Projection equipment and electronic devices including the same

Abstract

The embodiment discloses a projecting apparatus comprising: a barrel in which a group of lenses is arranged; an optical guide disposed within the barrel; a light source that emits light into the optical guide; a lens disposed between the light source and the optical guide; and a masking layer disposed between the optical guide and the lens or between the optical guide and the group of lenses; wherein the masking layer is disposed along the edge of the outer surface of the optical guide.

Description

Technical Field

[0001] The embodiments relate to a projection device and an electronic device including the same.

Background Art

[0002] Virtual Reality (VR) refers to an artificial technology created using a computer or the like, which is similar to but not actual, a specific environment or situation, or the technology itself.

[0003] Augmented Reality (AR) refers to a technology that synthesizes virtual things and information into the actual environment so that they appear to be things existing in the original environment.

[0004] Mixed Reality (MR) or Hybrid reality refers to creating a new environment or new information by combining the virtual world and the real world. In particular, it refers to something that can interact in real time between what exists in reality and in virtuality in real time.

[0005] At this time, the created virtual environment, situation, etc. stimulate the user's five senses to create a spatial and temporal experience similar to the actual one, enabling the user to freely cross the boundary between reality and imagination. In addition, the user can not only simply immerse themselves in such an environment, but also interact with what is embodied in such an environment by using real devices to add operations and commands.

[0006] Recently, research on equipment (gear, device) used in such technical fields has been actively conducted. However, there is an emerging need for miniaturization and improvement of optical performance for such equipment.

Summary of the Invention

Problems to be Solved by the Invention

[0007] The embodiment provides a projection apparatus and electronic device used in applications such as Augmented Reality (AR), in which stray light is eliminated because total internal reflection does not occur on the outer surface of the optical guide (e.g., a prism) through an optical guide having a masking layer.

[0008] Furthermore, through masking, we can provide projecting equipment and electronic devices with improved optical performance, such as reduced flare.

[0009] Furthermore, it is possible to provide projecting equipment and electronic devices that facilitate miniaturization of the light source through the guide lens and length ratio.

[0010] The embodiment provides a projection apparatus and electronic device used in applications such as Augmented Reality (AR), in which stray light is eliminated because total internal reflection does not occur on the outer surface of the optical guide (e.g., a prism) by adding a guide lens coupled to the outer surface of the optical guide.

[0011] Furthermore, by adding a guide lens to the outer surface of the optical guide to further suppress total internal reflection, it is possible to provide projecting equipment and electronic devices with improved optical performance, such as reduced flare.

[0012] Furthermore, the lens bonding process facilitates manufacturing, enabling the provision of project equipment and electronic devices with improved optical performance, such as reduced flare.

[0013] The problems that the examples attempt to solve are not limited to those described here, and can also include the objectives and effects that can be understood from the means of solving the problems and the embodiments described below. [Means for solving the problem]

[0014] The project apparatus according to the embodiment includes a barrel on which a group of lenses is arranged; an optical guide arranged inside the barrel; a light source that emits light into the optical guide; a lens arranged between the light source and the optical guide; and a masking layer arranged between the optical guide and the lens or between the optical guide and the group of lenses, wherein the masking layer is arranged along the edge of the outer surface of the optical guide.

[0015] The outer surface of the optical guide may include a first to third outer surface facing the light source, and a fourth outer surface facing the lens group.

[0016] The masking layer may be placed on at least one of the first to fourth outer surfaces.

[0017] The masking layer may include a first masking layer to a fourth masking layer, each of the first to fourth outer surfaces.

[0018] A bonding member disposed between the optical guide and the lens or between the optical guide and the lens group may further be included.

[0019] The bonding member can come into contact with the masking layer, the lens, and the optical guide.

[0020] The masking layer can be in contact with the outer surface of the lens or the optical guide.

[0021] The optical guide includes a fifth outer surface and a sixth outer surface, and the fifth outer surface and the sixth outer surface may be outer surfaces of the optical guide other than the first to fourth outer surfaces.

[0022] The masking layer may include a first masking layer to a fourth masking layer arranged on the first outer surface to the fourth outer surface.

[0023] The fifth masking layer disposed on the fifth outer surface and the sixth masking layer disposed on the sixth outer surface; may be included.

[0024] The fifth masking layer and the sixth masking layer may be disposed on the front surfaces of the fifth outer surface and the sixth outer surface.

[0025] The lengths of the long sides and cross-sections of the masking layer may be different from each other.

[0026] The light emitted from the light source may be incident on the first to third outer surfaces, exit from the fourth outer surface, and be provided toward the lens group.

[0027] The first to fourth masking layers include an opening region, and the opening region may correspond to the size of the light source.

[0028] The size of the opening region may be larger than the light-emitting surface of the light source.

[0029] The thickness of the region where any one of the first to fourth masking layers contacts an adjacent other masking layer may be larger than the thickness of the region where it contacts the rest.

[0030] The lens may include a first guide lens adjacent to the first outer surface; a second guide lens adjacent to the second outer surface; and a third guide lens adjacent to the third outer surface.

[0031] The refractive powers of the first to third guide lenses may be positive or negative.

[0032] The masking layer, the first to fourth masking layers each include a first region, a third region positioned to face the first region, a second region positioned between the first region and the third region, and a fourth region positioned between the first region and the third region and arranged to face the second region. The thicknesses of the first to fourth regions of each of the first to fourth masking layers may differ from each other.

[0033] The project apparatus according to the embodiment includes a barrel on which a group of lenses is arranged; an optical guide arranged within the barrel; a light source that emits light into the optical guide; and a lens arranged between the group of lenses and the optical guide or between the light source and the optical guide; wherein the lens is coupled to the optical guide.

[0034] The ratio of the refractive index of the lens to the refractive index of the optical guide can be between 1:0.98 and 1:1.02.

[0035] The outer surface of the optical guide may include a first to third outer surface facing the light source, and a fourth outer surface facing the lens group.

[0036] The lens includes at least one guide lens, and the at least one guide lens may be positioned on at least one of the first to fourth outer surfaces.

[0037] The lens may include a first guide lens disposed on the first outer surface; a second guide lens disposed on the second outer surface; a third guide lens disposed on the third outer surface; and a fourth guide lens disposed on the fourth outer surface.

[0038] The first guide lens, the second guide lens, and the third guide lens can have the same radius of curvature on the surface facing the light source or the surface facing the optical guide.

[0039] The first guide lens, the second guide lens, and the third guide lens may have a concave or convex surface facing the light source.

[0040] The fourth guide lens may have a positive or negative radius of curvature on the surface facing the lens group.

[0041] The lens may be made of the same material as the optical guide.

[0042] The invention further includes a bonding member disposed between the lens and the optical guide; wherein the refractive index of the bonding member may be in ratio with the refractive index of the optical guide or lens of 1:0.98 to 1:1.02.

[0043] The material of the joining member may be the same as the material of the lens.

[0044] The optical guide includes a fifth outer surface and a sixth outer surface, and the fifth outer surface and the sixth outer surface may be outer surfaces of the optical guide other than the first to fourth outer surfaces.

[0045] The lens may further include a fifth guide lens disposed on the fifth outer surface and a sixth guide lens disposed on the sixth outer surface.

[0046] The fifth guide lens and the sixth guide lens may have different thicknesses from the first to third guide lenses.

[0047] The first to third guide lenses may have different thicknesses from the fourth guide lens.

[0048] The projecting apparatus according to the embodiment includes a barrel on which a group of lenses is arranged; an optical guide arranged within the barrel; a light source that emits light into the optical guide; and a lens arranged between the light source and the optical guide, wherein the optical guide includes a groove arranged on the edge of the surface facing at least one of the light source and the group of lenses.

[0049] The groove may be an open loop or a closed loop on the surface.

[0050] This may include a masking layer disposed in at least a portion of the groove.

[0051] The aforementioned surfaces may include a first to third surface facing the light source, and a fourth surface facing the lens group.

[0052] The groove can be located on the first to fourth surfaces.

[0053] The light source includes first to third light sources corresponding to the first to third surfaces, and each of the first to third light sources can correspond to the length ratio of the first to third surfaces facing each other.

[0054] The area of ​​the light source may be smaller than the area of ​​any one of the first to third surfaces.

[0055] The lens may include a first guide lens adjacent to the first surface; a second guide lens adjacent to the second surface; and a third guide lens adjacent to the third surface.

[0056] The first to third guide lenses may have positive or negative refractive power.

[0057] The first to third guide lenses may each have a bulge on the surface facing the adjacent first to third light sources.

[0058] An additional lens in contact with the aforementioned surface may be included.

[0059] The optical guide may include an attached lens positioned on the surface and smaller than the length or width of the surface.

[0060] The lens may be in contact with or separated from the surface.

[0061] The lens may be positioned on the groove and overlapped with the other lens.

[0062] The lens can be positioned on the surface inside the groove. [Effects of the Invention]

[0063] The embodiment embodies a projection device and electronic device including the same used in AR (Augmented Reality), in which stray light is eliminated because total internal reflection does not occur on the outer surface of the optical guide (e.g., a prism) through an optical guide having a masking layer.

[0064] Furthermore, this will enable the creation of project equipment and electronic devices with improved optical performance, such as reduced flare, through masking.

[0065] Furthermore, it is possible to realize project equipment and electronic devices in which the light source can be easily miniaturized.

[0066] Furthermore, the embodiment embodies a projection device and electronic device that are used in applications such as Augmented Reality (AR), in which a guide lens is added to the outer surface of the optical guide, thereby eliminating stray light because total internal reflection does not occur on the outer surface of the optical guide (e.g., a prism).

[0067] Furthermore, by adding a guide lens to the outer surface of the optical guide to further suppress total internal reflection, we can realize project equipment and electronic devices with improved optical performance, such as reduced flare.

[0068] Furthermore, the lens bonding process facilitates manufacturing and enables the creation of project equipment and electronic devices with improved optical performance, such as reduced flare.

[0069] The diverse and beneficial advantages and effects of the present invention are not limited to those described above and will become more readily apparent in the process of describing specific embodiments of the present invention. [Brief explanation of the drawing]

[0070] [Figure 1] This is a conceptual diagram showing an example of an AI device.

[0071] [Figure 2] This is a block diagram showing the configuration of an augmented reality electronic device according to an embodiment of the present invention.

[0072] [Figure 3] This is a perspective view of an augmented reality electronic device according to a first embodiment of the present invention.

[0073] [Figure 4] This is a conceptual diagram illustrating various display methods applicable to the display unit according to embodiments of the present invention.

[0074] [Figure 5] This is a conceptual diagram illustrating various display methods applicable to the display unit according to embodiments of the present invention. [Figure 6] This is a conceptual diagram illustrating various display methods applicable to the display unit according to embodiments of the present invention.

[0075] [Figure 7] This is a perspective view of a project apparatus according to one embodiment.

[0076] [Figure 8] This is an exploded perspective view of a project apparatus according to one embodiment.

[0077] [Figure 9] This is a diagram illustrating the coupling of a lens group, a first spacer, an optical guide, a lens, and a second spacer in a barrel in a project apparatus according to one embodiment.

[0078] [Figure 10] This is a drawing illustrating the coupling between the barrel, housing, and additional housing in a project apparatus according to one embodiment.

[0079] [Figure 11] This is a diagram illustrating the coupling between the housing and the light source unit in a project device according to one embodiment.

[0080] [Figure 12] Figure 7 shows a view of the section cut at AA'.

[0081] [Figure 13] This is a perspective view of the optical guide, bonding member, lens group, and a portion of the lens in the project apparatus according to the first embodiment.

[0082] [Figure 14] Figure 13 shows a view of the section cut at BB'.

[0083] [Figure 15a] Figure 13 shows a view from the first or fourth outer surface.

[0084] [Figure 15b] These are drawings illustrating various usage examples.

[0085] [Figure 16] Figure 13 shows a view from the second or third outer side.

[0086] [Figure 17] This is a cross-sectional view of the optical guide, bonding member, and lens group in the project apparatus according to the second embodiment.

[0087] [Figure 18] This is a diagram illustrating the effects of the project apparatus according to the embodiment.

[0088] [Figure 19] This is a perspective view of the optical guide, bonding member, lens group, and a portion of the lens in the project apparatus according to the third embodiment.

[0089] [Figure 20] This is a perspective view of the optical guide, bonding member, lens group, and a portion of the lens in the project apparatus according to the fourth embodiment.

[0090] [Figure 21] This is a perspective view of the optical guide, bonding member, lens group, and a portion of the lens in the project apparatus according to the fifth embodiment.

[0091] [Figure 22] This is a perspective view of the optical guide, bonding member, lens group, and a portion of the lens in the project apparatus according to the sixth embodiment.

[0092] [Figure 23] This is a perspective view of the optical guide, bonding member, lens group, and a portion of the lens in the project apparatus according to the 7th embodiment.

[0093] [Figure 24] This is a diagram illustrating the effects of the project apparatus according to the seventh embodiment. [Figure 25] This is a diagram illustrating the effects of the project apparatus according to the seventh embodiment. [Figure 26] This is a diagram illustrating the effects of the project apparatus according to the seventh embodiment.

[0094] [Figure 27] This is a cross-sectional view of the lens group, optical guide, lens, light source, and optical components in the project apparatus according to the 7th embodiment.

[0095] [Figure 28] This is a cross-sectional view of the lens group, optical guide, lens, light source, and optical components in the project apparatus according to the 8th embodiment.

[0096] [Figure 29] This is a cross-sectional view of the lens group, optical guide, lens, light source, and optical components in the project apparatus according to the ninth embodiment.

[0097] [Figure 30]This is a cross-sectional view of the lens group, optical guide, lens, light source, and optical components in the project apparatus according to the 10th embodiment.

[0098] [Figure 31] This is a cross-sectional view of the lens group, optical guide, lens, light source, and optical components in the project apparatus according to the 11th embodiment.

[0099] [Figure 32] This is a drawing illustrating various examples of lenses used in the project apparatus according to the embodiment.

[0100] [Figure 33] This is a perspective view of an optical guide, an example of a project apparatus according to the 12th embodiment.

[0101] [Figure 34] This is a perspective view of an optical guide in another example, in the project apparatus according to the 12th embodiment.

[0102] [Figure 35] Figure 34 is a cross-sectional view of an optical guide in one example of use, as seen after cutting along BB'.

[0103] [Figure 36] This is a cross-sectional view of an optical guide relating to another use example in the project apparatus according to the 12th embodiment.

[0104] [Figure 37] This is a perspective view of an optical guide relating to another use example in the project apparatus according to the 12th embodiment.

[0105] [Figure 38] This is a cross-sectional view of an optical guide to which a masking layer has been added to the project apparatus according to the 12th embodiment.

[0106] [Figure 39]This diagram illustrates the relationship between the optical guide and the light source in the project apparatus according to the 12th embodiment.

[0107] [Figure 40] This is a drawing of the project apparatus according to the 13th embodiment. [Modes for carrying out the invention]

[0108] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0109] However, the technical concept of the present invention is not limited to the embodiments described, but can be embodied in a variety of different forms, and within the scope of the technical concept of the present invention, one or more of its components can be selectively combined and substituted between embodiments.

[0110] Furthermore, unless explicitly defined and described, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a way that is generally understood by a person skilled in the art to which the present invention pertains, and commonly used terms, such as those defined in dictionaries, may be interpreted considering their meaning in the context of the relevant art.

[0111] Furthermore, the terminology used in the embodiments of the present invention is for illustrative purposes only and is not intended to limit the present invention.

[0112] In this specification, singular forms may also include plural forms unless otherwise specified in the text, and when it says "A and / or at least one of B and C," it may include one or more of all possible combinations of A, B, and C.

[0113] Furthermore, when describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used.

[0114] Such terminology is merely used to distinguish one component from another, and is not limited by the nature, order, or sequence of the component in question.

[0115] Furthermore, when it is stated that one component is “connected,” “joined,” or “connected” to another component, this may include not only cases where the component is directly connected, joined, or connected to the other component, but also cases where it is “connected,” “joined,” or “connected” by yet another component between that component and the other component.

[0116] Furthermore, when it is stated that something is formed or positioned "above or below" each component, "above or below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or positioned between the two components. Also, when expressed as "above or below," it can include not only the upward direction but also the downward direction relative to one component.

[0117] Figure 1 is a conceptual diagram showing an example of an AI device.

[0118] Referring to Figure 1, the AI ​​system consists of at least one of the following connected to a cloud network 10: an AI server 16, a robot 11, an autonomous vehicle 12, an XR device 13, a smartphone 14, or a home appliance 15. Here, the robot 11, autonomous vehicle 12, XR device 13, smartphone 14, or home appliance 15, etc., to which AI technology is applied, can be referred to as AI devices 11 to 15.

[0119] The cloud network 10 may refer to a network that constitutes part of the cloud computing infrastructure or exists within the cloud computing infrastructure. Here, the cloud network 10 may be configured using a 3G network, 4G or LTE (Long Term Evolution) network, or a 5G network, etc.

[0120] In other words, each device 11-16 constituting the AI ​​system can be connected through the cloud network 10. In particular, each device 11-16 may communicate with each other through a base station, or it may communicate with each other directly without going through a base station.

[0121] The AI ​​server 16 may include servers that perform AI processing and servers that perform calculations on big data.

[0122] The AI ​​server 16 is connected via a cloud network 10 to at least one of the AI ​​devices that make up the AI ​​system, namely the robot 11, autonomous vehicle 12, XR device 13, smartphone 14, or home appliance 15, and can assist at least part of the AI ​​processing of the connected AI devices 11-15.

[0123] At this time, the AI ​​server 16 can train an artificial neural network using a machine learning algorithm on behalf of the AI ​​devices 11-15, and can directly save the trained model or transmit it to the AI ​​devices 11-15.

[0124] At this time, the AI ​​server 16 receives input data from the AI ​​devices 11-15, uses a learning model to infer result values ​​from the received input data, and can generate responses and control commands based on the inferred result values ​​and transmit them to the AI ​​devices 11-15.

[0125] Alternatively, the AI ​​devices 11-15 may directly use a learning model to infer result values ​​from input data and generate responses or control commands based on the inferred result values.

[0126] <AI+ロボット> Robot 11 can be implemented using AI technology and can be realized as a guide robot, transport robot, cleaning robot, wearable robot, entertainment robot, pet robot, or unmanned aerial robot.

[0127] The robot 11 may include a robot control module for controlling its movements, and the robot control module may mean a software module or a chip that embodies it in hardware.

[0128] The robot 11 can use sensor information obtained from various types of sensors to acquire state information of the robot 11, detect (recognize) the surrounding environment and objects, generate map data, determine movement paths and travel plans, determine responses to user interactions, and determine actions.

[0129] Here, the robot 11 can utilize sensor information acquired by at least one of the following sensors—LiDAR, radar, and camera—to determine its movement path and travel plan.

[0130] The robot 11 can perform the aforementioned actions using a learning model composed of at least one artificial neural network. For example, the robot 11 can use the learning model to recognize its surrounding environment and objects, and can use the recognized surrounding environment information or object information to determine its actions. Here, the learning model may be learned directly by the robot 11 or learned by an external device such as an AI server 16.

[0131] At this time, the robot 11 may directly use a learning model to generate results and perform actions, or it may transmit sensor information to an external device such as an AI server 16, receive the results generated therefrom, and perform actions.

[0132] The robot 11 can determine a movement path and travel plan using at least one of the following: map data, object information detected from sensor information, or object information acquired from an external device. It can then control the drive unit to move the robot 11 along the determined movement path and travel plan.

[0133] 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. And the object identification information may include name, type, distance, position, etc.

[0134] Also, the robot 11 can perform operations or travel by controlling the drive unit based on the user's control / interaction. At this time, the robot 11 can obtain the intention information of the interaction by the user's actions or voice utterances, and determine a response based on the obtained intention information to perform an operation.

[0135] <AI + Autonomous Driving> The autonomous driving vehicle 12 can be embodied as a mobile robot, a vehicle, an unmanned aerial vehicle, etc. with AI technology applied.

[0136] The autonomous driving vehicle 12 can include an autonomous driving control module for controlling the autonomous driving function, and the autonomous driving control module can mean a software module or a chip embodied by this in hardware. The autonomous driving control module may be included inside as a component of the autonomous driving vehicle 12, or may be separately configured by separate hardware outside the autonomous driving vehicle 12 and connected.

[0137] The autonomous driving vehicle 12 can use the sensor information obtained from various types of sensors to obtain the state information of the autonomous driving vehicle 12, detect (recognize) the surrounding environment and objects, generate map data, determine a movement path and a travel plan, and determine an operation.

[0138] Here, in order to determine the movement path and the travel plan, the autonomous driving vehicle 12 can use the sensor information obtained by at least one or more sensors among a lidar, a radar, and a camera, similar to the robot 11.

[0139] In particular, the autonomous vehicle 12 can recognize the environment and objects in areas where its field of view is obstructed or beyond a certain distance by receiving sensor information from external devices, or it can receive information directly recognized from external devices.

[0140] The autonomous vehicle 12 can perform the aforementioned operations using a learning model composed of at least one artificial neural network. For example, the autonomous vehicle 12 can use the learning model to recognize the surrounding environment and objects, and can use the recognized surrounding environment information or object information to determine its driving path. Here, the learning model may be learned directly by the autonomous vehicle 12 or learned by an external device such as an AI server 16.

[0141] At this time, the autonomous vehicle 12 may directly use a learning model to generate results and perform its actions, or it may transmit sensor information to an external device such as an AI server 16, receive the results generated therefrom, and perform its actions.

[0142] The autonomous vehicle 12 can determine a travel path and travel plan using at least one of the following: map data, object information detected from sensor information, or object information acquired from an external device. The drive unit can then control the autonomous vehicle 12 to travel along the determined travel path and travel plan.

[0143] The map data may include object identification information for various objects placed in the space (e.g., roads) in which the autonomous vehicle 12 travels. For example, the map data may include object identification information for fixed objects such as streetlights, rocks, and buildings, as well as movable objects such as vehicles and pedestrians. The object identification information may include names, types, distances, and locations.

[0144] Furthermore, the autonomous vehicle 12 can perform actions and drive by controlling the drive unit based on the user's control / interaction. At this time, the autonomous vehicle 12 can acquire intent information from the user's actions and voice utterances, and can determine a response and perform an action based on the acquired intent information.

[0145] <AI+XR> XR device 13 can be implemented in an HMD (Head-Mount Display), HUD (Head-Up Display) equipped in a vehicle, TV, mobile phone, smartphone, computer, wearable device, home appliance, digital signage, vehicle, fixed robot, mobile robot, etc. by applying AI technology.

[0146] XR device 13 can obtain information about the surrounding space or real objects by analyzing 3D point cloud data or image data acquired through various sensors or from external devices to generate position data and attribute data for 3D points, and render and output an XR object that outputs the information. For example, XR device 13 can output an XR object including additional information for a recognized object corresponding to the recognized object.

[0147] XR device 13 can perform the above operations using a learning model composed of at least one artificial neural network. For example, XR device 13 can recognize real objects with 3D point cloud data or image data using a learning model and provide information corresponding to the recognized real objects. Here, the learning model can be directly learned in XR device 13 or learned in an external device such as AI server 16.

[0148] At this time, XR device 13 may generate a result using a direct learning model to perform operations, or may transmit sensor information to an external device such as AI server 16 and receive the result generated thereby to perform operations.

[0149] <AI+Robot+Autonomous Driving> Robot 11 can be implemented in a guiding robot, a transporting robot, a cleaning robot, a wearable robot, an entertainment robot, a pet robot, a drone, etc. by applying AI technology and autonomous driving technology.

[0150] The robot 11 to which AI technology and autonomous driving technology are applied can refer to the robot itself that has autonomous driving capabilities, or to a robot 11 that interacts with an autonomous vehicle 12, etc.

[0151] A robot 11 with autonomous driving capabilities can be described as a device that moves on its own along a given path or determines its own path without user control.

[0152] Robots 11 and autonomous vehicles 12 with autonomous driving capabilities can use a common sensing method to determine one or more of a travel route or travel plan. For example, robots 11 and autonomous vehicles 12 with autonomous driving capabilities can use information sensed through LiDAR, radar, and cameras to determine one or more of a travel route or travel plan.

[0153] The robot 11 interacting with the autonomous vehicle 12 exists separately from the autonomous vehicle 12, but can perform actions linked to the autonomous driving function inside or outside the autonomous vehicle 12, or actions linked to the user riding in the autonomous vehicle 12.

[0154] At this time, the robot 11 interacting with the autonomous vehicle 12 can control or assist the autonomous driving function of the autonomous vehicle 12 by acquiring sensor information on behalf of the autonomous vehicle 12 and providing it to the autonomous vehicle 12, or by acquiring sensor information and generating surrounding environment information or object information and providing it to the autonomous vehicle 12.

[0155] Alternatively, a robot 11 interacting with the autonomous vehicle 12 can monitor the user riding in the autonomous vehicle 12 or control the functions of the autonomous vehicle 12 through interaction with the user. For example, if the robot 11 determines that the driver is drowsy, it can activate the autonomous driving function of the autonomous vehicle 12 or assist in controlling the drive unit of the autonomous vehicle 12. Here, the functions of the autonomous vehicle 12 controlled by the robot 11 may include not only the autonomous driving function but also functions provided by the navigation system and audio system installed inside the autonomous vehicle 12.

[0156] Alternatively, a robot 11 interacting with the autonomous vehicle 12 can provide information to the autonomous vehicle 12 or assist its functions from outside the autonomous vehicle 12. For example, the robot 11 may provide traffic information, including signal information, to the autonomous vehicle 12, like a smart traffic light, or it may interact with the autonomous vehicle 12 and automatically connect an electric charger to the charging port, like an automatic electric charger for an electric vehicle.

[0157] <AI+ロボット+XR> Robot 11 can be implemented using AI and XR technologies and can be embodied as a guidance robot, transport robot, cleaning robot, wearable robot, entertainment robot, pet robot, unmanned aerial robot, drone, etc.

[0158] A robot 11 to which XR technology is applied may refer to a robot that is the target of control / interaction within the XR image. In this case, robot 11 is distinct from the XR device 13 and can be linked together.

[0159] When a robot 11, which is the target of control / interaction within the XR image, acquires sensor information from sensors including a camera, the robot 11 or the XR device 13 can generate an XR image based on the sensor information, and the XR device 13 can output the generated XR image. Such a robot 11 can then operate based on control signals input through the XR device 13 or user interaction.

[0160] For example, the user can view an XR video corresponding to the perspective of the robot 11 remotely linked through an external device such as the XR device 13, and can adjust the autonomous driving path of the robot 11 through interaction, control its movement or driving, and view information on surrounding objects.

[0161] <AI+Autonomous Driving+XR> The autonomous driving vehicle 12 can be embodied as a mobile robot, a vehicle, an unmanned aerial vehicle, etc. with AI technology and XR technology applied.

[0162] The autonomous driving vehicle 12 with XR technology applied can mean an autonomous driving vehicle equipped with means for providing an XR video, or an autonomous driving vehicle that is the object of control / interaction within the XR video. In particular, the autonomous driving vehicle 12 that is the object of control / interaction within the XR video is distinguished from the XR device 13 and can be interlinked with each other.

[0163] The autonomous driving vehicle 12 equipped with means for providing an XR video can obtain sensor information from sensors including a camera and output an XR video generated based on the obtained sensor information. For example, the autonomous driving vehicle 12 can provide an XR object corresponding to a real object or an object in the screen to the passenger by outputting an XR video with a HUD.

[0164] At this time, when the XR object is output to the HUD, at least a part of the XR object can be output so as to overlap with the actual object towards which the passenger's line of sight is directed. On the contrary, when the XR object is output to a display provided inside the autonomous driving vehicle 12, at least a part of the XR object can be output so as to overlap with the object in the screen. For example, the autonomous driving vehicle 12 can output an XR object corresponding to an object such as a road, other vehicles, traffic lights, traffic signs, motorcycles, pedestrians, buildings, etc.

[0165] When an autonomous vehicle 12, which is the target of control / interaction within the XR image, acquires sensor information from sensors including cameras, the autonomous vehicle 12 or the XR device 13 can generate an XR image based on the sensor information, and the XR device 13 can output the generated XR image. Such an autonomous vehicle 12 can then operate based on control signals input through external devices such as the XR device 13 or on user interaction.

[0166] [Augmented Reality Technology] Augmented reality (XR) is a general term encompassing virtual reality (VR), augmented reality (AR), and mixed reality (MR). VR technology provides real-world objects and backgrounds solely through computer graphics (CG), AR technology provides virtual CG images alongside real-world images, and MR technology is a computer graphics technology that blends and combines virtual objects with the real world.

[0167] MR technology is similar to AR technology in that it represents both real and virtual objects. However, while AR technology uses virtual objects to complement real objects, MR technology uses virtual and real objects with equal characteristics.

[0168] XR technology can be applied to HMDs (Head-Mount Displays), HUDs (Head-Up Displays), mobile phones, tablet PCs, laptops, desktops, TVs, digital signage, and other devices, and devices to which XR technology is applied can be called XR devices.

[0169] The following describes an electronic device that provides augmented reality according to an embodiment of the present invention. In particular, a projection device applied to augmented reality and an electronic device including the same will be described in detail.

[0170] Figure 2 is a block diagram showing the configuration of an augmented reality electronic device 20 according to an embodiment of the present invention.

[0171] Referring to Figure 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, etc. The components shown in Figure 2 are not essential for realizing the electronic device 20, and the electronic device 20 described herein may have more or fewer components than those listed above.

[0172] More specifically, the wireless communication unit 21 among the components may include one or more modules that enable wireless communication between the electronic device 20 and a wireless communication system, between the electronic device 20 and other electronic devices, 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.

[0173] Such a wireless communication unit 21 may include at least one of the following: a broadcast receiving module, a mobile communication module, a wireless internet module, a short-range communication module, and a location information module.

[0174] The input unit 22 may include a camera or video input unit for video signal input, a microphone or audio input unit for audio signal input, and a user input unit (e.g., touch key, mechanical key) for receiving information from the user. Audio data and image data collected by the input unit 22 may be analyzed and processed as user control commands.

[0175] The sensing unit 23 may include one or more sensors for sensing at least one of the following: information within the electronic device 20, information about the surrounding environment surrounding the electronic device 20, and user information.

[0176] For example, the sensing unit 23 may include at least one of the following: proximity sensor, illumination sensor, touch sensor, acceleration sensor, magnetic sensor, gravity sensor (G-sensor), gyroscope sensor, motion sensor, RGB sensor, infrared sensor (IR sensor), fingerprint recognition sensor, ultrasonic sensor, optical sensor (e.g., imaging means), microphone, battery gauge, environmental sensor (e.g., barometer, hygrometer, thermometer, radiation detection sensor, heat detection sensor, gas detection sensor, etc.), and chemical sensor (e.g., electronic nose, healthcare sensor, biorecognition sensor, etc.). On the other hand, the electronic device 20 disclosed herein can combine and utilize information sensed by at least two of these sensors.

[0177] The output unit 24 is for generating outputs related to vision, hearing, or touch, and may include at least one of a display unit, an acoustic output unit, a haptic module, or an optical output unit. The display unit can embody a touchscreen by forming an interlayer structure with or integrating it with a touch sensor. Such a touchscreen can function as a user input means that provides an input interface between the augmented reality electronic device 20 and the user, and can also provide an output interface between the augmented reality electronic device 20 and the user.

[0178] The interface unit 25 acts as a conduit to 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 external devices and perform mutual interaction by exchanging various input signals, sensing signals, and data.

[0179] For example, the interface unit 25 may include at least one of the following: 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, or an earphone port.

[0180] Furthermore, memory 26 stores data that supports the various functions of the electronic device 20. Memory 26 can store numerous application programs (or applications) driven by the electronic device 20, data for the operation of the electronic device 20, and instruction words. At least some of these application programs can be downloaded from an external server via wireless communication. Also, at least some of these application programs can be present on the electronic device 20 from the time of its release for the basic functions of the electronic device 20 (e.g., telephone incoming and outgoing functions, message receiving and outgoing functions).

[0181] In addition to operation related to the application, the control unit 27 typically controls the overall operation of the electronic device 20. The control unit 27 can process signals, data, information, etc., that are input or output through the aforementioned components.

[0182] Furthermore, the control unit 27 can control at least some of the components by driving the application program stored in the memory 26 to provide the user with appropriate information or process functions. In addition, the control unit 27 can operate at least two or more of the components included in the electronic device 20 in combination with each other in order to drive the application program.

[0183] Furthermore, the control unit 27 can sense the movements of the electronic device 20 or the user by utilizing the gyroscope sensor, gravity sensor, motion sensor, etc., included in the sensing unit 23. Alternatively, the control unit 27 may sense objects approaching the electronic device 20 or the user by utilizing the proximity sensor, illuminance sensor, magnetic sensor, infrared sensor, ultrasonic sensor, light sensor, etc., included in the sensing unit 23. In addition, the control unit 27 can also sense the user's movements through sensors provided in a controller that operates in conjunction with the electronic device 20.

[0184] Furthermore, the control unit 27 can perform the operation (or function) of the electronic device 20 using the application stored in the memory 26.

[0185] The power supply unit 28, under the control of the control unit 27, supplies power to each component included in the electronic device 20 by applying an external or internal power supply. The power supply unit 28 includes a battery, which may be built-in or replaceable.

[0186] At least some of the aforementioned components can cooperate with each other to embody the operation, control, or control method of an electronic device according to the various embodiments described below. Furthermore, the operation, control, or control method of an electronic device can be embodied on the electronic device by driving at least one application program stored in memory 26.

[0187] The following description of an electronic device described as an example of the present invention will be based on an embodiment applied to an HMD (Head Mounted Display). However, embodiments of the electronic device according to the present invention may include mobile phones, smartphones, laptop computers, digital broadcasting terminals, PDAs (personal digital assistants), PMPs (portable multimedia players), navigation systems, slate PCs, tablet PCs, ultrabooks, and wearable devices. Wearable devices may include not only HMDs but also smart watches, contact lenses, VR / AR / MR glasses, and the like.

[0188] Figure 3 is a perspective view of an augmented reality electronic device according to an embodiment of the present invention.

[0189] As shown in Figure 3, the electronic device according to an embodiment of the present invention may include a frame 100, a projector 200, and a display unit 300.

[0190] The electronic device may be provided in the form of glasses (smart glass). The glasses-type electronic device is configured to be wearable on the head of the human body and may include a frame (case, housing, etc.) 100 for this purpose. The frame 100 may be made of a flexible material to facilitate wearing.

[0191] The frame 100 is supported on the head and provides space for mounting various components. As shown in the diagram, electronic components such as a projector 200, a user input unit 130, or an audio output unit 140 may be mounted on the frame 100. In addition, a lens covering at least one of the left and right eyes may be detachably attached to the frame 100.

[0192] As shown in the drawing, the frame 100 may take the form of eyeglasses worn on the user's face, but is not necessarily limited to this, and may also take the form of goggles or other devices worn in close contact with the user's face.

[0193] Such a frame 100 may include a front frame 110 having at least one opening, and a pair of side frames 120 that extend in the y-direction (in Figure 3) intersecting the front frame 110 and are aligned with each other.

[0194] Frame 100 may have the same or different lengths DI in the x-direction and LI in the y-direction.

[0195] The projection device 200 is provided to control various electronic components installed in an electronic device. The projection device 200 may be used interchangeably with terms such as "optical output device," "optical projection device," "optical irradiation device," and "optical device."

[0196] The projection device 200 can generate an image visible to the user or a video of a series of images. The projection device 200 may include an image source panel that generates an image and multiple lenses that diffuse and focus the light generated by the image source panel.

[0197] The projecting device 200 can be fixed to either one of the two side frames 120. For example, the projecting device 200 can be fixed to the inside or outside of either side frame 120, or it can be built into the inside of either side frame 120 and formed as a single unit. Alternatively, the projecting device 200 may be fixed to the front frame 110 or provided separately from the electronic devices.

[0198] The display unit 300 can be implemented in the form of a head-mounted display (HMD). An HMD is a display system that is worn on the head and shows images directly in front of the user's eyes. When the user wears the electronic device, the display unit 300 can be positioned to correspond to at least one of the left and right eyes so that images can be provided directly in front of the user's eyes. In this drawing, an example is shown in which the display unit 300 is positioned in the part corresponding to the right eye so that images can be output toward the user's right eye. However, as mentioned above, it is not limited to this and may be positioned toward both the left and right eyes.

[0199] The display unit 300 allows the user to visually perceive the external environment while simultaneously displaying an image generated by the projector device 200 to the user. For example, the display unit 300 can project an image onto the display area using a prism.

[0200] Furthermore, the display unit 300 may be made of light-transmitting material so that the projected image and the general field of view in front (the range that the user sees through their eyes) can be seen simultaneously. For example, the display unit 300 may be semi-transparent and may be made of an optical material including glass.

[0201] The display unit 300 can be inserted into and fixed to an opening in the front frame 110, or it can be positioned behind the opening [i.e., between the opening and the user] and fixed to the front frame 110. The drawing shows an example where the display unit 300 is positioned behind the opening and fixed to the front frame 110, but the display unit 300 can be positioned and fixed in various other locations on the frame 100.

[0202] As shown in Figure 3, the electronic device allows the projection device 200 to direct image light onto one side of the display unit 300, causing the image light to be emitted through the display unit 300 to the other side, making the image generated by the projection device 200 visible to the user.

[0203] Consequently, the user can view the external environment through the opening of the frame 100 while simultaneously viewing the image generated by the project device 200. In other words, the image output through the display unit 300 can appear to overlap with the general field of view. Electronic devices can utilize these display characteristics to provide augmented reality (AR), which overlays a virtual image onto a real-world image or background to present it as a single image.

[0204] Furthermore, in addition to such driving mechanisms, the external environment and images generated by the projecting device 200 may be provided to the user with a time delay during short periods that are imperceptible to the human eye. For example, within a single frame, the external environment may be provided to the user in one section, and the video from the projecting device 200 may be provided to the user in other sections.

[0205] Alternatively, overlap and time difference may all be provided.

[0206] Figures 4 to 6 are conceptual diagrams illustrating various display methods applicable to the display unit according to embodiments of the present invention.

[0207] Specifically, Figure 4 is a diagram illustrating an example of a prism-type optical component, Figure 5 is a diagram illustrating an example of a waveguide-type optical component, and Figure 6 is a diagram illustrating an example of a surface reflection-type optical component.

[0208] As shown in Figure 4, a prism-type optical element can be used in the display unit 300-1 according to the embodiment of the present invention.

[0209] As an example, the prism-type optical element may be a flat-type glass optical element in which the surface to which the image light enters and the surface to which it exits 300a are planar, as shown in Figure 4(a), or a freeform glass optical element in which the surface to which the image light exits 300b is formed as a curved surface without a constant radius of curvature, as shown in Figure 4(b).

[0210] A flat-type glass optical element receives image light generated by the projection device 200 on its flat side surface, reflects it with an internally provided total reflection mirror 300a, and emits it towards the user. Here, the total reflection mirror 300a provided inside the flat-type glass optical element can be formed inside the flat-type glass optical element by a laser.

[0211] The freeform glass optical element is configured so that its thickness decreases as it moves away from the incident surface, allowing the image light generated by the projecting device 200 to be incident on its curved side surface, undergo total internal reflection, and be emitted towards the user.

[0212] As shown in Figure 5, a waveguide-type optical element or a light guide optical element (LOE) may be used in the display unit 300-2 according to another embodiment of the present invention.

[0213] Examples of such waveguide or light guide type optical components include a segmented beam splitter type glass optical component as shown in Figure 5(a), a sawtooth prism type glass optical component as shown in Figure 5(b), a glass optical component with a diffractive optical element (DOE) as shown in Figure 5(c), a glass optical component with a hologram optical element (HOE) as shown in Figure 5(d), a glass optical component with a passive grating as shown in Figure 5(e), and a glass optical component with an active grating as shown in Figure 5(f).

[0214] As shown in Figure 5(a), a segmented beam splitter glass optical element may be provided with a total reflection mirror 301a on the side where the light image is incident and a segmented beam splitter (301b) on the side where the light image is emitted, as illustrated.

[0215] Accordingly, the light image generated by the project device 200 is totally reflected by the totally reflected mirror 301a inside the glass optical element, and the totally reflected light image is guided along the longitudinal direction of the glass, partially separated and emitted by the partial reflected mirror 301b, so that it can be perceived by the user's vision.

[0216] As shown in Figure 5(b), the sawtooth prism type glass optical element allows the image light from the projector 200 to enter the side of the glass in an oblique direction, undergo total internal reflection within the glass, and then exit the glass via the sawtooth-shaped irregularities 302 on the exit side, making it perceptible to the user's vision.

[0217] A glass optical member having a diffractive optical element (DOE) as shown in Figure 5(c) may have a first diffracting portion 303a on the surface where the light image is incident and a second diffracting portion 303b on the surface where the light image is emitted. Such first and second diffracting portions 303a and 303b may be provided by patterning a specific pattern on the surface of the glass or by attaching a separate diffracting film.

[0218] Accordingly, the light image generated by the project device 200 enters through the first diffraction section 303a, is diffracted, undergoes total internal reflection, is guided along the longitudinal direction of the glass, and exits through the second diffraction section 303b, where it can be perceived by the user's vision.

[0219] A glass optical element having a hologram optical element (HOE), as shown in Figure 5(d), may be equipped with an out-coupler (304) inside the glass on the side from which the light image is emitted. Accordingly, a light image is incident from the projecting device 200 in an oblique direction through the side of the glass, undergoes total internal reflection, is guided along the longitudinal direction of the glass, and is emitted by the out-coupler 304 to be perceived by the user's vision. Such a hologram optical element can be subdivided into structures with a passive grating and structures with an active grating by slightly modifying the structure.

[0220] A glass optical member having a passive grating, as shown in Figure 5(e), may be provided with an in-coupler (305a) on the surface opposite to the glass surface on which the light image is incident, and an out-coupler (305b) on the surface opposite to the glass surface on which the light 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.

[0221] Accordingly, the light image incident on the glass surface on the side where the light enters is totally reflected by the in-coupler 305a on the opposite surface, guided along the longitudinal direction of the glass, and exited through the opposite surface of the glass by the out-coupler 305b, where it can be perceived by the user's vision.

[0222] A glass optical member having an active grating, as shown in Figure 5(f), may be provided with an in-coupler (306a) formed by the active grating inside the glass on the side where the light image is incident, and an out-coupler (306b) formed by the active grating inside the glass on the side where the light image is emitted.

[0223] Consequently, the light image incident on the glass is totally reflected by the in-coupler 306a, guided along the longitudinal direction of the glass, and emitted out of the glass by the out-coupler 306b, where it can be perceived by the user's vision.

[0224] In the modified display section, a pin mirror type optical element may be used.

[0225] Furthermore, in the freeform combiner type surface reflection optical element shown in Figure 6(a), a freeform combiner glass can be used, which is formed in a single glass with multiple flat surfaces having different angles of incidence of the light image, so that it has an overall curved surface in order to perform its role as a combiner. With such a freeform combiner glass 300, the angle of incidence of the light image can be different in different regions and emitted to the user.

[0226] As shown in Figure 6(b), a Flat HOE surface reflection optical element may be provided by coating or patterning a holographic optical element (HOE, 311) on the surface of a flat glass, and a light image incident from the projecting device 200 can pass through the holographic optical element 311, be reflected off the surface of the glass, and then pass through the holographic optical element 311 again to be emitted towards the user.

[0227] The freeform HOE surface reflection optical element, as shown in Figure 6(c), may be provided by coating or patterning a holographic optical element (HOE, 313) on the surface of a freeform glass, and the operating principle may be as described in Figure 6(b).

[0228] Figure 7 is a perspective view of the project apparatus according to one embodiment, and Figure 8 is an exploded perspective view of the project apparatus according to one embodiment.

[0229] Referring to Figures 7 and 8, the projection apparatus 200 according to one embodiment may include a lens group LS, a barrel 210, a housing 220, a light source unit 230, an optical guide LG, a lens FL, and an additional housing 240. The projection apparatus 200 may also include a first spacer SP1 and a second spacer SP2.

[0230] First, the lens group LS may also be called the outer lens. The lens group LS can be inserted into the barrel 210. That is, the barrel 210 is located inside the projecting apparatus 200 and can house the lens group LS. The barrel 210 can also house the optical guide LG, lens FL, first spacer PS1, and second spacer SP2.

[0231] Such a barrel 210 may have spaces for accommodating the aforementioned components or additional optical elements. For example, the barrel 210 may include a first groove and a second groove, as described later. The first groove may accommodate the lens group LS, and the second groove may accommodate the optical guide LG. Furthermore, the first groove and the second groove may be spaced apart in the barrel 210. That is, the barrel 210 has spaces (e.g., grooves) in which the lens group LS and the optical guide LG are arranged, and such spaces may be separated or spaced apart from each other. This may facilitate the insertion or coupling of the lens group and the optical guide.

[0232] In contrast, if the spaces are interconnected, the projecting equipment can be miniaturized.

[0233] The barrel 210 houses the lens group LS, and a first spacer SP1 can be positioned outside the lens group LS. The first spacer SP1 is positioned outside the lens group LS housed in the first groove of the barrel 210, preventing the lens group LS from coming loose.

[0234] The barrel 210 may include a plurality of holes connected to the second groove. These holes may be located on the side of the barrel 210. This allows light emitted from the light source 230 (described later) to enter the optical guide LG. Furthermore, the light that enters the optical guide LG may be reflected and passed through or transmitted to the lens group LS to be supplied to the waveguide or waveguide described above. For this purpose, the first groove and the second groove may be connected through through holes. That is, light reflected from the optical guide LG in the second groove may be supplied to the lens group LS in the first groove through the through holes. Also, as described above, light from the light source 230 may be emitted to the inner optical guide LG through a plurality of holes located on the side of the barrel 210.

[0235] The optical guide LG can be located within the barrel 210. The optical guide LG can be connected to the lens FL, which will be described later.

[0236] The optical guide LG may consist of at least one prism. For example, the optical guide LG may consist of a combination or joining of multiple prisms. The optical guide LG may include prisms. The prisms may include, for example, X-prisms as reflective members. In one embodiment, the optical guide LG may be a structure in which at least two or more prisms are combined. For example, the optical guide LG may be a structure in which four prisms are combined. Also, the optical guide LG may be a non-polarizing prism. That is, the optical guide LG does not have to perform polarization for light emitted from light sources 232a, 232b, and 232c.

[0237] Furthermore, the optical guide LG may 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 a second wavelength, and transmit light of a third wavelength. In other words, the coated surface can reflect light of a predetermined wavelength band. As a result, light of a desired wavelength band can be reflected by the optical guide LG from each of the multiple light sources 232a, 232b, and 232c. For example, light that has passed through the optical guide LG may be supplied to the lens group LS.

[0238] Lens FL can be connected to the optical guide LG. Lens FL can be positioned adjacent to the optical guide LG. For example, lens FL can be in contact with the optical guide. That is, lens FL can be in contact with the optical guide LG. Also, the optical guide LG can be in contact with lens FL.

[0239] The lens FL can then be coupled to the optical guide LG. In this case, the lens FL can be coupled to the optical guide LG through a bonding member or coupling member. The bonding member or coupling member can be positioned between the lens FL and the optical guide LG.

[0240] The lens FL is located on the outer surface of the optical guide LG and can be at least one. For example, the number of lens FLs can correspond to the number of light sources in the light source unit 230, which will be described later. If there are three light sources, there can also be three lens FLs.

[0241] For example, lens FL may include a first lens, a second lens, and a third lens corresponding to a light source. The first lens may correspond to a first light source. The second lens may correspond to a second light source. The third lens may correspond to a third light source. That is, each of the first to third lenses can receive light emitted from each of the first to third light sources.

[0242] The second spacer SP2 can be located inside the barrel 210. For example, the second spacer SP2 may be larger than the optical guide LG or the lens FL. The second spacer SP2 can be positioned outside the optical guide LG and the lens FL. This prevents the optical guide LG and the lens FL from separating from the barrel 210. In other words, the second spacer SP2 can prevent the optical guide LG and the lens FL from separating from the barrel 210.

[0243] The housing 220 can be located outside the barrel 210. The housing 220 can surround the barrel 210. For example, the housing 220 may be positioned to surround at least one area of ​​the barrel 210. Furthermore, the housing 220 may include space for housing a light source. The housing 220 may also include at least one housing hole. A light source may be placed within the housing hole. Light emitted from the light source may be supplied to the lens FL and the optical guide LG through at least one housing hole. The housing 220 may be located outside the barrel 210 and include space for housing the barrel 210 and the light source unit 230.

[0244] There may be at least one light source unit 230. As mentioned 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.

[0245] The first light source unit 230a may overlap with the lens group LS in the second direction (Y-axis direction). The second direction (Y-axis direction) can correspond to the direction of light emitted from the projector device 200. That is, the second direction (Y-axis direction) can correspond to the direction in which light emitted from the light source device or light source unit 230 is reflected by the optical guide LG and emitted to the aforementioned display unit.

[0246] The second light source unit 230b and the third light source unit 230c can be positioned facing each other. Alternatively, the second light source unit 230b and the third light source unit 230c can be positioned facing each other.

[0247] 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 both the first and second directions.

[0248] Furthermore, the first light source unit 230a can be located in the region between the second light source unit 230b and the third light source unit 230c. The directions of the light emitted from the second light source unit 230b and the third light source unit 230c can be opposite to each other.

[0249] Each light source unit may include a substrate 231a, 231b, 231c, light sources 232a, 232b, 232c, and optical members 233a, 233b, 233c.

[0250] Furthermore, the substrates 231a, 231b, 231c, the light sources 232a, 232b, 232c, and the optical members 233a, 233b, 233c can be positioned sequentially inward. That is, the optical members can be positioned adjacent to the substrates and the light source comparison light guide LG.

[0251] The substrates 231a, 231b, and 231c are connected to the light sources 232a, 232b, and 232c, and can transmit electrical energy so that the light sources 232a, 232b, and 232c emit light.

[0252] The substrates 231a, 231b, and 231c can be located on the outermost surface of the housing 220.

[0253] 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 with the optical guide LG in a second direction (Y-axis direction). The second substrate 231b and the third substrate 231c may overlap in a first direction (X-axis direction). The second substrate 231b and the third substrate 231c may be positioned facing each other in the housing 220. The first substrate 231a may be positioned in the region between the second substrate 231b and the third substrate 231c.

[0254] Light sources 232a, 232b, and 232c can emit light. For example, light emitted from light sources 232a, 232b, and 232c can be incident on an optical guide LG inside the housing 220. The optical guide LG can be located inside the housing 220.

[0255] Furthermore, there may be one or more light sources 232a, 232b, and 232c. Light sources 232a, 232b, and 232c may include a first light source 232a, a second light source 232b, and a third light source 232c. And light sources 232a, 232b, and 232c may be arranged on each substrate.

[0256] In other words, the light source unit 230 may have one or more light sources 232a, 232b, and 232c. For example, there may be multiple light sources 232a, 232b, and 232c, including a first light source 232a, a second light source 232b, and a third light source 232c. The first to third light sources 232a to 3rd light sources 232c may emit light in the same direction or in different directions from each other. For example, the second light source 232b and the third light source 232c may be positioned facing 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). An optical guide LG may be positioned between the second light source 232b and the third light source 232c. As a result, the optical guide LG may overlap with the second light source 232b and the third light source 232c.

[0257] The first to third light sources 232a to 232c can emit light toward the optical guide LG. Furthermore, the first light source 232a can overlap with the optical guide LG in a second direction. With this configuration, the projection device 200 can have a compact light source unit 230.

[0258] Furthermore, the first light source 232a, the second light source 232b, and the third light source 232c can each emit light of partially the same or different wavelengths or colors from each other. For example, the first light source 232a, the second light source 232b, and the third light source 232c can each emit red, green, and blue light, respectively.

[0259] The optical members 233a, 233b, and 233c can be at least one. The optical members 233a, 233b, and 233c can include a first optical member 233a, a second optical member 233b, and a third optical member 233c corresponding to a first light source 232a, a second light source 232b, and a third light source 232c, respectively. The first optical member 233a, the second optical member 233b, and the third optical member 233c can include filters. Furthermore, the first optical member 233a, the second optical member 233b, and the third optical member 233c can include glass. Such first optical members 233a, the second optical member 233b, and the third optical member 233c can filter light, or they can block foreign matter flowing into the light source early on, that is, they can protect the light source.

[0260] The additional housing 240 can be positioned outside the barrel 210 and enclose it. The barrel 210 is coupled to the housing 220 by various coupling methods, and the additional housing 240 can be coupled to the housing 220. The additional housing 240 can also be coupled to the barrel 210. Accordingly, the project apparatus 200 according to the embodiment can provide improved reliability.

[0261] Figure 9 is a diagram illustrating the coupling of the lens group, first spacer, optical guide, lens and second spacer in a barrel in a project apparatus according to one embodiment; Figure 10 is a diagram illustrating the coupling between the barrel, housing and additional housing in a project apparatus according to one embodiment; and Figure 11 is a diagram illustrating the coupling between the housing and light source unit in a project apparatus according to one embodiment.

[0262] Referring to Figures 9 to 11, in the project apparatus according to the embodiment, the barrel 210 may include a first groove 210h1 and a 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 sequentially along the second direction (Y-axis direction).

[0263] A lens group can be arranged in the first groove 210h1. And an optical guide can be arranged in the second groove 210h2.

[0264] And the first groove 210h1 and the second groove 210h2 can be arranged at a distance in the second direction (Y-axis direction). Also, as described above, the first groove 210h1 and the second groove 210h2 can be connected through a through hole. Thereby, the light reflected by the optical guide in the second groove 210h2 can be provided to the lens group in the first groove 210h1 and finally emitted to the display unit.

[0265] The lens group LS can be inserted into the first groove 210h1 of the barrel 210. And the first spacer SP1 can be positioned outside the lens group LS in the first groove 210h1 by the barrel 210. The first spacer SP1 contacts the lens group LS and can suppress the detachment of the lens group LS as described above.

[0266] And the optical guide LG and the lenses FL1, FL2, FL3 connected to the optical guide LG can be inserted into the second groove 210h2. The optical guide LG and the lenses FL1, FL2, FL3 connected to the optical guide LG can be positioned within the second groove 210h2. And the second spacer SP2 can be positioned outside the optical guide LG and the lenses FL1, FL2, FL3 connected to the optical guide LG. The second spacer SP2 can contact the optical guide LG or a lens (particularly, the first guide lens FL1). Thereby, the detachment of the optical guide LG and the lenses FL1, FL2, FL3 connected to the optical guide LG can be suppressed. The lenses FL1, FL2, FL3 can be expressed as guide lenses. For example, the lens can include the first guide lens FL1, the second guide lens FL2, and the third guide lens FL3.

[0267] In this embodiment, as described above, the optical waveguide LG can be separated from or in contact with the guide lenses FL1 to FL3. At this time, the guide lenses FL1 to LF3 are arranged on the outer surface of the optical waveguide LG and may be smaller than the length or width of the outer surface. Further, the guide lens can further include a fourth guide lens (FL4, see FIG. 23). Thereby, the lenses FL1, FL2, FL3, and FL4 can include at least one guide lens. Also, the lens can be a guide lens. For example, the lens can include a first guide lens FL1, a second guide lens FL2, a third guide lens FL3, and a fourth guide lens FL4. The lenses FL1, FL2, FL3, and FL4 can be arranged between the light source unit and the optical waveguide LG or between the lens group LS and the optical waveguide LG. And the lenses FL1, FL2, FL3, and FL4 can be coupled to the optical waveguide LG. At least one lens can be arranged on at least one of the first to fourth outer surfaces of the optical waveguide LG.

[0268] In this embodiment, as described above, the optical waveguide LG can be separated from or in contact with the guide lenses FL1 to FL4. At this time, the guide lenses FL1 to FL4 are arranged on the outer surface of the optical waveguide LG and may be smaller than the length or width of the outer surface.

[0269] The first spacer SP1 and the second spacer SP2 can be sequentially arranged along the second direction (Y-axis direction). The first spacer SP1 and the second spacer SP2 can overlap along the second direction (Y-axis direction). And between the first spacer SP1 and the second spacer SP2, the lens group LS, the optical waveguide LG, and the first guide lens FL1 can be located. Thereby, the first spacer SP1 and the second spacer SP2 can overlap with the lens group LS, the optical waveguide LG, and the first guide lens FL1 in the second direction (Y-axis direction).

[0270] The barrel 210 can then be inserted into the housing 220. That is, the barrel 210 can be positioned in the housing hole of the housing 220. Furthermore, the housing 220 and the barrel 210 can be connected in various ways. For example, a projection on the housing 220 and a connecting hole on the barrel 210 can be connected to each other. In addition, the housing 220 can be positioned below the barrel 210, and an additional housing 240 can be positioned above the barrel 210. Through the additional housing 240, the barrel 210 can maintain an improved connection with the housing 220.

[0271] After the barrel 210 is housed in the housing 220, multiple light sources can be inserted into the side of the housing 220. For example, a first light source 230a, a second light source 230b, and a third light source 230c can be located on the side of the housing 220.

[0272] Figure 12 is a view of Figure 7 cut at AA', Figure 13 is a perspective view of the projecting apparatus according to the first embodiment, showing the optical guide, bonding member, lens group, and part of the lens, and Figure 14 is a view of Figure 13 cut at BB'.

[0273] Referring to Figures 12 to 14, as described above, the projection apparatus according to the embodiment may include the aforementioned light source units 230a, 230b, 230c (or light sources), the optical guide LG, and a portion of the lens group LS, or masking layers ML1, ML2, ML3, ML4 placed between the lens and the optical guide LG. For example, masking layers ML1 to ML6 may be placed between the optical guide LG and the lens group LS, or between the optical guide LG and the lens FL. The masking layers may be located on the outer surface of the optical guide LG. Alternatively, masking layers ML1, ML2, ML3, ML4 may be placed on the edges of the outer surfaces facing the light source units 230a, 230b, 230c (or light sources). The masking layers ML1, ML2, ML3, ML4 according to the embodiment may have various structures such as square, circular, or with curved edges. The thickness of the masking layers may be 100 μm or less. Furthermore, the masking layer can be formed in various ways using opaque materials such as silk printing, black lacquer (containing black pigment), or sheets (Soma sheets). The masking layer can also be made from materials with low transmittance. This can reduce or minimize unintended total internal reflection, reduce or prevent flare and ghosting, and provide effects such as reduced optical aberrations.

[0274] As an example, the masking layer may include a first masking layer ML1 to a sixth masking layer ML6. The masking layer may be located on at least one of the first outer surfaces SF1 to the sixth outer surface SF6. Preferably, the masking layer may be located on at least one of the first outer surfaces SF1 to the fourth outer surface SF4.

[0275] As an example, the masking layer may include first masking layer ML1 to fourth masking layer ML4, which are positioned on the first outer surface SF1 to the fourth outer surface SF4, respectively. The first masking layer ML1 to fourth masking layer ML4 may be in contact with the outer surface (first outer surface to fourth outer surface) of the lens FL or the optical guide LG. The first masking layer ML1 to third masking layer ML3 may be positioned between the optical guide LG and the lens FL. The fourth masking layer ML4 may be positioned between the optical guide LG and the lens group LS. The fifth masking layer ML5 and the sixth masking layer ML6 may be positioned on the fifth and sixth outer surfaces of the optical guide, which are outer surfaces other than the first to fourth outer surfaces.

[0276] The projector device may achieve flare reduction by having a masking layer positioned on the edge of the outer surface of the optical guide LG facing at least one of the light sources.

[0277] For example, the outer surface of the optical guide LG may include a first outer surface SF1 to a third outer surface SF3 facing each of the light sources 232a, 232b, and 232c. The first outer surface SF1 may face the first light source 232a or the first light source unit 230a. The second outer surface SF2 may face the second light source 232b or the second light source unit 230b. The third outer surface SF3 may face the third light source 232c or the third light source unit 230c. Alternatively, the first light source 232a or the first light source unit may correspond to the first outer surface SF1. The second light source 232b or the second light source unit may correspond to the second outer surface SF2. The third light source 232c or the third light source unit may correspond to the third outer surface SF3.

[0278] Furthermore, the outer surface may include a fourth outer surface SF4. The fourth outer surface SF4 may be the outer surface facing the lens group LS in the optical guide LG. And the fourth outer surface SF4 can correspond to the lens group LS.

[0279] Furthermore, the outer surface may include the fifth outer surface SF5 and the sixth outer surface SF6. The fifth outer surface SF5 and the sixth outer surface SF6 may be outer surfaces of the optical guide LG other than the first outer surface SF1 to the fourth outer surface SF4.

[0280] As mentioned above, the masking layer can be located on the edge of the outer surface of the optical guide LG. Furthermore, a masking layer can be formed or located on the edge of each outer surface. In an example, the aforementioned masking layer may include a first masking layer ML1, a second masking layer ML2, a third masking layer ML3, and a fourth masking layer ML4. Furthermore, the masking layer may include a fifth masking layer ML5 and a sixth masking layer ML6.

[0281] A first masking layer ML1 may be located or formed on the first outer surface SF1. A second masking layer ML2 may be located or formed on the second outer surface SF2. A third masking layer ML3 may be located or formed on the third outer surface SF3. A fourth masking layer ML4 may be located or formed on the fourth outer surface SF4. A fifth masking layer ML5 may be located or formed on the fifth outer surface SF5. A sixth masking layer ML6 may be located or formed on the sixth outer surface SF6.

[0282] As an example, the first masking layer ML1 to the fourth masking layer ML4 may be arranged along the edge of the outer surface on each outer surface. For example, the first masking layer ML1 to the fourth masking layer ML4 may have an opening region. The opening region may be located in the center of the first masking layer ML1 to the fourth masking layer ML4. The fifth masking layer ML5 and the sixth masking layer ML6 may be positioned on the front of the fifth outer surface SF5 and the sixth outer surface SF6. As a modification, the fifth masking layer ML5 and the sixth masking layer ML6 may be partially positioned on the fifth outer surface SF5 and the sixth outer surface SF6.

[0283] Furthermore, the projecting apparatus may include bonding members BM1 to BM4 positioned between the optical guide LG and the lens or lens group. That is, bonding members BM1 to BM4 may be positioned between the optical guide LG and the lens FL or between the optical guide LG and the lens group LS. This allows bonding members BM1 to BM4 to bond the optical guide LG, the masking layer, and the lens group (or lens) to each other. The bonding members may include a first bonding member BM1, a second bonding member BM2, a third bonding member BM3, and a fourth bonding member BM4. The masking layer and bonding members may have outer surfaces corresponding to the scattering or roughness of each outer surface. For example, the masking layer may be formed according to the scattering or roughness of each outer surface.

[0284] The first connecting member BM1 can be positioned between the first outer surface SF1 and the first guide lens FL1. The second connecting member BM2 can be positioned between the second outer surface SF2 and the second guide lens FL2. The third connecting member BM3 can be positioned between the third outer surface SF3 and the third guide lens FL3. The fourth connecting member BM4 can be positioned between the fourth outer surface SF4 and the fourth guide lens FL4.

[0285] For example, the optical guide LG may include a first bonding member BM1 having a structure that protrudes inward from the first masking layer ML1 toward the first light source (or first light source) on the first outer surface SF1 by the first masking layer ML1. That is, the projection device according to the embodiment may include a projection located on the outer surface toward the inside of the masking layer.

[0286] Similarly, the second masking layer ML2 may have a structure located on the second outer surface SF2 and protruding toward the second light source (or second light source). The third masking layer ML3 may have a structure located on the third outer surface SF3 and protruding toward the third light source (or third light source). The fourth masking layer ML4 may have a structure located on the fourth outer surface SF4 and protruding toward the lens group.

[0287] Furthermore, the aforementioned first guide lens FL1 can be positioned between the first outer surface SF1 and the first light source unit 230a. The second guide lens FL2 can be positioned between the second outer surface SF2 and the second light source unit 230b. The third guide lens FL3 can be positioned between the third outer surface SF3 and the third light source unit 230c.

[0288] Alternatively, the first guide lens FL1 can be positioned adjacent to the first outer surface SF1. The second guide lens FL2 can be positioned adjacent to the second outer surface SF2. The third guide lens FL3 can be positioned adjacent to the third outer surface SF3.

[0289] As an example, each lens or guide lens can be in contact with or spaced apart from each outer surface. For example, the first guide lens FL1 can be in contact with or spaced apart from the first outer surface SF1. The second guide lens FL2 can be in contact with or spaced apart from the second outer surface SF2. The third guide lens FL3 can be in contact with or spaced apart from the third outer surface SF3.

[0290] For example, each of the masking layers ML1 to ML4 can have a structure that bulges inwardly of the optical guide LG or bulges toward an adjacent light source.

[0291] Then, in the projection apparatus, total reflection generated by the light emitted to the edge of each outer surface can be suppressed by the masking layer. Therefore, a projection apparatus with flare phenomenon prevented or reduced can be provided.

[0292] The mask layer can include, for example, all of black paint, members for corrosion treatment, and the like. Thereby, the total reflection phenomenon that causes the aforementioned flare phenomenon can be more effectively suppressed.

[0293] Furthermore, lenses or guide lenses can be placed on a masking layer and overlap with each lens. For example, a first guide lens FL1 can be placed on a first masking layer ML1. The first guide lens FL1 can overlap with the first masking layer ML1 in a second direction (Y-axis direction). This configuration makes it possible to maximize the effective area of ​​light while reducing the path of total internal reflection occurring on each outer surface, etc.

[0294] Similarly, the second guide lens FL2 may be positioned on the second masking layer ML2. The second guide lens FL2 may overlap the second masking layer ML2 in the first direction (X-axis direction).

[0295] Furthermore, the third guide lens FL3 may be positioned on the third masking layer ML3. The third guide lens FL3 may overlap the third masking layer ML3 in the first direction (X-axis direction).

[0296] The fourth guide lens FL4 can correspond to the lens (ln, Figure 8) in the lens group LS that is closest to the light source or optical guide LG. The following explanation will use this as a reference. The fourth guide lens FL4 may be placed on the fourth masking layer ML4. The fourth guide lens FL4 may overlap the fourth masking layer ML4 in the second direction (Y-axis direction). Also, the fourth guide lens FL4 may be larger than the first to third guide lenses.

[0297] Furthermore, the first masking layer ML1 can be positioned opposite the fourth masking layer ML4. The first masking layer ML1 and the fourth masking layer ML4 can overlap at least partially in the second direction (Y-axis direction).

[0298] Furthermore, the second masking layer ML2 can be positioned opposite the third masking layer ML3. The second masking layer ML2 and the fourth masking layer ML4 can overlap at least partially in the second direction (Y-axis direction).

[0299] In this example, each lens or guide lens may have a positive or negative refractive power. For example, the first guide lens FL1 to the third guide lens FL3 may have a positive or negative refractive power.

[0300] Furthermore, in the project apparatus according to the embodiment, each masking layer can have an open-loop or closed-loop structure on its outer surface. As shown in the figure, the masking layer can have an open-loop structure on its outer surface.

[0301] Figure 15a is a view of Figure 13 from the first or fourth outer side, Figure 15b is a drawing of various use cases, and Figure 16 is a view of Figure 13 from the second or third outer side.

[0302] Referring to Figures 15 and 16, in the project apparatus according to the embodiment, the masking layers may have different lengths for their long and short sides. For example, the first masking layer ML1 to the fourth masking layer ML4 may have different lengths for their long and short sides. Opposite long sides may have the same thickness. Also, opposite short sides may have the same thickness.

[0303] As an example, the thickness (a) of the region in contact with an adjacent masking layer (one of the first to fourth masking layers) of any one of the first to fourth masking layers ML1 may be greater than the thickness (b) of the region in contact with the remaining masking layers (fifth to sixth masking layers). With such a configuration, a number of masking layers can be arranged corresponding to regions adjacent to the path of light, further improving the effect of reducing or preventing flare.

[0304] Furthermore, the first masking layer ML1 to the fourth masking layer ML4 may have a relatively larger thickness along the corners where the first outer surface SF1 to the fourth outer surface SF4 meet, compared to other parts. For example, the first masking layer ML1 to the fourth masking layer ML4 may have a larger thickness along the first outer surface SF1 to the fourth outer surface SF4 compared to the fifth outer surface SF5 and the sixth outer surface SF6.

[0305] As an example, the first masking layer ML1 to the fourth masking layer ML4 may have aperture regions OP1 and OP2. The aperture regions OP1 and OP2 may correspond to the size of facing or corresponding light sources. As an example, the aperture regions OP1 and OP2 may correspond to the effective diameter of the mask layer. The ratio of the long side to the short side of the aperture regions OP1 and OP2 of the mask layer may be the same as or similar to the ratio of the long side to the short side of the light source. Here, similarity means within a range of 20%.

[0306] Furthermore, the aperture regions OP1 and OP2 may be larger than the corresponding light source emission surfaces. This configuration can reduce optical loss. Also, the shapes of the aperture regions on the first outer surface SF1 to the third outer surface SF3 may be identical. And the sizes of the aperture regions on the first outer surface SF1 to the third outer surface SF3 may be identical. This configuration allows for easy control of optical performance.

[0307] Furthermore, in the project apparatus according to the embodiment, the masking layer can have an open-loop structure on its outer surface. The first masking layer ML1 can have an open-loop structure on the first outer surface SF1 on a plane (XZ). The second masking layer ML2 can have an open-loop structure on the second outer surface SF2 on a plane (YZ). The third masking layer ML3 can have an open-loop structure on the third outer surface SF3 on a plane (YZ). The fourth masking layer ML4 can have an open-loop structure on the fourth outer surface SF4 on a plane (XZ).

[0308] A closer examination of Figure 15b reveals that the first masking layer ML1 to the fourth masking layer ML4 can each contain a first area, a third area located opposite the first area, a second area located between the first and third areas, and a fourth area located between the first and third areas and opposite the second area.

[0309] The thicknesses (a or b) of the first area to the fourth area can differ from each other in the first masking layer ML1 to the fourth masking layer ML4.

[0310] For example, the thickness of the first area to the fourth area may differ depending on the shape of the opening region of the first masking layer ML1 to the fourth masking layer ML4.

[0311] Furthermore, each masking layer can have only the third and fourth regions without the first and second regions. Conversely, each masking layer can have only the first and second regions without the third and fourth regions.

[0312] Furthermore, the thickness of the first to fourth areas may increase towards the corners if the opening is circular.

[0313] Furthermore, the thickness of the first to fourth areas may have curvature even when there are no opposing areas, and may increase towards the edges of the corners.

[0314] Figure 17 is a cross-sectional view of the optical guide, bonding member, and lens group in the project apparatus according to the second embodiment.

[0315] Referring to Figure 17, the description of each component in the project apparatus according to the second embodiment can be the same as described above, except for the content to be described later.

[0316] As an example, at least one masking layer ML1 to ML4 may bulge toward adjacent lenses FL1, FL2, FL3, and FL4. For example, a portion of the bonding member may be located in the opening region of the masking layer.

[0317] For example, the second masking layer ML2 can be positioned on the second bonding member BM2. This allows the optical guide LG, the second bonding member BM2, the second masking layer ML2, and the second guide lens FL2 to be positioned sequentially.

[0318] Furthermore, the third masking layer ML3 can be positioned on the third bonding member BM3. This allows the optical guide LG, the third bonding member BM3, the third masking layer ML3, and the third guide lens FL3 to be positioned sequentially.

[0319] Figure 18 is a diagram illustrating the effects of the project apparatus according to the embodiment.

[0320] Referring to Figure 18, in projecting devices of various embodiments according to the present invention, light emitted from a light source can be incident on the first outer surface SF1 to the third outer surface SF3. The light incident through the first outer surface SF1 to the third outer surface SF3 can then be emitted from the fourth outer surface SF4 and directed toward the lens group (or fourth guide lens).

[0321] Furthermore, the effective diameter (opening area) on the fourth outer surface SF4 may be even larger than the effective diameter (opening area) on the first outer surface SF1 to the third outer surface SF3.

[0322] Furthermore, light can be blocked by the fifth masking layer ML5 located on the fifth outer surface SF5 and the sixth masking layer ML6 located on the sixth outer surface SF6. This can prevent or reduce flare and ghosting phenomena.

[0323] Figure 19 is a perspective view of the optical guide, bonding member, lens group, and a portion of the lens in a project apparatus according to the third embodiment.

[0324] In the project apparatus relating to the embodiment, the descriptions of each component can be applied in the same manner as described above, except for the content described later.

[0325] Referring to Figure 19, the fifth masking layer ML5 and the sixth masking layer ML6 can be located on the fifth outer surface SF5 and the sixth masking layer ML6, respectively.

[0326] The optical guide LG can have aperture regions in its masking layer on outer surfaces other than those facing the lens and lens group. For example, at least one of the fifth masking layer ML5 and the sixth masking layer ML6 can have an aperture region. Such a configuration can further improve optical performance. For example, optical performance such as flare reduction can be improved.

[0327] Figure 20 is a perspective view of the optical guide, bonding member, lens group, and a portion of the lens in the project apparatus according to the fourth embodiment.

[0328] In the project apparatus relating to the embodiment, the descriptions of each component can be applied in the same manner as described above, except for the content described later.

[0329] Referring to Figure 20, a masking layer can be located on at least one of the outer surfaces of the optical guide LG according to this embodiment. For example, a portion of the first masking layer ML1 to the fourth masking layer ML4 can be located on the outer surface of the optical guide LG.

[0330] For example, the first masking layer ML1 does not have to be located on the first outer surface SF1. The second masking layer ML2 does not have to be located on the second outer surface SF2. The third masking layer ML3 does not have to be located on the third outer surface SF3. The fourth masking layer ML4 can be located on the fourth outer surface SF4.

[0331] This allows for the effective reduction of flare and ghosting phenomena by placing the fourth masking layer ML4 on the exit surface (corresponding to the fourth outer surface) where light incident on the optical guide LG through the first to third outer surfaces exits.

[0332] Figure 21 is a perspective view of the optical guide, bonding member, lens group, and a portion of the lens in the project apparatus according to the fifth embodiment.

[0333] In the project apparatus relating to the embodiment, the descriptions of each component can be applied in the same manner as described above, except for the content described later.

[0334] A masking layer can be located on at least one of the outer surfaces of the optical guide LG according to this embodiment. For example, a portion of the first masking layer ML1 to the fourth masking layer ML4 can be located on the outer surface of the optical guide LG.

[0335] For example, at least one of the first masking layer ML1 to the third masking layer ML3 can be located on at least one of the first outer surface SF1 to the third outer surface SF3.

[0336] The first masking layer ML1 does not necessarily have to be located on the first outer surface SF1. The second masking layer ML2 can be located on the second outer surface SF2. The third masking layer ML3 can be located on the third outer surface SF3. The fourth masking layer ML4 can be located on the fourth outer surface SF4. Such a configuration can improve optical performance, such as reducing flare.

[0337] Figure 22 is a perspective view of the optical guide, bonding member, lens group, and a portion of the lens in the project apparatus according to the sixth embodiment.

[0338] In the project apparatus relating to the embodiment, the descriptions of each component can be applied in the same manner as described above, except for the content described later.

[0339] A masking layer can be located on at least one of the outer surfaces of the optical guide LG according to this embodiment. For example, a portion of the first masking layer ML1 to the fourth masking layer ML4 can be located on the outer surface of the optical guide LG.

[0340] For example, at least one of the first masking layer ML1 to the third masking layer ML3 can be located on at least one of the first outer surface SF1 to the third outer surface SF3.

[0341] The first masking layer ML1 may be located on the first outer surface SF1. The second masking layer ML2 may be located on the second outer surface SF2. The third masking layer ML3 may be located on the third outer surface SF3. The fourth masking layer ML4 does not necessarily have to be located on the fourth outer surface SF4.

[0342] Such a configuration can improve optical performance, such as reducing flare.

[0343] Figure 23 is a perspective view of the projection apparatus according to the seventh embodiment, showing the optical guide, bonding member, lens group, and a part of the lens; Figures 24 to 26 are diagrams illustrating the effects of the projection apparatus according to the seventh embodiment; and Figure 27 is a cross-sectional view of the projection apparatus according to the seventh embodiment, showing the lens group, optical guide, lens, light source, and optical components.

[0344] Referring to Figures 12 and 23, as described above, the project apparatus according to the embodiment may include the aforementioned light source units 230a, 230b, 230c (or light sources), optical guide LG, lens FL positioned between the lens group LS and the optical guide LG or between the light source unit and the optical guide LG, and bonding members BM1 to BM4 positioned between the optical guide LG and the lens or lens group.

[0345] As an example, the projector can provide flare reduction by suppressing total internal reflection by having a lens or guide lens coupled to the outer surface of an optical guide LG facing at least one of the light sources.

[0346] Furthermore, in the embodiment, lenses FL1 to FL4 may be made of the same material as the optical guide LG. Also, lenses FL1 to FL4 may be made of materials having a refractive index ratio that will be described later compared to that of the optical guide LG. For example, lenses FL1 to FL4 may include a part of the material of the optical guide LG.

[0347] The ratio of the refractive index of lenses FL1 to FL4 to the refractive index of the optical guide LG may be 1:0.9 to 1:1.1. More preferably, the ratio of the refractive index of lenses FL1 to FL4 to the refractive index of the optical guide LG may be 1:0.98 to 1:1.02. With this configuration, total internal reflection of light is suppressed on the outer surfaces of the lenses and the optical guide LG adjacent to the lenses, and the degree of refraction can also be reduced. In other words, unwanted light from the light source can not be totally reflected on each outer surface of the optical guide LG through which the light generated from the light source passes and projected or exited into the waveguide through the lens group LS.

[0348] For example, in the optical guide LG, the first outer surface SF1 to the fourth outer surface SF4 can all be surfaces along the path of light. As a result, when blocking light rays through mechanisms or surface treatments to block total internal reflection, there is a problem in that the light for actual projection or emission is blocked.

[0349] In the project apparatus according to the embodiment, total internal reflection can be prevented on the first outer surface SF1 to the fourth outer surface SF4 of the optical guide LG by arranging lenses or guide lenses FL1 to FL4 on the first outer surface SF1 to the fourth outer surface SF4. In other words, if total internal reflection occurs on the first outer surface SF1 to the fourth outer surface SF4, the light reflected into the optical guide LG may be emitted as unwanted light or into the waveguide. In this embodiment, total internal reflection can occur on one side (the surface in contact with air or the outside) through the guide lenses FL1 to FL4 instead of the first outer surface SF1 to the fourth outer surface SF4. As a result, at least a portion of the totally reflected light can not enter the inside of the optical guide LG. This makes it possible to suppress flare or emission of unwanted light due to total internal reflection.

[0350] For example, the outer surface of the optical guide LG may include a first outer surface SF1 to a third outer surface SF3 facing each of the light sources 232a, 232b, and 232c. The first outer surface SF1 may face the first light source 232a or the first light source unit 230a. The second outer surface SF2 may face the second light source 232b or the second light source unit 230b. The third outer surface SF3 may face the third light source 232c or the third light source unit 230c. Alternatively, the first light source 232a or the first light source unit may correspond to the first outer surface SF1. The second light source 232b or the second light source unit may correspond to the second outer surface SF2. The third light source 232c or the third light source unit may correspond to the third outer surface SF3.

[0351] Furthermore, the outer surface may include a fourth outer surface SF4. The fourth outer surface SF4 may be the outer surface facing the lens group LS in the optical guide LG. And the fourth outer surface SF4 can correspond to the lens group LS.

[0352] The first outer surface SF1 and the fourth outer surface SF4 may be opposing surfaces. For example, in the optical guide LG, the first outer surface SF1 and the fourth outer surface SF4 may be positioned corresponding to each other. In the optical guide LG, the first outer surface SF1 and the fourth outer surface SF4 may overlap in the second direction (Y-axis direction). In the optical guide LG, the first outer surface SF1 and the fourth outer surface SF4 may be surfaces facing each other.

[0353] The second outer surface SF2 and the third outer surface SF3 may be opposing surfaces. For example, in the optical guide LG, the second outer surface SF2 and the third outer surface SF3 may be positioned corresponding to each other. In the optical guide LG, the second outer surface SF2 and the third outer surface SF3 may overlap in the first direction (X-axis direction). In the optical guide LG, the second outer surface SF2 and the third outer surface SF3 may be surfaces facing each other.

[0354] Furthermore, the outer surface may include the fifth outer surface SF5 and the sixth outer surface SF6. The fifth outer surface SF5 and the sixth outer surface SF6 may be outer surfaces of the optical guide LG other than the first outer surface SF1 to the fourth outer surface SF4.

[0355] Furthermore, the projecting device may include bonding members BM1 to BM4 that are positioned between the optical guide LG and lenses FL1 to FL4. This allows the bonding members BM1 to BM4 to be in contact with the optical guide LG and lenses FL1 to FL4.

[0356] The joining members may include a first joining member BM1, a second joining member BM2, a third joining member BM3, and a fourth joining member BM4. The joining members may have outer surfaces corresponding to the scattering or roughness of each outer surface.

[0357] The first connecting member BM1 can be positioned between the first outer surface SF1 and the first guide lens FL1. The second connecting member BM2 can be positioned between the second outer surface SF2 and the second guide lens FL2. The third connecting member BM3 can be positioned between the third outer surface SF3 and the third guide lens FL3. The fourth connecting member BM4 can be positioned between the fourth outer surface SF4 and the fourth guide lens FL4.

[0358] Furthermore, the first guide lens FL1 can be positioned between the first outer surface SF1 and the first light source unit 230a. The first guide lens FL1 can be coupled with the first outer surface SF1. The second guide lens FL2 can be positioned between the second outer surface SF2 and the second light source unit 230b. The second guide lens FL2 can be coupled with the second outer surface SF2. The third guide lens FL3 can be positioned between the third outer surface SF3 and the third light source unit 230c. The third guide lens FL3 can be coupled with the third outer surface SF3. The fourth guide lens FL4 can be positioned between the fourth outer surface SF4 and the lens group LS. The fourth guide lens FL4 can be coupled with the fourth outer surface SF4.

[0359] Alternatively, the first guide lens FL1 can be positioned adjacent to the first outer surface SF1. The second guide lens FL2 can be positioned adjacent to the second outer surface SF2. The third guide lens FL3 can be positioned adjacent to the third outer surface SF3. The fourth guide lens FL4 can be positioned adjacent to the fourth outer surface SF4.

[0360] In one embodiment, each lens or guide lens can be connected to each outer surface via a bonding member. The guide lens in the projecting apparatus can then suppress total internal reflection caused by light emitting to the edges of each outer surface. Therefore, a projecting apparatus can be provided in which flare is prevented or reduced.

[0361] Specifically, in the embodiment, the ratio of the refractive index of the bonding members BM1 to BM4 to the refractive index of the optical guide LG (or lens) may be 1:0.9 to 1:1.1. More preferably, the ratio of the refractive index of the bonding members BM1 to BM4 to the refractive index of the optical guide LG (or lens) may be 1:0.98 to 1:1.02. With such a configuration, total internal reflection of light is suppressed at the sides of the bonding members and the optical guide LG or lens adjacent to the bonding members, thereby reducing the degree of refraction. That is, unwanted light from the light source can not be totally reflected at each outer surface of the optical guide LG through which the light generated from the light source passes and projected or exited into the waveguide through the lens group LS.

[0362] In the project apparatus according to the embodiment, total internal reflection can be prevented on the first outer surface SF1 to the fourth outer surface SF4 of the optical guide LG by arranging lenses or guide bonding members BM1 to BM4 on the first outer surface SF1 to the fourth outer surface SF4. In other words, if total internal reflection occurs on the first outer surface SF1 to the fourth outer surface SF4, the light reflected into the optical guide LG may be emitted as unwanted light or into the waveguide. In this embodiment, total internal reflection can occur not on the first outer surface SF1 to the fourth outer surface SF4, but through the guide bonding members BM1 to BM4 and onto one side of the guide lenses FL1 to FL4 (the side in contact with air or the outside). As a result, at least a portion of the total internally reflected light can not enter the inside of the optical guide LG. This makes it possible to suppress flare or emission of unwanted light due to total internal reflection.

[0363] As an example, the material of the bonding members BM1 to BM4 may be the same as the material of the lenses FL1 to FL4 or the optical guide LG. Furthermore, the material of the bonding members BM1 to BM4 may be a material that satisfies the aforementioned ratio of refractive indices.

[0364] Referring to Figure 24, the projector apparatus according to the embodiment can suppress flare due to total internal reflection or unwanted light emission.

[0365] For example, as shown in the figure, light emitted from the first light source 232a may pass through the first optical member 233a and the first outer surface SF1, enter the optical guide LG, and then enter the second outer surface SF2 (LP1). At this time, the second outer surface SF2 is coupled with the second bonding member BM2 and the second guide lens FL2, and total internal reflection at the second outer surface SF2 can be suppressed. For example, if the second guide lens FL2 is not placed on the second outer surface SF2, the light totally reflected at the second outer surface SF2 may pass through the fourth outer surface SF4, the fourth guide lens FL4, and the lens group LS and exit into a waveguide or the like (LP2). That is, unwanted light due to total internal reflection due to flare may exit into the waveguide, potentially degrading the optical performance of the projection device. In the projection device according to the embodiment, improved optical performance can be provided by eliminating "LP2" due to total internal reflection.

[0366] Referring to Figure 25, light emitted from the third light source 232c may pass through the third optical member 233c and the third outer surface SF3, enter the optical guide LG, and then enter the fourth outer surface SF4 (LP3). At this time, the fourth outer surface SF4 is coupled with the fourth bonding member BM4 and the fourth guide lens FL4, and total internal reflection at the fourth outer surface SF4 can be suppressed. For example, if the fourth guide lens FL4 is not placed on the fourth outer surface SF4, the light totally reflected at the fourth outer surface S42 may be reflected by the coating surface (or reflective sheet) of the optical guide LG and again exit through the fourth outer surface SF4, the fourth guide lens FL4, and the lens group LS to a waveguide or the like (LP4). In other words, unwanted light due to total internal reflection due to flare may exit into the waveguide, potentially degrading the optical performance of the projection device. In the projection device according to the embodiment, improved optical performance can be provided by eliminating "LP4" due to total internal reflection.

[0367] Referring to Figure 26, light emitted from the second light source 232b may pass through the second optical member 233b and the second outer surface SF2, enter the optical guide LG, and then enter the fourth outer surface SF4 (LP5). At this time, the fourth outer surface SF4 is coupled with the fourth bonding member BM4 and the fourth guide lens FL4, and total internal reflection at the fourth outer surface SF4 can be suppressed. For example, if the fourth guide lens FL4 is not placed on the fourth outer surface SF4, the light totally reflected at the fourth outer surface SF4 may be reflected by the coating surface (or reflective sheet) of the optical guide LG and again exit through the fourth outer surface SF4, the fourth guide lens FL4, and the lens group LS to a waveguide or the like (LP6). In other words, unwanted light due to total internal reflection due to flare may exit into the waveguide, potentially degrading the optical performance of the projection device. In the projection device according to the embodiment, improved optical performance can be provided by eliminating "LP6" due to total internal reflection.

[0368] Lenses or guide lenses are positioned on each outer surface SF1 to SF4 of the optical guide LG, and each outer surface and each lens may overlap with each other. For example, the first guide lens FL1 may overlap with the first light source and the first outer surface SF1 in the second direction (Y-axis direction). The fourth guide lens FL4 may overlap with the fourth outer surface SF4 in the second direction (Y-axis direction). The second guide lens FL2 may overlap with the second light source and the second outer surface SF2 in the first direction (X-axis direction). The third guide lens FL3 may overlap with the third light source and the third outer surface SF3 in the first direction (X-axis direction). This configuration can reduce total internal reflection occurring on each outer surface of the optical guide LG.

[0369] Furthermore, the fourth guide lens FL4 may be the same size or thickness (length in the direction toward the adjacent outer surface of the optical guide) as the first guide lenses FL1 to the third guide lenses FL3, or it may be different. In examples, each lens or guide lens may have a positive or negative refractive power. For example, the first guide lenses FL1 to the fourth guide lenses FL4 may have a positive or negative refractive power. Also, the adjacent surfaces FL1s to FL3s of the first guide lenses FL1 to the third guide lenses FL3, facing the light source that emits transmitted light, may be bulging or concave toward the optical guide LG.

[0370] Referring to Figure 27, in the projection apparatus according to the embodiment, the first guide lenses FL1 to the third guide lenses FL3 may have surfaces FL1s to FL3s facing adjacent or light sources that emit transmitted light that bulge toward the optical guide LG. Alternatively, the first guide lenses FL1 to the third guide lenses FL3 may have surfaces FL1s to FL3s facing adjacent or light sources that emit transmitted light that concave toward adjacent light sources.

[0371] Furthermore, the fourth guide lens FL4 may have a concave or convex surface FL4s facing or towards the lens group LS. Also, the surface of the fourth guide lens FL4 facing the lens group LS may have a positive or negative radius of curvature. The radius of curvature can be set relative to the light traveling from the light source to the waveguide.

[0372] Furthermore, the surface FL4s of the fourth guide lens FL4 that faces or points toward the lens group LS may be flat. For example, the radius of curvature of the surface FL4s of the fourth guide lens FL4 that faces or points toward the lens group LS may be 50 or more. Also, the surfaces FL1s to FL3s of the first guide lenses FL1 to the third guide lenses FL3 that face adjacent light sources may be concave toward the adjacent light source.

[0373] Furthermore, the first guide lens FL1 to the third guide lens FL3 can have the same radius of curvature on the surface facing the light source or the surface facing the optical guide LG. For example, the first guide lens FL1 to the third guide lens FL3 can have the same curvature on the surfaces FL1s, FL2s, and FL3s facing the light source. Also, the first guide lens FL1 to the third guide lens FL3 can have the same curvature on the surface facing the optical guide LG.

[0374] Furthermore, the first guide lens FL1 to the third guide lens FL3 may have the same or different thickness as the fourth guide lens FL4.

[0375] As an example, the thicknesses d1, d2, and d3 of the first guide lenses FL1 to the third guide lens FL3 may differ from the thickness d4 of the fourth guide lens FL4. The thicknesses d1, d2, and d3 of the first guide lenses FL1 to the third guide lens FL3 may be greater than the thickness d4 of the fourth guide lens FL4. This makes it easier to secure space for lens arrangement in the lens group LS. Furthermore, by increasing the thicknesses d1, d2, and d3 of the first guide lenses FL1 to the third guide lens FL3, total internal reflection of light can occur on the surfaces of the first guide lenses FL1 to the third guide lens FL3 (outer surfaces facing the light source) that are further separated from the outer surfaces of the light guide (e.g., SF1 to SF4). This further reduces the probability that light reflection occurring on the surfaces of the first guide lenses FL1 to the third guide lens FL3 (outer surfaces facing the light source) will be projected onto the lens group LS through the fourth outer surface SF4. Therefore, the projection apparatus can provide improved optical performance.

[0376] As a variation, if the first guide lens FL1 to the third guide lens FL3 have the same thickness as the fourth guide lens FL4, ease of manufacturing can be ensured.

[0377] Figure 28 is a cross-sectional view of the project apparatus according to the eighth embodiment, showing the lens group, optical guide, lens, light source, and optical components.

[0378] Referring to Figure 28, the description of each component in the project apparatus according to the eighth embodiment can be applied in the same manner as described above, except for the content described later.

[0379] In the projection apparatus according to this embodiment, the first guide lenses FL1 to the third guide lenses FL3 may have surfaces FL1s to FL3s facing adjacent or light sources that emit transmitted light that are concave toward the optical guide LG. Alternatively, the first guide lenses FL1 to the third guide lenses FL3 may have surfaces FL1s to FL3s facing adjacent or light sources that emit transmitted light that are convex toward the adjacent light source.

[0380] Furthermore, the fourth guide lens FL4 may have a concave or convex surface FL4s facing or towards the lens group LS. Also, the surface of the fourth guide lens FL4 facing the lens group LS may have a positive or negative radius of curvature. The radius of curvature can be set relative to the light traveling from the light source to the waveguide.

[0381] Furthermore, the surface FL4s of the fourth guide lens FL4 that faces or points toward the lens group LS may be flat. For example, the radius of curvature of the surface FL4s of the fourth guide lens FL4 that faces or points toward the lens group LS may be 50 or greater.

[0382] Furthermore, the first guide lens FL1 to the third guide lens FL3 can have the same radius of curvature on the surface facing the light source or the surface facing the optical guide LG. For example, the first guide lens FL1 to the third guide lens FL3 can have the same curvature on the surfaces FL1s, FL2s, and FL3s facing the light source. Also, the first guide lens FL1 to the third guide lens FL3 can have the same curvature on the surface facing the optical guide LG.

[0383] Figure 29 is a cross-sectional view of the project apparatus according to the ninth embodiment, showing the lens group, optical guide, lens, light source, and optical components. Referring to Figure 29, the descriptions of each component in the project apparatus according to the ninth embodiment can be applied identically to the descriptions above, except for those described later.

[0384] In this embodiment, the thicknesses d1, d2, and d3 of the first guide lenses FL1 to the third guide lenses FL3 may differ from the thickness d4 of the fourth guide lens FL4. The thicknesses d1, d2, and d3 of the first guide lenses FL1 to the third guide lenses FL3 may be greater than the thickness d4 of the fourth guide lens FL4. This makes it easy to secure space for lens arrangement of the lens group LS. Alternatively, the thicknesses d1, d2, and d3 of the first guide lenses FL1 to the third guide lenses FL3 may be smaller than the thickness d4 of the fourth guide lens FL4. This makes it possible to suppress total internal reflection occurring on the fourth outer surface SF4 to the greatest extent possible.

[0385] Furthermore, the thicknesses d1, d2, and d3 of the first guide lens FL1 to the third guide lens FL3 can be different from each other.

[0386] Furthermore, the first guide lens FL1 to the third guide lens FL3 can have surfaces FL1s to FL3s adjacent to each other or facing the light source emitting transmitted light, each having a different radius of curvature. With this configuration, if there is a difference in the light distribution of the first to third light sources emitting light with different central wavelengths (e.g., RGD), the first guide lens FL1 to the third guide lens FL3 can compensate for this difference in light distribution by having surfaces FL1s to FL3s adjacent to each other or facing the light source emitting transmitted light, each having a different radius of curvature.

[0387] Figure 30 is a cross-sectional view of the project apparatus according to the 10th embodiment, showing the lens group, optical guide, lens, light source, and optical components.

[0388] Referring to Figure 30, the explanation of each component in the project apparatus according to the 10th embodiment can be the same as described above, except for the content to be described later.

[0389] As an example, the fourth guide lens FL4 may have a positive or negative radius of curvature on the surface facing the lens group LS. For example, the surface FL4s of the fourth guide lens FL4 facing the lens group LS may be convex or concave toward the lens group LS.

[0390] This configuration allows for the suppression of total internal reflection and the additional performance of optical functions such as light focusing. Furthermore, it enables the miniaturization of projector equipment.

[0391] Figure 31 is a cross-sectional view of the project apparatus according to the 11th embodiment, showing the lens group, optical guide, lens, light source, and optical components.

[0392] Referring to Figure 31, the description of each component in the project apparatus according to the 10th embodiment can be the same as described above, except for the content to be described later.

[0393] According to the embodiment, the outer surface of the optical guide LG in the projecting device may include the fifth outer surface SF5 and the sixth outer surface SF6. The fifth outer surface SF5 and the sixth outer surface SF6 may be outer surfaces of the optical guide LG other than the first outer surface SF1 to the fourth outer surface SF4.

[0394] Furthermore, the lens or guide lens may include a fifth guide lens FL5 and a sixth guide lens FL6.

[0395] A fifth guide lens FL5 may be positioned on the fifth outer surface SF5. The fifth guide lens FL5 can be coupled to the fifth outer surface SF5. A fifth connecting member may be positioned between the fifth guide lens FL5 and the fifth outer surface SF5. The fifth connecting member allows the fifth guide lens FL5 and the fifth outer surface SF5 to be coupled to each other.

[0396] A sixth guide lens FL6 may be positioned on the sixth outer surface SF6. The sixth guide lens FL6 can be coupled to the sixth outer surface SF6. A sixth connecting member may be positioned between the sixth guide lens FL6 and the sixth outer surface SF6. The sixth connecting member allows the sixth guide lens FL6 and the sixth outer surface SF6 to be coupled to each other.

[0397] As an example, the fifth guide lens FL5 and the sixth guide lens FL6 may have the same or different thickness as at least one of the first guide lenses FL1 to the fourth guide lenses FL4. For example, the fifth guide lens FL5 and the sixth guide lens FL6 may have the same thickness as at least one of the first guide lenses FL1 to the fourth guide lenses FL4. This ensures ease of manufacturing the guide lenses.

[0398] Furthermore, the fifth guide lens FL5 and the sixth guide lens FL6 may have different thicknesses from at least one of the first guide lenses FL1 to the fourth guide lenses FL4. For example, the thicknesses of the fifth guide lens FL5 and the sixth guide lens FL6 may be greater than the thickness of at least one of the first guide lenses FL1 to the fourth guide lenses FL4. Even if light is emitted to the outside through the fifth outer surface SF5 and the sixth outer surface SF of the optical guide LG, it does not affect the projection, and additional components such as lens groups or light sources may not be placed. In other words, since there is space on the fifth outer surface SF5 and the sixth outer surface SF side of the optical guide LG, the thicknesses of the fifth guide lens FL5 and the sixth guide lens FL6 can be increased. This can suppress the return of light reflected from the outer surface of the fifth guide lens FL5 and the sixth guide lens FL6 (the outer surface in the opposite direction to the direction toward the optical guide) to the optical guide LG. This can improve optical performance.

[0399] Figure 32 is a diagram illustrating various examples of lenses in the project apparatus according to the embodiment.

[0400] Referring to Figure 32, in the project apparatus according to the embodiment, the lens or guide lens can be arranged on the outer surface of the optical guide LG in various forms. The aforementioned guide lens can have a D-cut shape, an I-cut shape, or a circular shape.

[0401] For example, the angles, sides, or planes of a lens can have the same curvature or radius of curvature. Or, at least one angle, side, or plane of a lens can have opposite angles, sides, or planes with the same curvature (or radius of curvature). Or, at least one angle, side, or plane of a lens can have opposite angles, sides, or planes with different curvatures (or radii of curvature).

[0402] Figure 33 is a perspective view of an optical guide in one example of a project apparatus according to the 12th embodiment, Figure 34 is a perspective view of an optical guide in another example of a project apparatus according to the 12th embodiment, and Figure 35 is a cross-sectional view of an optical guide in one example of use, viewed after cutting at BB' in Figure 34.

[0403] Referring to Figures 33 to 35, as described above, in the project apparatus according to the embodiment, the optical guide LG can include grooves EG1, EG2, EG3, and EG4 located on the edge of the surface facing at least one of the light source units 230a, 230b, 230c (or light source) and the lens group LS. For example, the optical guide LG can include grooves EG1, EG2, and EG3 located on the edge of the surface facing the light source units 230a, 230b, 230c (or light source). The optical guide LG can also include grooves located on the edge of the surface facing at least one of the light source units. And it can include groove EG4 located on the edge of the surface facing the lens group LS. The grooves may be called "edge grooves," "optical guide surface grooves," etc.

[0404] As an example, the optical guide LG may have six surfaces. In this project's apparatus, a surface on the optical guide LG refers to a surface that faces either the light source or the lens group.

[0405] For example, the surface of the optical guide LG may include a first surface SF1 to a third surface SF3 facing each of the light sources 232a, 232b, and 232c. The first surface SF1 may face the first light source 232a or the first light source unit 230a. The second surface SF2 may face the second light source 232b or the second light source unit 230b. The third surface SF3 may face the third light source 232c or the third light source unit 230c. Alternatively, the first light source 232a or the first light source unit may correspond to the first surface SF1. The second light source 232b or the second light source unit may correspond to the second surface SF2. The third light source 232c or the third light source unit may correspond to the third surface SF3. The surface or outer surface of the optical guide LG may be called the "optical guide surface" or "outer surface".

[0406] Furthermore, the surface may include a fourth surface SF4. The fourth surface SF4 may be the optical guide LG facing the lens group LS. And the fourth surface SF4 can correspond to the lens group LS.

[0407] As mentioned above, grooves can be located on the edges of the surface of the optical guide LG. Furthermore, grooves can be formed or located on the edges of each surface. In an embodiment, the grooves may include a first groove EG1, a second groove EG2, a third groove EG3, and a fourth groove EG.

[0408] The first groove EG1 may be located or formed on the first surface SF1. The second groove EG2 may be located or formed on the second surface SF2. The third groove EG3 may be located or formed on the third surface SF3. The fourth groove EG4 may be located or formed on the fourth surface SF4.

[0409] The optical guide GL may include a first projection PR1 that protrudes toward the first light source (or first light source) into the first groove EG1 on the first surface SF1. In other words, the projection device according to the embodiment may include a projection located inside the groove on a surface.

[0410] Similarly, the optical guide LG may be located inside the second groove EG2 on the second surface SF2 and may include a second projection PR2 that protrudes toward the second light source (or second light source). The optical guide LG may be located inside the third groove EG3 on the third surface SF3 and may include a third projection PR3 that protrudes toward the third light source (or third light source).

[0411] Furthermore, the first guide lens FL1 can be positioned between the first surface SF1 and the first light source unit 230a. The second guide lens FL2 can be positioned between the second surface SF2 and the second light source unit 230b. The third guide lens FL3 can be positioned between the third surface SF3 and the third light source unit 230c.

[0412] Alternatively, the first guide lens FL1 can be positioned adjacent to the first surface SF1. The second guide lens FL2 can be positioned adjacent to the second surface SF2. The third guide lens FL3 can be positioned adjacent to the third surface SF3.

[0413] In some embodiments, each lens or guide lens may be positioned in contact with or at a distance from each surface. For example, the first guide lens FL1 may be in contact with or at a distance from the first surface SF1. The first guide lens FL1 may have a predetermined gap with the first surface SF1. The second guide lens FL2 may be in contact with or at a distance from the second surface SF2. The third guide lens FL3 may be in contact with or at a distance from the third surface SF3.

[0414] In the optical guide LG, grooves can be formed by cutting the edges of a hexahedron. As shown in the illustration, each groove EG1 to EG4 may have a vertical inclination as well as a gentle inclination angle. For example, each groove EG1 to EG4 may have an inner surface that bulges inward towards the optical guide LG or towards an adjacent light source.

[0415] In other words, the optical guide LG can have grooves EG1 to EG4 formed on the edges of the surfaces (corresponding to the surfaces) from which light is emitted through the optical guide LG. With this configuration, total internal reflection caused by light emitting to the edges of each surface can be suppressed. Therefore, a projector can be provided in which flare phenomena are prevented or reduced.

[0416] Further mask layers may be placed in grooves EG1 to EG4. These mask layers may include, for example, black lacquer, corrosion treatment materials, etc. This allows for more effective suppression of the total internal reflection phenomenon that causes the aforementioned flare phenomenon.

[0417] The lenses or guide lenses can be positioned on the grooves and overlap with each lens. For example, the first guide lens FL1 can be positioned on the first groove EG1 and the first projection PR1. In this case, the first groove EG1 can be located outside the first projection PR1, or the first projection PR1 can be located inside the first groove EG1. The first guide lens FL1 can overlap the first groove EG1 in the second direction (Y-axis direction). This allows the first projection PR1 to overlap the first guide lens FL1. As a result, a space can exist along the edge between the first guide lens FL1 and the first surface SF1. This aforementioned space can correspond to the groove (first groove). With this configuration, the effective area of ​​light can be maximized while reducing the path of total internal reflection occurring on each surface.

[0418] Similarly, the second guide lens FL2 can be positioned on the second groove EG2 and the second projection PR2. In this case, the second groove EG2 can be located outside the second projection PR2, or the second projection PR2 can be located inside the second groove EG2. The second guide lens FL2 can overlap the second groove EG2 in the first direction (X-axis direction). This allows the second projection PR2 to overlap with the second guide lens FL2. As a result, a space can exist along the edge between the second guide lens FL2 and the second surface SF2. This aforementioned space can correspond to a groove (second groove).

[0419] Furthermore, the third guide lens FL3 can be positioned on the third groove EG3 and the third projection PR3. In this case, the third groove EG3 can be located outside the third projection PR3, or the third projection PR3 can be located inside the third groove EG3. The third guide lens FL3 can overlap the third groove EG3 in the first direction (X-axis direction). This allows the third projection PR3 to overlap with the third guide lens FL3. As a result, a space can exist along the edge between the third guide lens FL3 and the third surface SF3. This aforementioned space can correspond to the groove (third groove).

[0420] The fourth guide lens FL4 can correspond to the lens (ln, Figure 8) in the lens group LS that is closest to the light source or optical guide LG. The following explanation will use this as a reference. The fourth guide lens FL4 can be positioned on the fourth groove EG4 and the fourth projection PR4. In this case, the fourth groove EG4 can be located outside the fourth projection PR4, or the fourth projection PR4 can be located inside the fourth groove EG4. The fourth guide lens FL4 can overlap the fourth groove EG4 in the second direction (Y-axis direction). This allows the fourth projection PR4 to overlap with the fourth guide lens FL4. As a result, a space can exist along the edge between the fourth guide lens FL4 and the fourth surface SF4. The aforementioned space can correspond to the groove (fourth groove).

[0421] Furthermore, the first projection PR1 can be positioned opposite to the fourth projection PR4. The first projection PR1 can overlap the fourth projection PR4 in the second direction by at least a portion. Also, the first groove EG1 can be positioned opposite to the fourth groove EG4. The first groove EG1 and the fourth groove EG4 can overlap in the second direction (Y-axis direction) by at least a portion.

[0422] Furthermore, the second projection RP2 can be positioned opposite the third projection PR3. The second projection PR2 can overlap the third projection PR3 in the second direction (Y-axis direction) to at least a portion of it. Also, the second groove EG2 can be positioned opposite the third groove EG3. The second groove EG3 and the fourth groove EG4 can overlap in the second direction (Y-axis direction) to at least a portion of it.

[0423] In this example, each lens or guide lens may have a positive or negative refractive power. For example, the first guide lens FL1 to the third guide lens FL3 may have a positive or negative refractive power.

[0424] Furthermore, the surface of each lens or guide lens facing an adjacent light source may bulge toward the light source. For example, the surface of the first guide lens FL1 facing the first light source or adjacent to the first light source may bulge toward the first light source. Similarly, the surface of the second guide lens FL2 facing the second light source or adjacent to the second light source may bulge toward the second light source. The surface of the third guide lens FL3 facing the third light source or adjacent to the third light source may bulge toward the third light source. The surface of each guide lens adjacent to the optical guide LG may have a large radius of curvature or be flat. In contrast, the surface of each guide lens adjacent to the light source may bulge toward the light source. This allows light to converge from the optical guide toward the light source. Conversely, light may diverge from the light source toward the optical guide.

[0425] Furthermore, the projecting apparatus may, as a variation, include additional lenses in contact with each surface. For example, additional lenses may be placed between the optical guide LG and each guide lens.

[0426] Furthermore, in the project apparatus according to the embodiment, each groove can have an open-loop or closed-loop structure on the surface. As shown in the figure, the groove can have an open-loop structure on the surface.

[0427] Further examination of Figure 34 reveals that in the project device according to the embodiment, the grooves can have an open-loop structure on a plane. On the first plane SF1, the first groove EG1 can have an open-loop structure on a plane (XZ). On the second plane SF2, the second groove EG2 can have an open-loop structure on a plane (YZ). On the third plane SF3, the third groove EG3 can have an open-loop structure on a plane (YZ). On the fourth plane SF4, the fourth groove EG4 can have an open-loop structure on a plane (XZ). For example, each projection can have an additional projection extending outward. With such a configuration, the projections can have different lengths on a plane. For example, the projections can have different lengths in a second or third direction. For example, the second projection (or third projection) can have different lengths in the second direction and in the third direction.

[0428] Figure 36 is a cross-sectional view of an optical guide relating to another use case of the project apparatus according to the 12th embodiment.

[0429] Referring to Figure 36, the description of the optical guide described above can be applied to the optical guide, except for the details to be described later. The optical guide LG in other use cases may be made of a different component with a protrusion. That is, the optical guide LG may consist of a prism, a bonding member BM, and an attached lens. In this case, the protrusion can correspond to the attached lens.

[0430] This allows the optical guide LG to have a structure that includes attached lenses corresponding to each protrusion located on each surface, and prisms connected to the attached lenses via bonding members BM. For example, the first protrusion can be connected to the prism via the first bonding member BM1. The second protrusion can be connected to the prism via the second bonding member BM2. The third protrusion can be connected to the prism via the third bonding member BM3. And the fourth protrusion can be connected to the prism via the fourth bonding member BM4.

[0431] The attached lens projection may not be a hexahedron as shown in the figure, but may have various shapes such as a circular shape on a plane corresponding to the guide lens, or a projection that partially contacts the prism.

[0432] With this configuration, the optical guide LG can have protrusions and grooves, as described above. This makes it possible to provide a projecting apparatus in which flare is prevented or reduced, as described above. It also makes it possible to provide a projecting apparatus that is easy to manufacture.

[0433] In this case, the bonding member BM may be made of a material having the same or a similar refractive index as the prism or attached lens. Furthermore, the bonding member BM may be made of a light-transmitting material.

[0434] Furthermore, the attached lens in the optical guide LG may have a length or width smaller than the length or width of the surface. That is, it may be larger than the overall width of one surface of the optical guide or the width or length of an attached lens positioned in one direction within a portion of the surface. This allows for easier assembly and facilitates the suppression of flare due to total internal reflection through the groove.

[0435] As a variation, the optical guide may have grooves on one surface due to cutting, as described above, and grooves on other surfaces through the attached lens and bonding member.

[0436] Figure 37 is a perspective view of an optical guide for another use case of the projection apparatus according to the 12th embodiment, and Figure 38 is a cross-sectional view of an optical guide with a masking layer added to the projection apparatus according to the 12th embodiment.

[0437] Referring to Figures 37 and 38, the projecting apparatus according to the embodiment may include a masking layer M that is placed on at least a portion of each groove.

[0438] A masking layer M can be positioned on the bottom surface EGS or side surface PRS of each groove EG1 to EG4. The side surface PRS of the groove can correspond to the side surface of each protrusion. Similarly, the bottom surface EGS of the groove can correspond to the side surfaces of the protrusions on the remaining surfaces (surfaces other than the first to fourth surfaces) of the optical guide LG. For example, the first masking layer M1 can be positioned in the first groove EG1. The second masking layer M2 can be positioned in the second groove EG2. The third masking layer M3 can be positioned in the third groove EG3. The fourth masking layer M4 can be positioned in the fourth groove EG4.

[0439] The masking layer M can be located in the first groove EG1 to the fourth groove EG4. Consequently, light emitted from the light source can pass through each guide lens, along the edges of each surface, and not exit through the fourth guide lens FL4 and the lens group. In other words, total internal reflection occurring at the edges of the light guide LG can be efficiently blocked by the masking layer M. For example, the masking layer M may be made of a light-absorbing material.

[0440] As another example, the masking layer M may be placed in only some of the grooves. For instance, only the first masking layer M1 to the third masking layer M4 may be located in the groove of the optical guide LG. This allows for an efficient reduction of total internal reflection for light incident from the light source onto the optical guide LG.

[0441] As a variation, the masking layer M can be located in a portion of the side PRS of the groove. For example, the masking layer M can be located adjacent to the edge on the side PRS of the groove. The masking layer does not need to be located in the region adjacent to the center of the optical guide on the side PRS of the groove. Alternatively, the masking layer M can be located adjacent to the edge on the bottom EGS of the groove. The masking layer does not need to be located in the region adjacent to the center of the optical guide on the bottom EGS of the groove.

[0442] Figure 39 is a diagram illustrating the relationship between the optical guide and the light source in a project apparatus according to the 12th embodiment.

[0443] Referring to Figure 39, in the projecting device, the first to third light sources can correspond to the length ratio of the opposing first surface SF1 to third surface SF3. For example, in the first light source unit 320a, the first light source 232a can have a first length ratio of length L2 in the first direction to length L1 in the third direction.

[0444] Furthermore, the first projection PR1 of the first surface SF1 may have a second length ratio of length L2 in the first direction to length L3 in the third direction. In this case, the first length ratio and the second length ratio may be similar or identical. If they are similar, the first length ratio may be within 10% of the second length ratio. Such a configuration can provide a more effective flare reduction effect.

[0445] Furthermore, the area of ​​the light source may be smaller than the area of ​​each surface. For example, the area of ​​the first light source 232a (XZ plane) may be smaller than the area of ​​the first surface SF (XZ plane).

[0446] Figure 40 is a drawing of the project apparatus according to the 13th embodiment.

[0447] Referring to Figure 40, the description of each component in the project apparatus according to the 13th embodiment can be the same as described above, except for the content to be described later.

[0448] In this embodiment, the optical guide LG can be separated from or in contact with the guide lenses FL1 to FL4, as described above. In this case, the guide lenses FL1 to LF4 are arranged on the surfaces SF1 to SF4 of the optical guide LG, and may be smaller than the length or width of the surface.

[0449] In other words, the guide lens can be positioned in the inner region of the groove on the surface. This means that the lens or guide lens is not positioned on the groove and therefore does not overlap with it. For example, the first guide lens FL1 can be positioned on the first projection PR1. In this case, the first groove EG1 can be positioned outside the first projection PR1, or the first projection PR1 can be positioned inside the first groove EG1. The first guide lens FL1 can not overlap with the first groove EG1 in the second direction (Y-axis direction). The first projection PR1 can overlap with the first guide lens FL1. This means that the first guide lens FL1 can be positioned within the open region of the first surface SF1.

[0450] Similarly, the second guide lens FL2 may be positioned on the second projection PR2. In this case, the second groove EG2 may be located outside the second projection PR2, or the second projection PR2 may be located inside the second groove EG2. The second guide lens FL2 may not overlap with the second groove EG2 in the first direction (X-axis direction). The second projection PR2 may overlap with the second guide lens FL2.

[0451] Furthermore, the third guide lens FL3 may be positioned on the third projection PR3. In this case, the third groove EG3 may be located outside the third projection PR3, or the third projection PR3 may be located inside the third groove EG3. The third guide lens FL3 may not overlap with the third groove EG3 in the first direction (X-axis direction). The third projection PR3 may overlap with the third guide lens FL3.

[0452] The fourth guide lens FL4 may be positioned on the fourth projection PR4. In this case, the fourth groove EG4 may be located outside the fourth projection PR4, or the fourth projection PR4 may be located inside the fourth groove EG4. The fourth guide lens FL4 may not overlap with the fourth groove EG4 in the second direction (Y-axis direction), or the fourth projection PR4 may overlap with the fourth guide lens FL4.

Claims

1. The barrel in which the lens group is arranged; An optical guide positioned within the barrel; A light source that emits light into the aforementioned optical guide; A lens positioned between the light source and the optical guide; and A masking layer disposed between the optical guide and the lens or between the optical guide and the lens group; A projecting apparatus in which the masking layer is positioned along the edge of the outer surface of the optical guide.

2. The outer surface of the aforementioned optical guide is The first to third outer surfaces facing the light source; and The projection apparatus according to claim 1, further comprising a fourth outer surface facing the lens group.

3. The projecting apparatus according to claim 2, wherein the masking layer is disposed on at least one of the first to fourth outer surfaces.

4. The projecting apparatus according to claim 3, wherein the masking layer includes a first masking layer to a fourth masking layer disposed on each of the first to fourth outer surfaces.

5. The projecting apparatus according to claim 1, further comprising: a bonding member disposed between the optical guide and the lens or between the optical guide and the lens group.

6. The projecting apparatus according to claim 5, wherein the joining member is in contact with the masking layer, the lens, and the optical guide.

7. The projection apparatus according to claim 1, wherein the masking layer is in contact with the outer surface of the lens or the optical guide.

8. The optical guide includes a fifth outer surface and a sixth outer surface, The projection apparatus according to claim 2, wherein the fifth outer surface and the sixth outer surface are outer surfaces of the optical guide other than the first to fourth outer surfaces.

9. The projecting apparatus according to claim 8, wherein the masking layer includes a first masking layer to a fourth masking layer disposed on the first outer surface to the fourth outer surface.

10. Projection apparatus according to claim 9, further comprising: a fifth masking layer disposed on the fifth outer surface and a sixth masking layer disposed on the sixth outer surface.

Images