Camera module and electronic device comprising same

Abstract

According to one embodiment disclosed herein, a camera module may comprise: a lens assembly; and an image sensor arranged to receive light focused or guided by the lens assembly. According to one embodiment, the lens assembly comprises at least three lenses arranged along the optical axis direction from an object side to an image side. A first lens disposed closest to the object side among the at least three lenses has a positive refractive power, and the object-side surface of the first lens may be concave. Various other embodiments are possible.

Description

Camera module and electronic device including the same

[0001] Various embodiments of the present disclosure relate to a camera module that can be mounted on a small electronic device such as a wearable device, and an electronic device including the same.

[0002] With the advancement of electronics, information, and communication technologies, a variety of functions are being integrated into a single electronic device. For example, electronic devices (e.g., smartphones) incorporate functions such as audio playback, imaging, and electronic notebooks in addition to communication functions. Furthermore, smartphones can be equipped with even more diverse functions through the installation of additional applications. In addition to executing pre-installed applications or stored functions, electronic devices can also access servers or other electronic devices via wired or wireless means to receive a variety of information in real time.

[0003] As the use of electronic devices becomes more commonplace, user demands for portability and usability may increase. In response to this demand, electronic devices that can be worn on the body (hereinafter referred to as "wearable electronic devices"), similar to wristwatches or glasses, have become commercially available. Examples of wearable electronic devices include head-mounted wearable devices (HMDs), smart glasses, smart watches (or bands), contact lens-type devices, ring-type devices, and clothing / shoe / glove-type devices. These body-worn electronic devices are easy to carry and can improve user accessibility. A "head-mounted wearable device" is a device worn on the user's head or face that projects images onto the user's retina, allowing the user to view virtual images in three-dimensional space. For example, 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 information such as buildings and objects in the user's field of vision in the form of images or text to the user. A see-closed type head-mounted wearable device can output independent images to both eyes of the user, and can provide an excellent sense of immersion by outputting content (such as games, movies, streaming, and broadcasting) provided from a mobile communication terminal or an external input in the form of images or audio to the user or individual wearing the device.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).

[0004] The above information may be provided as background information 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 in connection with the present disclosure.

[0005] According to one embodiment of the present disclosure, a camera module may include a lens assembly and an image sensor arranged to receive light focused or guided by the lens assembly. In one embodiment, the lens assembly includes at least three lenses aligned along an optical axis direction from an object side to an image side, and a first lens arranged closest to the object side among the at least three lenses may have positive refractive power and have a concave object side. In one embodiment, the lens assembly may satisfy the following [Formula 1].

[0006] [Formula 1]

[0007]

[0008] Here, 'L 1-3 ' may be the distance from the subject-side surface of the lens positioned closest to the subject to the image-side surface of the lens positioned farthest from the subject, 'f' may be the focal length of the camera module, and 'BFL' may be the distance from the image-side surface of the lens positioned farthest from the subject to the image plane. Here, 'focal length of the camera module' may mean the effective focal length of the entire camera module.

[0009] According to one embodiment of the present disclosure, an electronic device may include a camera module including a lens assembly and an image sensor arranged to receive light focused or guided by the lens assembly, and a processor configured to acquire an image of a subject using the camera module. In one embodiment, the lens assembly includes at least three lenses aligned along an optical axis direction from an object side to an image side, and a first lens arranged closest to the object side among the at least three lenses may have a positive refractive power and have a concave object side surface. In one embodiment, the lens assembly may satisfy the following [Formula 1].

[0010] [Formula 1]

[0011]

[0012] Here, 'L 1-3 ' may be the distance from the subject-side surface of the lens placed closest to the subject to the image-side surface of the lens placed farthest from the subject, 'f' may be the focal length of the camera module, and 'BFL' may be the distance from the image-side surface of the lens placed farthest from the subject to the image plane.

[0013] 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.

[0014] FIG. 1 is a block diagram illustrating an electronic device within a network environment according to one embodiment of the present disclosure.

[0015] FIG. 2 is a perspective view illustrating the internal configuration of a wearable electronic device according to one embodiment of the present disclosure.

[0016] FIG. 3 is a drawing showing the front of a wearable electronic device according to one embodiment of the present disclosure.

[0017] FIG. 4 is a drawing showing the back of a wearable electronic device according to one embodiment of the present disclosure.

[0018] FIG. 5 is an exploded perspective view of a camera module according to one embodiment of the present disclosure.

[0019] FIG. 6 is a drawing showing a camera module according to one embodiment of the present disclosure.

[0020] FIG. 7 is a graph showing spherical aberration of a camera module according to the embodiment of FIG. 6.

[0021] FIG. 8 is a graph showing the astigmatism of the camera module according to the embodiment of FIG. 6.

[0022] FIG. 9 is a graph showing the distortion of the camera module according to the embodiment of FIG. 6.

[0023] FIG. 10 is a drawing showing a camera module according to one embodiment of the present disclosure.

[0024] FIG. 11 is a graph showing spherical aberration of a camera module according to the embodiment of FIG. 10.

[0025] FIG. 12 is a graph showing astigmatism of a camera module according to the embodiment of FIG. 10.

[0026] FIG. 13 is a graph showing the distortion of the camera module according to the embodiment of FIG. 10.

[0027] FIG. 14 is a drawing showing a camera module according to one embodiment of the present disclosure.

[0028] FIG. 15 is a graph showing spherical aberration of a camera module according to the embodiment of FIG. 14.

[0029] Fig. 16 is a graph showing astigmatism of a camera module according to the embodiment of Fig. 14.

[0030] FIG. 17 is a graph showing the distortion of the camera module according to the embodiment of FIG. 14.

[0031] FIG. 18 is a drawing showing a camera module according to one embodiment of the present disclosure.

[0032] FIG. 19 is a graph showing spherical aberration of a camera module according to the embodiment of FIG. 18.

[0033] FIG. 20 is a graph showing astigmatism of a camera module according to the embodiment of FIG. 18.

[0034] FIG. 21 is a graph showing the distortion of the camera module according to the embodiment of FIG. 18.

[0035] FIG. 22 is a drawing showing a camera module according to one embodiment of the present disclosure.

[0036] FIG. 23 is a graph showing spherical aberration of a camera module according to the embodiment of FIG. 22.

[0037] FIG. 24 is a graph showing astigmatism of a camera module according to the embodiment of FIG. 22.

[0038] FIG. 25 is a graph showing the distortion of the camera module according to the embodiment of FIG. 22.

[0039] FIG. 26 is a drawing showing a camera module according to one embodiment of the present disclosure.

[0040] FIG. 27 is a graph showing spherical aberration of a camera module according to the embodiment of FIG. 26.

[0041] Fig. 28 is a graph showing astigmatism of a camera module according to the embodiment of Fig. 26.

[0042] FIG. 29 is a graph showing the distortion of the camera module according to the embodiment of FIG. 26.

[0043] Throughout the attached drawings, similar reference numbers may be assigned to similar parts, components and / or structures.

[0044] Wearable electronic devices, such as AR and VR, may be equipped with at least one camera. For example, the at least one camera may be used to track the gaze of an object or a user, such as an eye-tracking camera. To accommodate the camera in a wearable electronic device with limited space for component placement, the camera must be ultra-small. Furthermore, the camera may further include a filter or a cover glass to protect the image sensor, depending on the intended use. For example, the camera may further include a filter and a cover glass. However, miniaturizing a camera that includes such components while maximizing optical performance for placement in a wearable electronic device with limited space for component placement may be difficult.

[0045] Various embodiments of the present disclosure can provide a compactly configured camera module and an electronic device including the same for placement in a wearable electronic device having a narrow component placement space while having optimal optical performance.

[0046] Hereinafter, various embodiments of the present disclosure are described with reference to the attached drawings.

[0047] An electronic device according to various embodiments of the present disclosure may include, for example, at least one of a smart phone, a tablet PC, a mobile phone, a video phone, an e-book reader, a desktop PC, a laptop PC, a netbook computer, a workstation, a server, a PDA, a portable multimedia player (PMP), an MP3 player, a medical device, a camera, or a wearable device. The wearable device may include at least one of an accessory type (e.g., a watch, a ring, a bracelet, an anklet, a necklace, glasses, a contact lens, or a head-mounted device (HMD)), a fabric or clothing-integrated type (e.g., an electronic garment), a body-attached type (e.g., a skin pad or tattoo), or a bio-implantable circuit. In one embodiment, the electronic device may include, for example, a television, a digital video disk (DVD) player, an audio, a refrigerator, an air conditioner, a vacuum cleaner, an oven, a microwave oven, a washing machine, an air purifier, a set-top box, a home automation control panel, a security control panel, a media box (e.g., Samsung HomeSync) TM , Apple TV TM , or Google TV TM ), game consoles (e.g. Xbox TM , PlayStation TM ), may include at least one of an electronic dictionary, an electronic key, a camcorder, or an electronic picture frame. In various embodiments, the electronic device may be flexible or may be a combination of two or more of the various devices described above. The electronic device according to various embodiments of the present disclosure is not limited to the devices described above. In various embodiments of the present disclosure, the term user may refer to a person using the electronic device or a device (e.g., an artificial intelligence electronic device) using the electronic device. The electronic device according to embodiments of the present disclosure is not limited to the devices described above.

[0048] According to various embodiments, an optical device (e.g., a camera module) may be included as a representative example of the electronic device, and the description below may be based on the assumption that a lens assembly is mounted on the optical device as an example.

[0049] In describing various embodiments of the present disclosure, some numerical values ​​may be presented, but it should be noted that such numerical values ​​do not limit the various embodiments of the present disclosure unless otherwise stated in the claims.

[0050] FIG. 1 is a block diagram of an electronic device (101) within a network environment (100) according to one embodiment of the present disclosure. Referring to FIG. 1 , in the network environment (100), the electronic device (101) may communicate with the electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of the electronic device (104) or the server (108) via a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In one embodiment, the electronic device (101) may have at least one of these components (e.g., the connection terminal (178)) omitted, or one or more other components added. In one embodiment, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0051] The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or operations. According to one embodiment, as at least a part of the data processing or operations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor), or an auxiliary processor (123) (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 (121). For example, when the electronic device (101) includes the main processor (121) and the auxiliary processor (123), the auxiliary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a given function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0052] The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (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 (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (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 (101) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (108)). 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.

[0053] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0054] The program (140) may be stored as software in the memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0055] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) 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).

[0056] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) 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 one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0057] The display module (160) can visually provide information to an external party (e.g., a user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0058] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

[0059] The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) 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.

[0060] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) to an external electronic device (e.g., the electronic device (102)). In one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0061] The connection terminal (178) may include a connector through which the electronic device (101) may be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0062] The haptic module (179) 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. According to one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0063] The camera module (180) can capture still images and moving images. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0064] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

[0065] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0066] The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (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 (190) may include a wireless communication module (192) (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 (194) (e.g., a local area network (LAN) communication module, or a power line communication module). Among these communication modules, the corresponding communication module can communicate with an external electronic device via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0067] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 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 (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) 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 (192) can support various requirements specified in the electronic device (101), an external electronic device (e.g., the electronic device (104)), or a network system (e.g., the second network (199)). According to one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for 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.

[0068] The antenna module (197) 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 may include an 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 (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as the first network (198) or the second network (199), may be selected from the plurality of antennas, for example, by the communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device via the at least one selected antenna. In one 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 (197).

[0069] In one embodiment, the antenna module (197) may form a mmWave antenna module. In one 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) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.

[0070] 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)).

[0071] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) 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 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 (101). The electronic device (101) 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 technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In one embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0072] FIG. 2 is a perspective view illustrating the internal configuration of a wearable electronic device (200) according to one embodiment of the present disclosure.

[0073] According to one embodiment of the present disclosure, the wearable electronic device (200) of FIG. 2 (or the wearable electronic device (300) of FIG. 3, which will be described later) may be substantially the same as the electronic device (101) of FIG. 1 and may be implemented to be wearable on a user's body. In one embodiment, each of the external electronic devices (102, 104) of FIG. 1 may be the same or a different type of device as the electronic device (101) or the wearable electronic device (200, 300). According to one embodiment, all or part of the operations executed in the electronic device (101) or the wearable electronic device (200, 300) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when an electronic device (101) or a wearable electronic device (200, 300) needs to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) or the wearable electronic device (200, 300) may, instead of or in addition to executing the function or service on its own, request one or more external electronic devices to execute at least a part of the function or service. The one or more external electronic devices that receive the request may execute at least a part 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 (101) or the wearable electronic device (200, 300). The electronic device (101) or the wearable electronic device (200, 300) may process the result as is or additionally and provide it as at least a part of a response to the request.For example, an external electronic device (102) renders content data executed in an application and transmits it to an electronic device (101) or a wearable electronic device (200, 300), and the electronic device (101) or the wearable electronic device (200, 300) that receives the data can output the content data to a display module (e.g., a display module (160) or a light output module (211) of FIG. 1). When the electronic device (101) or the wearable electronic device (200, 300) detects a user movement through an inertial measurement unit sensor or the like, the processor (e.g., the processor (120) of FIG. 1) of the electronic device (101) or the wearable electronic device (200, 300) can correct the rendering data received from the external electronic device (102) based on the movement information and output the corrected data to the display module. Alternatively, the motion information may be transmitted to an external electronic device (102) to request rendering so that screen data is updated accordingly. According to various embodiments, the external electronic device (102) may be a device of various forms, such as a case device capable of storing and charging the electronic device (101).

[0074] Referring to FIG. 2, a wearable electronic device (200) according to one embodiment of the present disclosure may include at least one of a light output module (211), a display member (201), and a camera module (250).

[0075] According to one embodiment of the present disclosure, the light output module (211) may include a light source capable of outputting an image, and a lens for guiding the image to the display member (201). According to one embodiment of the present disclosure, the light output module (211) may include at least one of a liquid crystal display (LCD), a digital mirror device (DMD), a liquid crystal on silicon (LCoS), a light emitting diode (LED) on silicon (LEDoS), an organic light emitting diode (OLED), or a micro light emitting diode (micro LED).

[0076] According to one embodiment of the present disclosure, the display member (201) may include a light waveguide. According to one embodiment of the present disclosure, an output image of the light output module (211) incident on one end of the light waveguide may be propagated inside the light waveguide and provided to a user. According to one embodiment of the present disclosure, the display member (201) may include at least one of a diffractive optical element (DOE), a holographic optical element (HOE), or a reflective element (e.g., a reflective mirror) provided in the light waveguide. For example, the display member (201) may guide an output image of the light output module (211) to a user's eyes by including at least one diffractive optical element, a holographic optical element, or a reflective element, and / or by including an optical waveguide.

[0077] According to one embodiment of the present disclosure, the camera module (250) can capture still images and / or moving images. According to one embodiment, the camera module (250) is disposed within a lens frame and can be disposed around the display member (201).

[0078] According to one embodiment of the present disclosure, the first camera module (251) can capture and / or recognize the trajectory of the user's eye (e.g., pupil, iris) or gaze. According to one embodiment of the present disclosure, the first camera module (251) can periodically or aperiodically transmit information related to the trajectory of the user's eye or gaze (e.g., trajectory information) to a processor (e.g., processor (120) of FIG. 1).

[0079] According to one embodiment of the present disclosure, the second camera module (253) can capture an external image. When capturing an external image, the second camera module (253) can capture an image substantially in the direction toward which the user's gaze is directed.

[0080] According to one embodiment of the present disclosure, the third camera module (255) can be used for hand detection and tracking, and user gesture (e.g., hand movement) recognition. According to one embodiment of the present disclosure, the third camera module (255) can be used for 3 degrees of freedom (3DoF), 6DoF head tracking, position (space, environment) recognition, and / or movement recognition. According to one embodiment of the present disclosure, the second camera module (253) can also be used for hand detection and tracking, and user gesture recognition. According to one embodiment of the present disclosure, at least one of the first camera module (251) to the third camera module (255) can be replaced with a sensor module (e.g., a LiDAR sensor). For example, the sensor module can include at least one of a vertical cavity surface emitting laser (VCSEL), an infrared sensor, and / or a photodiode.

[0081] According to one embodiment, the wearable electronic device (200) may omit at least one of the above components, or may include one or more additional components. For example, the wearable electronic device (200) may further include an input module (260) (e.g., a microphone) or a battery (270).

[0082] According to one embodiment, the wearable electronic device (200) may include a pair of display elements (201) arranged parallel to one side of each other. For example, a user may wear the wearable electronic device (200) on the face, and the display elements (201) may be arranged to correspond to any one of the user's visual eyes while the wearable electronic device (200) is worn on the user's face. In one embodiment, when the wearable electronic device (200) includes a pair of display elements (201), the wearable electronic device (200) may provide visual information to the user through any one of the display elements (201) and / or through each display element (201).

[0083] According to one embodiment, the wearable electronic device (200) may include at least one wearing member (202a, 202b) extending from or rotatably coupled to the display member (201). In the illustrated embodiment, the wearing member (202a, 202b) may be exemplified as a structure that is rotatably coupled (or connected) to the display member (201) by a hinge structure (H). For example, the wearing member (202a, 202b) may be in a position overlapped or folded with the display member (201), in which case the user may easily carry or store the wearable electronic device (200). In one embodiment, the wearable electronic device (200) can be easily worn on the user's face at a position where the wearing member (202a, 202b) is rotated by a specified angle (e.g., approximately 90 degrees) from a position overlapping the display member (201). For example, the wearable electronic device (200) can be stably worn by supporting the display member (201) on the user's face and supporting the wearing member (202a, 202b) on the side of the user's head (e.g., the ear).

[0084] FIG. 3 is a drawing showing the front side of a wearable electronic device according to one embodiment of the present disclosure. FIG. 4 is a drawing showing the back side of a wearable electronic device according to one embodiment of the present disclosure.

[0085] Referring to FIGS. 3 and 4, in one embodiment, camera modules (311, 312, 313, 314, 315, 316) and / or depth sensors (317) for obtaining information related to the surrounding environment of the wearable electronic device (300) may be arranged on the first surface (310) of the housing.

[0086] In one embodiment, the camera modules (311, 312) can acquire images related to the environment surrounding the wearable electronic device.

[0087] In one embodiment, the camera modules (313, 314, 315, 316) can acquire images while the wearable electronic device is worn by a user. The camera modules (313, 314, 315, 316) can be used for hand detection and tracking, and user gesture (e.g., hand movement) recognition. The camera modules (313, 314, 315, 316) can be used for 3DoF, 6DoF head tracking, position (spatial, environmental) recognition, and / or movement recognition. In one embodiment, the camera modules (311, 312) can also be used for hand detection and tracking, and user gesture.

[0088] In one embodiment, the depth sensor (317) may be configured to transmit a signal and receive a signal reflected from a subject, and may be used for purposes such as time of flight (TOF) to determine the distance to an object. Instead of or in addition to the depth sensor (317), camera modules (313, 314, 315, 316) may determine the distance to an object.

[0089] According to one embodiment, a camera module (325, 326) for facial recognition and / or a display (321) (and / or a lens) may be disposed on the second side (320) of the housing.

[0090] In one embodiment, a face recognition camera module (325, 326) adjacent to the display (321) (and / or lens) may be used to recognize a user's face, or may recognize and / or track the user's two eyes(s).

[0091] In one embodiment, the display (321) (and / or lens) may be disposed on the second side (320) of the wearable electronic device (300). In one embodiment, the wearable electronic device (300) may not include camera modules (315, 316) among the plurality of camera modules (313, 314, 315, 316). Although not illustrated in FIGS. 3 and 4 , the wearable electronic device (300) may further include at least one of the configurations illustrated in FIG. 2 .

[0092] As described above, according to one embodiment, the wearable electronic device (300) may have a form factor for being worn on a user's head. The wearable electronic device (300) may further include a strap for being fixed on a body part of the user, and / or a wearing member (e.g., the wearing member (202a, 202b) of FIG. 2). The wearable electronic device (300) may provide a user experience based on augmented reality, virtual reality, and / or mixed reality while being worn on the user's head.

[0093] In examining the embodiments below, reference may be made to the electronic devices (101, 102, 104), wearable electronic devices (200, 300) and / or camera modules (180, 250, 311, 312, 313, 314, 315, 316, 325, 326) of the embodiments described above. The camera modules (400, 500, 600, 700, 800, 900, 1000) of the embodiments described below may implement at least a part or all of the camera modules (180, 250, 311, 312, 313, 314, 315, 316, 325, 326) described above. The display (321) of FIG. 4 may include a lens assembly of the embodiment described below, in which case the image sensor of the embodiment described below may be understood as the user's eye. For example, the display (321) of FIG. 4 may include lens(es) to focus or guide visual information to the user's eye.

[0094] FIG. 5 is an exploded perspective view of a camera module (400) according to one embodiment of the present disclosure.

[0095] In the embodiments described above and in the detailed description below in FIG. 5, the longitudinal direction of the electronic device (101, 102, 104), the wearable electronic device (200, 300), and / or the camera module (400) may be defined as the 'Y-axis direction', the width direction as the 'X-axis direction', and / or the height direction (thickness direction) as the 'Z-axis direction'. In the detailed description below, references to the longitudinal direction, the width direction, and / or the height direction (or thickness direction) may indicate the longitudinal direction, the width direction, and / or the height direction (or thickness direction) of the electronic device (101, 102, 104, 200, 300), and / or the camera module (400). In some embodiments, with respect to the direction in which the components are oriented, 'negative / positive (- / +)' may be mentioned together with the rectangular coordinate system illustrated in the drawings. For example, the front of the camera module (400) may be defined as a 'surface facing the +Z-axis direction', and the rear may be defined as a 'surface facing the -Z-axis direction'. According to one embodiment, the arrangement relationship in the height direction of a component or another component, that is, the criteria for up / down, may follow the +Z-axis direction / -Z-axis direction. That is, when a component is arranged above another component, it may mean that the component is arranged in the +Z-axis direction with respect to the other component, and when a component is arranged below another component, it may mean that the component is arranged in the -Z-axis direction with respect to the other component. Meanwhile, it should be noted that even if a component is arranged above or below another component, it does not mean that the entire component is located above or below the entire components of the other component. For example, a part of a component may be arranged above a part of another component, but another part of a component may be arranged below another part of the other component.In the following description, when it is said that a component overlaps (or is stacked) with another component, it should be noted that the description of the arrangement relationship in the height direction described above may be applied. According to one embodiment, in describing the components below, when it is said that a component is viewed from 'above' or from the 'top', it may refer to a view of a component viewed from the +Z-axis direction, and when it is said that a component is viewed from 'below' or from the 'back', it may refer to a view of a component viewed from the -Z-axis direction. In describing the direction, if 'yin / yang (- / +)' is not described, it may be interpreted as facing the + direction unless otherwise defined. For example, 'Z-axis direction' may be interpreted as facing the +Z direction, 'X-axis direction' may be interpreted as facing the +X-axis direction, and 'Y-axis direction' may be interpreted as facing the +Y-axis direction. When describing directions, "facing along any one of the three axes of the orthogonal coordinate system" may include facing in a direction parallel to said axis. For the sake of brevity, this description is based on the orthogonal coordinate system depicted in the drawings, and it should be noted that the description of such directions or components does not limit the various embodiments of the present disclosure.

[0096] A camera module (400) may include at least one lens (401), a lens barrel (402) surrounding at least one lens (401), a lens holder (410) for fixing the lens barrel (402), an image sensor (420), and a printed circuit board (430) on which the image sensor (420) is disposed.

[0097] At least one lens (401) may be configured to focus and / or guide light (e.g., image information about a subject) incident on the at least one lens (401). The light may be refracted while passing through the at least one lens (401). According to one embodiment, the at least one lens (401) may comprise at least three lens(es) to form a lens assembly (LA) for aberration control. According to one embodiment, the at least one lens (401) may be made of a glass material and / or a synthetic resin material.

[0098] The lens barrel (402) may generally have a cylindrical shape, and an opening may be formed on the upper surface through which light enters. The lens accommodated in the lens barrel (402) is exposed through the opening, and can refract light entering from the outside and form an image on the image formation surface (img) of the image sensor (420). The size of the image sensor (420) on which the image is formed may be large compared to the small diameter of the opening through which light enters the lens barrel (402), and accordingly, the outer diameters of the plurality of lenses may generally have a shape that becomes longer or larger as they go from the object side to the image side. The lens barrel (402) may also have a shape corresponding to the shape of the lens assembly assembled therein.

[0099] The lens holder (410) may be configured to surround the lens barrel (402). The lens holder (410) may include a fastening structure that can be fastened to the lens barrel (402), and the lens barrel (402) may have a corresponding structure so as to be coupled with the fastening structure formed in the lens holder (410). According to one embodiment, the fastening structure included in the lens holder (410) may correspond to a screw thread. According to one embodiment, the lens holder (410) is a structure that is coupled to the lens barrel (402) to form the overall appearance of the camera module, and may have a shape that is approximately hexahedral. However, the present invention is not limited thereto, and may have a structure of a cylinder, a triangular prism, or a pentagonal or larger prism. It should be noted that the lens holder (410) is not limited to a specific shape. During use of the camera module (400), the relative position between the lens holder (410) and the lens barrel (402) may be maintained in a fixed state.

[0100] The image sensor (420) is a sensor that is arranged on a printed circuit board (430) aligned with at least one lens (401) on an optical axis and can react to light. The image sensor (420) may include, for example, a sensor such as a complementary metal-oxide semiconductor (CMOS) image sensor or a charge coupled device (CCD). The image sensor (420) is not limited thereto and may include, for example, various elements that convert an image of a subject into an electrical image signal. The image sensor (420) can acquire an image of a subject by detecting brightness information, gradation information, color information, etc. of the subject from light passing through at least one lens.

[0101] The printed circuit board (430) may have a flat shape as a configuration in which an image sensor (420) is arranged on one surface. The printed circuit board (430) may include at least one component (435, 436) in addition to the image sensor (420). For example, the printed circuit board (430) may include an image signal processor (ISP), a memory (435) (e.g., EEPROM), and / or a capacitor (436) (e.g., MLCC (multilayer ceramic capacitors)). According to one embodiment, the printed circuit board (430) may additionally include a reinforcing member (437) to prevent tilting of the image sensor (420).

[0102] According to one embodiment, the camera module (400) may further include a filter (425). The filter (425) may include, for example, an IR Cut filter for blocking infrared (IR) rays or a Band pass filter for transmitting only a specific band of infrared rays. The filter (425) may be arranged to overlap with the image sensor (420).

[0103] According to one embodiment, the camera module (400) may further include a cover glass (440). The cover glass (440) is configured to cover the image sensor (420) and may be positioned between the filter (425) and the image sensor (420).

[0104] According to one embodiment, the camera module (400) may be a camera module that applies the CSP (chip scale package) method as a technology for packaging the image sensor (420). The CSP method may be a method that primarily packages a chip and connects the printed circuit board (430) and the image sensor (420) without a wire bonding process. Compared to the COB (chip on board) method as an image sensor packaging technology, the CSP method may have a relatively low possibility of being exposed to external contamination during the manufacturing process. In addition, since the CSP method can be performed in a wafer-level manufacturing process, unlike the COB method that requires a chip-level manufacturing process, the CSP method may have higher productivity than the COB method. Considering these advantages, the electronic device of the present disclosure may include a camera module applied with the CSP method. According to the CSP method, at least one lens (401), a lens barrel (402), and a lens holder (410) may be assembled in a state in which the image sensor (420), a filter, and / or a cover glass are packaged together. According to one embodiment, the printed circuit board (430) can be connected to other components (e.g., the processor (120) of FIG. 1) within the wearable electronic device (300) using a flexible printed circuit board (431). According to one embodiment, a connector (432) is provided at an end of the flexible printed circuit board (431) so as to be electrically connected to other components and / or other printed circuit boards within the wearable electronic device (300).

[0105] According to one embodiment, the camera module (400) may further include a lens cover member (450). For example, the lens cover member (450) may be a cover tape. According to one embodiment, the lens cover member (450) may be used to make the appearance of the camera module (400) more attractive, or the lens cover member (450) may be used to prevent the camera module (400) from moving within the electronic device.

[0106] Hereinafter, with reference to FIGS. 6 to 29, implementation examples of the camera module (400) and / or lens assembly described above will be described. The electronic device (101, 102, 104, 200, 300) of the present disclosure may include a camera module (400) including at least three lenses. For example, as an example of a camera module (400) including at least three lenses, the embodiments of FIGS. 6 to 25 disclose camera modules (500, 600, 700, 800, 900) including three lenses, and the embodiments of FIGS. 26 to 29 disclose camera modules (1000) including four lenses.

[0107] FIG. 6 is a diagram illustrating a camera module according to an embodiment of the present disclosure. FIG. 7 is a graph illustrating spherical aberration of the camera module according to the embodiment of FIG. 6. FIG. 8 is a graph illustrating astigmatism of the camera module according to the embodiment of FIG. 6. FIG. 9 is a graph illustrating distortion of the camera module according to the embodiment of FIG. 6.

[0108] The camera module (500) may include three lens(es) (e.g., L1, L2, L3) and an image sensor (IS). In the embodiment of FIG. 6, the camera module (500) may further include a filter (F) and a cover glass (G). Here, the filter (F) may be a band pass filter. For example, the filter may be a filter that passes light in a band of approximately 850,0000 nm, and the camera module (500) including the same may be placed near a user's eye in a wearable electronic device and used as a camera for eye tracking.

[0109] Three lens(es) (e.g., L1, L2, L3) may constitute a lens assembly. Here, the lens assembly may be understood to include, for example, three lens(es) (e.g., L1, L2, L3) and a lens holder (e.g., lens holder (410) of FIG. 5) that fixes or supports the three lens(es) (e.g., L1, L2, L3).

[0110] A camera module (500) including three lens(es) (e.g., L1, L2, L3) may have an angle of view of approximately 70 degrees or more and approximately 90 degrees or less. For example, the angle of view of the camera module (500) may be approximately 80 degrees. In addition, the image sensor (IS) is an ultra-small image sensor disposed in a wearable electronic device and may have an image height (IMG HT) of approximately 0.7 mm. For reference, the image height here may mean half of the diagonal length of the image sensor in an image sensor that is approximately rectangular (e.g., square) in shape and thin with the optical axis (OI) as the normal.

[0111] The three lens(es) (e.g., L1, L2, L3) can be aligned on an optical axis (OI) that extends from the subject (or external object) side (O, object side) to the image side (I, image side). The optical axis (OI) can be substantially parallel to the directional component Z mentioned above in FIG. 5. In addition, the imaging plane (img) of the image sensor (IS) can be parallel to an imaginary plane formed by the directional components X and Y. In describing the configuration of each lens below, for example, the object side can indicate the direction in which the subject is located, and the image side can indicate the direction in which the imaging plane (img) on ​​which an image is formed is located. In addition, the "subject-facing side" of the lens refers to, for example, the side on the side where the subject is based on the optical axis (OI), and may refer to the left surface (or front surface) of the lens in the drawings according to various embodiments of the present disclosure, and the "image-facing side" refers to the side on the side where the imaging plane (img) is based on the optical axis (OI), and may refer to the right surface (or back surface) of the lens in the drawings. Here, the imaging plane (img) may be, for example, a part where an image pickup element or an image sensor (IS) is arranged to form an image.

[0112] Among the plurality of lenses included in the camera module (500), with respect to at least one lens, looking toward the subject side (O) along the optical axis (OI) can be defined as facing the first direction, and looking toward the image side (I) along the optical axis (OI) can be defined as facing the second direction. When a certain lens (e.g., the first lens (L1)) includes a surface facing the subject side (O), the surface facing the subject side (O) can be said to face the first direction. And, when a certain lens (e.g., the first lens (L1)) includes a surface facing the image side (I), the surface facing the image side (I) can be said to face the second direction. The first direction and the second direction can be parallel to the direction component Z of FIG. 5.

[0113] In describing three lens(es) (e.g., L1, L2, L3), the side of each lens closer to the optical axis (OI) may be referred to as a 'chief portion', and the 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 the first lens (L1) that intersects the optical axis (OI). The marginal portion may be, for example, a portion of the 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.

[0114] The first lens (L1) included in the camera module (500) may have positive refractive power, the second lens (L2) may have negative refractive power, and the third lens (L3) may have positive refractive power. In the above-described embodiments, when light parallel to the optical axis (OI) 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 (OI) is incident on a lens having negative refractive power, the light passing through the lens may be dispersed. For example, the lens having negative refractive power may be a lens based on the principle of a concave lens.

[0115] The first lens (L1) may be configured as a small-diameter lens having a smaller effective diameter than the second lens (L2) and the third lens (L3). In addition, the second lens (L2) may be configured as a small-diameter lens having a smaller effective diameter than the third lens (L3). Here, the term "effective diameter" may refer to a substantial area through which light passes, excluding a flange (rib), on one surface of the lens. The length of the effective diameter may refer to the distance between the end of one boundary of the substantial area through which light passes and the end of the other boundary in a direction perpendicular to the optical axis (OI). Since the lenses in a wearable electronic device must be installed within a limited space, the refractive indexes of the first lens (L1), the second lens (L2), and the third lens (L3) are sequentially increased, and by configuring the first lens (L1) as a lens having positive refractive power, the second lens (L2) as a lens having negative refractive power, and the third lens (L3) as a lens having positive refractive power, the overall length of the camera module (500) can be reduced. In addition, according to one embodiment, the outer diameter of the lenses can be minimized by arranging an aperture (sto) that determines the F-number (F-no) of the camera module (500) in front of the first lens (L1) (e.g., on the subject side (O).

[0116] Referring to FIG. 6, the first lens (L1) may be formed as a meniscus lens in which a surface (S2) facing the subject side (O) is concave toward the subject side (O) and a surface (S3) facing the image side (I) is also concave toward the subject side (O) (convex toward the image side (I)). The second lens (L2) may also be formed as a meniscus lens in which a surface (S4) facing the subject side (O) is concave toward the subject side (O) and a surface (S5) facing the image side (I) is also concave toward the subject side (O) (convex toward the image side (I)). The third lens (L3) can be formed as a biconvex lens in which the surface (S6) facing the subject side (O) is convex toward the subject side (O) and the surface (S7) facing the image side (I) is concave toward the subject side (O) (convex toward the image side).

[0117] At least one of the surfaces (S2, S3, S4, S5, S6, S7) of the first lens (L1), the second lens (L2), and the third lens (L3) can be formed as an aspheric surface. This can prevent spherical aberration. In the various embodiments described below, it can be exemplified that the first lens (L1), the second lens (L2), and the third lens (L3) are all implemented as aspherical surfaces.

[0118] Unless otherwise specified, the radius of curvature, thickness, TTL (total track length), focal length, etc. of the lens of the present disclosure may all be expressed in mm. In addition, the thickness of the lens, the spacing between lenses, and the TTL (or OAL (overall length)) 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. And in the detailed description and claims below, the inflection point may mean a point where the radius of curvature changes at a part that does not intersect the optical axis. And the inflection point may be located at a point where one surface of the lens changes from a convex shape to a concave shape, or from a concave shape to a convex shape.

[0119] The camera module (500) may include, in order from the object side, three lenses having positive, negative, and positive refractive powers, one filter (F) (e.g., a band pass filter), and a cover glass (G). At this time, the angle of view is approximately 80 degrees, and the height of the image is approximately 0.7 mm, so that a compact camera module (500) can be implemented.

[0120] The camera module (500) may be implemented with lenses, for example, each made of a synthetic resin (e.g., plastic) having a predetermined refractive index. The plurality of lenses may be made of a synthetic resin material, allowing for miniaturization and lightweighting, and may have a high degree of design freedom in terms of size and shape. For example, in terms of refractive indices at a specific wavelength of visible light (e.g., 587.6000 nm, D-line), the first lens (L1) may be formed of a synthetic resin lens having a refractive index of 1.55 or less, and the second lens (L2) may be formed of a synthetic resin lens having a refractive index of 1.66 or more. Through such a refractive index design, miniaturization of the lens assembly and / or the electronic device including the same may be possible. According to one embodiment, a lens made of a synthetic resin (e.g., plastic) may have a tendency for the Abbe's number to increase or decrease as the refractive index decreases or increases.

[0121] In the three lens(es) (e.g., L1, L2, L3) constituting the camera module (500), the closer the gap between one lens and another adjacent lens, the shorter the overall length (the overall length of the lens assembly in the optical axis direction) of the camera module (500). For example, when making the camera module (500) and / or electronic device according to various embodiments of the present disclosure into a small size, it is advantageous to keep the overall length of the camera module (500) as short as possible.

[0122] The camera module (500) may include at least one aperture (stop, sto). By adjusting the size of the aperture, the amount of light reaching the imaging plane (img) of the image sensor (IS) may be adjusted. The position of the aperture (stop) may be arranged between the first lens (L1) and the subject, according to one embodiment. According to various embodiments of the present disclosure, by arranging the aperture (stop; sto), which determines the F-number (F-no) of the camera module, between the first lens (L1) and the subject, the effective diameter of the first lens (L1) may be minimized while the angle of view is approximately 80 degrees, and a compact camera module (500) may be implemented.

[0123] The camera module (500) may further include a filter (F) disposed between the third lens (L3) and the image sensor (IS). The filter (F) may block light, such as infrared rays, detected by the film or image sensor of the optical device. The filter (F) may include, for example, a band pass filter or an IR cut filter. For example, when the filter (F) is mounted, the color of an image, such as one detected and captured by the image sensor (IS), may be made closer to the color sensed by a person when viewing an actual object. In addition, the filter (F) may transmit visible light and emit infrared rays to the outside, thereby preventing infrared rays from being transmitted to the imaging surface (img) of the image sensor.

[0124] The camera module (500) can secure sufficient BFL (back focal length) while configuring a small camera module (500) by satisfying the following [Formula 1].

[0125] [Formula 1]

[0126]

[0127] Here, 'L 1-3' is the distance from the subject-side (O) surface of the first lens (L1) arranged closest to the subject side to the image-side surface of the third lens (L3) arranged farthest from the subject side (O), 'f' is the focal length of the camera module, and 'BFL' may be the distance from the image-side surface of the third lens (L3) arranged farthest from the subject side (O) to the imaging plane (img). If the value of [Formula 1] exceeds the upper limit, the BFL becomes short, making it difficult to apply an image sensor including a filter and / or cover glass (e.g., a CSP type image sensor), or the lens size may be excessively large, making it difficult to implement a compact camera module. Even if it is below the lower limit, the BFL may be excessively large compared to the overall length of the camera module, making it difficult to implement a compact camera module.

[0128] Additionally, the camera module (500) can satisfy the following [Formula 2].

[0129] [Formula 2]

[0130]

[0131] Here, 'L 1-3 'IH' is the distance from the subject-side surface of the first lens arranged closest to the subject to the image-side surface of the third lens arranged farthest from the subject, and 'IH' may be the maximum height of the image plane (e.g., image height). If the value of [Formula 2] exceeds the upper limit, the lens size may be excessively large compared to the image height of the image sensor, making it difficult to miniaturize the camera module, and if it falls below the lower limit, the lens size may become so small that it cannot be manufactured with synthetic resin material.

[0132] Additionally, the camera module (500) can satisfy the following [Formula 3].

[0133] [Formula 3]

[0134]

[0135] Here, 'BFL' is the distance from the image side of the third lens positioned furthest from the subject to the image plane, and 'f' may be the focal length of the camera module. If the value of [Formula 3] exceeds the upper limit, the BFL becomes excessively large compared to the focal length, making it difficult to correct astigmatism and miniaturizing the camera module. If it falls below the lower limit, the BFL becomes small, which may lead to insufficient mounting space for the image sensor including the filter and / or cover glass.

[0136] Additionally, the camera module (500) can satisfy the following [Equation 4].

[0137] [Formula 4]

[0138] 50≤Vd1≤60

[0139] Here, 'Vd1' may be the Abbe number of the first lens (L1). If the Abbe number of the first lens exceeds the upper limit of the above formula 4, application to synthetic resin materials may be difficult, and if it falls below the lower limit, chromatic aberration correction (in the case of a visible lens) may be difficult due to the low Abbe number. According to one embodiment, the Abbe number of the first lens (L1) may be greater than the Abbe numbers of other lenses. According to one embodiment, in a camera module satisfying the above [Formula 1], astigmatism may occur, but since the first lens (L1) has a meniscus shape in which both the subject-side surface and the image-side surface are concave toward the subject side (O), astigmatism can be effectively corrected.

[0140] Additionally, the camera module (500) can satisfy the following [Formula 5].

[0141] [Formula 5]

[0142] 1.6≤nd2≤1.75

[0143] Here, 'nd2' may be the refractive index of the second lens. According to one embodiment, the refractive index of the second lens (L2) may be the refractive index when light having a wavelength of approximately 850.0000 nm is incident on the camera module (500). According to one embodiment, the second lens (L2) may have a meniscus shape in which both the subject-side surface and the image-side surface are concave toward the subject. Since the second lens (L2) has a meniscus shape, astigmatism can be effectively corrected. If it is below the lower limit in [Equation 5], it is difficult to miniaturize the camera module due to the low refractive index of the second lens (L2), and if it is above the upper limit in [Equation 5], it is difficult to apply a synthetic resin material, which may increase the manufacturing cost and make it difficult to reduce the weight of the product. By ensuring that the second lens (L2) has a high refractive index, the angle of view of the camera module can be secured to be between approximately 70 degrees and approximately 90 degrees, while miniaturization of the camera module is possible. By ensuring that the first lens (L1) has a low refractive index and a high Abbe number, and by forming the second lens (L2) with a material that has a high refractive index and a low Abbe number, chromatic aberration can be effectively controlled.

[0144] According to various embodiments, the camera module (500) may include a flash, an image sensor (IS), an image stabilizer, memory, or an image signal processor.

[0145] The following [Table 1] may describe various data regarding three lens(es) (e.g., L1, L2, L3) and components (e.g., filter (F) and cover glass (G)) included in the camera module (500). 'obj' may refer to an object, and 'img' may refer to an imaging surface of an image sensor (IS). 'S1' may refer to the position of an aperture (stop; sto). 'S2 to S11' may refer to the surfaces of three lens(es) (e.g., L1, L2, L3), a filter (F), and a cover glass (G). In addition, y radius may refer to a radius of curvature of a lens, Thickness may refer to a thickness or air gap of a lens, Nd may refer to a refractive index of a medium (e.g., lens), and Vd may refer to an Abbe number of a lens. The following [Table 1] may be data for a camera module (500) having an F-number (F-no) of approximately 2.2, a half field of view (HFoV) of approximately 39.85 degrees, a focal length of approximately 0.839 mm, and an image sensor (IS) height of elevation (IMG HT) of 0.704. The camera module (500) may include three lenses (e.g., L1, L2, L3) and components (e.g., a filter (F) and a cover glass (G)) having the data of [Table 1], and may satisfy the above-described formula (and / or at least one of the above-described formulas).

[0146] Lens surface (surface)Lens surface type (surface type)Radius of curvature (y radius)Thickness (Thickness)Refractive index (Nd)Abbe number (Vd)Focal length (EFL)objSphereInfinity25.000 S1SphereInfinity0.010 S2Asphere-24.3470.2791.53500255.75260.747S3Asphere-0.3890.192 S4Asphere-0.1790.2051.6707419.2299-1.291S5Asphere-0.3300.020 S6Asphere0.9630.2831.6707419.22991.172S7Asphere-3.1260.020 S8SphereInfinity0.2101.51679864.1983 S9SphereInfinity0.100 S10SphereInfinity0.4001.51679864.1983 S11SphereInfinity0.126 imgSphereInfinity0.000

[0147] The refractive index data of the above [Table 1] may represent the refractive index at a wavelength of, for example, 850.0000 nm. In addition to the above [Table 1], the present disclosure may be applied to camera modules according to various embodiments described in the following [Table 3], [Table 5], [Table 7], [Table 9], and [Table 11]. The following [Table 2] describes the aspherical coefficients of the three lens(es) (e.g., L1, L2, L3) included in the camera module (500), and the aspherical coefficients can be calculated through the following [Equation 6].

[0148] [Formula 6]

[0149]

[0150] Here, 'x' is the distance (sag) from the vertex of the lens in the direction of the optical axis (OI), 'R' is the radius of curvature at the vertex of the lens, 'y' is the distance in the direction perpendicular to the optical axis, 'K' is the Conic constant, and 'A' is the i ' can each mean the aspherical coefficient.

[0151] 렌즈면(surface)S2S3S4S5S6S7k9.9000E+016.5096E-01-7.4043E-01-6.9843E-01-8.5573E+01-7.1144E+01A4-2.2032E+00-2.5041E-011.0131E+011.4328E+006.0227E+00-1.6915E+00A6-3.3220E+021.6353E+025.5346E+021.3033E+02-9.5268E+013.0145E+01A83.3644E+04-7.2684E+03-2.3727E+04-2.5658E+031.1570E+03-2.2557E+02A 10 -1.9988E+061.8646E+055.2378E+052.2976E+04-1.0445E+041.2650E+03A 12 6.6457E+07-2.3960E+06-6.4128E+06-1.0389E+056.7108E+04-5.3001E+03A 14 -1.2464E+091.2585E+074.1204E+071.9086E+05-2.9541E+051.4265E+04A 16 1.2208E+100.0000E+00-1.0459E+080.0000E+008.3607E+05-2.2415E+04A 18 -4.7969E+100.0000E+000.0000E+000.0000E+00-1.3630E+061.8622E+04A 20 0.0000E+000.0000E+000.0000E+000.0000E+009.7219E+05-6.3129E+03

[0152] FIG. 7 is a graph showing spherical aberration of a camera module (500) according to the embodiment of FIG. 6. Spherical aberration may be a phenomenon in which the focal points of light passing through different portions of a lens (e.g., a chief portion and a marginal portion) are different. In FIG. 7, 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 may be represented, for example, for light having a wavelength of approximately 870.0000 nm (nanometer), approximately 860.0000 nm, approximately 850.0000 nm, approximately 840.0000 nm, or approximately 830.0000 nm, respectively. Referring to FIG. 7, 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 within +0.025 to -0.025, thereby exhibiting stable optical characteristics. FIG. 8 is a graph showing astigmatism of the camera module (500) according to the embodiment of FIG. 6. Astigmatism may be a case where the focal points of light passing through the vertical and horizontal directions are misaligned when the tangential plane (or meridional plane) and the sagittal plane of the lens have different radii.

[0153] In FIG. 8, the astigmatism of the camera module (500) is a result obtained at a wavelength of approximately 850.0000 nm, where the dotted line represents the astigmatism (T) in the tangential direction (e.g., meridional curvature), and the solid line represents the astigmatism (S) in the sagittal direction (e.g., spherical curvature). As can be confirmed through FIG. 8, it can be confirmed that the astigmatism according to various embodiments of the present disclosure is generally limited to within +0.050 to -0.050, thereby exhibiting stable optical characteristics.

[0154] Fig. 9 is a graph showing the distortion of the camera module (500) according to the embodiment of Fig. 6. Distortion occurs because the optical magnification varies depending on the distance from the optical axis (OI), and the image formed on the actual imaging plane (e.g., the imaging plane (img) of Fig. 6) may appear larger or smaller than the image formed on the theoretical imaging plane.

[0155] In Fig. 9, the distortion of the camera module (500) is a result obtained at a wavelength of approximately 850.0000 nm, and an image captured through the camera module (500) may be somewhat distorted at a point deviating from the optical axis (OI). However, such distortion is at a level that may generally appear in a camera module including a lens. According to one embodiment of the present disclosure, the distortion of the camera module (500) may provide good optical characteristics as the distortion rate is less than approximately 2.5%.

[0156] FIG. 10 is a diagram illustrating a camera module according to an embodiment of the present disclosure. FIG. 11 is a graph illustrating spherical aberration of the camera module according to the embodiment of FIG. 10. FIG. 12 is a graph illustrating astigmatism of the camera module according to the embodiment of FIG. 10. FIG. 13 is a graph illustrating distortion of the camera module according to the embodiment of FIG. 10.

[0157] The description of the camera module (500) according to the embodiments described above in FIGS. 6 to 9 may be applied to camera modules (600, 700, 800, 900, 1000) in various other embodiments described below. Some of the camera modules (600, 700, 800, 900, 1000) may have the same lens properties (e.g., angle of view, focal length, autofocus, F-number, or optical zoom), or at least one camera module may have one or more lens properties that are different from the lens properties included in the other camera modules. The camera modules (500, 600, 700, 800, 900, 1000) may include a flash, an image sensor (IS), an image stabilizer, a memory, or an image signal processor.

[0158] In describing various embodiments 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.

[0159] Referring to FIGS. 10 to 13 together, the camera module (600) may include three lens(es) (e.g., L1, L2, L3), a cover glass (G), and an image sensor (IS).

[0160] [Table 3] below may describe various data regarding three lens(es) (e.g., L1, L2, L3) and components (e.g., cover glass (G)) included in the camera module (600). 'obj' may refer to an object, and 'img' may refer to an imaging surface of an image sensor (IS). 'S2 to S9' may refer to three lens(es) (e.g., L1, L2, L3) and the surface of the cover glass (G). [Table 3] below may be data regarding a camera module (600) having an F-number (F-no) of approximately 2.2, a half field of view (HFoV) of approximately 39.22 degrees, a focal length of approximately 0.838 mm, and an image sensor (IS) having an image height (IMG HT) of 0.704. The camera module (600) may include three lenses (e.g., L1, L2, L3) and components (e.g., cover glass (G)) having data in [Table 3], and may satisfy the above-described formula (and / or at least one of the above-described formulas).

[0161] Lens surface (surface)Lens surface type (surface type)Radius of curvature (y radius)Thickness (Thickness)Refractive index (Nd)Abbe number (Vd)Focal length (EFL)objSphereInfinity25.000S1SphereInfinity0.010S2Asphere-1000.0000.2791.54397255.9280.731S3Asphere-0.3920.191S4Asphere-0.1810.1901.67 07419.2299-1.138S5Asphere-0.3390.020S6Asphere1.0070.2701.6707419.22991.102S7Asphere-2. 1710.200S8SphereInfinity0.4001.51679864.1983S9SphereInfinity0.179imgSphereInfinity0.000

[0162] The refractive index data in [Table 3] above may represent the refractive index at a wavelength of, for example, 850.0000 nm. [Table 4] below may describe the aspherical coefficients of the three lens(es) (e.g., L1, L2, L3) included in the camera module (600).

[0163] Lens surfaceS2S3S4S5S6S7k9.9000E+015.7548E-01-7.3832E-01-6.9720E-01-8.7 709E+01-9.9000E+01A4-4.5565E+001.1913E+001.3959E+011.8349E+004.0675E+00 -2.5402E+00A61.5235E+021.0701E+011.8452E+021.0073E+02-5.2366E+014.7167E +01A8-1.4661E+04-1.1119E+03-8.6451E+03-1.9974E+035.6844E+02-4.2146E+02A 10 5.9249E+054.5927E+041.8360E+051.7815E+04-4.9315E+032.6984E+03A 12 -1.2277E+07-7.3833E+05-2.0729E+06-8.1304E+043.1868E+04-1.1776E+04A 14 9.9758E+074.4974E+061.1805E+071.5143E+05-1.4552E+053.2085E+04A 16 1.8691E+080.0000E+00-2.3308E+070.0000E+004.3440E+05-5.1252E+04A 18 -4.4807E+090.0000E+000.0000E+000.0000E+00-7.5860E+054.3711E+04A 20 0.0000E+000.0000E+000.0000E+000.0000E+005.9107E+05-1.5341E+04

[0164] The longitudinal spherical aberration of FIG. 11 can be represented for light having a wavelength of, for example, approximately 870.0000 nm (nanometer), approximately 860.0000 nm, approximately 850.0000 nm, approximately 840.0000 nm, or approximately 830.0000 nm, respectively. The astigmatism of FIG. 12 can represent a result obtained for light having a wavelength of approximately 850.0000 nm. The distortion of FIG. 13 can also represent a result obtained for light having a wavelength of approximately 850.0000 nm. FIG. 14 is a diagram illustrating a camera module according to an embodiment of the present disclosure. FIG. 15 is a graph illustrating spherical aberration of the camera module according to the embodiment of FIG. 14. FIG. 16 is a graph illustrating astigmatism of the camera module according to the embodiment of FIG. 14. FIG. 17 is a graph illustrating distortion of the camera module according to the embodiment of FIG. 14.

[0165] Referring to FIGS. 14 to 17, the camera module (700) may include three lenses (L1, L2, L3), a filter (F), a cover glass (G), and an image sensor (IS). Here, the filter (F) may be an IR cut filter that transmits light in the visible light band and blocks infrared (IR) light.

[0166] The following [Table 5] may describe various data regarding three lens(es) (e.g., L1, L2, L3) and components (e.g., filter (F) and / or cover glass (G)) included in a camera module (700). 'obj' may refer to an object, and 'img' may refer to an imaging surface of an image sensor (IS). 'S2 to S11' may refer to surfaces of three lens(es) (e.g., L1, L2, L3), a filter (F), and a cover glass (G). The following [Table 5] may be data regarding a camera module (700) having an F-number (F-no) of approximately 2.2, a half field of view (HFoV) of approximately 39.98 degrees, a focal length of approximately 0.838 mm, and an image sensor (IS) having an image height (IMG HT) of 0.704. The camera module (700) may include three lenses (e.g., L1, L2, L3) and components (e.g., filter (F) and cover glass (G)) having data in [Table 5], and may satisfy the above-described formula (and / or at least one of the above-described formulas).

[0167] Lens surface (surface)Lens surface type (surface type)Radius of curvature (y radius)Thickness (Thickness)Refractive index (Nd)Abbe number (Vd)Focal length (EFL)objSphereInfinity25.000S1SphereInfinity0.010S2Asphere-34.5320.3001.54397255.9280.696S3Asphere-0.3780.186S4Asphere-0.1680.1901.6707419.2299-0.586S5Asphere-0.42 30.020S6Asphere0.6720.4541.54397255.9280.726S7Asphere-0.7370.020S8SphereInfinity0.2101.51679864.1983S 9SphereInfinity0.100S10SphereInfinity0.4001.51679864.1983S11SphereInfinity0.092imgSphereInfinity0.000

[0168] The refractive index data in [Table 5] above may represent the refractive index at a wavelength of, for example, 587.6000 nm. [Table 6] below may describe the aspherical coefficients of the three lenses (e.g., L1, L2, L3) included in the camera module (700).

[0169] Lens surfaceS2S3S4S5S6S7k-9.9000E+015.1252E-01-7.5736E-01-7.7685E-01-2. 8214E+01-1.3007E+01A4-3.9489E+001.4373E+002.3671E+012.1045E+002.0537E+00 -3.9034E+00A65.6267E+015.4621E+01-2.1619E+016.8696E+01-4.0057E+013.3014 E+01A8-1.2168E+03-2.7072E+03-4.3145E+03-1.1650E+035.7244E+02-2.0232E+02A 10 -2.9461E+057.3983E+041.0754E+058.4086E+03-5.3836E+039.6804E+02A 12 1.9413E+07-9.5242E+05-1.1166E+06-3.1133E+043.3723E+04-2.9774E+03A 14 -5.2144E+085.0222E+065.0587E+064.7534E+04-1.3892E+055.4527E+03A 16 6.3997E+090.0000E+00-3.2217E+060.0000E+003.6001E+05-5.7516E+03A 18 -2.9142E+100.0000E+000.0000E+000.0000E+00-5.3129E+053.2299E+03A 20 0.0000E+000.0000E+000.0000E+000.0000E+003.3997E+05-7.4853E+02

[0170] The longitudinal spherical aberration of FIG. 15 can be represented, for example, for light having a wavelength of approximately 656.3000 nm (nanometer), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, or approximately 435.8000 nm, respectively. The astigmatism of FIG. 16 can represent a result obtained for light having a wavelength of approximately 546.1000 nm. The distortion of FIG. 17 can also represent a result obtained for light having a wavelength of approximately 546.1000 nm. FIG. 18 is a diagram illustrating a camera module according to an embodiment of the present disclosure. FIG. 19 is a graph illustrating spherical aberration of the camera module according to the embodiment of FIG. 18. FIG. 20 is a graph illustrating astigmatism of the camera module according to the embodiment of FIG. 18. FIG. 21 is a graph illustrating distortion of the camera module according to the embodiment of FIG. 18.

[0171] Referring to FIGS. 18 to 21, the camera module (800) may include three lens(es) (e.g., L1, L2, L3), a cover glass (G), and an image sensor (IS).

[0172] [Table 7] below may describe various data regarding three lens(es) (e.g., L1, L2, L3) and components (e.g., cover glass (G)) included in a camera module (800). 'obj' may refer to an object, and 'img' may refer to an imaging surface of an image sensor (IS). 'S2 to S9' may refer to three lens(es) (e.g., L1, L2, L3) and the surface of the cover glass (G). [Table 7] below may be data regarding a camera module (800) having an F-number (F-no) of 2.2, a half field of view (HFoV) of 39.81 degrees, a focal length of 0.838 mm, and an image sensor (IS) having an image height (IMG HT) of 0.704. The camera module (800) may include three lenses (e.g., L1, L2, L3) and components (e.g., filter (F) and cover glass (G)) having data in [Table 7], and may satisfy the above-described formula (and / or at least one of the above-described formulas).

[0173] Lens surface (surface)Lens surface type (surface type)Radius of curvature (y radius)Thickness (Thickness)Refractive index (Nd)Abbe number (Vd)Focal length (EFL)objSphereInfinity25.000S1SphereInfinity0.010S2Asphere-1000.0000.3031.54397255.9280.659S3Asphere-0.3600.173S4Asphere-0.1690.1901.67 07419.2299-0.637S5Asphere-0.4020.020S6Asphere0.6820.3641.54397255.9280.795S7Asphere-0. 9710.280S8SphereInfinity0.4001.51679864.1983S9SphereInfinity0.071imgSphereInfinity0.000

[0174] The refractive index data in [Table 7] above may represent the refractive index at a wavelength of, for example, 587.6000 nm. [Table 8] below may describe the aspherical coefficients of the three lens(es) (e.g., L1, L2, L3) included in the camera module (800).

[0175] Lens surfaceS2S3S4S5S6S7k9.9000E+013.6532E-01-7.5623E-01-7.1447E-01-3.1 728E+01-2.9618E+01A4-3.3924E+002.3980E+002.4327E+012.3183E+002.4955E+00 -4.4472E+00A6-9.4913E+012.4524E+01-2.1859E+018.9387E+01-2.7636E+015.576 6E+01A81.5189E+04-1.6226E+03-4.7921E+03-1.6615E+033.5635E+02-4.2355E+02A 10 -1.2932E+065.1343E+041.1789E+051.2926E+04-3.4395E+032.5640E+03A 12 5.4050E+07-7.1914E+05-1.2426E+06-5.1024E+042.3450E+04-1.0178E+04A 14 -1.1985E+094.0733E+065.8284E+068.2594E+04-1.0834E+052.4033E+04A 16 1.3263E+100.0000E+00-4.8864E+060.0000E+003.1798E+05-3.2495E+04A 18 -5.6979E+100.0000E+000.0000E+000.0000E+00-5.3272E+052.3260E+04A 20 0.0000E+000.0000E+000.0000E+000.0000E+003.8595E+05-6.8395E+03

[0176] The longitudinal spherical aberration of FIG. 19 can be represented, for example, for light having a wavelength of approximately 656.3000 nm (nanometer), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, or approximately 435.8000 nm, respectively. The astigmatism of FIG. 20 can represent a result obtained for light having a wavelength of approximately 546.1000 nm. The distortion of FIG. 21 can also represent a result obtained for light having a wavelength of approximately 546.1000 nm. FIG. 22 is a diagram illustrating a camera module according to an embodiment of the present disclosure. FIG. 23 is a graph illustrating spherical aberration of the camera module according to the embodiment of FIG. 22. FIG. 24 is a graph illustrating astigmatism of the camera module according to the embodiment of FIG. 22. FIG. 25 is a graph illustrating distortion of the camera module according to the embodiment of FIG. 22.

[0177] Referring to FIGS. 22 to 25, the camera module (900) may include three lenses (e.g., L1, L2, L3), a filter (F), and an image sensor (IS). Here, the filter (F) may be an IR cut filter.

[0178] [Table 9] below may describe various data regarding three lens(es) (e.g., L1, L2, L3) and components (e.g., filter (F)) included in the camera module (900). 'obj' may refer to an object, and 'img' may refer to an imaging surface of an image sensor (IS). 'S2 to S9' may refer to three lens(es) (e.g., L1, L2, L3) and surfaces of the filter (F). [Table 9] below may be data regarding a camera module (900) having an F-number (F-no) of approximately 2.2, a half field of view (HFoV) of approximately 40.3 degrees, a focal length of approximately 0.838 mm, and an image sensor (IS) having an image height (IMG HT) of 0.704. The camera module (900) may include three lenses (e.g., L1, L2, L3) and components (e.g., filter (F)) having data of [Table 9], and may satisfy the above-described equation (and / or at least one of the above-described equations).

[0179] Lens surface (surface)Lens surface type (surface type)Radius of curvature (y radius)Thickness (Thickness)Refractive index (Nd)Abbe number (Vd)Focal length (EFL)objSphereInfinity25.000S1SphereInfinity0.010S2Asphere-6.2490.3061.54397255.9280.736S3Asphere-0.3840.203S4Asphere-0.1690.1901.670 7419.2299-0.544S5Asphere-0.4530.020S6Asphere0.6250.5371.54397255.9280.683S7Asphere-0.6 470.050S8SphereInfinity0.2101.51679864.1983S9SphereInfinity0.426imgSphereInfinity0.000

[0180] The refractive index data in [Table 9] above may represent the refractive index at a wavelength of, for example, 587.6000 nm. [Table 10] below may describe the aspherical coefficients of the three lenses (e.g., L1, L2, L3) included in the camera module (900).

[0181] Lens surfaceS2S3S4S5S6S7k1.1135E+004.3133E-01-7.5763E-01-8.0282E-01-1.7 480E+01-1.1190E+01A4-3.5018E+009.6061E-012.4102E+012.1230E+002.3414E-01 -4.3578E+00A6-7.0799E+005.9858E+01-1.0013E+024.4029E+01-6.9392E+003.482 2E+01A84.9782E+03-2.7065E+03-1.4363E+03-7.1576E+021.2269E+02-2.0540E+02A 10 -5.8358E+056.6294E+044.9851E+044.8210E+03-1.1966E+038.5640E+02A 12 2.6302E+07-7.9237E+05-4.7601E+05-1.6925E+047.5083E+03-2.2218E+03A 14 -5.9353E+083.9052E+061.4336E+062.4937E+04-3.0503E+043.4328E+03A 16 6.5133E+090.0000E+004.4381E+060.0000E+007.6774E+04-3.0714E+03A 18 -2.7321E+100.0000E+000.0000E+000.0000E+00-1.0856E+051.4700E+03A 20 0.0000E+000.0000E+000.0000E+000.0000E+006.5770E+04-2.9146E+02

[0182] The longitudinal spherical aberration of FIG. 23 can be represented for light having a wavelength of, for example, approximately 656.3000 nm (nanometer), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, or approximately 435.8000 nm, respectively. The astigmatism of FIG. 24 can represent a result obtained for light having a wavelength of approximately 546.1000 nm. The distortion of FIG. 25 can also represent a result obtained for light having a wavelength of approximately 546.1000 nm. FIG. 26 is a diagram illustrating a camera module according to an embodiment of the present disclosure. FIG. 27 is a graph illustrating spherical aberration of the camera module according to the embodiment of FIG. 26. FIG. 28 is a graph illustrating astigmatism of the camera module according to the embodiment of FIG. 26. FIG. 29 is a graph illustrating distortion of the camera module according to the embodiment of FIG. 26.

[0183] Referring to FIGS. 26 to 29, the camera module (1000) may include four lens(es) (e.g., L1, L2, L3, L4), a filter (F), and an image sensor (IS). Here, the filter (F) may be an IR cut filter.

[0184] According to one embodiment, the camera module (1000) may include, in order from the closest to the subject side, a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4). Here, the first lens (L1) may have positive refractive power, the second lens (L2) may have positive refractive power, the third lens (L3) may have negative refractive power, and the fourth lens (L4) may have positive refractive power.

[0185] In the case where the camera module (1000) includes four lens(es) (e.g., L1, L2, L3, L4), 'L' of the above-mentioned [Formula 1] and [Formula 2] 1-3' may refer to the distance from the subject-side surface of the first lens (L1) arranged closest to the subject side to the image-side surface of the fourth lens (L4) arranged farthest from the subject side. In addition, 'BFL' of [Formula 3] may refer to the distance from the image-side surface of the fourth lens (L4) arranged farthest from the subject side to the image-forming surface.

[0186] [Table 11] below may describe various data regarding four lens(es) (e.g., L1, L2, L3, L4) and components (e.g., filter (F)) included in the camera module (1000). 'obj' may refer to an object, and 'img' may refer to an imaging surface of an image sensor (IS). 'S2 to S11' may refer to the surfaces of four lens(es) (e.g., L1, L2, L3, L4) and the filter (F). [Table 11] below may be data regarding a camera module (1000) having an F-number (F-no) of approximately 2.2, a half field of view (HFoV) of approximately 44.8 degrees, a focal length of approximately 0.804 mm, and an image sensor (IS) having an image height (IMG HT) of 0.838. The camera module (1000) may include four lenses (e.g., L1, L2, L3, L4) and components (e.g., filter (F)) having data of [Table 11], and may satisfy the above-described equation (and / or at least one of the above-described equations).

[0187] Lens surface (surface)Lens surface type (surface type)Radius of curvature (y radius)Thickness (Thickness)Refractive index (Nd)Abbe number (Vd)Focal length (EFL)objSphereInfinity400.0S1SphereInfinity0.010S2Asphere-12.3210.2311.53555.7521.032S3Asphere-0.5250.090S4Asphere-0.4410.2451.6349123.9671.679S5Asphere-0.374 0.039S6Asphere-0.2430.2481.53555.752-1.812S7Asphere-0.4410.020S8Asphere0.4490.2541.53555.7522.525S 9Asphere0.5460.142S10SphereInfinity0.1101.51679864.1983S11SphereInfinity0.520imgSphereInfinity0.000

[0188] The refractive index data of the above [Table 11] may represent the refractive index at a wavelength of, for example, 850.0000 nm. [Table 12] and [Table 13] below may describe the aspherical coefficients of four lenses (e.g., L1, L2, L3, L4) included in the camera module (1000).

[0189] Lens surfaceS2S3S4S5S6S7k9.9000E+01-1.6608E+013.4039E-01-2.1684E+00-2.93 24E+00-2.5041E+00A4-1.5495E+00-1.4597E+01-7.4800E-01-2.1243E+00-6.9946E+ 00-1.1684E+00A6-3.8813E+012.7409E+022.4786E+021.3777E+022.9345E+02-2.105 8E+01A81.6425E+03-5.4482E+03-2.4887E+04-2.6218E+03-5.4203E+033.6506E+02A 10 -6.0395E+045.6638E+041.3954E+062.7026E+045.8418E+04-4.1746E+03A12 1.0323E+06-2.6174E+05-4.9388E+07-1.6077E+05-2.6540E+053.6375E+04A 14 -7.4728E+06-5.1283E+041.0716E+093.9768E+05-1.0768E+06-2.2273E+05A 16 0.0000E+000.0000E+00-1.3779E+100.0000E+001.8750E+079.5262E+05A 18 0.0000E+000.0000E+009.5417E+100.0000E+00-8.2031E+07-2.5023E+06A 20 0.0000E+000.0000E+00-2.7092E+110.0000E+001.2483E+082.9203E+06

[0190] 렌즈면(surface)S8S9k-4.0051E+00-3.9788E+00A41.9955E+002.1288E+00A6-3.4494E+01-2.9807E+01A82.8386E+021.8132E+02A 10 -1.7198E+03-7.6983E+02A 12 7.3218E+032.2936E+03A 14 -2.0766E+04-4.6265E+03A 16 3.6823E+045.9119E+03A 18 -3.6550E+04-4.2488E+03A 20 1.5417E+041.2954E+03

[0191] The longitudinal spherical aberration of Fig. 27 can be represented for light having a wavelength of, for example, approximately 870.0000 nm (nanometer), approximately 860.0000 nm, approximately 850.0000 nm, approximately 840.0000 nm, or approximately 830.0000 nm, respectively. The astigmatism of Fig. 28 can represent the results obtained for light having a wavelength of approximately 850.0000 nm. The distortion of FIG. 29 can also represent the results obtained for light having a wavelength of approximately 850.0000 nm. In the above-described embodiments, in camera modules (e.g., 400, 500, 600, 700, 800, 900, 1000) and / or electronic devices including camera modules (e.g., 400, 500, 600, 700, 800, 900, 1000), various data on lenses and peripheral components can be confirmed. Such data can satisfy the above-described conditions, for example, the results of [Equations 1 to 5] as shown in [Table 14] below.

[0192] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Formula 10.9581.0221.1721.1731.5341.09 Formula 21.3911.3491.6341.4911.7841.061 Formula 31.0210.9300.9810.8950.8190.636 Formula 455.75255.92855.92855.92855.92855.752 Formula 51.6711.6711.6711.6711.6711.634

[0193] [Table 15] below can show the viewing angle conditions for each example.

[0194] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Angle 79.76078.44079.94079.62080.60089.4

[0195] In the above [Table 14] and [Table 15], 'Example 1' may refer to the camera module (500) illustrated in FIG. 6, 'Example 2' may refer to the camera module (600) illustrated in FIG. 10, 'Example 3' may refer to the camera module (700) illustrated in FIG. 14, 'Example 4' may refer to the camera module (800) illustrated in FIG. 18, and 'Example 5' may refer to the camera module (900) illustrated in FIG. 22. In addition, 'Example 6' may refer to the camera module (1000) illustrated in FIG. 26. The camera modules (e.g., 400, 500, 600, 700, 800, 900) according to the various embodiments described above may be mounted and used in electronic devices (e.g., optical devices). In addition to an image sensor (IS), an electronic device (e.g., an optical device) may further include an application processor (AP), and through the application processor (AP), a plurality of hardware or software components connected to the application processor (AP) may be controlled by, for example, running an operating system or an application program, and various data processing and calculations may be performed. For example, the application processor (AP) may further include a graphics processing unit (GPU) and / or an image signal processor. When the application processor (AP) includes an image signal processor, the image (or video) acquired by the image sensor (IS) may be stored or output using the application processor (AP).

[0196] 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.

[0197] 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, 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.

[0198] 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).

[0199] Various embodiments of the present disclosure may be implemented as software (e.g., a program (2140)) including one or more commands stored in a storage medium (e.g., an internal memory (2136) or an external memory (2138)) readable by a machine (e.g., an electronic device (2101)). For example, a processor (e.g., a processor (2120)) of the machine (e.g., an electronic device (2101)) 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.

[0200] 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.

[0201] According to various embodiments, 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 various 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.

[0202] According to one embodiment of the present disclosure, a camera module (400; 500; 600; 700; 800; 900, 1000) may include a lens assembly and an image sensor (420; IS) arranged to receive light focused or guided by the lens assembly. The lens assembly includes at least three lens(es) (L1; L2; L3) aligned along an optical axis direction from an object side to an image side, wherein a first lens (L1) arranged closest to the object side among the at least three lenses may have positive refractive power and have a concave object-side surface. The camera module may satisfy the following [Formula 1].

[0203] [Formula 1]

[0204]

[0205] (Here, 'L 1-3 ' is the distance from the subject side of the lens (L1) placed closest to the subject side to the image side of the lens (L3; L4) placed farthest from the subject side, 'f' is the focal length of the camera module, and 'BFL' is the distance from the image side of the lens (L3; L4) placed farthest from the subject side to the image plane.

[0206] According to one embodiment, when the lens assembly includes a first lens (L1), a second lens (L2), and a third lens (L3) in order from the subject side closer to the subject, the first lens may have positive refractive power, the second lens may have negative refractive power, and the third lens may have positive refractive power.

[0207] According to one embodiment, an aperture (sto) is disposed between the first lens and the subject, and the field of view (FOV) of the camera module may be 70 degrees or more and 90 degrees or less.

[0208] According to one embodiment, the camera module can satisfy the following [Equation 2].

[0209] [Formula 2]

[0210]

[0211] (Here, 'L 1-3 'IH' is the distance from the subject side of the lens (L1) placed closest to the subject side to the image side of the lens (L3; L4) placed farthest from the subject side, and 'IH' is the maximum height of the image plane.

[0212] According to one embodiment, the camera module can satisfy the following [Equation 3].

[0213] [Formula 3]

[0214]

[0215] (Here, 'BFL' is the distance from the image side of the lens (L3; L4) placed farthest from the subject side to the image plane, and 'f' is the focal length of the camera module.)

[0216] According to one embodiment, the camera module may include a first lens having an Abbe number satisfying the following [Equation 4].

[0217] [Formula 4]

[0218] 50≤Vd1≤60

[0219] (Here, ‘Vd1’ is the Abbe number of the first lens (L1).)

[0220] According to one embodiment, the first lens (L1) may have a meniscus shape in which both the subject-side surface (S2) and the image-side surface (S3) are concave toward the subject.

[0221] According to one embodiment, the second lens (L2) may have a meniscus shape in which both the subject-side surface (S4) and the image-side surface (S5) are concave toward the subject.

[0222] According to one embodiment, the second lens (L2) has a refractive index satisfying the following [Equation 5] and can be formed of a synthetic resin material.

[0223] [Formula 5]

[0224] 1.6≤nd2≤1.75

[0225] (Here, 'nd2' is the refractive index of the second lens (L2).)

[0226] According to one embodiment, the third lens (L3) may be a lens in which the subject-side surface (S6) is convex toward the subject and the image-side surface (S7) is convex toward the image.

[0227] According to one embodiment, the at least three lenses may be formed of a synthetic resin material.

[0228] According to one embodiment, the camera module may include a fixed focus type camera module.

[0229] According to one embodiment, it further comprises a filter (425; F), wherein the filter (425; F) may comprise an IR cut filter or a Band pass filter.

[0230] According to one embodiment, the image sensor may further include a cover glass (440; G) that at least partially surrounds the image sensor.

[0231] According to one embodiment, the image sensor (420; IS) may be provided by a CSP (chip scale package) method.

[0232] According to one embodiment of the present disclosure, an electronic device (101; 102; 104; 200; 300) may include a camera module (400; 500; 600; 700; 800; 900, 1000) including a lens assembly and an image sensor (420; IS) arranged to receive light focused or guided by the lens assembly, and a processor (120) configured to acquire an image of a subject using the camera module. The lens assembly includes at least three lens(es) (L1, L2, L3) aligned along an optical axis direction from an object side to an image side, and a first lens (L1) arranged closest to the object side among the at least three lenses may have positive refractive power and have a concave object-side surface. The electronic device may satisfy the following [Formula 1].

[0233] [Formula 1]

[0234]

[0235] Here, 'L 1-3' is the distance from the subject side of the lens (L1) placed closest to the subject side to the image side of the lens (L3; L4) placed farthest from the subject side, 'f' is the focal length of the camera module, and 'BFL' is the distance from the image side of the lens (L3; L4) placed farthest from the subject side to the image plane.

[0236] According to one embodiment, the electronic device may include a fixed focus type camera module.

[0237] According to one embodiment, the electronic device further comprises a filter (425; F), wherein the filter (425; F) may comprise an IR cut filter or a Band pass filter.

[0238] According to one embodiment, the electronic device may further include a cover glass that at least partially surrounds the image sensor (420; IS).

[0239] According to one embodiment, the image sensor may be provided by a chip scale package (CSP).

[0240] While the detailed description of various embodiments of the present disclosure has been given with reference to specific embodiments, it will be apparent to those skilled in the art that various modifications may be made without departing from the spirit and scope of the present disclosure. For example, in the specific embodiments of the present disclosure, the dimensions of at least three lens(es) may be appropriately set according to the structure and requirements of the lens assembly to be actually manufactured or the camera and / or electronic device to which such lens assembly will be mounted, the actual usage environment, etc.

[0241] 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 will be clearly understood by a person having ordinary knowledge in the technical field to which this document pertains.

[0242] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains.

Claims

1. In the camera module (400; 500; 600; 700; 800; 900; 1000), lens assembly; and An image sensor (420; IS) arranged to receive light focused or guided by the lens assembly is included. The above lens assembly includes at least three lens(es) (L1; L2; L3) aligned along an optical axis direction from an object side to an image side, wherein a first lens (L1) of the at least three lenses arranged closest to the object side has positive refractive power and has a concave object-side surface, A camera module satisfying the following [Formula 1]. [Formula 1] Here, 'L 1-3 ' is the distance from the subject-side surface of the lens (L1) positioned closest to the subject to the image side surface of the lens (L3; L4) positioned farthest from the subject, 'f' is the focal length of the camera module, and 'Bfl' is the distance from the image side surface of the lens (L3; L4) positioned farthest from the subject to the image plane.

2. In paragraph 1, When the above lens assembly includes a first lens (L1), a second lens (L2), and a third lens (L3) in order from the subject side, The above first lens has a defined refractive power, The above second lens has negative refractive power, The above third lens is a camera module having a defined refractive power.

3. In paragraph 1 or 2, A camera module in which an aperture (sto) is positioned between the first lens and the subject, and a field of view (FOV) of the camera module is 70 degrees or more and 90 degrees or less.

4. In any one of paragraphs 1 to 3, A camera module satisfying the following [Formula 2]. [Formula 2] Here, 'L 1-3 'IH' is the distance from the subject-side surface of the lens (L1) positioned closest to the subject to the image side surface of the lens (L3; L4) positioned farthest from the subject, and 'IH' is the maximum height of the image plane.

5. In any one of paragraphs 1 to 4, A camera module satisfying the following [Formula 3]. [Formula 3] Here, 'Bfl' is the distance from the image side of the lens (L3; L4) placed farthest from the subject side to the image plane, and 'f' is the focal length of the camera module.

6. In any one of paragraphs 1 to 5, The above first lens is a camera module whose Abbe number satisfies the following [Formula 4]. [Formula 4] 50≤Vd1≤60 Here, 'Vd1' is the Abbe number of the first lens (L1).

7. In any one of paragraphs 1 to 6, A camera module in which the above first lens (L1) is a meniscus-shaped lens in which both the subject-side surface (S2) and the image-side surface (S3) are concave toward the subject.

8. In any one of paragraphs 1 to 7, A camera module in which the second lens (L2) is a meniscus-shaped lens in which both the subject-side surface (S4) and the image-side surface (S5) are concave toward the subject.

9. In any one of paragraphs 1 to 8, The above second lens (L2) is a camera module formed of a synthetic resin material, the refractive index of which satisfies the following [Equation 5]. [Formula 5] 1.6≤nd2≤1.75 Here, 'nd2' is the refractive index of the second lens (L2).

10. In any one of paragraphs 1 to 9, A camera module in which the third lens (L3) is a lens in which the subject-side surface (S6) is convex toward the subject and the image-side surface (S7) is convex toward the image.

11. In any one of paragraphs 1 to 9, A camera module wherein at least three of the lenses are formed of a synthetic resin material.

12. In any one of paragraphs 1 to 11, A camera module including a fixed focus type camera module.

13. In any one of paragraphs 1 to 12, Including additional filter (425; F), The above filter (425; F) is a camera module including an IR cut filter or a band pass filter.

14. In any one of paragraphs 1 to 13, A camera module further comprising a cover glass (440; G) at least partially surrounding the image sensor.

15. In an electronic device (101; 102; 104; 200; 300) including a camera module according to any one of claims 1 to 14, An electronic device including a processor (120) set to acquire an image of a subject using the above camera module.

Images