Project equipment and electronic devices including the same

Abstract

The embodiment discloses a projection device including a light guide, a first light source arranged on a first side of the light guide, a lens group arranged on a fourth side of the light guide, and a first-side lens arranged between the first side of the light guide and the first light source, the first side of the light guide overlapping the fourth side of the light guide and the lens group in the optical axis direction, and the first-side lens contacting the light guide.

Description

[Technical Field]

[0001] Embodiments relate to a project apparatus and an electronic device including the same. [Background technology]

[0002] Virtual reality (VR) refers to a specific environment or situation that resembles 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 a real environment, making them appear as if they exist in the original 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 provide a spatial and temporal experience similar to the real world, allowing them to freely move between reality and imagination. Furthermore, users are not simply immersed in these environments; they can interact with the objects embodied in them by operating and directing real-world devices.

[0006] Recently, research into the gear and devices used in this field has been actively conducted. However, there is a growing need to provide such equipment with smaller size and higher resolution. 。 Summary of the Invention [Problem to be solved by the invention]

[0007] The embodiments provide a projection device used in AR (Augmented Reality) and an electronic device including the same, in which a lens is positioned closer to the light guide than the light source, making it easier to miniaturize the projection device and electronic device.

[0008] It also provides projectors and electronic devices with reduced TTL.

[0009] It also provides a more compact projector and electronic device with improved optical uniformity.

[0010] Also provided is a projection device with improved resolution and an electronic device including the same.

[0011] Also provided is a projector with improved reliability and an electronic device including the same.

[0012] Also provided is a projector having improved bonding strength and ease of assembly, and an electronic device including the same.

[0013] The present invention also provides a projector device that is easy to inspect and has improved bonding strength and durability, and an electronic device including the projector device.

[0014] The problems to be solved by the embodiments are not limited to these, and can be said to include the means for solving the problems described below and the purposes and effects that can be grasped from the embodiments. [Means for solving the problem]

[0015] The projection device of the embodiment includes a light guide, a first light source arranged on a first side of the light guide, a lens group arranged on a fourth side of the light guide, and a first side lens arranged between the first side of the light guide and the first light source, the first side of the light guide overlapping with the fourth side of the light guide in the optical axis direction of the lens group, and the first side lens contacting the light guide.

[0016] The lens group includes a first lens to an Nth lens, the first lens being positioned farthest from the fourth side of the light guide and having a convex surface opposite to the surface facing the fourth side, the Nth lens being positioned closest to the light guide and having a concave surface facing the fourth side of the light guide, the first side lens having a convex surface adjacent to the first light source, the power of the first lens being positive, the power of the Nth lens being negative, and the composite power of the lenses between the first lens and the Nth lens may be positive or negative.

[0017] The light guide may include a second light source arranged on the second side of the light guide, a third light source arranged on the third side of the light guide, a second side lens arranged between the second side of the light guide and the second light source, and a third side lens arranged between the third side of the light guide and the third light source, wherein the second side lens has a convex surface adjacent to the second light source, and the third side lens has a convex surface adjacent to the third light source, and the second side of the light guide may be arranged to face the third side of the light guide across the light guide.

[0018] The first-side lens may be in contact with the light guide, and the first-side lens may have a radius of curvature of 100 mm or more at the optical axis on a surface adjacent to the light guide.

[0019] The light guide and the first-side lens may be in contact with each other by an adhesive.

[0020] The side surface of the light guide may be larger than or the same as the surface of the first-side lens adjacent to the light guide.

[0021] The first-side lens may have a flat surface adjacent to the light guide.

[0022] The projection device according to the embodiment includes N lenses and a first light source, a light guide disposed between the N lenses and the first light source, and a first side lens disposed between the light guide and the first light source, and of the N lenses, the first lens disposed farthest from the light guide has a convex surface opposite to the surface facing the light guide, and the Nth lens disposed closest to the light guide has a concave surface facing the light guide.

[0023] Among the N lenses, the first lens may have the largest effective diameter, and among the N lenses, the Nth lens may have the smallest effective diameter, and a lens disposed between the first lens and the Nth lens may have an effective diameter smaller than that of the first lens and larger than that of the Nth lens.

[0024] The first light source may be an RGB LED or a single RGB LED.

[0025] The light guide may include a second light source disposed on a second side of the light guide and a third light source disposed on a third side of the light guide, the second side of the light guide being disposed opposite the third side of the light guide.

[0026] The optical system may include a second light guide disposed so as to face the first lens, and a diaphragm disposed in the second light guide.

[0027] The Nth lens may be in contact with the light guide.

[0028] At least one of the N lenses may have a surface opposite to the surface facing the light guide that is concave toward the light guide.

[0029] The length of the N lenses may be less than the length of the light guide.

[0030] In addition, a projection device according to an embodiment includes a plurality of lenses, a barrel in which the plurality of lenses are arranged and which includes an opening on a side surface, an optical signal generating unit arranged adjacent to the barrel and which generates an optical signal including video information, and a light source device coupled to the barrel on the side surface of the opening, the light source device including a light source and a housing having an opening facing the opening, the barrel including a barrel protrusion protruding outward, the housing including a housing protrusion protruding outward, the barrel protrusion at least partially penetrating the housing protrusion.

[0031] The housing protrusion may include a protrusion hole, and the barrel protrusion may be disposed within the protrusion hole.

[0032] The protrusion hole may have a partial exposed area.

[0033] The light source device may include a light source assembly disposed in the housing, and the light source assembly may include an assembly protrusion disposed in the protrusion hole.

[0034] The assembly projection may oppose the barrel projection.

[0035] The assembly protrusion may be located in an exposed portion of the protrusion hole.

[0036] The light source device may include a first light guide disposed in the barrel, and the light source device may include a second light guide disposed in the housing and a light source that emits light toward the second light guide.

[0037] The light source device may include a light source assembly surrounding the housing, the housing including at least one housing hole corresponding to the second light guide, and the light source assembly including an assembly hole corresponding to the at least one housing hole.

[0038] The assembly holes may be interconnected.

[0039] The assembly holes may include a first assembly hole, a second assembly hole disposed outside the first assembly hole, and a third assembly hole disposed outside the second assembly hole.

[0040] The first assembly hole may be adjacent to the second light guide.

[0041] The third assembly hole may be larger than the first assembly hole and the second assembly hole.

[0042] The barrel may include a first region and a second region below the first region and adjacent to the optical signal generating portion.

[0043] The light source device may include a light source assembly surrounding the housing, and the light source assembly may include a step portion formed in a region adjacent to the second region.

[0044] At least a portion of the optical signal generated by the optical signal generating unit may be transmitted through or reflected by the first optical guide. [Effects of the Invention]

[0045] In the embodiment, when using a projection device used in AR (Augmented Reality), etc., and an electronic device including the same, a lens is arranged in the light guide closer to the light source, thereby realizing a projection device and an electronic device that can be more easily miniaturized.

[0046] Also, projectors and electronic devices with reduced TTL can be implemented.

[0047] In addition, it is possible to realize a projector and an electronic device that are more compact and have improved optical uniformity.

[0048] In addition, a projection apparatus with improved resolution and an electronic device including the same can be realized.

[0049] Furthermore, it is possible to realize a projector having improved reliability and an electronic device including the projector.

[0050] In addition, a projector having improved bonding strength and assembly efficiency, and an electronic device including the projector can be realized.

[0051] In addition, it is possible to realize a project device that is easy to inspect and has improved bonding strength and durability, and an electronic device including the same.

[0052] 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]

[0053] [Figure 1] FIG. 1 is a conceptual diagram showing an embodiment of an AI device.

[0054] [Figure 2] FIG. 2 is a block diagram showing the configuration of an augmented reality electronic device according to an embodiment of the present invention.

[0055] [Figure 3] FIG. 3 is a perspective view of an augmented reality electronic device according to a first embodiment of the present invention.

[0056] [Figure 4] FIG. 4 is a conceptual diagram illustrating various display methods applicable to the display unit according to the embodiment of the present invention. [Figure 5] FIG. 5 is a conceptual diagram illustrating various display methods applicable to the display unit according to the embodiment of the present invention. [Figure 6]FIG. 6 is a conceptual diagram illustrating various display methods applicable to the display unit according to the embodiment of the present invention.

[0057] [Figure 7] FIG. 7 is a perspective view of a projector device according to one embodiment.

[0058] [Figure 8] FIG. 8 is an exploded perspective view of a projector device according to an embodiment.

[0059] [Figure 9] FIG. 9 is a perspective view of a barrel in a projector according to one embodiment.

[0060] [Figure 10] FIG. 10 is a side view of a barrel in a projector device according to one embodiment.

[0061] [Figure 11] FIG. 11 is a bottom view of a barrel with a light guide inserted in a projection device according to one embodiment.

[0062] [Figure 12] FIG. 12 is a diagram illustrating the coupling of an outer lens, a first spacer, a light guide, a lens, and a second spacer in the barrel of a projection device according to one embodiment.

[0063] [Figure 13] FIG. 13 is a diagram illustrating the connection between the barrel, the housing, and the additional housing in a projector device according to one embodiment.

[0064] [Figure 14] FIG. 14 is a diagram illustrating the coupling between the housing and the light source unit in the projection device according to an embodiment.

[0065] [Figure 15]FIG. 15 is a diagram showing the optical system of the projection device according to the first embodiment.

[0066] [Figure 16] FIG. 16 is a diagram showing the optical system of the projection device according to the second embodiment.

[0067] [Figure 17] FIG. 17 is a diagram showing the optical system of the projection device according to the third embodiment.

[0068] [Figure 18] FIG. 18 is a conceptual diagram of a project device according to another embodiment.

[0069] [Figure 19] FIG. 19 is a perspective view of a projector device according to another embodiment.

[0070] [Figure 20] FIG. 20 is an exploded perspective view of a projector according to another embodiment.

[0071] [Figure 21] FIG. 21 is a cross-sectional view taken along line AA′ in FIG.

[0072] [Figure 22a] FIG. 22a is a side view of a barrel in a projector according to an embodiment.

[0073] [Figure 22b] FIG. 22b is another side view of the barrel of the projector according to the embodiment.

[0074] [Figure 22c] FIG. 22c is a cross-sectional view of a barrel in a projector device according to an embodiment.

[0075] [Figure 23a]FIG. 23a is a side view of a barrel and a housing of a projector device according to an embodiment.

[0076] [Figure 23b] FIG. 23b is another side view of the barrel and housing of the projector device according to the embodiment.

[0077] [Figure 23c] FIG. 23c is a cross-sectional view of the barrel and housing of the projector device according to the embodiment.

[0078] [Figure 24a] FIG. 24a is a side view of a barrel, a housing, and a light source assembly in a projector device according to an embodiment.

[0079] [Figure 24b] FIG. 24b is another side view of the barrel, housing, and light source assembly of the projection device according to the embodiment.

[0080] [Figure 24c] FIG. 24c is a cross-sectional view of the barrel, housing, and light source assembly of a projector device according to an embodiment.

[0081] [Figure 25] FIG. 25 is an enlarged view of the K1 portion in FIG.

[0082] [Figure 26a] FIG. 26a is an enlarged view of the K2 portion in FIG.

[0083] [Figure 26b] FIG. 26b is a variation of FIG. 26a.

[0084] [Figure 26c] FIG. 26c is another variation of FIG. 26a.

[0085] [Figure 26d] FIG. 26d is yet another variation of FIG. 26a. DETAILED DESCRIPTION OF THE INVENTION

[0086] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0087] However, the technical concept of the present invention is not limited to the described embodiments, but can be embodied in various different forms, and one or more of the components of the embodiments can be selectively combined and substituted within the scope of the technical concept of the present invention.

[0088] Furthermore, unless otherwise clearly defined and described, terms (including technical and scientific terms) used in the embodiments of the present invention shall be interpreted as meanings that can be commonly understood by a person of ordinary skill in the technical field to which the present invention belongs, and commonly used terms, such as terms defined in a dictionary, may be interpreted in light of the contextual meaning of the relevant art.

[0089] Furthermore, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0090] In this specification, the singular also includes the plural unless the context dictates otherwise, and when it is written as "A and (and) at least one (or more) of B, C", it may include one or more of all possible combinations of A, B, and C.

[0091] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of embodiments of the present invention.

[0092] Such terms are used merely to distinguish a component from other components, and are not intended to limit the essence, order, or procedure of the component.

[0093] Furthermore, when a component is described as being "coupled," "coupled," or "connected" to another component, it includes not only the case where the component is directly coupled, coupled, or connected to the other component, but also the case where the component is "coupled," "coupled," or "connected" by another component between the component and the other component.

[0094] Furthermore, when it is stated that something is formed or disposed "above or below" a component, "above or below" refers not only to the case where the two components are in direct contact with each other, but also to 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.

[0095] FIG. 1 is a conceptual diagram showing an embodiment of an AI device.

[0096] 1, in the AI system, 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 is 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 also be referred to as the AI devices 11 to 15.

[0097] The cloud network 10 may refer to a network that forms part of a cloud computing infrastructure or exists within a cloud computing infrastructure, and may be configured using a 3G network, a 4G or LTE (Long Term Evolution) network, a 5G network, or the like.

[0098] That is, the devices 11 to 16 that make up the AI system can be connected to one another via the cloud network 10. In particular, the devices 11 to 16 can communicate with one another via a base station, but can also communicate with one another directly without going through a base station.

[0099] The AI server 16 may include a server that performs AI processing and a server that performs calculations on big data.

[0100] 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.

[0101] At this time, the AI server 16 can train the artificial neural network according to a machine learning algorithm instead of the AI devices 11 to 15, and can directly store the training model or transmit it to the AI devices 11 to 15.

[0102] 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 responses and control commands based on the inferred result value and transmits them to the AI devices 11 to 15.

[0103] Alternatively, the AI devices 11 to 15 can infer a result value for input data using a direct learning model, and generate a response or control command based on the inferred result value.

[0104] <AI+ロボット>

[0105] 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.

[0106] 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.

[0107] The robot 11 can use sensor information obtained from various types of sensors to obtain status information of the robot 11, detect (recognize) the surrounding environment and objects, generate map data, determine a movement path and driving plan, determine a response to user interaction, or determine an action.

[0108] Here, the robot 11 can use sensor information acquired from at least one of a lidar, a radar, and a camera to determine a movement route and a travel plan.

[0109] The robot 11 can perform the above-described actions by using a learning model configured with at least one or more artificial neural networks. For example, the robot 11 can recognize the surrounding environment and objects using the learning model, and can determine its actions using the recognized surrounding environment information or object information. Here, the learning model may be one that is learned directly by the robot 11, or may be one that is learned by an external device such as the AI server 16.

[0110] At this time, the robot 11 may generate results using a direct learning model and perform an action, or may transmit sensor information to an external device such as an AI server 16, receive the results generated thereby, and perform an action.

[0111] The robot 11 may determine a movement route and a driving plan using at least one of map data, object information detected from sensor information, or object information obtained from an external device, and control the driving unit to make the robot 11 travel according to the determined movement route and driving plan.

[0112] The map data may include object identification information for various objects arranged in the space where 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. Further, the object identification information may include a name, a type, a distance, a position, and the like.

[0113] Also, the robot 11 may perform operations and travel by controlling the drive unit based on user control / interaction. At this time, the robot 11 may acquire intention information of interaction according to the user's actions and voice utterances, and determine a response based on the acquired intention information to perform an operation.

[0114] <AI + Autonomous Driving>

[0115] The autonomous driving vehicle 12 can be embodied as a mobile robot, a vehicle, an unmanned aerial vehicle, etc. to which AI technology is applied.

[0116] The autonomous driving vehicle 12 may include an autonomous driving control module for controlling the autonomous driving function. The autonomous driving control module may mean a software module or a chip embodied in hardware thereof. The autonomous driving control module may be included inside as a component of the autonomous driving vehicle 12, or may be configured as separate hardware outside the autonomous driving vehicle 12 and connected thereto.

[0117] The autonomous driving vehicle 12 can acquire state information of the autonomous driving vehicle 12, detect (recognize) the surrounding environment and objects, generate map data, determine a movement route and a travel plan, or determine an operation using sensor information acquired from various types of sensors.

[0118] Here, the autonomous driving vehicle 12 can use sensor information acquired from at least one or more sensors among a lidar, a radar, and a camera, similar to the robot 11, in order to determine a movement route and a travel plan.

[0119] In particular, the autonomous vehicle 12 may recognize the environment and objects in areas where the field of view is blocked or areas beyond a certain distance by receiving sensor information from an external device, or may receive information recognized directly from an external device.

[0120] The autonomous vehicle 12 can perform the above operations using a learning model configured with at least one or more artificial neural networks. 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 may be one that is learned directly by the autonomous vehicle 12, or may be one that is learned by an external device such as the AI server 16.

[0121] In this case, the autonomous vehicle 12 may generate results using a direct learning model and perform operations, or may transmit sensor information to an external device such as an AI server 16, receive the results generated thereby, and perform operations.

[0122] The autonomous vehicle 12 may determine a travel route and a driving plan using at least one of map data, object information detected from sensor information, or object information obtained from an external device, and control the drive unit to drive the autonomous vehicle 12 according to the determined travel route and driving plan.

[0123] The map data may include object identification information for various objects located in a space (e.g., a road) in which autonomous vehicle 12 travels. For example, the map data may include object identification information for fixed objects such as streetlights, rocks, and buildings, and movable objects such as vehicles and pedestrians. The object identification information may also include name, type, distance, location, and the like.

[0124] Furthermore, autonomous vehicle 12 may operate and run by controlling a drive unit based on control / interaction by a user. In this case, autonomous vehicle 12 may acquire intention information of an interaction in response to a user's action or voice utterance, and may determine a response based on the acquired intention information to operate.

[0125] <AI+XR>

[0126] The XR device 13 applies AI technology and can be realized as a head-mounted display (HMD), a head-up display (HUD) installed in a vehicle, a television, a mobile phone, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a fixed robot, a mobile robot, etc.

[0127] The XR device 13 can acquire information about the surrounding space or real objects by analyzing 3D point cloud data or image data acquired via various sensors or from an external device to generate position data and attribute data for the 3D points, and can render and output the XR object to be output. For example, the XR device 13 can output an XR object including additional information about the recognized object in association with the recognized object.

[0128] The XR device 13 can perform the above operations using a learning model configured with at least one artificial neural network. For example, the XR device 13 can recognize real objects in 3D point cloud data or image data using the learning model and provide information corresponding to the recognized real objects. Here, the learning model may be one that is learned directly by the XR device 13 or one that is learned by an external device such as the AI server 16.

[0129] At this time, the XR device 13 may generate results using a direct learning model and perform operations, or it may transmit sensor information to an external device such as the AI server 16, receive the results generated thereby, and perform operations.

[0130] <AI + Robot + Autonomous Driving>

[0131] The robot 11 is applied with AI technology and autonomous driving technology, and can be embodied in a guiding robot, a transporting robot, a cleaning robot, a wearable robot, an entertainment robot, a pet robot, a drone, etc.

[0132] The robot 11 to which AI technology and autonomous driving technology are applied may mean a robot itself having an autonomous driving function, a robot 11 that interacts with the autonomous driving vehicle 12, etc.

[0133] The robot 11 having an autonomous driving function may be a general term for a device that moves along a given route by itself or determines the route by itself without user control.

[0134] The robot 11 having an autonomous driving function and the autonomous driving vehicle 12 may use a common sensing method to determine one or more of the movement route or the driving plan. For example, the robot 11 having an autonomous driving function and the autonomous driving vehicle 12 may use the information sensed via a lidar, a radar, a camera to determine one or more of the movement route or the driving plan.

[0135] The robot 11 that interacts with the autonomous driving vehicle 12 exists separately from the autonomous driving vehicle 12, may be coordinated with the autonomous driving function inside or outside the autonomous driving vehicle 12, and may perform operations coordinated with the user riding in the autonomous driving vehicle 12.

[0136] At this time, the robot 11 interacting with the autonomous vehicle 12 can control and 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 environmental information or object information and providing it to the autonomous vehicle 12.

[0137] Alternatively, the robot 11 interacting with the autonomous vehicle 12 can monitor the user on board the autonomous vehicle 12 and control the functions of the autonomous vehicle 12 through interaction with the user. For example, if the robot 11 determines that the driver is drowsy, it can activate the autonomous driving functions of the autonomous vehicle 12 or assist in controlling the drive units 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 functions but also functions provided by a navigation system or an audio system provided inside the autonomous vehicle 12.

[0138] Alternatively, the robot 11 interacting with the autonomous vehicle 12 may provide information or assist functions to the autonomous vehicle 12 from outside the autonomous vehicle 12. For example, the robot 11 may provide traffic information, including traffic light information, to the autonomous vehicle 12, such as a smart traffic light, or may interact with the autonomous vehicle 12 and automatically connect an electric charger to a charging port, such as an automatic electric charger for an electric vehicle.

[0139] <AI+ロボット+XR>

[0140] The robot 11 may be implemented using AI and XR technologies, and 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, or the like.

[0141] The robot 11 to which XR technology is applied may mean a robot that is the target of control / interaction within the XR video. In this case, the robot 11 is distinguished from the XR device 13 and can be interlocked with each other.

[0142] When the robot 11, which is the target of control / interaction within the XR video, acquires sensor information from a sensor including a camera, the robot 11 or the XR device 13 can generate an XR video based on the sensor information, and the XR device 13 can output the generated XR video. Also, such a robot 11 can operate based on a control signal input via the XR device 13 or a user interaction.

[0143] For example, the user can view an XR video corresponding to the perspective of the remotely interlocked robot 11 via an external device such as the XR device 13, and can adjust the autonomous driving route of the robot 11, control the operation or driving, or check information on surrounding objects through interaction.

[0144] <AI + Autonomous Driving + XR>

[0145] The autonomous driving vehicle 12 is applied with AI technology and XR technology and can be embodied in a mobile robot, a vehicle, a drone, etc.

[0146] The autonomous driving vehicle 12 to which XR technology is applied may mean an autonomous driving vehicle equipped with means for providing an XR video, an autonomous driving vehicle that is the target of control / interaction within the XR video, etc. In particular, the autonomous driving vehicle 12 that is the target of control / interaction within the XR video is distinguished from the XR device 13 and can be interlocked with each other.

[0147] Autonomous vehicle 12 equipped with a means for providing XR video can acquire sensor information from sensors including cameras and output XR video generated based on the acquired sensor information. For example, autonomous vehicle 12 equipped with a HUD can output XR video to provide passengers with XR objects corresponding to real objects or objects on a screen.

[0148] In this case, when an XR object is output to a HUD, at least a portion of the XR object can be output so as to overlap with an actual object that the passenger's gaze is directed at. On the other hand, when an XR object is output to a display provided inside autonomous vehicle 12, at least a portion of the XR object can be output so as to overlap with an object on the screen. For example, autonomous vehicle 12 can output XR objects corresponding to objects such as roads, other vehicles, traffic lights, traffic signs, motorcycles, pedestrians, and buildings.

[0149] 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 generates XR image based on the sensor information, and the XR device 13 can output the generated XR image. Furthermore, such an autonomous vehicle 12 can operate based on control signals input via an external device such as the XR device 13 or user interaction.

[0150] <Augmented reality technology>

[0151] 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 as CG images only, AR technology provides virtual CG images on top of images of real objects, and MR technology is a computer graphics technology that mixes and synthesizes virtual objects into the real world.

[0152] MR technology is similar to AR technology in that it displays real and virtual objects together, 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 equally.

[0153] XR technology can be applied to HMDs (Head-Mount Displays), HUDs (Head-Up Displays), mobile phones, tablet PCs, laptops, desktops, televisions, digital signage, etc., and devices to which XR technology is applied may be called XR devices.

[0154] Hereinafter, an electronic device that provides augmented reality according to an embodiment of the present invention will be described in detail, particularly a projector that is applied to augmented reality and an electronic device including the same.

[0155] FIG. 2 is a block diagram showing the configuration of an augmented reality electronic device 20 according to an embodiment of the present invention.

[0156] 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 shown 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 listed above.

[0157] More specifically, among the above components, the wireless communication unit 21 may include one or more modules that enable wireless communication between the electronic device 20 and a wireless communication system, between the electronic device 20 and another electronic device, or between the electronic device 20 and an external server. The wireless communication unit 21 may also include one or more modules that connect the electronic device 20 to one or more networks.

[0158] Such 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.

[0159] 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 inputting information from a user. The voice data and image data collected by the input unit 22 may be analyzed and processed according to a user's control command.

[0160] The sensing unit 23 may include one or more sensors for sensing at least one of information within the electronic device 20, environmental information surrounding the electronic device 20, and user information.

[0161] 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 means), a microphone, a battery gauge, an environmental sensor (e.g., a barometer, a hygrometer, a thermometer, a radiation detection sensor, a heat detection sensor, a gas detection sensor, etc.), and a chemical sensor (e.g., an electronic nose, a healthcare sensor, a biometric recognition sensor, etc.). Meanwhile, the electronic device 20 disclosed herein may utilize information sensed by at least two or more of these sensors in combination.

[0162] The output unit 24 generates an output related to vision, hearing, touch, or the like, 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 or integrated with a 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.

[0163] The interface unit 25 serves as a passageway for various types of external devices connected to the electronic device 20. Through the interface unit 25, the electronic device 20 can receive virtual reality or augmented reality content from the external devices and can interact with them by exchanging various input signals, sensing signals, and data.

[0164] 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.

[0165] The memory 26 also stores data supporting various functions of the electronic device 20. The memory 26 may store a plurality of application programs (or applications) run by the electronic device 20, as well as data and instructions for 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 release for basic functions of the electronic device 20 (e.g., functions for receiving and sending calls, and functions for receiving and sending messages).

[0166] In addition to the operation of the application program, the control unit 27 typically controls the overall operation of the electronic device 20. The control unit 27 can process signals, data, information, etc. input or output via the above-mentioned components.

[0167] The control unit 27 can provide appropriate information to a user or process functions by controlling at least some of the components 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.

[0168] 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 using a sensor provided in a controller that operates in conjunction with the electronic device 20.

[0169] Furthermore, the control unit 27 can perform the operation (or function) of the electronic device 20 using application programs stored in the memory .

[0170] 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.

[0171] At least some of the above components may cooperate with one another to implement the operation, control, or control method of the electronic device according to various embodiments described below. 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 the memory 26.

[0172] 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 also 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.

[0173] FIG. 3 is a perspective view of an augmented reality electronic device according to an embodiment of the present invention.

[0174] As shown in FIG. 3, an electronic device according to an embodiment of the present invention may include a frame 100, a projector 200, and a display unit 300.

[0175] The electronic device may be provided as a glass type (smart glass). The glass type electronic device is configured to be wearable on the head of a human body, and for this purpose may include a frame (case, housing, etc.) 100. The frame 100 may be formed of a flexible material so that it can be easily worn.

[0176] The frame 100 is supported on the head and has a space for mounting various components. As shown in the figure, electronic components such as a projector device 200, a user input unit 130, or an audio output unit 140 may be mounted on the frame 100. Furthermore, a lens covering at least one of the left and right eyes may be removably mounted on the frame 100.

[0177] As shown in the figure, the frame 100 may have the form of glasses worn on the face of the user's body, but is not necessarily limited to this and may also have the form of goggles or the like worn in close contact with the user's face.

[0178] Such a frame 100 may include a front frame 110 having at least one opening, and a pair of side frames 120 extending parallel to each other in the y direction (in FIG. 3) intersecting the front frame 110.

[0179] Frame 100 has length in the x direction D1 and the length in the y direction L1 may be the same or different.

[0180] The project device 200 is configured to control various electronic components provided in an electronic device. The project device 200 may be referred to interchangeably as a "light output device," a "light projecting device," a "light irradiation device," an "optical device," and the like.

[0181] The projector device 200 can generate an image or a series of images visible to a user. The projector device 200 may include an image source panel that generates an image, and a plurality of lenses that diffuse and converge light generated from the image source panel.

[0182] The project device 200 can be fixed to either one of the two side frames 120. For example, the project device 200 may be fixed to the inside or outside of either one of the side frames 120, or may be built into and integrally formed within either one of the side frames 120. Alternatively, the project device 200 may be fixed to the front frame 110, or may be provided separately from the electronic device.

[0183] 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 eye and the right eye so that images can be displayed 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 that images can be displayed toward 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 eye and the right eye.

[0184] The display unit 300 allows a user to visually recognize the external environment and simultaneously shows the user an image generated by the projector 200. For example, the display unit 300 can project an image onto a display area using a prism.

[0185] The display unit 300 may be formed to be translucent so that the projected image and the general field of view (the range seen through the user's eyes) can be simultaneously displayed. For example, the display unit 300 may be formed of a translucent optical member including glass.

[0186] 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 to the front frame 110. 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.

[0187] As shown in FIG. 3, when image light for an image is incident from the projector 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 projector 200 to be shown to the user.

[0188] As a result, the user can simultaneously view the external environment through the opening of the frame 100 and the image generated by the projector device 200. That is, the image output through the display unit 300 appears to overlap with the general field of view. Using these display characteristics, the electronic device can provide augmented reality (AR), which overlays a virtual image on a real image or background to display it as a single image.

[0189] In addition to this driving, the external environment and the image generated by the project device 200 can be presented to the user with a time lag for a short period of time that is imperceptible to humans. For example, within one frame, the external environment can be presented to the user in one section, and an image from the project device 200 can be presented to the user in another section.

[0190] Alternatively, both overlap and stagger can be provided.

[0191] 4 to 6 are conceptual diagrams illustrating various display methods applicable to the display unit according to the embodiment of the present invention.

[0192] 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.

[0193] As shown in FIG. 4, a prism-type optical member can be used in a display unit 300-1 according to an embodiment of the present invention.

[0194] In an embodiment, the prism-type optical element may be a flat-type glass optical element in which the surface into which the image light is incident and the surface from which the image light is emitted 300a are flat, as shown in FIG. 4(a), or a freeform glass optical element in which the surface from which the image light is emitted 300b is formed as a curved surface without a fixed radius of curvature, as shown in FIG. 4(b).

[0195] The flat-type glass optical element receives the image light generated by the projection device 200 on its flat side, reflects it on the total reflection mirror 300a provided therein, and emits it toward the user. Here, the total reflection mirror 300a provided inside the flat-type glass optical element may be formed inside the flat-type glass optical element by a laser.

[0196] The freeform glass optical element is configured to become thinner as it moves away from the incident surface, and can receive the image light generated by the projection device 200 on its curved side, totally reflect it internally, and emit it toward the user.

[0197] As shown in FIG. 5, a display unit 300-2 according to another embodiment of the present invention may use a waveguide type optical member or a light guide optical element (LOE).

[0198] Examples of such waveguide or light guide type optical elements include a glass optical element using a segmented beam splitter as shown in FIG. 5(a), a glass optical element using a sawtooth prism as shown in FIG. 5(b), a glass optical element having a diffractive optical element (DOE) as shown in FIG. 5(c), a glass optical element having a hologram optical element (HOE) as shown in FIG. 5(d), a glass optical element having a passive grating as shown in FIG. 5(e), and a glass optical element having an active grating as shown in FIG. 5(f).

[0199] A glass optical element of the partial reflection mirror (segmented beam splitter) type as shown in FIG. 5(a) may have a total reflection mirror 301a on the side where an optical image is incident inside the glass optical element, and a partial reflection mirror (segmented beam splitter) 301b on the side where the optical image is emitted, as shown.

[0200] As a result, the optical image generated by the projection 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, and is recognized by the user's eyes.

[0201] In a glass optical element using a sawtooth prism as shown in Figure 5(b), image light from the projection device 200 is incident on the side of the glass in an oblique direction, is totally reflected inside the glass, and is emitted to the outside of the glass by the sawtooth irregularities 302 provided on the side from which the light image is emitted, and is recognized by the user's eyes.

[0202] 5(c), a glass optical member having a diffractive optical element (DOE) may have a first diffractive portion 303a on a surface where an optical image is incident and a second diffractive portion 303b on a surface where the optical image is emitted. The first and second diffractive portions 303a and 303b may be formed by patterning a specific pattern on the glass surface or by attaching a separate diffractive film.

[0203] As a result, the optical image generated by the projector device 200 is incident through the first diffraction unit 303a, diffracted, and guided along the longitudinal direction of the glass while undergoing total reflection, and is emitted through the second diffraction unit 303b and recognized by the user's eyes.

[0204] 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. As a result, an optical image is incident from the projection device 200 in an oblique direction through the side of the glass, is totally reflected, and is guided along the length of the glass, emitted by the out-coupler 304, and recognized by the user's eyes. Such hologram optical members have slightly different structures, and can be further subdivided into structures with passive gratings and structures with active gratings.

[0205] 5(e), a glass optical element having a passive grating 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.

[0206] As a result, the optical 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, and is recognized by the user's eyes.

[0207] 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 an 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.

[0208] As a result, the optical image incident on the glass is guided along the longitudinal direction of the glass while being totally reflected by the in-coupler 306a, and is emitted outside the glass by the out-coupler 306b, and is recognized by the user's eyes.

[0209] As a display unit according to a modified example, a pin mirror type optical member can be used.

[0210] 6(a), a surface reflection type optical element of a freeform combiner type may be a freeform combiner glass having a curved surface overall, in which a plurality of flat surfaces with different incident angles of optical images are formed from a single piece of glass to function as a combiner. In such a freeform combiner glass 300, an optical image is incident at different incident angles in different regions and is output to the user.

[0211] The flat HOE type surface reflection type optical element as shown in FIG. 6(b) may be provided by coating or patterning a hologram optical element (HOE) 311 on the surface of flat glass, and an optical image incident on the projection device 200 may pass through the hologram optical element 311, be reflected by the surface of the glass, and then pass through the hologram optical element 311 again to be emitted toward the user.

[0212] 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) 311 on the surface of a freeform-shaped glass, and the operating principle may be the same as that described in FIG. 6(b).

[0213] FIG. 7 is a perspective view of a projector device according to an embodiment, and FIG. 8 is an exploded perspective view of the projector device according to an embodiment.

[0214] 7 and 8, a projector 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 projector device 200 may also include a first spacer SP1 and a second spacer SP2.

[0215] First, the outer lens LS may be inserted into the barrel 210. That is, the barrel 210 is located inside the projection apparatus 200 and can accommodate the outer lens LS. The barrel 210 also accommodates the light guide LG, the lens LS, and the like. ZFL , first spacer -SP1 and a second spacer SP2.

[0216] Such a barrel 210 may have a space for accommodating the above-mentioned components or additional optical elements. For example, the barrel 210 may include a first groove and a second groove, which will be described later. An outer lens LS may be disposed in the first groove. A 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 may have 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.

[0217] On the other hand, if the spaces are connected to each other, the projector device can be made smaller.

[0218] An outer lens LS is housed in the barrel 210, and a first spacer SP1 may be located on the outside of the outer lens LS. The first spacer SP1 is disposed on the outside of the outer lens LS housed in the first groove of the barrel 210, and can prevent the outer lens LS from falling off.

[0219] The barrel 210 may include a plurality of holes connected to the second groove. The plurality of holes may be located on the side of the barrel 210. This allows light emitted from the light source unit 230, which will be described later, to enter the light guide LG. Furthermore, the light incident on the light guide LG may be reflected and passed through or transmitted by the outer lens LS to be provided to the above-mentioned waveguide or wave guide. To this end, the first groove and the second groove may be connected to each other via 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 via 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.

[0220] A light guide LG may be located within the barrel 210. The light guide LG may be connected to a lens FL, which will be described below.

[0221] 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 joining 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. In an embodiment, the light guide LG may have a structure in which at least two or more prisms are combined. The light guide LG may also be a non-polarizing prism. In other words, the light guide LG does not need to polarize the light emitted from the light sources 232a, 232b, and 232c.

[0222] The light guide LG may also include at least two or more coating surfaces (reflective members or reflective sheets). One of these 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. Therefore, for each of the lights emitted from the plurality of light sources 232a, 232b, and 232c, light of a desired wavelength band may be reflected by the light guide LG. For example, light passing through the light guide LG may be provided to an outer lens LS.

[0223] The lens FL may be connected to the light guide LG. The lens FL may be disposed adjacent to the light guide LG. For example, the lens FL may be in contact with the light guide. That is, the lens FL may be in contact with the light guide LG. Alternatively, the light guide LG may be in contact with the lens FL.

[0224] The lens FL may also be coupled to the light guide LG. In this case, the lens FL may be coupled to the light guide LG via a joining member or a coupling member. The joining member or coupling member may be located between the lens FL and the light guide LG.

[0225] The lenses FL are located on the outer surface of the light guide LG, and there may be at least one lens FL. For example, the number of lenses FL may correspond to the number of light sources of the light source unit 230 described below. If the number of light sources is three, the number of lenses FL may also be three.

[0226] 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 can receive light emitted from the first light source unit to the third light source unit, respectively.

[0227] 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.

[0228] 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 arranged to surround at least a region of the barrel 210. The housing 220 may further include a space for accommodating a light source. The housing 220 may also include at least one housing hole. The light source may be arranged 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 located outside the barrel 210 and may include a space for accommodating the barrel 210 and the light source unit 230.

[0229] 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.

[0230] The first light source unit 230a may overlap 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 projection device 200. That is, the second direction (Y-axis direction) may correspond to the direction in which light emitted from the light source device 230 is reflected by the light guide LG and emitted to the display unit.

[0231] 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.

[0232] The second light source unit 230b and the third light source unit 230c may overlap in the 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.

[0233] In addition, 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. In addition, 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.

[0234] 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.

[0235] Furthermore, the substrates 231a, 231b, 231c, the light sources 232a, 232b, 232c, and the optical members 233a, 233b, 233c may be located inward in this order, i.e., the optical members may be located closer to the light guide LG than the substrates and the light sources.

[0236] The substrates 231a, 231b, 231c may be connected to the light sources 232a, 232b, 232c and may transmit electrical energy to enable the light sources 232a, 232b, 232c to emit light.

[0237] The substrates 231 a , 231 b , and 231 c may be located on the outermost sides of the housing 220 .

[0238] Furthermore, 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). Furthermore, the second substrate 231b and the third substrate 231c may be positioned to face each other in the housing 220. Furthermore, the first substrate 231a may be positioned in the region between the second substrate 231b and the third substrate 231c.

[0239] The light sources 232a, 232b, and 232c can emit light. For example, the light emitted from the light sources 232a, 232b, and 232c can enter a light guide LG in the housing 220. The light guide LG may be located within the housing 220.

[0240] Alternatively, there may be one or more light sources 232a, 232b, and 232c. The light sources 232a, 232b, and 232c may include a first light source 232a, a second light source 232b, and a third light source 232c. Alternatively, the light sources 232a, 232b, and 232c may be disposed on each substrate.

[0241] That is, the light source device 230 may have a single light source 232a, 232b, and 232c or multiple light sources. For example, the light sources 232a, 232b, and 232c may be multiple, including 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 to face 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). Furthermore, a light guide LG may be positioned between the second light source 232b and the third light source 232c. This allows the light guide LG to overlap the second light source 232b and the third light source 232c.

[0242] 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 projector device 200 can have a compact light source device 230.

[0243] Furthermore, the first light source 232a, the second light source 232b, and the third light source 232c can emit light of wavelengths or colors that are partially the same or different from one another. For example, the first light source 232a, the second light source 232b, and the third light source 232c can emit red, green, and blue light, respectively.

[0244] The optical members 233a, 233b, and 233c may be one or more. 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. Furthermore, the first optical member 233a, the second optical member 233b, and the third optical member 233c may 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 entering the light source. That is, the light source can be protected.

[0245] The additional housing 240 may be disposed outside the barrel 210 and 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. This may provide the projector device 200 according to the embodiment with improved reliability.

[0246] FIG. 9 is a perspective view of a barrel in a projector device according to one embodiment, FIG. 10 is a side view of a barrel in a projector device according to one embodiment, and FIG. 11 is a bottom view of a barrel in a projector device according to one embodiment with a light guide inserted therein.

[0247] 9 to 11, the barrel 210 in the projection device according to the embodiment 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 order along the second direction (Y-axis direction).

[0248] An outer lens may be disposed in the first groove 210h1, and a light guide may be disposed in the second groove 210h2.

[0249] 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 via 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 finally emitted to the display unit.

[0250] 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 via the coupling hole 210ph.

[0251] The barrel 210 may include multiple barrel holes so that light emitted from multiple 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.

[0252] 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.

[0253] Furthermore, the first barrel hole 210h2a, the second barrel hole 210h2b, and the third barrel hole 210h2c may be connected to the second groove 210h2, that is, 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.

[0254] The second barrel hole 210h2b and the third barrel hole 210h2c may also 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, a gripper or the like may be positioned in the grip grooves gr to easily seat the lenses on the outer surface of the light guide.

[0255] The protrusion 210p may extend outward from an 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.

[0256] The barrel 210 may also include a barrel groove 210gr. In the barrel 210, the inner surface of the second groove 210h2 has an outwardly convex barrel groove. Groove 210grThis allows the second spacer to easily come into contact with the inner surface of the barrel 210.

[0257] In addition, in the barrel 210, the size S2 of the second groove 210h2 may be larger than the size S1 of the light guide LG. This facilitates optical alignment with the light guide LG. In the following, the sizes will be described based on the XZ plane.

[0258] The barrel 210 may also include a barrel protrusion 210pr protruding toward the light guide LG on its inner surface. The barrel protrusion 210pr may overlap the second barrel hole 210h2b and the third barrel hole 210h2c in the first direction (X-axis direction).

[0259] 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 seated 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 can be reduced, thereby suppressing damage to the light guide LG. In other words, the reliability of the barrel 210 and the projector device can be improved.

[0260] FIG. 12 is a diagram illustrating the barrel of a projector device according to one embodiment, and explains the coupling of an outer lens, a first spacer, a light guide, a lens, and a second spacer; FIG. 13 is a diagram illustrating the coupling between a barrel, a housing, and an additional housing of a projector device according to one embodiment; and FIG. 14 is a diagram illustrating the coupling between a housing and a light source unit of a projector device according to one embodiment.

[0261] 12 to 14, an outer lens LS may be inserted into a first groove 210h1 of the barrel 210. Furthermore, 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 can prevent the outer lens LS from being detached as described above.

[0262] Furthermore, the light guide LG and the lenses FL1, FL2, and FL3 connected to the light guide LG may be inserted into the second groove 210h2. The light guide LG and the lenses FL1, FL2, and FL3 connected to the light guide LG may be positioned within the second groove 210h2. Furthermore, a second spacer SP2 may be positioned outside the light guide LG and the lenses FL1, FL2, and FL3 connected to the light guide LG. The second spacer SP2 may be in contact with the light guide LG or the lenses (particularly, the first guide lens FL1). This can prevent the light guide LG and the lenses FL1, FL2, and FL3 connected to the light guide LG from coming off.

[0263] The first spacer SP1 and the second spacer SP2 may be arranged in order 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). Furthermore, the outer lens LS, the light guide LG, and the first guide 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 guide lens FL1 in the second direction (Y-axis direction).

[0264] Alternatively, 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. Furthermore, the housing 220 and the barrel 210 may be coupled together in various coupling methods. For example, a protrusion on the housing 220 may be coupled to a coupling hole on the barrel 210. Furthermore, the housing 220 may be positioned below the barrel 210, and the additional housing 240 may be positioned above the barrel 210. An improved coupling force between the barrel 210 and the housing 220 may be maintained through the additional housing 240.

[0265] Furthermore, after the barrel 210 is accommodated in the housing 220, multiple light source units may be inserted into the side of the housing 220. For example, the first light source unit 230a, the second light source unit 230b, and the third light source unit 230c may be located on the side of the housing 220.

[0266] FIG. 15 is a diagram showing the optical system of the projection device according to the first embodiment.

[0267] 15, in the projection device according to the first embodiment, the optical system may include an outer lens LS, a light guide LG, optical members 233a, 233b, and 233c, and a lens FL. Furthermore, in the projection device, the optical system may further include light sources 232a, 232b, and 232c.

[0268] In the following description, the outer lens LS may include N lenses. The N lenses may include, in order of their proximity to the waveguide WG, a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4.

[0269] The light guide LG may also have a hexahedral shape. Thus, the light guide LG may have a first side or first side LGS1 facing the first light source 232a. The light guide LG may have a second side or second side LGS2 facing the second light source 232b. The light guide LG may have a third side or third side LGS3 facing the third light source 232c. The light guide LG may have a fourth lens L4 or No. N The fourth side or fourth side LGS4 may be located toward the lens Ln. Also, the first side to the fourth side may refer to a direction other than a side. For example, the first light source 232a may be located on the first side of the light guide LG.

[0270] The light source side may also be the direction toward the light in the light guide LG. Although the light source side is shown as the direction toward the first light source in the drawings, the light source side may correspond to the direction toward the light source adjacent to the component from the first-side lens to the third-side lens and from the first optical member to the third optical member. For example, the light source side with respect to the second-side lens or the second optical member corresponds to the direction toward the second light source 232b.

[0271] Furthermore, the lenses FL1 to FL3 may include a first-side lens FL1, a second-side lens FL2, and a third-side lens FL3. The above-mentioned first guide lens may correspond to the first-side lens FL1. Furthermore, the first-side lens may be used interchangeably with "lens," "guide lens," etc.

[0272] Also, the target side has an optical guide. DoLG Alternatively, the target side may correspond to the direction from each light source to the waveguide WG with the light travel path as the reference.

[0273] In addition, the first side LGS1 and the fourth side LGS4 of the light guide LG may be opposite to each other or may face each other. G's The second side LGS2 and the third side LGS3 may be opposite surfaces to each other or may face each other.

[0274] For example, the outer lens LS may include three or four lenses. As shown in FIG. 17, the outer lens LS may include three lenses, consisting of a first lens L1 to a third lens L3. In this case, the Nth lens corresponds to the third lens L3. As shown in FIGS. 15 and 16, the outer lens LS may include four lenses, consisting of a first lens L1 to a fourth lens L4. In this case, the Nth lens Ln corresponds to the fourth lens L4.

[0275] The lenses FL may also be disposed on the light guide LG. For example, the lenses FL may be in contact with the light guide LG. The number of such lenses FL may correspond to the number of light sources. For example, the number of lenses FL may be three when there are three light sources. Alternatively, the number of lenses FL may be one when there is one light source.

[0276] The lens FL may be referred to as a "light source lens" or "side lens" hereinafter. The lens FL may include a first side lens FL1, a second side lens FL2, and a third side lens FL3. The first side lens FL1 may be located in a region between the second side lens FL2 and the third side lens FL3. However, the first side lens FL1 does not have to overlap with the second side lens FL2 and the third side lens FL3 in the second direction (Y-axis direction). The first side lens FL1 may be positioned offset from the second side lens FL2 and the third side lens FL3 in the second direction (Y-axis direction). Furthermore, the first side lens FL1 may overlap with the light guide LG in the first direction (X-axis direction). For example, the first side lens FL1 may overlap with the light guide LG in the light emission direction of the first light source 232a.

[0277] Furthermore, the optical members 233a, 233b, and 233c may be disposed between the light source and the light guide LG. For example, the optical members may include a first optical member 233a, a second optical member 233b, and a third optical member 233c. Furthermore, the light source may include a first light source 232a, a second light source 232b, and a third light source 232c.

[0278] The first optical member 233a may be disposed between the first light source 232a and the first side lens FL1. The second optical member 233b may be disposed between the second light source 232b and the second side lens FL2. The third optical member 233c may be disposed between the first light source 232a and the first side lens FL1. Third It may be disposed between the light source 232c and the third side lens FL3.

[0279] The first optical member 233a may be disposed between the second optical member 233b and the third optical member 233c. The first optical member 233a may not overlap the second optical member 233b and the third optical member 233c in the second direction (Y-axis direction). The first optical member 233a may be disposed offset from the second optical member 233b and the third optical member 233c in the second direction.

[0280] As a result, light emitted from the first light source 232a can be provided to the waveguide WG via the first optical member 233a, the first lens FL1, the light guide LG, and the outer lens LS. Light emitted from the second light source 232b can be provided to the waveguide WG via the second optical member 233b, the second lens FL2, the light guide LG, and the outer lens LS. Light emitted from the third light source 232c can be provided to the waveguide WG via the third optical member 233c, the third lens FL3, the light guide LG, and the outer lens LS.

[0281] The first lens L1 may also include a first surface S11 or a first target surface S11 that is the surface on the waveguide WG side. The first lens L1 may also include a second surface S12 or a second target surface S12 that is the surface on the light guide LG side. Surface S12 The second lens L2 may include a third lens element, which is a surface on the waveguide WG side. Surface S21The second lens L2 may include a fourth surface S22 or a fourth target surface S22, which is the surface on the light guide LG side. The third lens L3 may include a fifth surface S31 or a fifth target surface S31, which is the surface on the waveguide WG side. The third lens L3 may include a sixth surface S32 or a sixth target surface S32, which is the surface on the light guide LG side. The fourth lens L4 may include a seventh surface S41 or a fourth target surface S41, which is the surface on the waveguide WG side. The fourth lens L4 may include an eighth surface S42 or an eighth target surface S42, which is the surface on the light guide LG side. Light from multiple light sources may be reflected by the light guide and irradiated toward the diaphragm ST or the waveguide WG via the outer lens LS. In the drawings, it is shown that the light emitted from the first light source 232a is provided to the waveguide via the light guide LG, but as described above, it should be understood that the light emitted from other light sources (second and third light sources) is also reflected by the light guide LG and irradiated toward the waveguide, etc.

[0282] Hereinafter, various embodiments of the present invention will be described based on the above content. Furthermore, the content described below can be similarly applied to other embodiments, except for content that contradicts the content described in other embodiments.

[0283] In the optical system of the projection device according to the first embodiment, the first light source 232a may be disposed on a first side of the light guide LG, and the outer lens LS may be disposed on a fourth side of the light guide LG.

[0284] Furthermore, the first-side lens FL1 may be located between the first side LGS1 of the light guide LG and the first light source 232a. In the embodiment, the first side LGS1 of the light guide LG may overlap with the fourth side LGS4 of the light guide LG in the optical axis direction or the first direction (X-axis direction) of the outer lens LS. In other words, the first side LGS1 and the fourth side LGS4 of the light guide LG may overlap and face each other in the first direction.

[0285] In this embodiment, the first-side lens FL1 may be in contact with the light guide LG. For example, the first-side lens FL1 may be bonded to the first side LGS1 of the light guide LG by a bonding member or the like, or may be formed integrally with the first side LGS1.

[0286] As described above, the outer lens LS may include the first lens L1 to the Nth lens Ln. In an embodiment, the outer lens LS may include the first lens L1 to the fourth lens L4. The first lens L1 may be disposed farthest from the fourth side LGS1 of the light guide LG. The fourth lens L4 may be disposed closest to the fourth side LGS1 of the light guide LG. In other words, the length in the first direction (X-axis direction) between the fourth side LGS1 and the first lens L1 may be greater than the length d4 in the first direction (X-axis direction) between the fourth side LGS1 and the fourth lens L4. The third lens L3 and the second lens L2 may be disposed between the first lens L1 and the fourth lens L4 in the first direction. For example, the third lens L3 may be located between the second lens L2 and the fourth lens L4. The second lens L2 may be disposed between the first lens L1 and the third lens L3.

[0287] In the embodiment, the first lens L1 may have a convex surface opposite to the surface facing the fourth side LGS4 of the light guide LG. That is, the first lens L1 may be convex toward the first direction (X-axis direction). Conversely, the first lens L1 may be concave in the direction opposite to the first direction. In other words, the first surface S11 of the first lens L1 may be concave toward the fourth side LGS4. Furthermore, the first lens L1 may be convex toward the waveguide WG. This allows the light collected by the light guide LG to be easily guided to the light guide plate or the waveguide WG. In other words, the collected light can be efficiently diffused.

[0288] The Nth lens, last lens, or fourth lens L4 may be disposed adjacent to the light guide LG, and the surface facing the fourth side LGS4 may be concave. That is, the eighth surface S42 may be concave toward the light guide LG. Alternatively, the eighth surface S42 may be convex toward the waveguide WG.

[0289] Also, the 7th Surface S41 The seventh surface S43 may be convex towards the light guide LG, and the seventh surface S43 may be concave towards the waveguide or in the first direction.

[0290] Furthermore, the fifth surface S31 may be convex in the first direction. Alternatively, the fifth surface S31 may be concave toward the light guide LG. The sixth surface S32 may be convex in the first direction or toward the waveguide. Alternatively, the sixth surface S32 may be convex in the first direction or toward the waveguide. Alternatively, the sixth surface S32 may be concave toward the light guide LG.

[0291] The third surface S21 may be convex in the first direction or toward the waveguide. Surface S21 may be concave towards the light guide LG.

[0292] The fourth surface S22 may also be convex towards the first direction or towards the waveguide, or alternatively, the fourth surface S22 may be concave towards the light guide LG.

[0293] Also, the first surface S11 may be convex toward the waveguide or the first direction as described above, and the second surface S12 may be convex toward the light guide LG, or alternatively, the second surface S12 may be concave toward the first direction or the waveguide.

[0294] Furthermore, in the embodiment, the surface of the first side lens FL1 adjacent to the first light source 232a may be convex. In other words, the surface of the first side lens FL1 facing the first light source 232a may be convex toward the first light source 232a. Furthermore, the surface of the first side lens FL1 facing the first light source 232a may be concave in the first direction.

[0295] Furthermore, in the embodiment, the refractive power of the first lens L1 may be positive, and the refractive power of the Nth lens Ln or the fourth lens Ln may be negative.

[0296] The composite power of the lenses disposed between the first lens L1 and the Nth lens Ln may be positive or negative, i.e., the composite power of the second lens L2 and the third lens L3 may be positive or negative.

[0297] Furthermore, the second light source 232b may be disposed on the second side of the light guide LG. Also, the third light source 232c may be disposed on the third side of the light guide LG. Also, as described above, the second-side lens FL2 is connected to the second side LGS2 of the light guide LG and the second light source 232c. source 232b The third-side lens FL3 may be disposed between the third side LGS3 of the light guide LG and the third light source 232c.

[0298] In this case, the second side lens FL2 may have a convex surface adjacent to the second light source 232b. Also, the third side lens FL3 may have a convex surface adjacent to the third light source 232c. That is, in the embodiment, the first side lens FL1 to the third side lens FL3 may have convex surfaces facing the light sources that emit light to each side lens.

[0299] The second side LGS2 of the light guide LG may be disposed opposite to the third side LGS3 of the light guide LG with the light guide LG in between, whereby the second-side lens FL2 and the third-side lens FL3 may be disposed opposite to or symmetrical with respect to the light guide LG.

[0300] Each lens may be in contact with the light guide LG. For example, the first lens FL1 may be in contact with or adjacent to the light guide LG. The second lens FL2 may be in contact with or adjacent to the light guide LG. The third lens FL3 may be in contact with or adjacent to the light guide LG.

[0301] The first lens FL1 may have a radius of curvature of 100 mm or more at the optical axis of the surface adjacent to the light guide LG. The optical axis may correspond to the central axis of light emitted to the light guide via each light source. The second lens FL2 may have a radius of curvature of 100 mm or more at the optical axis of the surface adjacent to or contacting the light guide LG. The third lens FL3 may have a radius of curvature of 100 mm or more at the optical axis of the surface adjacent to or contacting the light guide LG.

[0302] As described above, each side lens can be connected to the light guide LG by a contact member or a bonding member. The bonding member can be made of a transparent material and have a refractive index similar to that of the light guide LG or the side lenses. That is, the bonding member can be located between the light guide LG and any one of the first side lens FL1 to the third side lens FL3.

[0303] The size of the side surface of the light guide LG may be the same as or larger than the surface of each side lens adjacent to the light guide LG. In this case, the side surface of the light guide LG may be different in size from the light guides or bonding surfaces F11, F21, and F31 of each side lens, and may have a length in one direction (first direction, second direction, or third direction) that is greater or less than that. For example, the length of the side surface of the light guide LG in one direction (first direction, second direction, or third direction) may be smaller than the length of the side lens (from the first side lens to the third side lens) in one direction (first direction, second direction, or third direction). For example, the length of the side surface of the light guide LG in two directions may be greater than the length of the bonding surfaces of each side surface in two directions. Furthermore, the length of the side surface of the light guide LG in one direction may be smaller than the length of the bonding surfaces of the side lenses in one direction.

[0304] In the embodiment, the surfaces of the side faces adjacent to the light guide LG or the bonding surfaces F11, F21, F31 may be flat. For example, the surface of the first-side lens FL1 adjacent to the light guide LG or the bonding surface F11 and the surface perpendicular to the first direction may be flat.

[0305] Furthermore, a light guide LG may be located between the outer lens LS or the N lenses and each light source (first light source).

[0306] In addition, the first lens according to the embodiment ZL1 The effective diameter of the first lens L1 closest to the waveguide WG may be the largest. That is, of the N lenses, the effective diameter of the first lens L1 closest to the waveguide WG may be the largest. Also, of the N lenses, the effective diameter of the Nth lens (fourth lens) may be the smallest.

[0307] Furthermore, the lens disposed between the first lens L1 and the Nth lens (fourth lens) may have an effective diameter smaller than that of the first lens L1. Furthermore, the lens disposed between the first lens L1 and the Nth lens (fourth lens) may have an effective diameter larger than that of the Nth lens Ln (or the fourth lens L4).

[0308] As described above, the waveguide WG may be disposed so as to face the first lens L1. That is, the waveguide WG may be located adjacent to the first lens L1. Furthermore, an aperture stop ST may be disposed in the waveguide WG. For example, the aperture stop ST may be located in a direction from the first lens L1 toward the waveguide. Alternatively, the aperture stop ST may be located adjacent to the first lens L1. The aperture stop ST may be located corresponding to a contact point between the projector device and the waveguide WG.

[0309] In addition, in the embodiment, at least one of the N lenses may have a surface opposite to the surface facing the light guide LG that is concave toward the light guide LG. For example, the second to fourth lenses may have surfaces S22, S32, and S42 adjacent to the light guide LG that are concave toward the light guide LG.

[0310] Furthermore, the length of the N lenses in the first direction (X-axis direction) may be smaller than the length of the light guide LG in the first direction.

[0311] In addition, the light guide LG and the Nth lens or the fourth lens may be spaced apart or in contact with each other. For example, the light guide LG and the Nth lens (fourth lens) may be coupled to each other. This can reduce flare in the optical system.

[0312] Furthermore, as described above, the fourth lens L4 or the Nth lens has a surface (surface No. 8) adjacent to the light guide LG that is convex toward the waveguide, thereby shortening the length of the outer lens LS. In other words, by placing the waveguide on the object side and the light source on the image side, the TTL of the optical system can be shortened. This makes it easy to miniaturize the optical system or projector device.

[0313] Furthermore, the contents of Table 1 below can be applied to each component of the optical system according to the embodiment.

[0314] [Table 1] JPEG2025526563000044.jpg218160JPEG2025526563000045.jpg97160

[0315] Here, the left column for each lens discloses the details for the surface facing the waveguide, and the right column discloses the details for the surface facing the light source. The left column for each lens discloses the details for the surfaces F11, F21, and F31 facing the light guide, and the right column discloses the details for the surfaces F12, F22, and F32 facing the light source. The thickness of each lens corresponds to the left column. The spacing between adjacent lenses corresponds to the right column. For example, the details for the first surface of the first lens are disclosed in the left column. The details for the second surface of the first lens are disclosed in the right column. The thickness of the first lens may be 1.452 mm, and the distance between the first and second lenses may be 0.103 mm. The units of thickness and length may be mm. Figure 16 is a diagram of the optical system of the projection device according to the second embodiment.

[0316] 16, the projection device according to the second embodiment may include an optical system as described above. In particular, in this embodiment, the optical system may include a diaphragm ST, an outer lens LS, a light guide LG, a side lens FL1, an optical member 233a, and a light source 232a as described in the first embodiment. Furthermore, the above content can be similarly applied, except for the content described below.

[0317] However, in this embodiment, there is one light source, and the optical system is a first light source. source 232a Correspondingly, the optical system may include a first optical unit Material 233a and the first side lens FL1. As a result, the above-mentioned descriptions of the second optical member, the third optical member, the second side lens, the third side lens, the second light source, and the third light source may not apply to this embodiment.

[0318] In addition, in the embodiment, the light source may include only the first light source and may include light sources having various colors or wavelength bands. The first light source may include an RGB light source, for example, an RGB LED. Alternatively, the first light source may include a monochromatic light source (LED) that outputs one of the RGB colors. Alternatively, the first light source may include a light source (LED) that outputs two of the RGB colors.

[0319] FIG. 17 is a diagram showing the optical system of the projection device according to the third embodiment.

[0320] 17, the projection device according to the third embodiment may include the optical system as described above. Similarly, in this embodiment, the optical system may include the aperture ST, outer lens LS, light guide LG, side lens, optical member, and light source as described in the first or second embodiment.

[0321] In particular, in the optical system according to this embodiment, there may be a plurality of light sources (for example, three). Also, there may be a plurality of optical members and side lenses corresponding to the number of light sources. The explanation regarding this can be applied in the same manner as in the first embodiment.

[0322] The outer lens LS may also include multiple lenses. In this case, the outer lens LS according to this embodiment may include a first lens L1, a second lens L2, and a third lens L3. The third lens L3, the second lens L2, and the first lens L1 may be arranged in this order in the first direction (X-axis direction). For example, the first lens L1 may be arranged at the greatest distance from the light guide LG in the outer lens LS. The third lens L3 may be arranged at the smallest distance from the light guide LG in the outer lens LS. The second lens L2 may be arranged between the first lens L1 and the third lens L3.

[0323] This allows the first lens L1, the second lens L2, and the third lens L3 to at least partially overlap one another in the first direction.

[0324] Furthermore, the first surface S11 of the first lens L1 may be convex in the first direction. The second surface S12 may be concave in the first direction. The third surface S21 of the second lens L2 may be convex along the first direction. The fourth surface S22 may be convex or concave in the first direction. The fifth surface S31 of the third lens L3 may be concave in the first direction. The sixth surface S32 of the third lens L3 may be convex in the first direction.

[0325] Furthermore, the distance between the first lens L1 and the second lens L2 may be greater than the distance between the second lens L2 and the third lens L3. Moreover, the distance between the first lens L1 and the second lens L2 may be greater than the distance between the third lens L3 and the light guide LG. Moreover, the distance between the third lens L3 and the light guide LG may be greater than the distance between the second lens L2 and the third lens L3. Furthermore, the contents of Table 2 below can be applied to each component of the optical system according to this embodiment.

[0326] [Table 2] JPEG2025526563000047.jpg223160JPEG2025526563000048.jpg136167

[0327] Here, the left column for each lens discloses details for the surface facing the waveguide, and the right column discloses details for the surface facing the light source. Furthermore, the left column for each lens discloses details for the surfaces F11, F21, and F31 facing the light guide, and the right column discloses details for the surfaces F12, F22, and F32 facing the light source. The thickness of each lens corresponds to the left column. The spacing between adjacent lenses corresponds to the right column. For example, details for the first surface of the first lens are disclosed in the left column. Details for the second surface of the first lens are disclosed in the right column. Furthermore, the left column for each light guide (side lens, optical element) discloses details for the surface facing the waveguide. The right column for each light guide (side lens, optical element) discloses details for the surface facing each light source (e.g., the second light source for the second side lens). Furthermore, with respect to the thickness of the light guide (side lens, optical member), the left column refers to the thickness of the component (length along the first direction or optical axis), and the right column refers to the separation distance in the first direction between the component and the component closest to the light source. For example, the thickness of the first lens may be 1.199690555 mm, and the separation distance between the first lens and the second lens may be 0.460932583 mm.18 is a conceptual diagram of a project device according to another embodiment, FIG. 19 is a perspective view of a project device according to another embodiment, FIG. 20 is an exploded perspective view of a project device according to another embodiment, FIG. 21 is a view taken along line AA′ in FIG. 19, FIG. 22a is a side view of a barrel in a project device according to an embodiment, FIG. 22b is another side view of the barrel in a project device according to an embodiment, FIG. 22c is a cross-sectional view of the barrel in a project device according to an embodiment, FIG. 23a is a side view of a barrel and a housing in a project device according to an embodiment, and FIG. 23b is another side view of the barrel and a housing in a project device according to an embodiment. 23c is a cross-sectional view of the barrel and housing in the project device according to the embodiment, FIG. 24a is one side view of the barrel, housing, and light source assembly in the project device according to the embodiment, FIG. 24b is another side view of the barrel, housing, and light source assembly in the project device according to the embodiment, FIG. 24c is a cross-sectional view of the barrel, housing, and light source assembly in the project device according to the embodiment, FIG. 25 is an enlarged view of the K1 portion in FIG. 21, FIG. 26a is an enlarged view of the K2 portion in FIG. 21, FIG. 26b is a modified example of FIG. 26a, FIG. 26c is another modified example of FIG. 26a, and FIG. 26d is yet another modified example of FIG. 26a.

[0328] 18 to 21, a projector device 200 according to another embodiment includes a barrel 210, a lens L, and a first light guide LG1. The projector device 200 may further include a light source device 220 located in or coupled to an opening OP formed in a side surface of the barrel 210, and an optical signal generator 230 adjacent to the barrel 210. The projector device 200 may further include a cover CV and a substrate (including a connector, not shown) that surround the barrel 210, the light source device 220, and the optical signal generator 230.

[0329] 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 210. For example, the lens L may include a first lens L1 arranged first at the top, a second lens L2 arranged at the rear end of the first lens, and an Nth lens Ln arranged last at the top. Here, N may be a natural number greater than or equal to 2. Furthermore, the Nth lens Ln may be located closest to the optical signal generation unit 230 located at the rear end of the barrel 210 or the rear ends of the plurality of lenses L, among the plurality of lenses L.

[0330] 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 220 is reflected by the optical signal generation unit 230 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 or the present embodiment, the second direction (Y-axis direction) may correspond to the direction from the first light guide LG1 to the second light guide LG2. The first light guide LG1 may be referred to as a first light guide portion and a first guide member. The second light guide LG2 may be referred to as a second light guide portion and a second guide member.

[0331] The barrel 210 may further include a hole corresponding to the opening OP. In an embodiment, the barrel 210 may include a barrel hole or an additional hole 210h. The additional hole 210h may be positioned to face the opening OP. Alternatively, the additional hole 210h may overlap the opening OP in the second direction (Y-axis direction). Alternatively, the distance of the additional hole 210h 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 210h may be positioned in a region on the inner surface of the barrel 210 corresponding to the position of the opening OP. With this configuration, a bonding material can be easily applied to the light source device 220 coupled, inserted, fixed, or connected to the opening OP via the additional hole 210h. This improves the bonding strength between the barrel 210 and the light source device 220. Therefore, the projection device 200 according to the embodiment may have improved durability, durability, or reliability. Alternatively, an optical test of the light source device 220 positioned at the opening OP can be easily performed via the additional hole 210h. Alternatively, the additional holes 210h may facilitate the discharge or ejection of fluid (e.g., air) to the barrel 210 and the light source device 220. The presence or absence of such additional holes 210h may vary depending on the embodiment. For example, the additional holes 210h may be disposed on the side of the barrel 210 as described above. Alternatively, the additional holes 210h may not be present on the side of the barrel 210 in consideration of durability, etc.

[0332] A plurality of lenses L may be located within the barrel 210. A first light guide LG1 may be located within the barrel 210.

[0333] Furthermore, the barrel 210 according to the embodiment may include an opening OP formed on a side surface. The opening OP may have various shapes such as a circle or a polygon. Furthermore, such an opening OP may correspond to the position of the first light guide LG1.

[0334] In the embodiment, the opening OP may overlap the first light guide LG1 in a direction perpendicular to the optical axis. For example, the opening OP may overlap the first light guide LG1 in the second direction. With this configuration, light emitted from the light source device 220 located on the side of the barrel 210 can easily enter the first light guide LG1.

[0335] The first light guide LG1 may also be disposed between two of the multiple 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 located between the first lens L1 and the optical signal generator 230. The first light guide LG1 may also be located between the first lens L1 and the second lens L2, or between the second lens L2 and the Nth lens Ln. Such various positions of the first light guide LG1 will be described in various embodiments below.

[0336] In this embodiment, the first light guide LG1 may be located between the second lens L2 and the Nth lens Ln. This allows the Nth lens Ln to be located between the first light guide LG1 and the optical signal generator 230. This configuration ensures an appropriate optical path when light reflected by the first light guide LG1 is provided to the optical signal generator 230. In addition, refraction of the reflected light is possible. This allows the first light guide LG1 to be made smaller.

[0337] The first light guide LG1 may include a first prism, which may be a polarizing prism or a polarization separating prism.

[0338] The first prism may reflect light of a first polarization and transmit light of a second polarization. For example, a portion of the light (first polarization) provided from the light source device 220 or incident on the first light guide LG1 may be reflected by the first light guide LG1 and provided to the optical signal generator 230. In addition, another portion of the light (second polarization) incident on the first light guide LG1 may be transmitted through the first light guide LG1 and absorbed by the barrel 210.

[0339] Furthermore, light emitted from the light source device 220 may be incident on the first light guide LG1 through the opening OP. For this purpose, as described above, the opening OP may be disposed in the region 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 210 may be the same as that of the first light guide LG1.

[0340] The light source device 220 includes a light source 223 and can generate (generate, provide) or emit light. The light source device 220 according to the embodiment may be located at or coupled to the opening OP. That is, the light source device 220 may be connected to or coupled to the barrel 210.

[0341] The light source device 220 may include a housing 222 including an opening 222h, a second light guide LG2 disposed within the housing 222, and a light source 223 that provides light to the second light guide LG2.

[0342] Furthermore, the light source device 220 may include a light source assembly 221 disposed externally of the light source device 220 and surrounding a housing 222 , a light source lens 224 adjacent to the light source 223 , and an intermediate lens MO located within the housing 222 .

[0343] The light source assembly 221 may be disposed on the outermost side of the light source device 220. If it is difficult to mount the light source 223 inside the housing 222 or if it is necessary to mount an additional lens (light source lens), the light source assembly 221 may be located outside the housing 222. The light source assembly 221 may be an integral part of the housing 222 or a separate structure.

[0344] The housing 222 may include an opening 222h. The housing 222 may be located adjacent to the opening OP of the barrel 210. For example, the opening 222h of the housing 222 may be located corresponding to the opening OP of the barrel 210. This allows the opening 222h of the housing 222 to overlap with the opening OP of the barrel 210 in the second direction (the Y-axis direction).

[0345] The light source 223 may be located within the housing 222 or the light source assembly 221. The light source 223 may emit light. For example, the light emitted from the light source 223 may be incident on a second light guide LG2 within the housing 222. The second light guide LG2 may be located within the housing 222. Thus, the second light guide LG2 may transmit the light emitted from the light source 223 to the opening 222h or the first light guide LG1.

[0346] The number of light sources 223 may be one or more. That is, the light source device 220 may have a single light source 223 or multiple light sources 223. For example, the light source device 220 may have multiple light sources 223, including a first light source 223a, a second light source 223b, and a third light source 223c. The first light source 223a to the third light source 223c may emit light in the same direction or in different directions. For example, the first light source 223a and the third light source 223c may be positioned to face each other. The first light source 223a and the third light source 223c may be positioned to overlap in the first direction (X-axis direction). A second light guide LG2 may be positioned between the first light source 223a and the third light source 223c. This allows the second light guide LG2 to overlap the first light source 223a and the third light source 223c. The second light source 223b may be positioned between the first light source 223a and the third light source 223c. The first light source 223a to the third light source 223c can emit light toward the second light guide LG2. The second light source 223b may overlap the second light guide LG2 in the second direction. With this configuration, the projector device 200 can have a compact light source device 220.

[0347] Furthermore, the first light source 223a, the second light source 223b, and the third light source 223c can emit light of wavelengths or colors that are partially the same or different from one another. For example, the first light source 223a, the second light source 223b, and the third light source 223c can emit red, green, and blue light, respectively.

[0348] The second light guide LG2 may include a second prism. The second prism may include, for example, an X-prism as a reflective member. In an embodiment, the second light guide LG2 or the second prism may have a structure in which at least two or more prisms are combined.

[0349] The second prism may also include at least two or more coated surfaces (reflective members or reflective sheets). One of these at least two or more coated surfaces may reflect light of a first wavelength and light of a second wavelength, and transmit light of a third wavelength. That is, the coated surface may reflect light of a predetermined wavelength band. This allows light of a desired wavelength band to be reflected by the second light guide LG2 for each of the light beams emitted from the multiple light sources 223. For example, light passing through the second light guide LG2 may be provided to the first light guide LG1 or the intermediate lens MO.

[0350] The light source lens 224 may be located adjacent to the light source 223. For example, there may be a plurality of light source lenses 224. The light source lenses 224 may be located on the path of the light emitted from each light source 223.

[0351] In the embodiment, the light source lens 224 may be located between the second light guide LG2 and the light source 223. Also, there may be a plurality of light source lenses 224. A plurality of light source lenses 224 may be located between the second light guide LG2 and the light source 223. Alternatively, there may be a plurality of light source lenses 224 corresponding to each of the plurality of light sources 223.

[0352] For example, the light source lens 224 may include a first light source lens 224a, a second light source lens 224b, and a third light source lens 224c. The first light source lens 224a may be located between the first light source 223a and the second light guide LG2. The second light source lens 224b may be located between the second light source 223b and the second light guide LG2. The third light source lens 224c may be located between the third light source 223c and the second light guide LG2.

[0353] Furthermore, each of the first light source lens 224a, the second light source lens 224b, and the third light source lens 224c may be located multiple times on the first light source 223a, the second light source 223b, and the third light source 223c, respectively. For example, any one of the multiple first light source lenses 224a may be located on the first light source 223a and coupled to the light source assembly 221. Furthermore, another of the multiple first light source lenses 224a may be located between any one of the first light source lenses 224a and the second light guide LG2 and coupled to the housing 222.

[0354] Additionally, the first light source lens 224a, the second light source lens 224b, and the third light source lens 224c may include a collimating lens or a collimator.

[0355] Furthermore, the light source assembly 221 may be provided with a substrate 225 connected to the light source 223. There may be at least one substrate 225 corresponding to the light source 223. For example, the multiple substrates 225 may include a first substrate 225a, a second substrate 225b, and a third substrate 225c. As described above, the multiple substrates 225 may be integrated into one substrate, or there may be multiple substrates corresponding to the number of light sources.

[0356] The board 225 may also be electrically connected to a control unit or processor in the frame (or display unit) described above. To this end, the board 225 may include a connector for communication with an external device or a connected device. Furthermore, the board 225 is disposed outside the light source 223, and can discharge heat generated by the light source to the outside. This can improve the reliability of the light source device 220.

[0357] The intermediate lens MO may be located between the opening 222h and the second light guide LG2, and the intermediate lens MO may be located between the first light guide LG1 and the second light guide LG2.

[0358] The intermediate lens MO may include multiple lenses, for example, a first intermediate lens MO1 and a second intermediate lens MO2. However, as will be described later, light reflected by the second light guide LG2 may be provided directly to the first light guide LG1 without passing through the intermediate lens MO.

[0359] 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 223 may pass through the second light guide LG2 and then through the second surface MO1s2 and the first surface MO1s1.

[0360] The second surface MO1s2 may be convex toward the second light guide LG2. Alternatively, the second surface MO1s2 may be concave toward the first light guide LG1. Furthermore, the first surface MO1s1 may be convex or concave toward the second light guide LG2. For example, the first intermediate lens MO1 may have a meniscus shape. Since the second surface MO1s2 is convex toward the second light guide LG2, light can be concentrated while passing through the intermediate lens MO. This can improve the uniformity of the light provided to the optical signal generator 230. In other words, the light incident on the optical signal generator 230 may be surface light. Furthermore, the uniformity of the surface light can be improved. This can improve the accuracy or resolution of the video signal or image output to the display unit via the projection device 200 according to the embodiment.

[0361] The second intermediate lens MO2 may include a microlens array (MLA), which can partially homogenize and planarize the light that has passed through the second light guide LG2.

[0362] Furthermore, the second intermediate lens MO2 may be different in size from the second light guide LG2. Also, the first intermediate lens MO1 may be different in size from the second light guide LG2. For example, No. 2 The intermediate lens MO2 may be large compared to the second light guide LG2.

[0363] Furthermore, the positions of the multiple lenses L, the intermediate lens MO, and the light source lens 224 may be maintained by spacers SP. For example, multiple spacers SP may be present adjacent to the multiple lenses L inside the barrel 210. Furthermore, multiple spacers SP adjacent to the intermediate lens MO and the light source lens 224 may be disposed in the housing 222 of the light source device 220 or the light source assembly 221. In an embodiment, the multiple spacers SP are disposed on the upper or lower side of the above-mentioned lenses, and can fix or maintain the positions of the lenses.

[0364] The optical signal generation unit 230 may be located at the rear end of the barrel 210. The optical signal generation unit 230 may overlap the lens L in the optical axis direction or the first direction (X-axis direction).

[0365] The optical signal generator 230 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.

[0366] The optical signal generator 230 can reflect the light (first polarization) reflected by the first light guide LG1. The optical signal generator 230 can generate an optical signal including video information. That is, the light reflected by the optical signal generator 230 may be light including video information.

[0367] The optical signal generating unit 230 may include a liquid crystal on silicon (LCoS) display.

[0368] A silicon liquid crystal display device may have a structure in which liquid crystal is placed between a silicon wafer (a thin disk that is used as a semiconductor material) having a CMOS (Complementary Metal-Oxide Semiconductor) array and an anti-reflection (AR) member coated with a transparent electrode (Indium Tin Oxide, ITO).

[0369] Alternatively, an alignment layer may be formed on a wafer (silicon wafer) to form an initial alignment of the liquid crystal.

[0370] Additionally, a reflective layer or reflective electrode formed of an aluminum layer and having high optical reflectivity may be located below the alignment layer. The reflective electrode may be located on a silicon wafer. A semiconductor array (CMOS array) may also be formed on the silicon wafer. Such a semiconductor array may transmit data signals through the panel.

[0371] The optical signal generator 230 can reflect at least a portion of the light incident thereon when driven. The optical signal generator 230 can also reflect the light incident on the surface light source for each pixel. The intensity of the reflected light can also be adjusted according to the degree of modulation. For example, the optical signal generator 230 can partially modulate a first polarized light into a second polarized light. The light modulated into the second polarized light can then be provided to the display unit (or waveguide) via the first light guide LG1 and the first lens L1.

[0372] That is, the optical signal generator 230 can modulate the retardation of modulated light, i.e., polarized light. The optical signal generator 230 can perform the delay of the first polarized light in various ways. That is, the voltage for each pixel (voltage adjustment of the electrodes) can be adjusted to form an electric field. Also, the degree of twist of the liquid crystal can be adjusted according to the adjusted voltage. For example, at the maximum voltage, the light reflected by the optical signal generator 230 can be entirely reflected by the first light guide LG1. Also, at the minimum voltage, the light reflected by the optical signal generator 230 can be entirely reflected by the first light guide LG2. No. 1 All light can be transmitted through the first light guide LG1. However, depending on the electric field, this may be reversed. Also, when a medium voltage is applied, some 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 may be medium.

[0373] In this manner, the optical signal generated by the optical signal generator 230 may be transmitted to the first lens L1 via the Nth lens Ln and the first light guide LG1. Furthermore, at least a portion of the optical signal generated by the optical signal generator 230 may pass through the first lens L1 and enter the display unit.

[0374] Furthermore, a transparent member 240 may be further disposed between the optical signal generating unit 230 and the Nth lens Ln (or the first light guide). The transparent member 240 may be made of glass. The transparent member 240 may be combined with the barrel 210 or the cover CV. Furthermore, the transparent member 240 may be positioned on the optical signal generating unit 230. This makes it possible to easily block foreign matter from entering the optical signal generating unit 230. Furthermore, the transparent member 240 may be the same size as or different from the optical signal generating unit 230. Furthermore, the transparent member 240 may overlap at least a portion of the optical signal generating unit 230 in the optical axis direction or the first direction (X-axis direction).

[0375] 22a to 22c, the barrel 210 in the projection device according to the embodiment includes a hole as described above and may further include a side opening OP that may expose a hole extending in a first direction within the barrel 210.

[0376] For example, the barrel 210 may be connected to or adjacent to a waveguide on one side of the hole extending in the first direction, and the barrel 210 may be connected to or adjacent to the optical signal generator 230 on the other side of the hole extending in the first direction.

[0377] The above-mentioned first light guide LG1 may be located inside such a barrel 210. The first light guide LG1 may partially overlap with the opening OP in the second direction. The opening OP may at least partially overlap with the first light guide LG1 in the second direction. Furthermore, the opening OP may have a length in the first direction greater than that of the first light guide LG1.

[0378] The barrel 210 may also include a barrel protrusion 210p extending outward adjacent to the opening OP. Alternatively, the barrel 210 may also include a barrel protrusion 210p protruding outward. The barrel protrusions 210p may be arranged symmetrically with respect to the opening OP. The barrel protrusions 210p may also overlap in the first direction. This may improve the coupling strength between the barrel 210 and the housing and light source assembly, which will be described later.

[0379] Furthermore, the opening OP may have the greatest length in the second and third directions in the first region AR1 of the barrel 210. The first region AR1 may correspond to a region located above the last lens in the barrel 210. The second region AR2 may be adjacent to the optical signal generation unit 230 below the first region AR1. In other words, the second region AR2 may be located between the first region AR1 and the optical signal generation unit 230.

[0380] In the embodiment, the second region AR2 may have a length d2 or a diameter in the second direction that is greater than the length d1 or the diameter in the second direction of the first region AR1. Furthermore, the second region AR2 may at least partially overlap with the housing and the light source assembly in the first direction.

[0381] The above-mentioned barrel protrusion 210p may be located in the first region AR1. Furthermore, the first light guide LG1 may also be located in the first region AR1. Furthermore, the opening OP may also be located in the first region AR1.

[0382] The barrel 210 may also include a protrusion 210PT that protrudes outward. The protrusion 210PT may be located in the first region AR1. Furthermore, the protrusion 210PT may be located in correspondence with the first light guide LG1 inside the barrel 210.

[0383] In an embodiment, the barrel 210 may include a depression or groove on a portion of the inner surface thereof due to the protrusion 210PT. That is, the protrusion 210PT may be located corresponding to an edge (corner) or vertex of the first light guide LG1 located inside the barrel 210. Alternatively, the protrusion 210PT may have a shape corresponding to the shape of the hexahedral first light guide LG1. This can improve the ease of assembly between the first light guide and the barrel.

[0384] The protrusion 210PT may overlap the opening OP in the second direction.

[0385] In addition, protrusions or the like may be located in certain regions of the opening OP. Furthermore, the inner surface OPIS of the opening OP may have a plurality of steps or height differences ST. Such protrusions and height differences ST of the opening OP allow the spacer to be easily positioned in the opening OP. In other words, the bonding strength between the spacer and the barrel can be improved.

[0386] Furthermore, the ease of assembling the light source device and the opening OP (or barrel) can be improved.

[0387] 23 to 23c, the housing 222 in the light source device 220 according to the embodiment has a housing protrusion 22 protruding outward. 2p The barrel protrusion 210p may protrude from the outer surface of the barrel 210 toward the light source device 220. That is, the barrel protrusion 210p may extend or protrude from the outer surface of the barrel 210 in the second direction.

[0388] Alternatively, the housing protrusion 222p of the housing 222 may extend or protrude in a first direction from the housing 222. In other words, the housing protrusion 222p may extend in a direction perpendicular to the barrel protrusion 210p.

[0389] As described above, the light source device 220 may be coupled to the barrel 210 at the side of the opening OP. Such a light source device 220 may include a light source, a housing 222, a light source assembly, and the like.

[0390] Furthermore, the opening 222h of the housing 222 may face the opening OP. For example, the opening 222h of the housing 222 may overlap with the opening OP in the second direction. Furthermore, the opening 222h of the housing 222 and the opening OP may have different sizes. For example, the opening 222h of the housing 222 may be smaller than the opening OP. This allows the light reflected via the second light guide LG2 to be provided into the barrel with high efficiency.

[0391] The housing protrusion 222p may include a protrusion hole 222ph. The barrel protrusion 210p may at least partially penetrate the housing protrusion 222p. That is, the barrel protrusion 210p may be located within the protrusion hole 222ph. This configuration can improve the bonding strength between the housing 222 and the barrel 210.

[0392] Also, a part of the protrusion hole 222ph may be exposed. For example, the housing protrusion 222p may include a protrusion hole 222ph extending in the second direction. Also, a part of the housing protrusion 222p may be removed. That is, the housing protrusion 222p may further include an exposing groove. The protrusion hole 222ph may be exposed by such an exposing groove. Furthermore, Protrusion hole 2 The housing 222 may be plural and may overlap each other in the first direction, so that the housing 222 can be easily coupled with the barrel 210 and the barrel protrusion 210p while moving in the second direction.

[0393] Additionally, a second light guide LG2 may be located within the housing 222, as described above.

[0394] The housing 222 may also include at least one housing hole 222ha, 222hb, 222hc corresponding to the second light guide LG2. In an embodiment, the number of housing holes may vary depending on the number of light sources. The following description will be given based on the number of housing holes and the number of light sources being three.

[0395] The housing holes may include a first housing hole 222ha, a second housing hole 222hb, and a third housing hole 222hc. The first housing hole 222ha, the second housing hole 222hb, and the third housing hole 222hc may be positioned to correspond to each surface of the second light guide LG2.

[0396] Furthermore, a lens may be located in each of the first housing hole 222ha, the second housing hole 222hb, and the third housing hole 222hc.

[0397] 24a-24c, a light source device 220 according to an embodiment may include a light source assembly 221 surrounding a housing 222, as described above.

[0398] The light source assembly 221 may also include an assembly protrusion 221p disposed within the protrusion hole 222ph. The light source assembly 221 may also include an assembly protrusion 221p surrounding the outside of the housing 222 and extending within the protrusion hole 222ph of the housing 222. The assembly protrusion 221p may extend along the second direction. For example, the assembly protrusion 221p may at least partially penetrate the protrusion hole 222ph. This configuration may improve the coupling strength between the light source assembly 221, the housing 222, and the barrel 210. Alternatively, the coupling strength between the light source device 220 and the barrel 210 may be improved.

[0399] In addition, the assembly protrusion 221p may face the barrel protrusion 210p. That is, the assembly protrusion 221p may overlap the barrel protrusion 210p in the second direction. In addition, the assembly protrusion 221p may overlap the area exposed by the protrusion hole 222ph in the first direction. That is, the assembly protrusion 221p may be located on the area exposed by the protrusion hole 222ph. This allows the light source assembly 221 to be easily assembled with the housing 222 and the barrel 210, and also improves the bonding strength between the housing and the barrel.

[0400] In addition, the assembly protrusions 221p may be plural in number corresponding to the barrel protrusions 210p, and the plural assembly protrusions 221p may overlap each other in the first direction, thereby providing a uniform bonding force and improving the reliability of the projector or light source assembly.

[0401] The housing 222 may also include at least one housing hole corresponding to the second light guide LG2. As described above, the housing holes may include the first housing hole 222ha, the second housing hole 222hb, and the third housing hole 222hc.

[0402] Correspondingly, the light source assembly 221 may include at least one assembly hole corresponding to the second light guide LG2 or the housing hole.

[0403] There may be a plurality of assembly holes, for example, the assembly holes may include a first assembly hole 221ha, a second assembly hole 221hb, and a third assembly hole 221hc.

[0404] The first assembly hole 221ha, the second assembly hole 221hb, and the third assembly hole 221hc may correspond to each surface of the second light guide LG2. Also, the first assembly hole 221ha, the second assembly hole 221hb, and the third assembly hole 221hc may be located corresponding to the first housing hole 222ha, the second housing hole 222hb, and the third housing hole 222hc, respectively.

[0405] For example, the first assembly hole 221ha, the second assembly hole 221hb, and the third assembly hole 221hc may be positioned to face the first housing hole 222ha, the second housing hole 222hb, and the third housing hole 222hc, respectively.

[0406] The first housing hole 222ha, the third housing hole 222hc, the first assembly hole 221ha, and the third assembly hole 221hc may at least partially overlap in the first direction or the optical axis. The second housing hole 222hb and the second assembly hole 221hb may at least partially overlap in the second direction. Furthermore, the second housing hole 222hb and the second assembly hole 221hb may also overlap in the second direction with the opening OP and the opening 222h of the housing 222.

[0407] At least one assembly hole may be connected to another. For example, the first assembly hole 221ha, the second assembly hole 221hb, and the third assembly hole 221hc may be connected to one another in at least a portion of their area.

[0408] More specifically, the assembly holes (first to third assembly holes) may be composed of multiple holes depending on their positions. For example, the assembly holes may include a first hole 221gv3, a second hole 221gv2 disposed outside the first hole 221gv3, and a third hole 221gv1 disposed outside the second hole 221gv2. That is, each of the first to third assembly holes may include the first hole 221gv3 to the third hole 221gv1. In this case, the third holes 221gv1 disposed in each assembly hole may be connected to each other.

[0409] For example, the first hole 221gv3 may be located closer to the second light guide LG2 or the housing 222 than the second and third holes. Alternatively, the first hole 221gv3 may be located closest to the second light guide LG2 or the housing 222 than the second and third holes.

[0410] Furthermore, the third holes 221gv1 may be larger than the second holes 221gv2 and the first holes 221gv3. For example, the area of the third holes 221gv1 may be larger than the area of at least one of the second holes 221gv2 and the first holes 221gv3.

[0411] This allows a lens to be easily mounted in the first hole 221gv3. Furthermore, a light source can be positioned in the second hole 221gv2, and a board 225 can be positioned in the third hole 221gv1. That is, the ease of assembling the light source assembly 221 with other components (lens, light source, board) can be improved.

[0412] Furthermore, the substrate can be easily seated in the third hole 221gv1, which is the outermost one of the assembly holes of the light source assembly 221. That is, the bonding strength between the substrate and the light source assembly can be improved. Also, a plurality of third holes 221gv1 may be integrally connected. For this purpose, the substrate may have flexibility in some areas. For example, the substrate may include a flexible printed circuit board (FPCB), a rigid printed circuit board (RPCB), a flexible rigid printed circuit board (FRPCB), etc.

[0413] The substrate may also be a flexible printed circuit board in the curved region. Furthermore, by placing the substrate within the integrally formed third hole 221gv1, heat generated by the light source can be easily dissipated to the outside via the substrate. This improves the reliability of the light source device or projector.

[0414] Furthermore, the light source assembly 221 may include a step portion 222ST formed in a region adjacent to the second region AR2. That is, the size of the barrel may vary depending on the size of the lens (Nth lens Ln) disposed between the first light guide of the barrel and the optical signal generator 230. In this case, the light source assembly 221 has the step portion 222ST corresponding to such a size variation, thereby improving the ease of assembly of the light source assembly and the barrel. For example, the step portion 222ST may be located in a region of the light source assembly 221 adjacent to the barrel 210 and overlapping with the second region AR2 in the first direction.

[0415] Figure 2 5 Further consideration, the light beams La, Lb, and Lc emitted from the light sources 223 of the light source device 220 can pass through the light source lens 224, the second light guide LG2, and the intermediate lens MO. source 223c The first light La, the second light Lb, and the third light Lc emitted from each of these can be emitted in the same direction by the second light guide LG2.

[0416] For example, the second light guide LG2 may include a first coated surface LG2a and a second coated surface LG2b. As described above, one of these at least two or more coated surfaces can reflect a portion of light of a first wavelength, a second wavelength, and a third wavelength. For example, the first wavelength includes a wavelength band of red light, the second wavelength includes a wavelength band of green light, and the third wavelength includes a wavelength band of blue light.

[0417] 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.

[0418] 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.

[0419] As a result, in the second light guide LG2, the first light La can be reflected by or incident on the intermediate lens MO or the opening OP. Also, in the second light guide LG2, the second light Lb can be reflected by or incident on the intermediate lens MO or the opening OP. Also, in the second light guide LG2, the third light Lc can be reflected by or incident on the intermediate lens MO or the opening OP.

[0420] This allows the light IL (or La, Lb, Lc) emitted from the light source 223 to be incident on the first light guide LG. At this time, the light incident on the first light guide LG may be the first incident light IL.

[0421] 26a, 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, can be provided to the optical signal generator 230 via the Nth lens Ln. The second polarization ILb can be absorbed in the barrel 210 or provided to the additional hole 210h.

[0422] 26b, the optical signal generating unit 230 can reflect the first polarized light ILa by adjusting the voltage, as described above. In the embodiment, the first polarized light ILa reflected by the optical signal generating unit 230 will be hereinafter referred to as reflected polarized light.

[0423] In this way, the first light guide LG1 can reflect at least a portion of the light IL emitted from the light source 223 and incident on the first light guide to the Nth lens (or the optical signal generator). That is, the reflected polarized light may be at least partially reflected by the first light guide LG1. However, as described above, the reflected polarized light may be entirely reflected or transmitted by the first light guide LG1 depending on the voltage applied by the optical signal generator 230. The following description will be based on the assumption that at least a portion of the reflected polarized light is transmitted by the first light guide LG1.

[0424] The reflected polarized light may include a first reflected polarized light ILaa transmitted through the first light guide LG1 and a second reflected polarized light ILab reflected by the first light guide LG1. As described above, the intensity of the first reflected polarized light ILaa, i.e., the degree of transmission of the reflected polarized light, may be adjusted in accordance with the image provided to the display unit.

[0425] Furthermore, the projector device 200 according to the embodiment may further include a display unit disposed in front of the first lens L1 and configured to display an image based on an optical signal including image information transmitted to the first lens L1. In other words, the projector device 200 may be integrated with the display unit. However, the following description will be given assuming that the projector device 200 is separated from the display unit.

[0426] 26b, the barrel 210 may further include an additional hole 210h on the side surface. For example, a second polarization may be provided in the additional hole 210h. The following description of the modification can be applied in the same manner as the description of the other embodiments described above.

[0427] 26c, according to other variations, the positions of the lenses and the first light guide LG1 in the barrel 210 may be different. Except for the content described below, the content described in each embodiment of this specification is applicable.

[0428] In this example, the second lens L2 may be disposed between the first lens L1 and the Nth lens Ln among the multiple lenses L. The second lens L2 may also be disposed between the first light guide LG1 and the Nth lens Ln.

[0429] At least a portion of the optical signal generated by the optical signal generating unit 230 may pass through the second lens L2 before being transmitted through or reflected by the first light guide LG1. That is, a portion of the light reflected by the first light guide LG1, for example, polarized light, may pass through the second lens L2 before passing through the first light guide LG1.

[0430] 26d, unlike the projection devices in other embodiments, and according to other variations, the positions of the lenses and the first light guide LG1 in the barrel 210 may be different. Except for the content described below, the content described in each embodiment of this specification is applicable.

[0431] Furthermore, in a projection device according to another modification, the intermediate lens MO may not be present between the first light guide LG1 and the second light guide LG2, which can prevent a decrease in light efficiency due to partial light absorption.

[0432] Furthermore, at least one of the first intermediate lens and the second intermediate lens does not have to be present. For example, only the second intermediate lens (or the first intermediate lens) may be present between the first light guide LG1 and the second light guide LG2.

[0433] Furthermore, the projector device may further include a third light guide disposed between the first light guide and the second light guide. The third light guide may include a prism or the like. Such a third light guide can change the path of light. This allows the path of light to be easily changed in accordance with the shape of the projector device.

[0434] Furthermore, the projector device may provide the above-mentioned video signal through one light source without using the second light guide. That is, only one light source may provide one light to the display unit. For example, when only information is to be provided to the user, the light source device may have only one light source.

[0435] The light source may also emit two lights, for example, two of red, green, and blue, or the light may include white light.

Claims

1. A light guide; a first light source disposed on a first side of the light guide; a lens group disposed on a fourth side of the light guide; a first-side lens disposed between the first side of the light guide and the first light source; the first side of the light guide overlaps with the fourth side of the light guide in the optical axis direction of the lens group; The first-side lens contacts the light guide.

2. the lens group includes a first lens to an Nth lens, the first lens is disposed farthest from the fourth side of the light guide, and a surface opposite to a surface facing the fourth side is convex; the Nth lens is disposed closest to the light guide, and a surface facing the fourth side of the light guide is concave; the first-side lens has a convex surface adjacent to the first light source, the power of the first lens is positive; The power of the Nth lens is negative, The projection apparatus according to claim 1 , wherein a composite power of the lenses between the first lens and the Nth lens is positive or negative.

3. a second light source disposed on a second side of the light guide; a third light source disposed on a third side of the light guide; a second side lens disposed between the second side of the light guide and the second light source; a third-side lens disposed between the third side of the light guide and the third light source; the second-side lens has a convex surface adjacent to the second light source, the third lens has a convex surface adjacent to the third light source, The projector device according to claim 1 , wherein the second side of the light guide is disposed opposite to the third side of the light guide across the light guide.

4. the first-side lens contacts the light guide; The projection device according to claim 1 , wherein the first-side lens has a radius of curvature of 100 mm or more at the optical axis of a surface adjacent to the light guide.

5. The projector apparatus of claim 1 , wherein the light guide and the first-side lens are in contact with each other by an adhesive.

6. The projection apparatus of claim 1 , wherein the side of the light guide is larger than or equal to the surface of the first-side lens adjacent to the light guide.

7. The projection device according to claim 1 , wherein the first-side lens has a flat surface adjacent to the light guide.

8. N lenses and a first light source; a light guide disposed between the N lenses and the first light source; a first side lens disposed between the light guide and the first light source; Among the N lenses, a first lens disposed farthest from the light guide has a convex surface opposite to a surface facing the light guide, A projection device, wherein the Nth lens arranged closest to the light guide has a concave surface facing the light guide.

9. Among the N lenses, the first lens has the largest effective diameter, Among the N lenses, the Nth lens has the smallest effective diameter, The projection device according to claim 8 , wherein the lens disposed between the first lens and the Nth lens has an effective diameter smaller than that of the first lens and larger than that of the Nth lens.

10. The projector device according to claim 8 , wherein the first light source is an RGB LED or a single-color LED of either RGB.

Images