Wearable electronic device comprising lens assembly

Abstract

A lens assembly is provided. The lens assembly comprises: a first lens which has positive refractive power, is fixed in position, and has a first film layer attached on one surface thereof; a second lens which has positive refractive power and is movable in position on the basis of the optical axis; and a third lens which has positive refractive power and is movable in position on the basis of the optical axis along with the second lens, wherein at least one of the second lens and the third lens has a mirror coating layer disposed on one surface thereof facing a display, the first lens, the second lens, and the third lens are sequentially arranged along the optical axis from the side of the eye of a user toward the display, and a ratio between a distance from the surface of the first lens at the side of the user's eye to an imaging surface of the display and a distance from the surface of the second lens at the side of the user's eye to the imaging surface of the display can satisfy the condition 1.55 > Tdiopter / TTL, where TTL denotes the distance from the surface of the first lens at the side of the user's eye to the imaging surface of the display, and Tdiopter denotes the distance from the surface of the second lens at the side of the user's eye to the imaging surface of the display.

Description

Wearable electronic device comprising a lens assembly

[0001] The present disclosure relates to a wearable electronic device including a lens assembly.

[0002] Portable electronic devices, such as electronic notebooks, portable multimedia players, mobile communication terminals, or tablet PCs, typically feature display elements and batteries, and typically have bar-shaped, folder-shaped, or sliding-type appearances due to the shape of the display elements or batteries. Recently, as the performance of display elements and batteries has improved, they have become smaller, leading to the emergence of electronic devices that can be worn on parts of the body, such as the wrist or head, or as clothing (hereinafter referred to as "wearable electronic devices").

[0003] Examples of wearable electronic devices include head-mounted devices (HMDs), smart glasses, smartwatches (or bands), contact lenses, rings, or clothing / shoe / glove devices. These body-worn electronic devices are easy to carry and can enhance user accessibility.

[0004] For example, a 'head-mounted wearable device' is a device worn on the user's head or face, and is a device that projects an image onto the user's retina to enable the user to view a virtual image in a three-dimensional space. Head-mounted wearable devices can be divided into see-through types that provide augmented reality (AR) and see-closed types that provide virtual reality (VR). A see-through type head-mounted wearable device can be implemented in the form of glasses, for example, and can provide the user with information about buildings or objects in the space within the user's field of vision in the form of images or text. A see-closed type head-mounted wearable device can output independent images to both eyes of the user, and can provide the user, or one person, with an excellent sense of immersion by outputting content (games, movies, streaming, or broadcasting) provided by a mobile communication terminal or an external input in the form of images or audio. Additionally, head-mounted wearable devices may be used to provide mixed reality (MR) or extended reality (XR), which are a combination of augmented reality (AR) and virtual reality (VR).

[0005] Recently, product development for head-mounted wearable devices has been actively underway, and they are being used for a variety of purposes, including military, gaming, industrial, and medical applications. Consequently, there is a growing demand for head-mounted wearable devices that are smaller and lighter while also providing superior image quality.

[0006] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above is applicable as prior art related to the present disclosure.

[0007] Aspects of the present disclosure are intended to address at least the aforementioned problems and / or disadvantages and provide at least the advantages described below. Accordingly, one aspect of the present disclosure provides a wearable electronic device including a lens assembly.

[0008] Additional aspects are partly explained in the detailed description which follows, will become apparent from the detailed description, or may be learned by practice of the embodiments presented.

[0009] According to one embodiment of the present disclosure, a lens assembly is provided. The lens assembly includes a first lens having a positive refractive power and a fixed position, a second lens having a positive refractive power and being movable in position relative to an optical axis, and a third lens having a positive refractive power and being movable in position relative to the optical axis together with the second lens, wherein a first film layer is disposed between the first lens and the second lens, and at least one of the second lens and the third lens has a mirror coating layer disposed on a surface facing a display, and the first lens, the second lens, and the third lens are sequentially disposed along the optical axis from a side of a user's eye toward the display, and a ratio of a distance from a side of a user's eye of the first lens to an imaging surface of the display and a distance from a side of a user's eye of the second lens to an imaging surface of the display is 1.55 > T. diopter / TTL condition is satisfied, where 'TTL (total track length)' represents the distance from the user's eye side of the first lens to the image plane of the display, and 'T diopter ' represents the distance from the user's eye side of the second lens to the image plane of the display.

[0010] According to another embodiment of the present disclosure, a wearable electronic device is provided. The wearable electronic device includes a lens assembly having at least three lenses aligned along an optical axis from a user's eye side toward a display, the lens assembly including: a first lens closest to the user's eye side, having positive refractive power, and having a fixed position, the first lens having a first film layer attached to one surface of the first lens; a second lens having positive refractive power and being movable in position relative to the optical axis; and a third lens having positive refractive power and being movable in position relative to the optical axis together with the second lens, wherein at least one of the second lens and the third lens may have a mirror coating layer disposed on one surface facing the display.

[0011] Other aspects, advantages and salient features of the present disclosure will become apparent to those skilled in the art from the following detailed description of various embodiments of the present disclosure taken in conjunction with the accompanying drawings.

[0012] The above-described aspects or other aspects, configurations and / or advantages of one embodiment of the present disclosure may be further clarified by the following detailed description taken in conjunction with the accompanying drawings.

[0013] FIG. 1 is a diagram illustrating a wearable electronic device according to one embodiment of the present disclosure.

[0014] FIG. 2A is a drawing showing the front side of a wearable electronic device according to one embodiment of the present disclosure.

[0015] FIG. 2b is a drawing showing the back of a wearable electronic device according to one embodiment of the present disclosure.

[0016] FIG. 3 illustrates a state in which light output from a display according to one embodiment of the present disclosure is transmitted to a user's eyes.

[0017] FIG. 4 is a drawing showing a lens assembly (200) when the diopter is 0 according to one embodiment of the present disclosure.

[0018] FIG. 5 is a drawing showing a lens assembly (200) when the diopter is -6 according to one embodiment of the present disclosure.

[0019] FIG. 6A is a graph showing spherical aberration of a lens assembly according to one embodiment of the present disclosure.

[0020] FIG. 6b is a graph showing astigmatism of a lens assembly according to one embodiment of the present disclosure.

[0021] FIG. 6c is a graph showing the distortion aberration of a lens assembly according to one embodiment of the present disclosure.

[0022] FIG. 7a is a graph showing spherical aberration of a lens assembly according to one embodiment of the present disclosure.

[0023] FIG. 7b is a graph showing astigmatism of a lens assembly according to one embodiment of the present disclosure.

[0024] FIG. 7c is a graph showing the distortion aberration of a lens assembly according to one embodiment of the present disclosure.

[0025] FIG. 8 is a drawing showing a lens assembly (300) when the diopter is 0 according to one embodiment of the present disclosure.

[0026] FIG. 9 is a drawing showing a lens assembly (300) when the diopter is -6 according to one embodiment of the present disclosure.

[0027] FIG. 10A is a graph showing spherical aberration of a lens assembly according to one embodiment of the present disclosure.

[0028] FIG. 10b is a graph showing astigmatism of a lens assembly according to one embodiment of the present disclosure.

[0029] FIG. 10c is a graph showing the distortion aberration of a lens assembly according to one embodiment of the present disclosure.

[0030] FIG. 11A is a graph showing spherical aberration of a lens assembly according to one embodiment of the present disclosure.

[0031] FIG. 11b is a graph showing astigmatism of a lens assembly according to one embodiment of the present disclosure.

[0032] FIG. 11c is a graph showing the distortion aberration of a lens assembly according to one embodiment of the present disclosure.

[0033] FIG. 12 is a block diagram of an electronic device within a network environment according to one embodiment of the present disclosure.

[0034] FIG. 13 is a block diagram illustrating a camera module according to one embodiment of the present disclosure.

[0035] The same reference numbers are used to designate identical components throughout the drawings.

[0036] To facilitate a comprehensive understanding of the various embodiments of the present disclosure defined by the claims and their equivalents, the following description is provided with reference to the accompanying drawings. While including various specific details to aid understanding, these are to be considered merely illustrative. Accordingly, those skilled in the art will recognize that various modifications and variations can be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. Furthermore, descriptions of well-known functions and configurations may be omitted for clarity and conciseness.

[0037] The terms and words used in the following description and claims are not limited to their dictionary meanings, but are used to facilitate a clear and consistent understanding of the present disclosure by the inventors. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the disclosure is provided for illustrative purposes only, and not for the purpose of limiting the present disclosure, which is defined by the appended claims and their equivalents.

[0038] Unless the context clearly dictates otherwise, the singular forms "a," "an," and "the" are understood to include plural references. For example, reference to "a component surface" includes reference to one or more of those surfaces.

[0039] Electronic devices according to the embodiments disclosed in this document may take various forms. 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. Electronic devices according to the embodiments disclosed in this document are not limited to the aforementioned devices.

[0040] The embodiments of this document and the terminology used herein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. In this document, 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 any one of the items listed together with the corresponding phrase among the phrases, or all possible combinations thereof. Terms such as "first", "second", or "first" or "second" may be used simply to distinguish the corresponding component from other corresponding components and do not limit the corresponding components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as being "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0041] The term "module" used in one embodiment of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0042] According to one embodiment, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to other embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to one embodiment, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0043] It should be noted that the blocks and combinations of flowcharts within each flowchart can be executed by one or more computer programs containing instructions. The one or more computer programs may be stored entirely in a single memory device, or the one or more computer programs may be divided into different portions stored in multiple different memory devices.

[0044] Any of the functions or operations described herein may be processed by a single processor or a combination of processors. A single processor or a combination of processors is a circuit that performs processing and includes circuits such as an application processor (e.g., a central processing unit (CP), a communication processor (CP), a modem, a graphics processing unit (GPU), a neural processing unit (NPU)) (e.g., an artificial intelligence (AI) chip, a Wi-Fi chip, a Bluetooth® chip, a global positioning system (GPS) chip, a near-field communication (NFC) chip, a connectivity chip, a sensor controller, a touch controller, a fingerprint sensor controller, a display driver integrated circuit (IC), an audio codec chip, a universal serial bus (USB) controller, a camera controller, an image processing IC, a microprocessor unit (MPU), a system on a chip (SoC), an integrated circuit (IC), and the like.

[0045] FIG. 1 illustrates a wearable electronic device according to one embodiment of the present disclosure.

[0046] Referring to FIG. 1, a wearable electronic device (100) is an electronic device in the form of glasses, and a user can visually recognize surrounding objects or environments even while wearing the wearable electronic device (100). The wearable electronic device (100) can, for example, use a camera module to acquire and / or recognize visual images of objects or environments viewed by the user or in the direction in which the wearable electronic device (100) is directed, and can receive information about the objects or environments from an external electronic device via a network. The wearable electronic device (100) can provide the user with the information about the objects or environments received in an acoustic or visual form. In one embodiment, the wearable electronic device (100) can provide the user with the information about the objects or environments received in a visual form through a display member using a display module. By visualizing information about objects or environments and combining it with actual images (or videos) of the user's surroundings, the wearable electronic device (100) can implement augmented reality (AR), virtual reality (VR), mixed reality (MR), and / or extended reality (XR). The display member can provide the user with information about objects or environments around him / her by outputting a screen in which an augmented reality object is added to an actual image (or video) of the user's surroundings.

[0047] In the detailed description below, various references may be made to "a state or position in which an electronic device or a designated component of an electronic device faces the user's face," and it should be noted that this is based on the assumption that the user is wearing the wearable electronic device (100).

[0048] In one embodiment, the wearable electronic device (100) may include at least one display member, a lens frame, and a wearing member. The display members may be provided as a pair including a first display member and a second display member, and may be arranged to correspond to the user's right eye and left eye, respectively, when the wearable electronic device (100) is worn on the user's body. In one embodiment, the wearable electronic device (100) may also include a housing form (e.g., a goggle form) including one display member corresponding to the right eye and one to the left eye.

[0049] According to another embodiment, the display member is a component provided to provide visual information to a user, and may include, for example, a lens assembly, a display (D), and at least one sensor. The lens assembly and the display (D) may each be formed transparently or translucently. However, the display member is not limited thereto. As another example, the display member may include a window member, and the window member may be a translucent glass or a member whose light transmittance can be adjusted by adjusting the tinting concentration. As another example, the display member may include a lens including a waveguide or a reflective lens, and an image output from an optical output device (e.g., a projector) is formed on each of the lenses, thereby providing visual information to the user. For example, the display member may include a waveguide (e.g., a light waveguide) in at least a portion of each of the lenses, and may mean a display that transmits an image (or light) output from a light output device to the user's eyes through the waveguide included in the display member, and at the same time transmits the real world to the user's eyes through that area in a see-through manner. The lens assembly (e.g., the lens assembly (200, 300) of FIGS. 4, 5, 6A to 6C, 7A to 7C, 8, 9, 10A to 10C, and 11A to 11C) is a configuration including a plurality of lenses (e.g., L1, L2, L3), and may be arranged in a state aligned with the optical axis (OI) in the space within the wearable electronic device (100). In describing one embodiment of the present disclosure, some numerical values ​​may be presented, but it should be noted that such numerical values ​​do not limit one embodiment of the present disclosure unless stated in the claims.

[0050] FIG. 2A is a drawing showing the front side of a wearable electronic device according to one embodiment of the present disclosure.

[0051] FIG. 2b is a drawing showing the back of a wearable electronic device according to one embodiment of the present disclosure.

[0052] The wearable electronic device (100) may be AR glasses or VST (video see-through) type VR glasses. In one embodiment, VST type VR glasses may capture images of the external environment using a camera (not shown) and display the captured images of the external environment along with VR content to the user through a display (D). For example, the VR content may be content such as navigation or data related to a specific object.

[0053] Referring to FIGS. 2A and 2B, in one embodiment, camera modules (111, 112, 113, 114, 115, 116) and / or depth sensors (117) for obtaining information related to the surrounding environment of the wearable electronic device (100) may be arranged on the first surface (110) of the housing.

[0054] In one embodiment, the camera modules (111, 112) can acquire images related to the environment surrounding the wearable electronic device.

[0055] In another embodiment, the camera modules (113, 114, 115, 116) can acquire images while the wearable electronic device is worn by a user. The camera modules (113, 114, 115, 116) can be used for hand detection and tracking, and user gesture (e.g., hand movement) recognition. The camera modules (113, 114, 115, 116) can be used for 3DoF (degrees of freedom), 6DoF head tracking, position (spatial, environmental) recognition, and / or movement recognition. In one embodiment, the camera modules (111, 112) can also be used for hand detection and tracking, and user gesture.

[0056] The depth sensor (117) can be configured to transmit a signal and receive a signal reflected from the user's eye, and can be used for purposes such as time of flight (TOF) to determine the distance to an object.

[0057] According to one embodiment, a camera module (125, 126) for facial recognition and / or a display (121) (and / or a lens) may be arranged on the second side (120) of the housing.

[0058] In another embodiment, a face recognition camera module (125, 126) adjacent to the display may be used to recognize the user's face, or may recognize and / or track the user's two eyes.

[0059] In one embodiment, the display (121) (and / or lens) may be disposed on the second side (120) of the wearable electronic device (100). In one embodiment, the wearable electronic device (100) may not include the camera modules (115, 116) among the plurality of camera modules (113, 114, 115, 116). The wearable electronic device (100) may omit at least one of the configurations illustrated in FIGS. 2A and 2B or may further include a configuration not illustrated in the drawings. For example, the wearable electronic device (100) may omit at least one of the camera modules or may include a greater number of camera modules.

[0060] According to one embodiment, a wearable electronic device (100) may have a form factor for being worn on a user's head. The wearable electronic device (100) may further include a strap and / or a wearing member for being secured to a body part of the user. The wearable electronic device (100) may provide a user experience based on augmented reality, virtual reality, and / or mixed reality while being worn on the user's head.

[0061] FIG. 3 illustrates a state in which light output from a display (D) according to one embodiment of the present disclosure is transmitted to a user's eye.

[0062] The wearable electronic device (100) of the present disclosure may include a lens assembly (200), at least one film layer (F1, F2), and at least one mirror coating layer (105). The wearable electronic device (100) of the present disclosure may provide a vision correction function to a user by, for example, allowing at least some of the lenses to be movable to adjust the diopter, while providing at least one film layer (F1, F2) and at least one mirror coating layer (105) to extend and / or adjust the optical path length of light, thereby adjusting the focal length or improving the quality of the output image. A detailed description of the lens assembly (200) will be described in detail through embodiments of FIG. 4 and below, and other components included in the wearable electronic device (100), for example, at least one film layer (F1, F2) and at least one mirror coating layer (105), will be described in detail.

[0063] The wearable electronic device (100) of the present disclosure may be an optical device (e.g., AR / VR glasses) that is equipped with a display (D) and a lens assembly (200) including a plurality of lenses to form an optical system. Here, the lens assembly (200) may include a plurality of lenses (e.g., three lenses) (e.g., L1, L2, L3). The display (D) may include a screen display area that displays visual information to a portion corresponding to both eyes of a user when the user wears the wearable electronic device (100). The display (D) may include, for example, a liquid crystal display (LCD), a light emitting diode (LED) display, an organic light emitting diode (OLED) display, a micro electro mechanical system (MEMS) display, or an electronic paper display. The display (D) may display, for example, various contents (e.g., text, images, videos, icons, or symbols) to a user.

[0064] Before the various contents (e.g., text, image, video, icon, or symbol) are transmitted to the user through the display (D), the light output through the display (D) can pass through at least one film layer (F1, F2), at least one mirror coating layer (105), and a lens assembly (200). The order in which the light passes through the at least one film layer (F1, F2), at least one mirror coating layer (105), and the lens assembly (200) can be set in various ways depending on the embodiment. According to another embodiment, a first film layer (F1) may be disposed adjacent to at least one of the two sides (e.g., sides facing the first direction or the second direction) of a first lens (L1) (hereinafter, referred to as the 'first lens (L1)') from the user's eye of the lens assembly (200), and a mirror coating layer (105) may be disposed adjacent to a display-side side (e.g., a side facing the first direction) of one of the second lens (L2) (hereinafter, referred to as the 'second lens (L2)') or the third lens (L3) (hereinafter, referred to as the 'third lens (L3)') from the user's eye of the lens assembly (200). A second film layer (F2) may be disposed adjacent to one side (e.g., a side facing the second direction) of the display (D).

[0065] According to one embodiment, referring to FIG. 3, a first film layer (F1) may be disposed adjacent to the eye side of the user among the two sides of the first lens (L1). The first film layer (F1) may include a first polarizer (101), a reflective polarizer (RP) (102), a first quarter wave plate (QWP) (103), and / or a first anti-reflection (AR) film (104).

[0066] According to another embodiment, a reflective polarizer (RP) (102) is configured in a film form and is laminated with a quarter wave plate (QWP) (103) to form a first film layer (F1), which can be attached to a first lens (L1). Here, 'lamination' may mean that at least one of two different members is provided with an adhesive and bonded. The first film layer (F1) in which the quarter wave plate (103) and the reflective polarizer (102) are laminated may be thinner and have superior optical performance than an embodiment in which they are simply laminated without being laminated. According to another embodiment, referring to FIG. 3, the first film layer (F1) may be arranged closer to the user's eye side based on the lens assembly (200) to selectively transmit, reflect, and / or block light entering the user's eye.

[0067] The first anti-reflection (AR) film (104) can be defined as a film that prevents reflection or reflection of light. The first anti-reflection (AR) film (104) may be a film constituting the first film layer (F1).

[0068] In one embodiment, the mirror coating layer (105) may be disposed on one surface facing the display (D) of at least one of the second lens (L2) or the third lens (F3) (e.g., the surface facing the first direction). The mirror coating layer (105) may be configured to transmit some light and reflect some light. For example, the mirror coating layer (105) may be configured to transmit 50% of light and reflect 50% of light. FIG. 3 may illustrate an example in which 50% of light is transmitted through the mirror coating layer (105). In another embodiment, the mirror coating layer (105) may be configured as a semi-transparent mirror, for example, in the form of a mirror coated on one surface of the second lens (L2) or the third lens (L3).

[0069] In the following description, the direction in which the user's eye views the display (D) may be referred to as a first direction, and the direction in which the display (D) faces the user's eye, opposite to the first direction, may be referred to as a second direction. Both the first direction and the second direction may be parallel to the optical axis (OI). The lens assembly (200) may include a plurality of lenses (e.g., a first lens (L1), a second lens (L2), and a third lens (L3)) sequentially arranged along the first direction.

[0070] The wearable electronic device (100) may include a second film layer (F2) disposed at a position farther from the user's eye (eye) with respect to the lens assembly (200), i.e., closer to the display (D), to selectively transmit, reflect, and / or block light entering the lens assembly (200). In one embodiment, the second film layer (F2) may be disposed on the display (D) of the wearable electronic device (100). Here, the second film layer (F2) may include a second quarter wave plate (QWP) (106), a second polarizer (Pol) (107), and / or a second anti-reflection (AR) film (108). For example, the second film layer (F2) may not include a reflective polarizer (e.g., a reflective polarizer (RP) (102)). The second film layer (F2) may also be arranged in a laminated form with a second polarizer (Pol) (107), a second quarter wave plate (QWP) (106), and a second anti-reflection (AR) film (108).

[0071] Referring to FIG. 3, the wearable electronic device (100) can operate as follows. Light output from the display (D) can reach the user's eye after passing through the second film layer (F2), the lens assembly (200), and the first film layer (F1). At this time, the second polarizer (107) of the second film layer (F2) can transmit the first linear polarization, for example, vertical polarization (or p polarization), and not transmit the second linear polarization, for example, horizontal polarization (or s polarization). For example, among the light reaching the second polarizer (107), only vertical polarization (or p polarization) can be transmitted. Light transmitted through the second polarizer (107) is converted into circular polarization (right-hand circular polarization or left-hand circular polarization) by, for example, the second 1 / 4 wave plate (106), and this circular polarization can reach the first film layer (F1) after passing through the lens assembly (200) and the mirror coating layer (105). The circular polarization that reaches the first 1 / 4 wave plate (103) can be converted back into linear polarization (e.g., vertical polarization (or p-polarization)) while passing through the first 1 / 4 wave plate (103) and can reach the reflective polarizer (102). The light can move in the second direction until it reaches the reflective polarizer (102). Light reaching the reflective polarizer (102) may be, for example, reflected from the reflective polarizer (102) and directed in a first direction, and may be converted into circular polarization (right-hand circular polarization or left-hand circular polarization) while passing through the first 1 / 4 wave plate (103). This circular polarization (right-hand circular polarization or left-hand circular polarization) may be reflected by the mirror coating layer (105) and directed in a second direction again, and at this time, the phase may be converted (for example, converted into right-hand circular polarization when left-hand circular polarization is present, or converted into left-hand circular polarization when right-hand circular polarization is present). The circular polarization whose phase has been converted may pass through the first 1 / 4 wave plate (103) and the reflective polarizer (102) along the second direction and reach the user's eye.At this time, the light passing through the first 1 / 4 wavelength plate (103) is converted into horizontal polarization (or s polarization) and can reach the user's eye. It should be noted that the embodiment of FIG. 3 is an example of a change in the state of light passing through a wearable electronic device (100) according to one embodiment, and the scope of the present disclosure is not necessarily limited to such embodiments.

[0072] FIG. 4 is a drawing showing a lens assembly (200) when the diopter is 0 according to one embodiment of the present disclosure.

[0073] FIG. 5 is a drawing showing a lens assembly (200) when the diopter is -6 according to one embodiment of the present disclosure.

[0074] Referring to FIGS. 4 and 5, a lens assembly (200) according to an embodiment of the present disclosure may include a plurality of lenses (e.g., L1, L2, L3). At least one of the plurality of lenses (L1, L2, L3) included in the lens assembly (200) may include a lens formed of a synthetic resin (e.g., plastic) material. At least one of the plurality of lenses (L1, L2, L3) included in the lens assembly (200) may be implemented as a lens formed of a synthetic resin (e.g., plastic) having a predetermined refraction. In one embodiment, by manufacturing the plurality of lenses from a synthetic resin material, the degree of design freedom in size or shape may be high. According to another embodiment, all of the lenses (L1, L2, L3) included in the lens assembly may be formed from a synthetic resin material. In this way, since the lens assembly (200) is formed of a synthetic resin material, it may be advantageous for reducing the weight and miniaturization of the wearable electronic device (100) on which the lens assembly (200) is mounted.

[0075] The lens assembly (200) may be arranged on an optical axis (OI) passing through the centers of a plurality of lenses from the object side (O, object side) on the screen of the display (D) to the user's eye side (I, image side). In describing the configuration of each lens below, for example, the user's eye side may indicate the direction in which the user's eye is located. Since an image is formed on the user's eye and the user recognizes an object, the user's eye can be viewed as acting as an image sensor. The "side facing the user's eye side (I)" of the lens means, for example, the side on the side where the user's eye (e.g., image sensor) is located with respect to the optical axis (OI), and refers to the right surface (or front) of the lens in the drawings of the present disclosure, and the "side facing the display (D) side (O)" may indicate the left surface (or back) of the lens in the drawings with respect to the optical axis (OI).

[0076] In describing a plurality of lenses (e.g., L1, L2, L3) according to another embodiment, a side of each lens that is closer to the optical axis (OI) may be referred to as a 'chief portion', and a side farther from the optical axis (OI) (or near the edge of the lens) may be referred to as a 'marginal portion'. The chief portion may be, for example, a portion of a lens (e.g., a first lens (L1)) that intersects the optical axis (OI). The marginal portion may be, for example, a portion of a lens (e.g., a first lens (L1)) that is spaced apart from the optical axis by a predetermined distance. The marginal portion may include, for example, an end portion of the lens that is farthest from the optical axis (OI) of the lens. According to one embodiment of the present disclosure, light passing through the center or a portion close to the center may be referred to as a principal ray or chief ray, and light passing through the peripheral portion may be referred to as a marginal ray.

[0077] Unless otherwise specified, the radius of curvature, thickness, total track length (TTL), or focal length of the lens of the present disclosure may all be in units of mm. In addition, the thickness of the lens, the spacing between lenses, and the TTL may be distances measured based on the optical axis of the lens. In addition, in the description of the shape of the lens, the meaning of a convex shape on one side may mean that the optical axis portion of the corresponding side is convex, and the meaning of a concave shape on one side may mean that the optical axis portion of the corresponding side is concave. Even if one side of the lens (the optical axis portion of the corresponding side) is described as having a convex shape, the edge portion of the lens (the portion spaced apart from the optical axis portion of the corresponding side by a predetermined distance) may be concave. Similarly, even if one side of the lens (the optical axis portion of the corresponding side) is described as having a concave shape, the edge portion of the lens (the portion spaced apart from the optical axis portion of the corresponding side by a predetermined distance) may be convex. An inflection point may refer to a point where the radius of curvature changes between a negative (-) value and a positive (+) value at a portion that does not intersect the optical axis.

[0078] According to one embodiment, the lens assembly (200) may include a first lens (L1), a second lens (L2), and a third lens (L3). The first lens (L1), the second lens (L2), and the third lens (L3) may be sequentially arranged from a side closer to the eye toward the display (D) when the user wears the wearable electronic device (100).

[0079] In another embodiment, the first lens (L1) included in the lens assembly (200) may have positive refractive power. When light parallel to the optical axis is incident on a lens having positive refractive power, the light passing through the lens may be condensed. For example, the lens having positive refractive power may be a lens based on the principle of a convex lens. On the other hand, when light parallel to the optical axis is incident on a lens having negative refractive power, the light passing through the lens may be dispersed. In another embodiment, the lens having negative refractive power may be a lens based on the principle of a concave lens. According to one embodiment, in the case of a lens assembly (200) including three lenses, the first lens (L1), the second lens (L2), and the third lens (L3) may all have positive refractive power.

[0080] A first lens (L1) included in a lens assembly (200) may include a first-first surface (S1) facing the eye side (I) of the user and a first-second surface (S2) facing the object side (O) on the display (D) screen. A second lens (L2) included in a lens assembly (200) may include a second-first surface (S3) facing the eye side (I) of the user and a second-second surface (S4) facing the object side (O) on the display (D) screen. A third lens (L3) included in a lens assembly (200) may include a third-first surface (S5) facing the eye side (I) of the user and a third-second surface (S6) facing the object side (O) on the display (D) screen.

[0081] According to another embodiment, the lens assembly (200) may further include a filter (not shown) between the last lens (e.g., the third lens (L3)) from the user's eye side and the display (D), although not separately illustrated in the drawing. In another embodiment, the filter may transmit visible light and block infrared rays. For example, the filter may include at least one of a low-pass filter and a cover glass. For example, by mounting the filter, the color sensation felt by the user when viewing an object displayed on the display may be made similar to the color sensation felt when viewing an actual object. According to one embodiment, the filter between the third lens (L3) and the display (D) may be implemented as a component constituting the second film layer (F2) described in the embodiment of FIG. 3 above.

[0082] In one embodiment, the first lens (L1) included in the lens assembly (200) may have at least one plane surface. For example, the first-first surface (S1) or the first-second surface (S2) may be planes. According to one embodiment, a first film layer (F1) may be attached to one plane surface of the first lens (L1). For example, referring to FIGS. 4 and 5 , the first-second surface (S2) may be plane, and the first film layer (F1) may be attached to it. According to another embodiment, the first film layer (F1) may be attached to one plane surface of the second lens (L2). For example, referring to FIGS. 4 and 5 , the second-first surface (S3) may be plane, and the first film layer (F1) may be attached to it. According to another embodiment, the first film layer (F1) may be disposed between the first lens (L1) and the second lens (L2). The first film layer (F1) may include a first polarizer (101) (Pol; polarizer), a reflective polarizer (RP; reflective polarizer) (102), a first quarter wave plate (QWP; quarter wave plate) (103), and a first anti-reflection (AR; anti-reflection) film (104), as illustrated in FIG. 3. For example, referring to FIGS. 4 and 5, the first-first surface (S1) may be configured as a convex surface that is convex toward the user's eye side (I). For example, the first lens (L1) may be a plano-concave type lens having a defined refractive power. Although not shown, the first-first surface (S1) of the first lens (L1) facing the user's eye side (I) may be configured as a flat surface, and a first film layer (F1) may be attached on the first-first surface (S1). However, the lens shape and configuration of the first lens (L1) are not limited to the above embodiment and may be designed in various ways.According to one embodiment, the first lens (L1) included in the lens assembly (200) may have at least one plane surface, and the other plane surface may be configured as an aspherical surface. For example, if the first-second plane (S2) is a plane, the first-first plane (S1) may be an aspherical surface. For example, if the first-first plane (S1) is a plane, the first-second plane (S2) may be an aspherical surface.

[0083] The first lens (L1) included in the lens assembly (200) can be fixed in position. By fixing the position of the first lens (L1) closest to the user's eye, eye fatigue of the user can be reduced.

[0084] According to one embodiment, one of the 2-2 surface (S4) of the second lens (L2) or the 3-2 surface (S6) of the third lens (L3) may include a convex surface (curved surface) formed convexly in a direction toward an object on the display screen. Referring to FIGS. 4 and 5, the second lens (L2) may have a convex 2-2 surface (S4) of the curved surface facing the object on the display (D) screen. A mirror coating layer (105) may be disposed on the convex 2-2 surface (S4) of the second lens (L2). The mirror coating layer (105) may allow light that passes through the first lens (L1) and is incident on the second lens (L2) to be reflected again and emitted toward the first lens (L1). For example, the second lens (L2) is a lens having a defined refractive power, and can reflect or transmit light by applying a mirror coating layer (105) having a light splitting function to the second-second surface (S4) facing the display (D). In this way, the wearable electronic device (100) of the present disclosure can extend the optical path length of incident light while reducing the size of the entire optical system by attaching the first film layer (F1) to at least one surface of the first lens (L1) and applying the mirror coating layer (105) to the second lens (L2). The second-first surface (S3) and / or the second-second surface (S4) of the second lens (L2) included in the lens assembly (200) can be configured as an aspherical surface.

[0085] According to one embodiment, the third-first surface (S5) and / or the third-second surface (S6) of the third lens (L3) included in the lens assembly (200) may be at least partially convex and at least partially concave for light correction. In one embodiment, the center of the third-first surface (S5) and / or the third-second surface (S6) may include a convex curve toward the display (D), and the periphery may include a concave curve, which may be advantageous for directly correcting light according to the plurality of lenses. According to one embodiment, the third-first surface (S5) and / or the third-second surface (S6) of the third lens (L3) included in the lens assembly (200) may be configured as an aspherical surface.

[0086] The wearable electronic device (100) of the present disclosure can perform a vision correction function according to diopter adjustment by configuring the second lens (L2) and the third lens (L3) to be movable relative to the first lens (L1) while the first lens (L1) is fixed within the wearable electronic device (100). The wearable electronic device (100) of the present disclosure can apply the vision correction function without deterioration in performance by moving the second lens (L2) and the third lens (L3).

[0087] A wearable electronic device (100) including the above-described lens assembly (200) can configure an optical system that satisfies the following [Conditional Expression 1].

[0088] [Condition 1]

[0089] 0.65 ≤ TTL / ImgH ≤ 1.0

[0090] Here, TTL (total track length) is the distance from the eye-side surface (e.g., the first-first surface (S1)) of the first lens (e.g., the first lens (L1)) on the user's eye side to the image plane of the display (D), and ImgH may be the maximum image height of the display (D). The optical system of the present disclosure may assume that the screen output from the display is recognized by the cornea of ​​the user's eye. Therefore, the 'maximum image height' is related to the size of the display (D) on which an object can be displayed, and may mean half of the diagonal length of the display (D). The above [conditional expression 1] is an expression for the ratio of the total length (TTL) of the entire optical system and the maximum image height used in the display (D). If the value is greater than the upper limit of the above [conditional expression 1], it may become difficult to minimize the size of the optical system.

[0091] A wearable electronic device (100) including the above-described lens assembly (200) can configure an optical system that satisfies the following [Conditional Expression 2].

[0092] [Condition 2]

[0093] 1.55 > T diopter / TTL

[0094] Here, TTL is the distance from the eye-side surface (e.g., the first-first surface (S1)) of the first lens (e.g., the first lens (L1)) of the user's eye side to the image plane of the display (D), and 'T diopter' may represent the distance from the eye-side surface (e.g., the second-first surface (S3)) of the vision correction lens (e.g., the second lens (L2)) to the image plane of the display (D). The optical system of the present disclosure may assume that the screen output from the display (D) is recognized by the cornea of ​​the user's eye. The above [Conditional Expression 2] is an expression for the ratio of the total length (TTL) of the entire optical system and the distance from the vision correction lens (e.g., the second lens (L2)) to the image plane of the display, and when the value is greater than the upper limit of [Conditional Expression 2], the movement distance of the vision correction lens (e.g., the second lens (L2), the third lens (L3)) for vision correction increases, so that the size of the entire optical system may increase.

[0095] The wearable electronic device (100) of the present disclosure can satisfy the following [Conditional Expression 3] on the lens surface to which the mirror coating layer (105) is applied.

[0096] [Condition 3]

[0097] L Radius < -50

[0098] Here, L Radius may be the refractive power of the lens surface to which the mirror coating layer (105) is applied.

[0099] The wearable electronic device (100) of the present disclosure may be configured such that all lenses included in the lens assembly are plastic aspherical lenses. In one embodiment, all three lenses are configured as plastic aspherical lenses, which may be advantageous in ensuring performance while maintaining a compact size and reducing manufacturing costs compared to glass lenses.

[0100] The wearable electronic device (100) of the present disclosure may be an optical system in which the lens configuration of the entire optical system is composed of positive, negative, and positive powers from the eye.

[0101] [Table 1] below describes various lens data of the lens assembly (200) illustrated in FIGS. 4 and 5, and may represent information on lenses positioned on a light path in a lens assembly (200) including, for example, three lenses. 'Eye' may refer to the user's eye. Radius may refer to the radius of curvature of the lens, thickness may refer to the thickness or air gap of the lens, nd may refer to the refractive index of a medium (e.g., lens), and vd may refer to the Abbe's number of the lens. With respect to the above thickness, the thickness written on the surface (e.g., the 1-1 surface (S1)) facing the user's eye side (I) of a lens (e.g., the first lens (L1)) may refer to the thickness of the lens, and the thickness value written on the surface (e.g., the 1-2 surface ((S2))) facing the display side (O) of a lens (e.g., the first lens (L1)) may be described as the air gap from the lens to the lens (e.g., the second lens (L2)) located behind it in the optical axis direction. In the embodiments of FIGS. 4 and 5, 'S1 to S6' may refer to the surfaces of the user's eye side (I) or the display side (O) of a plurality of related lenses (e.g., L1, L2, L3). For example, 'S1' may be a position considered in the design of the lens assembly (200), not an actual lens surface. In the following [Table 1], '1' written on the surface may indicate the position of the stop. In the present disclosure, [Table 1] The position of the aperture (stop) can correspond to the pupil in the user's cornea.

[0102] In the following [Table 1], '2 to 16' written on the surface may refer to the surfaces of a plurality of lenses (e.g., L1, L2, L3), a first film layer (F1), a mirror coating layer (105), and a second film layer (F2) located on the path of light when the light passes through the plurality of lenses (e.g., L1, L2, L3). Through the following [Table 1], it is possible to examine not only information on the plurality of lenses (e.g., L1, L2, L3), the first film (F1) layer, the mirror coating layer (105), and the second film layer (F2) themselves, but also information on the path of light passing through them.

[0103] For example, the '2' of the lens surface, surface may indicate the 1-1 side (S1) of the first lens (L1) on the user's eye side (I). Surface may indicate the 1-2 side (S2) of the display side (O) of the first lens (L1). Surface may indicate one side of the first film layer (F1). The thickness of surface '4' may indicate the distance between the second lens (L2) and the first lens (L1) when the diopter is 0 and when the diopter is -6, as provided through [Table 2] described below [Table 1]. Surface may indicate the 2-1 side (S3) of the second lens (L2) on the user's eye side. Surface may indicate the 2-2 side (S4) of the display side (O) of the second lens (L2) and at the same time indicate the mirror coating layer (105). Light passing through the lens assembly (200) of the present disclosure may be reflected and travel from, for example, the first film layer (F1) including the reflective polarizer (102) and / or the mirror coating layer (105). For example, the light may be reflected from the display-side (O) 2-2 surface (S4) of the second lens (L2) to which the mirror coating layer (105) is applied, and then pass through the 2-1 surface (S3) of the second lens (L2) facing the user's eye side (I) to reach the display-side (O) 1-2 surface (S2) of the first lens (L1). And, the light reflected again from the display side (O) 1-2 surface (S2) of the first lens (L1) to which the first film layer (F1) is attached can pass through the 2-1 surface (S3) of the second lens (L2) facing the user's eye side (I) and the display side (O) 2-2 surface (S4) of the second lens (L2). Information on the refraction and / or reflection of this light path can be provided through data defined as 6, 7, 8, 9, and 10 in the surface of [Table 1] below.As mentioned above, the '6' of the surface indicates the second-second surface (S4) of the display side (O) of the second lens (L2), which may include information about when light is reflected from the mirror coating layer (105), for example. In [Table 1], a negative (-) value of the thickness may mean that light directed in one direction (e.g., the first direction or the second direction) is reflected from this part (e.g., the 2-2 surface (S4) of the display side (O) of the second lens (L2)) and moves in the opposite direction. The '7' of the surface indicates the 2-1 surface (S3) of the second lens (L2) on the user's eye side (I), which may include information about the light reflected from the 2-2 surface (S4) of the display side (O) of the second lens (L2) and reaching the 2-1 surface (S3) of the user's eye side (I). The light that passes through the 2-1 surface (S3) of the second lens (L2) on the user's eye side (I) and reaches the 1-2 surface (S2) of the display side (O) of the first lens (L1) may be reflected from the reflective polarizer and then move toward the second lens (L2) again. [Table 1], surface '8' may indicate a reflective polarizer, surface '9' may indicate a 2-1 side (S3) of the second lens (L2) on the user's eye side (I). Surface '10' may indicate a 2-2 side (S4) of the second lens (L2) on the display side (O). Surface '11' may indicate a 3-1 side (S5) of the third lens (L3) on the user's eye side (I). Surface '12' may indicate a 3-2 side (S6) of the third lens (L3) on the display side (O). The thickness of surface '12' may indicate a distance between the third lens (L3) and the display (D) when diopter is 0 and when diopter is -6, as provided through [Table 2] described below [Table 1]. Surface '13' may indicate a surface of the second film layer (F2) on the user's eye side (I). there is.The '14' of the surface may indicate one side of the display side (O) of the second film layer (F2). Here, the second film layer (F2) may be composed of a second quarter wave plate (QWP) (106), a second polarizer (107) (Pol; polarizer), and a second anti-reflection (AR; anti-reflection) film (108) layer, as described above. The 'img' of the surface may indicate an image of an object output from the surface of the display (D). Meanwhile, in [Table 1] below, the surface in which '*' is indicated together with '2 to 14' described in the surface may mean that the surface of the corresponding lens is formed as an aspherical surface.

[0104] The lens assembly (200) included in [Table 1] below can satisfy the above-described conditions (and / or at least one of the above-described conditional expressions) when the total effective focal length (EFL) is 12.6 mm, the F number (Fno) is approximately 3.15, and the optical total length from image plane (OTTL) is approximately 14.91 mm to approximately 15.95 mm.

[0105] Lens surface (Surface) Radius of curvature (Radius) Thickness or air gap (Thickness) Effective focal length (EFL) Refractive index (nd) Abbe number (Vd) 1 (stop) Infinity 122 * 64.78 1033.33 239 1119.148 51.54 3756.05 3 Infinity 0.34 Infinity D 15 * 254.66 98 5.42 177 69 0.62 6 21.54 377 56.316 * -60.64 56 - 5.42 178 19.8169 - 1.54 377 56.317*254.6698-2.508828infinity2.5088189*254.66985.42177690.62621.5437756.3110*-60.64560.614 04911*-41.41582.200429112.00611.6284724.8712*-26.6093D213infinity0.2514infinity0.5imginfinity0

[0106] 0D-6DD12.5088182140.617549365D21.0037549222.896588511

[0107] Referring to the above [Table 1] and [Table 2], looking again at the embodiments of FIGS. 4 and 5, it can be confirmed that at 0 diopter, the distance (D1) between the first lens (L1) and the second lens (L2) is formed as approximately 2.5 mm, and at -6 diopter, the distance (D1) between the first lens (L1) and the second lens (L2) is formed as approximately 0.61 mm. At 0 diopter, the distance (D2) between the third lens (L3) and the display (D) is formed as approximately 1.00 mm, and at -6 diopter, the distance (D2) between the third lens (L3) and the display (D) is formed as approximately 2.89 mm. [Table 3] below describes aspherical coefficients of the plurality of lenses (e.g., L1, L2, L3), and the aspherical coefficients can be calculated through the following [Conditional Expression 4].

[0108] [Condition 4]

[0109]

[0110] Here, 'x' may represent the distance (sag) from the vertex of the lens in the direction of the optical axis (OI), 'c' may represent the reciprocal of the radius of curvature at the vertex of the lens, 'y' may represent the distance in the direction perpendicular to the optical axis, 'K' may represent the Conic constant, and 'A', 'B', 'C', 'D', 'E', 'F', 'G' may represent the aspherical coefficients, respectively. In the numerical values ​​in [Table 3] below, 'E and the numbers following it' may represent powers of 10. For example, E+01 is 10 1 , E-02 is 10 -2 In the following [Table 3], '2' of the surface may represent the 1-1 surface (S1) of the first lens (L1) on the user's eye side. '5, 7, 9' of the surface may represent the 2-1 surface (S3) of the second lens (L2) on the user's eye side as an aspheric surface on the same surface of substantially the same lens. In addition, '6, 10' of the surface may also represent the 2-2 surface (S4) of the display side of the second lens (L2) as an aspheric surface on the same surface of substantially the same lens. For example, '11' of the surface may represent the 3-1 surface (S5) of the third lens (L3) on the user's eye side. '12' of the surface may represent the 3-2 surface (S6) of the third lens (L3) on the display side. Referring to the above [Table 3], in a lens assembly (200) according to one embodiment, the user's eye-side 1-1 surface (S1) of the first lens (L1), the user's eye-side 2-1 surface (S3) and the display-side 2-2 surface (S4) of the second lens (L2), and the user's eye-side 3-1 surface (S5) and the display-side 3-2 surface (S6) of the third lens (L3) can be formed as an aspherical surface.

[0111] 2567K-0.2987246.75631-1.9984746.75631A1.24E-073.80E-051.08E-053.80E-05B1.16E-07-4.66E-0 7-9.30E-08-4.66E-07C-1.45E-092.83E-094.60E-102.83E-09D9.32E-12-1.12E-11-1.60E-12-1.12E- 11E-3.51E-142.93E-143.89E-152.93E-14F7.31E-17-4.57E-17-5.96E-18-4.57E-17G-6.67E-203.20E -204.05E-213.20E-20H0.00E+000.00E+000.00E+000.00E+00J0.00E+000.00E+000.00E+000.00E+0091 01112K46.75631-1.99847-11.3357-44.9482A3.80E-051.08E-052.37E-05-1.96E-05B-4.66E-07-9.30 E-08-1.37E-06-1.43E-06C2.83E-094.60E-104.29E-085.82E-08D-1.12E-11-1.60E-12-4.74E-10-7.0 1E-10E2.93E-143.89E-152.69E-124.37E-12F-4.57E-17-5.96E-18-7.92E-15-1.42E-14G3.20E-204.0 5E-219.52E-181.90E-17H0.00E+000.00E+000.00E+000.00E+00J0.00E+000.00E+000.00E+000.00E+00

[0112] FIG. 6A is a graph showing spherical aberration of a lens assembly according to one embodiment of the present disclosure.

[0113] FIG. 6b is a graph showing astigmatism of a lens assembly according to one embodiment of the present disclosure.

[0114] FIG. 6c is a graph showing distortion aberration of a lens assembly according to one embodiment of the present disclosure.

[0115] FIGS. 6A to 6C can represent aberrations of a lens assembly when the diopter is 0 (e.g., the embodiment of FIG. 4).

[0116] FIG. 7A is a graph showing spherical aberration of a lens assembly according to one embodiment of the present disclosure.

[0117] FIG. 7b is a graph showing astigmatism of a lens assembly according to one embodiment of the present disclosure.

[0118] FIG. 7c is a graph showing distortion aberration of a lens assembly according to one embodiment of the present disclosure.

[0119] FIGS. 7A to 7C can show the aberrations of the lens assembly when the diopter is -6 (e.g., the embodiment of FIG. 5).

[0120] FIGS. 6A and 7A are graphs showing spherical aberration of a lens assembly (200) according to various embodiments of the present disclosure.

[0121] Spherical aberration can be a phenomenon in which light passing through different parts of a lens (e.g., the chief portion and the marginal portion) comes to focus at different locations.

[0122] Referring to FIGS. 6A and 7A, the horizontal axis represents the degree of longitudinal spherical aberration, and the vertical axis represents the distance from the center of the optical axis as normalized, so that changes in longitudinal spherical aberration according to the wavelength of light can be illustrated. The longitudinal spherical aberration can be represented, for example, for light having a wavelength of approximately 656.2725 nm (nanometer), approximately 587.5618 nm, or approximately 481.1327 nm, respectively. Looking at FIGS. 6A and 7A, it can be confirmed that the longitudinal spherical aberration of the lens assembly according to various embodiments of the present disclosure in the visible light band is limited to approximately +0.050 to -0.050 except for light having a wavelength of 481.1327 nm, thereby exhibiting stable optical characteristics.

[0123] FIGS. 6B and 7B are graphs showing astigmatism of a lens assembly (200) according to various embodiments of the present disclosure.

[0124] Astigmatism may be a misalignment of the focal points of light passing through the vertical and horizontal directions when the tangential plane (or meridian plane) and the sagittal plane of a lens have different radii. The meridional plane may be a plane including a curve on the lens located in a direction substantially perpendicular to the optical axis from the vertex of the lens, and the sagittal plane may be a plane including a curve on the lens located in a second direction substantially perpendicular to the optical axis from the vertex of the lens. In FIGS. 6B and 7B, the vertical axis (IMG HT) may represent the image height. Here, the image height may mean the maximum distance from the optical axis (OI) to the edge of the display (D) (half the diagonal length of the display (D) display screen).

[0125] Referring to FIGS. 6B and 7B, the astigmatism of the lens assembly (200) is a result obtained at a wavelength of approximately 587.5618 nm, where the dotted line (Y) represents astigmatism (e.g., meridional plane curvature) in the direction of the tangential plane, and the solid line (X) may represent astigmatism (e.g., sagittal plane curvature) in the direction of the sagittal plane. As can be confirmed through FIGS. 6B and 7B, it can be confirmed that the astigmatism according to one embodiment of the present disclosure is limited to approximately +0.050 to -0.050, thereby exhibiting stable optical characteristics.

[0126] FIGS. 6C and 7C are graphs showing distortion of a lens assembly (200) according to various embodiments of the present disclosure.

[0127] Distortion aberration occurs because the optical magnification changes depending on the distance from the optical axis (OI), and the image formed on the actual imaging plane may appear larger or smaller than the image formed on the theoretical imaging plane.

[0128] In FIGS. 6C and 7C, the distortion of the lens assembly (200) is a result obtained at a wavelength of approximately 587.5618 nm, and an image captured through the lens assembly (200) may be distorted, for example, at a point (e.g., a periphery) that deviates from the optical axis (OI). However, such distortion is a level that may generally appear in an optical device using a lens, and the lens assembly (200) according to one embodiment of the present disclosure may provide good optical characteristics with a distortion rate of less than approximately ±25%.

[0129] The description of the lens assembly (200) according to the above-described embodiments may be applied to the lens assembly (300) according to another embodiment described below. Some of the plurality of lens assemblies (200, 300) may have the same lens properties (e.g., angle of view, focal length, autofocus, f number, or optical zoom), or at least one lens assembly may have one or more lens properties that are different from the lens properties of the other lens assemblies.

[0130] In describing one embodiment of the present disclosure below, components that can be easily understood through the aforementioned embodiments may be given similar reference numbers or omitted from the drawings. Furthermore, detailed descriptions thereof may be omitted to the extent that they would otherwise be redundant.

[0131] FIG. 8 is a drawing showing a lens assembly (300) when the diopter is 0 according to one embodiment of the present disclosure.

[0132] FIG. 9 is a drawing showing a lens assembly (300) when the diopter is -6 according to one embodiment of the present disclosure.

[0133] Referring to FIGS. 8 and 9, a lens assembly (300) according to various embodiments of the present disclosure may include a plurality of lenses (e.g., L1, L2, L3). Here, unlike the embodiments of FIGS. 4 and 5, the lens assembly (300) according to the embodiments illustrated in FIGS. 8 and 9 has a convex shape on the third-second surface (S6) of the third lens (L3) facing the object (O) on the display (D) screen, and a mirror coating layer (105) may be disposed on the third-second surface (S6).

[0134] In one embodiment, referring to FIGS. 8 and 9, the third lens (L3) may have a convex 3-2 surface (S6) facing an object on the display (D) screen. According to another embodiment, a mirror coating layer (105) may be disposed on the convex 3-2 surface (S6) of the third lens (L3). The mirror coating layer (105) may allow light that passes through the second lens (L2) and enters the third lens (L3) to be reflected again and emitted toward the first lens (L1). For example, the third lens (L3) may be a lens having a positive refractive power, and may apply a mirror coating layer (105) having a light splitting function to the 3-2 surface (S6) facing the display (D) to reflect or transmit light. In this way, the wearable electronic device (100) of the present disclosure can extend the optical path length of incident light while reducing the size of the entire optical system by attaching the first film layer (F1) to at least one surface of the first lens (L1) and applying the mirror coating layer (105) to the third lens (L3). Unlike the embodiments of FIGS. 4 and 5, the lens assembly (300) according to the embodiment illustrated in FIGS. 8 and 9 has a convex shape on the third-second surface (S6) of the third lens (L3) facing the object (O) on the display (D) screen, and since the mirror coating layer (105) is disposed on the third-second surface (S6), the light can be further extended and the size of the optical system can be further minimized.

[0135] [Table 4] and [Table 5] below may represent various lens data of the lens assembly (300) according to the embodiments of FIGS. 8 and 9, for example. [Table 6] below may describe data for defining aspherical coefficients of each of the plurality of lenses (L1, L2, L3).

[0136] In [Table 4] below, '2~18' written on the surface may refer to the surfaces of the lenses, the first film layer (F1), the mirror coating layer (105), and the second film layer (F2) located on the path of light when the light passes through multiple lenses (e.g., L1, L2, L3). Through [Table 4] below, it is possible to examine not only information on the lenses, the first film layer (F1), the mirror coating layer (105), and the second film layer (F2) themselves, but also information on the path of light passing through them.

[0137] For example, '2' of the surface may indicate the first-first surface (S1) of the first lens (L1) on the user's eye side (I). '3' of the surface may indicate the first-second surface (S2) of the first lens (L1) on the display side (O). '4' of the surface may indicate one surface of the first film layer (F1). The thickness of the surface '4' may indicate the distance between the second lens (L2) and the third lens (L3) when the diopter is 0 and when the diopter is -6, as provided through [Table 5] described below [Table 4]. '5' of the surface may indicate the second-first surface (S3) of the second lens (L2) on the user's eye side. '6' of the surface may indicate the second-second surface (S4) of the second lens (L2) on the display side (O). The '7' of the surface may indicate the 3-1 side (S5) of the third lens (L3) on the user's eye side. The '8' of the surface may indicate the 3-2 side (S6) of the display side (O) of the third lens (L3) and at the same time, the mirror coating layer (105). Light passing through the lens assembly (200) of the present disclosure may be reflected and travel in, for example, the first film layer (F1) including the reflective polarizer (102) and / or the mirror coating layer (105). For example, light may be reflected from the 3-2 surface (S6) of the display side (O) of the 3rd lens (L3) to which the mirror coating layer (105) is applied, and then pass through the 3-1 surface (S5) ('9' of the surface) of the 3rd lens (L2) toward the user's eye side (I), the 2-2 surface (S4) ('10' of the surface) of the 2nd lens (L2) toward the display side (O), and the 2-1 surface (S3) ('11' of the surface) of the 2nd lens (L2) toward the user's eye side (I), and then reach one surface ('12' of the surface) of the 1st film layer (F1).And, the light reflected again from the 1-2 surface (S2) of the display side (O) of the first lens (L1) to which the first film layer (F1) is attached can pass through the 2-1 surface (S3) (surface '13') of the second lens (L2) facing the user's eye side (I), the 2-2 surface (S4) (surface '14') of the display side (O) of the second lens (L2), the 3-1 surface (S5) (surface '15') of the third lens (L2) facing the user's eye side (I), and the 3-2 surface (S6) (surface '16') of the display side (O) of the third lens (L3). Information on the refraction and / or reflection of this light path can be provided through data defined as 9, 10, 11, 12, 13, 14, 15, and 16 in the surface of [Table 4] below. As mentioned above, the '8' of the surface indicates the 3-2 side (S6) of the display side (O) of the 3rd lens (L3), which may include information about when light is reflected from the mirror coating layer (105), for example. In [Table 4], a thickness having a negative (-) value may mean that light directed in one direction (e.g., the first direction or the second direction) is reflected at this part (e.g., the display side (O) 3-2 surface (S6) of the third lens (L3)) and moves in the opposite direction. The '9' of the surface indicates the user's eye side (I) 3-1 surface (S5) of the third lens (L3), which may include information about light reflected at the display side (O) 2-2 surface (S4) of the second lens (L2) and reaching the user's eye side (I) 2-1 surface (S3). Light that passes through the user's eye side (I) 2-1 surface (S3) of the second lens (L2) and reaches the display side (O) 1-2 surface (S2) of the first lens (L1) may be reflected from the reflective polarizer and then move toward the second lens (L2) again.In [Table 4], surface '12' may indicate, for example, a reflective polarizer, surface '13' may indicate a 2-1 side (S3) of the second lens (L2) on the user's eye side (I), and surface '14' may indicate a 2-2 side (S4) of the second lens (L2) on the display side (O). Surface '15' may indicate a 3-1 side (S5) of the third lens (L3) on the user's eye side (I). Surface '16' may indicate a 3-2 side (S6) of the third lens (L3) on the display side (O). The thickness of surface '16' may indicate the distance between the third lens (L3) and the display (D) when diopter is 0 and when diopter is -6, as provided through [Table 5] described below [Table 4]. The '17' of the surface may indicate one side of the second film layer (F2) on the user's eye side (I). The '18' of the surface may indicate one side of the second film layer (F2) on the display side (O). As described above, the second film layer (F2) may be composed of a second quarter wave plate (QWP) (106), a second polarizer (107) (Pol; polarizer), and a second anti-reflection (AR; anti-reflection) film (108) layer. The 'img' of the surface may indicate an image of an object output from the surface of the display (D). Meanwhile, in [Table 4] below, a surface in which '*' is indicated together with '2 to 18' described in the surface may mean that the surface of the corresponding lens is formed as an aspherical surface.

[0138] The lens assembly (200) included in [Table 4] below can satisfy the above-described conditions (and / or at least one of the above-described conditional expressions) when the total effective focal length (EFL) is 12.6 mm, the F number (Fno) is approximately 3.15, and the optical total length from image plane (OTTL) is approximately 14.91 mm to approximately 15.95 mm.

[0139] Lens surface (Surface) curvature radius (Radius) thickness or Air gap (Thickness)Effective focal length (EFL)Refractive index (nd)Abbe number (Vd)1 (stop)Infinity12250.500194.4039296492.88251.543756.053Infinity0.31.516864.174*InfinityD15*-702.9094.02686058121.0931.543756.056*-60.32110.300001537*-84.91532.10781152378.08531.543756.058*-60.6176-2.107811572.8666-1.543756.059-84 .9153-0.300001510*-60.3211-4.026860611*-702.909-2.326711525.6749-1. 543756.0512*infinity2.3267115113*-702.9094.0268605814*-60.32110.3000 0153121.0931.543756.0515*-84.91532.1078115216*-60.6176D2378.08531.543756.0517infinity0.2518infinity0.51.516864.17imginfinity01.516864.2

[0140] 0D-6DD12.3267115140.59894618D21.2501811272.975533326

[0141] Referring to the above [Table 4] and [Table 5], looking again at the embodiments of FIGS. 8 and 9, it can be confirmed that at 0 diopter, the distance (D1) between the first lens (L1) and the second lens (L2) is formed as approximately 2.32 mm, and at -6 diopter, the distance (D1) between the first lens (L1) and the second lens (L2) is formed as approximately 0.59 mm. At 0 diopter, the distance (D2) between the third lens (L3) and the display (D) is formed as approximately 1.25 mm, and at -6 diopter, the distance (D2) between the third lens (L3) and the display (D) is formed as approximately 2.97 mm.

[0142] In the following [Table 6], '4, 12' of the surface may represent the display-side 1-2 surface (S2) of the first lens (L1) as an aspheric surface for the same surface of substantially the same lens. '5, 11, 13' of the surface may represent the user-side 2-1 surface (S3) of the second lens (L2). '6, 10, 14' of the surface may represent the display-side 2-2 surface (S4) of the second lens (L2). '7, 9, 15' of the surface may represent the user-eye-side 3-1 surface (S5) of the third lens (L3). '8, 16' of the surface may represent the display-side 3-2 surface (S6) of the third lens (L3). Referring to the above [Table 6], in a lens assembly (200) according to one embodiment, the user's eye-side 1-1 surface (S1) of the first lens (L1), the user's eye-side 2-1 surface (S3) and the display-side 2-2 surface (S4) of the second lens (L2), and the user's eye-side 3-1 surface (S5) and the display-side 3-2 surface (S6) of the third lens (L3) can be formed as an aspherical surface.

[0143] 2567K1.08375-99.0012-13.88565-28.3465A-1.48E-06-1.63E-05-4.73E-305.18E-05B9.02E-095.72E-071.21E-42-1.11E-06C5.42E-11-7.47E-09-4.93E-561.15E-08D-9.90E-135.43E-119.13E-70-6.77E-11E5.88E-15-2.36E-13-9.23E-842.21E-13F-1.66E-176.04E-165.26E-98-3.74E-16G1.75E-20-8.33E-19-1.59E-1122.47E-19H0.00E+004.73E-221.98E-1271.60E-23J0.00E+000.00E+000.00E+000.00E+00891011K-1.05537-28.3465-13.88565-99.0012A1.29E-055.18E-05-4.73E-30-1.63E-05B-2.32E-07-1.11E-061.21E-425.72E-07C2.30E-091.15E-08-4.93E-56-7.47E-09D-1.28E-11-6.77E-119.13E-705.43E-11E3.87E-142.21E-13-9.23E-84-2.36E-13F-5.68E-17-3.74E-165.26E-986.04E-16G2.52E-202.47E-19-1.59E-112-8.33E-19H1.27E-231.60E-231.98E-1274.73E-22J0.00E+000.00E+000.00E+000.00E+0013141516K-99.0012-13.88565-28.3465-1.05537A-1.63E-05-4.73E-305.18E-051.29E-05B5.72E-071.21E-42-1.11E-06-2.32E-07C-7.47E-09-4.93E-561.15E-082.30E-09D5.43E-119.13E-70-6.77E-11-1.28E-11E-2.36E-13-9.23E-842.21E-133.87E-14F6.04E-165.26E-98-3.74E-16-5.68E-17G-8.33E-19-1.59E-1122.47E-192.52E-20H4.73E-221.98E-1271.60E-231.27E-23J0.00E+000.00E+000.00E+000.00E+00.

[0144] According to one embodiment, the lens assembly (200, 300) according to various embodiments of the present disclosure may have values ​​that satisfy each conditional expression as shown in [Table 7] below.

[0145] Example 4 and Example 5 Example 8 and Example 9 Conditional formula 10.70.67 Conditional formula 20.971.52 Conditional formula 3-60-60

[0146] FIG. 10A is a graph showing spherical aberration of a lens assembly according to one embodiment of the present disclosure.

[0147] FIG. 10b is a graph showing astigmatism of a lens assembly according to one embodiment of the present disclosure.

[0148] FIG. 10c is a graph showing distortion aberration of a lens assembly according to one embodiment of the present disclosure.

[0149] FIG. 11A is a graph showing spherical aberration of a lens assembly according to one embodiment of the present disclosure.

[0150] FIG. 11b is a graph showing astigmatism of a lens assembly according to one embodiment of the present disclosure.

[0151] FIG. 11c is a graph showing distortion aberration of a lens assembly according to one embodiment of the present disclosure.

[0152] FIGS. 10A and 11A are graphs showing spherical aberration of a lens assembly (300) according to various embodiments of the present disclosure.

[0153] Spherical aberration can be a phenomenon in which light passing through different parts of a lens (e.g., the chief portion and the marginal portion) comes to focus at different locations.

[0154] Referring to FIGS. 10A and 11A, the horizontal axis represents the degree of longitudinal spherical aberration, and the vertical axis represents the distance from the center of the optical axis as normalized, so that the change in longitudinal spherical aberration according to the wavelength of light can be illustrated. The longitudinal spherical aberration can be represented, for example, for light having a wavelength of approximately 656.2725 nm (nanometer), approximately 587.5618 nm, or approximately 481.1327 nm, respectively. Looking at FIGS. 10A and 11A, it can be confirmed that the longitudinal spherical aberration of the lens assembly according to various embodiments of the present disclosure in the visible light band is limited to approximately +0.050 to -0.050 except for light having a wavelength of 481.1327 nm, thereby exhibiting stable optical characteristics.

[0155] FIGS. 10b and 11b are graphs showing astigmatism of a lens assembly (300) according to various embodiments of the present disclosure.

[0156] Astigmatism can be a misalignment of the focal points of light passing through the vertical and horizontal directions when the tangential plane (or meridian plane) and the sagittal plane of a lens have different radii. The meridian plane can be a plane that includes a curve on the lens located in a direction substantially perpendicular to the optical axis from the vertex of the lens, and the sagittal plane can be a plane that includes a curve on the lens located in a second direction substantially perpendicular to the optical axis from the vertex of the lens.

[0157] Referring to FIGS. 10b and 11b, the vertical axis (IMG HT) may represent the image height. Here, the image height may mean the maximum distance from the optical axis (OI) to the edge of the display (D) (half of the diagonal length of the display (D) display screen).

[0158] In FIGS. 10b and 11b, the astigmatism of the lens assembly (300) is a result obtained at a wavelength of approximately 587.5618 nm, where the dotted line (Y) represents astigmatism in the direction of the tangential plane (e.g., meridional plane curvature), and the solid line (X) may represent astigmatism in the direction of the sagittal plane (e.g., sagittal plane curvature). As can be confirmed through FIG. 10b, it can be confirmed that the astigmatism according to one embodiment is limited to approximately +0.050 to -0.050, thereby exhibiting stable optical characteristics. As can be confirmed through FIG. 11b, even in a state of diopter -6, the astigmatism can be limited to approximately +0.200 to -0.200.

[0159] FIGS. 10c and 11c are graphs showing distortion of a lens assembly (300) according to various embodiments of the present disclosure.

[0160] Distortion aberration occurs because the optical magnification changes depending on the distance from the optical axis (OI), and the image formed on the actual imaging plane may appear larger or smaller than the image formed on the theoretical imaging plane.

[0161] In FIG. 10c and FIG. 11c, the distortion of the lens assembly (300) is a result obtained at a wavelength of approximately 587.5618 nm, and an image captured through the lens assembly (300) may be distorted at a point (e.g., a periphery) that deviates from the optical axis (OI). Such distortion is a level that may generally appear in an optical device using a lens, and the lens assembly (300) according to one embodiment of the present disclosure may provide good optical characteristics with a distortion rate of less than approximately ±25%.

[0162] FIG. 12 is a block diagram of an electronic device (1201) (e.g., the electronic device (100) of FIG. 1) (e.g., an optical device) within a network environment (1200) according to one embodiment of the present disclosure.

[0163] Referring to FIG. 12, in a network environment (1200), an electronic device (1201) (e.g., an optical device) may communicate with an electronic device (1202) via a first network (1298) (e.g., a short-range wireless communication network), or may communicate with at least one of an electronic device (1204) or a server (1208) via a second network (1299) (e.g., a long-range wireless communication network). In one embodiment, the electronic device (1201) may communicate with the electronic device (1204) via the server (1208). According to another embodiment, the electronic device (1201) may include a processor (1220), a memory (1230), an input module (1250), an audio output module (1255), a display module (1260), an audio module (1270), a sensor module (1276), an interface (1277), a connection terminal (1278), a haptic module (1279), a camera module (1280), a power management module (1288), a battery (1289), a communication module (1290), a subscriber identification module (1296), or an antenna module (1297). In some embodiments, the electronic device (1201) may omit at least one of these components (e.g., the display device (1260) or the camera module (1280)), or may have one or more other components added. In another embodiment, some of these components (e.g., sensor module (1276), camera module (1280), or antenna module (1297)) may be integrated into one component (e.g., display module (1260)).

[0164] The processor (1220) may, for example, execute software (e.g., a program (1240)) to control at least one other component (e.g., a hardware or software component) of the electronic device (1201) connected to the processor (1220) and perform various data processing or operations. According to one embodiment, as at least a part of the data processing or operations, the processor (1220) may store commands or data received from other components (e.g., a sensor module (1276) or a communication module (1290)) in a volatile memory (1232), process the commands or data stored in the volatile memory (1232), and store result data in a non-volatile memory (1234). In one embodiment, the processor (1220) may include a main processor (1221) (e.g., a central processing unit or an application processor), or a secondary processor (1223) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together with the main processor (1221). For example, when the electronic device (1201) includes the main processor (1221) and the secondary processor (1223), the secondary processor (1223) may be configured to use less power than the main processor (1221) or to be specialized for a given function. The secondary processor (1223) may be implemented separately from the main processor (1221) or as a part thereof.

[0165] The auxiliary processor (1223) may be configured to control at least a portion of functions or states associated with at least one component (e.g., the display module (1260), the sensor module (1276), or the communication module (1290)) of the electronic device (1201), for example, on behalf of the main processor (1221) while the main processor (1221) is in an inactive (e.g., sleep) state, or together with the main processor (1221) while the main processor (1221) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (1223) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (1280) or a communication module (1290)). In another embodiment, the auxiliary processor (1223) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the electronic device (1201) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (1208)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0166] The memory (1230) may be configured to store various data used by at least one component (e.g., the processor (1220) or the sensor module (1276)) of the electronic device (1201). The data may include, for example, software (e.g., the program (1240)) and input data or output data for commands related thereto. The memory (1230) may include a volatile memory (1232) or a non-volatile memory (1234).

[0167] The program (1240) may be stored as software in memory (1230) and may include, for example, an operating system (1242), middleware (1244), or an application (1246).

[0168] The input module (1250) can receive commands or data to be used in a component of the electronic device (1201) (e.g., a processor (1220)) from an external source (e.g., a user) of the electronic device (1201). The input module (1250) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0169] The audio output module (1255) can output audio signals to the outside of the electronic device (1201). The audio output module (1255) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In another embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0170] The display module (1260) can visually provide information to an external party (e.g., a user) of the electronic device (1201). The display module (1260) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. In another embodiment, the display module (1260) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0171] The audio module (1270) can convert sound into an electrical signal, or vice versa. In one embodiment, the audio module (1270) can acquire sound through the input module (1250), output sound through the audio output module (1255), or an external electronic device (e.g., electronic device (1202)) directly or wirelessly connected to the electronic device (1201) (e.g., a speaker or headphones).

[0172] The sensor module (1276) can detect the operating status (e.g., power or temperature) of the electronic device (1201) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to another embodiment, the sensor module (1276) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0173] The interface (1277) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (1201) with an external electronic device (e.g., the electronic device (1202)). In another embodiment, the interface (1277) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0174] The connection terminal (1278) may include a connector through which the electronic device (1201) may be physically connected to an external electronic device (e.g., the electronic device (1202)). In one embodiment, the connection terminal (1278) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0175] The haptic module (1279) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. In another embodiment, the haptic module (1279) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0176] The camera module (1280) can capture still images and videos. According to one embodiment, the camera module (1280) may include one or more lenses, image sensors, image signal processors, or flashes.

[0177] The power management module (1288) can manage the power supplied to the electronic device (1201). In one embodiment, the power management module (1288) can be implemented, for example, as at least a part of a power management integrated circuit (PMIC).

[0178] A battery (1289) may power at least one component of the electronic device (1201). In one embodiment, the battery (1289) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0179] The communication module (1290) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (1201) and an external electronic device (e.g., electronic device (1202), electronic device (1204), or server (1208)), and the performance of communication through the established communication channel. The communication module (1290) may operate independently from the processor (1220) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (1290) may include a wireless communication module (1292) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (1294) (e.g., a local area network (LAN) communication module, or a power line communication module). Any of these communication modules may communicate with an external electronic device (1204) via a first network (1298) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (1299) (e.g., a long-range communication network such as a legacy cellular network, a fifth-generation (5G) network, a next-generation communication network, the Internet, or a computer network (e.g., a local area network or a wide area network)). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (1292) may use subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (1296) to verify or authenticate the electronic device (1201) within a communication network such as the first network (1298) or the second network (1299).

[0180] The wireless communication module (1292) can support a 5G network and next-generation communication technologies following the 4th generation (4G) network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency communications (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (1292) can support, for example, a high-frequency band (e.g., millimeter wave (mmWave) band) to achieve a high data transmission rate. The wireless communication module (1292) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (1292) can support various requirements specified in the electronic device (1201), an external electronic device (e.g., the electronic device (1204)), or a network system (e.g., the second network (1299)). According to one embodiment, the wireless communication module (1292) may support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0181] The antenna module (1297) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module (1297) may include one antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In one embodiment, the antenna module (1297) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as the first network (1298) or the second network (1299), may be selected from the plurality of antennas by, for example, the communication module (1290). A signal or power may be transmitted or received between the communication module (1290) and the external electronic device via the selected at least one antenna. In another embodiment, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (1297).

[0182] According to various embodiments, the antenna module (1297) may form a mmWave antenna module. According to another embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high frequency band.

[0183] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0184] In one embodiment, commands or data may be transmitted or received between the electronic device (1201) and an external electronic device (1204) via a server (1208) connected to a second network (1299). Each of the external electronic devices (1202, 1204) may be the same or a different type of device as the electronic device (1201). According to another embodiment, all or part of the operations executed in the electronic device (1201) may be executed in one or more of the external electronic devices (1202, 1204, or 1208). For example, when the electronic device (1201) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (1201) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (1201). The electronic device (1201) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technologies may be utilized, for example.

[0185] The electronic device (1201) can provide ultra-low latency services, for example, by utilizing distributed computing or mobile edge computing. In another embodiment, the external electronic device (1204) may include an Internet of Things (IoT) device. The server (1208) may be an intelligent server utilizing machine learning and / or a neural network. According to another embodiment, the external electronic device (1204) or the server (1208) may be included in a second network (1299). The electronic device (1201) may be applied to intelligent services (e.g., smart homes, smart cities, smart cars, or healthcare) based on 5G communication technology and IoT-related technology.

[0186] FIG. 13 is a block diagram (1300) illustrating a camera module (1380) according to one embodiment of the present disclosure.

[0187] Referring to FIG. 13, the camera module (1380) may include a lens assembly (1310) (e.g., 200, 300), a flash (1320), an image sensor (1330) (e.g., IS), an image stabilizer (1340), a memory (1350) (e.g., a buffer memory) (e.g., the memory 1230 of FIG. 12), or an image signal processor (1360). The lens assembly (1310) may collect light emitted from a subject that is a target of image capturing. The lens assembly (1310) may include one or more lenses. In one embodiment, the camera module (1380) may include a plurality of lens assemblies (1310). In this case, the camera module (1380) may form, for example, a dual camera, a 360-degree camera, or a spherical camera. Some of the plurality of lens assemblies (1310) may have the same lens properties (e.g., angle of view, focal length, autofocus, F-number (Fno), or optical zoom), or at least one lens assembly may have one or more lens properties that differ from the lens properties of the other lens assemblies. A lens assembly (1310) may include, for example, a wide-angle lens or a telephoto lens.

[0188] The flash (1320) can emit light used to enhance light emitted or reflected from a subject. According to one embodiment, the flash (1320) can include one or more light-emitting diodes (e.g., red-green-blue (RGB) LED, white LED, infrared LED, or ultraviolet LED), or a xenon lamp. The image sensor (1330) can acquire an image corresponding to the subject by converting light emitted or reflected from the subject and transmitted through the lens assembly (1310) into an electrical signal. According to another embodiment, the image sensor (1330) can include one image sensor selected from among image sensors having different properties, such as an RGB sensor, a black and white (BW) sensor, an IR sensor, or a UV sensor, a plurality of image sensors having the same property, or a plurality of image sensors having different properties. Each image sensor included in the image sensor (1330) may be implemented using, for example, a CCD (charged coupled device) sensor or a CMOS (complementary metal oxide semiconductor) sensor.

[0189] The image stabilizer (1340) can move at least one lens or image sensor (1330) included in the lens assembly (1310) in a specific direction or control the operating characteristics of the image sensor (1330) (e.g., adjust the read-out timing) in response to the movement of the camera module (1380) or the electronic device (1201) including the same. This allows compensating for at least some of the negative effects of the movement on the captured image. The image stabilizer (1340) can detect such movement of the camera module (1380) or the electronic device (1201) by using a gyro sensor (not shown) or an acceleration sensor (not shown) disposed inside or outside the camera module (1380). According to another embodiment, the image stabilizer (1340) can be implemented as, for example, an optical image stabilizer. The memory (1350) can temporarily store at least a portion of an image acquired through the image sensor (1330) for the next image processing task. In one embodiment, when image acquisition is delayed due to a shutter, or when multiple images are acquired at high speed, the acquired original image (e.g., a Bayer-patterned image or a high-resolution image) is stored in the memory (1350), and a corresponding copy image (e.g., a low-resolution image) can be previewed through the display device (1260). Thereafter, when a specified condition is satisfied (e.g., a user input or a system command), at least a portion of the original image stored in the memory (1350) can be acquired and processed, for example, by the image signal processor (1360). The memory (1350) can be configured as at least a portion of the memory (1230) of FIG. 12, or as a separate memory that operates independently therefrom.

[0190] The image signal processor (1360) can perform one or more image processing operations on an image acquired through an image sensor (1330) or an image stored in a memory (1350). The one or more image processing operations may include, for example, depth map generation, 3D modeling, panorama generation, feature extraction, image synthesis, or image compensation (e.g., noise reduction, resolution adjustment, brightness adjustment, blurring, sharpening, or softening). Additionally or alternatively, the image signal processor (1360) may perform control (e.g., exposure time control, or read-out timing control) on at least one of the components included in the camera module (1380) (e.g., image sensor (1330)). An image processed by the image signal processor (1360) may be stored back in the memory (1350) for further processing or provided to an external component of the camera module (1380) (e.g., memory (1230), display device (1260), electronic device (1202), electronic device (1204), or server (1208)). In another embodiment, the image signal processor (1360) may be configured to perform image signal processing. The processor (1360) may be configured as at least a part of the processor (1220), or may be configured as a separate processor that operates independently of the processor (1220). If the image signal processor (1360) is configured as a separate processor from the processor (1220), at least one image processed by the image signal processor (1360) may be displayed through the display device (1260) as is or after undergoing additional image processing by the processor (1220).

[0191] In one embodiment, the electronic device (1201) may include a plurality of camera modules (1380), each having different properties or functions. In this case, for example, at least one of the plurality of camera modules (1380) may be a wide-angle camera, and at least another may be a telephoto camera. Similarly, at least one of the plurality of camera modules (1380) may be a front-facing camera, and at least another may be a rear-facing camera.

[0192] Electronic devices according to various embodiments of the present disclosure may take various forms. 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. Electronic devices according to embodiments of the present disclosure are not limited to the aforementioned devices.

[0193] The various embodiments of the present disclosure and the terminology used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In the present disclosure, each of the phrases "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" can include any one of the items listed together in the corresponding phrase among the phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0194] In various embodiments of the present disclosure, the term "module" may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0195] Various embodiments of the present disclosure may be implemented as software (e.g., a program (1240)) including one or more commands stored in a storage medium (e.g., an internal memory (1236) or an external memory (1238)) readable by a machine (e.g., an electronic device (1201)). For example, a processor (e.g., a processor (1220)) of the machine (e.g., an electronic device (1201)) may call at least one command among the one or more commands stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one command called. The one or more commands 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, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0196] According to one embodiment, the method according to various embodiments of the present disclosure may be provided as a computer program product. The computer program product may be traded between sellers and buyers as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or may be provided through an application store (e.g., Play Store). TM ) or directly between two user devices (e.g., smartphones), online distribution (e.g., downloading or uploading). In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0197] According to another embodiment, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to some embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0198] According to one embodiment of the present disclosure, a lens assembly may include a first lens having a positive refractive power and a fixed position, a first film layer attached to one surface of the first lens, a second lens having a positive refractive power and being movable in position relative to an optical axis, and a third lens having a positive refractive power and being movable in position relative to the optical axis together with the second lens. According to one embodiment, at least one of the second lens and the third lens may have a mirror coating layer disposed on one surface facing a display. The first lens, the second lens, and the third lens may be sequentially disposed along the optical axis from a side of a user's eye toward the display, and a ratio of a distance from a side of the user's eye of the first lens to an imaging surface of the display and a distance from a side of the user's eye of the second lens to an imaging surface of the display may satisfy the following [Conditional Expression 1].

[0199] [Condition 1]

[0200] 1.55 > T diopter / TTL (Here, 'TTL (total track length)' represents the distance from the user's eye side of the first lens to the image plane of the display, and 'T diopter ' represents the distance from the user's eye side of the second lens to the image plane of the display.

[0201] According to another embodiment, the distance from the user's eye side of the first lens to the image plane of the display and the ratio of the maximum height of the image plane can satisfy the following [Conditional Expression 2].

[0202] [Condition 2]

[0203] 0.65 ≤ TTL / ImgH ≤ 1.0

[0204] (Here, 'TTL (total track length)' represents the distance from the user's eye side of the first lens to the image plane of the display, and 'ImgH' represents the maximum height of the image plane).

[0205] According to one embodiment, a second film layer (F2) may be disposed adjacent to a surface of the display facing the user's eye side.

[0206] In one embodiment, the first film layer (F1) may include a first polarizer (101), a first quarter wave plate (103), a reflective polarizer (102), and a first anti-reflection (AR) film (104).

[0207] In another embodiment, the mirror coating layer may be a beam splitter.

[0208] According to another embodiment, the second film layer (F2) may include a second polarizer (107), a second quarter wave plate (106), and a second anti-reflection film (108).

[0209] According to one embodiment, the first lens includes a first-first surface (S1) facing the eye side of the user, and a first-second surface (S2) facing the object side (O) of the display screen and having the first film layer (F1) attached thereto, wherein the first-second surface (S2) may be flat.

[0210] According to another embodiment, one surface of the lens to which the mirror coating layer is attached can satisfy the following [Conditional Expression 3].

[0211] [Condition 3]

[0212] L Radius < -50

[0213] (Here, L Radius represents the refractive power of the lens surface to which the above mirror coating layer is applied).

[0214] According to one embodiment, the second lens includes a second-first surface (S3) facing the eye side of the user, and a second-second surface (S4) facing the object side (O) on the display screen and having the mirror coating layer (105) disposed thereon, wherein the second-second surface (S4) may be a convex curved surface facing the display direction.

[0215] In one embodiment, the third lens includes a 3-1 surface (S5) facing the eye side of the user, and a 3-2 surface (S6) facing the object side (O) on the display screen and having the mirror coating layer (105) disposed thereon, wherein the 3-2 surface (S6) may be a convex curved surface facing the display direction.

[0216] According to one embodiment, at least one of the lenses (L1, L2, L3) included in the lens assembly may be configured as a lens including an aspherical surface.

[0217] According to another embodiment, the lenses (L1, L2, L3) included in the lens assembly may be composed of plastic lenses.

[0218] According to one embodiment, the second lens (L2) and the third lens (L3) can be moved in the direction of the optical axis to enable diopter adjustment.

[0219] In another embodiment, the polarization direction of the first 1 / 4 wave plate (103) and the polarization direction of the second 1 / 4 wave plate (106) may be perpendicular.

[0220] A wearable electronic device according to one embodiment of the present disclosure may include a lens assembly in which at least three lenses are aligned along an optical axis from a user's eye side toward a display, wherein the lens assembly may include a first lens closest to the user's eye side, having a positive refractive power, and having a fixed position, wherein a first film layer is attached to one surface of the first lens; a second lens having a positive refractive power and being movable in position relative to the optical axis; and a third lens having a positive refractive power and being movable in position relative to the optical axis together with the second lens. According to one embodiment, at least one of the second lens and the third lens may have a mirror coating layer disposed on one surface facing the display.

[0221] According to another embodiment, the ratio of the distance from the user's eye side of the first lens to the image plane of the display and the distance from the user's eye side of the second lens to the image plane of the display may satisfy the following [Conditional Expression 1].

[0222] [Condition 1]

[0223] 1.55 > T diopter / TTL (Here, 'TTL (total track length)' represents the distance from the user's eye side of the first lens to the image plane of the display, and 'T diopter ' represents the distance from the user's eye side of the second lens to the image plane of the display.

[0224] According to another embodiment, the distance from the user's eye side of the first lens to the image plane of the display and the ratio of the maximum height of the image plane can satisfy the following [Conditional Expression 2].

[0225] [Condition 2]

[0226] 0.65 ≤ TTL / ImgH ≤ 1.0

[0227] (Here, 'TTL (total track length)' represents the distance from the user's eye side of the first lens to the image plane of the display, and 'ImgH' represents the maximum height of the image plane).

[0228] According to one embodiment, a second film layer (F2) may be disposed adjacent to a surface of the display facing the user's eye side.

[0229] The above wearable electronic device may apply AR (Augment Reality), VR (Virtual Reality), MR (Mixed Reality), or XR (eXtened Reality).

[0230] According to one embodiment, the wearable electronic device may be of the VST (visual see-through) type.

[0231] A head-mounted wearable device has been constructed using a single lens, but this may be difficult to implement a vision correction function, and in some cases, multiple lenses have been used, but this may be difficult to achieve slimness.

[0232] The technical problems to be achieved in the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present disclosure pertains from the description below.

[0233] In the case of wearable electronic devices (e.g., AR / VR glasses), since the focal length is fixed, it is difficult to correct refractive errors of the user's vision (e.g., eye refraction due to vision disorders such as presbyopia, myopia, and hyperopia) through the system (e.g., AR / VR system) itself, and there is a disadvantage in that the resolution of the output virtual image is limited. In contrast, the wearable electronic device (100) of the present disclosure can correct vision and increase image resolution by extending the optical path length of incident light to enable display of virtual images at various focal lengths.

[0234] The wearable electronic device (100) of the present disclosure provides a vision correction function to a user by, for example, allowing at least some of the lenses to be movable to adjust the diopter, while providing at least one film layer (F1, F2) and at least one mirror coating layer (105) to extend and / or adjust the optical path length of light, thereby adjusting the focal length or improving the quality of the output image, and reducing the size of the entire optical system.

[0235] The wearable electronic device (100) of the present disclosure can perform a vision correction function according to diopter adjustment by configuring the second lens (L2) and the third lens (L3) to be movable with respect to the first lens (L1) while the first lens (L1) is fixed within the wearable electronic device (100).

[0236] While the detailed description of one embodiment of the present disclosure has described various embodiments, it will be readily understood by those skilled in the art that various modifications are possible without departing from the technical spirit and scope of the present disclosure as defined by the appended claims and their equivalents.

Claims

1. In the lens assembly (200), A first lens (L1) having a defined refractive power and having a fixed position; A second lens (L2) having a defined refractive power and being movable with respect to the optical axis (OI); and A third lens (L3) having a defined refractive power and being movable with respect to the optical axis together with the second lens, A first film layer (F1) is placed between the first lens and the second lens, At least one of the second lens and the third lens has a mirror coating layer (105) disposed on one surface facing the display (D). The first lens, the second lens, and the third lens are sequentially arranged along the optical axis from the user's eye side to the display side, The ratio of the distance from the user's eye side surface of the first lens to the image plane of the display and the distance from the user's eye side surface of the second lens to the image plane of the display is 1.55 > T diopter / Lens assembly satisfying the TTL condition. (Here, 'TTL (total track length)' represents the distance from the user's eye side of the first lens to the image plane of the display, and 'T diopter ' represents the distance from the user's eye side of the second lens to the image plane of the display.

2. In paragraph 1, A lens assembly that satisfies the condition that the ratio of the distance from the user's eye side of the first lens to the image plane of the display and the maximum height of the image plane is 0.65 ≤ TTL / ImgH ≤ 1.

0. (Here, 'TTL (total track length)' represents the distance from the user's eye side of the first lens to the image plane of the display, and 'ImgH' represents the maximum height of the image plane.) 3. In either of paragraphs 1 and 2, A lens assembly having a second film layer (F2) positioned adjacent to a surface of the display facing the user's eye side.

4. In paragraph 3, The above first film layer (F1) is a lens assembly including a first polarizer (101), a reflective polarizer (102), a first quarter wave plate (103), and a first anti-reflection (AR) film (104).

5. In any one of paragraphs 1 to 4, The above mirror coating layer is a lens assembly which is a beam splitter.

6. In paragraph 4, The second film layer (F2) is a lens assembly including a second 1 / 4 wavelength plate (106), a second polarizer (107), and a second anti-reflection film (108).

7. In any one of paragraphs 1 to 6, The first lens includes a first-first surface (S1) facing the eye side of the user, and a first-second surface (S2) facing the object side (O) on the display screen, The above first film layer (F1) is attached to the above first-second surface (S2), The above first and second surfaces (S2) are planar lens assemblies.

8. In any one of paragraphs 1 to 7, One side of the lens to which the above mirror coating layer is attached is L Radius A lens assembly satisfying the condition of < -50. (Here, L Radius represents the refractive power of the lens surface to which the above mirror coating layer is applied) 9. In any one of paragraphs 1 to 8, The second lens includes a 2-1 surface (S3) facing the eye side of the user, and a 2-2 surface (S4) facing the object side (O) on the display screen, The above mirror coating layer (105) is placed on the 2nd-2 surface (S4), The above 2-2 surface (S4) is a lens assembly which is a convex curved surface toward the display direction.

10. In any one of paragraphs 1 to 8, The third lens includes a 3-1 surface (S5) facing the user's eye side, and a 3-2 surface (S6) facing the object side (O) on the display screen. The above mirror coating layer (105) is placed on the 3-2 surface (S6), The above 3-2 surface (S6) is a lens assembly which is a convex curved surface toward the display direction.

11. In any one of paragraphs 1 to 10, A lens assembly comprising at least one lens among the lenses (L1, L2, L3) included in the above lens assembly, which is a lens including an aspherical surface.

12. In any one of paragraphs 1 to 11, The lenses (L1, L2, L3) included in the above lens assembly are a lens assembly composed of plastic lenses.

13. In any one of paragraphs 1 to 12, A lens assembly in which the second lens (L2) and the third lens (L3) can move in the direction of the optical axis to enable diopter adjustment.

14. In paragraph 6, A lens assembly in which the polarization direction of the first 1 / 4 wave plate (103) and the polarization direction of the second 1 / 4 wave plate (106) are perpendicular.

15. In a wearable electronic device (100), A lens assembly (200, 300) according to any one of claims 1 to 14; A wearable electronic device configured to provide Augmented Reality (AR), Virtual Reality (VR), Mixed Reality (MR), or eXtened Reality (XR) capabilities.

Images