Wearable electronic device including a lens assembly

Abstract

A display device according to the present invention includes: a display configured to output light; and a lens assembly configured to guide light output from the display toward a user's eye, wherein the lens assembly includes: at least three lenses arranged sequentially along an optical axis from the user's eye toward the display; and a polarization assembly, wherein the polarization assembly includes a first polarization portion, a beam splitter, and a second polarization portion arranged sequentially from the user's eye toward the display, at least one of the at least three lenses may have an Abbe number of 40 or less and have negative refractive power, and the beam splitter of the polarization assembly may include a reflective surface formed as an aspherical surface without an inflection point.

Description

Technical Field

[0001] Embodiments of this disclosure relate to an electronic device, such as a wearable electronic device including a lens assembly. Background Technology

[0002] Electronic devices intended for portable purposes (such as electronic notebooks, portable multimedia players, mobile communication terminals, or tablet PCs) typically include a display component (e.g., a display module) and a battery, and have a strip-shaped, foldable, or sliding appearance due to the shape of the display component or battery. Recently, with the improvement of the performance of display components and batteries and the reduction of their size, electronic devices that can be worn on a part of the body (e.g., the wrist or head) or worn in the form of clothing have emerged (hereinafter, "wearable electronic devices").

[0003] Examples of wearable electronic devices may include head-mounted devices (HMDs), smart glasses, smartwatches (or straps), contact lens-type devices, ring-type devices, and clothing / shoe / glove-type devices. Such wearable electronic devices are easy to carry and enhance user accessibility.

[0004] As an example, a head-mounted wearable device is a device worn on a user's head or face that projects images onto the user's retina to allow viewing of virtual images in three-dimensional space. For instance, head-mounted wearable devices can be categorized into see-through types that provide augmented reality (AR) and closed-vision types that provide virtual reality (VR). See-through head-mounted wearable devices can take the form of glasses and can provide the user with information such as buildings and objects in the user's field of vision in the form of images or text. Closed-vision head-mounted wearable devices can output independent images to the user's eyes separately and provide the user with content (games, movies, streaming media, broadcasts, etc.) from mobile communication terminals or external inputs in the form of video or sound, thus providing an excellent sense of immersion. Furthermore, head-mounted wearable devices can be used to provide mixed reality (MR) or extended reality (XR), where MR or XR is a combination of augmented reality (AR) and virtual reality (VR).

[0005] Recently, we have been actively developing products related to head-mounted wearable devices. Head-mounted wearable devices are used for various purposes, such as military, gaming, industrial, and medical applications. Therefore, there is a need to provide good image quality while being lighter and smaller.

[0006] The information provided above is offered as relevant technology for the purpose of aiding understanding of this disclosure. No assertion or determination is made as to whether any of the above content can be applied as prior art in connection with this disclosure. Summary of the Invention

[0007] Technical solution According to embodiments of this disclosure, a display device may be provided. The display device may include: a display configured to output light; and a lens assembly configured to guide light output from the display toward a user's eye. The lens assembly may include at least three lenses arranged sequentially along an optical axis from the user's eye side to the display side, and a polarization assembly. The polarization assembly may include a first polarization portion, a beam splitter, and a second polarization portion arranged sequentially from the user's eye side to the display side. The at least three lenses of the lens assembly may include a synthetic resin. At least one of the at least three lenses may have an Abbe number of 40 or less and negative refractive power. The beam splitter of the polarization assembly may include a reflective surface formed as an aspherical surface without an inflection point. The display device may satisfy the following [Formula 1].

[0008] [Formula 1] 1 <DL / EFL<3 (Where, DL is the length of the effective pixel area of ​​the display, and EFL is the composite focal length of the entire optical system (or display device)) According to embodiments of this disclosure, a wearable electronic device may be provided. The wearable electronic device may include: a display configured to output light; at least three lenses arranged sequentially along an optical axis from the user's eye side to the display side; and a polarization assembly configured to reflect light output from the display at least twice between a first lens, the lens furthest from the display, and a lens, the lens closest to the display, among the at least three lenses. The polarization assembly may include a first polarization portion, a beam splitter, and a second polarization portion arranged sequentially from the user's eye side to the display side. The at least three lenses of the lens assembly may include a synthetic resin. At least one of the at least three lenses may have an Abbe number of 40 or less and negative refractive power. The beam splitter of the polarization assembly may include a reflective surface formed as an aspherical surface without an inflection point. The wearable electronic device may satisfy the following [Formula 1].

[0009] [Formula 1] 1 <DL / EFL<3 (Where, DL is the length of the effective pixel area of ​​the display, and EFL is the composite focal length of the entire optical system.) Attached Figure Description

[0010] The above or other aspects, configurations and / or advantages of embodiments of the present disclosure will become clearer from the following detailed description with reference to the accompanying drawings.

[0011] Figure 1 This is a block diagram illustrating an electronic device in a network environment according to an embodiment of the present disclosure.

[0012] Figure 2This is a view illustrating a wearable electronic device according to an embodiment of the present disclosure.

[0013] Figure 3 and Figure 4 This is a view showing the front and rear surfaces of a wearable electronic device according to an embodiment of the present disclosure.

[0014] Figure 5 The diagram illustrates the path by which light output from a display in a wearable electronic device, according to an embodiment of the present disclosure, is focused or directed to a user's eye.

[0015] Figure 6a This is a view illustrating a wearable electronic device according to an embodiment of the present disclosure.

[0016] Figure 6b This illustrates an embodiment according to the present disclosure. Figure 6a Part A is shown as an enlarged view.

[0017] Figure 7a This is a view illustrating a wearable electronic device according to an embodiment of the present disclosure.

[0018] Figure 7b This illustrates an embodiment according to the present disclosure. Figure 7a Part B is shown as an enlarged view.

[0019] Figure 8 The diagram illustrates the path by which light output from a display in a wearable electronic device, according to embodiments of the present disclosure, is focused or directed to the user's eye.

[0020] Figure 9a This is a view illustrating a wearable electronic device according to an embodiment of the present disclosure.

[0021] Figure 9b This illustrates an embodiment according to the present disclosure. Figure 9a Part C is shown as an enlarged view.

[0022] Figure 10a This is a view illustrating a wearable electronic device according to an embodiment of the present disclosure.

[0023] Figure 10b This illustrates an embodiment according to the present disclosure. Figure 10a The view shown is a magnified view of part G.

[0024] Throughout the accompanying drawings, the same reference numerals may be assigned to the same parts, components, and / or structures. Detailed Implementation

[0025] Wearable electronic devices that enable augmented reality, virtual reality, mixed reality, and / or extended reality are typically used when worn on a user's head or face. For example, a display that outputs visual information may be positioned very close to the user's eyes. When the display and the user's eyes are positioned at such a close distance, it can be difficult to configure an optical system that guides or focuses the visual information onto the user's eyes. For example, the size or number of lenses may be limited in order to miniaturize or reduce the weight of the wearable electronic device, and it may be difficult to achieve an optical system that can provide good image quality using a limited number of lenses. In an embodiment, in an environment where the display and the user's eyes are positioned at a very close distance, an optical system with a pancake lens structure can be used to provide good image quality using a limited number of lenses. An optical system with a pancake lens structure achieves an optical path of sufficient length relative to the mechanical length (e.g., the total length of the lenses) by reflecting the visual information at least twice in the path from the display to the user's eyes. The pancake lens structure can provide good image quality while reducing size. However, due to the repeated reflection structure, the refraction or scattering of light may increase. For example, when the refraction or scattering of light increases, image quality may deteriorate due to interference from refracted or scattered light.

[0026] The embodiments of this disclosure are intended to at least address the above-described problems and / or disadvantages and provide at least the advantages described below, and may provide a wearable electronic device including a lens assembly that facilitates aberration control and achieves good image quality.

[0027] Embodiments of this disclosure may provide a wearable electronic device that includes a miniaturized and / or lightweight lens assembly while providing good image quality.

[0028] Embodiments of this disclosure may provide a wearable electronic device that can reduce user fatigue during wear by miniaturization and / or weight reduction.

[0029] The technical problems to be solved in this document are not limited to those described above, and those skilled in the art to which this disclosure pertains will clearly understand from the following description other technical problems not mentioned.

[0030] The following description of the accompanying drawings provides an understanding of various exemplary embodiments of the present disclosure, including the claims and their corresponding contents. The specific embodiments disclosed in the following description require various specific details to aid understanding, but are considered as one of various embodiments. Therefore, those skilled in the art will understand that various changes and modifications can be made to the various embodiments described in this disclosure without departing from the scope and spirit of this disclosure. Furthermore, for clarity and brevity, descriptions of well-known functions and configurations may be omitted.

[0031] The terms and words used in the following description and claims are not limited to their literal meaning, but are used to clearly and consistently describe embodiments of this disclosure. Therefore, those skilled in the art will understand that the following description of various embodiments of this disclosure is for descriptive purposes only and is not intended to limit the scope of this disclosure as defined in the claims and their equivalents.

[0032] It should be understood that, unless the context explicitly indicates otherwise, the singular form includes the plural meaning. Therefore, as an example, "component surface" can be interpreted as including one or more surfaces of a component.

[0033] Figure 1 This is a block diagram illustrating an electronic device 101 in a network environment 100 according to an embodiment of the present disclosure. (Refer to...) Figure 1 In network environment 100, electronic device 101 can communicate with electronic device 102 via a first network 198 (e.g., a short-range wireless communication network), or with at least one of electronic device 104 or server 108 via a second network 199 (e.g., a long-range wireless communication network). According to an embodiment, electronic device 101 can communicate with electronic device 104 via server 108. According to an embodiment, 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, user identification module (SIM) 196, or antenna module 197. In an embodiment, at least one of the above components (e.g., connection terminal 178) may be omitted from electronic device 101, or one or more other components may be added to electronic device 101. According to an embodiment, some of the components described above (e.g., sensor module 176, camera module 180, or antenna module 197) may be integrated into a single component (e.g., display module 160).

[0034] Processor 120 may run software (e.g., program 140) to control at least one other component (e.g., hardware or software component) of electronic device 101 in conjunction with processor 120, and may perform various data processing or calculations. According to embodiments, as at least part of the data processing or calculations, processor 120 may store commands or data received from another component (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 embodiments, processor 120 may include a main processor 121 (e.g., central processing unit (CPU) or application processor (AP)) or an auxiliary processor 123 (e.g., graphics processing unit (GPU), neural processing unit (NPU), image signal processor (ISP), sensor central processor, or communication processor (CP)) that is operationally independent of or combined with the main processor 121. For example, when electronic device 101 includes a main processor 121 and an auxiliary processor 123, the auxiliary processor 123 may be configured to consume less power than the main processor 121 or be configured to be dedicated to a specific function. The auxiliary processor 123 may be implemented separately from the main processor 121 or as part of the main processor 121.

[0035] When the main processor 121 is inactive (e.g., in sleep mode), the auxiliary processor 123 (rather than the main processor 121) can 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), or when the main processor 121 is active (e.g., running an application), the auxiliary processor 123 can work with the main processor 121 to 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). According to embodiments, the auxiliary processor 123 (e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., camera module 180 or communication module 190) functionally associated with the auxiliary processor 123. According to embodiments, the auxiliary processor 123 (e.g., a neural processing unit) may include hardware architecture dedicated to artificial intelligence model processing. Artificial intelligence models can be generated via machine learning. For example, such learning can be performed via electronic device 101 where artificial intelligence is performed or via a separate server (e.g., server 108). The learning algorithm may include, but is not limited to, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning. The artificial intelligence model may include multiple layers of artificial neural networks. The 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 thereof, but is not limited thereto. Additionally or optionally, the artificial intelligence model may include software structures in addition to hardware structures.

[0036] Memory 130 may store various data used by at least one component of electronic device 101 (e.g., processor 120 or sensor module 176). The various data may include, for example, software (e.g., program 140) and input or output data for commands associated with it. Memory 130 may include volatile memory 132 or non-volatile memory 134.

[0037] The program 140 may be stored as software in the memory 130, and the program 140 may include, for example, an operating system (OS) 142, middleware 144, or application 146.

[0038] Input module 150 can receive commands or data from outside electronic device 101 (e.g., a user) that will be used by other components of electronic device 101 (e.g., processor 120). Input module 150 may include, for example, a microphone, mouse, keyboard, keys (e.g., buttons), or digital pen (e.g., stylus).

[0039] The sound output module 155 can output sound signals to the outside of the electronic device 101. The sound output module 155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as playing multimedia or playing records. The receiver can be used to receive incoming calls. According to an embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0040] Display module 160 can visually provide information to the outside of electronic device 101 (e.g., to a user). Display module 160 may include, for example, a display, a holographic device, or a projector, and control circuitry for controlling a respective one of the display, holographic device, and projector. According to an embodiment, 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 the touch.

[0041] The audio module 170 can convert sound into electrical signals and vice versa. According to an embodiment, the audio module 170 can obtain sound via the input module 150, or output sound via the sound output module 155 or via headphones of an external electronic device (e.g., electronic device 102) that is directly (e.g., wired) or wirelessly connected to the electronic device 101.

[0042] Sensor module 176 can detect the operating state of electronic device 101 (e.g., power or temperature) or the external environmental state (e.g., user state), and then generate an electrical signal or data value corresponding to the detected state. According to embodiments, sensor module 176 may include, for example, a gesture sensor, gyroscope sensor, atmospheric pressure sensor, magnetic sensor, accelerometer, grip sensor, proximity sensor, color sensor, infrared (IR) sensor, biometric sensor, temperature sensor, humidity sensor, or illuminance sensor.

[0043] Interface 177 may support one or more specific protocols used to enable electronic device 101 to be directly (e.g., wired) or wirelessly coupled to external electronic device (e.g., electronic device 102). According to embodiments, interface 177 may include, for example, a High Definition Multimedia Interface (HDMI), a Universal Serial Bus (USB) interface, a Secure Digital Card (SD) interface, or an audio interface.

[0044] Connection 178 may include a connector, through which electronic device 101 may be physically connected to an external electronic device (e.g., electronic device 102). According to embodiments, connection 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0045] The haptic module 179 can convert electrical signals into mechanical stimuli (e.g., vibration or motion) or electrical stimuli that can be recognized by a user through his touch or kinesthesia. According to embodiments, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulator.

[0046] Camera module 180 can capture still or moving images. According to an embodiment, camera module 180 may include one or more lenses, an image sensor, an image signal processor, or a flash.

[0047] The power management module 188 manages the power supply to the electronic device 101. According to an embodiment, the power management module 188 may be implemented as at least part of, for example, a power management integrated circuit (PMIC).

[0048] Battery 189 can power at least one component of electronic device 101. According to embodiments, battery 189 may include, for example, a non-rechargeable primary battery, a rechargeable accumulator, or a fuel cell.

[0049] Communication module 190 can support the establishment of a direct (e.g., wired) or wireless communication channel between electronic device 101 and external electronic devices (e.g., electronic device 102, electronic device 104, or server 108), and perform communication via the established communication channel. Communication module 190 may include one or more communication processors operating independently of processor 120 (e.g., application processor (AP)) and support direct (e.g., wired) or wireless communication. According to embodiments, communication module 190 may include wireless communication module 192 (e.g., cellular communication module, short-range wireless communication module, or Global Navigation Satellite System (GNSS) communication module) or wired communication module 194 (e.g., local area network (LAN) communication module or power line communication (PLC) module). A corresponding one of these communication modules can communicate via a first network 198 (e.g., a short-range communication network, such as Bluetooth). TM The wireless communication module 192 can communicate with external electronic devices via a Wi-Fi Direct or Infrared Data Association (IrDA) network or a second network 199 (e.g., a long-range communication network such as a traditional cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a local area network (LAN) or a wide area network (WAN))). These various types of communication modules can be implemented as a single component (e.g., a single chip) or as multiple components separate from each other (e.g., multiple chips). The wireless communication module 192 can use user information (e.g., an International Mobile Subscriber Identity (IMSI)) stored in the user identification module 196 to identify or verify the electronic device 101 in the communication network (such as a first network 198 or a second network 199).

[0050] Wireless communication module 192 can support 5G networks following 4G networks and next-generation communication technologies (e.g., new radio (NR) access technologies). NR access technologies can support enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), or ultra-reliable low-latency communication (URLLC). Wireless communication module 192 can support high-frequency bands (e.g., millimeter-wave bands) to achieve, for example, high data transmission rates. Wireless communication module 192 can support various technologies used to ensure performance in high-frequency bands, such as, for example, beamforming, massive MIMO, full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, or massive antennas. Wireless communication module 192 can support various requirements specified in electronic device 101, external electronic devices (e.g., electronic device 104), or network systems (e.g., second network 199). According to an embodiment, the wireless communication module 192 may support peak data rates (e.g., 20 Gbps or greater) for implementing eMBB, lost coverage (e.g., 164 dB or less) for implementing mMTC, or U-plane latency (e.g., 0.5 ms or less for each of the downlink (DL) and uplink (UL), or 1 ms or less round trip) for implementing URLLC.

[0051] Antenna module 197 can transmit or receive signals or power to or from an external location (e.g., an external electronic device). According to an embodiment, the antenna module may include an antenna comprising a radiator formed of a conductor or conductive pattern on a substrate (e.g., a printed circuit board (PCB)). According to an embodiment, antenna module 197 may include multiple antennas (e.g., an antenna array). In this case, at least one antenna suitable for a communication scheme used in a communication network (such as a first network 198 or a second network 199) can be selected from the multiple antennas by, for example, communication module 190. Signals or power can then be transmitted or received between communication module 190 and an external electronic device via the selected at least one antenna. According to an embodiment, other components besides the radiator (e.g., a radio frequency integrated circuit (RFIC)) may also be formed as part of antenna module 197.

[0052] According to an embodiment, antenna module 197 can form a millimeter-wave antenna module. According to an embodiment, the millimeter-wave antenna module may include a printed circuit board, an RFIC, and multiple antennas (e.g., an array antenna), wherein the RFIC is disposed on a first surface (e.g., the bottom surface) of the printed circuit board, or adjacent to the first surface and capable of supporting a specified high-frequency band (e.g., a millimeter-wave band), and the multiple antennas are disposed on a second surface (e.g., the top surface or a side surface) of the printed circuit board, or adjacent to the second surface and capable of transmitting or receiving signals in the specified high-frequency band.

[0053] At least some of the aforementioned components can be combined with each other and communicate signals (e.g., commands or data) between them via an inter-peripheral communication scheme (e.g., bus, general purpose input / output (GPIO), serial peripheral interface (SPI), or mobile industrial processor interface (MIPI)).

[0054] According to an embodiment, instructions or data can be sent or received between electronic device 101 and external electronic device 104 via server 108 connected to a second network 199. External electronic device 102 or external electronic device 104 may each be a device of the same type as electronic device 101, or a device of a different type. According to an embodiment, all or some operations to be performed on electronic device 101 may be performed on one or more of external electronic devices 102, external electronic device 104, or server 108. For example, if electronic device 101 is required to automatically perform a function or service, or is required to perform a function or service in response to a request from a user or another device, electronic device 101 may request the one or more external electronic devices to perform at least a portion of the function or service, instead of running the function or service, or electronic device 101 may request the one or more external electronic devices to perform at least a portion of the function or service in addition to running the function or service. Upon receiving the request, the one or more external electronic devices may perform the requested at least portion of the function or service, or perform additional functions or services related to the request, and send the result of the execution to electronic device 101. Electronic device 101 may provide the result as at least a partial response to the request, with or without further processing of the result. For this purpose, technologies such as cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing may be used. Electronic device 101 may use, for example, distributed computing or mobile edge computing to provide ultra-low latency services. In an embodiment, external electronic device 104 may include an Internet of Things (IoT) device. Server 108 may be an intelligent server using machine learning and / or neural networks. According to an embodiment, external electronic device 104 or server 108 may be included in a second network 199. Electronic device 101 can be applied to intelligent services (e.g., smart homes, smart cities, smart cars, or healthcare) based on 5G communication technology or IoT-related technologies.

[0055] The electronic device according to embodiments of this disclosure can be one of various types of electronic devices. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. According to embodiments of this disclosure, the electronic device is not limited to those described above.

[0056] The embodiments of this disclosure and the terminology used therein are not intended to limit the technical features described herein to particular embodiments, but should be understood to include various modifications, equivalents, or substitutions of the embodiments. Similar reference numerals may be used for similar or related components in the description of the drawings. It will be understood that, unless the relevant context explicitly indicates otherwise, the singular form of a noun corresponding to an item may include one or more things. As used herein, each of the 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” may include all possible combinations of the items enumerated together with the corresponding phrase among the plurality of phrases. As used herein, terms such as “first” and “second” or “first” and “second” may be used to simply distinguish one component from another and do not limit the components in other respects (e.g., importance or order). It will be understood that, whether or not the terms “operably” or “communically” are used, if an element (e.g., a first element) is referred to as being “combined” with, “combined to”, “connected to”, or “attached to” another element (e.g., a second element), it means that the first element can be directly (e.g., wiredly) connected to, wirelessly connected to, or combined with the other element via a third element.

[0057] As used herein, the term "module" can include units implemented in hardware, software, or firmware, and is used interchangeably with other terms such as "logic," "logic block," "part," or "circuit." A module can be a single integrated component adapted to perform one or more functions, or the smallest unit or part of such a single integrated component. For example, according to embodiments, modules can be implemented in the form of application-specific integrated circuits (ASICs).

[0058] The embodiments described herein can be implemented as software (e.g., a program) including one or more instructions stored in a machine-readable storage medium (e.g., internal or external memory). For example, a processor of a machine (e.g., an electronic device) can invoke and execute at least one of one or more instructions stored in the storage medium, with or without the use of one or more other components, under the control of the processor. This allows the machine to be operated to perform at least one function according to the invoked at least one instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, the term "non-transitory" simply means that the storage medium is a tangible device and does not include signals (e.g., electromagnetic waves), but the term does not distinguish whether data is stored semi-permanently or temporarily in the storage medium.

[0059] According to embodiments, methods according to various embodiments of this disclosure may be included and incorporated into a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., a read-only optical disc (CD-ROM)) or via an app store (e.g., the Play Store). TM Online distribution (e.g., download or upload) or direct distribution between two user devices (e.g., smartphones). If distributed online, at least a portion of the computer program product may be temporarily generated or at least temporarily stored in a machine-readable storage medium (such as the memory of a manufacturer's server, an app store's server, or a relay server).

[0060] According to embodiments, each component (e.g., a module or program) described above may include a single entity or multiple entities. Some of the multiple entities may be individually located in different components. According to embodiments, one or more of the components described above may be omitted, or one or more other components may be added. Optionally or additionally, multiple components (e.g., modules or programs) may be integrated into a single component. In this case, according to various embodiments, the integrated component may still perform one or more functions of the corresponding components in the multiple components in the same or similar manner as each of the multiple components performed its function before integration. According to various embodiments, operations performed by a module, program, or other component may be performed sequentially, in parallel, repeatedly, or heuristically, or may be run in a different order or one or more operations may be omitted, or one or more other operations may be added.

[0061] Figure 2 This is a view showing a wearable electronic device 200 according to an embodiment of the present disclosure.

[0062] Although some reference numerals are presented in describing embodiments of the present disclosure, it should be noted that the reference numerals do not limit the embodiments of the present disclosure unless they are set forth in the claims.

[0063] Reference Figure 2 Wearable electronic devices 200 (e.g., Figure 1 The wearable electronic device 201 can be a wearable device worn on a user's head or face, allowing the user to visually identify surrounding objects or the environment even while wearing the wearable electronic device 200. The wearable electronic device 200 can use a camera module to acquire and / or identify visual images of the environment or objects in the direction the wearable electronic device 200 is facing or the direction the user is looking, and receive information about the objects or environment from external electronic devices via a network. The wearable electronic device 200 can provide the user with the received object-related or environment-related information in audio or visual form. For example, the wearable electronic device 200 can use display components (such as a display module, e.g., Figure 1 The display module 160 provides the user with information about the received object or environment in a visual form. The wearable electronic device 200 realizes information about the object or environment in a visual form and combines the visual form with a real image (or video) of the user's surrounding environment; therefore, the wearable electronic device 200 can realize augmented reality (AR), virtual reality (VR), mixed reality (MR), and / or extended reality (XR). The display component can output a screen showing the actual image (or video) of the augmented reality object being added to the user's surrounding environment, thereby providing the user with information about the surrounding things or environment.

[0064] According to embodiments, all or some of the operations that would be performed at electronic device 101 or wearable electronic device 200 can be performed at one or more of the external electronic devices 102, 104, or 108. For example, when electronic device 101 or wearable electronic device 200 is required to perform a predetermined function or service automatically or in response to a request from a user or another device, electronic device 101 or wearable electronic device 200 may request one or more external electronic devices 102, 104, or 108 to perform at least a portion of the function or service, instead of performing the function or service itself, or electronic device 101 or wearable electronic device 200 may request one or more external electronic devices 102, 104, or 108 to perform at least a portion of the function or service in addition to performing the function or service itself. The one or more external electronic devices receiving the request may perform at least a portion of the requested function or service, or perform additional functions or services related to the request, and transmit the result of the execution to electronic device 101 or wearable electronic device 200. Electronic device 101 or wearable electronic device 200 may provide the results as at least part of a response to a request, with or without further processing of the results. For example, external electronic device 102 renders content data executed by an application and sends the rendered data to electronic device 101 or wearable electronic device 200, and electronic device 101 or wearable electronic device 200, upon receiving the data, may output the content data to a display module. When electronic device 101 or wearable electronic device 200 detects user movement via sensors (such as inertial measurement unit sensors), the processor of electronic device 101 or wearable electronic device 200 (e.g., Figure 1 The processor 120 can correct the rendered data received from the external electronic device 102 based on motion information and output the corrected data to the display module. Optionally, when user movement is detected by a sensor, the processor of the electronic device 101 or the wearable electronic device 200 (e.g., ...) can... Figure 1 The processor 120 can transmit motion information to the external electronic device 102 and request rendering to update screen data. According to various embodiments, the external electronic device 102 can be various types of devices, such as a housing device capable of storage and charging the electronic device 101.

[0065] In the following detailed description, the phrase “the state or position of an electronic device or a designated component of an electronic device facing the user’s face” may be referred to in various ways, and it should be noted that this assumes the user is wearing the wearable electronic device 200.

[0066] According to an embodiment, the wearable electronic device 200 may include at least one display component and a wearable component. Depending on the structure of the display component, the wearable electronic device 200 may also include a structure (e.g., a lens frame) for mounting or supporting the display component. A pair of display components, including a first display component and a second display component, may be provided and configured to correspond to the user's right and left eyes, respectively, when the wearable electronic device 200 is worn on the user's body. In an embodiment, the wearable electronic device 200 may have a housing shape (e.g., a goggle shape) including a display component corresponding to the right and left eyes.

[0067] According to an embodiment, the display component is a component configured to provide visual information to a user, and may include, for example, a display D, a plurality of lenses L1, L2, L3, and L4 (e.g., a lens assembly) and / or at least one sensor. Although in Figure 2 The diagram shows a total of four lenses, but according to embodiments, the display component may include three lenses L1, L2, L3 in which at least one lens (e.g., a fourth lens L4) is omitted. Here, the lens assembly and the display D may each be formed as transparent or translucent. However, the display component is not limited thereto. In embodiments, the display component may include a window component, which may be translucent glass or a component capable of adjusting its light transmittance according to the density of the tint. In embodiments, the display component may include a reflective lens or a lens including a waveguide. An image output from a light output device (e.g., a projector or display D) may be formed on each lens to provide visual information to the user. For example, the display component may represent a display that may include a waveguide (e.g., an optical waveguide) in at least a portion of each lens, and an image (or light) output from a light output device (such as display D) is transmitted to the user's eye through the waveguide included in the display component, while simultaneously transmitting the real world to the user's eye in a see-through manner through that area. In embodiments, the waveguide may be understood as part of the lens assembly. The lens assembly (e.g., Figures 5 to 10b A lens assembly (LA) is an assembly comprising multiple lenses (e.g., L1, L2, L3) and can be aligned with the optical axis (e.g., Figures 5 to 10b The optical axis (O) is aligned in a state within the space of the wearable electronic device 200. See below for reference. Figure 5 Recheck the configuration that provides the visual information output by the display D to the user's eyes via the lens assembly.

[0068] Figure 3 and Figure 4 This is a view showing the front and rear surfaces of a wearable electronic device 300 according to an embodiment.

[0069] Reference Figure 3 and Figure 4In an embodiment, camera modules 311, 312, 313, 314, 315, 316 and / or depth sensor 317 for acquiring information related to the surrounding environment of the wearable electronic device 300 may be disposed on a first surface 310 of the electronic device 300 (e.g., housing).

[0070] In an embodiment, camera modules 311 and 312 can acquire images related to the surrounding environment of the wearable electronics.

[0071] In embodiments, camera modules 313, 314, 315, and 316 can acquire images when a user wears a wearable electronic device. Camera modules 313, 314, 315, and 316 can be used for hand detection, tracking, and recognition of user gestures (e.g., hand movements). Camera modules 313, 314, 315, and 316 can be used for 3-DOF or 6DoF head tracking, position (spatial or environmental) recognition, and / or motion recognition. In embodiments, camera modules 311 and 312 can be used for hand detection and tracking, or recognition or detection of user gestures.

[0072] In an embodiment, depth sensor 317 may be configured to send and receive signals reflected from an object and to identify the distance to the object (such as time-of-flight (TOF)). Optionally, or in addition to depth sensor 317, camera modules 313, 314, 315, and 316 may identify the distance to the object.

[0073] According to an embodiment, facial recognition camera modules 325, 326 and / or display 331 (and / or lens) may be disposed on the second surface 320 of the housing.

[0074] In this embodiment, facial recognition camera modules 325 and 326, adjacent to the display, can be used to recognize the user's face, or to recognize and / or track the user's eyes.

[0075] In one embodiment, the display 331 (and / or lens) may be disposed on the second surface 320 of the wearable electronic device 300. In another embodiment, the display 331 (and / or lens) may be... Figure 2 The displays D (and / or lenses L1, L2, L3, L4) are at least partially similar or substantially identical. In embodiments, the wearable electronics 300 may not include camera modules 315 and 316 among the plurality of camera modules 313, 314, 315, and 316. Although not explicitly stated in Figure 3 and Figure 4 As shown, but wearable electronic device 300 may also include Figure 1 and / or Figure 2 At least one of the configurations shown.

[0076] In this embodiment, the display 331 can be understood as a display module including an output screen (e.g., Figure 1 The display module 160) and the lens assembly that focuses the output screen onto the user's eyes (e.g., Figures 5 to 10b The lens assembly LA). It should be noted that, in Figure 4 In this process, reference numbers are assigned to the externally visible portion of the wearable electronic device 300, and the reference numbers are indicated on the lens of the display 331 (and / or lens) that is closest to the user's eye.

[0077] As described above, according to the embodiments, the wearable electronic device 300 may have a size specification for wearing on a user's head. The wearable electronic device 300 may also include a strap and / or wearing member to be secured to a part of the user's body. The wearable electronic device 300 may provide a user experience based on augmented reality, virtual reality, and / or mixed reality when worn on a user's head.

[0078] Figure 5 The diagram illustrates the path by which light output from a display D in a wearable electronic device 400 is focused or directed to the user's eye Y, according to an embodiment of the present disclosure.

[0079] Further reference Figure 5 and Figure 2 A wearable electronic device 400 according to embodiments of the present disclosure may include a display D and a lens assembly LA, the lens assembly LA being configured to refract, transmit, and / or reflect light output from the display D to deliver light to a user's eye Y. In this disclosure, the display D and the lens assembly LA may be collectively referred to as a "display device".

[0080] According to an embodiment, the lens assembly LA may include a plurality of (e.g., at least three) lenses L1, L2, L3 and a polarization assembly P including a first polarization portion P1 and a second polarization portion P2. According to an embodiment, the optical axis O (in the form of a straight line extending between the display D and the user's eye Y) may be... Figure 5 , Figure 6a , Figure 7a , Figure 8 , Figure 9a and Figure 10aThe dashed line O in the diagram indicates the alignment of lenses L1, L2, L3, the first polarization portion P1, and / or the second polarization portion P2. According to an embodiment, the polarization assembly P (e.g., the first polarization portion P1 and the second polarization portion P2) may include at least one quarter-wave plate (QWP) 404, 407, at least one reflective polarizer (RP) 403, at least one polarizer (POL) 402, 408, and / or at least one beam splitter 405. According to an embodiment, the lens assembly LA may also include at least one anti-reflective (AR) layer 401, 406. According to an embodiment, at least one of the plurality of lenses L1, L2, L3 is movable and adjustable in diopter to provide vision correction to the user.

[0081] According to an embodiment, a polarization component P (e.g., a first polarization portion P1 and a second polarization portion P2) may be disposed between the first lens L1 (hereinafter referred to as "first lens L1") of the lenses L1, L2, L3 of the lens assembly LA, starting from the user's eye Y, and the display D. For example, according to an embodiment where the polarization component P is positioned further away from the user's eye Y than the first lens L1, damage to the polarization component P during manufacturing or use can be reduced or prevented compared to a case where at least a portion of the polarization component P is positioned closer to the user's eye Y than the first lens L1.

[0082] According to embodiments, at least one quarter-wave plate 404, 407, at least one reflective polarizer 403, and at least one beam splitter 405 included in polarization components P (e.g., first polarization portion P1 and / or second polarization portion P2) can extend and / or adjust the light travel path length between the user's eye Y and the display D. For example, by achieving a focal length longer than the mechanical or physical length of the lens assembly LA, the quality of the image provided to the user can be enhanced. Wearable electronics (e.g., AR / VR glasses) are limited in size or weight due to practical use environments (e.g., use in a worn state), thus the resolution of the output virtual image may be limited, and it may be difficult to provide a good quality image to the user even through the optical system. According to embodiments, wearable electronics 400 includes an optical system with a pancake lens structure (e.g., lens assembly LA), thus extending the optical path length of incident light relative to the external dimensions, and / or increasing the image resolution provided to the user. For example, wearable electronics 400 includes a display D and a lens assembly LA, and can be an optical device (e.g., AR / VR glasses) that provides visual information to the user when worn on the user's head or face.

[0083] According to an embodiment, the display D may include a screen display area, wherein, when a user wears the wearable electronic device 400, the screen display area exposes visual information to a portion corresponding to the user's eyes. In an embodiment, the wearable electronic device 400 may include a pair of displays D corresponding to the user's eyes. The displays D may include, for example, a liquid crystal display (LCD), a light-emitting diode (LED) display, an organic light-emitting diode (OLED) display, a microelectromechanical system (MEMS) display, or an electronic paper display. The displays D may display various content (e.g., text, images, videos, icons, or symbols) provided to the user as visual information.

[0084] According to an embodiment, various content (e.g., text, images, videos, icons, or symbols) output from the display D in the form of light can pass through at least one quarter-wave plate 404, 407, at least one reflective polarizer 403, at least one beam splitter 405, and / or multiple lenses L1, L2, L3, and be provided to the user's eye. The order in which light passes through the at least one quarter-wave plate 404, 407, at least one reflective polarizer 403, at least one beam splitter 405, and / or multiple lenses L1, L2, L3 can be configured differently according to the embodiment.

[0085] According to an embodiment, the wearable electronic device 400 may also include a cover window (e.g., Figure 6a , Figure 7a , Figure 9a and Figure 10a A cover window (W) is provided on the user's eye-side surface of the display D. According to an embodiment, light emitted from the display D can pass through the cover window (e.g., Figure 6a , Figure 7a , Figure 9a and Figure 10a The coverage window W) is then transmitted to the lens assembly LA. In this disclosure, "set on XX" may mean being set to be adjacent to or substantially in contact with XX.

[0086] According to an embodiment, the first polarization portion P1 can be configured to selectively transmit, reflect, and / or block light output from the display D and transmitted through the remaining lenses L2, L3 (excluding the first lens L1), the beam splitter 405, and the second polarization portion P2, and transmit the light to the first lens L1. According to an embodiment, the first polarization portion P1 can be positioned between the first lens L1, which is furthest from the display D, and the second lens L2, which is second furthest from the display D. According to an embodiment (for example, see...), Figure 6a and Figure 6b The first polarizing portion P1 can be disposed on the subject-side surface E2 of the second lens L2. According to an embodiment (for example, see...), Figures 7a to 10bThe first polarization portion P1 can be disposed on the display-side surface D1 of the first lens L1.

[0087] In an embodiment, the first polarization portion P1 may include a first antireflective layer 401, a first polarizer 402, a reflective polarizer 403, and / or a first quarter-wave plate 404. For example, the first antireflective layer 401, the first polarizer 402, the reflective polarizer 403, and / or the first quarter-wave plate 404 may be formed in the form of a film. In an embodiment, the first antireflective layer 401, the first polarizer 402, the reflective polarizer 403, and / or the first quarter-wave plate 404 of the first polarization portion P1 may be bonded to each other, or may be formed by spacing them apart using an air layer (or air gap), another polarizing layer, and / or a dummy layer. Here, the air layer, the adhesive layer, the other polarizing layer, and / or the dummy layer may be substantially non-refractive. Here, for example, "any two components of the first antireflective layer 401, the first polarizer 402, the reflective polarizer 403, and / or the first quarter-wave plate 404 are spaced apart from each other using an adhesive layer, another polarizing layer, or a dummy layer" may refer to a structure in which any two components are laminated. Here, "lamination" can refer to two different components being bonded together by an adhesive disposed on at least one of them. For example, when the first antireflective layer 401 and the first polarizer 402 are laminated, the first antireflective layer 401 and the first polarizer 402 can be bonded to each other by an adhesive layer disposed between them, and in this case, the first antireflective layer 401 and the first polarizer 402 can be stacked on top of each other using another polarizing layer (and / or dummy layer) between them, and can be bonded to each other by an adhesive layer. For example, the first polarizing portion P1 in the form of the first antireflective layer 401, the first polarizer 402, the reflective polarizer 403 and / or the first quarter-wave plate 404 being laminated can be thinner and have better optical performance than simply stacked film-type polarizing components. According to embodiments, a portion of the first polarizing portion P1 (e.g., the first antireflective layer 401) can be omitted.

[0088] In an embodiment, beam splitter 405 may be configured to transmit a portion of the incident light and reflect another portion of the incident light. For example, beam splitter 405 may be configured to transmit approximately 50% of the light and reflect approximately 50% of the light. In an embodiment, beam splitter 405 may be configured as a semi-transparent mirror and may be configured, for example, to be coated on a surface of the second lens L2 (e.g., Figures 9a to 10b The display-side surface D2 of the second lens L2 or a surface of the third lens L3 (e.g., the display-side surface D2 of the second lens L2) or a surface of the third lens L3 (e.g., Figures 6a to 7b The third lens L3 is a mirror on the display side surface D3.

[0089] According to an embodiment (for example, see...) Figures 5 to 7b ), beam splitter 405 (e.g., Figures 5 to 7bThe beam splitter 405 can be disposed on either of the two surfaces of the third lens L3 (hereinafter referred to as "third lens L3") originating from the user's eye Y in the lens assembly LA. In this disclosure, "disposed on XX" can mean disposed adjacent to or substantially in contact with XX. In this disclosure, "two surfaces" of any lens can refer to the user's eye Y-side surface and the display D-side surface of any lens. According to an embodiment, the beam splitter 405 can be disposed adjacent to (or substantially in contact with) the display-side surface of the third lens L3 (or disposed on the display-side surface). However, in this disclosure, the position of the beam splitter 405 can be varied, and according to an embodiment (e.g., see...), the beam splitter 405 can be disposed on either of the two surfaces of the third lens L3 originating from the user's eye Y. Figures 8 to 10b The beam splitter 405 can be disposed on either of the two surfaces (e.g., the display side surface) of the second lens L2 (hereinafter referred to as "second lens L2") in the lens assembly LA, starting from the user's eye Y.

[0090] According to an embodiment, the second polarization portion P2 is set to be closer to the display D than the first polarization portion P1, and can be configured to selectively transmit and / or block light output from the display D and transmit the light to lenses L1, L2 and / or L3, beam splitter 405 and the first polarization portion P1.

[0091] In the embodiments (for example, see...) Figures 5 to 7b The second polarization portion P2 can be disposed between the lens assembly LA (e.g., the third lens L3) and the display D. According to an embodiment (e.g., see...),... Figures 5 to 7b The second polarization portion P2 can be disposed on the overlay window W, wherein the overlay window W is disposed on the user eye-side surface of the display D. According to an embodiment (for example, see...), Figure 8 , Figure 9a and Figure 9b The second polarization portion P2 can be positioned between the third lens L3, which is closest to the display D, and the second lens L2, which is second closest to the display D. According to an embodiment (for example, see...), Figure 9a and Figure 10a The second polarization portion P2 can be disposed on the display-side surface of the third lens L3, which is closest to the display D (for example, see...). Figure 10a ) or the surface of the user's eye (e.g., see Figure 9a According to an embodiment, the surface of the lens (e.g., the third lens L3) to which the first polarizing portion P1 is attached (e.g., the display-side surface or the user's eye-side surface) can be implemented as a substantially flat surface.

[0092] In an embodiment, the second polarization portion P2 may include a second antireflective layer 406, a second polarizer 408, and / or a second quarter-wave plate 407. For example, the second antireflective layer 406, the second polarizer 408, and / or the second quarter-wave plate 407 may be formed in the form of a film. In an embodiment, the second antireflective layer 406, the second polarizer 408, and / or the second quarter-wave plate 407 of the second polarization portion P2 may be bonded to each other, or may be formed by providing an air layer (or air gap), another polarizing layer, and / or a dummy layer between them. Here, the air layer, the adhesive layer, the other polarizing layer, and / or the dummy layer may be substantially non-refractive. Here, for example, "any two components of the second antireflective layer 406, the second polarizer 408, and / or the second quarter-wave plate 407 are spaced apart from each other by an adhesive layer, another polarizing layer, or a dummy layer between them" may refer to a structure in which two components are laminated. According to an embodiment, here, "laminated" may mean providing an adhesive on at least one of two different components and bonding the components together. For example, when the second antireflective layer 406 and the second polarizer 408 are laminated, the second antireflective layer 406 and the second polarizer 408 can be bonded to each other by an adhesive layer disposed between them. In this case, the second antireflective layer 406 and the second polarizer 408 can be stacked on top of each other using another polarizing layer (and / or a dummy layer) between them, and can be bonded to each other by an adhesive layer. For example, the second polarizing portion P2 in the form of the second antireflective layer 406, the second polarizer 408 and / or the second quarter-wave plate 407 being laminated can be thinner and have better optical performance than simply stacked film-type polarizing members. According to an embodiment, a portion of the second polarizing portion P2 (e.g., the second antireflective layer 406) can be omitted.

[0093] In the illustrated embodiment, the first lens L1 of the wearable electronics 400 or lens assembly LA can be understood as the lens among a plurality of (e.g., at least three) lenses configured to be furthest from the display D, or configured to be closest to the user's eye Y. However, it should be noted that the embodiments of this disclosure are not limited thereto. For example, although not shown, the wearable electronics 400 or lens assembly LA may also include a transmissive optical element configured to be farther from the display D than the first lens L1. In embodiments, the transmissive optical element may have a shape that does not affect… Figure 5 , Figure 6a , Figure 7a , Figure 8 , Figure 9a and Figure 10a Wearable electronic devices 400, 500, 600, 700 and / or Figure 5 , Figure 6a , Figure 7a , Figure 8 , Figure 9a and Figure 10aThe refractive power of the lens assembly LA is determined by the degree of optical performance. In an embodiment, the transmissive optical component, positioned further from the display D than the first lens L1, may have a transmittance of approximately 90% or greater for visible light. In another embodiment, the transmissive optical component may have a transmittance close to 100% for visible light.

[0094] According to embodiments, liquid crystal displays, organic light-emitting diode displays, and / or micro-LEDs may include polarizers, thus providing images of good quality. In embodiments, when the lens assembly LA further includes a first polarization portion P1, the image quality perceived by the user is enhanced even when the display D outputs an image of the same quality. In embodiments, when combined with a lens assembly LA including a first polarization portion P1 and a second polarization portion P2, some polarizers may be omitted in the display D implemented as an organic light-emitting diode display or a micro-LED.

[0095] In the following description, the direction from the user's eye Y toward the display D may be referred to as the first direction, and the direction from the display D toward the user's eye Y, opposite to the first direction, may be referred to as the second direction. The first and second directions may be substantially parallel to the optical axis O. The lens assembly LA may include a plurality of lenses (e.g., a first lens L1, a second lens L2, and a third lens L3) arranged sequentially along the first direction.

[0096] According to an embodiment, the arrangement of the polarization portions P1, P2 and / or beam splitter 405 of the polarization component P can provide good image quality while miniaturizing an optical system implemented using a limited number (e.g., at least three) of lenses L1, L2, L3. According to an embodiment, the polarization axis of the first polarizer 402 of the first polarization portion P1 and the polarization axis of the second polarizer 408 of the second polarization portion P2 can form a 90-degree angle. The fast axis of the first quarter-wave plate 404 of the first polarization portion P1 and the fast axis of the second quarter-wave plate 407 of the second polarization portion P2 can also form a 90-degree angle. In the following description, references to antireflective members 401, 406 may be omitted.

[0097] Reference Figure 5According to an embodiment, the wearable electronic device 400 can operate as follows: Light output from the display D can pass through at least three lenses L1, L2, L3 of the lens assembly LA, the second polarization portion P2, the beam splitter BS, and the first polarization portion P1, and then reach the user's eye Y. In this case, the second polarizer 408 of the second polarization portion P2 transmits first linear polarization (e.g., vertical polarization (or p-polarization)) and may not transmit second linear polarization (e.g., horizontal polarization (or s-polarization)). For example, in the light reaching the second polarizer 408, only vertical polarization (or p-polarization) may be transmitted. The light transmitted through the second polarizer 408 is converted to circular polarization (right circular polarization or left circular polarization) by the second quarter-wave plate 407, and the circularly polarized light can sequentially pass through the beam splitter 405, the third lens L3, and the second lens L2, and then reach the first quarter-wave plate 404. The circularly polarized light reaching the first quarter-wave plate 404 can be converted back to linear polarization (e.g., vertical polarization (or p-polarization)) as it passes through the first quarter-wave plate 404 and reaches the reflective polarizer 403. Before reaching the reflecting polarizer 403, the light can move in the second direction (display D → user's eye Y). The light reaching the reflecting polarizer 403 is reflected by it and moves in the first direction (user's eye Y → display D), and can be converted to circular polarization (right-hand or left-hand circular polarization) when it re-transmits through the first quarter-wave plate 404. The circularly polarized light (right-hand or left-hand circular polarization) can be reflected by the beam splitter 405 in the second direction, at which point the phase can be shifted (e.g., from left-hand to right-hand, or from right-hand to left-hand). The circularly polarized light with the converted phase can pass along the second direction through the first quarter-wave plate 404 and the reflecting polarizer 403 and reach the user's eye Y. In this case, the light transmitted through the first quarter-wave plate 404 can be converted to horizontal polarization (or s-polarization) and reach the user's eye Y. However, Figure 5 The embodiments illustrate the changes in the state of light passing through the wearable electronic device 400 according to the embodiments, and it should be noted that the conversion of polarization components by the reflective polarizer 403, quarter-wave plates 404, 407, beam splitter 405 and / or second polarizer 408 may differ from the described embodiments.

[0098] Figure 6a This illustrates a wearable electronic device 400 according to an embodiment of the present disclosure (e.g., Figure 1 Electronic device 101 or Figures 2 to 5 Views of wearable electronic devices (200, 300, 400). Figure 6b This illustrates an embodiment according to the present disclosure. Figure 6a Part A is shown as an enlarged view.

[0099] Figure 6aThe lens assembly LA and the display D can be referred to as Figure 5 The lens assembly LA and the display D, and the following references can be omitted. Figure 5 The description is a repetitive description.

[0100] Reference Figure 6a and Figure 6b The wearable electronic device 400 may include a display D and a lens assembly LA, and visual information output from the display D may be focused or guided by the lens assembly LA and provided to the user's eyes Y. The lens assembly LA may include a plurality (e.g., at least three) lenses L1, L2, L3 (e.g., ...) arranged sequentially along the optical axis O. Figure 5 (Lens L1, L2, L3). For ease of description, or as described above, the multiple lenses L1, L2, L3 can be distinguished and described by adding ordinal numbers such as "first" or "second" according to their arrangement in the direction from the user's eye Y toward the display D. In the reference numerals of the figures, "Ln" indicates the nth lens, "En" indicates the user's eye-side surface of the nth lens, and "Dn" may indicate the display-side surface of the nth lens.

[0101] According to an embodiment, the lens assembly LA of the wearable electronic device 400 may include a first polarizing portion P1, a beam splitter BS, and a second polarizing portion P2 arranged sequentially from the user's eye Y side to the display D side. According to an embodiment, the first polarizing portion P1 of the polarizing assembly P (e.g., Figure 5 The first polarization portion P1 can be disposed, for example, on the user eye-side surface E2 of the second lens L2. The second polarization portion P2 of the polarization assembly P (e.g., Figure 5 The second polarization portion P2 can be set on the coverage window W. (See reference...) Figure 6b Beam splitter BS (e.g., Figure 5 The beam splitter 405 can be disposed between the first polarization portion P1 and the second polarization portion P2, for example, disposed on the display-side surface D3 of the third lens L3. In an embodiment, when the first polarization portion P1 is substantially attached to the surface of any one of the lenses L1, L2, L3, the corresponding lens surface (e.g., the user eye-side surface E2 of the second lens L2) can be substantially planar.

[0102] For reference Figure 5As described, light or visual information output from display D can be sequentially transmitted through the second polarization section P2 and the beam splitter BS, and then sequentially reflected by the first polarization section P1 and the beam splitter BS. The light or visual information reflected by the beam splitter BS can be transmitted through the first polarization section P1 and provided to the user. For example, at least a portion of the light or visual information output from display D can be transmitted through the second polarization section P2 and the beam splitter BS and reach the first polarization section P1. The first polarization section P1 at least partially reflects the incident light (e.g., light transmitted through the second polarization section P2 and the beam splitter BS), and the beam splitter BS can again reflect at least a portion of the light reflected by the first polarization section P1 and guide the light to the user's eye Y. Therefore, the visual information output from display D can be reflected at least twice in the path to the user's eye Y. Although lenses L1, L2, and L3 are not mentioned in the description of the travel path of light through polarization sections P1, P2, and / or beam splitter BS, the visual information output from display D can be focused by lenses L1, L2, and L3 in the path to the user's eye Y.

[0103] According to embodiments, "polarizing portion" may be referred to as a polarizing component, polarizing film, polarizer, polarizing layer, modulation component, modulation film, and / or modulation sheet. Here, "modulation" may refer to filtering, reflecting, refracting, modulating the phase, and / or delaying the phase of at least a portion of the incident light. In embodiments, the modulation tendency of the polarizing portion may vary according to the wavelength or polarization component of the incident light. Such a polarizing portion may be implemented by a film, sheet, coating material, and / or deposited material.

[0104] In an embodiment, the second polarization portion P2 may include a second polarizer (e.g., Figure 5 The second polarizer 408) and the second quarter-wave plate (e.g.,) positioned facing the second polarizer 408. Figure 5 The second quarter-wave plate 407. When the second polarizer 408 and the second quarter-wave plate 407 are configured, the polarization axis of the linearly polarized light by the second polarizer 408 and the fast axis of the second quarter-wave plate 407 can form a 45-degree angle. For example, the second polarization portion P2 can be configured to convert linearly polarized light into circularly polarized light. In an embodiment, when the first polarization portion P1 includes the first polarizer 402, the polarization axis of the first polarizer 402 and the polarization axis of the second polarizer 408 can form a 90-degree angle. In an embodiment, the fast axis of the first quarter-wave plate 404 and the fast axis of the second quarter-wave plate 407 can form a 90-degree angle.

[0105] According to an embodiment, the beam splitter BS can be disposed on a surface of the lens closest to the display D (e.g., the display-side surface D3 of the third lens L3). According to an embodiment, the lens surface on which the beam splitter BS is disposed (e.g., the display-side surface D3 of the third lens L3) can be formed aspherical without inflection points, thus ensuring a wide field of view while preventing degradation of optical performance due to abrupt changes in the optical path (e.g., reflection). For example, the beam splitter BS can be stacked or formed on the display-side surface D3 of the third lens L3 by substantially depositing or coating an optical material.

[0106] In embodiments, by including a first polarizing portion P1 serving as a reflecting member and a beam splitter BS, the optical length of the lens assembly LA can become greater than its mechanical (or physical) length, and the number of lenses (or lens surfaces) disposed between the first polarizing portion P1 and the beam splitter BS can be minimized. For example, in a miniaturized lens assembly LA structure, the optical length can be sufficiently ensured by the reflecting member (e.g., the first polarizing portion P1 and the beam splitter BS), and by reducing the number of lenses or lens surfaces disposed between the reflecting member (e.g., the first polarizing portion P1 and the beam splitter BS), an increase in refraction or scattering can be suppressed, and the lens assembly LA can provide an enhanced quality image. In embodiments, the aforementioned "refraction or scattering" may refer to birefringence caused by manufacturing tolerances or errors occurring within permissible limits during the assembly process. For example, by reducing the number of lenses or lens surfaces disposed between the reflecting member (e.g., the first polarizing portion P1 and the beam splitter BS), birefringence of the lens can be suppressed, and the lens assembly LA can provide an enhanced quality image.

[0107] According to the embodiments, including the above Figures 5 to 6b And the description below Figures 7a to 1The entire display device of wearable electronic devices 400, 500, 600, and 700, including the lens assembly LA and the display D, can provide good wide-angle or ultra-wide-angle performance with a field of view (FOV) equal to or greater than about 100, and can have the lens characteristics described below. In an embodiment, the user eye-side surface E1 of the first lens L1 can be formed to bulge towards the user eye Y, thus reducing the thickness (e.g., the thickness in the optical axis O direction) of the structure used to fix the first lens L1 (e.g., the lens barrel), which can contribute to a reduction or thinning of the overall display device including the lens assembly LA and the display D. In an embodiment, the surfaces to which the polarizing portions P1 and P2 of the lenses L1, L2, and L3 are attached can be substantially flat. According to an embodiment, in a structure provided with the polarizing portions P1, P2 and / or the beam splitter BS as described above, one of the at least three lenses L1, L2, and L3 can have an Abbe number of about 40 or less. According to an embodiment, one of the three lenses L1, L2, L3 may have an Abbe number of about 40 or less and negative refractive power, while the other two lenses may have positive refractive power. When at least one of the three lenses L1, L2, L3 is designed to have an Abbe number of about 40 or less and negative refractive power, the chromatic aberration control performance and optical performance of the lens assembly LA of the wearable electronics 400 can be enhanced.

[0108] According to the embodiments, including the above Figures 5 to 6b And the description below Figures 7a to 1 The entire display device of the wearable electronic devices 400, 500, 600, and 700, including the lens assembly LA and the display D, can meet the conditions presented by the following [Formula 1].

[0109] [Formula 1] 1 <DL / EFL<3 Here, DL is the length of the effective pixel area of ​​the display D, and EFL can be the composite focal length of the entire optical system. In this disclosure, "focal length of the entire optical system" can refer to the composite focal length including the display D and the lens assembly LA (or the composite focal length of the entire display device). For example, if the calculated value of [Equation 1] is less than about 1, the display field of view may become smaller, making it difficult to provide good wide-angle or ultra-wide-angle performance, and the product competitiveness of wearable electronic devices may be weakened. For example, if the calculated value of [Equation 1] is greater than about 3, the field of view may become larger than the design value, and the optical performance of the display device may deteriorate compared to the design performance.

[0110] According to an embodiment, the display D and the lens assembly LA (or display device) may have a field of view of approximately 108.00 degrees and a focal length (EFL) of approximately 15.12 mm, and may have an F-number (or Fno) of approximately 3.82. In an embodiment, the length DL of the effective pixel area of ​​the display D may be approximately 24.72 mm, and the DL / EFL value may be approximately 1.63, which satisfies the above [Formula 1].

[0111] In an embodiment, the lens assembly LA (e.g., electronic device 400) may be manufactured according to the specifications presented in [Table 1] and may have aspheric coefficients as shown in [Table 2] and [Table 3]. The definition of asphericity can be calculated using the following [Formula 2]. In [Table 1], “REF.” indicates the aspheric coefficients assigned to… Figure 6a and Figure 6b The reference numerals for lenses L1, L2, L3 and / or polarizing portions P1, P2 are used, and "lens surface (surface)" describes the ordinal number of the lens surface or polarizing portion assigned to transmit (or reflect) visual information, and the ordinal numbers may be assigned sequentially in the direction opposite to the optical path from the display D to the user's eye Y. The "display window" in [Table 1] (e.g., the cover window W in Figure 6) may be a display protective plate that is a substantially transparent plate.

[0112] The aspheric coefficients in [Table 2] or [Table 3] and the tables described below can be calculated from [Formula 2] below.

[0113] [Formula 2]

[0114] In [Formula 2], "z" is the distance from the point on the lens surface where the optical axis O passes along the optical axis O, "y" is the distance from the optical axis O in the direction perpendicular to the optical axis O, "c" is the reciprocal of the radius of curvature at the vertex of the lens, "k" is the conic constant, and "A", "B", "C", "D", "E", "F", "G", "H", "J", "k", "L", "M", "N", and "O" can each represent an aspherical coefficient. The "reciprocal of the radius of curvature" can represent a value indicating the degree of curvature (e.g., curvature) at each point on a curved surface or curve. In the aspherical coefficients of [Formula 2], aspherical coefficients with a value of 0 (zero) can be omitted in [Table 2] or [Table 3] described below.

[0115] [Table 1]

[0116]

[0117] [Table 2]

[0118] [Table 3]

[0119] Figure 7a This illustrates a wearable electronic device 500 according to an embodiment of the present disclosure (e.g., Figure 1 Electronic device 101 or Figures 2 to 5 Views of wearable electronic devices (200, 300, 400). Figure 7b This illustrates an embodiment according to the present disclosure. Figure 7a Part B is shown as an enlarged view.

[0120] Figure 7a The lens assembly LA and the display D can be referred to as Figure 5 The lens assembly LA and the display D. (The following can be omitted as they are referenced above.) Figure 6a and Figure 6b Description of about Figure 7a The description of the lens assembly LA and the display D is repeated.

[0121] According to an embodiment, the lens assembly LA of the wearable electronic device 500 may include a first polarizing portion P1, a beam splitter BS, and a second polarizing portion P2 arranged sequentially from the user's eye Y side to the display D side. According to an embodiment, the first polarizing portion P1 of the polarizing assembly P (e.g., Figure 5 The first polarization portion P1 can be disposed on, for example, the display-side surface D1 of the first lens L1. The second polarization portion P2 of the polarization assembly P (e.g., Figure 5 The second polarizing portion P2 can be disposed on the cover window W. In an embodiment, when the first polarizing portion P1 is substantially attached to the surface of any one of the lenses L1, L2, L3, the corresponding lens surface (e.g., the display-side surface D1 of the first lens L1) can be substantially planar.

[0122] According to an embodiment, the beam splitter BS (e.g., Figure 5 The beam splitter 405 can be disposed between the first polarization portion P1 and the second polarization portion P2. According to an embodiment, refer to... Figure 7bThe beam splitter BS can be disposed on the display-side surface D3 of the third lens L3. For example, the beam splitter BS can be stacked or formed on the display-side surface D3 of the third lens L3 by substantially depositing or coating an optical material. In an embodiment, by providing the first polarizing portion P1 as a reflecting member and the beam splitter BS, the optical length of the lens assembly LA can become greater than the mechanical (or physical) length, and the number of lenses (or lens surfaces) disposed between the first polarizing portion P1 and the beam splitter BS can be minimized. For example, in a miniaturized lens assembly LA structure, the optical length can be sufficiently ensured by the reflecting member (e.g., the first polarizing portion P1 and the beam splitter BS), and by reducing the number of lenses or lens surfaces disposed between the reflecting member (e.g., the first polarizing portion P1 and the beam splitter BS), an increase in refraction or scattering can be suppressed, and the lens assembly LA can provide an enhanced quality image. In an embodiment, the aforementioned "refraction or scattering" may refer to birefringence caused by manufacturing tolerances or errors occurring within permissible limits during the assembly process. For example, by reducing the number of lenses or lens surfaces disposed between the reflecting components (e.g., the first polarizing portion P1 and the beam splitter BS), birefringence of the lens can be suppressed, and the lens assembly LA can provide an image with enhanced quality.

[0123] According to an embodiment, the display D and the lens assembly LA (or display device) may have a field of view of approximately 100.00 degrees and a focal length (EFL) of approximately 14.97 mm, and may have an F number (or Fno) of approximately 3.18. In an embodiment, the length DL of the effective pixel area of ​​the display D may be approximately 23.20 mm, and the DL / EFL value may be approximately 1.55, which satisfies the above [Formula 1].

[0124] In this disclosure, the "length DL of the effective pixel area" of the display D may refer to the height of the display D. Here, the "height of the display D" is... Figure 6a , Figure 7a , Figure 9a and Figure 10a The length indicated as "DL" can also refer to the length of a straight line measured based on an axis perpendicular to the optical axis O.

[0125] In this embodiment, the lens assembly LA can be manufactured according to the specifications presented in [Table 4] and may have the aspheric coefficients of [Table 5] and [Table 6]. In [Table 4], “REF.” indicates the aspheric coefficients assigned to… Figure 7a and Figure 7bThe reference numerals for lenses L1, L2, L3 and / or polarizing portions P1, P2 are specified, and "lens surface (surface)" describes the ordinal number of the lens surface or polarizing portion assigned to transmit (or reflect) visual information, and the ordinal numbers may be assigned sequentially in the direction opposite to the optical path from the display D to the user's eye Y. The "display window" in [Table 4] (e.g., the cover window W in Figure 6) may be a display protective plate that is a substantially transparent plate.

[0126] [Table 4]

[0127]

[0128] [Table 5]

[0129] [Table 6]

[0130] Figure 8 The diagram illustrates the path by which light output from a display in a wearable electronic device 600, according to an embodiment of the present disclosure, is focused or directed to the user's eye Y.

[0131] Figure 8 The descriptions of the first polarization portion P1, the second polarization portion P2, and the beam splitter (BS) 405 can be applied to the above reference. Figure 5 The descriptions of the first polarization portion P1, the second polarization portion P2, and the beam splitter (BS) 405 are described below, and common content may be omitted and the differences may be mainly described.

[0132] According to an embodiment, the arrangement of the polarization portions P1, P2 and / or beam splitter 405 of the polarization component P can provide good image quality while miniaturizing an optical system implemented using a limited number (e.g., at least three) of lenses L1, L2, L3. According to an embodiment, the polarization axis of the first polarizer 402 of the first polarization portion P1 and the polarization axis of the second polarizer 408 of the second polarization portion P2 can form a 90-degree angle. The fast axis of the first quarter-wave plate 404 of the first polarization portion P1 and the fast axis of the second quarter-wave plate 407 of the second polarization portion P2 can form a 90-degree angle. In the following description, references to the antireflective members 401 and 406 may be omitted.

[0133] Reference Figure 8According to an embodiment, the wearable electronic device 600 can operate as follows: Light output from the display D can pass through at least three lenses L1, L2, L3 of the lens assembly LA, the second polarization portion P2, the beam splitter BS, and the first polarization portion P1, and then reach the user's eye Y. In this case, the second polarizer 408 of the second polarization portion P2 transmits a first linear polarization (e.g., vertical polarization (or p-polarization)) and may not transmit a second linear polarization (e.g., horizontal polarization (or s-polarization)). According to an embodiment, light output from the display D can pass through the third lens L3 and reach the second polarizer 408. Of the light reaching the second polarizer 408, only vertical polarization (or p-polarization) may be transmitted. The light transmitted through the second polarizer 408 is converted to circular polarization (right circular polarization or left circular polarization) by the second quarter-wave plate 407, and the circularly polarized light can sequentially pass through the beam splitter 405 and the second lens L2, and then reach the first quarter-wave plate 404. Circularly polarized light arriving at the first quarter-wave plate 404 can be converted back to linearly polarized light (e.g., vertically polarized light (or p-polarized light)) as it passes through the first quarter-wave plate 404 and arrives at the reflecting polarizer 403. Before reaching the reflecting polarizer 403, the light can move in a second direction (display D → user's eye Y). The light arriving at the reflecting polarizer 403 is reflected by the reflecting polarizer 403 and moves in a first direction (user's eye Y → display D), and can be converted to circular polarization (right-hand circular polarization or left-hand circular polarization) as it is transmitted through the first quarter-wave plate 404 again. The circularly polarized light (right-hand circular polarization or left-hand circular polarization) can be reflected by the beam splitter 405 in the second direction, at which point the phase can be shifted (e.g., from left-hand circular polarization to right-hand circular polarization, or from right-hand circular polarization to left-hand circular polarization). The circularly polarized light with the converted phase can pass through the first quarter-wave plate 404 and the reflecting polarizer 403 along the second direction and arrive at the user's eye Y. In this configuration, light transmitted through the first quarter-wave plate 404 can be converted to horizontal polarization (or s-polarization) and reaches the first polarizer 402 of the first polarization section P1. The first polarizer 402 transmits horizontal polarization (or s-polarization) and may not transmit vertical polarization (or p-polarization). Light transmitted through the first polarizer 402 is converted to horizontal polarization (or s-polarization) from the first quarter-wave plate 404 after vertical polarization (or p-polarization) is blocked again, and can reach the user's eye Y. However, Figure 8 The embodiments illustrate the changes in the state of light passing through the wearable electronic device 600 according to the embodiments, and it should be noted that the conversion of polarization components by the reflective polarizer 403, quarter-wave plates 404, 407, beam splitter 405 and / or second polarizer 408 may differ from the described embodiments.

[0134] Figure 9a This illustrates a wearable electronic device 600 according to an embodiment of the present disclosure (e.g., Figure 1 Electronic device 101 or Figure 8 A view of the wearable electronic device (600). Figure 9b This illustrates an embodiment according to the present disclosure. Figure 9a Part C is shown as an enlarged view.

[0135] Figure 9a The lens assembly LA and the display D can be referred to as Figure 8 The lens assembly LA and the display D. (The following can be omitted as they are referenced above.) Figure 6a and Figure 6b Description of about Figure 9a The description of the lens assembly LA and the display D is repeated.

[0136] According to an embodiment, the lens assembly LA of the wearable electronic device 600 may include a first polarizing portion P1, a beam splitter BS, and a second polarizing portion P2 arranged sequentially from the user's eye Y side to the display D side. According to an embodiment, the first polarizing portion P1 of the polarizing assembly P (e.g., Figure 8 The first polarization portion P1 can be disposed on the display-side surface D1 of the first lens L1. The second polarization portion P2 of the polarization assembly P (e.g., Figure 8 The second polarizing portion P2 can be disposed on the user eye-side surface E3 of the third lens L3. In an embodiment, when the first polarizing portion P1 is substantially attached to the surface of any one of the lenses L1, L2, L3, the corresponding lens surface (e.g., the display-side surface D1 of the first lens L1 and / or the user eye-side surface E3 of the third lens L3) can be substantially planar.

[0137] According to an embodiment, the beam splitter BS (e.g., Figure 8 The beam splitter 405 can be disposed between the first polarization portion P1 and the second polarization portion P2. According to an embodiment, refer to... Figure 9b The beam splitter BS can be disposed on the display-side surface D2 of the second lens L2. For example, the beam splitter BS can be formed on the display-side surface D2 of the second lens L2 by substantially depositing or coating an optical material.

[0138] According to an embodiment, the display D and the lens assembly LA (or display device) may have a field of view of approximately 108.00 degrees and a focal length (EFL) of approximately 14.61 mm, and may have an F-number (or Fno) of approximately 3.18. In an embodiment, the length DL of the effective pixel area of ​​the display D may be approximately 24.54 mm, and the DL / EFL value may be approximately 1.68, which satisfies the above [Formula 1].

[0139] In this embodiment, the lens assembly LA can be manufactured according to the specifications presented in [Table 7] and may have the aspheric coefficients of [Table 8] and [Table 9]. In [Table 7], “REF.” indicates the aspheric coefficients assigned to… Figure 9a and Figure 9b The reference numerals for lenses L1, L2, L3 and / or polarizing portions P1, P2 are specified, and "lens surface (surface)" describes the ordinal number of the lens surface or polarizing portion assigned to transmit (or reflect) visual information, and the ordinal numbers may be assigned sequentially in the direction opposite to the optical path from the display D to the user's eye Y. The "display window" in [Table 7] (e.g., the cover window W in Figure 6) may be a display protective plate that is a substantially transparent plate.

[0140] [Table 7]

[0141] [Table 8]

[0142] [Table 9]

[0143] Figure 10a This illustrates a wearable electronic device 700 according to an embodiment of the present disclosure (e.g., Figure 1 Electronic device 101 or Figure 8 A view of the wearable electronic device (600). Figure 10b This illustrates an embodiment according to the present disclosure. Figure 10a The view shown is a magnified view of part G.

[0144] Figure 10a The lens assembly LA and the display D can be referred to as Figure 8 The lens assembly LA and the display D. (The following can be omitted as they are referenced above.) Figure 6a and Figure 6b Description of about Figure 10a The description of the lens assembly LA and the display D is repeated.

[0145] According to an embodiment, the lens assembly LA of the wearable electronic device 700 may include a first polarizing portion P1, a beam splitter BS, and a second polarizing portion P2 arranged sequentially from the user's eye Y side to the display D side. According to an embodiment, the first polarizing portion P1 of the polarizing assembly P (e.g., Figure 8 The first polarization portion P1 can be disposed on the display-side surface D1 of the first lens L1. According to an embodiment, the second polarization portion P2 of the polarization component P (e.g., Figure 8The second polarizing portion P2 can be disposed on the display-side surface D3 of the third lens L3. In an embodiment, when the first polarizing portion P1 is substantially attached to the surface of any one of the lenses L1, L2, L3, the corresponding lens surface (e.g., the display-side surface D1 of the first lens L1 and / or the display-side surface D3 of the third lens L3) can be substantially planar.

[0146] According to an embodiment, the beam splitter BS (e.g., Figure 8 The beam splitter 405 can be disposed between the first polarization portion P1 and the second polarization portion P2. According to an embodiment, refer to... Figure 10b The beam splitter BS can be disposed on the display-side surface D2 of the second lens L2. For example, the beam splitter BS can be formed on the display-side surface D2 of the second lens L2 by substantially depositing or coating an optical material.

[0147] According to an embodiment, the display D and the lens assembly LA (or display device) may have a field of view of approximately 105.00 degrees and a focal length (EFL) of approximately 19.67 mm, and may have an F number (or Fno) of approximately 3.18. In an embodiment, the length DL of the effective pixel area of ​​the display D may be approximately 32.91 mm, and the DL / EFL value may be approximately 1.67, which satisfies the above [Formula 1].

[0148] In this embodiment, the lens assembly LA can be manufactured according to the specifications presented in [Table 10] and may have the aspheric coefficients shown in [Table 11]. In [Table 10], “REF.” indicates the aspheric coefficients assigned to… Figure 10a and Figure 10b The reference numerals for lenses L1, L2, L3 and / or polarizing portions P1, P2 are used, and "lens surface (surface)" describes the ordinal number of the lens surface or polarizing portion assigned to transmit (or reflect) visual information, and the ordinal numbers may be assigned sequentially in the direction opposite to the optical path from the display D to the user's eye Y. The "display window" in [Table 10] (e.g., the cover window W in FIG6) may be a display protective plate that is a substantially transparent plate.

[0149] [Table 10]

[0150] [Table 11]

[0151] Lens assembly according to embodiments of the present disclosure (e.g., Figure 5 , Figure 6a , Figure 7a , Figure 8 , Figure 9a and Figure 10aThe lens assembly LA) and / or wearable electronics that include the lens assembly (e.g., Figure 1 Electronic device 101 Figure 5 , Figure 6a , Figure 7a , Figure 8 , Figure 9a and Figure 10a Wearable electronic devices (400, 500, 600, 700) can meet at least some of the above specifications or conditions, and therefore can be reduced in size while facilitating aberration control and achieving good image quality. For example, even when worn on a user's head or face, the lens assembly and / or the wearable electronic device including the lens assembly can reduce user fatigue.

[0152] However, the purpose of this disclosure may be determined differently without departing from the spirit and scope of this disclosure. The effects obtainable from this disclosure are not limited to those described above, and various effects, directly or indirectly determined by this document, may be provided.

[0153] According to embodiments of this disclosure, a display device may be provided. The display device may include: a display D configured to output light; and a lens assembly LA configured to guide light output from the display toward a user's eye Y. The lens assembly may include at least three lenses L1, L2, L3 arranged sequentially along the optical axis O from the user's eye side to the display side, and a polarization assembly. The polarization assembly may include a first polarization portion P1, a beam splitter (BS) 405, and a second polarization portion P2 arranged sequentially from the user's eye side to the display side. The at least three lenses of the lens assembly may include a synthetic resin. At least one of the at least three lenses may have an Abbe number of 40 or less and negative refractive power. The beam splitter of the polarization assembly may include a reflective surface formed as an aspherical surface without an inflection point. The display device may satisfy the following [Formula 1].

[0154] [Formula 1] 1 <DL / EFL<3 (Where, DL is the length of the effective pixel area of ​​the display, and EFL is the composite focal length of the entire optical system (or the composite focal length of the entire display device)). According to an embodiment, the field of view (FOV) of the display device may be equal to or greater than 100 degrees.

[0155] According to an embodiment, at least one of the user eye-side surface or the display-side surface of the first polarization portion is configured as a plane, and at least one of the user eye-side surface or the display-side surface of the second polarization portion can be configured as a plane.

[0156] According to an embodiment, the polarization component may be disposed between the display and the first lens L1, which is the farthest from the display among at least three lenses.

[0157] According to an embodiment, the polarization component may be disposed between the first lens L1, which is the farthest from the display, and the third lens L3, which is the closest to the display, among at least three lenses.

[0158] According to an embodiment, the polarization component can be configured to reflect light output from the display at least twice between the first lens L1, which is furthest from the display among at least three lenses, and the lens L3, which is closest to the display among at least three lenses.

[0159] According to an embodiment, the first polarization portion may include a first polarizer 402, a first reflective polarizer 403, and a first quarter-wave plate 404. The second polarization portion may include a second polarizer 408 and a second quarter-wave plate 407.

[0160] According to an embodiment, the first polarizer, the first reflective polarizer, and the first quarter-wave plate of the first polarization portion may be combined with each other or spaced apart from each other using at least one of the following: another polarization layer, an air layer, or a virtual layer.

[0161] According to an embodiment, the second polarizer and the second quarter-wave plate of the second polarization portion can be combined with each other or spaced apart from each other using at least one of the following: another polarization layer, an air layer, or a virtual layer.

[0162] According to an embodiment, the polarization axes of the first polarizer and the second polarizer can form a 90-degree angle. The fast axis of the first quarter-wave plate and the fast axis of the second quarter-wave plate can also form a 90-degree angle.

[0163] According to an embodiment, at least one of the first polarization portion or the second polarization portion includes antireflective layers 401 and 406.

[0164] According to an embodiment, the first polarization portion may be disposed between the first lens L1, which is farthest from the display, and the second lens L2, which is second closest to the display, among at least three lenses. The second polarization portion may be disposed between the lens L3, which is closest to the display, and the display.

[0165] According to an embodiment, the beam splitter may be disposed on the display-side surface of the lens L3, which is closest to the display among at least three lenses.

[0166] According to an embodiment, the first polarization portion may be disposed between the first lens L1, which is farthest from the display, and the second lens L2, which is second closest to the display, among at least three lenses. The second polarization portion may be disposed between the lens L3, which is closest to the display, and the second lens L2, among at least three lenses.

[0167] According to an embodiment, the beam splitter may be disposed on the display-side surface of the second lens L2.

[0168] According to embodiments of this disclosure, a wearable electronic device may be provided. The wearable electronic device may include: a display D configured to output light; at least three lenses L1, L2, L3 sequentially arranged along optical axis O from the user's eye side to the display side; and a polarization assembly P configured to reflect light output from the display at least twice between a first lens L1, the lens furthest from the display among the at least three lenses, and a lens L3, the lens closest to the display among the at least three lenses. The polarization assembly may include a first polarization portion P1, a beam splitter (BS) 405, and a second polarization portion P2 sequentially arranged from the user's eye side to the display side. The at least three lenses of the lens assembly may include a synthetic resin. At least one of the at least three lenses may have an Abbe number of 40 or less and negative refractive power. The beam splitter of the polarization assembly may include a reflective surface formed as an aspherical surface without an inflection point. The wearable electronic device may satisfy the following [Formula 1].

[0169] [Formula 1] 1 <DL / EFL<3 (Where, DL is the length of the effective pixel area of ​​the display, and EFL is the composite focal length of the entire optical system.) According to an embodiment, the field of view (FOV) of the display device may be equal to or greater than 100 degrees.

[0170] According to an embodiment, the polarization component may be disposed between the display and the first lens L1, which is the farthest from the display among at least three lenses.

[0171] At least one of the user eye-side surface or the display-side surface of the first polarization portion is configured as a plane, and at least one of the user eye-side surface or the display-side surface of the second polarization portion can be configured as a plane.

[0172] According to an embodiment, the first polarization portion may include a first polarizer 402, a first reflective polarizer 403, and a first quarter-wave plate 404. The second polarization portion may include a second polarizer 408 and a second quarter-wave plate 407.

[0173] According to an embodiment, the first polarizer, the first reflective polarizer, and the first quarter-wave plate of the first polarization portion can be combined with each other or spaced apart by at least one of another polarization layer, an air layer, or a dummy layer between them. The second polarizer and the second quarter-wave plate of the second polarization portion can be combined with each other or spaced apart by at least one of another polarization layer, an air layer, or a dummy layer between them.

[0174] Although this disclosure has been described by way of illustrated embodiments, it should be understood that the embodiments are for illustrative purposes and are not intended to limit the disclosure. It will be apparent to those skilled in the art that various changes in form and detail may be made to the full scope of this disclosure (including the appended claims and their equivalents) without departing from the spirit and scope of this disclosure.

[0175] The electronic device according to embodiments of this disclosure can be one of various types of electronic devices. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. According to embodiments of this disclosure, the electronic device is not limited to those described above.

[0176] The embodiments of this disclosure and the terminology used therein are not intended to limit the technical features described herein to particular embodiments, but should be understood to include various modifications, equivalents, or substitutions of the embodiments. Similar reference numerals may be used for similar or related components in the description of the drawings. It will be understood that, unless the relevant context explicitly indicates otherwise, the singular form of a noun corresponding to an item may include one or more things. As used herein, each of the 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” may include all possible combinations of the items enumerated together with the corresponding phrase among the plurality of phrases. As used herein, terms such as “first” and “second” or “first” and “second” may be used to simply distinguish one component from another and do not limit the components in other respects (e.g., importance or order). It will be understood that, whether or not the terms “operably” or “communically” are used, if an element (e.g., a first element) is referred to as being “combined” with, “combined to”, “connected to”, or “attached to” another element (e.g., a second element), it means that the first element can be directly (e.g., wiredly) connected to, wirelessly connected to, or combined with the other element via a third element.

[0177] As used herein, the term "module" can include units implemented in hardware, software, or firmware, and is used interchangeably with other terms such as "logic," "logic block," "part," or "circuit." A module can be a single integrated component adapted to perform one or more functions, or the smallest unit or part of such a single integrated component. For example, according to embodiments, modules can be implemented in the form of application-specific integrated circuits (ASICs).

[0178] Embodiments of this disclosure can be implemented as software (e.g., program 140) including 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) can invoke and execute at least one of the one or more instructions stored in the storage medium, with or without the use of one or more other components, under the control of the processor. This allows the machine to be operated to perform at least one function according to the invoked at least one instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, the term "non-transitory" simply means that the storage medium is a tangible device and does not include signals (e.g., electromagnetic waves), but the term does not distinguish whether data is stored semi-permanently or temporarily in the storage medium.

[0179] According to embodiments, the methods according to embodiments of this disclosure may be included and incorporated into a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., a read-only optical disc (CD-ROM)) or via an app store (e.g., the Play Store). TM Online distribution (e.g., download or upload) or direct distribution between two user devices (e.g., smartphones). If distributed online, at least a portion of the computer program product may be temporarily generated or at least temporarily stored in a machine-readable storage medium (such as the memory of a manufacturer's server, an app store's server, or a relay server).

[0180] According to embodiments, each component (e.g., a module or program) described above may include a single entity or multiple entities. Some of the multiple entities may be individually located in different components. According to embodiments, one or more of the components described above may be omitted, or one or more other components may be added. Optionally or additionally, multiple components (e.g., modules or programs) may be integrated into a single component. In this case, according to various embodiments, the integrated component may still perform one or more functions of the corresponding components in the multiple components in the same or similar manner as each of the multiple components performed its function before integration. According to various embodiments, operations performed by a module, program, or other component may be performed sequentially, in parallel, repeatedly, or heuristically, or may be run in a different order or one or more operations may be omitted, or one or more other operations may be added.

Claims

1. A display device, comprising: The display (D) is configured to output light; as well as A lens assembly (LA) is configured to direct light emitted from the display toward the user's eye (Y), the lens assembly comprising: At least three lenses (L1, L2, L3) are arranged sequentially along the optical axis (O) from the user's eye side to the display side; and The polarization assembly (P) includes a first polarization portion (P1), a beam splitter (BS; 405), and a second polarization portion (P2) arranged sequentially from the user's eye side to the display side. The at least three lenses of the lens assembly comprise synthetic resin. Wherein, at least one of the at least three lenses has an Abbe number of 40 or less and has negative refractive power. The beam splitter of the polarization component includes a reflective surface formed as an aspherical surface without inflection points, and The display device satisfies the following [Formula 1], [Formula 1] 1 <DL / EFL<3 Wherein, DL is the length of the effective pixel area of ​​the display, and EFL is the composite focal length of the entire optical system.

2. The display device as claimed in claim 1, wherein, The field of view (FOV) of the display device is equal to or greater than 100 degrees.

3. The display device as claimed in claim 1 or claim 2, wherein, At least one of the user eye-side surface or the display-side surface of the first polarization portion is configured as a plane, and at least one of the user eye-side surface or the display-side surface of the second polarization portion is configured as a plane.

4. The display device according to any one of claims 1 to 3, wherein, The polarization component is disposed between the display and the first lens (L1) that is furthest from the display among the at least three lenses.

5. The display device according to any one of claims 1 to 4, wherein, The polarization component is positioned between the first lens (L1) that is furthest from the display among the at least three lenses and the third lens (L3) that is closest to the display among the at least three lenses.

6. The display device according to any one of claims 1 to 5, wherein, The polarization component is configured to reflect light output from the display at least twice between the first lens (L1) furthest from the display among the at least three lenses and the lens (L3) closest to the display among the at least three lenses.

7. The display device according to any one of claims 1 to 6, wherein, The first polarization section includes a first polarizer (402), a first reflective polarizer (403), and a first quarter-wave plate (404), and The second polarization section includes a second polarizer (408) and a second quarter-wave plate (407).

8. The display device as claimed in claim 7, wherein, The first polarizer, the first reflective polarizer, and the first quarter-wave plate of the first polarization portion are combined with each other or spaced apart by at least one of the following: another polarization layer, an air layer, or a virtual layer.

9. The display device as claimed in claim 7 or claim 8, wherein, The second polarizer and the second quarter-wave plate of the second polarization portion are combined with each other or spaced apart by at least one of the following: another polarization layer, an air layer or a virtual layer.

10. The display device according to any one of claims 7 to 9, wherein, The polarization axes of the first polarizer and the second polarizer form a 90-degree angle, and the fast axis of the first quarter-wave plate and the fast axis of the second quarter-wave plate form a 90-degree angle.

11. The display device according to any one of claims 1 to 10, wherein, At least one of the first polarization portion or the second polarization portion includes an anti-reflection layer (401; 406).

12. The display device according to any one of claims 1 to 11, wherein, The first polarizing portion is positioned between the first lens (L1) that is furthest from the display among the at least three lenses and the second lens (L2) that is second closest to the display among the at least three lenses, and... The second polarizing portion is disposed between the lens (L3) closest to the display among the at least three lenses and the display.

13. The display device as claimed in claim 12, wherein, The beam splitter is disposed on the display-side surface of the lens (L3) that is closest to the display among the at least three lenses.

14. The display device according to any one of claims 1 to 11, wherein, The first polarizing portion is positioned between the first lens (L1) furthest from the display and the second lens (L2) closest to the display, among the at least three lenses. The second polarizing portion is disposed between the lens (L3) closest to the display and the second lens (L2) among the at least three lenses.

15. The display device as claimed in claim 14, wherein, The beam splitter is disposed on the display-side surface of the second lens (L2).

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