Wearable electronic device comprising display engine

Abstract

A wearable electronic device according to one embodiment of the present disclosure comprises a display engine connected to at least one of a lens frame accommodating a transparent member or a wearing member connected to the lens frame, and configured to emit visual information projected onto the transparent member, wherein the display engine includes: a projection system including a plurality of projection system lenses and an image generation unit disposed on a second direction side of the plurality of projection system lenses and configured to receive light and generate visual information; an illumination system disposed to intersect the projection system and configured to provide light to the projection system; and a light path separation member disposed between any two lenses among the plurality of projection system lenses in an intersection region of the projection system and the illumination system, and configured to direct a path of light provided from the illumination system into the projection system.

Description

Wearable electronic device including a display engine

[0001] The embodiments of the present disclosure relate to wearable electronic devices, for example, wearable electronic devices including a display engine.

[0002] With the development of electronic, information, and communication technologies, various functions are being integrated into a single electronic device. For example, an electronic device (e.g., a smartphone) includes communication functions as well as functions such as an audio player, an imaging device, or an electronic notebook, and even more diverse functions can be implemented on the smartphone through the additional installation of applications. In addition to executing installed applications or stored functions, the electronic device can receive various information in real time by connecting to a server or other electronic device via wired or wireless means.

[0003] As the use of electronic devices becomes commonplace, user demand for the portability and usability of such devices may increase. In response to these user demands, wearable electronic devices (hereinafter referred to as "wearable electronic devices") that can be carried and used while worn on the body, similar to wristwatches or glasses, have reached commercialization. Among wearable electronic devices, those that can be worn on the face can be effectively utilized for implementing virtual reality or augmented reality. For example, wearable electronic devices can implement virtual reality by providing three-dimensional images of a virtual space within a game enjoyed on a television or computer monitor, while blocking images of the actual space where the user is located. Another type of wearable electronic device can implement augmented reality by providing an environment where the user can visually perceive actual images of the space they are in, while simultaneously displaying virtual images to provide the user with various visual information. The ‘actual image of the space’ may include, for example, an image captured by a camera or an image transmitted through see-through optics. The ‘virtual image’ may include information about the space where the user is staying, and / or information about various objects within the space.

[0004] The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art in relation to the present disclosure.

[0005] A wearable electronic device according to one embodiment of the present disclosure may include a lens frame configured to accommodate a transparent member.

[0006] A wearable electronic device according to one embodiment of the present disclosure may include a wearable member connected to the lens frame.

[0007] A wearable electronic device according to one embodiment of the present disclosure may include a display engine connected to at least one of the lens frame or the wearable member and configured to emit visual information projected onto the transparent member.

[0008] The display engine of a wearable electronic device according to one embodiment of the present disclosure may include a projection system comprising a plurality of projection system lenses arranged in a second direction opposite to a first direction in which the visual information is emitted, and an image generation unit disposed on the second direction side of the plurality of projection system lenses and configured to receive light and generate the visual information.

[0009] The display engine of a wearable electronic device according to one embodiment of the present disclosure may include a lighting system arranged to intersect with the projection system and configured to provide the light to the projection system.

[0010] The display engine of a wearable electronic device according to one embodiment of the present disclosure may include a light path separator member disposed between any two of the plurality of projection system lenses in the intersection area of ​​the projection system and the illumination system, and configured to allow the path of the light provided from the illumination system to enter the projection system.

[0011] Among the plurality of projection system lenses of a wearable electronic device according to one embodiment of the present disclosure, the lens closest to the image generating unit may have a negative refractive index and be composed of an aspherical lens.

[0012] A lens positioned adjacent to the first direction side of the lens closest to the image generating unit among the plurality of projection system lenses of a wearable electronic device according to one embodiment of the present disclosure may have a defined refractive index.

[0013] The projection system of a wearable electronic device according to one embodiment of the present disclosure can satisfy the following [Equation 1].

[0014] [Equation 1]

[0015] Fno < 2.1

[0016] (Here, Fno in [Equation 1] is the F-number of the projection system)

[0017] The projection system of a wearable electronic device according to one embodiment of the present disclosure can satisfy the following [Equation 2].

[0018] [Equation 2]

[0019] FOV < 40 deg.

[0020] (Here, the FOV in [Equation 2] above is the field of view of the display engine)

[0021] The projection system of a wearable electronic device according to one embodiment of the present disclosure can satisfy the following [Equation 3].

[0022] [Equation 3]

[0023] CRA < 15 deg.

[0024] (Here, CRA in [Equation 3] is the angle of the principal ray incident from the image generation unit to the plurality of projection system lenses.)

[0025] A wearable electronic device according to one embodiment of the present disclosure may include a lens frame configured to accommodate a transparent member.

[0026] A wearable electronic device according to one embodiment of the present disclosure may include a wearable member connected to the lens frame.

[0027] A wearable electronic device according to one embodiment of the present disclosure may include a display engine connected to at least one of the lens frame or the wearable member and configured to emit visual information projected onto the transparent member.

[0028] The display engine of a wearable electronic device according to one embodiment of the present disclosure may include a projection system comprising a plurality of projection system lenses arranged in a second direction opposite to a first direction in which the visual information is emitted, and an image generation unit disposed on the second direction side of the plurality of projection system lenses and configured to receive light and generate the visual information.

[0029] The display engine of a wearable electronic device according to one embodiment of the present disclosure may include a lighting system arranged to intersect with the projection system and configured to provide the light to the projection system.

[0030] The display engine of a wearable electronic device according to one embodiment of the present disclosure may include a light path separator member disposed between a first projection lens disposed at the first direction side end of the plurality of projection lenses and a second projection lens disposed at the second direction side of the first projection lens in the intersection area of ​​the projection system and the illumination system, and configured to allow the path of light provided from the illumination system to enter the projection system.

[0031] The projection system of a wearable electronic device according to one embodiment of the present disclosure can satisfy the following [Equation 1].

[0032] [Equation 1]

[0033] Fno < 2.1

[0034] (Here, Fno in [Equation 1] is the F-number of the projection system)

[0035] The projection system of a wearable electronic device according to one embodiment of the present disclosure can satisfy the following [Equation 2].

[0036] [Equation 2]

[0037] FOV < 40 deg.

[0038] (Here, the FOV of [Equation 2] above is the field of view of the entire optical system including the display engine)

[0039] The projection system of a wearable electronic device according to one embodiment of the present disclosure can satisfy the following [Equation 3].

[0040] [Equation 3]

[0041] CRA < 15 deg.

[0042] (Here, CRA in [Equation 3] is the angle of the principal ray incident from the image generation unit to the projection system.)

[0043] The aspects, configurations, and / or advantages described above regarding various embodiments of the present disclosure may become more apparent from the following detailed description with reference to the accompanying drawings.

[0044] FIG. 1 is a block diagram showing an electronic device in a network environment according to one embodiment of the present disclosure.

[0045] FIG. 2 is a schematic diagram illustrating the usage state of an augmented reality device according to one embodiment of the present disclosure.

[0046] FIG. 3 is a schematic diagram illustrating a visual image provided to a user according to one embodiment of the present disclosure.

[0047] FIG. 4 is a perspective view of a wearable electronic device according to one embodiment of the present disclosure.

[0048] FIG. 5 is a combined perspective view for explaining the internal configuration of a wearable electronic device according to one embodiment of the present disclosure.

[0049] FIG. 6 is an exploded perspective view of a wearable electronic device according to one embodiment of the present disclosure.

[0050] FIG. 7 is a perspective view of a wearable electronic device according to one embodiment of the present disclosure.

[0051] FIG. 8 is a cross-sectional view of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0052] FIG. 9 illustrates a cross-sectional view and an optical path of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0053] FIG. 10 is a graph showing spherical aberration of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0054] FIG. 11 is a graph showing the non-point difference of some components of a wearable electronic device according to one embodiment of the present disclosure.

[0055] FIG. 12 is a graph showing distortion aberration of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0056] FIG. 13 illustrates a cross-sectional view and an optical path of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0057] FIG. 14 is a graph showing spherical aberration of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0058] FIG. 15 is a graph showing the non-point difference of some components of a wearable electronic device according to one embodiment of the present disclosure.

[0059] FIG. 16 is a graph showing distortion aberration of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0060] FIG. 17 illustrates a cross-sectional view and an optical path of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0061] FIG. 18 is a graph showing spherical aberration of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0062] FIG. 19 is a graph showing the non-point difference of some components of a wearable electronic device according to one embodiment of the present disclosure.

[0063] FIG. 20 is a graph showing distortion aberration of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0064] FIG. 21 illustrates a cross-sectional view and an optical path of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0065] FIG. 22 is a graph showing spherical aberration of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0066] FIG. 23 is a graph showing the non-point difference of some components of a wearable electronic device according to one embodiment of the present disclosure.

[0067] 24 is a graph showing the distortion aberration of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0068] FIG. 25 illustrates a cross-sectional view and an optical path of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0069] FIG. 26 illustrates a cross-sectional view and an optical path of a part of an electronic device according to one embodiment of the present disclosure.

[0070] Throughout the attached drawings, similar parts, configurations, and / or structures may be assigned similar reference numbers.

[0071] The following description relating to the attached drawings may provide an understanding of various exemplary embodiments of the present disclosure, including the claims and their corresponding contents. While the exemplary embodiments disclosed in the following description include various specific details to aid understanding, they are to be considered as one of various exemplary embodiments. Accordingly, those skilled in the art will understand that various changes and modifications to the various embodiments described in the present disclosure may be made without departing from the scope and technical spirit of the disclosure. Additionally, for clarity and brevity, descriptions of well-known functions and configurations may be omitted.

[0072] The terms and words used in the following description and claims are not limited to their literal meanings but may be used to clearly and consistently describe an embodiment of the present disclosure. Accordingly, it will be apparent to a person skilled in the art that the following description of various embodiments of the disclosure is provided for illustrative purposes, not for the purpose of limiting the scope of the rights or the disclosure defined as equivalent thereto.

[0073] Unless the context clearly indicates otherwise, it should be understood that the singular forms of "a," "an," and "the" include a plural meaning. Thus, for example, "component surface" can be understood to include one or more of the component surfaces.

[0074] FIG. 1 is a block diagram of an electronic device (101) in a network environment (100) according to one embodiment of the present disclosure.

[0075] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) through a first network (198) (e.g., a short-range wireless communication network) or with at least one of an electronic device (104) or a server (108) through a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) through a server (108). According to one embodiment, the electronic device (101) may include a processor (120), memory (130), input module (150), sound output module (155), display module (160), audio module (170), sensor module (176), interface (177), connection terminal (178), haptic module (179), camera module (180), power management module (188), battery (189), communication module (190), subscriber identification module (196), or antenna module (197). In some embodiments, at least one of these components (e.g., connection terminal (178)) may be omitted from the electronic device (101), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (176), camera module (180), or antenna module (197)) may be integrated into a single component (e.g., display module (160)).

[0076] The processor (120) can control at least one other component (e.g., hardware or software component) of the electronic device (101) connected to the processor (120) by executing software (e.g., program (140)), for example, and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (120) can store commands or data received from other components (e.g., sensor module (176) or communication module (190)) in volatile memory (132), process the commands or data stored in volatile memory (132), and store the resulting data in non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., central processing unit or application processor) or an auxiliary processor (123) that can operate independently or together with it (e.g., graphics processing unit, neural processing unit (NPU), image signal processor, sensor hub processor, or communication processor). For example, if the electronic device (101) includes a main processor (121) and an auxiliary processor (123), the auxiliary processor (123) may be configured to use lower power than the main processor (121) or to be specialized for a designated function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as part thereof.

[0077] The auxiliary processor (123) may control at least some of the functions or states associated with at least one component of the electronic device (101) (e.g., display module (160), sensor module (176), or communication module (190)) on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. According to one embodiment, the auxiliary processor (123) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (180) or communication module (190)). According to one embodiment, the auxiliary processor (123) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or through a separate server (e.g., server (108)). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model may include a plurality of artificial neural network layers.An artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0078] The memory (130) can store various data used by at least one component of the electronic device (101) (e.g., processor (120) or sensor module (176)). The data may include, for example, input data or output data for software (e.g., program (140)) and related commands. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0079] The program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0080] The input module (150) can receive commands or data to be used for a component of the electronic device (101) (e.g., processor (120)) from outside the electronic device (101) (e.g., user). The input module (150) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0081] The sound output module (155) can output a sound signal to the outside of the electronic device (101). The sound output module (155) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0082] The display module (160) can visually provide information to an external (e.g., user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling said device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of the force generated by said touch.

[0083] The audio module (170) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150) or output sound through the sound output module (155) or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphones) connected directly or wirelessly to the electronic device (101).

[0084] The sensor module (176) can detect the operating state of the electronic device (101) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (176) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0085] The interface (177) may support one or more specified protocols that can be used for the electronic device (101) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (102)). According to one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0086] The connection terminal (178) may include a connector through which the electronic device (101) can be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0087] The haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (179) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0088] The camera module (180) can capture still images and video. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0089] The power management module (188) can manage the power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least part of a power management integrated circuit (PMIC).

[0090] The battery (189) can supply power to at least one component of the electronic device (101). According to one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0091] The communication module (190) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may include one or more communication processors that operate independently of the processor (120) (e.g., application processor) and support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., cellular communication module, short-range wireless communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (104) through a first network (198) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (199) (e.g., a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (196).

[0092] The wireless communication module (192) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The wireless communication module (192) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (192) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), full-dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large-scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), external electronic device (e.g., electronic device (104)), or network system (e.g., second network (199)). According to one embodiment, the wireless communication module (192) can support a Peak data rate (e.g., 20 Gbps or more) for realizing eMBB, loss coverage (e.g., 164 dB or less) for realizing mMTC, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for realizing URLLC.

[0093] An antenna module (197) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module (197) may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as a first network (198) or a second network (199), may be selected from the plurality of antennas, for example, by a communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (197).

[0094] According to various embodiments, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0095] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0096] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) through a server (108) connected to a second network (199). Each of the external electronic devices (102, or 104) may be the same or different type of device as the electronic device (101). According to one embodiment, all or part of the operations performed on the electronic device (101) may be performed on one or more of the external electronic devices (102, 104, or 108). For example, if the electronic device (101) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (101) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (101) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In one embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (104) or the server (108) may be included within the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0097] The electronic device according to the various embodiments of the present disclosure may be of various forms. The electronic device may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a consumer electronics device. The electronic device according to the embodiments of the present disclosure is not limited to the devices described above.

[0098] The various embodiments of the present disclosure and the terms used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of said items unless the relevant context clearly indicates otherwise. In the present disclosure, phrases such as “A or B,” “at least one of A and B,” “at least one of A or B,” “A, B or C,” “at least one of A, B and C,” and “at least one of A, B, or C” each may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as “first,” “second,” or “first” or “second” may be used simply to distinguish said components from other said components and do not limit said components in any other aspect (e.g., importance or order). Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0099] The term “module” as used in various embodiments of the present disclosure may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0100] Various embodiments of the present disclosure may be implemented as software (e.g., program (140)) comprising one or more instructions stored in a storage medium (e.g., internal memory (136) or external memory (138)) readable by a machine (e.g., electronic device (101)). For example, a processor (e.g., processor (120)) of the machine (e.g., electronic device (101)) may call at least one of the one or more instructions stored in the storage medium and execute it. This enables the machine to be operated to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily.

[0101] According to one embodiment, the method according to various embodiments of the present disclosure may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0102] According to various embodiments, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to various embodiments, one or more of the components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to various embodiments, operations performed by the module, program, or other components may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0103] FIG. 2 is a schematic diagram illustrating the usage state of an augmented reality device according to one embodiment of the present disclosure. FIG. 3 is a schematic diagram illustrating a visual image provided to a user according to one embodiment of the present disclosure.

[0104] The components described with reference to FIGS. 2 and FIGS. 3 may be some or all identical to the components described with reference to FIGS. 1.

[0105] Referring to FIGS. 2 and 3, the wearable electronic device (101) may be a glasses-type device configured to be worn by a user. The wearable electronic device (101) is not limited thereto and may be provided as various types of devices that are wearable by a user and capable of providing augmented reality to the user.

[0106] According to one embodiment, the wearable electronic device (101) may include a light output module (1011) for generating a virtual image formed by light generated from a light source.

[0107] According to one embodiment, a wearable electronic device (101) may include a wave guide (1012) (image combiner) configured to guide a virtual image generated by a light output module (1011) to the user's eye (10). The wave guide (1012) may be formed of a material that allows a visible light band to pass through so that a scene of the real world can be seen together with the virtual image, but is not limited thereto.

[0108] According to one embodiment, the light output module (1011) may be configured to generate light of a virtual image. The light output module (1011) may be a projector including an image panel, an illumination optical system, or a projection optical system. For example, the light output module (1011) may be a device that emits light for outputting a virtual object at a predetermined viewing angle. For example, the light output module (1011) may be a projector that projects light generated by an image panel or a projector that scans modulated light, but is not limited thereto.

[0109] According to one embodiment, the light output module (1011) may include a light output module engine for the left eye and a light output module engine for the right eye, respectively, corresponding to the user's left eye and right eye, but is not limited thereto. For example, the light output module (1011) may include at least one of a light output module engine for the left eye or a light output module engine for the right eye. The light output module (1011) may be placed and / or positioned on the temple of the glasses of the wearable electronic device (101), but is not limited thereto.

[0110] According to one embodiment, the light output module (1011) may be a device in which an image-video generating device that generates visual content such as images and videos and a lighting source that generates light are used together.

[0111] According to one embodiment, the light output module (1011) may be configured to output polarized light or unpolarized light according to the method of an image panel or lighting optical system in order to generate visual content such as images and videos. The light output module (1011) may include, but is not limited to, an LCoS (Liquid Crystal on Silicon) panel, an LEDoS (LED on Silicon) panel, a DMD (Digital Micromirror Device) panel, or a laser scanner.

[0112] According to one embodiment, the light output module (1011) may use an LED light source to generate light. For example, a Red, Green, or Blue LED, or a Laser and White LED may be used as the LED light source. Although the use of an LED light source is described as an example in the present disclosure and the embodiments below, it is not limited thereto.

[0113] For example, the light output module (1011) may further include a temperature sensor for sensing the ambient temperature inside. For example, if the temperature sensor detects a change in the temperature around the light output module (1011), the wearable electronic device (101) may provide compensation for the change in the wavelength of light output from the light output module (1011).

[0114] According to one embodiment, light output from a light output module (1011) may be configured to be incident on one surface of a wave guide (1012). The light output module (1011) may be disposed on or coupled to one surface of the wave guide (1012). According to an embodiment, a filter (not shown) that passes only the wavelength band and / or polarization of the light output from the light output module (1011) may be disposed between the light output module (1011) and one surface of the wave guide (1012).

[0115] According to one embodiment, the wave guide (1012) may receive light of a virtual image output from a light output module engine. The light input to the wave guide (1012) may be reflected (e.g., total internal reflection) and / or diffracted (e.g., DOE (diffractive optical element), HOE (holographic optical element)) at or within the wave guide (1012) and output to the user's eye (10).

[0116] According to one embodiment, the wave guide (1012) is an optical component that receives an image and / or video generated by a light output module (1011) and transmits it to the eye, and may be made of glass or plastic material.

[0117] According to one embodiment, the scene (20) seen by the eyes (10) of a user wearing a wearable electronic device (101) may include a real object (21) and a virtual object (22) (or a virtual image). For example, a wave guide (1012) may enable a real object (21) located outside the wearable electronic device (101) to be visually visible. Additionally, the wave guide (1012) may enable a virtual object (22) output from a light output module (1011) to be visually visible.

[0118] According to one embodiment, a wearable electronic device (101) and / or a wave guide (1012) can cause a virtual scene (e.g., 20b of FIG. 3) to appear superimposed on a real scene (e.g., 20a of FIG. 3) by overlaying a real object (21) and a virtual object (22) in a scene (20) seen by the user's eye (10). For example, the wearable electronic device (101) and / or the wave guide (1012) can cause a real object (21) and a virtual object (22) to appear superimposed. The wave guide (1012) may be defined and / or referred to as an image combiner that overlays a real object (21) and a virtual object (22).

[0119] According to one embodiment, the user's eye (10) may be separated from the wave guide (1012) by a first distance (L1), but the virtual object (22) output from the wave guide (1012) may be perceived as being located outside the wearable electronic device (101) by a second distance (L2) greater than the first distance (L1) from the wave guide (1012).

[0120] FIG. 4 is a perspective view of a wearable electronic device according to one embodiment of the present disclosure.

[0121] The embodiments of FIG. 4 can be combined with the embodiments of FIG. 1 to 3 and the embodiments of FIG. 5 to 26.

[0122] The components described with reference to FIG. 4 may be partially or entirely identical to the components described with reference to FIG. 1 to 3. The components described with reference to FIG. 4 may be partially or entirely identical to the components described with reference to FIG. 5 to 26.

[0123] Hereinafter, 'first direction' refers to the front of the wearable electronic device (101) and / or the direction of view when a user wears the wearable electronic device (101), and may refer to the +X direction with respect to FIG. 4. Hereinafter, 'second direction' refers to the direction opposite to the first direction (+X direction), and may refer to the -X direction with respect to FIG. 4. Hereinafter, 'third direction' refers to the direction facing downward of the wearable electronic device (101), and may refer to the +Y direction with respect to FIG. 4. Hereinafter, 'fourth direction' refers to the direction opposite to the third direction (+Y direction), and may refer to the -Y direction with respect to FIG. 4. Hereinafter, the length direction, width direction, and / or thickness direction (or height direction) of the wearable electronic device may be mentioned, the length direction may be defined as the 'X-axis direction', the thickness direction as the 'Y-axis direction', and the width direction may be defined as a direction intersecting the X-axis direction and the Y-axis direction.

[0124] Referring to FIG. 4, a wearable electronic device (101) (e.g., the electronic device (101) of FIG. 1) is an electronic device in the form of glasses, and a user can visually perceive surrounding objects or environments while wearing the wearable electronic device (101). For example, the wearable electronic device (101) may include smart glasses that can provide images directly in front of the user's eyes. The configuration of the wearable electronic device (101) of FIG. 4 may be partially or entirely identical to the configuration of the electronic device (101) of FIG. 1. Although not illustrated, embodiments of the wearable electronic device (101) of the present disclosure and descriptions thereof described below may also be applied to a head mounting device (HMD).

[0125] According to one embodiment, the wearable electronic device (101) may include a housing (210). The housing (210) may form at least a part of the exterior of the wearable electronic device (101). The housing (210) may provide a space in which parts of the wearable electronic device (101) can be placed. For example, the housing (210) may include a lens frame (202) and at least one wearable member (203).

[0126] According to one embodiment, the wearable electronic device (101) may include a display member (201) disposed at least partially within a housing (210).

[0127] According to one embodiment, the display member (201) can output a visual image. For example, a wearable electronic device (101) may include at least one display member (201) capable of providing visual information (or an image) to a user. For example, the display member (201) may include a lens, a display, a waveguide (e.g., the waveguide (1012) of FIG. 2), and / or a module equipped with a touch circuit. According to one embodiment, the display member (201) may be formed to be transparent or translucent. According to one embodiment, the display member (201) may include glass made of a translucent material or a window member whose light transmittance can be controlled as the color concentration is adjusted.

[0128] According to one embodiment, the lens frame (202) may accommodate at least a portion of the display member (201). For example, the lens frame (202) may surround at least a portion of the edge of the display member (201). According to one embodiment, the lens frame (202) may position at least one of the display members (201) corresponding to the user's eye. According to one embodiment, the lens frame (202) may include a rim of a general eyeglass structure. According to one embodiment, the lens frame (202) may include at least one closed curve surrounding the display member (201). According to one embodiment, the lens frame (202) may include a first rim portion (202a) and a second rim portion (202b) positioned on one side of the first rim portion (202a) in the width direction of the wearable electronic device (101) (e.g., a direction intersecting the X-axis and Y-axis directions). The first rim portion (202a) may be positioned adjacent to the first wearing member (203a), and the second rim portion (202b) may be positioned adjacent to the second wearing member (203b).

[0129] According to one embodiment, the lens frame (202) may include a bridge portion (202c) connecting a first rim portion (202a) and a second rim portion (202b).

[0130] According to one embodiment, a display member (201) corresponding to the user's right eye may be disposed in the first rim portion (202a). A display member (201) corresponding to the user's left eye may be disposed in the second rim portion (202b).

[0131] According to one embodiment, the wearable member (203) may extend from the lens frame (202). For example, the wearable member (203) may be connected to and / or coupled to the end of the lens frame (202) and, together with the lens frame (202), may be supported or positioned on the user's body (e.g., ear). According to one embodiment, the wearable member (203) may be rotated relative to the lens frame (202) via a hinge structure (229). According to one embodiment, the wearable member (203) may be defined and / or referred to as eyeglass temples.

[0132] According to one embodiment, the wearable member (203) may include an inner surface configured to face the user's body and an outer surface opposite to the inner surface. According to one embodiment (not shown), at least a portion of the wearable member (203) may be formed of a flexible material (e.g., rubber). For example, at least a portion of the wearable member (203) may be formed in a band shape that surrounds at least a portion of the user's body (e.g., ear).

[0133] According to one embodiment, the first wearable member (203a) may be positioned to correspond to the user's right ear when the wearable electronic device (101) is worn by the user. The first wearable member (203a) may include a first connection portion (2032a) and a first extension portion (2031a). According to an embodiment, the first connection portion (2032a) may be defined and / or interpreted as part of the lens frame (202) and / or the first rim portion (202a).

[0134] According to one embodiment, the first connecting portion (2032a) may extend from the first rim portion (202a) of the lens frame (202).

[0135] According to one embodiment, the first extension portion (2031a) may be rotatably connected to the first connecting portion (2032a). The first extension portion (2031a) may extend from the first connecting portion (2032a). The first extension portion (2031a) may be defined and / or referred to as the first leg portion.

[0136] According to one embodiment, the first extension portion (2031a) may be rotatably coupled to the first connecting portion (2032a) through a hinge structure (229). For example, the first extension portion (2031a) may be rotated to be folded or unfolded relative to the first connecting portion (2032a) and the lens frame (202). Accordingly, the first wearing member (203a) may be rotated relative to the first rim portion (202a) and the lens frame (202).

[0137] According to one embodiment, the first connecting portion (2032a) may accommodate a display engine (e.g., the light output module (211) of FIG. 5). For example, the display engine (e.g., the light output module (211) of FIG. 5) may be placed inside the first connecting portion (2032a) so as not to be visually exposed to the outside of the first wearable member (203a). In one embodiment, the display engine (e.g., the light output module (211) of FIG. 5) may be connected to at least one of the lens frame (202) or the wearable member (203). For example, the display engine (e.g., the light output module (211) of FIG. 5) may be connected to the lens frame (202), connected to the wearable member (203), or connected to both the lens frame (202) and the wearable member (203). In one embodiment, the display engine (e.g., the light output module (211) of FIG. 5) may be visually exposed to the outside.

[0138] According to one embodiment, the second wearable member (203b) may be positioned to correspond to the user's left ear when the wearable electronic device (101) is worn by the user. The second wearable member (203b) may include a second extension portion (2031b) and a second connecting portion (2032b). According to an embodiment, the second connecting portion (2032b) may be defined and / or interpreted as part of the lens frame (202) and / or the second rim portion (202b).

[0139] According to one embodiment, the second connecting portion (2032b) may extend from the second rim portion (202b) of the lens frame (202).

[0140] According to one embodiment, the second extension portion (2031b) may be rotatably connected to the second connecting portion (2032b). The second extension portion (2031b) may extend from the second connecting portion (2032b). The second extension portion (2031b) may be defined and / or referred to as a second leg portion.

[0141] According to one embodiment, the second extension portion (2031b) may be rotatably coupled to the second connecting portion (2032b) via a hinge structure (229). For example, the second extension portion (2031b) may be rotated to be folded or unfolded relative to the second connecting portion (2032b) and the lens frame (202). Accordingly, the second wearing member (203b) may be rotated relative to the second rim portion (202b) and the lens frame (202).

[0142] According to one embodiment, the second connection portion (2032b) may accommodate a display engine (e.g., the light output module (211) of FIG. 5). For example, the display engine (e.g., the light output module (211) of FIG. 5) may be placed inside the second connection portion (2032b) so as not to be visually exposed to the outside of the second wearable member (203b).

[0143] According to one embodiment, the wearable electronic device (101) may include a hinge structure (229) configured to allow the wearable member (203) to be folded relative to the lens frame (202). The hinge structure (229) may be positioned between the lens frame (202) and the wearable member (203).

[0144] According to one embodiment, the hinge structure (229) may include a first hinge structure (229a) connected to a first connecting portion (2032a) and a first extension portion (2031a). The first hinge structure (229a) may allow the first extension portion (2031a) to rotate relative to the first connecting portion (2032a). Accordingly, the first wearing member (203a) and / or the first extension portion (2031a) may rotate relative to the lens frame (202) (e.g., the first rim portion (202a)).

[0145] According to one embodiment, the hinge structure (229) may include a second hinge structure (229b) connected to a second connecting portion (2032b) and a second extension portion (2031b). The second hinge structure (229b) may allow the second extension portion (2031b) to rotate relative to the second connecting portion (2032b). Accordingly, the second wearing member (203b) and / or the second extension portion (2031b) may rotate relative to the lens frame (202) (e.g., the second rim portion (202b)).

[0146] According to one embodiment, when the user is not wearing the wearable electronic device (101), the user can fold the wearable member (203) so that a portion overlaps with the lens frame (202) and carry or store it.

[0147] According to one embodiment, the wearable electronic device (101) may include a glasses-type device capable of providing augmented reality to the user.

[0148] In the present disclosure, 'Augmented Reality' may mean overlaying a computer-generated virtual image onto a physical, real-world environment or a real-world object to display it as a single image.

[0149] In the present disclosure, a "real scene" is a scene of the real world viewed by an observer or user through an augmented reality display device (e.g., a wearable electronic device (101)), and may include real world object(s). Meanwhile, a "virtual image" may be an image generated through a display engine (e.g., the light output module (211) of FIG. 5 described later). A "virtual image" may include an image of a virtual object. A virtual image may include both static and dynamic images. Such a virtual image may be an image that is overlaid on the real scene to display information about a real object in the real scene, information about the operation of the augmented reality device, or a control menu.

[0150] According to one embodiment, the wearable electronic device (101) may include a display engine (e.g., the light output module (211) of FIG. 5) for generating a virtual image composed of light generated from a light source.

[0151] According to one embodiment, at least one display member (201) may include a wave guide (e.g., wave guide (1012) of FIG. 2) configured to guide a virtual image provided from a display engine (e.g., light output module (211) of FIG. 5) to the user's eye.

[0152] FIG. 5 is an assembled perspective view for explaining the internal configuration of a wearable electronic device according to one embodiment of the present disclosure. FIG. 6 is an exploded perspective view of a wearable electronic device according to one embodiment of the present disclosure.

[0153] The detailed configuration of the wearable electronic device (101) of FIGS. 5 and FIGS. 6, which is not described below, may be the same or similar to the detailed configuration of the electronic device (101) described in relation to FIG. 1 and / or the detailed configuration of the wearable electronic device (101) described in relation to FIGS. 2 to FIGS. 4.

[0154] Referring to FIGS. 5 and 6, a wearable electronic device (101) (e.g., the wearable electronic device (101) of FIG. 4) may include a display member (201), a lens frame (202), a wearing member (203), a hinge structure (229), at least one circuit board (241), at least one battery (243), at least one power delivery structure (246), a camera module (253, 255) and / or a sensor module (280), but some of these may be excluded and implemented, and additional configurations other than these are not excluded.

[0155] According to one embodiment, a wearable electronic device (101) may acquire and / or perceive a visual image of an object or environment in the direction that the user is looking at or the wearable electronic device (101) is facing (e.g., a first direction (+X direction)) using a camera module (253, 255), and may receive information regarding the object or environment from an external electronic device (e.g., an electronic device (102, 104) of FIG. 1, or a server (108) of FIG. 1) through a network (e.g., a first network (198) or a second network (199) of FIG. 1). In one embodiment, the wearable electronic device (101) may provide the received information regarding the object or environment to the user in an auditory or visual form. The wearable electronic device (101) may provide the received information regarding the object or environment to the user in a visual form through a display member (201) using a display module (e.g., a display module (160) of FIG. 1). For example, the wearable electronic device (101) can implement augmented reality by implementing information about objects or environments in a visual form and combining it with actual images of the user's surrounding environment.

[0156] According to one embodiment, the display members (201) are provided in pairs and can be positioned to correspond to the user's left eye and right eye, respectively, when the wearable electronic device (101) is worn on the user's body. For example, the display members (201) may include a first display member (201a) and a second display member (201b) positioned spaced apart from the first display member (201a). The first display member (201a) may be positioned to correspond to the user's right eye, and the second display member (201b) may be positioned to correspond to the user's left eye.

[0157] According to one embodiment, the first marking member (201a) may be placed on the first rim portion of the lens frame (202) (e.g., the first rim portion (202a) of FIG. 4), and the second marking member (201b) may be placed on the second rim portion of the lens frame (202) (e.g., the second rim portion (202b) of FIG. 4).

[0158] According to one embodiment, the display member (201) may include a first surface (F1) facing a viewing direction (e.g., a first direction (+X direction)) when the user wears the wearable electronic device (101) and a second surface (F2) facing a direction opposite to the first surface (F1) (e.g., a second direction (-X direction)). When the user is wearing the wearable electronic device (101), at least a portion of the light or image incident through the first surface (F1) may pass through the second surface (F2) of the display member (201) positioned to face the user's left eye and / or right eye and be incident on the user's left eye and / or right eye.

[0159] According to one embodiment, the lens frame (202) may include at least two frames. For example, the lens frame (202) may include a first frame (2021a) and a second frame (2021b). For example, the second frame (2021b) may form the front surface of the lens frame (202) (e.g., the surface facing the first direction (+X direction) of the lens frame (202). For example, the first frame (2021a) may be a side wall of the lens frame (202) formed along the edge of the second frame (2021b). When a user wears the wearable electronic device (101), the first frame (2021a) may be a frame in the portion adjacent to the user's face, and the second frame (2021b) may be a part of the lens frame (202) positioned on the first direction (+X direction) side of the first frame (2021a).

[0160] According to one embodiment, a wearable electronic device (101) may include a light output module (211) configured to provide an image and / or video to a user. For example, the light output module (211) may include a display panel (not shown) capable of outputting a video and a lens (not shown) corresponding to the user's eye and guiding the video to a display member (201). For example, the user may obtain a video output from the display panel of the light output module (211) through the lens of the light output module (211).

[0161] According to one embodiment, the light output module (211) may include a device configured to display various information. For example, the light output module (211) may include at least one of a liquid crystal display (LCD), a digital mirror device (DMD), a liquid crystal on silicon (LCoS), an organic light emitting diode (OLED), or a micro light emitting diode (micro LED). According to one embodiment, if the light output module (211) and / or the display member (201) includes one of a liquid crystal display, a digital mirror device, or a silicon liquid crystal display, the wearable electronic device (101) may include a light source that irradiates light onto a display area of ​​the light output module (211) and / or the display member (201). According to one embodiment, if the light output module (211) and / or display member (201) includes one of an organic light-emitting diode or a micro LED, the wearable electronic device (101) can provide a virtual image to the user without including a separate light source.

[0162] According to one embodiment, at least a portion of the light output module (211) may be disposed within the housing (210). For example, the light output module (211) may be disposed within the wearable member (203) and connected to the display member (201), and may provide an image to the user through the display member (201). For example, an image output from the light output module (211) may be incident on the display member (201) and radiated toward the user's eye through an output optical member (or output grating area) defined by a wave guide (e.g., wave guide (1012) of FIG. 2) located in at least a portion of the display member (201) and an outcoupler of the wave guide. The output optical member may form an eye-box (EB) corresponding to the user's eye.

[0163] According to one embodiment, the wearable electronic device (101) may include a circuit board (241) (e.g., a printed circuit board (PCB), a printed board assembly (PBA), a flexible PCB (FPCB), or a rigid-flexible PCB (RFPCB)) that accommodates components for driving the wearable electronic device (101). For example, the circuit board (241) may include at least one integrated circuit chip, and at least one of a processor (not shown) (e.g., processor (120) of FIG. 1), a memory (not shown) (e.g., memory (130) of FIG. 1), a power management module (not shown) (e.g., power management module (188) of FIG. 1), or a communication module (e.g., communication module (190) of FIG. 1) may be provided on the integrated circuit chip. According to one embodiment, the circuit board (241) may be disposed within a wearable member (203) of a housing (210). For example, the circuit board (241) may include a first circuit board (241a) disposed within a first wearable member (203a) and a second circuit board (241b) disposed within a second wearable member (203b). According to one embodiment, a communication module (e.g., communication module (190) of FIG. 1) may be disposed within the first wearable A first circuit board (241a) located within a member (203a) may be placed, and a processor (e.g., processor (120) of FIG. 1) may be placed on a second circuit board (241b) located within a second wearable member (203b). According to one embodiment, the circuit board (241) may be electrically connected to a battery (243) (e.g., battery (189) of FIG. 1) through a power delivery structure (246). According to one embodiment, the circuit board (241) may be an interposer board.

[0164] According to one embodiment, the battery (243) can be electrically connected to components of the wearable electronic device (101) (e.g., a light output module (211), a circuit board (241), a speaker module (245), a microphone module (247) and / or a camera module (253, 255)) and can supply power to the components of the wearable electronic device (101).

[0165] According to one embodiment, at least a portion of the battery (243) may be disposed in the wearable member (203). According to one embodiment, the battery (243) may include a first battery (243a) disposed within the first wearable member (203a) and a second battery (243b) disposed within the second wearable member (203b). According to one embodiment, the battery (243) may be disposed adjacent to the ends (203c, 203d) of the wearable member (203).

[0166] According to one embodiment, a speaker module (245) (e.g., the audio module (170) or sound output module (155) of FIG. 1) can convert an electrical signal into sound. At least a portion of the speaker module (245) may be placed within a wearable member (203) of a housing (210). According to one embodiment, the speaker module (245) may be positioned within the wearable member (203) to correspond to the user's ear. According to one embodiment (e.g., FIG. 5), the speaker module (245) may be placed next to a circuit board (241). For example, the speaker module (245) may be placed between the circuit board (241) and a battery (243). According to one embodiment (not shown), the speaker module (245) may be placed on the circuit board (241). For example, the speaker module (245) may be placed between the circuit board (241) and an inner case (e.g., the inner case (231) of FIG. 6).

[0167] According to one embodiment, the wearable electronic device (101) may include a power delivery structure (246) configured to deliver power from a battery (243) to an electronic component of the wearable electronic device (101) (e.g., an optical output module (211)). For example, the power delivery structure (246) is electrically connected to the battery (243) and / or a circuit board (241), and the circuit board (241) can deliver power received through the power delivery structure (246) to the optical output module (211). According to one embodiment, the power delivery structure (246) may be configured to deliver power. For example, the power delivery structure (246) may include a flexible printed circuit board or a wire. For example, the wire may include a plurality of cables (not shown). In one embodiment, the shape of the power delivery structure (246) may be varied in various ways, taking into account the number and / or type of cables, etc.

[0168] According to one embodiment, a microphone module (247) (e.g., the input module (150) and / or audio module (170) of FIG. 1) can convert sound into an electrical signal. According to one embodiment, the microphone module (247) can be placed within a lens frame (202). For example, at least one microphone module (247) can be placed at the bottom (e.g., the end facing the third direction (+Y direction) of the lens frame (202)) and / or the top (e.g., the end facing the fourth direction (-Y direction) of the lens frame (202)) of the wearable electronic device (101). According to one embodiment, the wearable electronic device (101) can more clearly recognize the user's voice by using voice information (e.g., sound) obtained from at least one microphone module (247). For example, the electronic device (101) can distinguish voice information and ambient noise based on acquired voice information and / or additional information (e.g., low-frequency vibrations of the user's skin and bones). For example, the wearable electronic device (101) can clearly recognize the user's voice and perform a function to reduce ambient noise (e.g., noise canceling).

[0169] According to one embodiment, the wearable electronic device (101) may include a light source (251). The light source (251) may be placed in a lens frame (202), but is not limited thereto.

[0170] According to one embodiment, the light source (251) may be configured to correspond to the user's left eye and right eye, respectively. The light source (251) may include an IR light source (e.g., IR LED) that emits infrared radiation (IR) light, but is not limited thereto.

[0171] According to one embodiment, a light source (251) may be configured to irradiate light of a preset wavelength band (e.g., infrared band) toward a user's eyeball. The user's eyeball, a part of the body adjacent to the eyeball (e.g., eyelid), or the pupil of the user's eyeball may reflect the light incident from the light source (251).

[0172] According to one embodiment, a wearable electronic device (101) can acquire light reflected by the user's pupil, which is irradiated from a light source (251), using a camera (e.g., an ET (eye tracking) camera) to identify the direction in which the user's pupil is facing (e.g., the direction of the user's gaze).

[0173] According to one embodiment, the wearable electronic device (101) may include a camera module (253, 255). The camera module (253, 255) may capture still images and / or videos. The camera module (253, 255) may include at least one of a lens, at least one image sensor, an image signal processor, or a flash. According to one embodiment, the camera module (253, 255) may be placed within a lens frame (202) and around a display member (201).

[0174] According to one embodiment, a first camera module (253) may be included. According to one embodiment, the first camera module (253) may capture an external image. According to one embodiment, the first camera module (253) may capture an external image through a second optical hole (223) formed in the second frame (2021b). For example, the first camera module (253) may include a high-resolution color camera and may be a high-resolution (HR) or photo-video (PV) camera. According to one embodiment, the first camera module (253) may provide an autofocus (AF) function and an optical image stabilizer (OIS) function.

[0175] According to one embodiment (not shown), the wearable electronic device (101) may include a flash (not shown) positioned adjacent to the first camera module (253). For example, the flash (not shown) may provide light to increase the brightness (e.g., illumination) around the wearable electronic device (101) when acquiring an external image of the first camera module (253), and may reduce the difficulty of acquiring an image due to a dark environment, the mixing of various light sources, and / or light reflection.

[0176] According to one embodiment, at least one second camera module (255) can capture a user's movements through a first optical hole (221) formed in the lens frame (202). For example, the second camera module (255) can capture a user's gesture (e.g., hand movement). The second camera module (255) and / or the first optical hole (221) may be positioned at each end of the lens frame (202) (e.g., second frame (2021b)) on both sides of the lens frame (202) (e.g., second frame (2021b)), for example, in the width direction (e.g., a direction intersecting the X-axis and Y-axis directions). According to one embodiment, the second camera module (255) may be a camera with a global shutter (GS) type. For example, the second camera module (255) can be a camera that supports 3DoF (degrees of freedom) or 6DoF and can provide 360-degree spatial (e.g., omnidirectional), position recognition and / or motion recognition.

[0177] According to one embodiment, the second camera module (255) can perform simultaneous localization and mapping (SLAM) and user motion recognition functions using a plurality of global shutter type cameras of the same specifications and performance as stereo cameras. According to one embodiment, the second camera module (255) may include an infrared (IR) camera (e.g., a time of flight (TOF) camera or a structured light camera). For example, the IR camera may operate as at least part of a sensor module (e.g., the sensor module (176) of FIG. 1) for detecting the distance to a subject.

[0178] According to one embodiment, at least one of the second camera module (255) may be replaced with a sensor module (e.g., sensor module (176) of FIG. 1). For example, the sensor module may include at least one of a vertical cavity surface emitting laser (VCSEL), an infrared sensor, and / or a photodiode. For example, the photodiode may include a positive intrinsic negative (PIN) photodiode or an avalanche photodiode (APD). The photodiode may be interpreted as a photodetector or a photosensor.

[0179] According to one embodiment, at least one of the first camera module (253) or the second camera module (255) may include a plurality of camera modules (not shown). For example, the first camera module (253) may be composed of a plurality of lenses (e.g., wide-angle and telephoto lenses) and image sensors and may be placed on one side of the wearable electronic device (101) (e.g., the side facing the first direction (+X direction)). For example, the wearable electronic device (101) may include a plurality of camera modules each having different attributes (e.g., angle of view) or functions, and may be controlled to change the angle of view of the camera modules based on user selection and / or trajectory information. For example, at least one of the plurality of camera modules may be a wide-angle camera and at least another may be a telephoto camera.

[0180] According to one embodiment, a processor (e.g., processor (120) of FIG. 1) can determine the movement of the wearable electronic device (101) and / or the movement of the user by using information of the wearable electronic device (101) obtained using at least one of a gesture sensor, a gyroscope sensor, or an accelerometer sensor of a sensor module (e.g., sensor module (176) of FIG. 1) and a user's movement (e.g., approach of the user's body to the wearable electronic device (101)) obtained using a second camera module (255). According to one embodiment, the wearable electronic device (101) may include, in addition to the described sensors, a magnetic (geomagnetic) sensor capable of measuring orientation using a magnetic field and magnetic force and / or a Hall sensor capable of obtaining movement information (e.g., direction of movement or distance of movement) using the strength of the magnetic field. For example, the processor can determine the movement of the wearable electronic device (101) and / or the movement of the user based on information obtained from a magnetic (geomagnetic) sensor and / or a Hall sensor.

[0181] According to one embodiment (not shown), a wearable electronic device (101) can perform an input function (e.g., touch and / or pressure sensing function) capable of interacting with a user. For example, a component configured to perform a touch and / or pressure sensing function (e.g., a touch sensor and / or pressure sensor) may be placed in at least a part of a wearable member (203). The wearable electronic device (101) can control a virtual image output through a display member (201) based on information obtained through said component. For example, the sensor associated with the touch and / or pressure sensing function may be configured in various ways, such as a resistive type, a capacitive type, an electromagnetic induction type (EM), or an optical type. According to one embodiment, the component configured to perform said touch and / or pressure sensing function may be partially or entirely identical to the configuration of the input module (150) of FIG. 1.

[0182] According to one embodiment, the wearable electronic device (101) may include a reinforcing member (260) that is disposed in the internal space of the lens frame (202) and is formed to have a higher rigidity than the rigidity of the lens frame (202).

[0183] According to one embodiment, the electronic device (101) may include a lens structure (273). The lens structure (273) may refract at least a portion of light. For example, the lens structure (273) may be a prescription lens having a specified refractive power. According to one embodiment, at least a portion of the lens structure (273) may be positioned at the rear of the display member (201) (e.g., the second direction (-X direction) side of the display member (201)). For example, the lens structure (273) may be positioned between the display member (201) and the user's eye.

[0184] According to one embodiment, the housing (210) may include a hinge cover (227) capable of concealing a portion of the hinge structure (229). Another portion of the hinge structure (229) may be received or concealed between the inner cover (231) and the outer cover (233), which will be described later.

[0185] According to one embodiment, the wearable member (203) may include an inner cover (231) and an outer cover (233). For example, the inner cover (231) is a cover configured to face or directly contact the user's body and may be made of a material with low thermal conductivity, for example, a synthetic resin. According to one embodiment, the inner cover (231) may include an inner surface facing the user's body. For example, the outer cover (233) may include a material capable of at least partially transferring heat (e.g., a metallic material) and may be coupled to face the inner cover (231). According to one embodiment, the outer cover (233) may include an outer surface opposite to the inner surface. In one embodiment, at least one of a circuit board (241) or a speaker module (245) may be accommodated in a space separated from the battery (243) within the wearable member (203). In the illustrated embodiment, the inner cover (231) may include a first cover (231a) that accommodates a circuit board (241) and / or a speaker module (245) and a second cover (231b) that accommodates a battery (243), and the outer cover (233) may include a third cover (233a) that is coupled to face the first cover (231a) and a fourth cover (233b) that is coupled to face the second cover (231b). For example, the first cover (231a) and the third cover (233a) can be combined (hereinafter referred to as the 'first cover portion (231a, 233a)') to accommodate a circuit board (241) and / or a speaker module (245), and the second cover (231b) and the fourth cover (233b) can be combined (hereinafter referred to as the 'second cover portion (231b, 233b)') to accommodate a battery (243).

[0186] According to one embodiment, the first cover portion (231a, 233a) is rotatably coupled to the lens frame (202) through a hinge structure (229), and the second cover portion (231b, 233b) can be connected or mounted to the end of the first cover portion (231a, 233a) through a connecting structure (235). According to one embodiment, the part of the connecting structure (235) that contacts the user's body may be made of an elastic material with low thermal conductivity, such as silicone, polyurethane, or rubber, and the part that does not contact the user's body may be made of a material with high thermal conductivity (e.g., a metal material). For example, when heat is generated in the circuit board (241) or battery (243), the connecting structure (235) can block the transfer of heat to the part that contacts the user's body and disperse or release the heat through the part that does not contact the user's body. According to one embodiment, the portion of the connection structure (235) configured to come into contact with the user's body may be interpreted as part of the inner cover (231), and the portion of the connection structure (235) that does not come into contact with the user's body may be interpreted as part of the outer cover (233). According to one embodiment (not shown), the first cover (231a) and the second cover (231b) may be formed integrally without the connection structure (235), and the third cover (233a) and the fourth cover (233b) may be formed integrally without the connection structure (235). According to one embodiment, in addition to the illustrated components, other components (e.g., the antenna module (197) of FIG. 1) may be included, and information regarding objects or environments may be received from an external electronic device (e.g., the electronic device (102, 104) of FIG. 1, or the server (108) of FIG. 1) through a network (e.g., the first network (198) or the second network (199) of FIG. 1) using a communication module (e.g., the communication module (190) of FIG. 1).

[0187] According to one embodiment, the lens frame (202) may include a bridge portion (274) between the first marking member (201a) and the second marking member (201b) (e.g., the bridge portion (202c) of FIG. 4). For example, the bridge portion (274) may be interpreted as a portion corresponding to the nose pad of the glasses.

[0188] According to one embodiment, the wearable electronic device (101) may include a connection member (205). According to one embodiment, a circuit board (241) is connected to the connection member (205) and can transmit electrical signals to components of the wearable electronic device (101) (e.g., a light output module (211) and / or a camera module (253, 255)) through the connection member (205). For example, a control signal transmitted from a processor located on the circuit board (241) (e.g., the processor (120) of FIG. 1) may be transmitted to the electronic components using at least a portion of the connection member (205). For example, at least a portion of the connection member (205) may include wiring (not shown) electrically connected to the components of the wearable electronic device (101).

[0189] According to one embodiment, the connecting member (205) may include a first connecting member (205a) in which at least a portion is disposed within a first wearing member (203a) and a second connecting member (205b) in which at least a portion is disposed within a second wearing member (203b). According to one embodiment, at least a portion of the first connecting member (205a) and / or the second connecting member (205b) may face a hinge structure (229). For example, the first connecting member (205a) may extend from a first circuit board (241a) across the hinge structure (229) into the interior of a lens frame (202). The second connecting member (205b) may extend from a second circuit board (241b) across the hinge structure (229) into the interior of a lens frame (202). For example, a portion of the first connecting member (205a) and a portion of the second connecting member (205b) may be placed within the wearing member (203), and another portion may be placed within the lens frame (202).

[0190] According to one embodiment, the first connecting member (205a) and the second connecting member (205b) may include a structure that can be folded or unfolded based on the rotation of the hinge structure (229). For example, the first connecting member (205a) and / or the second connecting member (205b) may include a flexible printed circuit board (FPCB). According to one embodiment, the first connecting member (205a) may be electrically and / or mechanically connected to the first circuit board (241a). According to one embodiment, the second connecting member (205b) may be electrically and / or mechanically connected to the second circuit board (241b). According to one embodiment, the first connecting member (205a) and / or the second connecting member (205b) may include a structure for transmitting a signal (e.g., wiring and / or cables).

[0191] According to one embodiment, a sensor module (280) (e.g., sensor module (176) of FIG. 1) can detect light passing through a display member (201). According to one embodiment, the sensor module (280) may include a first sensor module (281) capable of detecting light passing through a first display member (201a) and a second sensor module (282) capable of detecting light passing through a second display member (201b). For example, the first sensor module (281) can detect light at the rear of the first display member (201a) (e.g., the second direction (-X direction) side of the first display member (201a)), and the second sensor module (282) can detect light at the rear of the second display member (201b) (e.g., the second direction (-X direction) side of the second display member (201b). According to one embodiment, the sensor module (280) may include a third sensor module (283) capable of detecting light in front of the display member (201) (e.g., a first direction (+X direction)). For example, the third sensor module (283) may detect light entering from the front of the display member (201) (e.g., a first direction (+X direction)). According to one embodiment, the sensor module (280) may be an illuminance sensor. According to one embodiment, the third sensor module (283) may have some or all of the same configuration as the first camera module (253).

[0192] FIG. 7 is a perspective view of a wearable electronic device according to one embodiment of the present disclosure. FIG. 8 is a cross-sectional view of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 9 illustrates a cross-sectional view and an optical path of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 10 is a graph showing spherical aberration of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 11 is a graph showing astigmatism of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 12 is a graph showing distortion aberration of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0193] Specifically, FIG. 7 is a perspective view showing a wearable electronic device (301) viewed from the rear (e.g., the second direction (-X direction)). FIG. 8 is a cross-sectional view showing a display engine (305) cut in the front-rear direction (e.g., the first direction (+X direction) and / or the second direction (-X direction)). FIG. 9 shows the arrangement of a projection system (PS) and an optical path separation member (330) and an optical path passing through them. FIG. 10 is a graph showing the spherical aberration of the projection system (PS) and the optical path separation member (330) shown in FIG. 9. FIG. 11 is a graph showing the astigmatism of the projection system (PS) and the optical path separation member (330) shown in FIG. 9. FIG. 12 is a graph showing the distortion aberration of the projection system (PS) and the optical path separation member (330) shown in FIG. 9.

[0194] Hereinafter, the wearable electronic device (301) may include a lens frame (302), a wearable member (303), and a display engine (305), but other additional configurations are not excluded.

[0195] Hereinafter, 'first direction' refers to the direction in which light containing image information is emitted from the display engine (305) and / or the front of the wearable electronic device (301), and may refer to the +X direction, which is the left direction based on FIG. 8. The first direction (+X direction) may be referred to as 'forward'. 'Second direction' refers to the direction opposite to the first direction (+X direction), and may refer to the -X direction, which is the right direction based on FIG. 8. The second direction (-X direction) may be referred to as 'rear'. 'Third direction' refers to the direction intersecting the first direction (+X direction) and / or the second direction (-X direction), and may refer to the +Y direction, which is the downward direction based on FIG. 8. The third direction (+Y direction) may be referred to as 'downward'. 'Fourth direction' refers to the direction opposite to the third direction (+Y direction), and may refer to the -Y direction, which is the upward direction based on FIG. 8. The fourth direction (-Y direction) can be referred to as 'upward'.

[0196] The detailed configuration of the wearable electronic device (301) not described below may be the same or similar as the detailed configuration of the electronic device (101) described in relation to FIG. 1 and / or the detailed configuration of the wearable electronic device (101) described in relation to FIG. 2 through FIG. 6. The detailed configuration of the display engine (305) not described below may be the same or similar as the detailed configuration of the light output module (1011) described in relation to FIG. 2 and / or the detailed configuration of the light output module (211) described in relation to FIG. 5.

[0197] According to one embodiment, the wearable electronic device (301) may include a lens frame (302) (e.g., the lens frame (202) of FIGS. 4 to 6). The lens frame (302) may be configured to accommodate a transparent member (304).

[0198] According to one embodiment, the lens frame (302) may include a rim portion (3021) (e.g., the first rim portion (202a) and / or the second rim portion (202b) of FIG. 4). The rim portion (3021) may form the front surface of the lens frame (302) (e.g., the surface facing the first direction (+X direction)). A transparent member (304) may be seated on the rim portion (3021).

[0199] According to one embodiment, the lens frame (302) may include a connecting portion (3022) (e.g., the first connecting portion (2032a) and / or the second connecting portion (2032b) of FIG. 4). The connecting portion (3022) may be formed on both sides of the rim portion (3021) and / or in an area adjacent to both sides of the rim portion (3021). The connecting portion (3022) may extend rearward from the rim portion (3021) (e.g., in the second direction (-X direction)).

[0200] According to one embodiment, the wearable electronic device (301) may include a wearable member (303) (e.g., the wearable member (203) of FIGS. 4 to 6). The wearable member (303) may be connected to a lens frame (302). For example, the wearable member (303) may extend rearward (e.g., in a second direction (-X direction)) from the edge of the lens frame (302) and / or an area adjacent to the edge. For example, the wearable member (303) may extend from a connecting portion (3022) of the lens frame (302).

[0201] According to one embodiment, the wearable electronic device (301) may include a transparent member (304) (e.g., the display member (201) of FIGS. 4 to 6). The transparent member (304) may be mounted on a lens frame (302). A user may visually perceive a physical, real-world environment through the transparent member (304). Light containing visual information (e.g., images and / or videos) emitted from a display engine (305) is displayed on the transparent member (304), and the user may visually perceive the image emitted on the transparent member (304). For example, the transparent member (304) may include a wave guide (e.g., the wave guide (1012) of FIG. 2) configured to guide a virtual image emitted from the display engine (305) to the user's eye (e.g., the user's eye (10) of FIG. 2).

[0202] According to one embodiment, the wearable electronic device (301) may include a display engine (305) (e.g., the light output module (211) of FIG. 5). The display engine (305) may be connected to at least one of a lens frame (302) (e.g., a rim portion (3021) and / or a connecting portion (3022)) or a wearable member (303). For example, the display engine (305) may be connected to the wearable member (303). For example, the display engine (305) may be mounted on the wearable member (303). The display engine (305) may be placed on an inner surface of the wearable member (303) (e.g., the mutually facing surfaces of two wearable members (303)) so that it is not visually exposed to the outside while the user is wearing the wearable electronic device (301). In one embodiment, the display engine (305) may be received and / or disposed within a connecting portion (3022) (e.g., the first connecting portion (2032a) and / or the second connecting portion (2032b) of FIG. 5) and / or a wearing member (303) (e.g., the first extension portion (2031a) and / or the second extension portion (2031b) of FIG. 5), as shown in FIG. 5. The display engine (305) may be configured to emit an image that is projected onto a transparent member (304). For example, the display engine (305) may be configured to emit light containing virtual visual information generated by the display engine (305). For example, the display engine (305) may be referred to as a 'light engine', a 'light output module', and / or a 'lens assembly'.

[0203] According to one embodiment, the display engine (305) may include a projection system (PS). The projection system (PS) may be configured to provide a path through which light (P4) containing virtual visual information is emitted. The projection system (PS) may be positioned in a forward direction (e.g., a first direction (+X direction) and / or a second direction (-X direction)). For example, the projection system (PS) may be referred to as a 'projection assembly', a 'projection lens assembly', and / or a 'projection module'.

[0204] Unless otherwise noted, the radius of curvature, thickness, TTL (total track length from image plane), OPL (optical path length), focal length, etc. of the lens in the present disclosure may all be in the unit of mm. Additionally, the thickness of the lens, the spacing between lenses, TTL, and OPL may be distances measured around the optical axis of the lens (e.g., the optical axis (OI) in FIG. 9). Furthermore, in the description of the shape of the lens, the meaning that one surface is convex means that the optical axis portion of the surface (e.g., the optical axis (OI) in FIG. 9) is convex, and the meaning that one surface is concave means that the optical axis portion of the surface (e.g., the optical axis (OI) in FIG. 9) is concave. For example, in the description of the shape of the lens, the meaning that one surface is convex means that the center of the radius of curvature of the surface is located in the space opposite to the space facing the surface, and the meaning that one surface is concave means that the center of the radius of curvature of the surface is located in the space facing the surface. Even if one surface of the lens (the portion of the optical axis of the said surface (e.g., the portion of the optical axis (OI) in FIG. 9)) is described as having a convex shape, the edge portion of the lens (the portion spaced a predetermined distance from the portion of the optical axis of the said surface (e.g., the portion of the optical axis (OI) in FIG. 9)) may be concave. Likewise, even if one surface of the lens (the portion of the optical axis of the said surface (e.g., the portion of the optical axis (OI) in FIG. 9)) is described as having a concave shape, the edge portion of the lens (the portion spaced a predetermined distance from the portion of the optical axis of the said surface (e.g., the portion of the optical axis (OI) in FIG. 9)) may be convex. In the following detailed description and claims, the term "inflection point" may refer to a point where the radius of curvature changes in a portion that does not intersect the optical axis (e.g., the portion of the optical axis (OI) in FIG. 9).

[0205] According to one embodiment, the projection system (PS) may include a plurality of projection lenses (310). The plurality of projection lenses (310) may be arranged in a front-rear direction (e.g., a first direction (+X direction) and / or a second direction (-X direction)). For example, the plurality of projection lenses may be positioned on an optical axis (OI) passing through the plurality of projection lenses. For example, the plurality of projection lenses (310) may be arranged in a second direction (-X direction) opposite to the first direction (+X direction) in which visual information is emitted.

[0206] According to one embodiment, a plurality of projection lenses (310) may include five lenses. For example, the plurality of projection lenses (310) may include a first projection lens (311), a second projection lens (312), a third projection lens (313), a fourth projection lens (314), and / or a fifth projection lens (315) arranged sequentially in a second direction (-X direction). The first projection lens (311) to the fifth projection lens (315) may each be composed of a spherical lens or an aspherical lens. In one embodiment, the plurality of projection lenses (310) may include four or fewer lenses, or six or more lenses. Through the plurality of projection lenses (310) according to one embodiment, a bright Fno value with a large aperture can be realized.

[0207] According to one embodiment, a plurality of projection lenses (310) may include a first projection lens (311). The first projection lens (311) may be positioned at the end of the first direction (+X direction) of the plurality of projection lenses (310). For example, the first projection lens (311) may be a lens located at the foremost of the plurality of projection lenses (310). For example, the first projection lens (311) may be positioned in front of the optical path separation member (330) (e.g., on the first direction (+X direction) side). According to one embodiment, the first projection lens (311) may be composed of a spherical lens. In one embodiment, the first projection lens (311) may be composed of an aspherical lens.

[0208] According to one embodiment, the first projection lens (311) may have a positive refractive power. This enables the implementation of a large-aperture lens. The first projection lens (311) may include a first surface (S2). The first surface (S2) may be a surface facing the first direction (+X direction) of the first projection lens (311). The first surface (S2) may have a convex shape. For example, the first projection lens (311) may have a refractive index greater than approximately 1.6.

[0209] According to one embodiment, a plurality of projection lenses (310) may include a second projection lens (312). The second projection lens (312) may be positioned on the second direction (-X direction) side of the first projection lens (311). For example, the second projection lens (312) may be positioned behind the first projection lens (311). For example, the second projection lens (312) may be positioned behind the optical path separation member (330) (e.g., on the second direction (-X direction) side). According to one embodiment, the second projection lens (312) may be composed of a spherical lens. In one embodiment, the second projection lens (312) may be composed of an aspherical lens.

[0210] According to one embodiment, the second projection lens (312) may have a negative refractive power. This allows for proper power distribution between the first projection lens (311) and the second projection lens (312). For example, the second projection lens (312) may have a refractive index greater than approximately 1.6.

[0211] According to one embodiment, a plurality of projection lenses (310) may include a third projection lens (313). The third projection lens (313) may be positioned on the second direction (-X direction) side of the second projection lens (312). For example, the third projection lens (313) may be positioned on the second direction (-X direction) side of the second projection lens (312). According to one embodiment, the third projection lens (313) may be composed of a spherical lens. In one embodiment, the third projection lens (313) may be composed of an aspherical lens. According to one embodiment, the third projection lens (313) may have a positive refractive power. In one embodiment, the third projection lens (313) may have a negative refractive power.

[0212] According to one embodiment, a plurality of projection lenses (310) may include a fourth projection lens (314). The fourth projection lens (314) may be positioned on the second direction (-X direction) side of the third projection lens (313). For example, the fourth projection lens (314) may be positioned behind the third projection lens (313). The fourth projection lens (314) may be positioned on the first direction (+X direction) side of the fifth projection lens (315). For example, the fourth projection lens (314) may be positioned in front of the fifth projection lens (315). According to one embodiment, the fourth projection lens (314) may be composed of an aspherical lens. According to one embodiment, the fourth projection lens (314) may include a glass material.

[0213] According to one embodiment, a plurality of projection lenses (310) may include a fifth projection lens (315). The fifth projection lens (315) may be positioned on the second direction (-X direction) side of the fourth projection lens (314). For example, the fifth projection lens (315) may be positioned behind the fourth projection lens (314). The fifth projection lens (315) may be adjacent to the image generation unit (316). For example, the fifth projection lens (315) may be positioned on the first direction (+X direction) side (e.g., the front side) of the image generation unit (316). According to one embodiment, the fifth projection lens (315) may include a plastic material.

[0214] According to one embodiment, among the plurality of projection lenses (310), the lens positioned on the first direction (+X direction) side of the lens adjacent to the image generation unit (316) may have a positive refractive power. For example, the fourth projection lens (314) may have a positive refractive power. The fourth projection lens (314) may be composed of a high-refractive index lens having a relatively high refractive index. For example, the fourth projection lens (314) may have a refractive index of approximately 1.8 or higher. For example, the fourth projection lens (314) may have an Abbe number of approximately 45 or lower. In one embodiment, as the fourth projection lens (314) is composed of a high-refractive index lens, the optical path in the projection system (PS) may be reduced, and the optical electric field of the display engine (305) (e.g., the length in the first direction (+X direction) and / or the second direction (-X direction) of the display engine (305)) may be shortened. Through this, the display engine (305) can be miniaturized.

[0215] According to one embodiment, among the plurality of projection lenses (310), the lens adjacent to the image generation unit (316) may have a negative refractive power. For example, the fifth projection lens (315) may have a negative refractive power. According to one embodiment, as the fourth projection lens (314) has a high refractive index, the light path may be bent significantly. As the fifth projection lens (315) placed between the fourth projection lens (314) and the image generation unit (316) has a negative refractive power, the chief ray angle with respect to the optical axis (OI) may be reduced (e.g., the chief ray angle may become telecentric), and thereby the optical performance of the display engine (305) may be improved.

[0216] According to one embodiment, among the plurality of projection lenses (310), the lens adjacent to the image generating unit (316) may be configured as an aspherical lens. For example, the fifth projection lens (315) may be configured as an aspherical lens. Through this, aberrations (e.g., spherical aberration) amplified by the fourth projection lens (314) having a high refractive index can be reduced, and the principal ray angle (CRA) can be made telecentric.

[0217] According to one embodiment, the projection system (PS) may include an image generation unit (316). The image generation unit (316) may be positioned on the rear side (e.g., the second direction (-X direction) side) of a plurality of projection system lenses (310). The image generation unit (316) may be configured to generate an image by receiving light from an illumination system (IS). For example, the image generation unit (316) may be a liquid crystal on silicon (LCoS) panel.

[0218] According to one embodiment, the image generating unit (316) may include a protective layer (316a). The protective layer (316a) may be disposed on a surface of the image generating unit (316) facing a first direction (+X direction) (e.g., forward). For example, the protective layer (316a) may be attached to a surface of the image generating unit (316) facing the first direction (+X direction). The protective layer (316a) may protect the image generating unit (316).

[0219] According to one embodiment, the display engine (305) may include an illumination system (IS). The illumination system (IS) may be positioned to intersect with the projection system (PS). For example, the illumination system (IS) may be positioned in a third direction (+Y direction) and / or a fourth direction (-Y direction) that intersects with a first direction (+X direction) and / or a second direction (-X direction), which is the direction in which the projection system (PS) is positioned. For example, if the projection system (PS) is positioned to extend in the front-back direction, the illumination system may be positioned in the up-down direction.

[0220] According to one embodiment, the illumination system (IS) may be configured to provide light to the projection system (PS). For example, if the image generation unit (316) of the projection system (PS) is configured as a display module (e.g., LCoS (liquid crystal on silicon)) that generates an image by receiving light from an external source, the illumination system (IS) may be configured to provide light to the image generation unit (316) of the projection system (PS).

[0221] According to one embodiment, the illumination system (IS) may include a first illumination system lens (321). The first illumination system lens (321) may be positioned on the side of the third direction (+Y direction) that intersects the first direction (+X direction) of the light path separator (330). For example, the first illumination system lens (321) may be positioned below the light path separator (330). The first illumination system lens (321) may have a positive refractive power to collect light coming from the light source (323). The first illumination system lens (321) is a lens adjacent to the light source (323) and may include a glass material to have heat resistance against heat generated from the light source (323).

[0222] According to one embodiment, the illumination system (IS) may include a second illumination system lens (322). The second illumination system lens (322) may be positioned on the side of the fourth direction (-Y direction) opposite to the third direction (+Y direction) of the optical path separator (330). For example, the second illumination system lens (322) may be positioned above the optical path separator (330). The second illumination system lens (322) may have a positive refractive power to collect light coming from the light source (323).

[0223] According to one embodiment, the illumination system (IS) may include a light source (323). The light source (323) may be positioned on the third direction (+Y direction) side of the first illumination system lens (321). For example, the light source (323) may be positioned below the first illumination system lens (321). The light source (323) may be configured to generate and irradiate light (P1) to be provided to the projection system (PS). For example, the light source (323) may be an LED light source and may include, but is not limited to, Red, Green, Blue LEDs and White LEDs.

[0224] According to one embodiment, the illumination system (IS) may include a reflective member (324). The reflective member (324) may be positioned on the fourth direction (-Y direction) side of the second illumination system lens (322). For example, the reflective member (324) may be positioned above the second illumination system lens (322). The reflective member (324) may change the path of light (P1) irradiated from a light source (323) and passing through the first illumination system lens (321), the light path separator (330), and the second illumination system lens (322). For example, light (P1) entering in the fourth direction (-Y direction) (e.g., upward) toward the reflective member (324) may be changed to the third direction (+Y direction) (e.g., downward) through the reflective member (324).

[0225] According to one embodiment, the illumination system (IS) may include a fly-eye lens (FEL) (not shown). The fly-eye lens may be positioned between the second illumination system lens (322) and the reflective member (324). The fly-eye lens may have a defined refractive power. The fly-eye lens may include plastic and / or glass materials.

[0226] According to one embodiment, the illumination system (IS) may include a polarizing film (not shown). For example, the polarizing film may include an LP (linear polarizer) film and / or a QWP (quarter-wave plate) film. For example, the LP film may be positioned between the first illumination system lens (321) and the optical path separator (330) (e.g., on the third direction (+Y direction) side of the optical path separator (330)). For example, the QWP film may be positioned between the optical path separator (330) and the second illumination system lens (322) (e.g., on the fourth direction (-Y direction) side of the optical path separator (300)).

[0227] According to one embodiment, the illumination system (IS) may have a structure in which a light source (323), a first illumination system lens (321), a second illumination system lens (322), and a reflective member (324) are arranged sequentially in a fourth direction (-Y direction), but is not limited thereto. For example, unlike as shown in FIG. 8, the illumination system (IS) may have a structure in which a light source (323), a first illumination system lens (321), a second illumination system lens (322), and a reflective member (324) are arranged sequentially in a third direction (+Y direction). According to one embodiment, the illumination system (IS) may include a first illumination system lens (321) and a second illumination system lens (322) between the light source (323) and the reflective member (324), but some of these lenses may be omitted, and additional illumination system lenses may be included.

[0228] According to one embodiment, the display engine (305) may include an optical path separator (330). The optical path separator (330) may be positioned at the intersection of the projection system (PS) and the illumination system (IS). The optical path separator (330) may be configured to allow light (P1) irradiated from the light source (323) of the illumination system (IS) to pass through. For example, at least a portion of the light (P1) irradiated from the light source (323) of the illumination system (IS) may pass through the optical path separator (330) in a fourth direction (-Y direction) (e.g., upward). The optical path separator (330) may be configured to allow the path of light (P2) provided from the illumination system (IS) to enter the projection system (PS). For example, at least a portion of the light (P2) reflected from the reflecting member (324) and traveling in a third direction (+Y direction) (e.g., downward) may be reflected from the light path splitting member (330) and travel in a second direction (-X direction) (e.g., backward) toward the image generating unit (316). The light path splitting member (330) may be composed of a polarizing beam splitter (PBS), a prism, and / or a mirror. For example, the light path splitting member (330) may be understood as a component of a projection system (PS). For example, the projection system (PS) may include the light path splitting member (330). For example, the light path splitting member (330) may be understood as a component of an illumination system (IS). For example, the illumination system (IS) may include the light path splitting member (330).

[0229] According to one embodiment, the optical path separation member (330) may be positioned between any two of the plurality of projection lenses. According to one embodiment, the distance between the optical path separation member (330) and the image generation unit (316) may be greater than the distance between the first projection lens (311) and the optical path separation member (330). For example, the optical path separation member (330) may be understood to be positioned adjacent to the end (e.g., front end) facing the first direction (+X direction) in an arrangement of the plurality of projection lenses (310). Through this, the number of lenses (e.g., second projection lenses (312) to fifth projection lenses (315)) shared by the path of light (P3) whose path is converted in the light path separation member (330) toward the image generation unit (316) and the path of light (P4) containing visual information generated in the image generation unit (316) can be increased, so additional lenses for forming the path of light (P1, P2) in the illumination system (IS) may become unnecessary, and accordingly, the display engine (305) may be miniaturized. For example, as the optical path separation member (330) is positioned towards the rear (e.g., second direction (-X direction)), additional lenses identical to those positioned towards the front (e.g., first direction (+X direction)) of the optical path separation member (330) must be additionally positioned between the optical path separation member (330) and the reflective member (324) to achieve the desired optical performance. Therefore, as the optical path separation member (330) is positioned towards the front (e.g., first direction (+X direction)), the number of additional lenses between the optical path separation member (330) and the reflective member (324) can be minimized, thereby enabling the miniaturization of the display engine (305).

[0230] According to one embodiment, the optical path separation member (330) may be positioned between the first projection lens (311) and the second projection lens (312). Specifically, in order to achieve an appropriate PPD (pixels per degree) (e.g., image quality) of visual information displayed on the transparent member (304), it may be appropriate to maintain the field of view of the light (P4) projected from the display engine (305) at a level below a certain level, and for this purpose, it may be appropriate for the first projection lens (311) and the second projection lens (312) to be spaced apart by a level above a certain level. According to one embodiment, the optical path separation member (330) is positioned as far forward as possible from the projection lens (PS), but is positioned between the first projection lens (311) and the second projection lens (312), which are inevitably spaced apart to achieve a field of view below a certain level, thereby effectively achieving miniaturization of the display engine (305).

[0231] According to one embodiment, a lens adjacent to the second direction (-X direction) (e.g., rear) side of the optical path separation member (330) may have a negative refractive power. For example, if the optical path separation member (330) is positioned between the first projection lens (311) and the second projection lens (312), the second projection lens (312) may have a negative refractive power.

[0232] According to one embodiment, the display engine (305) may include a film (340). The film (340) may be disposed on a surface of the optical path separator (330) facing a second direction (-X direction) (e.g., rear). In one embodiment, the film (340) may be adjacent to the surface of the optical path separator (330) facing the second direction (-X direction). In one embodiment, the film (340) may be attached to the surface of the optical path separator (330) facing the second direction (-X direction). For example, the film (340) may be composed of a filter for improving light efficiency.

[0233] According to one embodiment, the display engine (305) may include an aperture (STO). The aperture (STO) may be positioned on the first direction (+X direction) (e.g., forward) side of the first projection lens (311). The aperture (STO) may be configured to control the amount of light (P4) passing through the aperture (STO).

[0234] According to one embodiment, the display engine (305) may include an optical path conversion member (not shown). The optical path conversion member may be positioned on the first direction (+X direction) (e.g., forward) side of the aperture (STO) and on the second direction (-X direction) (e.g., rear) side of the aperture (STO). The optical path conversion member may be configured to adjust the path of light (P4) projected from the projection system (PS) toward the transparent member (304) (e.g., wave guide). In one embodiment, the optical path conversion member may not be provided.

[0235] The process of light (P1, P2, P3, P4) being emitted from a display engine (305) according to one embodiment may be as follows. At least a portion of the light (P1) irradiated from the light source (323) may travel in a fourth direction (-Y direction) (e.g., upward). At least a portion of the light (P1) irradiated from the light source (323) may reach a reflective member (324) after passing through a first illumination lens (321), an optical path separator (330), and a second illumination lens (322). At least a portion of the light (P1) that reaches the reflective member (324) may be reflected by the reflective member (324) and travel in a third direction (+Y direction) (e.g., downward). At least a portion of the light (P2) reflected by the reflective member (324) may reach an optical path separator (330) after passing through the second illumination lens (322). At least a portion of the path of the light (P2) reaching the optical path separation member (330) can be diverted by the optical path separation member (330) to face a second direction (-X direction) (e.g., rear). At least a portion of the light (P3) reflected from the optical path separation member (330) can proceed in the second direction (-X direction) (e.g., rear). At least a portion of the light (P3) reflected from the optical path separation member (330) can reach the image generation unit (316) after passing through the second projection lens (312), the third projection lens (313), the fourth projection lens (314), and the fifth projection lens (315). The image generation unit (316) can receive the light (P3) and generate visual information (e.g., images and / or videos). At least a portion of the light (P4) containing visual information generated in the image generation unit (316) can travel in a first direction (+X direction) (e.g., forward).At least a portion of the light (P4) irradiated from the image generation unit (316) can be projected from the display engine (305) toward a transparent member (304) (e.g., wave guide) after passing through the fifth projection lens (315), the fourth projection lens (314), the third projection lens (313), the second projection lens (312), the light path separation member (330) and / or the first projection lens (311).

[0236] According to one embodiment, the projection system (PS) can satisfy the following [Equation 1].

[0237] [Equation 1]

[0238] Fno < 2.1

[0239] Here, Fno in [Equation 1] can be the F-number of the projection system (PS).

[0240] According to one embodiment, [Equation 1] may mean that the brightness of the light (P4) projected from the display engine (305) can be secured above a certain level by having a large aperture of the projection system (PS).

[0241] According to one embodiment, the projection system (PS) can satisfy the following [Equation 2].

[0242] [Equation 2]

[0243] FOV < 40 deg.

[0244] Here, the FOV of [Equation 2] may be the field of view of the display engine (305).

[0245] According to one embodiment, [Equation 2] may mean that light (P4) containing visual information projected from the display engine (305) has a viewing angle below a certain level, thereby maintaining the PPD of the visual information displayed on the transparent member (304) above an appropriate level.

[0246] According to one embodiment, the projection system (PS) can satisfy the following [Equation 3].

[0247] [Equation 3]

[0248] CRA < 15 deg.

[0249] Here, CRA of [Equation 3] may be the angle of the principal ray incident on the plurality of projection lenses (310) in the image generation unit (316).

[0250] According to one embodiment, [Equation 3] may mean that as the angle of the main beam becomes 15 degrees or less, the optical performance of the display engine (305) (or projection system (PS)) can be secured at a certain level or higher.

[0251] According to one embodiment, the projection system (PS) can satisfy the following [Equation 4].

[0252] [Equation 4]

[0253] 0.8 ≤ f1 / f ≤ 1.0

[0254] Here, f1 is the effective focal length of the first projection lens (311), and f may be the combined effective focal length of the plurality of projection lenses (310).

[0255] According to one embodiment, [Equation 4] may mean that the optical performance of the display engine (305) (or projection system (PS)) is secured at a certain level or higher by setting the effective focal length of the first projection system lens (311) and the combined effective focal length of the plurality of projection system lenses (310) constituting the projection system (PS) to be similar. For example, if the ratio of the effective focal length of the first projection system lens (311) to the combined effective focal length of the plurality of projection system lenses (310) constituting the projection system (PS) is 0.8 or less, the refractive index of the first projection system lens (311), which plays a major role in correcting optical aberrations, becomes too strong, and a lot of optical aberrations may occur. For example, if the ratio of the effective focal length of the first projection lens (311) to the combined effective focal length of the plurality of projection lenses (310) constituting the projection system (PS) is 1.0 or greater, the refractive index of the first projection lens (311) becomes too weak, and a large amount of optical aberration may occur. According to one embodiment, as the display engine (305) (or projection system (PS)) satisfies [Equation 4], the refractive index of the first projection lens (311) may be set to minimize optical aberration.

[0256] According to one embodiment, the projection system (PS) can satisfy the following [Equation 5].

[0257] [Equation 5]

[0258] 0.1 ≤ IMH (image height) / OPL (optical path length) ≤ 0.3

[0259] Here, IMH may be the length between the center of the image generating unit (316) and the outermost edge of the image generating unit (316). OPL may be the distance between the first direction (+X direction) side end of the first surface (S2) facing the first direction (+X direction) of the lens (e.g., the first projection lens (311)) positioned at the first direction (+X direction) side end of the plurality of projection lenses (310) and the image generating unit (316). For example, OPL may be the distance between the image generating unit (316) and the end facing the first direction (+X direction) of the plurality of projection lenses (310), measured along the optical axis (OI). For example, OPL may be smaller than TTL (total track length), which is the distance between the aperture (STO) and the image generating unit (316).

[0260] According to one embodiment, [Equation 5] may mean that by setting an appropriate ratio between IMH and OPL, it is possible to achieve miniaturization of the display engine (305) while securing optical performance above a certain level. For example, if the IMH / OPL value is less than 0.1, the length of the projection system (PS) becomes longer, making it difficult to achieve miniaturization of the display engine (305). For example, if the IMH / OPL value is greater than 0.3, even if miniaturization of the display engine (305) can be achieved, the distance between the first projection system lens (311) to the fifth projection system lens (315) becomes shorter, making it difficult to secure sufficient optical performance and achieve a viewing angle below a certain level.

[0261] According to one embodiment, the display engine (305) and / or projection system (PS) may satisfy all of the above-described [Equation 1], [Equation 2], [Equation 3], [Equation 4] and [Equation 5], or at least one of the above-described [Equation 1], [Equation 2], [Equation 3], [Equation 4] or [Equation 5].

[0262] [Table 1] below describes various lens data of a plurality of projection system lenses and an optical path separation member (330) of a projection system (PS). In the projection system (PS) of the display engine (305) according to one embodiment of the present disclosure, light containing visual information generated by the image generation unit (316) is configured to be emitted from the second direction (-X direction) side to the first direction (+X direction), but when measuring various lens data of a plurality of projection system lenses and an optical path separation member (330) of the projection system (PS), the path of the light may be reversed. [Table 1] describes various lens data assuming a case where, based on FIG. 9, light flows from the first direction (+X direction) side (e.g., the virtual object ((obj) side) to the second direction (-X direction) and an image is formed in the image generation unit (316).

[0263] In [Table 1], 'obj' may refer to a virtual object. In [Table 1], 'sto' refers to an aperture (STO), and the aperture (STO) may be positioned on the first direction (+X direction) side (e.g., front) of the first projection lens (311). 'radius' may refer to the radius of curvature of the lens, 'thickness' to the thickness of the lens or the air gap, 'nd' to the refractive index of the medium (e.g., lens), and 'vd' to the Abbe's number of the lens. The radius of curvature may represent, for example, a value indicating the degree of curvature at each point of a curved surface or curve. S2 and S3 may refer to the surface of the first projection lens (311) facing the first direction (+X direction) and the surface of the first projection lens (311) facing the second direction (-X direction), respectively. S4 may refer to the surface of the optical path separation member (330) facing the first direction (+X direction). S5 may refer to the surface of the optical path separation member (330) facing the second direction (-X direction) and the surface of the film (340) facing the first direction (+X direction). S6 may refer to the surface of the film (340) facing the second direction (-X direction). S7 and S8 may refer to the surface of the second projection lens (312) facing the first direction (+X direction) and the surface of the second projection lens (312) facing the second direction (-X direction), respectively. S9 and S10 may refer to the surface of the third projection lens (313) facing the first direction (+X direction) and the surface of the third projection lens (313) facing the second direction (-X direction), respectively. S11 and S12 may each represent a surface facing the first direction (+X direction) of the fourth projection lens (314) and a surface facing the second direction (-X direction) of the fourth projection lens (314). S13 and S14 may each represent a surface facing the first direction (+X direction) of the fifth projection lens (315) and a surface facing the second direction (-X direction) of the fifth projection lens (315).S15 may refer to a surface of the protective layer (316a) facing the first direction (+X direction), and S16 may refer to a surface of the protective layer (316a) facing the second direction (-X direction). img may refer to a surface of the image generating unit (316) facing the first direction (+X direction). In [Table 1], parts marked with the symbol '*', such as 'S11*, S12*, S13*, S14*', may refer to the surface of a lens to which an aspherical surface is applied.

[0264] [Table 1] may relate to a display engine (305) having a composite effective focal length (EFL) of 8.101 mm, Fno of 2.025, an optical path length (OPL) of 12.701 mm, an image height (IMH) of 2.189 mm, a field of view (FOV) of 30.18 degrees, a conditional equation value according to [Equation 4] of 0.875, and a conditional equation value according to [Equation 5] of 0.172.

[0265] SurfRadiusThickndvdobjinfinityinfinitystoinfinity1.40000S25.211000.983001.7349354.68S3infinity0.10000S4in finity4.320001.5876240.75S5infinity0.119001.5202864.17S6infinity0.58900S7-4.000000.500001.9687817.98S884.0 00000.64800S9-4.728000.746001.9161931.31S10-3.860000.10000S11*5.143571.950001.8173840.97S12*-5.657310.806 00S13*-1.503320.790001.5476156.04S14*-2.813970.35000S15infinity0.700001.5202864.17S16infinity0imginfinity0

[0266] Table 2 below lists the aspheric coefficients of the aspheric lenses in Table 1 above, and the aspheric coefficients can be calculated through the following Equation 6.

[0267] [Equation 6]

[0268]

[0269] Here, 'z' represents the distance from the vertex of the lens in the direction of the optical axis (OI), 'c'' represents the reciprocal of the radius of curvature at the vertex of the lens, 'y' represents the distance in the direction perpendicular to the optical axis, 'K' represents the conic constant, and 'A', 'B', 'C', 'D', 'E', and 'F' represent the aspherical coefficients, respectively. 'ASP' in [Table 2] below may represent an aspherical surface.

[0270] Surf11_ASP12_ASP13_ASP14_ASPRadius5.14357E+00-5.65731E+00-1.50332E+00-2.81397E+00K(Conic)-1.18495E+006.86756E-02-2.5 4444E+00-9.80988E+00A(4th) / C4-1.63912E-03-1.41177E-031.12008E-035.46347E-03B(6th) / C54.22755E-041.12906E-033.00685E-0 3-1.91987E-04C(8th) / C6-6.78614E-05-1.45038E-04-8.09076E-043.35265E-04D(10th) / C72.80691E-065.97432E-061.06325E-04-7.0 3930E-05E(12th) / C80.00000E+000.00000E+00-8.21456E-062.67940E-06F(14th) / C90.00000E+000.00000E+002.79343E-078.91729E-08

[0271] FIG. 10 is a graph showing the spherical aberration of a lens assembly (e.g., a plurality of projection lenses (310)) and an optical path separator (330) constituting a projection system (PS) according to one embodiment of the present disclosure (e.g., the embodiment of FIG. 9). Spherical aberration may be a phenomenon in which the focal point of light passing through different parts of a lens (e.g., a chief portion and a marginal portion) changes. In FIG. 10, the horizontal axis represents the degree of longitudinal spherical aberration, and the vertical axis represents the distance from the center of the optical axis normalized, so that the change in longitudinal spherical aberration according to the wavelength of light may be illustrated. Longitudinal spherical aberration can be shown for light with wavelengths of approximately 638.3000 nm (nanometer), approximately 518.0000 nm, or approximately 448.0000 nm, respectively. Looking at FIG. 10, it can be seen that the longitudinal spherical aberration of the lens assembly according to various embodiments of the present disclosure in the visible light band is limited to within approximately +0.025 to -0.025, showing stable optical characteristics. FIG. 11 is a graph showing the astigmatism of a lens assembly (e.g., a plurality of projection lenses (310)) and an optical path separator (330) constituting a projection system (PS) according to one embodiment (e.g., the embodiment of FIG. 9). Astigmatism may occur when the tangential plane (or meridian plane) and the sagittal plane of a lens have different radii, causing the focal points of light passing through the vertical and horizontal directions to be misaligned.

[0272] Here, the astigmatism of the lens assembly is a result obtained at a wavelength of approximately 518.0000 nm, where the dashed line (Y) represents astigmatism in the direction of the tangential plane (e.g., tangential plane curvature), and the solid line (X) represents astigmatism in the direction of the sagittal plane (e.g., sagittal plane curvature). As can be seen from the graph, according to various embodiments of the present disclosure, the astigmatism is limited to within approximately +0.025 to -0.025, and stable optical characteristics are observed.

[0273] FIG. 12 is a graph showing distortion of a lens assembly (e.g., a plurality of projection lenses (310)) and an optical path separator (330) constituting a projection system (PS) according to one embodiment (e.g., the embodiment of FIG. 9). Distortion occurs because the optical magnification changes depending on the distance from the optical axis, and the image formed on the actual image plane (img) may appear larger or smaller than the image formed on the theoretical image plane (img).

[0274] The distortion of the lens assembly is a result obtained at a wavelength of approximately 518.0000 nm, and the image captured through the lens assembly may have distortion at points (e.g., the periphery) that are off from the optical axis. However, such distortion is of a degree that can generally occur in optical devices using lenses, and the projection system (PS) and optical path separation member (330) according to one embodiment (e.g., the embodiment of FIG. 9) can provide good optical characteristics with a distortion rate of approximately less than 1.00%.

[0275] FIG. 13 illustrates a cross-sectional view and an optical path of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 14 is a graph showing spherical aberration of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 15 is a graph showing astigmatism of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 16 is a graph showing distortion aberration of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0276] Specifically, FIG. 13 illustrates the arrangement of a projection system (PS) and an optical path separation member (430) and an optical path passing through them. FIG. 14 is a graph showing the spherical aberration of the projection system (PS) and the optical path separation member (430) shown in FIG. 13. FIG. 15 is a graph showing the astigmatism of the projection system (PS) and the optical path separation member (430) shown in FIG. 13. FIG. 16 is a graph showing the distortion aberration of the projection system (PS) and the optical path separation member (430) shown in FIG. 13.

[0277] The detailed configuration of the wearable electronic device (401) not described below may be the same or similar as the detailed configuration of the electronic device (101) described in relation to FIG. 1, the detailed configuration of the wearable electronic device (101) described in relation to FIG. 2 to FIG. 6, and / or the detailed configuration of the wearable electronic device (301) described in relation to FIG. 7 to FIG. 12. The detailed configuration of the display engine (405) not described below may be the same or similar as the detailed configuration of the light output module (1011) described in relation to FIG. 2, the detailed configuration of the light output module (211) described in relation to FIG. 5, and / or the detailed configuration of the display engine (305) described in relation to FIG. 6 to FIG. 12.

[0278] According to one embodiment, a plurality of projection lenses (410) may include a fourth projection lens (414). The fourth projection lens (414) may be composed of a spherical lens. According to one embodiment, the fourth projection lens (414) may include a glass material.

[0279] According to one embodiment, a plurality of projection lenses (410) may include a fifth projection lens (415). The fifth projection lens (415) may be composed of an aspherical lens. According to one embodiment, the fifth projection lens (415) may include a plastic material.

[0280] Table 3 below describes various lens data of a plurality of projection lenses (410) and an optical path separation member (430) of a projection system (PS). In the projection system (PS) of the display engine (405) according to one embodiment of the present disclosure, light containing visual information generated by the image generation unit (416) is configured to be emitted from the second direction (-X direction) side to the first direction (+X direction), but when measuring various lens data of a plurality of projection lenses (410) and an optical path separation member (430) of the projection system (PS), the path of the light may be reversed. Table 3 assumes a case where, based on FIG. 13, light flows from the first direction (+X direction) side (e.g., the virtual object ((obj) side) to the second direction (-X direction) and an image is formed in the image generation unit (416).

[0281] In [Table 3], 'obj' may mean a subject. In [Table 3], 'sto' may mean an aperture (STO), and the aperture (STO) may be positioned on the first direction (+X direction) side (e.g., front) of the first projection lens (411). 'radius' may mean the radius of curvature of the lens, 'thickness' may mean the thickness of the lens or the air gap, 'nd' may mean the refractive index of the medium (e.g., lens), and 'vd' may mean the Abbe's number of the lens. The radius of curvature may represent, for example, a value indicating the degree of curvature at each point of a curved surface or curve. S2 and S3 may mean the surface facing the first direction (+X direction) of the first projection lens (411) and the surface facing the second direction (-X direction) of the first projection lens (411), respectively. S4 may refer to the surface of the optical path separation member (430) facing the first direction (+X direction). S5 may refer to the surface of the optical path separation member (430) facing the second direction (-X direction) and the surface of the film (440) facing the first direction (+X direction). S6 may refer to the surface of the film (440) facing the second direction (-X direction). S7 and S8 may refer to the surface of the second projection lens (412) facing the first direction (+X direction) and the surface of the second projection lens (412) facing the second direction (-X direction), respectively. S9 and S10 may refer to the surface of the third projection lens (413) facing the first direction (+X direction) and the surface of the third projection lens (413) facing the second direction (-X direction), respectively. S11 and S12 may each represent a surface facing the first direction (+X direction) of the fourth projection lens (414) and a surface facing the second direction (-X direction) of the fourth projection lens (414). S13 and S14 may each represent a surface facing the first direction (+X direction) of the fifth projection lens (415) and a surface facing the second direction (-X direction) of the fifth projection lens (415).S15 may refer to a surface of the protective layer (416a) facing the first direction (+X direction), and S16 may refer to a surface of the protective layer (416a) facing the second direction (-X direction). img may refer to a surface of the image generating unit (416) facing the first direction (+X direction). In [Table 3], parts marked with the symbol '*', such as 'S13*, S14*', may refer to the surface of a lens to which an aspherical surface is applied.

[0282] [Table 3] may relate to a display engine (405) having a composite effective focal length (EFL) of 8.1 mm, Fno of 1.737, OPL (Optical path length) of 12.6 mm, IMH (image height) of 2.189 mm, FOV of 30.22 degrees, a value of the conditional equation according to [Equation 4] of 0.899, and a value of the conditional equation according to [Equation 5] of 0.174.

[0283] SurfRadiusThickndvdobjinfinityinfinity stoinfinity1.40000 S25.351261.010341.7349354.68S3infinity0.10000 S4infinity4.320001.5810241.5S5infinity0.100001.5202864.17S6infinity0.61759 S7-4.096500.400001.9687817.98S8-49.914440.79922 S9-3.699370.820051.8114946.56S10-3.370290.16160 S114.713491.783131.8603240.05S12-18.000741.08805 S13*-2.733250.350001.5484056.09S14*-10.371460.30003 S15infinity0.700001.5202864.17S16infinity0.05 imginfinity0

[0284] Table 4 below lists the aspheric coefficients of the aspheric lenses in Table 3 above, and the aspheric coefficients can be calculated through Equation 6 described above.

[0285] Surf13_ASP14_ASPRadius-2.73325E+00-1.03715E+01K(Conic)-3.31821E-013. 28809E+00A(4th) / C4-4.13176E-02-5.32019E-02B(6th) / C52.39476E-022.1869 1E-02C(8th) / C6-5.11100E-03-3.72574E-03D(10th) / C76.12249E-043.38146E- 04E(12th) / C8-3.93059E-05-1.53645E-05F(14th) / C91.07578E-062.50561E-07

[0286] FIG. 14 is a graph showing the spherical aberration of a lens assembly (e.g., a plurality of projection lenses (410)) and an optical path separating member (430) constituting a projection system (PS) according to one embodiment of the present disclosure (e.g., the embodiment of FIG. 13). In FIG. 14, the horizontal axis represents the degree of longitudinal spherical aberration, and the vertical axis represents the distance from the center of the optical axis normalized, so that the change in longitudinal spherical aberration according to the wavelength of light can be illustrated. Longitudinal spherical aberration can be shown for light with wavelengths of, for example, approximately 638.3000 nm (nanometer), approximately 518.0000 nm, or approximately 448.0000 nm, respectively. Looking at FIG. 14, it can be seen that the longitudinal spherical aberration of the lens assembly according to various embodiments of the present disclosure in the visible light band is limited to approximately +0.025 to -0.025, showing stable optical characteristics. FIG. 15 is a graph showing the astigmatism of a lens assembly (e.g., a plurality of projection lenses (410)) and an optical path separator (430) constituting a projection system (PS) according to one embodiment (e.g., the embodiment of FIG. 13).

[0287] Here, the astigmatism of the lens assembly is a result obtained at a wavelength of approximately 518.0000 nm, where the dashed line (Y) represents astigmatism in the direction of the tangential plane (e.g., tangential plane curvature), and the solid line (X) represents astigmatism in the direction of the sagittal plane (e.g., sagittal plane curvature). As can be seen from the graph, according to various embodiments of the present disclosure, the astigmatism is limited to within approximately +0.025 to -0.025, and stable optical characteristics are observed.

[0288] FIG. 16 is a graph showing the distortion of a lens assembly (e.g., a plurality of projection lenses (410)) and an optical path separation member (430) constituting a projection system (PS) according to one embodiment (e.g., the embodiment of FIG. 13).

[0289] The distortion of the lens assembly is a result obtained at a wavelength of approximately 518.0000 nm, and the image captured through the lens assembly may have distortion at points (e.g., the periphery) that are off from the optical axis. However, such distortion is of a degree that can generally occur in optical devices using lenses, and the projection system (PS) and optical path separation member (430) according to one embodiment (e.g., the embodiment of FIG. 13) can provide good optical characteristics with a distortion rate of approximately less than 1.00%.

[0290] FIG. 17 illustrates a cross-sectional view and an optical path of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 18 is a graph showing spherical aberration of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 19 is a graph showing astigmatism of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 20 is a graph showing distortion aberration of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0291] Specifically, FIG. 17 illustrates the arrangement of a projection system (PS) and an optical path separation member (530) and an optical path passing through them. FIG. 18 is a graph showing the spherical aberration of the projection system (PS) and the optical path separation member (530) shown in FIG. 17. FIG. 19 is a graph showing the astigmatism of the projection system (PS) and the optical path separation member (530) shown in FIG. 17. FIG. 20 is a graph showing the distortion aberration of the projection system (PS) and the optical path separation member (530) shown in FIG. 17.

[0292] The detailed configuration of the wearable electronic device (501) not described below may be the same or similar to the detailed configuration of the electronic device (101) described in relation to FIG. 1, the detailed configuration of the wearable electronic device (101) described in relation to FIG. 2 to FIG. 6, the detailed configuration of the wearable electronic device (301) described in relation to FIG. 7 to FIG. 12, and / or the detailed configuration of the wearable electronic device (401) described in relation to FIG. 13 to FIG. 16. The detailed configuration of the display engine (505) not described below may be the same or similar to the detailed configuration of the light output module (1011) described in relation to FIG. 2, the detailed configuration of the light output module (211) described in relation to FIG. 5, the detailed configuration of the display engine (305) described in relation to FIG. 6 to FIG. 12, and / or the detailed configuration of the display engine (405) described in relation to FIG. 13 to FIG. 16.

[0293] According to one embodiment, a plurality of projection lenses (510) may include a fourth projection lens (514). The fourth projection lens (514) may be composed of a spherical lens. According to one embodiment, the fourth projection lens (514) may include a glass material.

[0294] According to one embodiment, a plurality of projection lenses (510) may include a fifth projection lens (515). The fifth projection lens (515) may be composed of an aspherical lens. According to one embodiment, the fifth projection lens (515) may include a glass material.

[0295] Table 5 below describes various lens data of a plurality of projection lenses (510) and an optical path separation member (530) of a projection system (PS). In the projection system (PS) of the display engine (505) according to one embodiment of the present disclosure, light containing visual information generated by the image generation unit (516) is configured to be emitted from the second direction (-X direction) side to the first direction (+X direction), but when measuring various lens data of a plurality of projection lenses (510) and an optical path separation member (530) of the projection system (PS), the path of the light may be reversed. Table 5 assumes a case where, based on FIG. 17, light flows from the first direction (+X direction) side (e.g., the virtual object ((obj) side) to the second direction (-X direction) and an image is formed in the image generation unit (516).

[0296] In [Table 5], 'obj' may mean a subject. In [Table 5], 'sto' may mean an aperture (STO), and the aperture (STO) may be positioned on the first direction (+X direction) side (e.g., front) of the first projection lens (511). 'radius' may mean the radius of curvature of the lens, 'thickness' may mean the thickness of the lens or the air gap, 'nd' may mean the refractive index of the medium (e.g., lens), and 'vd' may mean the Abbe's number of the lens. The radius of curvature may represent, for example, a value indicating the degree of curvature at each point of a curved surface or curve. S2 and S3 may mean the surface facing the first direction (+X direction) of the first projection lens (511) and the surface facing the second direction (-X direction) of the first projection lens (511), respectively. S4 may refer to the surface of the optical path separation member (530) facing the first direction (+X direction). S5 may refer to the surface of the optical path separation member (530) facing the second direction (-X direction) and the surface of the film (540) facing the first direction (+X direction). S6 may refer to the surface of the film (540) facing the second direction (-X direction). S7 and S8 may refer to the surface of the second projection lens (512) facing the first direction (+X direction) and the surface of the second projection lens (512) facing the second direction (-X direction), respectively. S9 and S10 may refer to the surface of the third projection lens (513) facing the first direction (+X direction) and the surface of the third projection lens (513) facing the second direction (-X direction), respectively. S11 and S12 may each represent a surface facing the first direction (+X direction) of the fourth projection lens (514) and a surface facing the second direction (-X direction) of the fourth projection lens (514). S13 and S14 may each represent a surface facing the first direction (+X direction) of the fifth projection lens (515) and a surface facing the second direction (-X direction) of the fifth projection lens (515).S15 may refer to a surface of the protective layer (516a) facing the first direction (+X direction), and S16 may refer to a surface of the protective layer (516a) facing the second direction (-X direction). img may refer to a surface of the image generating unit (516) facing the first direction (+X direction). In [Table 5], parts marked with the symbol '*', such as 'S13*, S14*', may refer to the surface of a lens to which an aspherical surface is applied.

[0297] [Table 5] may relate to a display engine (505) in which the combined effective focal length (EFL) is 8.1 mm, Fno is 2.025, OPL (Optical path length) is 12.6 mm, IMH (image height) is 2.189 mm, FOV is 30.22 degrees, the value of the conditional equation according to [Equation 4] is 0.857, and the value of the conditional equation according to [Equation 5] is 0.174.

[0298] SurfRadiusThickndvdobjinfinityinfinity stoinfinity1.40000 S25.100510.924051.7349354.68S3infinity0.10000 S4infinity4.320001.5810241.5S5infinity0.100001.5202864.17S6infinity0.58605 S7-3.715880.400001.9687817.98S8230.616720.67122 S9-4.663981.139821.8436937.34S10-3.611470.10000 S114.378311.773871.8436937.34S12-43.179471.07063 S13*-3.005090.350001.7486349.25S14*-6.831840.30033 S15infinity0.700001.5202864.17S16infinity0.06403 imginfinity0

[0299] Table 6 below lists the aspheric coefficients of the aspheric lenses in Table 5 above, and the aspheric coefficients can be calculated through the aforementioned Equation 6.

[0300] Surf13_ASP14_ASPRadius-3.00509E+00-6.83184E+00K(Conic)-9.69983E-02-1 .98588E+00A(4th) / C4-3.88681E-02-5.17824E-02B(6th) / C52.67582E-022.646 14E-02C(8th) / C6-6.57687E-03-5.71588E-03D(10th) / C79.08554E-046.84783E -04E(12th) / C8-6.73909E-05-4.39855E-05F(14th) / C92.12667E-061.16270E-06

[0301] FIG. 18 is a graph showing the spherical aberration of a lens assembly (e.g., a plurality of projection lenses (510)) and an optical path separating member (530) constituting a projection system (PS) according to one embodiment of the present disclosure (e.g., the embodiment of FIG. 17). In FIG. 18, the horizontal axis represents the degree of longitudinal spherical aberration, and the vertical axis represents the distance from the center of the optical axis normalized, so that the change in longitudinal spherical aberration according to the wavelength of light can be illustrated. Longitudinal spherical aberration can be shown for light with wavelengths of, for example, approximately 638.3000 nm (nanometer), approximately 518.0000 nm, or approximately 448.0000 nm, respectively. Looking at FIG. 18, it can be seen that the longitudinal spherical aberration of the lens assembly according to various embodiments of the present disclosure in the visible light band is limited to approximately +0.025 to -0.025, showing stable optical characteristics. FIG. 19 is a graph showing the astigmatism of a lens assembly (e.g., a plurality of projection lenses (510)) and an optical path separator (530) constituting a projection system (PS) according to one embodiment (e.g., the embodiment of FIG. 17).

[0302] Here, the astigmatism of the lens assembly is a result obtained at a wavelength of approximately 518.0000 nm, where the dashed line (Y) represents astigmatism in the direction of the tangential plane (e.g., tangential plane curvature), and the solid line (X) represents astigmatism in the direction of the sagittal plane (e.g., sagittal plane curvature). As can be seen from the graph, according to various embodiments of the present disclosure, the astigmatism is limited to within approximately +0.025 to -0.025, and stable optical characteristics are observed.

[0303] FIG. 20 is a graph showing the distortion of a lens assembly (e.g., a plurality of projection lenses (510)) and an optical path separation member (530) constituting a projection system (PS) according to one embodiment (e.g., the embodiment of FIG. 17).

[0304] The distortion of the lens assembly is a result obtained at a wavelength of approximately 518.0000 nm, and the image captured through the lens assembly may have distortion at points (e.g., the periphery) that are off from the optical axis. However, such distortion is of a degree that can generally occur in optical devices using lenses, and the projection system (PS) and optical path separation member (530) according to one embodiment (e.g., the embodiment of FIG. 17) can provide good optical characteristics with a distortion rate of approximately less than 1.00%.

[0305] FIG. 21 illustrates a cross-sectional view and an optical path of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 22 is a graph showing spherical aberration of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 23 is a graph showing astigmatism of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 24 is a graph showing distortion aberration of a part of a wearable electronic device according to one embodiment of the present disclosure.

[0306] Specifically, FIG. 21 illustrates the arrangement of a projection system (PS) and an optical path separation member (630) and an optical path passing through them. FIG. 22 is a graph showing the spherical aberration of the projection system (PS) and the optical path separation member (630) shown in FIG. 21. FIG. 23 is a graph showing the astigmatism of the projection system (PS) and the optical path separation member (630) shown in FIG. 21. FIG. 24 is a graph showing the distortion aberration of the projection system (PS) and the optical path separation member (630) shown in FIG. 21.

[0307] The detailed configuration of the wearable electronic device (601) not described below may be identical or similar to the detailed configuration of the electronic device (101) described in relation to FIG. 1, the detailed configuration of the wearable electronic device (101) described in relation to FIG. 2 to FIG. 6, the detailed configuration of the wearable electronic device (301) described in relation to FIG. 7 to FIG. 12, the detailed configuration of the wearable electronic device (401) described in relation to FIG. 13 to FIG. 16, and / or the detailed configuration of the wearable electronic device (501) described in relation to FIG. 17 to FIG. 20. The detailed configuration of the display engine (605) not described below may be the same or similar to the detailed configuration of the light output module (1011) described in relation to FIG. 2, the detailed configuration of the light output module (211) described in relation to FIG. 5, the detailed configuration of the display engine (305) described in relation to FIG. 6 to FIG. 12, the detailed configuration of the display engine (405) described in relation to FIG. 13 to FIG. 16, and / or the detailed configuration of the display engine (505) described in relation to FIG. 17 to FIG. 20.

[0308] According to one embodiment, a plurality of projection lenses (610) may include a fourth projection lens (614). The fourth projection lens (614) may be composed of an aspherical lens. According to one embodiment, the fourth projection lens (614) may include a glass material.

[0309] According to one embodiment, a plurality of projection lenses (610) may include a fifth projection lens (615). The fifth projection lens (615) may be composed of an aspherical lens. According to one embodiment, the fifth projection lens (615) may include a glass material.

[0310] [Table 7] below describes various lens data of a plurality of projection system lenses (610) and an optical path separation member (630) of a projection system (PS). In the projection system (PS) of the display engine (605) according to one embodiment of the present disclosure, light containing visual information generated by the image generation unit (616) is configured to be emitted from the second direction (-X direction) side to the first direction (+X direction), but when measuring various lens data of a plurality of projection system lenses (610) and an optical path separation member (630) of the projection system (PS), the path of the light may be reversed. [Table 7] assumes a case where, based on FIG. 21, light flows from the first direction (+X direction) side (e.g., the virtual object ((obj) side) to the second direction (-X direction) and an image is formed in the image generation unit (616).

[0311] In [Table 7], 'obj' may mean a subject. In [Table 7], 'sto' may mean an aperture (STO), and the aperture (STO) may be positioned on the first direction (+X direction) side (e.g., front) of the first projection lens (611). 'radius' may mean the radius of curvature of the lens, 'thickness' may mean the thickness of the lens or the air gap, 'nd' may mean the refractive index of the medium (e.g., lens), and 'vd' may mean the Abbe's number of the lens. The radius of curvature may represent, for example, a value indicating the degree of curvature at each point of a curved surface or curve. S2 and S3 may mean the surface facing the first direction (+X direction) of the first projection lens (611) and the surface facing the second direction (-X direction) of the first projection lens (611), respectively. S4 may refer to the surface of the optical path separation member (630) facing the first direction (+X direction). S5 may refer to the surface of the optical path separation member (630) facing the second direction (-X direction) and the surface of the film (640) facing the first direction (+X direction). S6 may refer to the surface of the film (640) facing the second direction (-X direction). S7 and S8 may refer to the surface of the second projection lens (612) facing the first direction (+X direction) and the surface of the second projection lens (612) facing the second direction (-X direction), respectively. S9 and S10 may refer to the surface of the third projection lens (613) facing the first direction (+X direction) and the surface of the third projection lens (613) facing the second direction (-X direction), respectively. S11 and S12 may each represent a surface facing the first direction (+X direction) of the fourth projection lens (614) and a surface facing the second direction (-X direction) of the fourth projection lens (614). S13 and S14 may each represent a surface facing the first direction (+X direction) of the fifth projection lens (615) and a surface facing the second direction (-X direction) of the fifth projection lens (615).S15 may refer to a surface of the protective layer (616a) facing the first direction (+X direction), and S16 may refer to a surface of the protective layer (616a) facing the second direction (-X direction). img may refer to a surface of the image generating unit (616) facing the first direction (+X direction). In [Table 7], parts marked with the symbol '*', such as 'S13*, S14*', may refer to the surface of a lens to which an aspherical surface is applied.

[0312] [Table 7] may relate to a display engine (605) in which the combined effective focal length (EFL) is 8.1 mm, Fno is 2.025, OPL (Optical path length) is 12.7 mm, IMH (image height) is 2.189 mm, FOV is 30.04 degrees, the value of the conditional equation according to [Equation 4] is 0.879, and the value of the conditional equation according to [Equation 5] is 0.172.

[0313] SurfRadiusThickndvdobjinfinityinfinity stoinfinity1.40000 S25.230760.979961.7349354.68S3infinity0.10000 S4infinity4.320001.5810241.5S5infinity0.100001.5202864.17S6infinity0.58059 S7-4.052070.500001.9687817.98S896.201960.69549 S9-4.336390.763231.9161931.31S10-3.671370.10000 S11*4.596631.941151.8173840.97S12*-8.450570.95415 S13*-1.508280.608071.7486349.25S14*-2.172640.30000 S15infinity0.700001.5202864.17S16infinity0.05736 imginfinity0

[0314] Table 8 below lists the aspheric coefficients of the aspheric lenses in Table 7 above, and the aspheric coefficients can be calculated through Equation 6 described above.

[0315] Surf11_ASP12_ASP13_ASP14_ASPRadius4.59663E+00-8.45057E+00-1.50828E+00-2.17264E+00K(Conic)-8.57298E-011. 73544E+00-1.64463E+00-4.60649E+00A(4th) / C4-8.14098E-04-1.97177E-031.93155E-02-5.12562E-04B(6th) / C53.7828 7E-041.04573E-03-3.85684E-043.72314E-03C (8th) / C6-6.36314E-05-1.54631E-04-3.22240E-04-5.60668E-04D (10th) / C75.71312E-061.12407E-053.79877E-052.27292E-05E(12th) / C8-2.17184E-07-3.42021E-07-1.38434E-061.20905E-07

[0316] FIG. 22 is a graph showing the spherical aberration of a lens assembly (e.g., a plurality of projection lenses (610)) and an optical path separating member (630) constituting a projection system (PS) according to one embodiment of the present disclosure (e.g., the embodiment of FIG. 21). In FIG. 22, the horizontal axis represents the degree of longitudinal spherical aberration, and the vertical axis represents the distance from the center of the optical axis normalized, so that the change in longitudinal spherical aberration according to the wavelength of light can be illustrated. Longitudinal spherical aberration can be shown for light with wavelengths of, for example, approximately 638.3000 nm (nanometer), approximately 518.0000 nm, or approximately 448.0000 nm, respectively. Looking at FIG. 22, it can be seen that the longitudinal spherical aberration of the lens assembly according to various embodiments of the present disclosure in the visible light band is limited to approximately +0.025 to -0.025, showing stable optical characteristics. FIG. 23 is a graph showing the astigmatism of a lens assembly (e.g., a plurality of projection lenses (610)) and an optical path separator (630) constituting a projection system (PS) according to one embodiment (e.g., the embodiment of FIG. 21).

[0317] Here, the astigmatism of the lens assembly is a result obtained at a wavelength of approximately 518.0000 nm, where the dashed line (Y) represents astigmatism in the direction of the tangential plane (e.g., tangential plane curvature), and the solid line (X) represents astigmatism in the direction of the sagittal plane (e.g., sagittal plane curvature). As can be seen from the graph, according to various embodiments of the present disclosure, the astigmatism is limited to within approximately +0.025 to -0.025, and stable optical characteristics are observed.

[0318] FIG. 24 is a graph showing the distortion of a lens assembly (e.g., a plurality of projection lenses (610)) and an optical path separator (630) constituting a projection system (PS) according to one embodiment (e.g., the embodiment of FIG. 21).

[0319] The distortion of the lens assembly is a result obtained at a wavelength of approximately 518.0000 nm, and the image captured through the lens assembly may have distortion at points (e.g., the periphery) that are off from the optical axis. However, such distortion is of a degree that can generally occur in optical devices using lenses, and the projection system (PS) and optical path separation member (630) according to one embodiment (e.g., the embodiment of FIG. 21) can provide good optical characteristics with a distortion rate of approximately less than 1.00%.

[0320] FIG. 25 illustrates a cross-sectional view and an optical path of a part of a wearable electronic device according to one embodiment of the present disclosure. FIG. 26 illustrates a cross-sectional view and an optical path of a part of an electronic device according to one embodiment of the present disclosure.

[0321] Specifically, FIGS. 25 and 26 illustrate the arrangement of a projection system (PS) and an optical path separation member (730, 830) and an optical path passing through them.

[0322] The detailed configuration of the wearable electronic device (701, 801) not described below may be identical or similar to the detailed configuration of the electronic device (101) described in relation to FIG. 1, the detailed configuration of the wearable electronic device (101) described in relation to FIG. 2 to FIG. 6, the detailed configuration of the wearable electronic device (301) described in relation to FIG. 7 to FIG. 12, the detailed configuration of the wearable electronic device (401) described in relation to FIG. 13 to FIG. 16, the detailed configuration of the wearable electronic device (501) described in relation to FIG. 17 to FIG. 20, and / or the detailed configuration of the wearable electronic device (601) described in relation to FIG. 21 to FIG. 24. The detailed configuration of the display engine (705, 805) not described below may be identical or similar to the detailed configuration of the light output module (1011) described in relation to FIG. 2, the detailed configuration of the light output module (211) described in relation to FIG. 5, the detailed configuration of the display engine (305) described in relation to FIG. 6 to FIG. 12, the detailed configuration of the display engine (405) described in relation to FIG. 13 to FIG. 16, the detailed configuration of the display engine (505) described in relation to FIG. 17 to FIG. 20, and / or the detailed configuration of the display engine (605) described in relation to FIG. 21 to FIG. 24.

[0323] According to one embodiment, a plurality of projection lenses (710, 810) may include a first projection lens (711, 811) (e.g., the first projection lens (311) of FIGS. 8 and 9). The detailed configuration of the first projection lens (711, 811) may be the same or similar to the detailed configuration of the first projection lens (311) described in relation to FIGS. 8 and 9.

[0324] According to one embodiment, a plurality of projection lenses (710, 810) may include a second projection lens (712, 812) (e.g., the second projection lens (312) of FIGS. 8 and 9). The detailed configuration of the second projection lens (712, 812) may be the same or similar to the detailed configuration of the second projection lens (312) described in relation to FIGS. 8 and 9.

[0325] According to one embodiment, a plurality of projection lenses (710, 810) may include a third projection lens (713, 813) (e.g., the third projection lens (313) of FIGS. 8 and 9). The detailed configuration of the third projection lens (713, 813) may be the same or similar to the detailed configuration of the third projection lens (313) described in relation to FIGS. 8 and 9.

[0326] According to one embodiment, a plurality of projection lenses (710, 810) may include a fourth projection lens (714, 814) (e.g., the fourth projection lens (314) of FIGS. 8 and 9). The detailed configuration of the fourth projection lens (714, 814) may be the same or similar to the detailed configuration of the fourth projection lens (314) described in relation to FIGS. 8 and 9.

[0327] According to one embodiment, a plurality of projection lenses (710, 810) may include a fifth projection lens (715, 815) (e.g., the fifth projection lens (315) of FIGS. 8 and 9). The detailed configuration of the fifth projection lens (715, 815) may be the same or similar to the detailed configuration of the fifth projection lens (315) described in relation to FIGS. 8 and 9.

[0328] According to one embodiment, the plurality of projection lenses (710, 810) may further include at least one lens disposed between the second projection lens (712, 812) and the fourth projection lens (714, 814). For example, the plurality of projection lenses (710, 810) may include a sixth projection lens (717, 817) disposed between the third projection lens (713, 813) and the fourth projection lens (714, 814).

[0329] According to one embodiment (Fig. 25), the third projection lens (713) may have a negative refractive power. The sixth projection lens (717), which is positioned on the second direction (-X direction) side of the third projection lens (713), may have a positive refractive power. The combined refractive power of the third projection lens (713) and the sixth projection lens (717) may have a positive refractive power.

[0330] According to one embodiment (Fig. 25), the Fno (F-number) of the projection system (PS) may be approximately equal to or less than 2.0. According to one embodiment (Fig. 25), the field of view (FOV) of the projection system (PS) may be approximately equal to or less than 30 deg. According to one embodiment (Fig. 25), the optical path length (OPL) of the projection system (PS) may be approximately 12.5 mm.

[0331] According to one embodiment (Fig. 26), the third projection lens (813) may have a positive refractive power. The sixth projection lens (817), which is positioned on the second direction (-X direction) side of the third projection lens (813), may have a negative refractive power. The combined refractive power of the third projection lens (813) and the sixth projection lens (817) may have a positive refractive power.

[0332] According to one embodiment (Fig. 25), the Fno (F-number) of the projection system (PS) may be approximately equal to or less than 2.0. According to one embodiment (Fig. 25), the field of view (FOV) of the projection system (PS) may be approximately equal to or less than 30 deg. According to one embodiment (Fig. 25), the optical path length (OPL) of the projection system (PS) may be approximately 12.49 mm.

[0333] In one embodiment, the third projection lens (713, 813) and the sixth projection lens (717, 817) may both have a positive refractive power.

[0334] Optical engine modules used in AR projectors can be classified into those utilizing reflective liquid crystal display technology, including LCoS (liquid crystal on silicon), and integrated light source-display optical engine modules that generate images directly from the light source itself using projection technology based on MicroLED, OLED, or MEMS mirrors. Among these, optical engine modules utilizing reflective liquid crystal display technology have the advantages of enabling high-resolution image display, excellent color accuracy, and easy improvement of response speed.

[0335] An optical engine module utilizing reflective liquid crystal display technology can be composed of an illumination system (IS) and a projection system (PS). The illumination system may consist of a light source, a collimator for light concentration, and a Fly Eye Lens (FEL) that uniformly distributes the intensity of the concentrated light. The projection system may consist of a Relay Lens that transmits light to the display. The collimator serves to gather light emitted from the light source at large angles into smaller angles. The light concentrated by the collimator has a non-uniform intensity distribution depending on the angle, which can be made uniform through the Fly Eye Lens (FEL). The Relay Lens transmits the light emitted from the FEL to the display. Additionally, an optical path splitter (e.g., PBS, polarizing beam splitter) may be provided at the intersection of the illumination system and the projection system to separate the optical paths. Light reflected from the display is transmitted externally through the projection system, and the performance of the beam projector, AR, etc., is ultimately determined by the design of the projection system.

[0336] Recently, products equipped with display engines (e.g., AR optical engine modules) in glasses-type wearable electronic devices worn by users are being introduced. These display engines are required to have high optical performance while being miniaturized.

[0337] However, conventionally, there were limitations in implementing a display engine with a large aperture type and a bright Fno value because the difficulty of designing the projection lens of a small display engine was high.

[0338] In addition, it is necessary to maintain a field of view below a certain level to improve the quality of the projected image; however, conventionally, a gap of a certain size or larger was required between projection system lenses to achieve this, which limited the miniaturization of the display engine.

[0339] The problem to be solved in the present disclosure is to provide a display engine including a large-aperture projection lens capable of securing improved optical performance while having a bright Fno value.

[0340] The problem to be solved in the present disclosure is to miniaturize the display engine to improve the feasibility of mounting the display engine in a wearable electronic device.

[0341] The problems to be solved in this disclosure are not limited to those mentioned above, and may be determined in various ways without departing from the spirit and scope of this disclosure.

[0342] A wearable electronic device according to one embodiment of the present disclosure can provide a display engine including a large-aperture projection lens that can secure improved optical performance while having a bright Fno value.

[0343] A wearable electronic device according to one embodiment of the present disclosure can improve the feasibility of mounting a display engine on a wearable electronic device through the miniaturization of the display engine.

[0344] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs from the description below.

[0345] A wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a lens frame (302) configured to accommodate a transparent member (304).

[0346] A wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a wearable member (303) connected to the lens frame (302).

[0347] A wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a display engine (305; 405; 505; 605; 705; 805) connected to at least one of the lens frame or the wearable member and configured to emit visual information projected onto the transparent member.

[0348] The display engine of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a projection system (PS) comprising a plurality of projection system lenses (310; 410; 510; 610; 710; 810) arranged in a second direction opposite to a first direction in which the visual information is emitted, and an image generation unit (316; 416; 516; 616) disposed on the second direction side of the plurality of projection system lenses and configured to receive light and generate the visual information.

[0349] The display engine of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include an illumination system (IS) arranged to intersect with the projection system and configured to provide the light to the projection system.

[0350] The display engine of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a light path separating member (330; 430; 530; 630; 730; 830) disposed between any two of the plurality of projection system lenses in the intersection area of ​​the projection system and the illumination system, and configured to allow the path of the light provided from the illumination system to enter the projection system.

[0351] Among the plurality of projection system lenses of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure, the lens closest to the image generating unit may have a negative refractive index and be composed of an aspherical lens.

[0352] A lens positioned adjacent to the first direction side of the lens closest to the image generating unit among the plurality of projection system lenses of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may have a defined refractive index.

[0353] The projection system of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may satisfy the following [Equation 1].

[0354] [Equation 1]

[0355] Fno < 2.1

[0356] (Here, Fno in [Equation 1] is the F-number of the projection system)

[0357] The projection system of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may satisfy the following [Equation 2].

[0358] [Equation 2]

[0359] FOV < 40 deg.

[0360] (Here, the FOV in [Equation 2] above is the field of view of the display engine)

[0361] The projection system of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may satisfy the following [Equation 3].

[0362] [Equation 3]

[0363] CRA < 15 deg.

[0364] (Here, CRA in [Equation 3] is the angle of the principal ray incident from the image generation unit to the plurality of projection system lenses.)

[0365] The plurality of projection lenses of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a first projection lens (311; 411; 511; 611) disposed at the first direction side end and a second projection lens (312; 412; 512; 612) disposed at the second direction side of the first projection lens.

[0366] The optical path separating member of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may be disposed between the first projection lens and the second projection lens.

[0367] The plurality of projection lenses of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a first projection lens (311; 411; 511; 611), a second projection lens (312; 412; 512; 612; 712; 812), a third projection lens (313; 413; 513; 613; 713; 813), a fourth projection lens (314; 414; 514; 614; 714; 814), and a fifth projection lens (315; 415; 515; 615) arranged sequentially in the second direction.

[0368] The fourth projection lens of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may have a defined refractive power.

[0369] The fifth projection lens of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may have a negative refractive power and may be composed of an aspherical lens.

[0370] The fourth projection lens of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may have a refractive index of 1.8 or higher and an Abbe number of 45 or lower.

[0371] The fourth projection lens of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may be composed of an aspherical lens and may include a glass material.

[0372] The fifth projection lens of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a plastic material.

[0373] The plurality of projection lenses (710; 810) of a wearable electronic device (701; 801) according to one embodiment of the present disclosure may further include at least one lens disposed between the second projection lens and the fourth projection lens.

[0374] The plurality of projection lenses of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a first projection lens (311; 411; 511; 611) disposed at the first direction side end.

[0375] The first projection lens of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may have a defined refractive power.

[0376] The first surface (S2) facing the first direction of the first projection lens of the wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may have a convex shape.

[0377] The plurality of projection lenses of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may further include a second projection lens (312; 412; 512; 612; 712; 812) disposed on the second direction side of the first projection lens.

[0378] The second projection lens of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may have a negative refractive power.

[0379] The plurality of projection lenses of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a first projection lens (311; 411; 511; 611) disposed at the end of the first direction side and a second projection lens (312; 412; 512; 612; 712; 812) disposed at the second direction side of the first projection lens.

[0380] The first projection lens and the second projection lens of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may have a refractive index greater than 1.6.

[0381] The plurality of projection lenses of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a first projection lens (311; 411; 511; 611) disposed at the first direction side end.

[0382] The projection system of the wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may satisfy the following [Equation 4].

[0383] [Equation 4]

[0384] 0.8 ≤ f1 / f ≤ 1.0

[0385] (Here, f1 is the effective focal length of the first projection lens, and f is the combined effective focal length of the plurality of projection lenses)

[0386] The projection system of the wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may satisfy the following [Equation 5].

[0387] [Equation 5]

[0388] 0.1 ≤ IMH (image height) / OPL (optical path length) ≤ 0.3

[0389] (Here, the IMH is the length between the center of the image generating unit and the outermost edge of the image generating unit, and the OPL is the distance between the first direction-side end of the first surface facing the first direction of the lens disposed at the first direction-side end among the plurality of projection system lenses and the image generating unit.)

[0390] The optical path splitting member of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may be composed of a PBS (polarizing beam splitter), a prism, and / or a mirror.

[0391] The illumination system of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a first illumination system lens (321) disposed on a third direction side intersecting the first direction of the optical path separating member, a second illumination system lens (322) disposed on a fourth direction side opposite to the third direction of the optical path separating member, a light source (323) disposed on the third direction side of the first illumination system lens, and a reflective member (324) disposed on the fourth direction side of the second illumination system lens.

[0392] A wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a lens frame (302) configured to accommodate a transparent member (304).

[0393] A wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a wearable member (303) connected to the lens frame (302).

[0394] A wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a display engine (305) connected to at least one of the lens frame or the wearable member and configured to emit visual information projected onto the transparent member.

[0395] The display engine of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a projection system (PS) comprising a plurality of projection system lenses (310; 410; 510; 610; 710; 810) arranged in a second direction opposite to a first direction in which the visual information is emitted, and an image generation unit (316) disposed on the second direction side of the plurality of projection system lenses and configured to receive light and generate the visual information.

[0396] The display engine of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include an illumination system (IS) arranged to intersect with the projection system and configured to provide the light to the projection system.

[0397] The display engine of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a light path separating member (330; 430; 530; 630; 730; 830) disposed between a first projection lens (311; 411; 511; 611) disposed at the first direction side end of the plurality of projection lenses and a second projection lens (312; 412; 512; 612; 712; 812) disposed at the second direction side of the first projection lens in the intersection area of ​​the projection system and the illumination system, and configured to allow the path of light provided from the illumination system to enter the projection system.

[0398] The projection system of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may satisfy the following [Equation 1].

[0399] [Equation 1]

[0400] Fno < 2.1

[0401] (Here, Fno in [Equation 1] is the F-number of the projection system)

[0402] The projection system of the wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may satisfy [Equation 2].

[0403] [Equation 2]

[0404] FOV < 40 deg.

[0405] (Here, the FOV of [Equation 2] above is the field of view of the entire optical system including the display engine)

[0406] The projection system of the wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure can satisfy [Equation 3].

[0407] [Equation 3]

[0408] CRA < 15 deg.

[0409] (Here, CRA in [Equation 3] is the angle of the principal ray incident from the image generation unit to the projection system.)

[0410] Among the plurality of projection system lenses of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure, the lens closest to the image generating unit may have a negative refractive index and be composed of an aspherical lens.

[0411] Among the plurality of projection system lenses of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure, the lens positioned on the first direction side of the lens positioned adjacent to the image generating unit may have a defined refractive index.

[0412] The plurality of projection lenses of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a first projection lens (311; 411; 511; 611), a second projection lens (312; 412; 512; 612; 712; 812), a third projection lens (313; 413; 513; 613; 713; 813), a fourth projection lens (314; 414; 514; 614; 714; 814), and a fifth projection lens (315; 415; 515; 615) arranged sequentially in the second direction.

[0413] The fourth projection lens of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may have a defined refractive power.

[0414] The fifth projection lens of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may have a negative refractive power and may be composed of an aspherical lens.

[0415] The plurality of projection lenses of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may include a first projection lens (311; 411; 511; 611) disposed at the first direction side end.

[0416] The first projection lens of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may have a defined refractive power.

[0417] The optical path splitting member of a wearable electronic device (301; 401; 501; 601; 701; 801) according to one embodiment of the present disclosure may be composed of a PBS (polarizing beam splitter), a prism, and / or a mirror.

[0418] Although specific embodiments have been described in the detailed description of the present disclosure, it will be obvious to those skilled in the art that various modifications are possible within the scope of the present disclosure.

[0419] Although the present disclosure has been described by way of example with respect to one embodiment, it should be understood that the embodiment is for illustrative purposes only and is not intended to limit the present disclosure. It will be obvious to those skilled in the art that various changes in form and detailed configuration may be made without departing from the whole context of the present disclosure, including the appended claims and their equivalents.

Claims

1. In a wearable electronic device (301; 401; 501; 601; 701; 801), A lens frame (302) configured to accommodate a transparent member (304); A wearing member (303) connected to the lens frame (302); and It includes a display engine (305; 405; 505; 605; 705; 805) connected to at least one of the lens frame or the wearable member and configured to emit visual information projected onto the transparent member, The above display engine is, A projection system (PS) comprising a plurality of projection system lenses (310; 410; 510; 610; 710; 810) arranged in a second direction opposite to the first direction in which the above visual information is emitted, and an image generation unit (316; 416; 516; 616) disposed on the second direction side of the plurality of projection system lenses and configured to receive light and generate the above visual information; An illumination system (IS) positioned to intersect the projection system and configured to provide the light to the projection system; and It includes an optical path separating member (330; 430; 530; 630; 730; 830) disposed between any two of the plurality of projection system lenses in the intersection area of ​​the projection system and the illumination system, and configured to allow the path of the light provided from the illumination system to enter the projection system. Among the plurality of projection system lenses, the lens closest to the image generating unit has a negative refractive index and is composed of an aspherical lens, Among the plurality of projection system lenses, the lens positioned adjacent to the first direction side of the lens closest to the image generating unit has a defined refractive index, The above projection system is a wearable electronic device (301; 401; 501; 601; 701; 801) satisfying the following [Equation 1], [Equation 2] and [Equation 3]. [Equation 1] Fno < 2.1 [Equation 2] FOV < 40 deg. [Equation 3] CRA < 15 deg. (Here, Fno in [Equation 1] is the F-number of the projection system, FOV in [Equation 2] is the field of view of the display engine, and CRA in [Equation 3] is the angle of the principal ray incident from the image generation unit to the plurality of projection system lenses.) 2. In Paragraph 1, The plurality of projection lenses includes a first projection lens (311; 411; 511; 611) disposed at the first direction side end and a second projection lens (312; 412; 512; 612) disposed at the second direction side of the first projection lens, and The above optical path separating member is a wearable electronic device (301; 401; 501; 601; 701; 801) disposed between the first projection lens and the second projection lens.

3. In Paragraph 1, The plurality of projection lenses includes a first projection lens (311; 411; 511; 611), a second projection lens (312; 412; 512; 612; 712; 812), a third projection lens (313; 413; 513; 613; 713; 813), a fourth projection lens (314; 414; 514; 614; 714; 814), and a fifth projection lens (315; 415; 515; 615) arranged sequentially in the second direction. The above-mentioned fourth projection lens has a defined refractive power, The above-mentioned fifth projection system lens has a negative refractive power and is a wearable electronic device (301; 401; 501; 601; 701; 801) composed of an aspherical lens.

4. In Paragraph 3, The above-mentioned fourth projection lens is an electronic device (301; 401; 501; 601; 701; 801) having a refractive index of 1.8 or higher and an Abbe number of 45 or lower.

5. In Paragraph 3, The above-mentioned fourth projection system lens is composed of an aspherical lens and is a wearable electronic device (301; 401; 501; 601; 701; 801) including a glass material.

6. In Paragraph 3, The above-mentioned fifth projection system lens is a wearable electronic device (301; 401; 501; 601; 701; 801) comprising a plastic material.

7. In Paragraph 3, The above plurality of projection lenses (710; 810) further include at least one lens disposed between the second projection lens to the fourth projection lens, in a wearable electronic device (701; 801).

8. In Paragraph 1, The plurality of projection lenses includes a first projection lens (311; 411; 511; 611) disposed at the first direction side end, and The first projection system lens above is an electronic device (301; 401; 501; 601; 701; 801) that has a defined refractive power and is a wearable.

9. In Paragraph 8, The first surface (S2) facing the first direction of the first projection system lens has a convex shape and is a wearable electronic device (301; 401; 501; 601; 701; 801).

10. In Paragraph 8, The plurality of projection lenses further include a second projection lens (312; 412; 512; 612; 712; 812) disposed on the second direction side of the first projection lens, and The above second projection system lens is a wearable electronic device (301; 401; 501; 601; 701; 801) having negative refractive power.

11. In Paragraph 1, The plurality of projection lenses includes a first projection lens (311; 411; 511; 611) disposed at the first direction side end and a second projection lens (312; 412; 512; 612; 712; 812) disposed at the second direction side of the first projection lens, and The first projection lens and the second projection lens are electronic devices (301; 401; 501; 601; 701; 801) having a refractive index greater than 1.

6.

12. In Paragraph 1, The plurality of projection lenses includes a first projection lens (311; 411; 511; 611) disposed at the first direction side end, and The above projection system is a wearable electronic device (301; 401; 501; 601; 701; 801) satisfying the following [Equation 4]. [Equation 4] 0.8 ≤ f1 / f ≤ 1.0 (Here, f1 is the effective focal length of the first projection system lens, and f is the combined effective focal length of the plurality of projection system lenses) 13. In Paragraph 1, The above projection system is an electronic device (301; 401; 501; 601; 701; 801) that satisfies the following [Equation 5]. [Equation 5] 0.1 ≤ IMH (image height) / OPL (optical path length) ≤ 0.3 (Here, the IMH is the length between the center of the image generating unit and the outermost edge of the image generating unit, and the OPL is the distance between the first direction-side end of the first surface facing the first direction of the lens disposed at the first direction-side end among the plurality of projection system lenses and the image generating unit.) 14. In Paragraph 1, The above optical path splitting member is an electronic device (301; 401; 501; 601; 701; 801) that is composed of a PBS (polarizing beam splitter), a prism, and / or a mirror.

15. In Paragraph 1, The above illumination system comprises a first illumination system lens (321) disposed on a third direction side intersecting the first direction of the light path separating member, a second illumination system lens (322) disposed on a fourth direction side opposite to the third direction of the light path separating member, a light source (323) disposed on the third direction side of the first illumination system lens, and a reflective member (324) disposed on the fourth direction side of the second illumination system lens. (301; 401; 501; 601; 701; 801).

Images