0010] Also provided are optical devices and electronic devices that further improve light efficiency by including a birefringent member.

[0011] It also provides optical and electronic devices that are more compact and have improved optical uniformity.

[0012] Also provided are an optical device with improved resolution and an electronic device including the same.

[0013] Also provided is an optical device with improved reliability and an electronic device including the same.

[0014] Also provided is an optical device that is easy to inspect and has improved bonding strength and durability, and an electronic device including the same.

[0015] The problems to be solved by the examples are not limited to these, but also include the objectives and effects that can be grasped from the means for solving the problems and embodiments described below. [Means for solving the problem]

[0016] The optical device of the embodiment includes a barrel in which an outer lens is disposed; a light guide disposed within the barrel; a lens coupled to the light guide; and a light source that emits light into the light guide; and the distance between the light guide and the lens may be smaller than the distance between the light source and the lens.

[0017] The light guide may be in contact with the lens.

[0018] The distance between the lens and the light source may be less than the length of the light guide.

[0019] The number of the lenses may correspond to the number of the light sources.

[0020] It may include a first spacer in contact with the outer lens; and a second spacer in contact with the light guide.

[0021] The size of the second spacer may be larger than the size of the light guide and smaller than the sum of the size of the light guide and the size of the lens.

[0022] The size of the second spacer may be greater than the sum of the size of the lens and the size of the light guide.

[0023] The light guide may include at least one prism.

[0024] The light guide may include an X-prism.

[0025] a housing surrounding the barrel; and the light source may be disposed within the housing.

[0026] The barrel may include a first groove in which the outer lens is disposed and a second groove in which the light guide is disposed.

[0027] The first groove and the second groove may be spaced apart.

[0028] The inner surface of the second groove in the barrel may include a barrel groove that bulges outward.

[0029] The barrel may include a barrel protrusion on an inner surface thereof that protrudes toward the light guide.

[0030] The size of the barrel protrusion may be smaller than the size of the light guide.

[0031] The size of the lens may be smaller than the size of the light guide.

[0032] The lens may bulge towards the light source.

[0033] The optical device of the embodiment includes a plurality of lenses; a barrel in which the plurality of lenses are arranged; a first light guide arranged in the barrel; an opening formed in a side of the barrel; and a light source device coupled to the opening; wherein the light source device includes a housing in which an opening is formed; a light source arranged in the housing and emitting light; and a second light guide arranged between the first light guide and the light source.

[0034] The light may be unpolarized.

[0035] The second light guide may reflect light transmitted through the first light guide.

[0036] The light source device may include a light source lens disposed between the light source and the second light guide.

[0037] A third light guide may be disposed within the housing.

[0038] The third light guide may be disposed between the light source and the first light guide.

[0039] The light source may emit the light towards the third light guide.

[0040] The third light guide may include a non-polarizing prism.

[0041] The light source device may include a birefringent member disposed within the housing.

[0042] The light source device may include a light source lens disposed between the light source and the second light guide; and the birefringent member may be disposed between the light source lens and the light source.

[0043] The light source lens may be disposed between the birefringent member and the second light guide.

[0044] The light source device includes a light source lens disposed between the light source and the second light guide; and the birefringent member may be disposed between the light source lens and the light source or between the second light guide and the light source lens.

[0045] The birefringent member can perform a phase delay on the light.

[0046] The birefringent member may be disposed on an inner surface of the housing.

[0047] The first light guide may include a polarization separating member that reflects light of a first polarization and transmits light of a second polarization. [Effects of the Invention]

[0048] In the embodiment, when using an optical device used in AR (Augmented Reality) and an electronic device including the same, the lens is arranged in the light guide so as to be adjacent to the light source, thereby realizing an optical device and an electronic device that can be more easily miniaturized.

[0049] Furthermore, optical devices and electronic devices that are more reliable and have easier optical axis alignment can be realized.

[0050] In addition, the second light guide can provide optical and electronic devices with improved light efficiency.

[0051] Furthermore, by including a birefringent member, optical devices and electronic devices with improved optical efficiency can be realized.

[0052] In addition, optical devices and electronic devices that are more compact and have improved optical uniformity can be realized.

[0053] In addition, an optical device with improved resolution and an electronic device including the same can be realized.

[0054] Furthermore, it is possible to realize an optical device and an electronic device including the same with improved reliability.

[0055] In addition, an optical device and an electronic device including the same can be realized that are easy to inspect and have improved bonding strength and durability.

[0056] The various beneficial advantages and effects of the present invention are not limited to the above, but will be more easily understood in the course of describing specific embodiments of the present invention. [Brief explanation of the drawings]

[0057] [Figure 1] FIG. 1 is a conceptual diagram showing an embodiment of an AI device.

[0058] [Figure 2] 1 is a block diagram showing a configuration of an augmented reality electronic device according to an embodiment of the present invention.

[0059] [Figure 3] 1 is a perspective view of an augmented reality electronic device according to a first embodiment of the present invention;

[0060] [Figure 4] 3A to 3C are conceptual diagrams illustrating various display modes applicable to a display unit according to an embodiment of the present invention. [Figure 5]3A to 3C are conceptual diagrams illustrating various display modes applicable to a display unit according to an embodiment of the present invention. [Figure 6] 3A to 3C are conceptual diagrams illustrating various display modes applicable to a display unit according to an embodiment of the present invention.

[0061] [Figure 7] 1 is a perspective view of an optical device according to an embodiment.

[0062] [Figure 8] 1 is an exploded perspective view of an optical device according to an embodiment.

[0063] [Figure 9] FIG. 2 is a perspective view of a barrel of an optical device according to an embodiment.

[0064] [Figure 10] FIG. 2 is a side view of a barrel of an optical device according to an embodiment.

[0065] [Figure 11] 1 is a bottom view of a barrel into which a light guide is inserted in an optical device according to an embodiment.

[0066] [Figure 12] 1 is a diagram illustrating the combination of an outer lens, a first spacer, a light guide, a lens, and a second spacer as a barrel in an optical device according to an embodiment.

[0067] [Figure 13] 1 is a diagram illustrating a coupling between a barrel, a housing, and an additional housing in an optical device according to an embodiment.

[0068] [Figure 14] 4 is a view illustrating a coupling between a housing and a light source unit in an optical device according to an embodiment.

[0069] [Figure 15] This is a view taken along the line AA' in FIG.

[0070] [Figure 16] This is an enlarged view of the K1 portion in FIG.

[0071] [Figure 17] FIG. 2 is a bottom view of a barrel, a light guide, and a lens in an optical device according to one embodiment.

[0072] [Figure 18] 18 is a view showing a configuration in which a second spacer is further included in FIG. 17.

[0073] [Figure 19] FIG. 10 is a cross-sectional view of an optical device according to another embodiment.

[0074] [Figure 20] FIG. 10 is a conceptual diagram of an optical device according to yet another embodiment.

[0075] [Figure 21] FIG. 10 is a perspective view of an optical device according to yet another embodiment.

[0076] [Figure 22] FIG. 10 is an exploded perspective view of an optical device according to yet another embodiment.

[0077] [Figure 23] This is a view taken along the line BB' in FIG.

[0078] [Figure 24] This is an enlarged view of the K1 portion in FIG.

[0079] [Figure 25] This is an enlarged view of the K2 portion in FIG.

[0080] [Figure 26] This is an enlarged view of part K2 in Figure 23a.

[0081] [Figure 27a] FIG. 10 is a cross-sectional view of a light source device in an optical device according to still another embodiment.

[0082] [Figure 27b] This is a variation of FIG. 27a.

[0083] [Figure 27c] Another variation of FIG. 27a.

[0084] [Figure 27d] This is yet another variation of FIG. 27a.

[0085] [Figure 28a] FIG. 10 is a cross-sectional view of a light source device in an optical device according to still another embodiment.

[0086] [Figure 28b] This is a variation of FIG. 28a.

[0087] [Figure 29a] FIG. 10 is a cross-sectional view of a light source device in an optical device according to still another embodiment.

[0088] [Figure 29b] This is a variation of FIG. 29a.

[0089] [Figure 29c] Another variation of FIG. 29a. DETAILED DESCRIPTION OF THE INVENTION

[0090] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0091] However, the technical concept of the present invention is not limited to the described embodiments and may be embodied in various different forms, and one or more of the components of the embodiments may be selectively combined or substituted within the scope of the technical concept of the present invention.

[0092] Furthermore, unless otherwise clearly defined and described, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted in a way that would be commonly understood by a person of ordinary skill in the art to which the present invention belongs, and commonly used terms, such as dictionary-defined terms, may be interpreted in light of the contextual meaning of the relevant art.

[0093] Furthermore, the terms used in the embodiments of the present invention are intended to explain the embodiments and are not intended to limit the present invention.

[0094] In this specification, the singular can also include the plural unless otherwise specified in the context, and when it is stated as "A and (and) at least one (or more) of B and C," it can include one or more of all possible combinations of A, B, and C.

[0095] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of embodiments of the present invention.

[0096] Such terms are merely used to distinguish a component from other components, and are not intended to limit the nature, order, or sequence of the components.

[0097] Furthermore, when a component is described as being "coupled," "coupled," or "connected" to another component, it can include not only cases where the component is directly coupled, coupled, or connected to the other component, but also cases where the component is "coupled," "coupled," or "connected" by yet another component between the component and the other component.

[0098] Furthermore, when it is described as being formed or disposed "above or below" each component, "above" or "below" includes not only the case where two components are in direct contact with each other but also the case where one or more other components are formed or disposed between the two components. Furthermore, when it is expressed as "above or below," it can mean not only the upper direction but also the lower direction based on one component.

[0099] FIG. 1 is a conceptual diagram showing an embodiment of an AI device.

[0100] 1, the AI ​​system includes at least one of an AI server 16, a robot 11, an autonomous vehicle 12, an XR device 13, a smartphone 14, and a home appliance 15 connected to a cloud network 10. Here, the robot 11, the autonomous vehicle 12, the XR device 13, the smartphone 14, and the home appliance 15 to which AI technology is applied may be referred to as the AI ​​devices 11 to 15.

[0101] The cloud network 10 may refer to a network that constitutes a part of a cloud computing infrastructure or exists in 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, or the like.

[0102] That is, the devices 11 to 16 constituting the AI ​​system can be connected through the cloud network 10. In particular, the devices 11 to 16 can communicate with each other through a base station, or can communicate with each other directly without going through a base station.

[0103] The AI ​​server 16 may include a server that performs AI processing and a server that performs calculations on big data.

[0104] The AI ​​server 16 is connected to at least one of the AI ​​devices that make up the AI ​​system, namely, a robot 11, an autonomous vehicle 12, an XR device 13, a smartphone 14, or a home appliance 15, via a cloud network 10, and can assist in at least part of the AI ​​processing of the connected AI devices 11 to 15.

[0105] At this time, the AI ​​server 16 can train the artificial neural network using a machine learning algorithm instead of the AI ​​devices 11 to 15, and can directly store or transmit the learned model to the AI ​​devices 11 to 15.

[0106] At this time, the AI ​​server 16 receives input data from the AI ​​devices 11 to 15, infers a result value for the received input data using a learning model, and generates a response or control command based on the inferred result value and transmits it to the AI ​​devices 11 to 15.

[0107] Alternatively, the AI ​​devices 11 to 15 may use a direct learning model to infer a result value for input data, and generate a response or control command based on the inferred result value.

[0108] <AI+ロボット>

[0109] The robot 11 can be realized as a guide robot, a transport robot, a cleaning robot, a wearable robot, an entertainment robot, a pet robot, an unmanned flying robot, etc. by applying AI technology.

[0110] The robot 11 may include a robot control module for controlling its operation, and the robot control module may refer to a software module or a chip that embodies the same in hardware.

[0111] The robot 11 can use sensor information acquired from various types of sensors to acquire status information of the robot 11, detect (recognize) the surrounding environment and objects, generate map data, determine a movement route and driving plan, determine a response to user interaction, and determine its actions.

[0112] Here, the robot 11 can use sensor information acquired by at least one of a lidar, a radar, and a camera to determine a movement path and a travel plan.

[0113] The robot 11 can perform the above-described actions using a learning model configured with at least one artificial neural network. For example, the robot 11 can recognize the surrounding environment and objects using the learning model, and can determine actions using the recognized surrounding environment information or object information. Here, the learning model can be learned directly by the robot 11 or can be learned by an external device such as the AI ​​server 16.

[0114] At this time, the robot 11 may generate results and perform an action directly using a learning model, or may transmit sensor information to an external device such as an AI server 16, receive the results generated thereby, and perform an action.

[0115] The robot 11 determines a movement route 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 controls the driving unit to make the robot 11 move according to the determined movement route and driving plan.

[0116] The map data may include object identification information for various objects located in the space in which the robot 11 moves. For example, the map data may include object identification information for fixed objects such as walls and doors, and movable objects such as flower pots and desks. The object identification information may include names, types, distances, locations, etc.

[0117] In addition, the robot 11 can perform operations or travel by controlling the drive unit based on the control / interaction of the user. At this time, the robot 11 can obtain the intention information of the interaction by the user's actions or voice utterances, and determine a response based on the obtained intention information to perform an operation.

[0118] <AI + Autonomous Driving>

[0119] The autonomous driving vehicle 12 can be embodied in a mobile robot, a vehicle, an unmanned aerial vehicle, etc. by applying AI technology.

[0120] 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 mean a software module or a chip embodied by hardware thereof. The autonomous driving control module may be included inside as a component of the autonomous driving vehicle 12, or may be separately configured by separate hardware outside the autonomous driving vehicle 12 and connected thereto.

[0121] The autonomous driving vehicle 12 can obtain the state information of the autonomous driving vehicle 12, detect (recognize) the surrounding environment and objects, generate map data, determine a moving route and a travel plan, and determine an operation by using the sensor information obtained from various types of sensors.

[0122] Here, in order to determine the moving route and the travel plan, the autonomous driving vehicle 12 can use the sensor information obtained by at least one or more sensors among a lidar, a radar, and a camera, similar to the robot 11.

[0123] In particular, for the environment and objects in an area where the field of view of the autonomous driving vehicle 12 is blocked or an area at a distance of a certain distance or more, the autonomous driving vehicle 12 can receive and recognize the sensor information from an external device, or receive the information directly recognized by the external device.

[0124] The autonomous vehicle 12 can perform the above-described operations using a learning model configured with at least one artificial neural network. For example, the autonomous vehicle 12 can recognize the surrounding environment and objects using the learning model, and can determine a driving path using the recognized surrounding environment information or object information. Here, the learning model can be trained directly by the autonomous vehicle 12 or trained by an external device such as the AI ​​server 16.

[0125] At this time, the autonomous vehicle 12 may generate results and perform operations using a direct learning model, or may transmit sensor information to an external device such as an AI server 16, receive the results generated thereby, and perform operations.

[0126] The autonomous vehicle 12 determines a travel route and a travel plan using at least one of map data, object information detected from sensor information, or object information acquired from an external device, and controls the driving unit to drive the autonomous vehicle 12 according to the determined travel route and travel plan.

[0127] The map data may include object identification information for various objects located in a space (e.g., a road) in which the autonomous vehicle 12 travels. For example, the map data may include object identification information for fixed objects such as street lights, rocks, and buildings, and movable objects such as vehicles and pedestrians. The object identification information may include name, type, distance, location, etc.

[0128] Furthermore, the autonomous vehicle 12 can perform an action or move by controlling the driving unit based on the control / interaction of the user. At this time, the autonomous vehicle 12 can acquire intention information of the interaction through the user's action or voice utterance, determine a response based on the acquired intention information, and perform an action.

[0129] <AI+XR>

[0130] The XR device 13 can be implemented in an HMD (Head-Mount Display), a HUD (Head-Up Display) equipped in a vehicle, a TV, a mobile phone, a smartphone, a computer, a wearable device, a household appliance, a digital signage, a vehicle, a stationary robot, a mobile robot, etc. by applying AI technology.

[0131] The XR device 13 can acquire information about the surrounding space or real objects by analyzing 3D point cloud data or image data obtained through various sensors or from external devices to generate position data and attribute data for 3D points, and can render and output an XR object that outputs the acquired information. For example, the XR device 13 can output an XR object including additional information about the recognized object corresponding to the recognized object.

[0132] The XR device 13 can perform the above operations by using a learning model composed of at least one artificial neural network. For example, the XR device 13 can recognize real objects with 3D point cloud data or image data by using the learning model and can provide information corresponding to the recognized real objects. Here, the learning model can be directly learned by the XR device 13 or learned by an external device such as the AI server 16.

[0133] At this time, the XR device 13 may directly use the learning model to generate results and perform operations, or may transmit sensor information to an external device such as the AI server 16 and receive the results generated thereby to perform operations.

[0134] <AI + Robot + Autonomous Driving>[

[0135] The robot 11 can be implemented in a guiding robot, a transporting robot, a cleaning robot, a wearable robot, an entertainment robot, a pet robot, a drone, etc. by applying AI technology and autonomous driving technology.

[0136] The robot 11 to which AI technology and autonomous driving technology are applied may refer to a robot itself with an autonomous driving function, or a robot 11 that interacts with an autonomous driving vehicle 12, etc.

[0137] The robot 11 having an autonomous traveling function can be commonly called a device that moves along a given path by itself without user control, or that moves by determining its own path.

[0138] The robot 11 and the autonomous vehicle 12 having an autonomous driving function may use a common sensing method to determine one or more of a travel path or a travel plan. For example, the robot 11 and the autonomous vehicle 12 having an autonomous driving function may determine one or more of a travel path or a travel plan using information sensed through a lidar, a radar, or a camera.

[0139] The robot 11 that interacts with the autonomous vehicle 12 exists separately from the autonomous vehicle 12, but can be linked to an autonomous driving function inside or outside the autonomous vehicle 12, or can perform operations linked to a user on board the autonomous vehicle 12.

[0140] 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.

[0141] Alternatively, the robot 11 interacting with the autonomous vehicle 12 may monitor the user aboard 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 dozing, it may 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 may include not only the autonomous driving function but also functions provided by a navigation system or an audio system installed inside the autonomous vehicle 12.

[0142] Alternatively, the robot 11 that interacts with the autonomous vehicle 12 may provide information or assist functions to the autonomous vehicle 12 outside the autonomous vehicle 12. For example, the robot 11 may provide traffic information, including traffic signal information, to the autonomous vehicle 12 like a smart traffic light, or may interact with the autonomous vehicle 12 and automatically connect an electric charger to a charging port like an automatic electric charger for an electric vehicle.

[0143] <AI+ロボット+XR>

[0144] The robot 11 may be implemented as a guide robot, a transport robot, a cleaning robot, a wearable robot, an entertainment robot, a pet robot, an unmanned flying robot, a drone, etc., by applying AI technology and XR technology.

[0145] The robot 11 to which XR technology is applied may refer to a robot that is the target of control / interaction within an XR image. In this case, the robot 11 may be separated from the XR device 13 and may be linked to each other.

[0146] When the robot 11 that is the target of control / interaction within the XR image acquires 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. And such a robot 11 can operate based on a control signal input through the XR device 13 or the interaction of the user.

[0147] For example, the user can remotely view an XR image corresponding to the perspective of the robot 11 linked through an external device such as the XR device 13, adjust the autonomous driving path of the robot 11 through interaction, control the operation or driving, or check information on surrounding objects.

[0148] <AI+Autonomous Driving+XR>

[0149] The autonomous driving vehicle 12 can be embodied in a mobile robot, a vehicle, a drone, etc. with AI technology and XR technology applied.

[0150] The autonomous driving vehicle 12 to which XR technology is applied can refer to an autonomous driving vehicle equipped with means for providing an XR image, an autonomous driving vehicle that is the target of control / interaction within the XR image, etc. In particular, the autonomous driving vehicle 12 that is the target of control / interaction within the XR image can be distinguished from the XR device 13 and interlocked with each other.

[0151] The autonomous driving vehicle 12 equipped with means for providing an XR image can acquire sensor information from sensors including a camera and output an XR image generated based on the acquired sensor information. For example, the autonomous driving vehicle 12 can provide an XR object corresponding to a real object or an object on the screen to the passengers by outputting an XR image with a HUD.

[0152] In this case, when an XR object is output to a HUD, at least a portion of the XR object may be output to overlap with an actual object toward which the passenger's gaze is directed. Conversely, when an XR object is output to a display provided inside the autonomous vehicle 12, at least a portion of the XR object may be output to overlap with an object on the screen. For example, the autonomous vehicle 12 may output XR objects corresponding to objects such as roads, other vehicles, traffic lights, traffic signs, motorcycles, pedestrians, buildings, etc.

[0153] When the autonomous vehicle 12, which is the target of control / interaction within the XR image, acquires sensor information from sensors including a camera, 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 then operate based on a control signal input through an external device such as the XR device 13 or user interaction.

[0154] [Augmented reality technology]

[0155] Augmented 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 virtual CG images on top of images of real objects, and MR technology is a computer graphics technology that combines virtual objects with the real world.

[0156] MR technology is similar to AR technology in that it allows both real and virtual objects to be displayed, but the difference is that in AR technology, virtual objects are used to complement real objects, while in MR technology, virtual objects and real objects are used as equals.

[0157] XR technology can be applied to HMDs (Head-Mount Displays), HUDs (Head-Up Displays), mobile phones, tablet PCs, laptops, desktops, TVs, digital signage, etc., and devices to which XR technology is applied can be called XR devices.

[0158] Hereinafter, an electronic device that provides augmented reality according to an embodiment of the present invention will be described, particularly an optical device applied to augmented reality and an electronic device including the same.

[0159] FIG. 2 is a block diagram showing the configuration of an augmented reality electronic device 20 according to an embodiment of the present invention.

[0160] 2, the augmented 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 realizing the electronic device 20, and therefore the electronic device 20 described herein may have more or fewer components than those described above.

[0161] More specifically, the wireless communication unit 21 among the components 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. The wireless communication unit 21 may also include one or more modules that connect the electronic device 20 to one or more networks.

[0162] 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.

[0163] The input unit 22 may include a camera or video input unit for inputting a video signal, a microphone or audio input unit for inputting an audio signal, and a user input unit (e.g., touch keys, mechanical keys, etc.) for receiving information input from a user. The voice data and image data collected by the input unit 22 may be analyzed and processed as a user control command.

[0164] 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 environment surrounding the electronic device 20, and user information.

[0165] 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 gravity sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared sensor (IR sensor), a fingerprint sensor, an ultrasonic sensor, an optical sensor (e.g., a photographing unit), a microphone, a battery gauge, an environmental sensor (e.g., a barometer, a hygrometer, a thermometer, a radiation sensor, a heat sensor, a gas sensor, etc.), and a chemical sensor (e.g., an electronic nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the electronic device 20 disclosed herein may combine and utilize information sensed by at least two or more of these sensors.

[0166] The output unit 24 generates output related to vision, hearing, or touch, 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 layered with a touch sensor or may be integrally formed with the touch sensor to implement a touch screen. Such a touch screen may function as a user input means that provides an input interface between the augmented reality electronic device 20 and a user, and may also provide an output interface between the augmented reality electronic device 20 and a user.

[0167] The interface unit 25 serves as a passageway between the electronic device 20 and 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 devices and can perform mutual interaction by exchanging various input signals, sensing signals, and data.

[0168] 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.

[0169] The memory 26 also stores data supporting various functions of the electronic device 20. The memory 26 may store a number of application programs (or applications) run by the electronic device 20, as well as data and commands for the operation of the electronic device 20. At least some of these application programs may be downloaded from an external server via wireless communication. At least some of these application programs may be present on the electronic device 20 from the time of shipment for the basic functions of the electronic device 20 (e.g., incoming call, outgoing call, message receiving, and outgoing call functions).

[0170] In addition to operations related to application programs, 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 above-mentioned components.

[0171] In addition, the control unit 27 can control at least some of the components to provide appropriate information to a user or process functions by running an application program stored in the memory 26. Furthermore, the control unit 27 can operate at least two or more components included in the electronic device 20 in combination with each other to run the application program.

[0172] In addition, the control unit 27 may sense the movement of the electronic device 20 or the user using a gyroscope sensor, a gravity sensor, a motion sensor, etc. included in the sensing unit 23. Alternatively, the control unit 27 may sense an object approaching the electronic device 20 or the user's vicinity using a proximity sensor, an illuminance sensor, a magnetic sensor, an infrared sensor, an ultrasonic sensor, an optical sensor, etc. included in the sensing unit 23. In addition, the control unit 27 may sense the movement of the user through a sensor provided in a controller that operates in conjunction with the electronic device 20.

[0173] In addition, the control unit 27 can perform the operation (or function) of the electronic device 20 using an application program stored in the memory 26 .

[0174] Under the control of the control unit 27, the power supply unit 28 receives an external or internal power source and supplies power to each component included in the electronic device 20. The power supply unit 28 includes a battery, which may be built-in or replaceable.

[0175] At least some of the 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 running at least one application program stored in memory 26.

[0176] 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 mobile phones, smartphones, laptop computers, digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation systems, slate PCs, tablet PCs, ultrabooks, and wearable devices. In addition to HMDs, wearable devices may also include smart watches, contact lenses, VR / AR / MR Glasses, and the like.

[0177] FIG. 3 is a perspective view of an augmented reality electronic device according to an embodiment of the present invention.

[0178] As shown in FIG. 3, the electronic device according to the embodiment of the present invention may include a frame 100, an optical device 200, and a display unit 300.

[0179] The electronic device may be provided as glasses (smart glasses). The glasses-type electronic device is configured to be wearable on the head of a human body, and for this purpose may be provided with a frame (case, housing, etc.) 100. The frame 100 may be made of a flexible material so that it is easy to wear.

[0180] The frame 100 is supported on the head and has a space for mounting various components. As shown, electronic components such as an optical 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 removably mounted on the frame 100.

[0181] As shown in the drawings, the frame 100 may have the form of glasses worn on the face of the user's body, but is not limited thereto and may have the form of goggles worn in close contact with the user's face.

[0182] The 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 aligned with each other.

[0183] Frame 100 may have the same or different lengths DI in the x-direction and LI in the y-direction.

[0184] The optical device 200 is provided to control various electronic components provided in the electronic device.

[0185] The optical device 200 can generate an image or a series of images visible to a user. The optical device 200 can include an image source panel that generates an image and a plurality of lenses that diffuse and converge light generated by the image source panel.

[0186] The optical device 200 may be fixed to one of the two side frames 120. For example, the optical 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 one of the side frames 120. Alternatively, the optical device 200 may be fixed to the front frame 110 or provided separately from the electronic device.

[0187] 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 worn on the head and displays images directly in front of the user's eyes. When a user wears an electronic device, the display unit 300 may be disposed to correspond to at least one of the left and right eyes so as to provide images directly in front of the user's eyes. In this drawing, the display unit 300 is shown positioned at a position corresponding to the right eye so as to output images to the user's right eye. However, as described above, the present invention is not limited to this and may be disposed at both the left and right eyes.

[0188] The display unit 300 allows a user to visually recognize the external environment while simultaneously viewing an image generated by the optical device 200. For example, the display unit 300 may project an image onto a display area using a prism.

[0189] The display unit 300 may be formed to be translucent so that the projected image and the general field of view in front of the user (the range the user looks through the eyes) can be seen simultaneously. For example, the display unit 300 may be translucent and may be formed of an optical member including glass.

[0190] The display unit 300 may be inserted into an opening included in the front frame 110 and fixed thereto, or may be located behind the opening (i.e., between the opening and the user) and fixed thereto. Although the drawings show an example in which the display unit 300 is located behind the opening and fixed to the front frame 110, the display unit 300 may be disposed and fixed at various positions on the frame 110.

[0191] As shown in FIG. 3, when image light for an image is incident from the optical device 200 to one side of the display unit 300, the image light is emitted to the other side through the display unit 300, allowing the image generated by the optical device 200 to be seen by the user.

[0192] As a result, a user can view the external environment through the opening of the frame 100 while simultaneously viewing the image generated by the optical device 200. That is, the image output through the display unit 300 can be seen overlapping with the general field of view. By utilizing these display characteristics, electronic devices can provide augmented reality (AR), which overlays a virtual image on a real image or background to display it as a single image.

[0193] Furthermore, for a short period of time that would be unnoticeable to a person other than through such driving, the external environment and the image generated by the optical device 200 can be provided to the user with a time lag. For example, within one frame, the external environment can be provided to the user in one section, and an image from the optical device 200 can be provided to the user in another section.

[0194] Alternatively, both overlap and lag may be provided.

[0195] 4 to 6 are conceptual diagrams illustrating various display methods applicable to the display unit according to the embodiment of the present invention.

[0196] Specifically, FIG. 4 is a diagram for explaining an embodiment of a prism-type optical element, FIG. 5 is a diagram for explaining an embodiment of a waveguide-type optical element, and FIG. 6 is a diagram for explaining an embodiment of a surface reflection-type optical element.

[0197] As shown in FIG. 4, a prism-type optical member may be used in the display unit 300-1 according to an embodiment of the present invention.

[0198] As an example, a prism-type optical element may be a flat-type glass optical element in which the surface where the image light enters and the surface where the image light exits 300a are flat, as shown in FIG. 4(a), or a freeform glass optical element in which the surface where the image light exits 300b is formed as a curved surface without a fixed radius of curvature, as shown in FIG. 4(b).

[0199] The flat-type glass optical element receives the image light generated by the optical device 200 at its flat side, reflects it by the total reflection mirror 300a provided inside, and emits it toward the user. Here, the total reflection mirror 300a provided inside the flat-type glass optical element can be formed inside the flat-type glass optical element by a laser.

[0200] The freeform glass optical element is configured so that its thickness decreases as it moves away from the incident surface, and the image light generated by the optical device 200 is incident on the curved side, and is totally reflected internally and output to the user.

[0201] As shown in FIG. 5, a display unit 300-2 according to another embodiment of the present invention may use a waveguide type optical element or a light guide optical element (LOE).

[0202] Examples of such waveguide or light guide type optical elements include a segmented beam splitter type glass optical element as shown in FIG. 5(a), a sawtooth prism type glass optical element as shown in FIG. 5(b), a diffractive optical element (DOE) type glass optical element as shown in FIG. 5(c), a hologram optical element (HOE) type glass optical element as shown in FIG. 5(d), a passive grating type glass optical element as shown in FIG. 5(e), and an active grating type glass optical element as shown in FIG. 5(f).

[0203] As shown in Figure 5(a), a glass optical element using a segmented beam splitter may have a total reflection mirror 301a on the side where an optical image enters the glass optical element and a segmented beam splitter 301b on the side where the optical image exits.

[0204] Accordingly, the optical image generated by the optical device 200 is totally reflected by the total reflection mirror 301a inside the glass optical element, and the totally reflected optical image is guided along the longitudinal direction of the glass, and is partially separated and emitted by the partial reflection mirror 301b, so that it can be perceived by the user's vision.

[0205] In the sawtooth prism type glass optical member shown in FIG. 5(b), image light from the optical device 200 is incident on the side of the glass in a diagonal direction, is totally reflected inside the glass, and is emitted to the outside of the glass through sawtooth-shaped irregularities 302 provided on the side from which the light image is emitted, so that it can be recognized by the user's eyes.

[0206] A glass optical member having a diffractive optical element (DOE) as shown in Figure 5(c) may have a first diffractive portion 303a on the surface where an optical image is incident and a second diffractive portion 303b on the surface where the optical image is emitted. The first and second diffractive portions 303a and 303b may be provided by patterning a specific pattern on the surface of the glass or by attaching a separate diffractive film.

[0207] Accordingly, the optical image generated by the optical device 200 is diffracted while entering through the first diffraction unit 303a, and is totally reflected while being guided along the longitudinal direction of the glasses, and exits through the second diffraction unit 303b, where it can be visually recognized by the user.

[0208] A glass optical member having a hologram optical element (HOE) as shown in Figure 5(d) may have an out-coupler (304) inside the glass on the side where the optical image is emitted. Accordingly, an optical image is incident from the optical device 200 in a diagonal direction through the side of the glass, is totally reflected, guided along the length of the glass, and is emitted from the out-coupler 304 so that it can be recognized by the user's eyes. Such hologram optical members have slightly different structures and can be further divided into structures with passive gratings and structures with active gratings.

[0209] A glass optical element having a passive grating as shown in Figure 5(e) may have an in-coupler (305a) on the surface opposite the glass surface where an optical image is incident, and an out-coupler (305b) on the surface opposite the glass surface where the optical image is emitted. Here, the in-coupler 305a and the out-coupler 305b may be provided in the form of a film having a passive grating.

[0210] Accordingly, the light image incident on the glass surface on the entrance side of the glass is totally reflected by the in-coupler 305a provided on the opposite surface and guided along the longitudinal direction of the glass, and is output through the opposite surface of the glass by the out-coupler 305b, so that it can be perceived visually by the user.

[0211] A glass optical element having an active grating as shown in FIG. 5(f) may have an in-coupler (306a) formed of an active grating inside the glass on the side where the optical image is incident, and an out-coupler (306b) formed of an active grating inside the glass on the side where the optical image is emitted.

[0212] Accordingly, the optical image incident on the glasses is totally reflected by the in-coupler 306a and guided along the longitudinal direction of the glasses, and is emitted outside the glasses by the out-coupler 306b, so that it can be visually recognized by the user.

[0213] As a modified example, a pin mirror type optical member may be used as the display unit.

[0214] 6(a), a surface reflection type optical element of the freeform combiner type may be used, in which a plurality of flat surfaces with different incident angles of optical images are formed on a single piece of glass to form a curved overall surface. Such freeform combiner glasses 300 may allow optical images to be incident at different angles in different regions and output to the user.

[0215] The flat HOE type surface reflection type optical element as shown in FIG. 6(b) can be provided by coating or patterning a hologram optical element (HOE, 311) on the surface of a flat glass, and an optical image incident on the optical device 200 can pass through the hologram optical element 311, be reflected on the surface of the glass, and pass through the hologram optical element 311 again to be emitted to the user side.

[0216] The freeform HOE type surface reflection type optical element as shown in FIG. 6(c) may be provided by coating or patterning a holographic optical element (HOE, 313) on the surface of a freeform glass, and the operating principle may be the same as that described in FIG. 6(b).

[0217] FIG. 7 is a perspective view of an optical device according to an embodiment, and FIG. 8 is an exploded perspective view of the optical device according to an embodiment.

[0218] 7 and 8, an optical device 200 according to an embodiment may include an outer lens LS, a barrel 210, a housing 220, a light source unit 230, a light guide LG, a lens FL, and an additional housing 240. The optical device 200 may also include a first spacer SP1 and a second spacer SP2.

[0219] First, the outer lens LS can be inserted into the barrel 210. That is, the barrel 210 is located inside the optical device 200 and can accommodate the outer lens LS. The barrel 210 can also accommodate the light guide LG, the lens LF, the first spacer PS1, and the second spacer SP2.

[0220] The barrel 210 may have spaces for accommodating the aforementioned components or additional optical elements. For example, the barrel 210 may include a first groove and a second groove, which will be described later. The outer lens LS may be disposed in the first groove, and the light guide LG may be disposed in the second groove. The first groove and the second groove may be spaced apart in the barrel 210. That is, the barrel 210 has spaces (e.g., grooves) in which the outer lens LS and the light guide LG are disposed, and these spaces may be separated or spaced apart from each other. This may facilitate the insertion or coupling of the outer lens and the light guide.

[0221] Alternatively, if the spaces are interconnected, the optical device can be made smaller.

[0222] An outer lens LS is accommodated in the barrel 210, and a first spacer SP1 may be positioned outside the outer lens LS. The first spacer SP1 is disposed outside the outer lens LS accommodated in the first groove of the barrel 210, and can prevent the outer lens LS from falling off.

[0223] The barrel 210 may include a plurality of holes connected to the second grooves. The plurality of holes may be located on the side of the barrel 210. Thus, light emitted from the light source unit 230 (described later) may be incident on the light guide LG. The light incident on the light guide LG may then be reflected and passed through or transmitted by the outer lens LS to be provided to the waveguide or wave guide. To this end, the first groove and the second groove may be connected by a through-hole. That is, light reflected by the light guide LG in the second groove may be provided to the outer lens LS of the first groove through the through-hole. Furthermore, as described above, light from the light source unit 230 may be output to the inner light guide LG through a plurality of holes located on the side of the barrel 210.

[0224] A light guide LG may be located within the barrel 210. The light guide LG may be coupled to a lens FL, which will be described below.

[0225] The light guide LG may be composed of at least one prism. For example, the light guide LG may be composed of a combination or splice of a plurality of prisms. The light guide LG may include a prism. The prism may include, for example, an X-prism as a reflective member. As an example, the light guide LG may have a structure in which at least two prisms are combined. The light guide LG may also be a non-polarizing prism. That is, the light guide LG may not polarize the light emitted from the light sources 232a, 232b, and 232c.

[0226] The light guide LG may include at least two coating surfaces (reflective members or reflective sheets). One of the at least two coating surfaces may reflect light of a first wavelength and light of a second wavelength, and transmit light of a third wavelength. That is, the coating surface may reflect light of a predetermined wavelength band. As a result, light of a desired wavelength band may be reflected by the light guide LG for each of the lights emitted from the light sources 232a, 232b, and 232c. For example, light passing through the light guide LG may be provided to the outer lens LS.

[0227] The lens FL can be coupled to the light guide LG. The lens FL can be disposed adjacent to the light guide LG. For example, the lens FL can be in contact with the light guide. That is, the lens FL can be in contact with the light guide LG. Also, the light guide LG can be in contact with the lens FL.

[0228] The lens FL may be coupled to the light guide LG. In this case, the lens FL may be coupled to the light guide LG through a joining member or a coupling member. The joining member or the coupling member may be located between the lens FL and the light guide LG.

[0229] The lens FL is located on the outer surface of the light guide LG and may be at least one. For example, the number of lenses FL may correspond to the number of light sources of the light source unit 230 (described later). If the number of light sources is three, the number of lenses FL may also be three.

[0230] For example, the lens FL may include a first lens, a second lens, and a third lens corresponding to the light sources. The first lens may correspond to the first light source unit. The second lens may correspond to the second light source unit. The third lens may correspond to the third light source unit. That is, the first lens to the third lens may receive light emitted from the first light source unit to the third light source unit, respectively.

[0231] The second spacer SP2 may be located inside the barrel 210. For example, the second spacer SP2 may be larger than the light guide LG or the lens FL. The second spacer SP2 may be disposed outside the light guide LG and the lens FL. This prevents the light guide LG and the lens FL from detaching from the barrel 210. In other words, the second spacer SP2 can prevent the light guide LG and the lens FL from being separated from the barrel 210.

[0232] The housing 220 may be located outside the barrel 210. The housing 220 may surround the barrel 210. For example, the housing 220 may be disposed so as to surround at least a region of the barrel 210. The housing 220 may include a space for accommodating a light source. The housing 220 may also include at least one housing hole. The light source may be disposed in the housing hole. Light emitted from the light source may be provided to the lens FL and the light guide LG through the at least one housing hole. The housing 220 may be disposed outside the barrel 210 and may include a space for accommodating the barrel 210 and the light source unit 230.

[0233] There may be at least one light source unit 230. As described above, the following description will be based on three light source units. The light source unit 230 may include a first light source unit 230a, a second light source unit 230b, and a third light source unit 230c.

[0234] The first light source unit 230a may overlap with the outer lens LS in a second direction (Y-axis direction). The second direction (Y-axis direction) may correspond to the direction of light emitted from the optical device 200. That is, the second direction (Y-axis direction) may correspond to the direction in which light emitted from the light source device 220 is reflected by the light guide LG and emitted to the display unit.

[0235] The second light source unit 230b and the third light source unit 230c may be positioned to face each other, or the second light source unit 230b and the third light source unit 230c may be positioned to face each other.

[0236] The second light source unit 230b and the third light source unit 230c may overlap in a first direction (X-axis direction). The first direction (X-axis direction) may be perpendicular to the second direction (Y-axis direction). The third direction (Z-axis direction) may be perpendicular to the first and second directions.

[0237] The first light source unit 230a may be located in a region between the second light source unit 230b and the third light source unit 230c, and the directions of the light emitted from the second light source unit 230b and the third light source unit 230c may be opposite to each other.

[0238] Each light source unit may include a substrate 231a, 231b, or 231c, a light source 232a, 232b, or 232c, and an optical member 233a, 233b, or 233c.

[0239] Thus, the substrates 231a, 231b, 231c, the light sources 232a, 232b, 232c, and the optical members 233a, 233b, 233c may be positioned inward in this order, i.e., the optical members may be positioned adjacent to the substrates and light sources versus the light guide LG.

[0240] The substrates 231a, 231b, and 231c are connected to the light sources 232a, 232b, and 232c and can transmit electrical energy to the light sources 232a, 232b, and 232c so that the light sources 232a, 232b, and 232c can emit light.

[0241] The substrates 231 a , 231 b , and 231 c can be located on the outermost side of the housing 220 .

[0242] The substrates 231a, 231b, and 231c may include a first substrate 231a, a second substrate 231b, and a third substrate 231c. The first substrate 231a may overlap the light guide LG in the second direction (Y-axis direction). The second substrate 231b and the third substrate 231c may overlap in the first direction (X-axis direction). The second substrate 231b and the third substrate 231c may be positioned to face each other in the housing 220. The first substrate 231a may be positioned in the region between the second substrate 231b and the third substrate 231c.

[0243] The light sources 232a, 232b, and 232c may emit light. For example, the light emitted from the light sources 232a, 232b, and 232c may enter a light guide LG in the housing 222. The light guide LG may be located within the housing 222.

[0244] The light sources 232a, 232b, and 232c may be one or more, and may include a first light source 232a, a second light source 232b, and a third light source 232c. The light sources 232a, 232b, and 232c may be disposed on each substrate.

[0245] That is, the light source device 220 may include a single light source 232a, 232b, and 232c or multiple light sources. For example, the light sources 232a, 232b, and 232c may be multiple and include a first light source 232a, a second light source 232b, and a third light source 232c. The first light source 232a to the third light source 232c may emit light in the same direction or in different directions. For example, the second light source 232b and the third light source 232c may be positioned opposite each other. The second light source 232b and the third light source 232c may be positioned to overlap in the first direction (X-axis direction). In addition, a light guide LG may be positioned between the second light source 232b and the third light source 232c. As a result, the light guide LG may overlap the second light source 232b and the third light source 232c.

[0246] The first light source 232a to the third light source 232c can emit light toward the light guide LG. The first light source 232a can overlap with the light guide LG in the second direction. With this configuration, the optical device 200 can have a compact light source device 220.

[0247] In addition, the first light source 232a, the second light source 232b, and the third light source 232c may emit light of wavelengths or colors that are partially the same or different from each other. For example, the first light source 232a, the second light source 232b, and the third light source 232c may emit red, green, and blue light, respectively.

[0248] There may be at least one optical member 233a, 233b, or 233c. The optical members 233a, 233b, and 233c may include a first optical member 233a, a second optical member 233b, and a third optical member 233c corresponding to the first light source 232a, the second light source 232b, and the third light source 232c, respectively. The first optical member 233a, the second optical member 233b, and the third optical member 233c may include a filter. The first optical member 233a, the second optical member 233b, and the third optical member 233c may also include glass. The first optical member 233a, the second optical member 233b, and the third optical member 233c may filter light. Alternatively, the first optical member 233a, the second optical member 233b, and the third optical member 233c may quickly block foreign matter from entering the light source, thereby protecting the light source.

[0249] The additional housing 240 may be disposed outside the barrel 210 to surround the barrel 210. The barrel 210 may be coupled to the housing 220 using various coupling methods, and the additional housing 240 may be coupled to the housing 220. The additional housing 240 may also be coupled to the barrel 210. Accordingly, the optical device 200 according to this embodiment may provide improved reliability.

[0250] FIG. 9 is a perspective view of a barrel in an optical device according to one embodiment, FIG. 10 is a side view of a barrel in an optical device according to one embodiment, and FIG. 11 is a bottom view of a barrel in an optical device according to one embodiment with a light guide inserted therein.

[0251] 9 to 11, in the optical device according to the embodiment, the barrel 210 may include the first groove 210h1 and the second groove 210h2 as described above. The first groove 210h1 and the second groove 210h2 may overlap in the second direction (Y-axis direction). Furthermore, the second groove 210h2 and the first groove 210h1 may be arranged in sequence along the second direction (Y-axis direction).

[0252] An outer lens may be disposed in the first groove 210h1, and a light guide may be disposed in the second groove 210h2.

[0253] The first groove 210h1 and the second groove 210h2 may be spaced apart in the second direction (Y-axis direction). The first groove 210h1 and the second groove 210h2 may be connected to each other through a through-hole, as described above. This allows light reflected by the light guide in the second groove 210h2 to be provided to the outer lens in the first groove 210h1 and ultimately emitted to the display unit.

[0254] The barrel 210 may include a protrusion 210p extending outward. The protrusion 210p may include a coupling hole 210ph. The barrel 210 may be coupled to a housing through the coupling hole 210ph.

[0255] The barrel 210 may include a plurality of barrel holes so that light emitted from a plurality of light sources can be provided to the light guide. The number of barrel holes may correspond to the number of light sources. For example, the barrel holes may include a first barrel hole 210h2a, a second barrel hole 210h2b, and a third barrel hole 210h2c. The first barrel hole 210h2a, the second barrel hole 210h2b, and the third barrel hole 210h2c may be arranged on a side surface of the barrel 210.

[0256] The first barrel hole 210h2a may overlap the light guide along the second direction. The second barrel hole 210h2b and the third barrel hole 210h2c may be spaced apart from each other in the first direction (X-axis direction). The second barrel hole 210h2b and the third barrel hole 210h2c may overlap each other in the first direction (X-axis direction). The first barrel hole 210h2a may be located between the second barrel hole 210h2b and the third barrel hole 210h2c.

[0257] In addition, the first barrel hole 210h2a, the second barrel hole 210h2b, and the third barrel hole 210h2c may be connected to the second groove 210h2, i.e., the first barrel hole 210h2a, the second barrel hole 210h2b, and the third barrel hole 210h2c may overlap with the light guide in the first direction or the second direction.

[0258] The second barrel hole 210h2b and the third barrel hole 210h2c may include grip grooves gr formed on their edges. This allows the lenses (e.g., the second and third lenses) adjacent to the second barrel hole 210h2b and the third barrel hole 210h2c to easily contact the light guide after the light guide is accommodated in the second groove 210h2. For example, by positioning a gripper or the like in the grip grooves gr, the lenses can be easily attached to the outer surface of the light guide.

[0259] The protrusion 210p may extend outward from the outer surface of the barrel 210 other than the outer surface where the second barrel hole 210h2b and the third barrel hole 210h2c are located, thereby improving the reliability of the barrel and facilitating the manufacture of the barrel.

[0260] In addition, the barrel 210 may include a barrel groove 210gr. The inner surface of the second groove 210h2 in the barrel 210 may include a barrel groove 210hr that bulges outward, thereby allowing the second spacer to easily contact the inner surface of the barrel 210.

[0261] In addition, the size S2 of the second groove 210h2 in the barrel 210 may be larger than the size S1 of the light guide LG. This allows for easy alignment of the light with respect to the light guide LG. The sizes will be described below based on the XZ plane.

[0262] The barrel 210 may also include a barrel protrusion 210pr protruding from its inner surface toward the light guide LG. The barrel protrusion 210pr may overlap the second barrel hole 210h2b and the third barrel hole 210h2c in the first direction (X-axis direction).

[0263] The barrel protrusion 210pr may contact the light guide LG. In this case, the size S1 of the light guide LG may be larger than the size S3 of the barrel protrusion 210pr. Alternatively, the size S3 of the barrel protrusion 210pr may be smaller than the size S1 of the light guide LG. As a result, even when the light guide LG is mounted in the barrel 210 and contacts the barrel protrusion 210pr, the light guide LG does not contact the inner surface of the barrel 210. In other words, contact between the light guide LG and the inner surface of the barrel 210 is reduced, thereby suppressing damage to the light guide LG. In other words, the reliability of the barrel 210 and the optical device may be improved.

[0264] Figure 12 is a diagram explaining the connection of an outer lens, a first spacer, a light guide, a lens, and a second spacer as a barrel in an optical device according to one embodiment, Figure 13 is a diagram explaining the connection between a barrel, a housing, and an additional housing in an optical device according to one embodiment, and Figure 14 is a diagram explaining the connection between a housing and a light source unit in an optical device according to one embodiment.

[0265] 12 to 14, an outer lens LS may be inserted into a first groove 210h1 of the barrel 210. A first spacer SP1 may be positioned outside the outer lens LS in the first groove 210h1 of the barrel 210. The first spacer SP1 contacts the outer lens LS and, as described above, can prevent the outer lens LS from being separated.

[0266] The light guide LG and the lenses FL1, FL2, and FL3 connected to the light guide LG can be inserted into the second groove 210h2. The light guide LG and the lenses FL1, FL2, and FL3 connected to the light guide LG can be positioned within the second groove 210h2. A second spacer SP2 can be positioned outside the light guide LG and the lenses FL1, FL2, and FL3 connected to the light guide LG. The second spacer SP2 can contact the light guide LG or the lenses (especially the first lens FL1). This can prevent the light guide LG and the lenses FL1, FL2, and FL3 connected to the light guide LG from being separated.

[0267] The first spacer SP1 and the second spacer SP2 may be sequentially arranged along the second direction (Y-axis direction). The first spacer SP1 and the second spacer SP2 may overlap along the second direction (Y-axis direction). The outer lens LS, the light guide LG, and the first lens FL1 may be positioned between the first spacer SP1 and the second spacer SP2. Thus, the first spacer SP1 and the second spacer SP2 may overlap with the outer lens LS, the light guide LG, and the first lens FL1 in the second direction (Y-axis direction).

[0268] The barrel 210 may be inserted into the housing 220. That is, the barrel 210 may be positioned in a receiving hole of the housing 220. The housing 220 and the barrel 210 may be coupled to each other in various coupling methods. For example, a protrusion of the housing 220 may be coupled to a coupling hole of the barrel 210. The housing 220 may be positioned below the barrel 210, and the additional housing 240 may be positioned above the barrel 210. The additional housing 240 may allow the barrel 210 to maintain an improved coupling force with the housing 220.

[0269] After the barrel 210 is accommodated in the housing 220, a plurality of light sources may be inserted into the side of the housing 220. For example, a first light source 230a, a second light source 230b, and a third light source 230c may be positioned on the side of the housing 220.

[0270] FIG. 15 is a view taken along line AA' in FIG. 7, and FIG. 16 is an enlarged view of the K1 portion in FIG.

[0271] 15 and 16, in the optical device 200 according to the embodiment, the distance L1 between the light guide LG and the lens FL (e.g., the first lens) may be smaller than the distance L2 between the light source (e.g., the first light source 232a) and the lens FL (e.g., the first lens). That is, the lens FL may be positioned closer to the light guide LG than to the light source. This configuration may reduce the distance L2 between the lens FL and the light source, or the back focal length. This may allow for a more compact optical device.

[0272] Furthermore, the distance L2 between the lens FL and the light source may be shorter than the length L3 of the light guide LG, which can further effectively reduce the size of the optical device.

[0273] A second spacer SP2 may be located between the first lens FL1 and the first light source 232a. The size or length L5 of the second spacer SP2 may be greater than the size or length L4 of the light guide LG. The size or length L5 of the second spacer SP2 may be less than the sum L6 of the size or length L4 of the light guide LG and the sizes or lengths of the lenses FL2 and FL3.

[0274] As a result, the light guide and one lens can be easily inserted into the barrel 210 in a joined state through the hole on one side of the barrel 210. As a result, alignment of the optical axis in the second direction can be easily performed in a joined state of the light guide and the first lens.

[0275] In turn, a plurality of lenses FL1, FL2, FL3 may be coupled to the outer surface of the light guide LG and bulge towards each of the light sources 232a, 232b, 232c.

[0276] For example, the first lens FL1 may be convex toward the first light source 232a, the second lens FL2 may be convex toward the second light source 232b, and the third lens FL3 may be convex toward the third light source 232c. With this configuration, light emitted from each light source can be concentrated through the lenses FL1, FL2, and FL3 and provided to the light guide LG. This can improve light efficiency.

[0277] The lenses FL1, FL2, and FL3 may be coupled to the light guide LG via a bonding or coupling member. The refractive indexes of the lenses FL1, FL2, and FL3 may be the same as or different from the refractive index of the light guide LG. For example, the refractive index of the lenses FL1, FL2, and FL3 may be 1.3 or greater, and the refractive index of the light guide LG may be 1.5.

[0278] Furthermore, the light beams La, Lb, and Lc emitted from the light sources 232a, 232b, and 232c may enter the light guide LG. The first light beam La, the second light beam Lb, and the third light beam Lc emitted from the first light source 232a to the third light source 232b, respectively, may be emitted in the same direction from the light guide LG.

[0279] For example, the light guide LG may include at least one coating surface. As described above, one of the coating surfaces may reflect a portion of light having a first wavelength, a second wavelength, or a third wavelength. For example, the first wavelength may include a red wavelength band, the second wavelength may include a green wavelength band, and the third wavelength may include a blue wavelength band.

[0280] FIG. 17 is a bottom view of a barrel, a light guide, and a lens in an optical device according to an embodiment, and FIG. 18 is a view of FIG. 17 further including a second spacer.

[0281] 17 and 18, a gap may exist between the inner surface of the barrel 210 and the light guide LG. That is, the inner surface of the barrel 210 may be spaced apart from the light guide LG by a first gap. This allows the light guide LG and the lens FL connected to the light guide LG to be easily tilted. That is, alignment of the optical axis may be easily performed. Furthermore, flare may be suppressed by the lens.

[0282] Additionally, a second spacer SP2 can surround the first lens FL1 within the barrel 210. The second spacer SP2 can contact the barrel groove 210gr, so that the light guide LG and the lens FL surrounded by the spacer SP2 can be prevented from detaching from the barrel 210.

[0283] The lens FL may be smaller than the light guide LG. This allows the lens FL and the light guide LG to be easily connected. Furthermore, the first lens FL1 does not protrude beyond the second spacer SP2. That is, the first lens FL1 can be positioned inside the second spacer SP2.

[0284] FIG. 19 is a cross-sectional view of an optical device according to another embodiment.

[0285] Referring to FIG. 19, the contents of the optical device according to other embodiments may be the same as those of the outer lens LS, barrel 210, housing 220, light source unit 230, light guide LG, lens FL, additional housing 240, first spacer SP1, and second spacer SP2, except for the contents described below.

[0286] In other embodiments of the optical device, the size L5' of the second spacer SP2 may be larger than the sum L6 of the size of the lens and the size of the light guide LG. This allows the light guide LG to be inserted into the barrel 210 with multiple lenses all connected to it. In other words, assembly between the light guide LG, lens FL, and barrel 210 can be easily performed.

[0287] 20 is a conceptual diagram of an optical device according to yet another embodiment, FIG. 21 is a perspective view of an optical device according to yet another embodiment, FIG. 22 is an exploded perspective view of an optical device according to yet another embodiment, FIG. 23 is a view taken along line BB' in FIG. 21, FIG. 24 is an enlarged view of portion K1 in FIG. 23, and FIGS. 25 and 26 are enlarged views of portion K2 in FIG. 23.

[0288] 20 to 23, an optical device 400 according to yet another embodiment includes a barrel 410, a lens L, and a first light guide LG1. The optical device 400 may further include a light source device 420 located in or coupled to an opening OP formed in a side surface of the barrel 410, and an optical signal generating unit 430 adjacent to the barrel 410. The optical device 400 may further include a cover CV and a substrate (including a connector, not shown) that enclose the barrel 410, the light source device 420, and the optical signal generating unit 430.

[0289] There may be a plurality of lenses L. For example, the lens L may include a plurality of lenses arranged in order based on the top of the barrel 410. For example, the lens L may include a first lens L1 arranged first on the top, a second lens L2 arranged at the rear end of the first lens, and an Nth lens Ln arranged last on the top. Here, N is a natural number and may be 2 or greater. The Nth lens Ln may be positioned closest to the optical signal generator 430, which is located at the rear end of the barrel 410 or at the rear end of the plurality of lenses L, among the plurality of lenses L.

[0290] In addition, in the embodiment of the present invention, the first direction (X-axis direction) may correspond to the optical axis. The first direction (X-axis direction) may correspond to the direction in which light emitted from the light source device 420 is reflected by the optical signal generator 430 and emitted to the display unit. The second direction (Y-axis direction) is a direction perpendicular to the first direction (Y-axis direction). The second direction (Y-axis direction) may correspond to the direction from the first light guide LG1 to the opening OP. Hereinafter, in the specification and the present embodiment, the second direction (Y-axis direction) may correspond to the direction from the first light guide LG1 to the third light guide LG2. The first light guide LG1 may be referred to as a first light guide portion or a first guide member. The third light guide LG2 may be referred to as a third light guide portion or a second guide member.

[0291] The barrel 410 may further include a hole corresponding to the opening OP. As an example, the barrel 410 may include a barrel hole or an additional hole 410h. The additional hole 410h may be positioned to face the opening OP. Alternatively, the additional hole 410h may overlap the opening OP in the second direction (Y-axis direction). Alternatively, the distance of the additional hole 410h from the Nth lens Ln in the first direction may be the same as the distance between the opening OP and the Nth lens Ln. Alternatively, the additional hole 410h may be positioned in a region corresponding to the position of the opening OP on the inner surface of the barrel 410. With this configuration, a bonding material can be easily applied to the light source device 420 coupled, inserted, fixed, or connected to the opening OP through the additional hole 410h. This improves the bonding strength between the barrel 410 and the light source device 420. Therefore, the optical device 400 according to this embodiment may have improved durability, durability, or reliability. Alternatively, optical testing of the light source device 420 positioned at the opening OP may be easily performed through the additional hole 410h. Alternatively, the additional holes 410h may facilitate the discharge or ejection of fluid (e.g., air) from the barrel 410 and the light source device 400. The presence or absence of the additional holes 410h may vary depending on the embodiment. For example, the additional holes 410h may be disposed on the side of the barrel 410 as described above. Alternatively, the additional holes 410h may not be present on the side of the barrel 410 in consideration of durability, etc.

[0292] A plurality of lenses L may be positioned within the barrel 410. Also, a first light guide LG1 may be positioned within the barrel 410.

[0293] The barrel 410 according to the embodiment may include an opening OP formed on a side surface thereof. The opening OP may have various shapes such as a circle, a polygon, etc. The opening OP may correspond to the position of the first light guide LG1.

[0294] In an embodiment, the opening OP may overlap the first light guide LG1 in a direction perpendicular to the optical axis. With this configuration, light emitted from the light source device 420 located at the side of the barrel 410 can easily enter the first light guide LG1.

[0295] The first light guide LG1 may be disposed between two of the lenses. For example, the first light guide LG1 may be disposed between the first lens L1 and the Nth lens Ln. The first light guide LG1 may also be disposed between the first lens L1 and the optical signal generator 430. The first light guide LG1 may also be disposed between the first lens L1 and the second lens L2 or between the second lens L2 and the Nth lens Ln. Various positions of the first light guide LG1 will be described in various embodiments below.

[0296] In this embodiment, the first light guide LG1 may be located between the second lens L2 and the Nth lens Ln. Accordingly, the Nth lens Ln may be located between the first light guide LG1 and the optical signal generator 430. With this configuration, an appropriate optical path may be ensured when light reflected by the first light guide LG1 is provided to the optical signal generator 430. In addition, the reflected light may be refracted. This may allow the first light guide LG1 to be miniaturized.

[0297] The first light guide LG1 may include a first prism, which may be a polarizing prism, a polarization separating prism, or a polarization separating member.

[0298] The first prism may reflect a first polarized light and transmit a second polarized light. For example, a portion of the light (first polarized light) provided from the light source device 420 or incident on the first light guide LG1 may be reflected by the first light guide LG1 and provided to the optical signal generator 430. Another portion of the light (second polarized light) incident on the first light guide LG1 may be transmitted through the first light guide LG1 and absorbed by the barrel 410.

[0299] Light emitted from the light source device 420 may enter the first light guide LG1 through the opening OP. To this end, as described above, the opening OP may be disposed in the area where the first light guide LG1 is located. For example, the incident surface of the first light guide LG1 may be positioned to face the opening OP. Alternatively, the position of the first light guide LG1 in the barrel 410 may be the same as that of the first light guide LG1.

[0300] The light source device 420 may generate (generate, provide) or emit light including a light source 423. The light source device 420 according to the embodiment may be located at or coupled to the opening OP. That is, the light source device 420 may be connected to or coupled to the barrel 410.

[0301] The light source device 420 may include a housing 422 including an opening 422h, a third light guide LG2 disposed within the housing 4220, a light source 423 that provides light to the third light guide LG2, and a second light guide PR disposed between the first light guide LG1 and the light source 423.

[0302] In turn, the light source device 420 may include a light source assembly 421 disposed outside the light source device 420 and surrounding a housing 422 , a light source lens 424 adjacent to the light source 423 , and an intermediate lens MO located within the housing 422 .

[0303] The light source assembly 421 may be disposed at the outermost position of the light source device 420. If it is difficult to mount the light source 423 inside the housing 422 or if an additional lens (light source lens) needs to be mounted, the light source assembly 421 may be located outside the housing 422. The light source assembly 421 may be integral with or separated from the housing 422.

[0304] The housing 422 may include an opening 422h. The housing 422 may be positioned adjacent to the opening OP of the barrel 410. For example, the opening 422h of the housing 422 may be positioned corresponding to the opening OP of the barrel 410. As a result, the opening 422h of the housing 422 may overlap with the opening OP of the barrel 410 in the second direction (the Y-axis direction).

[0305] The light source 423 may be located within the housing 422 or the light source assembly 421. The light source 423 may emit light. For example, the light emitted from the light source 423 may be incident on the third light guide LG2 within the housing 422. The third light guide LG2 may be located within the housing 422. The third light guide LG2 may be located between the light source 423 and the first light guide LG1. Thus, the third light guide LG2 may transmit the light emitted from the light source 423 to the opening 422h or the first light guide LG1.

[0306] The light source 423 may be one or more. That is, the light source device 420 may have a single light source 423 or multiple light sources 423. For example, the light source 423 may be multiple and may include a first light source 423a, a second light source 423b, and a third light source 423c. The first light source 423a to the third light source 423c may emit light in the same direction or in different directions. For example, the first light source 423a and the third light source 423c may be positioned to face each other. The first light source 423a and the third light source 423c may be positioned to overlap in the first direction (X-axis direction). The third light guide LG2 may be positioned between the first light source 423a and the third light source 423c. Accordingly, the third light guide LG2 may overlap the first light source 423a and the third light source 423c. The second light source 423b may be positioned between the first light source 423a and the third light source 423c. The first light source 423a to the third light source 423c can emit light toward the third light guide LG2. The second light source 423b can overlap with the third light guide LG2 in the second direction. With this configuration, the optical device 400 can have a compact light source device 420.

[0307] In addition, the first light source 423a, the second light source 423b, and the third light source 423c may emit light of wavelengths or colors that are partially the same or different from each other. For example, the first light source 423a, the second light source 423b, and the third light source 423c may emit red, green, and blue light, respectively.

[0308] The third light guide LG2 may include a second prism. The second prism may include, for example, an X-prism as a reflective member. As an example, the third light guide LG2 or the second prism may have a structure in which at least two prisms are combined. Also, the third light guide LG2 may be a non-polarizing prism. That is, the third light guide LG2 does not need to polarize the light emitted from the light source 423.

[0309] The second prism may include at least two or more coating surfaces (reflective members or reflective sheets). One of the at least two or more coating surfaces may reflect light of a first wavelength and light of a second wavelength, and transmit light of a third wavelength. That is, the coating surface may reflect light of a predetermined wavelength band. As a result, light of a desired wavelength band may be reflected by the third light guide LG2 for each of the lights emitted from the plurality of light sources 423. For example, light passing through the third light guide LG2 may be provided to the first light guide LG1 or the intermediate lens MO.

[0310] The light source lens 424 may be located adjacent to the light source 423. For example, there may be a plurality of light source lenses 424. The light source lens 424 may be located on the path of light emitted from each light source 423.

[0311] As an example, the light source lens 424 may be located between the third light guide LG2 and the light source 423. Also, there may be a plurality of light source lenses 424. A plurality of light source lenses 424 may be located between the third light guide LG2 and the light source 423. Alternatively, there may be a plurality of light source lenses 424 corresponding to each of the plurality of light sources 423.

[0312] For example, the light source lens 424 may include a first light source lens 424a, a second light source lens 424b, and a third light source lens 424c. The first light source lens 424a may be located between the first light source 423a and the third light guide LG2. The second light source lens 424b may be located between the second light source 423b and the third light guide LG2. The third light source lens 424c may be located between the third light source 423c and the third light guide LG2.

[0313] Furthermore, a plurality of first light source lenses 424a, second light source lenses 424b, and third light source lenses 424c may be located on the first light source 423a, second light source 423b, and third light source 423c, respectively. For example, one of the plurality of first light source lenses 424a may be located on the first light source 423a and coupled to the light source assembly 421. Another of the plurality of first light source lenses 424a may be located between one of the first light source lenses 424a and the third light guide LG2 and coupled to the housing 422.

[0314] The first light source lens 424a, the second light source lens 424b, and the third light source lens 424c may include a collimator.

[0315] Furthermore, the light source assembly 421 may include a substrate 425 connected to the light source 423. There may be at least one substrate 425 corresponding to the light source 423. For example, the plurality of substrates 425 may include a first substrate 425a, a second substrate 425b, and a third substrate 425c. As described above, the plurality of substrates 425 may be a single substrate, or there may be a plurality of substrates corresponding to the number of light sources.

[0316] In addition, the board 425 may be electrically connected to the control unit or processor in the frame (or display unit). Accordingly, the board 425 may include a connector for communication with an external device or a connected device. Furthermore, the board 425 is disposed outside the light source 423 and can discharge heat generated by the light source to the outside. This can improve the reliability of the light source device 420.

[0317] The intermediate lens MO may be located between the opening 422h and the third light guide LG2, and the intermediate lens MO may be located between the first light guide LG1 and the third light guide LG2.

[0318] The intermediate lens MO may include multiple lenses, such as a first intermediate lens MO1 and a second intermediate lens MO2, although, as will be described later, the light reflected by the third light guide LG2 may be provided directly to the first light guide LG1 without the intermediate lens MO.

[0319] The first intermediate lens MO1 may include a first surface MO1s1 adjacent to the first light guide LG1 and a second surface MO1s2 corresponding to the first surface MO1s1. Light emitted from the light source 423 passes through the third light guide LG2 and sequentially passes through the second surfaces MO1s2 and MO1s1.

[0320] The second surface MO1s2 may be convex toward the third light guide LG2. Alternatively, the second surface MO1s2 may be concave toward the first light guide LG1. Consequently, the first surface MO1s1 may be convex or concave toward the third light guide LG2. For example, the first intermediate lens MO1 may have a meniscus shape. Since the second surface MO1s2 is convex toward the third light guide LG2, light may be concentrated after passing through the intermediate lens MO. Accordingly, the uniformity of light provided to the optical signal generator 430 may be improved. In other words, the light incident on the optical signal generator 430 may be surface light. The uniformity of the surface light may be improved. Accordingly, the accuracy or resolution of the video signal or image output to the display unit through the optical device 400 according to the embodiment may be improved.

[0321] The second middle lens MO2 may include a microlens array MLA, which may partially planarize the light passing through the third light guide LG2.

[0322] Therefore, the second intermediate lens MO2 may be different in size from the third light guide LG2. Also, the first intermediate lens MO1 may be different in size from the third light guide LG2. For example, the intermediate lens MO2 may be larger than the third light guide LG2.

[0323] Furthermore, the positions of the lenses L, the intermediate lens MO, and the light source lens 424 may be maintained by spacers SP. For example, a plurality of spacers SP may be present adjacent to the lenses L within the barrel 410. Also, a plurality of spacers SP may be disposed adjacent to the intermediate lens MO and the light source lens 424 in the housing 422 of the light source device 420 or the light source assembly 421. As an example, the plurality of spacers SP may be disposed above or below the aforementioned lenses to fix or maintain the positions of the lenses.

[0324] The second light guide PR may be located within the light source device 420. The second light guide PR may be located between the first light guide LG1 and the light source 423. The second light guide PR may be a polarizing reflector. The second light guide PR may reflect a specific light. The second light guide PR may only polarize light, pass polarized light, or refract light. That is, the second light guide PR may correspond to a lens. The second light guide PR may be combined with a third light guide (described later), and the third light guide may perform the functions of the second light guide (e.g., reflecting specific light, polarizing light, passing polarized light, refracting light, etc.).

[0325] In addition, the second light guide PR is located at the front end of the first light guide LG1 and can reflect polarized light. For example, the second light guide PR can reflect light transmitted through the first light guide LG1. The second light guide PR can transmit light having a polarization angle corresponding to or the same as that of light reflected from the first light guide LG1 and directed toward the optical signal generator 430. In other words, the second light guide PR can transmit light having a polarization angle corresponding to the light reflected from the first light guide LG1, and can reflect light having a polarization angle corresponding to the light transmitted from the first light guide LG1. With this configuration, the light source device or optical device according to this embodiment can provide improved optical efficiency.

[0326] As an example, the second light guide PR may be located between the first light guide LG1 and the lens (intermediate lens or light source lens). This may improve light efficiency by utilizing birefringence occurring in the lens (intermediate lens or light source lens). In other words, light reflected by the second light guide PR may be birefringent, phase retarded, or polarized by the lens (intermediate lens or light source lens). In this way, light polarized through the lens (intermediate lens or light source lens) may be transmitted through the second light guide PR. For example, at least a portion of light polarized through the lens (intermediate lens or light source lens) may be transmitted through the second light guide PR. This may improve the light efficiency of the light source device or optical device.

[0327] Therefore, the light source 423 can emit unpolarized light. The second light guide PR can reflect the light from the light source 423. The lens can also delay the phase of the light. As a result, the path of the light is not changed, so the position or path of the light emitted from the optical device is not changed by the second light guide PR. In other words, phenomena such as afterimages can be suppressed.

[0328] The optical signal generating unit 430 may be located at the rear end of the barrel 410. The optical signal generating unit 430 may overlap the lens L in the optical axis direction or the first direction (X-axis direction).

[0329] The optical signal generator 430 can convert the light that is incident on the first light guide LG1, reflected, and then passes through the Nth lens into an optical signal containing image information.

[0330] The optical signal generator 430 may reflect the light (first polarization) reflected by the first light guide LG1. The optical signal generator 430 may generate an optical signal containing image information. That is, the light reflected by the optical signal generator 430 may be light containing image information.

[0331] The optical signal generator 430 may include a liquid crystal on silicon (LCoS) display.

[0332] A silicon LCD device can have a structure in which liquid crystal is placed between a silicon wafer (a thin disk that is the material for semiconductors) with a CMOS (Complementary Metal-Oxide Semiconductor) array and an anti-reflection (AR) member coated with a transparent electrode (Indium Tin Oxide, ITO).

[0333] An alignment layer is formed on the wafer (silicon wafer) to form an initial liquid crystal alignment.

[0334] Furthermore, a reflective layer or reflective electrode formed of an aluminum layer and having high optical reflectivity can be located below the alignment layer. The reflective electrode can be located on a silicon wafer. A semiconductor array (CMOS array) can be formed on the silicon wafer. Data signals can be transmitted through the panel using this semiconductor array.

[0335] The optical signal generator 430 can reflect at least a portion of the incident light when driven. The optical signal generator 430 can reflect the light incident on the surface light source pixel by pixel. The intensity of the reflected light can also be adjusted depending on the degree of modulation. For example, the optical signal generator 430 can partially modulate a first polarized light into a second polarized light. As a result, the light modulated into the second polarized light can be provided to the display unit through the first light guide LG1 and the first lens L1.

[0336] That is, the optical signal generator 430 can modulate the retardation of modulated light, i.e., polarized light. The optical signal generator 430 can perform retardation for the first polarized light in various ways. That is, the voltage for each pixel (adjusting the voltage of the electrodes) can be adjusted to form an electric field. The degree of twist of the liquid crystal can also be adjusted according to the adjusted voltage. For example, at maximum voltage, all of the light reflected by the optical signal generator 430 can be reflected by the first light guide LG1. At minimum voltage, all of the light reflected by the optical signal generator 430 can be transmitted through the third light guide LG1. However, the opposite behavior can also occur depending on the electric field. Also, when an intermediate voltage is applied, some of the light can be transmitted through the first light guide LG1. That is, the intensity (e.g., brightness) of the light provided to the display unit can be intermediate.

[0337] In this manner, the optical signal generated by the optical signal generator 430 can be transmitted to the first lens L1 through the Nth lens Ln and the first light guide LG1, and at least a portion of the optical signal generated by the optical signal generator 430 can pass through the first lens L1 and enter the display unit.

[0338] Additionally, a transparent member 440 may be further disposed between the optical signal generating unit 430 and the Nth lens Ln (or the first light guide). The transparent member 440 may be made of glass. The transparent member 440 may be combined with the barrel 410 or the cover CV. The transparent member 440 may be positioned on the optical signal generating unit 430. This may easily prevent foreign matter from entering the optical signal generating unit 430. The transparent member 440 may be the same size as or different from the optical signal generating unit 430. The transparent member 440 may overlap at least a portion of the optical signal generating unit 430 in the optical axis direction or the first direction (X-axis direction).

[0339] 24a in more detail, the light beams La, Lb, and Lc emitted from the light sources 423 of the light source device 420 can pass through the light source lens 424, the third light guide LG2, and the intermediate lens MO. For example, the first light beam La, the second light beam Lb, and the third light beam Lc emitted from the first light source 423a to the third light source 423b, respectively, can be emitted in the same direction from the third light guide LG2.

[0340] For example, the third light guide LG2 may include a first coating surface LG2a and a second coating surface LG2b. As described above, one of the at least two coating surfaces may reflect a portion of light of a first wavelength, a second wavelength, or a third wavelength. For example, the first wavelength may include a red wavelength band, the second wavelength may include a green wavelength band, and the third wavelength may include a blue wavelength band.

[0341] Furthermore, the first coating surface LG2a can reflect the first light La or the light of the first wavelength. That is, the first coating surface LG2a can transmit the second light Lb and the third light Lc. In other words, the first coating surface LG2a can transmit the light of the second wavelength and the light of the third wavelength.

[0342] The second coating surface LG2b can reflect the second light Lb or the light of the second wavelength. That is, the second coating surface LG2b can transmit the first light La and the third light Lc. In other words, the second coating surface LG2b can transmit the light of the first wavelength and the light of the third wavelength.

[0343] As a result, in the third light guide LG2, the first light La can be reflected by or incident on the intermediate lens MO or the opening OP. In the third light guide LG2, the second light Lb can be reflected by or incident on the intermediate lens MO or the opening OP. In the third light guide LG2, the third light Lc can be reflected by or incident on the intermediate lens MO or the opening OP.

[0344] As a result, the light (IL or La, Lb, Lc) emitted from the light source 423 can be incident on the first light guide LG. At this time, the light incident on the first light guide LG can be the first incident light IL.

[0345] 25, the first incident light IL may be partially reflected and partially transmitted by the first light guide LG1. That is, the first light guide LG1 may reflect the first polarization ILa of the first incident light IL and transmit the second polarization ILb. For example, the first polarization ILa and the second polarization ILb may be different S / P light. As a result, the first polarization ILa, which is a part of the first incident light IL, may be provided to the optical signal generator 430 through the Nth lens Ln. Then, the second polarization ILb may be absorbed by the barrel 410 or provided to the additional hole 410h.

[0346] In this case, the light source device or optical device according to the embodiment includes a second light guide PR, and the second polarized light ILb may be reflected by the second light guide PR. For example, the second polarized light ILb may be at least partially reflected by the second light guide PR. In other words, the amount of the second polarized light ILb transmitted through the first light guide LG1 may be reduced by the second light guide PR, and the amount of the first reflected polarized light ILaa (described later) may be increased. That is, the optical efficiency of the optical device 400 may be improved.

[0347] 26, as described above, the optical signal generating unit 430 can reflect the first polarized light ILa by adjusting the voltage. In the embodiment, the first polarized light ILa reflected by the optical signal generating unit 430 will be hereinafter referred to as reflected polarized light.

[0348] As described above, the first light guide LG1 can reflect at least a portion of the incident light or light IL emitted from the light source 423 and entering the first light guide at the Nth lens (or optical signal generator). That is, the reflected polarized light can be at least partially reflected by the first light guide LG1. However, as described above, the reflected polarized light can be entirely reflected or transmitted by the first light guide LG1 depending on the voltage applied by the optical signal generator 430. The following description will be based on the assumption that the reflected polarized light is at least partially transmitted by the first light guide LG1.

[0349] The reflective polarized light may include a first reflective polarized light ILaa transmitted through the first light guide LG1 and a second reflective polarized light ILab reflected by the first light guide LG1. As described above, the intensity of the first reflective polarized light ILaa, i.e., the degree of transmission of the reflective polarized light, may be adjusted in response to an image provided to the display unit.

[0350] The second reflected polarized light ILab can be transmitted through the second light guide PR. The second reflected polarized light ILab can be polarized at a predetermined angle through a lens (intermediate lens or light source lens). As a result, the second reflected polarized light ILab can be partially polarized and reflected by the lens (intermediate lens or light source lens) and then travel back to the second light guide PR. At this time, the polarized second reflected polarized light ILab can be transmitted through the second light guide PR and reflected by the first light guide LG1. This can further improve light efficiency.

[0351] Furthermore, the optical device 400 according to the embodiment may further include a display unit disposed in front of the first lens L1 to display an image based on an optical signal including image information transmitted to the first lens L1. In other words, the optical device 400 may be integrated with the display unit. However, the following description will be given assuming that the optical device 400 is separated from the display unit.

[0352] 25b, barrel 410 may further include an additional hole 410h on a side surface thereof. For example, a second polarization may be provided in additional hole 410h. The following description of the modification may be the same as that of the other embodiments described above.

[0353] FIG. 27a is a cross-sectional view of a light source device that is an optical device according to yet another embodiment, FIG. 27b is a modified example of FIG. 27a, FIG. 27c is another modified example of FIG. 27a, and FIG. 27d is yet another modified example of FIG. 27a.

[0354] The descriptions of the optical devices and components of the optical devices according to the above-described embodiments may be applied in the same manner, except for the descriptions of various embodiments and modifications described below.

[0355] Referring to FIG. 27a, as described above, the second light guide PR may be located within the light source device 420. The second light guide PR may be located between the first light guide LG1 and the light source 423. The second light guide PR may be located at the front end of the first light guide LG1 and may reflect polarized light. For example, the second light guide PR may reflect light transmitted through the first light guide LG1. The second light guide PR may transmit light having a polarization angle corresponding to or identical to the polarization angle of light reflected from the first light guide LG1 and directed toward the optical signal generator 430. In other words, the second light guide PR may transmit light having a polarization angle corresponding to the reflected light of the light incident on the first light guide LG1, and may reflect light having a polarization angle corresponding to the transmitted light of the light incident on the first light guide LG1. With this configuration, the light source device or optical device according to this embodiment may provide improved optical efficiency.

[0356] Further, in this embodiment, the second light guide PR may be located between the first light guide LG1 and the lens (intermediate lens or light source lens). In this case, the second light guide PR may be in contact with the lens. For example, one surface of the second light guide PR may be in contact with the lens. In an embodiment, the second light guide PR may be in contact with the intermediate lens MO. This allows the light converged or collected through the intermediate lens MO to be reflected. That is, the light efficiency through the optical device or light source device may be maximized.

[0357] Referring to FIG. 27b, the light source device 400 according to this embodiment may include a birefringent member MR. The birefringent member MR may be made of various materials that provide birefringence. For example, the birefringent member MR may be made of a transparent material that allows light to pass through. The birefringent member MR may also provide stress birefringence. The birefringent member MR may provide only phase retardation to incident light. For example, the birefringent member MR may have layers or regions with different material densities. This allows the birefringent member MR to provide phase retardation. The description of the birefringent member MR may be equally applied to other embodiments and modified examples.

[0358] Furthermore, the birefringent member MR may be located within the housing 422 of the light source device 400. For example, the birefringent member MR may be located between the second light guide PR and the light source 423. In this embodiment, the birefringent member MR may be located between the second light guide PR and the third light guide LG2. Also, the birefringent member MR may be located between the intermediate lens of the birefringent member MR and the third light guide LG2. This allows the birefringent member MR to efficiently polarize the condensed light. In other words, birefringence can be easily achieved with a single birefringent member MR.

[0359] 27c, the birefringent member MR can be located between the second light guide PR and the light source lens 424. In this case, the light source lens 424 can be disposed between the light source 423 and the second light guide PR. Accordingly, the description of the light source lens 424 can be applied equally hereinafter.

[0360] Also, the birefringent member MR may be located between the intermediate lens MO and the light source lens 424. Also, the birefringent member MR may be located between the third light guide LG2 and the light source lens 424. Also, the birefringent member MR may be located between the third light guide LG2 and the light source 423.

[0361] Further, as an additional example, the birefringent member MR may be located between the light source lens 424 and the light source 423. This allows the light source lens 424 to be disposed between the birefringent member MR and the second light guide PR.

[0362] Thereby, the birefringent member MR can be disposed between the light source lens 424 and the light source 423 , or between the second light guide PR and the light source lens 424 .

[0363] 27d, the birefringent member MR may be located on the inner surface of the housing 422. Alternatively, the birefringent member MR may be located on the inner surface of the light source assembly 421. This allows the birefringent member MR to perform phase retardation on the light reflected by the second light guide PR. This allows the phase-delayed or polarized light to pass through the second light guide PR and be reflected by the first light guide. This allows the light source device or optical device to provide improved light efficiency.

[0364] FIG. 28a is a cross-sectional view of a light source device that is an optical device according to yet another embodiment, and FIG. 28b is a modified example of FIG. 28a.

[0365] 28a, an optical device 400 according to another embodiment may include only the first light guide LG1. The light source device 420 described above does not include the third light guide and the third light guide. The following descriptions of the other embodiments of this specification may apply except for the description of this embodiment.

[0366] Also, the light source 423 may be at least one light source, and an intermediate lens MO may be located between the light source 423 and the first light guide LG1.

[0367] For example, only one light source 423 may provide one light to the display unit. When only information is to be provided to the user, the light source device may have only one light source. Alternatively, the light source 423 may emit two lights. For example, the two lights may be two of red, green, and blue. Alternatively, the light may include white light.

[0368] In addition, an intermediate lens MO may be disposed in the housing 422 of the light source device 420. The intermediate lens MO may be located between the light source 423 and the first light guide LG1.

[0369] Furthermore, the light source lens 424 may be disposed on the light source 423. As a result, the light source lens 424 may be located between the light source 423 and the intermediate lens MO. Also, the light source lens 424 may be located between the light source 423 and the first light guide LG1. Also, the first light guide LG1, the intermediate lens MO, the light source lens 424, and the light source 423 may overlap in the second direction (Y-axis direction).

[0370] The light source lenses 424 may be positioned above each of the two light sources 423. Alternatively, one light source lens 424 may be positioned above each of the two light sources 423.

[0371] As an additional example, the intermediate lens MO may not be disposed in the housing 422 of the light source device 420. The light source lens 424 may be disposed on the light source 423. This allows the light source lens 424 to be located between the light source 423 and the first light guide LG1. The first light guide LG1, the light source lens 424, and the light source 423 may overlap in the second direction (Y-axis direction).

[0372] Also, a light source lens 424 may be positioned above each of the two light sources 423. Alternatively, one light source lens 424 may be positioned above each of the two light sources 423.

[0373] Furthermore, the second light guide PR may have various shapes. The second light guide PR may have a shape that is convex or concave toward the first light guide LG1. Alternatively, the second light guide PR may have a flat shape. The second light guide PR may have various shapes corresponding to the shapes and functions of the light source 423, the intermediate lens M, and the light source lens 424 to increase light efficiency.

[0374] In addition, the second light guide PR may be spaced apart from the lens (intermediate lens or light source lens), or may be in contact with the lens (intermediate lens or light source lens). This configuration may improve the reflection efficiency of light transmitted through the lens.

[0375] 28b in more detail, a lens (intermediate lens or light source lens) may be disposed between the second light guide PR and the light source. In this case, the lens (intermediate lens or light source lens) may be spaced apart from or in contact with the second light guide PR, as described above. The lens (intermediate lens or light source lens) may also be spaced apart from or in contact with the light source 423. Furthermore, the lens (intermediate lens or light source lens) may extend in the second direction and be positioned adjacent to the light source 423 or the second light guide PR. For example, the lens (intermediate lens or light source lens) may be in contact with both the light source 423 and the second light guide PR. This may further maximize light efficiency.

[0376] FIG. 29a is a cross-sectional view of a light source device that is an optical device according to yet another embodiment, FIG. 29b is a modified example of FIG. 29a, and FIG. 29c is another modified example of FIG. 29a.

[0377] Referring to FIG. 29a, in an optical device according to yet another embodiment, the light source device may include the second light guide PR and the birefringent member MR as described above.

[0378] At this time, the birefringent member MR may be disposed between the second light guide PR and the light source 423. Also, the birefringent member MR may be disposed between the second light guide PR and the light source lens 424. And, the intermediate lens MO may be disposed between the second light guide PR and the birefringent member MR.

[0379] Then, the intermediate lens MO can be disposed between the second light guide PR and the birefringent member MR. The intermediate lens MO or the light source lens 424 can be in contact with the birefringent member MR. As shown in Fig. 29b, the intermediate lens MO can extend in the second direction and be in contact with the second light guide PR or the birefringent member MR.

[0380] 29c, the birefringent member MR may be located on the inner surface of the housing 422 of the light source device 420. In this case, the intermediate lens MO may have various shapes as described above.

[0381] As an additional example, the birefringent member MR may be located between the light source 423 and the second light guide PR. For example, the birefringent member MR may be located between a lens (an intermediate lens or a light source lens) and the second light guide PR. This may improve the efficiency of generating the polarization phenomenon.

Claims

1. a barrel in which the outer lens is placed; a light guide disposed within the barrel; a lens coupled to the light guide; and a light source that emits light into the light guide; The optical device, wherein the distance between the light guide and the lens is less than the distance between the light source and the lens.

2. The optical device of claim 1 , wherein the light guide abuts the lens.

3. The optical device of claim 1 , wherein the distance between the lens and the light source is less than the length of the light guide.

4. The optical device according to claim 1 , wherein the number of the lenses corresponds to the number of the light sources.

5. a first spacer in contact with the outer lens; and The optical device of claim 1 , further comprising: a second spacer in contact with the light guide.

6. 6. The optical device according to claim 5, wherein the size of the second spacer is larger than the size of the light guide and smaller than the sum of the size of the light guide and the size of the lens.

7. The optical device of claim 5 , wherein the size of the second spacer is greater than the sum of the size of the lens and the size of the light guide.

8. The optical device of claim 1 , wherein the light guide includes at least one prism.

9. The optical device of claim 1 , wherein the light guide comprises an X-prism.

10. a housing surrounding the barrel; The optical device of claim 1 , wherein the light source is disposed within the housing.

Images