Projector device and electronic device comprising same

Abstract

An embodiment discloses a projector device comprising: a first light source unit for emitting light in a first direction; a second light source unit for emitting light in a second direction perpendicular to the first direction; and a reflection unit for transmitting the light emitted from the first light source unit and reflecting the light emitted from the second light source unit, wherein the first light source unit includes a plurality of first light sources and second light sources for emitting light of different wavelength bands, and a first substrate on which the first light sources and the second light sources are disposed, and the second light sources are disposed to overlap some of the plurality of first light sources in the first direction.

Description

Project device and electronic device including same

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

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

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

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

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

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

[0007] The embodiment provides a projector device and an electronic device including the same, which can reduce the number of panels of a light source unit, reduce the volume by removing an X-cube, and improve optical performance when using a projector device used for AR (Augmented Reality) and an electronic device including the same.

[0008] In addition, the space in which the light source is placed is reduced, providing a projector and electronic device that can be miniaturized more easily.

[0009] In addition, a projector and electronic device are provided that improve optical performance by enhancing the light collection accuracy of multiple light sources.

[0010] The problem to be solved in the embodiment is not limited to this, and it can be said that the purpose or effect that can be understood from the solution or embodiment of the problem described below is also included.

[0011] A projector device according to an embodiment includes a first light source unit that emits light in a first direction; a second light source unit that emits light in a second direction perpendicular to the first direction; and a reflection unit that transmits light emitted from the first light source unit and reflects light emitted from the second light source unit, wherein the first light source unit includes a plurality of first light sources and second light sources that emit light of different wavelength bands, and a first substrate on which the first light sources and the second light sources are arranged, and the second light sources may be arranged to overlap some of the plurality of first light sources in a first direction perpendicular to the first substrate.

[0012] The plurality of first light sources may be arranged on the first substrate at a predetermined distance from each other in the second direction.

[0013] The second light source is disposed on the first light source, and a distance between the plurality of second light sources in the second direction may be greater than a distance between the plurality of first light sources in the second direction.

[0014] The first light source can emit light in a blue wavelength band, and the second light source can emit light in a green wavelength band.

[0015] The first light source unit may include a first region where the first light source and the second light source overlap and a second region where the first light source and the second light source do not overlap.

[0016] The first region of the first light source unit can emit light in the green wavelength band, and the second region can emit light in the blue wavelength band.

[0017] A project device according to an embodiment includes a projection lens unit, and the reflection unit can reflect light emitted by the second light source unit to the projection lens unit.

[0018] The optical axes of the first light source and the second light source in the first region may be the same.

[0019] The first light source unit may include a support layer disposed on the first substrate, the first light source may be disposed on the support layer, and the second light source may be disposed between the first substrate and the support layer.

[0020] The support layer includes a groove on a surface facing the first substrate, and the second light source can be placed in the groove of the support layer.

[0021] The width of the second light source in the second direction may be equal to the width of the first light source in the second direction, or the width of the second light source in the second direction may be greater than the width of the first light source in the second direction.

[0022] The width of the second light source in the second direction may be less than or equal to twice the width of the first light source in the second direction.

[0023] The width of the above support layer in the first direction may be 1 μm to 10 μm.

[0024] The separation distance in the second direction between the plurality of first light sources may be 0.8 μm to 1.2 μm.

[0025] The second light source unit may include a plurality of third light sources that emit light of a different wavelength band from the first light source and the second light source, and a second substrate on which the third light sources are arranged.

[0026] The plurality of third light sources of the second light source unit may be arranged on the second substrate at a predetermined distance from each other in the first direction.

[0027] The diameter of the first light source to the third light source may be 3 μm to 4 μm.

[0028] According to an embodiment, when using a projector device used for AR (Augmented Reality) and an electronic device including the same, a projector device and an electronic device including the same can be provided that can reduce the number of panels of a light source unit, reduce the volume by removing an X-cube, and improve optical performance.

[0029] In addition, the space in which the light source is placed can be reduced, thereby providing a projector and electronic device that can be miniaturized more easily.

[0030] In addition, a projector and electronic device can be provided that improve optical performance by improving the light collection accuracy of multiple light sources.

[0031] The various advantageous and beneficial effects of the present invention are not limited to the above-described contents, and will be more easily understood in the course of explaining specific embodiments of the present invention.

[0032] Figure 1 is a conceptual diagram showing an embodiment of an AI device,

[0033] FIG. 2 is a block diagram showing the configuration of an extended reality electronic device according to an embodiment of the present invention.

[0034] FIG. 3 is a perspective view of an augmented reality electronic device according to a first embodiment of the present invention;

[0035] Figures 4 to 6 are conceptual diagrams for explaining various display methods applicable to the display unit according to an embodiment of the present invention.

[0036] Fig. 7 is a perspective view of a project device according to an embodiment;

[0037] Fig. 8 is another perspective view of a project device according to an embodiment;

[0038] Figure 9 is a schematic diagram of the inside of a project device according to an embodiment;

[0039] Fig. 10 is a schematic diagram of the inside of a project device according to another embodiment;

[0040] Fig. 11 is a drawing showing a method for manufacturing a first light source unit of a project device according to an embodiment.

[0041] Fig. 12 is a drawing showing a method for manufacturing a first light source unit of a project device according to another embodiment.

[0042] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0043] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0044] In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0045] Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0046] In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and / or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

[0047] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

[0048] These terms are intended only to distinguish one component from another, and are not intended to limit the nature, order, or sequence of the component.

[0049] And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, it may include not only cases where the component is directly connected, coupled or connected to the other component, but also cases where the component is 'connected', 'coupled' or 'connected' by another component between the component and the other component.

[0050] Additionally, when described as being formed or arranged "above or below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below", it can include the meaning of a downward direction as well as an upward direction based on one component.

[0051] Figure 1 is a conceptual diagram illustrating an embodiment of an AI device.

[0052] Referring to FIG. 1, an AI system is connected to a cloud network (10) by at least one of an AI server (16), a robot (11), an autonomous vehicle (12), an XR device (13), a smartphone (14), or an appliance (15). Here, a robot (11), an autonomous vehicle (12), an XR device (13), a smartphone (14), or an appliance (15) to which AI technology is applied may be referred to as an AI device (11 to 15).

[0053] A cloud network (10) may refer to a network that constitutes part of a cloud computing infrastructure or exists within a cloud computing infrastructure. Here, the cloud network (10) may be configured using a 3G network, a 4G or LTE (Long Term Evolution) network, a 5G network, etc.

[0054] That is, each device (11 to 16) constituting the AI ​​system can be connected to each other through a cloud network (10). In particular, each device (11 to 16) can communicate with each other through a base station, but can also communicate with each other directly without going through a base station.

[0055] The AI ​​server (16) may include a server that performs AI processing and a server that performs operations on big data.

[0056] The AI ​​server (16) is connected to at least one of the AI ​​devices constituting the AI ​​system, such as a robot (11), an autonomous vehicle (12), an XR device (13), a smartphone (14), or a home appliance (15), through a cloud network (10), and can assist at least part of the AI ​​processing of the connected AI devices (11 to 15).

[0057] At this time, the AI ​​server (16) can train an artificial neural network according to a machine learning algorithm on behalf of the AI ​​devices (11 to 15), and can directly store the learning model or transmit it to the AI ​​devices (11 to 15).

[0058] At this time, the AI ​​server (16) can receive input data from the AI ​​devices (11 to 15), infer a result value for the received input data using a learning model, and generate a response or control command based on the inferred result value and transmit it to the AI ​​devices (11 to 15).

[0059] Alternatively, the AI ​​device (11 to 15) may infer a result value for input data using a direct learning model and generate a response or control command based on the inferred result value.

[0060] <AI+로봇>

[0061] Robots (11) can be implemented as guide robots, transport robots, cleaning robots, wearable robots, entertainment robots, pet robots, unmanned flying robots, etc. by applying AI technology.

[0062] The robot (11) may include a robot control module for controlling movement, and the robot control module may mean a software module or a chip that implements the same as hardware.

[0063] The robot (11) can obtain status information of the robot (11), detect (recognize) the surrounding environment and objects, generate map data, determine a movement path and driving plan, determine a response to user interaction, or determine an action using sensor information obtained from various types of sensors.

[0064] Here, the robot (11) can use sensor information acquired from at least one sensor among lidar, radar, and camera to determine a movement path and driving plan.

[0065] The robot (11) can perform the above-described operations using a learning model comprised of at least one artificial neural network. For example, the robot (11) can recognize its surroundings and objects using the learning model, and determine operations using the recognized surrounding environment information or object information. Here, the learning model may be learned directly by the robot (11) or by an external device such as an AI server (16).

[0066] At this time, the robot (11) may perform an action by generating a result using a direct learning model, but it may also perform an action by transmitting sensor information to an external device such as an AI server (16) and receiving the result generated accordingly.

[0067] The robot (11) can determine a movement path and a driving plan using at least one of map data, object information detected from sensor information, or object information acquired from an external device, and control a driving unit to drive the robot (11) according to the determined movement path and driving plan.

[0068] Map data may include object identification information for various objects positioned in the space where the robot (11) moves. For example, map data may include object identification information for fixed objects such as walls and doors, as well as movable objects such as flower pots and desks. Furthermore, object identification information may include name, type, distance, location, etc.

[0069] Additionally, the robot (11) can perform actions or drive by controlling the driving unit based on the user's control / interaction. At this time, the robot (11) can acquire intention information regarding the interaction based on the user's actions or voice utterances, and determine a response based on the acquired intention information to perform the action.

[0070] <AI+자율주행>

[0071] Autonomous vehicles (12) can be implemented as mobile robots, vehicles, unmanned aerial vehicles, etc. by applying AI technology.

[0072] An autonomous vehicle (12) may include an autonomous driving control module for controlling autonomous driving functions. The autonomous driving control module may refer to a software module or a chip implementing the same as hardware. The autonomous driving control module may be included internally as a component of the autonomous vehicle (12), but may also be configured as separate hardware and connected to the exterior of the autonomous vehicle (12).

[0073] An autonomous vehicle (12) can obtain status information of the autonomous vehicle (12), detect (recognize) the surrounding environment and objects, generate map data, determine a movement path and driving plan, or determine an action by using sensor information obtained from various types of sensors.

[0074] Here, the autonomous vehicle (12) can use sensor information acquired from at least one sensor among lidar, radar, and camera, similar to the robot (11), to determine the movement path and driving plan.

[0075] In particular, an autonomous vehicle (12) can recognize an environment or object in an area where the field of vision is obscured or an area beyond a certain distance by receiving sensor information from external devices, or can receive information recognized directly from external devices.

[0076] An autonomous vehicle (12) can perform the above-described operations using a learning model comprised of at least one artificial neural network. For example, the autonomous vehicle (12) can recognize its surroundings and objects using the learning model, and determine a driving route using the recognized surrounding environment information or object information. Here, the learning model may be learned directly by the autonomous vehicle (12) or by an external device such as an AI server (16).

[0077] At this time, the autonomous vehicle (12) may perform an action by generating a result using a direct learning model, but may also perform an action by transmitting sensor information to an external device such as an AI server (16) and receiving the result generated accordingly.

[0078] An autonomous vehicle (12) can determine a movement path and a driving plan using at least one of map data, object information detected from sensor information, or object information acquired from an external device, and control a driving unit to drive the autonomous vehicle (12) according to the determined movement path and driving plan.

[0079] Map data may include object identification information for various objects located in the space (e.g., road) where the autonomous vehicle (12) travels. For example, map data may include object identification information for fixed objects such as streetlights, rocks, and buildings, as well as movable objects such as vehicles and pedestrians. Furthermore, object identification information may include name, type, distance, location, and the like.

[0080] Additionally, the autonomous vehicle (12) can perform actions or drive by controlling the driving unit based on the user's control / interaction. At this time, the autonomous vehicle (12) can acquire intention information regarding the interaction based on the user's actions or voice utterances, and determine a response based on the acquired intention information to perform the action.

[0081] <AI+XR>

[0082] The XR device (13) can be implemented as an HMD (Head-Mount Display), a HUD (Head-Up Display) equipped in a vehicle, a television, a mobile phone, a smart phone, a computer, a wearable device, a home appliance, digital signage, a vehicle, a fixed robot, or a mobile robot by applying AI technology.

[0083] The XR device (13) can obtain information about the surrounding space or real objects by analyzing 3D point cloud data or image data acquired through various sensors or from an external device to generate location data and attribute data for 3D points, and can render and output an XR object to be output. For example, the XR device (13) can output an XR object including additional information about a recognized object in correspondence with the recognized object.

[0084] The XR device (13) can perform the above-described operations using a learning model composed of at least one artificial neural network. For example, the XR device (13) can recognize a real-world object from 3D point cloud data or image data using the learning model, and provide information corresponding to the recognized real-world object. Here, the learning model may be learned directly in the XR device (13) or learned from an external device such as an AI server (16).

[0085] At this time, the XR device (13) may perform an action by generating a result using a direct learning model, but may also perform an action by transmitting sensor information to an external device such as an AI server (16) and receiving the result generated accordingly.

[0086] <AI+로봇+자율주행>

[0087] Robots (11) can be implemented as guide robots, transport robots, cleaning robots, wearable robots, entertainment robots, pet robots, unmanned flying robots, etc. by applying AI technology and autonomous driving technology.

[0088] A robot (11) to which AI technology and autonomous driving technology are applied may refer to a robot itself with autonomous driving functions, or a robot (11) that interacts with an autonomous vehicle (12).

[0089] A robot (11) with autonomous driving function can be a general term for devices that move on their own along a given path without user control or move by determining the path on their own.

[0090] A robot (11) and a self-driving vehicle (12) with autonomous driving capabilities may use a common sensing method to determine one or more of a movement path or a driving plan. For example, a robot (11) and a self-driving vehicle (12) with autonomous driving capabilities may use information sensed through lidar, radar, and cameras to determine one or more of a movement path or a driving plan.

[0091] A robot (11) interacting with an autonomous vehicle (12) may exist separately from the autonomous vehicle (12), and may be linked to autonomous driving functions inside or outside the autonomous vehicle (12), or may perform actions linked to a user riding in the autonomous vehicle (12).

[0092] 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).

[0093] Alternatively, a robot (11) interacting with an autonomous vehicle (12) may monitor a user riding in the autonomous vehicle (12) or control the functions of the autonomous vehicle (12) through interaction with the user. For example, if the robot (11) determines that the driver is drowsy, it may activate the autonomous driving function of the autonomous vehicle (12) or assist in controlling the driving unit of the autonomous vehicle (12). Here, the functions of the autonomous vehicle (12) controlled by the robot (11) may include not only the autonomous driving function, but also functions provided by a navigation system or audio system installed inside the autonomous vehicle (12).

[0094] Alternatively, a robot (11) interacting with an autonomous vehicle (12) may provide information to the autonomous vehicle (12) or assist functions from outside the autonomous vehicle (12). For example, the robot (11) may provide traffic information, including signal information, to the autonomous vehicle (12), such as a smart traffic light, or may interact with the autonomous vehicle (12) to automatically connect an electric charger to a charging port, such as an automatic electric charger for an electric vehicle.

[0095] <AI+로봇+XR>

[0096] Robots (11) can be implemented as guide robots, transport robots, cleaning robots, wearable robots, entertainment robots, pet robots, unmanned flying robots, drones, etc. by applying AI technology and XR technology.

[0097] A robot (11) to which XR technology is applied may refer to a robot that is the subject of control / interaction within an XR image. In this case, the robot (11) is distinct from the XR device (13) and can be linked with each other.

[0098] When a robot (11) that is the target of control / interaction within an XR image obtains sensor information from sensors including a camera, the robot (11) or the XR device (13) can generate an XR image based on the sensor information, and the XR device (13) can output the generated XR image. In addition, the robot (11) can operate based on a control signal input through the XR device (13) or a user's interaction.

[0099] For example, a user can check an XR image corresponding to the viewpoint of a remotely connected robot (11) through an external device such as an XR device (13), and through interaction, adjust the autonomous driving path of the robot (11), control the operation or driving, or check information on surrounding objects.

[0100] <AI+자율주행+XR>

[0101] Autonomous vehicles (12) can be implemented as mobile robots, vehicles, unmanned aerial vehicles, etc. by applying AI technology and XR technology.

[0102] An autonomous vehicle (12) to which XR technology is applied may refer to an autonomous vehicle equipped with a means for providing XR images, an autonomous vehicle that is the subject of control / interaction within an XR image, etc. In particular, an autonomous vehicle (12) that is the subject of control / interaction within an XR image is distinct from an XR device (13) and can be linked with each other.

[0103] An autonomous vehicle (12) equipped with a means for providing XR images can acquire sensor information from sensors including cameras and output XR images generated based on the acquired sensor information. For example, the autonomous vehicle (12) can be equipped with a HUD to output XR images, thereby providing passengers with XR objects corresponding to real objects or objects on the screen.

[0104] At this time, when the XR object is output to the HUD, at least a part of the XR object may be output so as to overlap with an actual object toward which the passenger's gaze is directed. On the other hand, when the XR object is output to a display provided inside the autonomous vehicle (12), at least a part of the XR object may be output so as to overlap with an object on the screen. For example, the autonomous vehicle (12) may output XR objects corresponding to objects such as a road, another vehicle, a traffic light, a traffic sign, a two-wheeled vehicle, a pedestrian, a building, etc.

[0105] When an autonomous vehicle (12) that is the target of control / interaction within an XR image acquires sensor information from sensors including a camera, the autonomous vehicle (12) or the XR device (13) generates an XR image based on the sensor information, and the XR device (13) can output the generated XR image. In addition, the autonomous vehicle (12) can operate based on a control signal input through an external device such as the XR device (13) or a user's interaction.

[0106] [Augmented Reality Technology]

[0107] Extended Reality (XR) is a general term for Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR). VR technology provides real-world objects and backgrounds only as CG images, AR technology provides virtually created CG images on top of images of real objects, and MR technology is a computer graphics technology that provides virtual objects mixed and combined in the real world.

[0108] MR technology is similar to AR in that it presents both real and virtual objects simultaneously. However, while AR uses virtual objects to complement real objects, MR uses virtual and real objects on an equal footing.

[0109] XR technology can be applied to HMD (Head-Mount Display), HUD (Head-Up Display), mobile phones, tablet PCs, laptops, desktops, TVs, digital signage, etc., and devices to which XR technology is applied can be called XR devices.

[0110] Below, an electronic device providing augmented reality according to an embodiment of the present invention will be described. In particular, a projector applicable to augmented reality and an electronic device including the same will be described in detail.

[0111] Figure 2 is a block diagram showing the configuration of an extended reality electronic device (20) according to an embodiment of the present invention.

[0112] Referring to FIG. 2, the extended reality electronic device (20) may include a wireless communication unit (21), an input unit (22), a sensing unit (23), an output unit (24), an interface unit (25), a memory (26), a control unit (27), and a power supply unit (28). The components illustrated in FIG. 2 are not essential for implementing the electronic device (20), and thus, the electronic device (20) described in this specification may have more or fewer components than the components listed above.

[0113] More specifically, among the above components, the wireless communication unit (21) may include one or more modules that enable wireless communication between the electronic device (20) and a wireless communication system, between the electronic device (20) and another electronic device, or between the electronic device (20) and an external server. In addition, the wireless communication unit (21) may include one or more modules that connect the electronic device (20) to one or more networks.

[0114] This wireless communication unit (21) may include at least one of a broadcast reception module, a mobile communication module, a wireless Internet module, a short-range communication module, and a location information module.

[0115] The input unit (22) may include a camera or video input unit for inputting video signals, a microphone or audio input unit for inputting audio signals, and a user input unit (e.g., a touch key, a mechanical key, etc.) for receiving information from a user. Voice data or image data collected from the input unit (22) may be analyzed and processed into a user's control command.

[0116] The sensing unit (23) may include one or more sensors for sensing at least one of information within the electronic device (20), information about the surrounding environment surrounding the electronic device (20), and user information.

[0117] For example, the sensing unit (23) may include at least one of a proximity sensor, an illumination sensor, a touch sensor, an acceleration sensor, a magnetic sensor, a G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared sensor (IR sensor), a fingerprint recognition sensor, an ultrasonic sensor, an optical sensor (e.g., a photographing device), a microphone, a battery gauge, an environmental sensor (e.g., a barometer, a hygrometer, a thermometer, a radiation detection sensor, a heat detection sensor, a gas detection sensor, etc.), and a chemical sensor (e.g., an electronic nose, a healthcare sensor, a biometric recognition sensor, etc.). Meanwhile, the electronic device (20) disclosed in the present specification may utilize information sensed by at least two or more of these sensors in combination.

[0118] The output unit (24) is for generating output related to visual, auditory, or tactile sensations, and may include at least one of a display unit, an audio output unit, a haptic module, and an optical output unit. The display unit may be formed as a touch screen by forming a mutual layer structure with a touch sensor or by forming an integral structure. This touch screen may function as a user input means that provides an input interface between the augmented reality electronic device (20) and the user, and at the same time, may provide an output interface between the augmented reality electronic device (20) and the user.

[0119] The interface unit (25) serves as a passageway for various types of external devices connected to the electronic device (20). Through the interface unit (25), the electronic device (20) can receive virtual reality or augmented reality content from the external device, and can perform mutual interaction by exchanging various input signals, sensing signals, and data.

[0120] For example, the interface unit (25) may include at least one of a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device equipped with an identification module, an audio I / O (Input / Output) port, a video I / O (Input / Output) port, and an earphone port.

[0121] In addition, the memory (26) stores data that supports various functions of the electronic device (20). The memory (26) can store a plurality of application programs (or applications) that run on the electronic device (20), data for the operation of the electronic device (20), and commands. At least some of these application programs can be downloaded from an external server via wireless communication. In addition, at least some of these application programs can exist on the electronic device (20) from the time of shipment for the basic functions of the electronic device (20) (e.g., call receiving and making functions, message receiving and making functions).

[0122] In addition to operations related to the application program, the control unit (27) typically controls the overall operation of the electronic device (20). The control unit (27) can process signals, data, information, etc. input or output through the components discussed above.

[0123] In addition, the control unit (27) can control at least some of the components by driving an application program stored in the memory (26) to provide appropriate information to the user or process a function. Furthermore, the control unit (27) can operate at least two or more of the components included in the electronic device (20) in combination with each other to drive the application program.

[0124] In addition, the control unit (27) can detect the movement of the electronic device (20) or the user by using a gyroscope sensor, gravity sensor, motion sensor, etc. included in the sensing unit (23). Alternatively, the control unit (27) can detect an object approaching the electronic device (20) or the user by using a proximity sensor, a light sensor, a magnetic sensor, an infrared sensor, an ultrasonic sensor, a light sensor, etc. included in the sensing unit (23). In addition, the control unit (27) can also detect the movement of the user by using sensors provided in a controller that operates in conjunction with the electronic device (20).

[0125] Additionally, the control unit (27) can perform operations (or functions) of the electronic device (20) using an application program stored in the memory (26).

[0126] The power supply unit (28) receives external power or internal power under the control of the control unit (27) and supplies power to each component included in the electronic device (20). The power supply unit (28) includes a battery, and the battery may be provided in a built-in or replaceable form.

[0127] At least some of the above components may cooperate with each other to implement the operation, control, or control method of the electronic device according to various embodiments described below. In addition, the operation, control, or control method of the electronic device may be implemented on the electronic device by driving at least one application program stored in the memory (26).

[0128] Hereinafter, an electronic device described as an example of the present invention will be described based on an embodiment applied to an HMD (Head Mounted Display). However, embodiments of the electronic device according to the present invention may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (personal digital assistant), a PMP (portable multimedia player), a navigation device, a slate PC, a tablet PC, an ultrabook, and a wearable device. In addition to an HMD, the wearable device may include a smart watch, a contact lens, VR / AR / MR Glass, and the like.

[0129] FIG. 3 is a perspective view of an augmented reality electronic device according to an embodiment of the present invention.

[0130] As illustrated in FIG. 3, an electronic device according to an embodiment of the present invention may include a frame (100), a projector device (200), and a display unit (300).

[0131] The electronic device may be provided as a glass type (smart glass). The glass type electronic device is configured to be worn on the head of the human body and may include a frame (case, housing, etc.) (100) for this purpose. The frame (100) may be formed of a flexible material to facilitate wearing.

[0132] The frame (100) is supported by the head and provides a space for mounting various components. As illustrated, electronic components such as a projector device (200), a user input unit (130), or an audio output unit (140) may be mounted on the frame (100). In addition, a lens covering at least one of the left and right eyes may be detachably mounted on the frame (100).

[0133] The frame (100) may have a shape of glasses worn on the face of the user's body as shown in the drawing, but is not necessarily limited thereto, and may also have a shape of goggles or the like worn in close contact with the user's face.

[0134] Such a frame (100) may include a front frame (110) having at least one opening, and a pair of side frames (120) extending in the y direction (in FIG. 3) intersecting the front frame (110) and being parallel to each other.

[0135] The frame (100) may have the same or different length (DI) in the x direction and length (LI) in the y direction.

[0136] The project device (200) is provided to control various electronic components provided in an electronic device. The project device (200) may be used interchangeably with 'optical output device', 'optical projector device', 'light irradiation device', 'optical device', etc.

[0137] The projector device (200) can generate an image or a video of a sequence of images that are displayed to the user. The projector device (200) can include an image source panel that generates an image and a plurality of lenses that diffuse and converge light generated from the image source panel.

[0138] The project device (200) may be fixed to one of the two side frames (120). For example, the project device (200) may be fixed to the inside or outside of one of the side frames (120), or may be integrally formed by being built into the inside of one of the side frames (120). Alternatively, the project device (200) may be fixed to the front frame (110) or may be provided separately from the electronic device.

[0139] The display unit (300) may be implemented in the form of a head-mounted display (HMD). The HMD form refers to a display method that is mounted on the head and directly displays an image in front of the user's eyes. When the user wears the electronic device, the display unit (300) may be positioned to correspond to at least one of the left and right eyes so that the image can be directly displayed in front of the user's eyes. In this drawing, the display unit (300) is positioned in a portion corresponding to the right eye so as to output an image toward the user's right eye. However, as described above, the present invention is not limited thereto and may be positioned for both the left and right eyes.

[0140] The display unit (300) can allow the user to visually perceive the external environment while simultaneously displaying images generated by the projector device (200). For example, the display unit (300) can project images onto the display area using a prism.

[0141] The display unit (300) may be formed to be translucent so that the projected image and the general field of view in front (the range that the user sees through his eyes) can be viewed simultaneously. For example, the display unit (300) may be translucent and formed of an optical member including glass.

[0142] And the display unit (300) can be inserted into and fixed to an opening included in the front frame (110), or can be positioned on the back surface of the opening (i.e., between the opening and the user) and fixed to the front frame (110). In the drawing, an example in which the display unit (300) is positioned on the back surface of the opening and fixed to the front frame (110) is shown, but the display unit (300) can be positioned and fixed to various positions of the frame (100).

[0143] As illustrated in FIG. 3, when the electronic device projects image light from the projector device (200) onto one side of the display unit (300), the image light is emitted to the other side through the display unit (300), thereby allowing the user to see the image generated from the projector device (200).

[0144] Accordingly, the user can view the external environment through the opening of the frame (100) and simultaneously view the image generated by the projector device (200). That is, the image output through the display unit (300) can be seen to overlap with the general field of view. By utilizing these display characteristics, electronic devices can provide augmented reality (AR) that superimposes a virtual image on a real image or background and shows it as a single image.

[0145] Furthermore, in addition to these operations, images generated by the external environment and the projector device (200) may be provided to the user with a time difference for a short period of time that is not recognized by the user. For example, within a single frame, the external environment may be provided to the user during one section, and images from the projector device (200) may be provided to the user during another section.

[0146] Alternatively, both overlap and time difference may be provided.

[0147] Figures 4 to 6 are conceptual diagrams for explaining various display methods applicable to a display unit according to an embodiment of the present invention.

[0148] Specifically, FIG. 4 is a drawing for explaining an embodiment of a prism-type optical member, FIG. 5 is a drawing for explaining an embodiment of a waveguide-type optical member, and FIG. 6 is a drawing for explaining an embodiment of a surface reflection-type optical member.

[0149] As illustrated in FIG. 4, a prism-type optical member may be used in the display unit (300-1) according to an embodiment of the present invention.

[0150] As an example, a prism-type optical member may be a flat-type glass optical member in which the surface where image light is incident and the surface (300a) where the image light is emitted are planes, as shown in (a) of FIG. 4, or a freeform glass optical member in which the surface (300b) where the image light is emitted is formed as a curved surface without a constant radius of curvature, as shown in (b) of FIG. 4.

[0151] A flat-type glass optical member can receive image light generated from a projector device (200) through a flat side, reflect the light by a total reflection mirror (300a) provided inside, and emit the light toward the user. Here, the total reflection mirror (300a) provided inside the flat-type glass optical member can be formed inside the flat-type glass optical member by a laser.

[0152] The freeform glass optical member is configured to become thinner as it gets further away from the incident surface, so that the image light generated from the projector device (200) can be incident on the curved side, totally reflected internally, and emitted toward the user.

[0153] As illustrated in FIG. 5, a display unit (300-2) according to another embodiment of the present invention may use a waveguide type optical element or a light guide optical element (LOE).

[0154] Examples of optical elements of the waveguide (or waveguide) or light guide type include a glass optical element of a segmented beam splitter type as illustrated in (a) of FIG. 5, a glass optical element of a sawtooth prism type as illustrated in (b) of FIG. 5, a glass optical element having a diffractive optical element (DOE) as illustrated in (c) of FIG. 5, a glass optical element having a hologram optical element (HOE) as illustrated in (d) of FIG. 5, a glass optical element having a passive grating as illustrated in (e) of FIG. 5, and a glass optical element having an active grating as illustrated in (f) of FIG.

[0155] As shown in (a) of FIG. 5, a glass optical member of a segmented beam splitter type 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 shown.

[0156] Accordingly, the optical image generated in the projector device (200) is totally reflected by the total reflection mirror (301a) inside the glass optical member, and the totally reflected optical image is partially separated and emitted by the partial reflection mirror (301b) while guiding light along the length direction of the glass, so that it can be recognized by the user's eyes.

[0157] As shown in (b) of Fig. 5, the glass optical member of the sawtooth prism type causes the image light of the projector device (200) to be incident diagonally on the side of the glass and is totally reflected inside the glass, and the light image is emitted to the outside of the glass by the sawtooth-shaped protrusions (302) provided on the side from which it is emitted, so that it can be recognized by the user's eyes.

[0158] A glass optical element having a diffractive optical element (DOE) as illustrated in (c) of FIG. 5 may be provided with a first diffractive portion (303a) on the surface on which the light image is incident and a second diffractive portion (303b) on the surface on which the light image is emitted. These first and second diffractive portions (303a, 303b) may be provided in a form in which a specific pattern is patterned on the surface of the glass or in a form in which a separate diffractive film is attached.

[0159] Accordingly, the light image generated from the projector device (200) is diffracted upon entering through the first diffraction section (303a), is totally reflected, and guides light along the length direction of the glass, and is emitted through the second diffraction section (303b), so that it can be recognized by the user's eyes.

[0160] A glass optical element having a hologram optical element (HOE) as illustrated in (d) of FIG. 5 may be provided with an out-coupler (304) inside the glass on the side from which the optical image is emitted. Accordingly, an optical image is incident from a projector device (200) diagonally through the side of the glass, is totally reflected, is guided along the length direction of the glass, and is emitted by the out-coupler (304) so ​​that it can be recognized by the user's eyes. Such a hologram optical element may be further subdivided into a structure having a passive grating and a structure having an active grating by slightly changing the structure.

[0161] A glass optical member having a passive grating, such as that illustrated in (e) of FIG. 5, 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.

[0162] Accordingly, the light image incident on the incident side of the glass surface is totally reflected by the in-coupler (305a) provided on the opposite surface and guided along the length direction of the glass, and is emitted through the opposite surface of the glass by the out-coupler (305b), so that it can be recognized by the user's eyes.

[0163] A glass optical member having an active grating as illustrated in (f) of FIG. 5 may be provided with an in-coupler (306a) formed as an active grating inside the glass on the side where the light image is incident, and an out-coupler (306b) formed as an active grating inside the glass on the side where the light image is emitted.

[0164] Accordingly, the light image incident on the glass is guided along the length direction of the glass while being totally reflected by the in-coupler (306a), and is emitted outside the glass by the out-coupler (306b), so that it can be recognized by the user's eyes.

[0165] According to a modified example, a pin mirror type optical member may be used as the display unit.

[0166] In addition, as shown in (a) of Fig. 6, a freeform combiner type surface reflection type optical member may be formed as a single glass with multiple flat surfaces having different incident angles of light images, so that a freeform combiner glass having an overall curved surface may be used to perform the role of a combiner. Such a freeform combiner glass may be output to the user with the incident angles of light images being different for each area.

[0167] As shown in (b) of FIG. 6, a surface reflection type optical member of the Flat HOE method can be provided by coating or patterning a holographic optical member (HOE, 311) on the surface of a flat glass, and an optical image incident from a projector device (200) can pass through the holographic optical member (311), be reflected from the surface of the glass, and then pass through the holographic optical member (311) again to be emitted toward the user.

[0168] The freeform HOE type surface reflection type optical member as shown in (c) of Fig. 6 can be provided by coating or patterning a holographic optical member (HOE, 313) on the surface of a freeform glass, and the operating principle can be the same as that described in (b) of Fig. 6.

[0169] Fig. 7 is a perspective view of a project device according to an embodiment, Fig. 8 is another perspective view of a project device according to an embodiment, and Fig. 9 is a schematic diagram of the inside of a project device according to an embodiment.

[0170] Referring to FIGS. 7 to 9, a project device (200) according to an embodiment may include a housing (210), a first light source unit (220), a second light source unit (230), a reflector unit (240), and a projection lens unit (250).

[0171] The housing (210) may have a space or housing groove in which each component of the projector device (200) is accommodated or placed. The housing (210) may be located on the outside of the projector device (200). For example, a first light source unit (220), a second light source unit (230), a reflector unit (240), and a projection lens unit (250) may be placed inside the housing (210).

[0172] Additionally, the housing (210) may have an open structure on one side. Accordingly, each of the above-described components may be assembled through the open area or surface. Furthermore, light may be emitted to the outside through the opening of the housing (210).

[0173] The housing (210) may have various shapes. For example, the housing (210) may have a hexahedral structure. Accordingly, the project device according to the embodiment can be easily mounted on an electronic device. Furthermore, the project device according to the embodiment can be easily miniaturized or compacted.

[0174] The first light source unit (220) and the second light source unit (230) can emit light. The first light source unit (220) and the second light source unit (230) can include a plurality of light sources that emit light. The first light source unit (220) and the second light source unit (230) can emit light of a specific wavelength band. The first light source unit (220) and the second light source unit (230) can emit light of a red, green, or blue wavelength band. For example, the first light source unit (220) can emit light of a green and blue wavelength band, and the second light source unit (230) can emit light of a red wavelength band. The first light source unit (220) can emit light in a first direction. Additionally, the second light source unit (230) can emit light in a second direction. The direction in which the second light source unit (230) emits light may be perpendicular to the direction in which the first light source unit (220) emits light. The light emitted from the first light source unit (220) may pass through the reflector unit (240) and reach the projection lens unit (250). The light emitted from the second light source unit (230) may be reflected by the reflector unit (240) and reach the projection lens unit (250). The projector device may be manufactured in a simple process and have a small volume because it includes only two light sources. In addition, since only the lights of the two panels need to be aligned, the tolerance may be reduced.

[0175] In addition, in the project device according to the embodiment, the first direction may correspond to the 'X-axis direction' in the drawing. The first direction may correspond to the direction from the first light source unit (220) toward the reflector unit (240). Furthermore, the second direction may correspond to the Y-axis direction in the drawing. The second direction may be a direction perpendicular to the first direction. In addition, the third direction may be a direction perpendicular to the first direction and the second direction.

[0176] The first light source unit (220) and the second light source unit (230) may be disposed inside the housing (210). The first light source unit (220) and the second light source unit (230) may emit light toward the reflector unit (240). The first light source unit (220) and the second light source unit (230) may be disposed spaced apart from the reflector unit (240). In addition, the first light source unit (220) and the second light source unit (230) may emit light toward the projection lens unit (250). The first light source unit (220) and the second light source unit (230) may be disposed spaced apart from the projection lens unit (250). The light emitted from the first light source unit (220) and the second light source unit (230) can be reflected by the reflector unit (240) and reach the projection lens unit (250). The first light source unit (220) can emit light in a first direction. The first light source unit (220) can be arranged to be spaced apart from the reflector unit (240) in the first direction. In addition, the second light source unit (230) can emit light in a second direction. The second light source unit (230) can be arranged to be spaced apart from the reflector unit (240) in the second direction.

[0177] The first light source unit (220) may include a first light source (221) and a second light source (222) that emit light of different wavelength bands, and a first substrate (223) on which the first light source (221) and the second light source (222) are disposed. The first light source (221) and the second light source (222) may emit light of different wavelength bands. The first light source (221) may emit first light. The second light source (222) may emit second light of a different wavelength band from the first light. For example, the first light may be light of a blue wavelength band, and the second light may be light of a green wavelength band. The first light source (221) and the second light source (222) may be disposed on the first substrate (223). The first substrate (223) can be connected to the first light source (221) and the second light source (222) to transmit electrical energy so that the first light source (221) and the second light source (222) can emit light. The first substrate (223) can be arranged perpendicular to the first direction. The first light source (221) and the second light source (222) can be arranged to overlap the reflector (240) in the first direction. Since one light source can emit light of two wavelength bands, the manufacturing process can be simplified and the volume of the projector can be reduced. In addition, since only the lights of the two panels need to be aligned, the tolerance can be reduced.

[0178] The first light source (221) and the second light source (222) may be arranged in plurality. The plurality of first light sources (221) and the plurality of second light sources (222) may be arranged spaced apart from each other on the first substrate (223), respectively. The plurality of first light sources (221) and the plurality of second light sources (222) may be arranged spaced apart from each other at a predetermined interval in the second direction or the third direction, respectively, on the first substrate (223). The plurality of first light sources (221) may overlap each other in the second direction or the third direction. In addition, the plurality of second light sources (222) may overlap each other in the second direction or the third direction. By spacing the plurality of light sources in a direction perpendicular to the optical axis, the PPI performance of the projector device can be maintained.

[0179] The second light source (222) may be arranged to overlap with the first light source (221) in the first direction. The second light source (222) may be arranged to overlap with all or part of the plurality of first light sources (221) in the first direction. The second light source (222) may be arranged closer to the first substrate (223) than the first light source (221) or spaced apart from the first substrate (223). The second light source (222) and the first light source (221) may not overlap in the second direction or the third direction. The optical axis of the first light source (221) and the optical axis of the second light source (222) may be arranged to overlap with each other. The second light source (222) and part of the first light source (221) overlap in the optical axis direction, so that light of different wavelengths can be clearly distinguished and emitted from one light source unit depending on the area.

[0180] The second light source (222) may be placed on the first light source (221). The second light source (222) may be in contact with the first light source (221) on the first light source (221). The first light source (221) may be placed between the first substrate (223) and the second light source (222). The second light source (222) may be positioned closer to the reflector (240) than the first light source (221). In addition, when the second light source (222) is placed on the first light source (221), the second light, not the first light, may be emitted from the corresponding area. Accordingly, light of different wavelengths may be clearly distinguished and emitted depending on the area of ​​the light source. The second light source (222) may absorb the first light emitted by the first light source (221).

[0181] The distance between the plurality of first light sources (221) in the second direction may be twice the distance between the plurality of second light sources (222) in the second direction. The second light source (222) may overlap a portion of the first light source (221) in the first direction. A first light source (221) adjacent to a first light source (221) that overlaps the second light source (222) may not overlap the second light source (222). Therefore, the first light source (221) that overlaps the second light source (222) and the first light source (221) that does not overlap the second light source (222) may be arranged alternately. Since the distance between the second light sources (222) is greater, the second light and the first light can be alternately emitted from the first light source (221) that does not overlap with the second light source (222) and the first light source (221) that overlaps with the second light source (222). Accordingly, the first light source unit (220) can include a first region where the first light source (221) and the second light source (222) overlap and a second region where the first light source (221) and the second light source (222) do not overlap. The first region and the second region can be arranged alternately. The first region and the second region can be arranged in the second direction or the third direction. Light of different wavelengths can be emitted from the first region and the second region, so that light of two wavelengths can be emitted from one panel. In this case, in the first region of the first light source unit (220), light in the green wavelength band emitted by the second light source (222) can be emitted, and in the second region, light in the blue wavelength band emitted by the first light source (221) can be emitted.

[0182] The second light source unit (230) may include a plurality of third light sources (231) that emit light of a different wavelength band from the first light source (221) and the second light source (222), and a second substrate (232) on which the third light sources (231) are arranged. The third light sources (231) may emit light of a different wavelength band from the first light source (221) and the second light source (222). The third light source (231) may emit the third light. For example, the third light may be light of a red wavelength band. The third light source (231) may be arranged on the second substrate (232). The second substrate (232) may be connected to the third light sources (231) and transmit electrical energy so that the third light sources (231) may emit light. The second substrate (232) may be arranged perpendicular to the first substrate (223). The second substrate (232) may be arranged perpendicular to the second direction. A plurality of third light sources (231) may be arranged. The plurality of third light sources (231) may be arranged spaced apart from each other on the second substrate (232), respectively. The plurality of third light sources (231) may be arranged spaced apart from each other at a predetermined interval in the first direction or the third direction, respectively, on the second substrate (232). The plurality of third light sources (231) may overlap each other in the second direction or the third direction. By spacing the plurality of light sources in a direction perpendicular to the optical axis, the PPI performance of the projector device can be maintained.

[0183] The diameters of the first to third light sources (221, 222, 231) may be 3 μm to 4 μm. By forming the diameters of the first to third light sources (221, 222, 231) to be 3 μm to 4 μm, the PPI can be maintained at approximately 5000 ppi.

[0184] The reflector (240) can transmit light emitted from the first light source (220) and reflect light emitted from the second light source (230). The reflector (240) can be arranged between the light source and the projection lens (250). The reflector (240) can allow light emitted from the light source to reach the projection lens (250). The reflector (240) can be spaced apart from the first light source (220) or the projection lens (250) in a first direction. The reflector (240) can be spaced apart from the second light source (230) in a second direction. The reflector (240) can transmit or reflect light depending on the wavelength band of the light passing through it. The reflector (240) can transmit light emitted from the first light source (220). The reflector (240) can transmit the first light and the second light emitted from the first light source (220). For example, the reflector (240) can transmit light in the blue and green wavelength bands. In addition, the reflector (240) can reflect light emitted from the second light source (230). The reflector (240) can reflect the third light emitted from the second light source (230). For example, the reflector (240) can reflect light in the red wavelength band. The reflector (240) can form an angle of 45° with the first direction and the second direction. The reflector (240) can reflect the third light emitted from the second light source (230) in the first direction by having an angle of 45° with the second direction. The first, second, and third lights can pass through the reflector (240) and reach the projection lens (250). The reflector (240) can include a dichroic mirror. By including the reflector, the projector device can eliminate the X-cube, thereby reducing its volume and enhancing its optical properties.

[0185] The projection lens unit (250) may be arranged at the rear end of the reflection unit (240). Light that passes through the reflection unit (240) or is reflected by the reflection unit (240) may be projected onto the projection lens unit (250). The projection lens unit (250) may project light emitted from the projector onto a screen or waveguide (or display unit). The projection lens unit (250) may be arranged spaced apart from the reflection unit (240) in a first direction. The projection lens unit (250) may partially overlap with the reflection unit (240) or the first light source unit (220) in the first direction. The first light, the second light, and the third light emitted from each light source may be overlapped into one unit cell after passing through the projection lens unit (250). Therefore, the first light, the second light, and the third light can form a plurality of unit cells after transmitting through the projection lens unit (250). Each of the plurality of unit cells can have light of each wavelength band superimposed. In an embodiment, the projection lens unit (250) can adjust the size of the image so that the light is incident within an effective aperture diameter (enterance pupil diameter, EPD) of a waveguide or the like. To this end, the projection lens unit (250) according to the embodiment can include a lens barrel (not shown) and a plurality of lenses (or optical systems) (not shown) arranged within the lens barrel.

[0186] Figure 10 is a schematic diagram of the inside of a project device according to another embodiment.

[0187] Referring to FIG. 10, a first light source unit (220) of a projector device according to an embodiment may include a support layer (224) disposed on a first substrate (223). The support layer (224) may be disposed on the first substrate (223). The support layer (224) may support a light source. The support layer (224) may support a plurality of light sources and space a certain distance between the light sources. The support layer (224) may be located on a surface of the first substrate (223) disposed in a direction in which light is emitted. The support layer (224) may include a groove on a surface facing the first substrate (223). A second light source (222) may be disposed in the groove. The support layer (224) may include a transparent and electrically insulating material. By including a support layer, the first light and the second light can be emitted in an overlapping state, and accordingly, the size of the unit cell becomes the size of each subpixel, so that PPI can be maintained.

[0188] The support layer (224) may use a polymer-based or oxide-based material. For example, the polymer-based material may include polycarbonate, polyamide, polymethyl methacrylate, polyethylene, polyethylene terephthalate, polyethylene terephthalate glycol-modified, polyvinyl chloride, polypropylene, and fluorinated ethylene propylene. In addition, for example, the oxide-based material may include Al2O3, Cu2O, GeO2, HfO2, MgO, MoO3, Nb2O5, Sc2O3, SiO, SiO2, Ta2O5, TeO2, TiO2, VO2, WO3, and ZrO2. In addition, the width of the support layer (224) in the first direction may be 1 μm to 10 μm. The support layer (224) has a thickness sufficient to passivate the second light source (222), and may have a flat upper surface to support the first light source (221). If the width of the support layer (224) in the first direction is greater than 10 μm, the second light may be absorbed, and the distance between the first light source (221) and the second light source (222) may increase, making optical system design difficult.

[0189] The first light source (221) may be disposed on the support layer (224), and the second light source (222) may be disposed between the first substrate (223) and the support layer (224). The first light source (221) may be disposed on the upper surface of the support layer (224). The first light source (221) may be positioned in the direction in which light of the support layer (224) is emitted. The first light source (221) may be positioned at a predetermined distance from the first substrate (223) by the support layer (224). A plurality of first light sources (221) may be disposed at a predetermined distance from each other in the second direction or the third direction on the support layer (224). The second light source (222) may be disposed on the first substrate (223) and positioned at the lower end of the support layer (224). The second light source (222) may be arranged in the groove of the support layer (224). The second light source (222) may be arranged to overlap the support layer (224). The second light source (222) may be arranged to be positioned in the groove of the support layer (224) and overlap the support layer (224) in the second direction or the third direction. The plurality of second light sources (222) may be arranged on the first substrate (223) to be spaced apart from each other by a certain distance in the second direction or the third direction. In this case, all of the plurality of second light sources (222) may overlap with the plurality of first light sources (221) in the first direction. The separation distance in the second direction between adjacent second light sources (222) may be the same as the separation distance in the second direction between adjacent first light sources (221). The separation distance in the second direction between the plurality of first light sources (221) may be 0.8 μm to 1.2 μm.

[0190] A plurality of first light sources (221) and a plurality of second light sources (222) may be spaced apart from each other by a certain distance in a first direction. The first light sources (221) and the second light sources (222) may be arranged to overlap in the first direction. The first light source (221) may be arranged on an optical path through which the second light source (222) emits the second light. The optical axes of the plurality of first light sources (221) may coincide with the optical axes of the second light sources (222) that overlap with each of the plurality of first light sources (221) in the first direction. The width of the second light sources (222) in the second direction may be equal to or greater than the width of the first light sources in the second direction. If the width of the second light sources (222) in the second direction is greater, some of the second light sources (222) may not overlap with the first light sources (221) in the first direction. Since the width of the second light source is larger, the second light emitted from the second light source can be emitted even if it is blocked by the first light source portion. Accordingly, light of all wavelength bands can be emitted from a single unit cell while maintaining the size of each unit cell to the size of each pixel. The width of the second light source (222) in the second direction may be less than twice the width of the first light source (221) in the second direction.

[0191] Fig. 11 is a drawing showing a method for manufacturing a first light source unit of a project device according to an embodiment.

[0192] First, referring to FIGS. 11a and 11b, a first wafer (W1) may be deposited on a first substrate (223). The first wafer (W1) may be a blue epitaxial wafer. Referring to FIG. 11c, a plurality of first light sources (221) may be patterned on the first wafer (W1). The first light sources (221) may be blue μLEDs. And referring to FIG. 11d, a green QD (Quantum Dot) may be patterned on some of the first light sources (221) among the plurality of first light sources (221). By patterning the green QD on the first light sources (221), a green / blue μLED may be formed.

[0193] Fig. 12 is a drawing showing a method for manufacturing a first light source unit of a project device according to another embodiment.

[0194] First, referring to FIGS. 12a and 12b, a second wafer (W2) can be deposited on a first substrate (223). The second wafer (W2) may be a green epitaxial wafer. Referring to FIG. 12c, a plurality of second light sources (222) can be patterned on the second wafer (W2). The second light sources (222) may be green μLEDs. Referring to FIG. 12d, a support layer (224) can be laminated and planarized on the first substrate (223) and the second light sources (222). In addition, an addressing line can be patterned so that the first light source (221) can be electrically driven. Referring to FIG. 12e, a first wafer (W1) can be deposited on the first substrate (223). The first wafer (W1) may be a blue epitaxial wafer. And referring to FIG. 12f, a plurality of first light sources (221) can be patterned on the first wafer (W1). The first light source (221) can be a blue μLED.

[0195] Although the above description focuses on examples, these are merely examples and are not intended to limit the examples. Those skilled in the art will appreciate that various modifications and applications not exemplified above are possible without departing from the essential characteristics of the present examples. For example, each component specifically shown in the examples can be modified and implemented. In addition, differences related to such modifications and applications should be interpreted as being included within the scope of the embodiments set forth in the appended claims.

Claims

1. A first light source unit that emits light in a first direction; A second light source unit that emits light in a second direction perpendicular to the first direction; and It includes a reflector that transmits light emitted from the first light source and reflects light emitted from the second light source, The first light source unit includes a plurality of first light sources and second light sources that emit light of different wavelength bands, and a first substrate on which the first light sources and the second light sources are arranged. A projector device in which the second light source is arranged to overlap some of the plurality of first light sources in a first direction perpendicular to the first substrate.

2. In paragraph 1, A projector device in which the plurality of first light sources are arranged on the first substrate at a predetermined distance from each other in the second direction.

3. In paragraph 2, The second light source is placed on the first light source, A projector device wherein the distance between the plurality of second light sources in the second direction is greater than the distance between the plurality of first light sources in the second direction.

4. In paragraph 1, The above first light source emits light in the blue wavelength band, The above second light source is a projector device that emits light in the green wavelength band.

5. In paragraph 4, A project device wherein the first light source unit includes a first region where the first light source and the second light source overlap and a second region where the first light source and the second light source do not overlap.

6. In paragraph 5, In the first region of the first light source unit, light of a green wavelength band is emitted, In the second region, a projector device that emits light in the blue wavelength band.

7. In paragraph 1, Includes a projection lens section, The above reflector is a projector device that reflects light emitted by the second light source unit to the projection lens unit.

8. In paragraph 5, A project device in which the optical axes of the first light source and the second light source in the first region are the same.

9. In paragraph 1, The first light source unit includes a support layer disposed on the first substrate, The first light source is disposed on the support layer, A projector device wherein the second light source is disposed between the first substrate and the support layer.

10. In paragraph 9, The above support layer includes a groove on a surface facing the first substrate, A project device in which the second light source is placed in the groove of the support layer.

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