Camera module including piezoelectric actuator

Abstract

A camera module according to an aspect of the disclosure includes a lens including an optical axis, a carrier configured to carry the lens in the direction along the optical axis, a piezoelectric actuator configured to drive the carrier, and a camera housing configured to accommodate the carrier and the piezoelectric actuator, wherein the piezoelectric actuator may include a motor configured to generate vibrations, a rod connected to the motor and configured to vibrate in the direction along the optical axis, a platform coupled to the carrier, a first ball disposed between the camera housing and the platform, and a first plate coupled to the platform and configured to press the rod and the first ball.

Description

Camera module including a piezoelectric actuator

[0001] The disclosure generally relates to a camera module, for example, to a camera module including a piezoelectric actuator.

[0002] Technology is being developed to adjust lens focus or implement image stabilization by moving a lens or image sensor in a specific direction.

[0003] The aforementioned related art is possessed or acquired during the process of deriving the present disclosure and cannot be considered prior art disclosed to the general public prior to the filing of the present disclosure.

[0004] A camera module may include a lens including an optical axis. The camera module may include a carrier configured to transport the lens in a direction along the optical axis. The camera module may include a piezoelectric actuator configured to drive the carrier. The camera module may include a camera housing configured to accommodate the carrier and the piezoelectric actuator. The piezoelectric actuator may include a motor configured to generate vibration. The piezoelectric actuator may include a rod connected to the motor and configured to vibrate in a direction along the optical axis. The piezoelectric actuator may include a platform coupled to the carrier. The piezoelectric actuator may include a first ball disposed between the camera housing and the platform. It may include a first plate coupled to the platform and configured to press the rod and the first ball.

[0005] A camera module may include a lens including an optical axis. The camera module may include a carrier configured to transport the lens in a direction along the optical axis. The carrier may include a guide hole. The camera module may include a piezoelectric actuator configured to drive the carrier. The camera module may include a camera housing configured to accommodate the carrier and the piezoelectric actuator. The camera module may include a guide shaft disposed in the guide hole. The piezoelectric actuator may include a motor configured to generate vibration. The piezoelectric actuator may include a rod connected to the motor and configured to vibrate in a direction along the optical axis. The piezoelectric actuator may include a platform coupled to the carrier. The piezoelectric actuator may include a first plate coupled to the platform and configured to press the rod and the guide shaft.

[0006] The electronic device may include the camera module.

[0007] The above-described and other aspects, features, and advantages of specific embodiments of the disclosure will become apparent from the following detailed description with reference to the accompanying drawings.

[0008] FIG. 1 is a block diagram of an electronic device in a network environment according to one embodiment.

[0009] FIG. 2 is a block diagram illustrating a camera module according to one embodiment.

[0010] FIG. 3 is a perspective view of a unidirectional electronic device according to one embodiment.

[0011] FIG. 4 is a perspective view of an electronic device in a different direction according to one embodiment.

[0012] FIG. 5 is a perspective view of a camera module according to one embodiment.

[0013] FIG. 6 is an exploded perspective view of a camera module according to one embodiment.

[0014] FIG. 7 is a perspective view of a piezoelectric actuator according to one embodiment.

[0015] FIG. 8 is a side view of a piezoelectric actuator according to one embodiment.

[0016] FIG. 9 is a plan view of a piezoelectric actuator according to one embodiment.

[0017] FIG. 10 is an exploded perspective view of a piezoelectric actuator according to one embodiment.

[0018] FIG. 11 is a plan view of a camera module according to one embodiment.

[0019] FIG. 12 is a cross-sectional view along line 12-12 of the camera module of FIG. 11 according to one embodiment.

[0020] FIG. 13 is a graph showing the operation signal of a piezoelectric actuator according to one embodiment.

[0021] FIG. 14 is an exploded perspective view of a camera module according to one embodiment.

[0022] FIG. 15 is a plan view of a camera module according to one embodiment.

[0023] FIG. 16 is a perspective view of a piezoelectric actuator according to one embodiment.

[0024] FIG. 17 is an exploded perspective view of a camera module according to one embodiment.

[0025] FIG. 18 is a schematic diagram showing a piezoelectric actuator according to one embodiment.

[0026] FIG. 19 is a schematic diagram showing a piezoelectric actuator according to one embodiment.

[0027] FIG. 1 is a block diagram of an electronic device in a network environment according to one embodiment.

[0028] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) through a first network (198) (e.g., a short-range wireless communication network) or with at least one of an electronic device (104) or a server (108) through a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) through a server (108). According to one embodiment, the electronic device (101) may include a processor (120), memory (130), input module (150), sound output module (155), display module (160), audio module (170), sensor module (176), interface (177), connection terminal (178), haptic module (179), camera module (180), power management module (188), battery (189), communication module (190), subscriber identification module (196), or antenna module (197). In some embodiments, at least one of these components (e.g., connection terminal (178)) may be omitted from the electronic device (101), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (176), camera module (180), or antenna module (197)) may be integrated into a single component (e.g., display module (160)).

[0029] The processor (120) can control at least one other component (e.g., hardware or software component) of the electronic device (101) connected to the processor (120) by executing software (e.g., program (140)), and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (120) can store commands or data received from other components (e.g., sensor module (176) or communication module (190)) in volatile memory (132), process the commands or data stored in volatile memory (132), and store the resulting data in non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., central processing unit or application processor) or an auxiliary processor (123) that can operate independently or together with it (e.g., graphics processing unit, neural processing unit (NPU), image signal processor, sensor hub processor, or communication processor). For example, if the electronic device (101) includes a main processor (121) and an auxiliary processor (123), the auxiliary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a designated function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as part thereof.

[0030] The auxiliary processor (123) may control at least some of the functions or states associated with at least one component of the electronic device (101) (e.g., display module (160), sensor module (176), or communication module (190)) on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. According to one embodiment, the auxiliary processor (123) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (180) or communication module (190)). According to one embodiment, the auxiliary processor (123) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or through a separate server (e.g., server (108)). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model may include a plurality of artificial neural network layers.An artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0031] The memory (130) can store various data used by at least one component of the electronic device (101) (e.g., processor (120) or sensor module (176)). The data may include, for example, input data or output data for software (e.g., program (140)) and related commands. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0032] The program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0033] The input module (150) can receive commands or data to be used for a component of the electronic device (101) (e.g., processor (120)) from outside the electronic device (101) (e.g., user). The input module (150) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0034] The sound output module (155) can output a sound signal to the outside of the electronic device (101). The sound output module (155) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0035] The display module (160) can visually provide information to an external (e.g., user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling said device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of the force generated by said touch.

[0036] The audio module (170) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150) or output sound through the sound output module (155) or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphones) connected directly or wirelessly to the electronic device (101).

[0037] The sensor module (176) can detect the operating state of the electronic device (101) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (176) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0038] The interface (177) may support one or more specified protocols that can be used for the electronic device (101) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (102)). According to one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0039] The connection terminal (178) may include a connector through which the electronic device (101) can be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0040] The haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (179) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0041] The camera module (180) can capture still images and video. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0042] 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, for example, as at least part of a power management integrated circuit (PMIC).

[0043] The battery (189) can supply power to at least one component of the electronic device (101). According to one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0044] The communication module (190) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may include one or more communication processors that operate independently of the processor (120) (e.g., application processor) and support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., cellular communication module, short-range wireless communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (104) through a first network (198) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (199) (e.g., a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (196).

[0045] The wireless communication module (192) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The wireless communication module (192) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (192) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), full-dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large-scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), external electronic device (e.g., electronic device (104)), or network system (e.g., second network (199)). According to one embodiment, the wireless communication module (192) can support a Peak data rate (e.g., 20 Gbps or more) for eMBB realization, loss coverage (e.g., 164 dB or less) for mMTC realization, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for URLLC realization.

[0046] An antenna module (197) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module (197) may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as a first network (198) or a second network (199), may be selected from the plurality of antennas, for example, by a communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (197).

[0047] According to one embodiment, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0048] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0049] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) through a server (108) connected to a second network (199). Each of the external electronic devices (102, or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations performed on the electronic device (101) may be performed on one or more of the external electronic devices (102, 104, or 108). For example, if the electronic device (101) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (101) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (101) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In one embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (104) or the server (108) may be included within a 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.

[0050] The electronic device according to the embodiments disclosed in this document may be of various forms. The electronic device may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a consumer electronics device. The electronic device according to the embodiments of this document is not limited to the aforementioned devices.

[0051] The embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of said items unless the relevant context clearly indicates otherwise. In this document, each of phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as “first,” “second,” or “first” or “second” may be used simply to distinguish a component from another component and do not limit the components in any other aspect (e.g., importance or order). Where any (e.g., first) component is referred to as “coupled” or “connected” to another (e.g., second) component, with or without the terms “functionally” or “communicationally,” it means that said component may be connected to said other component directly (e.g., wired), wirelessly, or through a third component.

[0052] The term "module" as used in the embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0053] Embodiments of the present document may be implemented as software (e.g., program (140)) comprising one or more instructions stored in a storage medium (e.g., internal memory (136) or external memory (138)) readable by a machine (e.g., electronic device (101)). For example, a processor (e.g., processor (120)) of the machine (e.g., electronic device (101)) may call at least one of the one or more instructions stored in the storage medium and execute it. This enables the machine to be operated to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily.

[0054] According to one embodiment, the method according to the embodiments disclosed herein may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0055] According to embodiments, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to embodiments, one or more of the components or operations among the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to embodiments, operations performed by the module, program, or other components may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0056] FIG. 2 is a block diagram illustrating a camera module according to one embodiment.

[0057] Referring to FIG. 2, the camera module (180) may include a lens assembly (210), a flash (220), an image sensor (230), an image stabilizer (240), a memory (250) (e.g., a buffer memory), or an image signal processor (260). The lens assembly (210) may collect light emitted from a subject that is the target of image capture. The lens assembly (210) may include one or more lenses. According to one embodiment, the camera module (180) may include a plurality of lens assemblies (210). In this case, the camera module (180) may form, for example, a dual camera, a 360-degree camera, or a spherical camera. Some of the plurality of lens assemblies (210) may have the same lens properties (e.g., angle of view, focal length, autofocus, f-number, or optical zoom), or at least one lens assembly may have one or more lens properties different from the lens properties of other lens assemblies. The lens assemblies (210) may include, for example, a wide-angle lens or a telephoto lens.

[0058] A flash (220) may emit light used to enhance light emitted or reflected from a subject. According to one embodiment, the flash (220) may include one or more light-emitting diodes (e.g., RGB (red-green-blue) LED, white LED, infrared LED, or ultraviolet LED), or a xenon lamp. An image sensor (230) may acquire an image corresponding to the subject by converting light emitted or reflected from the subject and transmitted through a lens assembly (210) into an electrical signal. According to one embodiment, the image sensor (230) may include, for example, one image sensor selected from image sensors with different properties such as an RGB sensor, a BW (black and white) sensor, an IR sensor, or a UV sensor, a plurality of image sensors having the same properties, or a plurality of image sensors having different properties. Each image sensor included in the image sensor (230) can be implemented using, for example, a CCD (charged coupled device) sensor or a CMOS (complementary metal oxide semiconductor) sensor.

[0059] The image stabilizer (240) may move at least one lens or image sensor (230) included in the lens assembly (210) in a specific direction or control the operational characteristics of the image sensor (230) (e.g., adjusting read-out timing) in response to the movement of the camera module (180) or the electronic device (101) containing it. This allows for compensating for at least some of the negative effects caused by the movement on the image being captured. According to one embodiment, the image stabilizer (240) may detect such movement of the camera module (180) or the electronic device (101) using a gyroscope sensor (not shown) or an accelerometer sensor (not shown) placed inside or outside the camera module (180). According to one embodiment, the image stabilizer (240) may be implemented, for example, as an optical image stabilizer. The memory (250) may temporarily store at least a portion of the image acquired through the image sensor (230) for the next image processing operation. For example, if image acquisition by the shutter is delayed or multiple images are acquired at high speed, the acquired original image (e.g., a Bayer-patterned image or a high-resolution image) is stored in the memory (250), and the corresponding copy image (e.g., a low-resolution image) can be previewed through the display module (160). Subsequently, when a specified condition is satisfied (e.g., user input or system command), at least a portion of the original image stored in the memory (250) may be acquired and processed by, for example, an image signal processor (260). According to one embodiment, the memory (250) may be configured as at least a portion of the memory (130) or as a separate memory that operates independently thereof.

[0060] The image signal processor (260) can perform one or more image processing operations on an image obtained through the image sensor (230) or an image stored in memory (250). The above one or more image processing methods may include, for example, depth map generation, 3D modeling, panorama generation, feature point extraction, image synthesis, or image compensation (e.g., noise reduction, resolution adjustment, brightness adjustment, blurring, sharpening, or softing). Additionally or generally, the image signal processor (260) may perform control (e.g., exposure time control, or readout timing control, etc.) over at least one of the components included in the camera module (180) (e.g., image sensor (230)). The image processed by the image signal processor (260) may be stored back in memory (250) for further processing or provided to an external component of the camera module (180) (e.g., memory (130), display module (160), electronic device (102), electronic device (104), or server (108)). According to one embodiment, the image signal processor (260) is at least part of the processor (120). It may be configured as a separate processor that operates independently of the processor (120). If the image signal processor (260) is configured as a separate processor from the processor (120), at least one image processed by the image signal processor (260) may be displayed through the display module (160) as is or after additional image processing by the processor (120).

[0061] According to one embodiment, the electronic device (101) may include a plurality of camera modules (180) each having different attributes or functions. In this case, for example, at least one of the plurality of camera modules (180) may be a wide-angle camera and at least another may be a telephoto camera. Similarly, at least one of the plurality of camera modules (180) may be a front camera and at least another may be a rear camera.

[0062] FIG. 3 is a perspective view of an electronic device in one direction according to one embodiment. FIG. 4 is a perspective view of an electronic device in another direction according to one embodiment.

[0063] Referring to FIGS. 3 and 4, an electronic device (301) (e.g., the electronic device (101) of FIG. 1 and / or the electronic device (101) of FIG. 2) may comprise a housing (310) having a first surface (310A) (e.g., front), a second surface (310B) (e.g., rear), and a third surface (310C) (e.g., side) surrounding the space between the first surface (310A) and the second surface (310B). The first surface (310A) may be formed by a first plate (311A) which is at least partially transparent. For example, the first plate (311A) may comprise a glass plate or a polymer plate comprising at least one coating layer. The second surface (310B) may be formed by a second plate (311B) which is substantially opaque. For example, the second plate (311B) may be formed by coated or colored glass, ceramic, polymer, metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination thereof. The third surface (310C) may be formed by a frame (311C) comprising metal and / or polymer that is combined with the first plate (311A) and the second plate (311B). The second plate (311B) and the frame (311C) may be formed monolithically. The second plate (311B) and the frame (311C) may be formed of substantially the same material (e.g., aluminum).

[0064] The electronic device (301) may include an input module (350) (e.g., the input module (150) of FIG. 1). The input module (350) may be placed on a third surface (310C). The input module (350) may include at least one key input device. For example, the key input device may include one or more mechanical actuators (e.g., buttons), one or more capacitors, and / or one or more inductors.

[0065] The electronic device (301) may include an acoustic output module (355) (e.g., the acoustic output module (155) of FIG. 1). The acoustic output module (355) may be placed on a third surface (310C). The acoustic output module (355) may include one or more holes.

[0066] The electronic device (301) may include a display module (361) (e.g., the display module (160) of FIG. 1). The display module (361) may be placed on a first surface (310A). The display module (361) may be visible through at least a portion of the first plate (311A). The display module (361) may have a shape substantially identical to the shape of the outer edge of the first plate (311A). The edge of the display module (361) may substantially match the outer edge of the first plate (311A). The display module (361) may include a touch detection circuit, a pressure sensor capable of measuring the intensity (pressure) of the touch, and / or a digitizer for detecting a magnetic field-type stylus pen. The display module (361) may include a screen display area (361A) that is visually exposed and displays content through pixels. The screen display area (361A) may include a sensing area (361A-1). The sensing area (361A-1) may overlap with at least a portion of the screen display area (361A). The sensing area (361A-1) may allow the transmission of an input signal associated with a sensor module (376) (e.g., sensor module (176) of FIG. 1). The sensing area (361A-1) may display content, just like the screen display area (361A) that does not overlap with the sensing area (361A-1). For example, the sensing area (361A-1) may display content while the sensor module (376) is not operating. At least a portion of the camera area (361A-2) may overlap with the screen display area (361A). The screen display area (361A) may include the camera area (361A-2). The camera area (361A-2) may allow the transmission of an optical signal associated with the first camera module (380A) (e.g., the camera module (180) of FIG. 1 and / or the camera module (180) of FIG. 2). The camera area (361A-2) may also be referred to as a "display hole".The camera area (361A-2) may substantially have a circular or elliptical shape. In one embodiment not illustrated, the display module (361) may include at least one or a combination of an audio module (370), a sensor module (376), a first camera module (380A), or a light-emitting element (not illustrated) on the back surface (e.g., the +Z direction surface) of the screen display area (361A). For example, the electronic device (301) may have a camera module (e.g., the first camera module (380A)) positioned on the back surface of at least one of the first surface (310A) (e.g., the front surface) or the third surface (310C) (e.g., the side surface) so as to face the first surface (310A) and / or the third surface (310C). For example, the first camera module (380A) may not be visually exposed to the screen display area (361A) and may include an under display camera (UDC) which may also be referred to as an "under panel camera."

[0067] The electronic device (301) may include an audio module (370) (e.g., the audio module (170) of FIG. 1). The audio module (370) may be placed on a third side (310C). The audio module (370) may acquire sound through at least one hole.

[0068] The electronic device (301) may include a sensor module (376). The sensor module (376) may be placed on a first surface (310A). The sensor module (376) may form a sensing area (361A-1) in at least a portion of the screen display area (361A). The sensor module (376) may receive an input signal passing through the sensing area (361A-1) and generate an electrical signal based on the received input signal. For example, the input signal may have a specified physical quantity (e.g., heat, light, temperature, sound, pressure, ultrasound). The input signal may include a signal related to the user's biometric information (e.g., fingerprint).

[0069] The electronic device (301) may include a connection terminal (378) (e.g., the connection terminal (178) of FIG. 1). The connection terminal (378) may be positioned on a third surface (310C). For example, when viewing the electronic device (301) in one direction (e.g., the Y-axis direction), the connection terminal (378) may be located in the substantially central part of the third surface (310C), and the sound output module (355) may be positioned on one side (e.g., the right side) relative to the connection terminal (378).

[0070] The electronic device (301) may include a first camera module (380A) (e.g., the camera module (180) of FIG. 1 and / or the camera module (180) of FIG. 2). The first camera module (380A) may be placed on a first surface (310A). At least a portion of the first camera module (380A) may be placed below the display module (361). The first camera module (380A) may receive an optical signal passing through a camera area (361A-2).

[0071] The electronic device (301) may include a plurality of second camera modules (380B) (e.g., the camera module (180) of FIG. 1 and / or the camera module (180) of FIG. 2). A plurality of second camera modules (380B) may be placed on a second surface (310B). A plurality of second camera modules (380B) may be arranged in a first row in one direction (e.g., the Y-axis direction) of the second plate (311B). A plurality of second camera modules (380B) may have different fields of view. For example, a plurality of second camera modules (380B) may include an ultra-wide-angle camera, a wide-angle camera, and / or a telephoto camera.

[0072] The electronic device (301) may include a light module (380C) (e.g., the flash (220) of FIG. 2). The light module (380C) may be arranged in a second row substantially parallel to the first row of a plurality of second camera modules (380B) on the second surface (310B). The light module (380C) may include one or more light-emitting diodes or xenon lamps. The light module (380C) may include a sensor configured to detect external light. For example, the sensor may include a flicker sensor.

[0073] The electronic device (301) may include a third camera module (380D). The pixels, magnification, and / or field of view of the third camera module (380D) may differ from the pixels, magnification, and / or field of view of at least one second camera module (380B). The third camera module (380D) may be arranged in a second row substantially parallel to a first row of multiple second camera modules (380B) on a second surface (310B).

[0074] The electronic device (301) may include a fourth camera module (380E). The fourth camera module (380E), which may also be referred to as a "depth camera" or a "Time-of-Flight (ToF) camera," may be configured to measure the distance between the fourth camera module (380E) and a subject. For example, the fourth camera module (380E) may be configured to measure the distance using at least one of ultrasound, infrared, or laser, or a combination thereof. The fourth camera module (380E) may be arranged in a second row substantially parallel to a first row of a plurality of second camera modules (380B) on a second surface (310B).

[0075] Meanwhile, the embodiments disclosed in this document may be applied to electronic devices of various shapes and forms (e.g., foldable electronic devices, slideable electronic devices, rollable electronic devices, digital cameras, digital video cameras, tablets, notebook-shaped electronic devices, and other electronic devices) in addition to the electronic devices shown in FIGS. 3 and 4.

[0076] In this document, terms such as “substantially,” “approximately,” “generally,” and “about” used to refer to a given parameter, attribute, or condition may include the extent to which a person skilled in the art can understand that the given parameter, attribute, or condition is satisfied with a small degree of variance, such as within acceptable manufacturing tolerances. For example, any specific parameter that is substantially satisfied may be satisfied by at least 90%, at least 95%, or at least 99%.

[0077] FIG. 5 is a perspective view of a camera module according to one embodiment. FIG. 6 is an exploded perspective view of a camera module according to one embodiment. FIG. 7 is a perspective view of a piezoelectric actuator according to one embodiment. FIG. 8 is a side view of a piezoelectric actuator according to one embodiment. FIG. 9 is a top view of a piezoelectric actuator according to one embodiment. FIG. 10 is an exploded perspective view of a piezoelectric actuator according to one embodiment. FIG. 11 is a top view of a camera module according to one embodiment. FIG. 12 is a cross-sectional view along line 12-12 of the camera module of FIG. 11 according to one embodiment. FIG. 13 are graphs showing the operation signals of a piezoelectric actuator according to one embodiment.

[0078] Referring to FIGS. 5 through 13, a camera module (400) (e.g., camera module (180) of FIG. 1, camera module (180) of FIG. 2, first camera module (380A) of FIG. 3 and / or second camera module (380B) of FIG. 4) may include a lens assembly (410) (e.g., lens assembly (210) of FIG. 2). The lens assembly (410) may include at least one lens (411) having an optical axis (A). A portion of the optical axis (A) may be defined as a line connecting the center of curvature of a first surface of at least one lens (411) and the center of curvature of a Nth surface (where N is a natural number). The lens assembly (410) may include a lens housing (412) configured to accommodate at least one lens (411). The lens housing (412) may also be referred to as a "lens barrel" or a "lens holder."

[0079] The camera module (400) may include a camera housing (420) configured to accommodate one or more camera-related components. The camera housing (420) may include a base frame (421) and a cover frame (422) configured to cover the base frame (421).

[0080] The camera module (400) may include a carrier (435) configured to carry at least one lens (411) in a direction along the optical axis (A) (e.g., Z-axis direction). The carrier (435) may accommodate and carry a lens housing (412), but is not limited thereto, may accommodate and carry at least one lens (411) without a lens housing (412), or may carry at least one lens (411) integrally with a lens housing (412).

[0081] The camera module (400) may include a piezoelectric actuator (440) configured to drive a carrier (435). The piezoelectric actuator (440) may move at least one lens (411) in a direction along the optical axis (A) (e.g., Z-axis direction) relative to an image sensor (e.g., image sensor (230) of FIG. 2).

[0082] The piezoelectric actuator (440) can be coupled to the carrier (435) as a separate component. The piezoelectric actuator (440) may also form an integrated component with the carrier (435).

[0083] The piezoelectric actuator (440) may include a motor (441). The motor (441) may be a piezoelectric motor configured to generate vibrations. The motor (441) may include multilayer type piezoelectric elements operating at a reduced driving voltage (e.g., about 3 V to about 5 V). The piezoelectric elements of the motor (441) may generate axial vibrations in the d33 mode. A first end of the motor (441) may be placed on the base frame (421) as a fixed end, and a second end opposite to the first end of the motor (441) may be a free end to which a rod (442) is connected. The natural frequency generating axial vibrations in the d33 mode may be matched with the frequency of the driving voltage applied to the piezoelectric elements.

[0084] The piezoelectric actuator (440) may include a rod (442). The rod (442) may be connected to a motor (441). For example, the end of the rod (442) may be connected to the motor (441) through bonding (443). The rod (442) may be configured to vibrate in an axial direction (e.g., along the optical axis (A)). The rod (442) may transmit amplified axial vibrations of the d33 mode generated from the amplification structure of the motor (441) to the platform (445) through the first plate (450) and the second plate (451). The rod (442) may guide axial movement of the platform (445) (e.g., movement along the Z-axis).

[0085] The piezoelectric actuator (440) may include a platform (445). The platform (445) may move in a direction substantially parallel to the axial direction of the rod (442) (e.g., Z-axis direction) while the rod (442) vibrates in the axial direction (e.g., Z-axis direction). By moving in the said direction, the platform (445) coupled to the carrier (435) may enable an autofocus stroke, which is a movement in the direction (e.g., Z-axis direction) along the optical axis (A) of at least one lens (411) by the carrier (435).

[0086] The piezoelectric actuator (440) may include at least one first ball (B1), at least one second ball (B2), and a plurality of third balls (B3) to reduce friction between the base frame (421) and the platform (445). At least one first ball (B1) may be placed between the platform (445) and the base frame (421) in a first peripheral area (e.g., a peripheral area in the +Y direction) of the platform (445). At least one first ball (B1) may be placed in a planar groove in the first peripheral area of ​​the platform (445). At least one second ball (B2) may be placed between the platform (445) and the base frame (421) in a second peripheral area (e.g., a peripheral area in the -Y direction) opposite to the first peripheral area of ​​the platform (445). At least one second ball (B2) may be placed in a planar groove in the second peripheral area of ​​the platform (445). A first set of third balls (B3) may be placed between the platform (445) and the base frame (421) opposite to at least one first ball (B1) in the first peripheral area of ​​the platform (445). A first set of third balls (B3) may be placed in a V-shaped groove in the first peripheral area of ​​the platform (445). A second set of third balls (B3) may be placed between the platform (445) and the base frame (421) opposite to at least one second ball (B2) in the second peripheral area of ​​the platform (445). A second set of third balls (B3) may be placed in a V-shaped groove in the second peripheral area of ​​the platform (445). At least one first ball (B1) and at least one second ball (B2) can guide the platform (445) by rolling in the height direction (e.g., Z-axis direction) of the base frame (421) while in close contact with the base frame (421) when pressed. Multiple third balls (B3) can guide the linear movement of the platform (445) by rolling along the V-shaped groove.At least one first ball (B1) and at least one second ball (B2) located in both peripheral regions relative to the rod (442) can distribute the load of the lens (411) together with a plurality of third balls (B3) when pressurized, increase the mechanical stability of the piezoelectric actuator (440), and reduce the rotation or pivot of at least one lens (411) around the drive axis of the motor (441).

[0087] The piezoelectric actuator (440) may include a first plate (450). The first plate (450) may be configured to press a rod (442) and at least one first ball (B1). The first plate (450) may include a first fixed part (450A) fixed (e.g., bonded) to a platform (445), a first elastic part (450B) that is elastically deformed with respect to the first fixed part (450A) and contacts the rod (442) at one point, and a second elastic part (450C) positioned opposite to the first elastic part (450B), that is elastically deformed with respect to the first fixed part (450A), and contacts at least one first ball (B1). For example, the second elastic member (450C) includes a first region having a first width and a second region having a second width greater than the first width, and the second region may contact at least one first ball (B1). The first plate (450) may simultaneously apply pre-tension to the rod (442) and at least one first ball (B1). The first fixed member (450A) may be positioned between the carrier (435) and the platform (445) in a first peripheral region of the platform (445) (e.g., a peripheral region in the +Y direction). The first elastic member (450B) may be positioned between the carrier (435) and the rod (442) in a central region of the platform (445). The second elastic member (450C) may be positioned between at least one first ball (B1) and the platform (445) in the first peripheral area (e.g., the peripheral area in the +Y direction) of the platform (445).

[0088] The piezoelectric actuator (440) may include a second plate (451). The second plate (451) may be configured to press against the rod (442). The second plate (451) may be placed on the platform (445) by insert molding. The second plate (451) may include a first portion (451A) positioned substantially parallel to the first fixed portion (450A), and a second portion (451B) connected to the first portion (451A) and surrounding a side surface of the rod (442) (e.g., a circumferential surface substantially orthogonal to the Z-axis). The first portion (451A) may extend between a first peripheral area (e.g., a +Y direction peripheral area) and a second peripheral area (e.g., a -Y direction peripheral area) of the platform (445). The second part (451B) can come into contact with the rod (442) at least two points.

[0089] The mechanical restraint between the rod (442) and the first plate (450) and the mechanical restraint between the rod (442) and the second plate (451) can reduce the shaking of the image generated through at least one lens (411).

[0090] The piezoelectric actuator (440) may include a third plate (452). The third plate (452) may be configured to press at least one second ball (B2). The third plate (452) may include a second fixed part (452A) that is fixed (e.g., bonded) to the platform (445), and a third elastic part (452B) that is elastically deformed with respect to the second fixed part (452A) and contacts at least one second ball (B2). For example, the third elastic part (452B) may include a third region having a third width and a fourth region having a fourth width greater than the third width, and the fourth region may contact at least one second ball (B2). The third plate (452) may apply a preload to at least one second ball (B2). The second fixed part (452A) may be positioned between the carrier (435) and the platform (445) in the central area of ​​the platform (445). The third elastic part (452B) may be positioned between at least one second ball (B2) and the platform (445) in the second peripheral area (e.g., -Y direction peripheral area) of the platform (445).

[0091] The first plate (450), the second plate (451), and the second plate (452) may each include at least partially a metal material.

[0092] The pressure applied to the rod (442) can be determined by the gap between the first plate (450) and the second plate (451). For example, as the gap between the first plate (450) and the second plate (451) narrows, the pressure applied to the rod (442) increases; thus, the increased frictional force between the rod (442) and the first plate (450), and the increased frictional force between the rod (442) and the second plate (451), can increase the driving force of the piezoelectric actuator (440). The pressure applied to at least one first ball (B1), at least one second ball (B2), and / or a plurality of third balls (B3) can be determined by the diameter of the first ball (B1), the diameter of the second ball (B2), and / or the diameter of the third ball (B3). Even when the diameter of the first ball (B1), the diameter of the second ball (B2), and / or the diameter of the third ball (B3) are adjusted after first adjusting the pressure applied to the rod (442), no change in the center position of at least one lens (411) occurs, so the possibility of design changes to camera-related components during manufacturing can be reduced.

[0093] A motor (441), a rod (442), a platform (445), a first plate (450), a second plate (451), a third plate (452), a plurality of first balls (B1), a plurality of second balls (B2), and a plurality of third balls (B3) can form a sub-assembly coupled to a carrier (435). The sub-assembly can reduce the risk of image degradation caused by tilt that may occur due to friction between mechanical components and ensure constant actuator performance and noise quality during manufacturing.

[0094] While the first plate (450) mechanically presses the rod (442) and at least one first ball (B1) and is in contact with them, a pulse width modulation (PWM) signal having a specific duty ratio of a waveform as shown in FIG. 13 can be applied to the motor (441). The motor (441) can generate stick-slip type vibration displacement corresponding to the signal. A sub-assembly having a self-preloading structure can move in a direction along the optical axis (A) (e.g., Z-axis direction) while maintaining frictional force between the platform (445) and the base frame (421), and a carrier (435) to which the sub-assembly is attached can also move in a direction along the optical axis (A). For example, static friction force acts between the rod (442) and one or more plates (450, 451) in a stick section where deformation of the rod (442) occurs in the first direction (e.g., +Z direction), and kinetic friction force acts between the rod (442) and one or more plates (450, 451) in a slip section where restoration of the rod (442) occurs, and the platform (445) combined with one or more plates (450, 451) and the carrier (435) combined therewith can advance in the forward direction (e.g., +Z direction). Likewise, static friction force acts between the rod (442) and one or more plates (450, 451) in a stick section where deformation occurs in a second direction (e.g., -Z direction) opposite to the first direction of the rod (442), and kinetic friction force acts between the rod (442) and one or more plates (450, 451) in a slip section where restoration of the rod (442) occurs, so that the platform (445) to which one or more plates (450, 451) are coupled and the carrier (435) coupled thereto can retract in a retracting direction (e.g., -Z direction). Meanwhile, the waveform shown in FIG. 13 is not limited to a waveform having a pulse width modulation signal and can be implemented as various waveforms such as a triangular wave or a sine wave.

[0095] In an unillustrated embodiment, the self-preloading structure may be implemented by a magnetic coupling structure (e.g., a magnet and a plate made of metal material) in addition to a structure using elastic deformation of the first plate (450), the second plate (451) and the third plate (452).

[0096] FIG. 14 is an exploded perspective view of a camera module according to one embodiment. FIG. 15 is a plan view of a camera module according to one embodiment.

[0097] Referring to FIGS. 14 and 15, a camera module (400-1) (e.g., camera module (180) of FIG. 1, camera module (180) of FIG. 2, first camera module (380A) of FIG. 3, second camera module (380B) of FIG. 4 and / or camera module (400) of FIGS. 5 to 13) may include a carrier (435-1) (e.g., carrier (435) of FIGS. 5 to 13) and a piezoelectric actuator (440-1) (e.g., piezoelectric actuator (440) of FIGS. 5 to 13).

[0098] A piezoelectric actuator (440-1) may include a motor (441), a rod (442), a platform (445), a first plate (450), a second plate (451), and a third plate (452). The first plate (450) may include a first fixed part (450A), a first elastic part (450B), and a second elastic part (450C). The second plate (451) may include a first part (451A) and a second part (451B). The third plate (452) may include a second fixed part (452A) and a third elastic part (452B). The piezoelectric actuator (440-1) may not include a ball (e.g., the first ball (B1), the second ball (B2), and the third ball (B3) of FIGS. 5 to 13).

[0099] The camera module (400-1) may include a plurality of guide shafts (460). The plurality of guide shafts (460) may be configured to guide a piezoelectric actuator (440-1) in a direction along the optical axis (e.g., the optical axis (A) in FIGS. 5 to 13) with respect to a camera housing (e.g., the camera housing (420) in FIGS. 5 to 13) (e.g., the Z-axis direction). Any one of the plurality of guide shafts (460) may be placed in a first peripheral area (e.g., a peripheral area in the +Y direction) of the platform (445), be pressed by a second elastic member (450C), and come into contact with the second elastic member (450C). One of the multiple guide shafts (460) is positioned in a second peripheral area (e.g., -Y direction peripheral area) of the platform (445) and is pressed by a third elastic member (452B) and can come into contact with the third elastic member (452B).

[0100] The camera module (400-1) may include a guide mount (461). Multiple guide shafts (460) may be coupled to the guide mount (461). The guide mount (461) may allow the multiple guide shafts (460) to be positioned at predetermined locations in the camera housing (e.g., the camera housing (420) of FIGS. 5 to 13). The guide mount (461) may be positioned in the camera housing as a separate component from the piezoelectric actuator (440-1).

[0101] When a driving force is generated in the direction along the optical axis from the piezoelectric actuator (440-1), the carrier (435-1) coupled to the piezoelectric actuator (440-1) can be guided along the axial direction of the guide shaft (460) passing through the guide hole (436) of the carrier (435-1).

[0102] FIG. 16 is a perspective view of a piezoelectric actuator according to one embodiment.

[0103] Referring to FIG. 16, a piezoelectric actuator (440-2) (e.g., the piezoelectric actuator (440) of FIG. 5 through 13 and / or the piezoelectric actuator (440-1) of FIG. 14 and 15) may comprise a motor (441-2) (e.g., the motor (441) of FIG. 5 through 13 and / or the motor (441) of FIG. 14 and 15), a rod (442), and a bonding (443). The motor (441-2) may be configured to generate vibrations that are displaced in a direction substantially orthogonal to the vibration direction of the rod (442) (e.g., the Z-axis direction) (e.g., the XY plane direction).

[0104] FIG. 17 is an exploded perspective view of a camera module according to one embodiment.

[0105] Referring to FIG. 17, a camera module (400-3) (e.g., camera module (180) of FIG. 1, camera module (180) of FIG. 2, first camera module (380A) of FIG. 3, second camera module (380B) of FIG. 4, camera module (400) of FIG. 5 to 13 and / or camera module (400-1) of FIG. 14 and 15) may include a carrier (435), and a piezoelectric actuator (440-3) (e.g., piezoelectric actuator (440) of FIG. 5 to 13, piezoelectric actuator (440-1) of FIG. 14 and 15 and / or piezoelectric actuator (440-2) of FIG. 16). The piezoelectric actuator (440-3) may include a motor (441), a rod (442), a platform (445-3) (e.g., the platform (445) of FIGS. 5 to 13 and / or the platform (445) of FIGS. 14 and 15), a first plate (450-3) (e.g., the first plate (450) of FIGS. 5 to 13 and / or the first plate (450) of FIGS. 14 and 15), a second plate (451-3) (e.g., the second plate (451) of FIGS. 5 to 13 and / or the second plate (451) of FIGS. 14 and 15), and at least one ball (B) (e.g., the first ball (B1), the second ball (B2) and / or the third ball (B3) of FIGS. 5 to 13).

[0106] The first plate (450-3) may include a first fixed part (450A-3) (e.g., the first fixed part (450A) of FIGS. 5 to 13 and / or the first fixed part (450A) of FIGS. 14 and 15), and a first elastic part (450B-3) (e.g., the second elastic part (450B) of FIGS. 5 to 13 and / or the second elastic part (450B) of FIGS. 14 and 15).

[0107] The second plate (451-3) may include a first part (451A-3) (e.g., the first part (451A) of FIGS. 5 to 13 and / or the first part (451A) of FIGS. 14 and 15), and a second part (451B-3) (e.g., the second part (451B) of FIGS. 5 to 13 and / or the second part (451B) of FIGS. 14 and 15).

[0108] The motor (441) and the rod (442) are positioned in a first peripheral area (e.g., a peripheral area in the +Y direction) of the platform (445), and at least one ball (B) may be positioned in a second peripheral area (e.g., a peripheral area in the -Y direction) of the platform (445). A first fixed part (450A-3) may be positioned in a central area of ​​the platform (445). A first fixed part (450A-3) may be positioned on a side surface (e.g., a side surface in the -X direction) of the platform (445) facing the carrier (435). A first elastic part (450B-3) may be positioned in a first peripheral area (e.g., a peripheral area in the +Y direction) of the platform (445). A first part (451A-3) may be positioned in a central area of ​​the platform (445). The second part (451B-3) can be placed in the first peripheral area of ​​the platform (445) (e.g., the peripheral area in the +Y direction).

[0109] In an embodiment not illustrated, the camera module (400-3) includes a guide shaft (e.g., the guide shaft (460) of FIG. 14 and FIG. 15), and the piezoelectric actuator (440-3) may not include a ball (B). The first plate (450-3) may be configured to press the guide shaft.

[0110] FIG. 18 is a schematic diagram showing a piezoelectric actuator according to one embodiment.

[0111] Referring to FIG. 18, a piezoelectric actuator (440-4) (e.g., piezoelectric actuator (440) of FIG. 5 through 13, piezoelectric actuator (440-1) of FIG. 14 and 15, piezoelectric actuator (440-2) of FIG. 16 and / or piezoelectric actuator (440-3) of FIG. 17) comprises a rod (442), a plate (450-4) (e.g., first plate (450) of FIG. 5 through 13, first plate (450) of FIG. 14 and 15 and / or first plate (450-3) of FIG. 17), and a ball (B) (e.g., first ball (B1) of FIG. 5 through 13, second ball (B2) and / or third ball (B3) of FIG. 17). It can be included.

[0112] The plate (450-4) comprises a fixed portion (450A-4) (e.g., the first fixed portion (450A) of FIGS. 5 to 13, the first fixed portion (450A) of FIGS. 14 and 15 and / or the first fixed portion (450A-3) of FIG. 17), a first elastic portion (450B-4) (e.g., the first elastic portion (450B) of FIGS. 5 to 13, the first elastic portion (450B) of FIGS. 14 and 15 and / or the first elastic portion (450B-3) of FIG. 17), and a second elastic portion (450C-4) (e.g., the second elastic portion (450C) of FIGS. 5 to 13, the second elastic portion (450C) of FIGS. 14 and 15 and / or the second elastic portion (450C-3) of FIG. 17). It can be included.

[0113] The first elastic part (450B-4) contacts the rod (442) at least three points and can press the rod (442). For example, the first elastic part (450B-4) may include a first contact area (450B-41) connected to the first fixed part (450A) and in contact with the first side of the rod (442) (e.g., the -X direction side), a second contact area (450B-42) that is bent at a non-zero acute angle from the first contact area (450B-41), extends and contacts the second side of the rod (442) (e.g., the side between the +X direction side and the +Y direction side), and a third contact area (450B-43) that is bent at a non-zero acute angle from the second contact area (450B-42), extends toward the fixed part (450A-4), and contacts the third side of the rod (442) (e.g., the side between the +X direction side and the -Y direction side). The third contact area (450B-43) can be spaced apart from the fixed part (450A-4).

[0114] FIG. 19 is a schematic diagram showing a piezoelectric actuator according to one embodiment.

[0115] Referring to FIG. 19, a piezoelectric actuator (440-5) (e.g., piezoelectric actuator (440) of FIG. 5 to 13, piezoelectric actuator (440-1) of FIG. 14 and 15, piezoelectric actuator (440-2) of FIG. 16, piezoelectric actuator (440-3) of FIG. 17 and / or piezoelectric actuator (440-4) of FIG. 18) comprises a rod (442), a first plate (450-5) (e.g., the first plate (450) of FIG. 5 to 13, the first plate (450) of FIG. 14 and 15, the first plate (450-3) of FIG. 17 and / or the plate (450-4) of FIG. 18), and a second plate (451-5) (e.g., FIG. 5 to 13 It may include a second plate (451), the second plate (451) of FIG. 14 and FIG. 15 and / or the second plate (451-3) of FIG. 17), a third plate (452-5) (e.g., the third plate (452) of FIG. 5 to FIG. 13, the third plate (452) of FIG. 14 and FIG. 15 and / or the third plate (452-3) of FIG. 17), and a ball (B) (e.g., the first ball (B1) of FIG. 5 to FIG. 13, the second ball (B2) and / or the third ball (B3), the ball (B) of FIG. 17 and / or the ball (B) of FIG. 18).

[0116] The first plate (450-5) may include a first fixing part (450A) fixed to a platform (e.g., platform (445) of FIGS. 5 to 13, platform (445) of FIGS. 14 and 15 and / or platform (445-3) of FIGS. 17) and disposed on a surface facing a base frame (e.g., base frame (421) of FIGS. 5 to 13) opposite to a carrier (e.g., carrier (435) of FIGS. 5 to 13, carrier (435-1) of FIGS. 14 and 15 and / or carrier (435) of FIGS. 17), a first elastic part (450B) disposed between a rod (442) and a base frame, and a second elastic part (450C) disposed between a platform and at least one ball (B).

[0117] The second plate (451-5) may include a first part (451A) disposed on the platform between the load (442) and the carrier, and a second part (451B) disposed between the load (442) and the carrier.

[0118] The third plate (452-5) may include a second fixed part (452A) fixed to the platform and disposed on a surface facing the base frame opposite to the carrier, and a third elastic part (452B) disposed between the platform and at least one ball (B).

[0119] One aspect of the disclosure can provide a camera module that acquires images of stable quality by reducing the tilt of camera-related components.

[0120] One aspect of the disclosure can provide a camera module having a certain quality at the time of manufacturing.

[0121] The technical problems to be solved in this disclosure are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this disclosure pertains.

[0122] A camera module (400) may include a lens (411) that includes an optical axis (A). The camera module (400) may include a carrier (435) configured to transport the lens (411) in a direction along the optical axis (A). The camera module (400) may include a piezoelectric actuator (440) configured to drive the carrier (435). The camera module (400) may include a camera housing (420) configured to accommodate the carrier (435) and the piezoelectric actuator (440). The piezoelectric actuator (440) may include a motor (441) configured to generate vibration. The piezoelectric actuator (440) may include a rod (442) connected to the motor (441) and configured to vibrate in a direction along the optical axis (A). The piezoelectric actuator (440) may include a platform (445) coupled to the carrier (435). The piezoelectric actuator (440) may include a first ball (B1) disposed between the camera housing (420) and the platform (445). The piezoelectric actuator (440) may include a first plate (450) coupled to the platform (445) and configured to press the rod (442) and the first ball (B1).

[0123] The first plate (450) may include a first fixed part (450A) fixed to the platform (445). The first plate (450) may include a first elastic part (450B) in contact with the rod (442). The first plate (450) may include a second elastic part (450C) in contact with the first ball (B1).

[0124] The piezoelectric actuator (440) may include a second plate (451) configured to be placed on the platform (445) and to press the rod (442).

[0125] The first plate (450) and the second plate (451) can be separated by a gap.

[0126] The second plate (451) above may be integral with the platform (445).

[0127] The first plate (450) may contact the rod (442) at one point. The second plate (451) may contact the rod (442) at multiple points.

[0128] The first plate (450) may be placed between the carrier (435) and the rod (442). The second plate (451) may be placed between the rod (442) and the camera housing (420).

[0129] The piezoelectric actuator (440) may include a second ball (B2) disposed between the camera housing (420) and the platform (445). The piezoelectric actuator (440) may include a third plate (452) disposed on the platform (445) and configured to press the second ball (B2).

[0130] The third plate (452) may include a second fixed part (452A) fixed to the platform (445). The third plate (452) may include a third elastic part (452B) in contact with the second ball (B2).

[0131] The above rod (442) may be placed in the central area of ​​the platform (445). The first ball (B1) may be placed in the peripheral area of ​​the platform (445).

[0132] The vibration direction of the motor (441) may be substantially the same as the vibration direction of the rod (442).

[0133] The vibration direction of the motor (441-2) can be substantially orthogonal to the vibration direction of the rod (442).

[0134] The rod (442) may be placed in a first peripheral area of ​​the platform (445-3). The first ball (B) may be placed in a second peripheral area of ​​the platform (445-3) opposite to the first peripheral area.

[0135] The first plate (450-4) can come into contact with the rod (442) at least three points.

[0136] The first plate (450-5) may be placed between the rod (442) and the camera housing (420). The second plate (451-5) may be placed between the carrier (435) and the rod (442).

[0137] A camera module (400-1) may include a lens (411) that includes an optical axis (A). The camera module (400-1) may include a carrier (435-1) configured to carry the lens (411) in a direction along the optical axis (A). The carrier (435-1) may include a guide hole (436). The camera module (400-1) may include a piezoelectric actuator (440-1) configured to drive the carrier (435-1). The camera module (400-1) may include a camera housing (420) configured to accommodate the carrier (435-1) and the piezoelectric actuator (440-1). The camera module (400-1) may include a guide shaft (460) disposed in the guide hole (436). The piezoelectric actuator (440-1) may include a motor (441) configured to generate vibration. The piezoelectric actuator (440-1) may include a rod (442) connected to the motor (441) and configured to vibrate in a direction along the optical axis (A). The piezoelectric actuator (440-1) may include a platform (445) coupled to the carrier (435-1). The piezoelectric actuator (440-1) may include a first plate (450) coupled to the platform (445) and configured to press the rod (442) and the guide shaft (460).

[0138] The first plate (450) may include a first fixed part (450A) fixed to the platform (445). The first plate (450) may include a first elastic part (450B) in contact with the rod (442). The first plate (450) may include a second elastic part (450C) in contact with the guide shaft (460).

[0139] The above piezoelectric actuator (440-1) may include a second plate (451) configured to be placed on the platform (445) and to press the rod (442).

[0140] The rod (442) may be placed in a first peripheral area of ​​the platform (445). The guide shaft (460) may be placed in a second peripheral area of ​​the platform (445) opposite to the first peripheral area.

[0141] The electronic device (101; 301) may include the camera module (400; 400-1; 400-3).

[0142] According to one embodiment, the piezoelectric actuator is directly connected to the load during autofocus adjustment, thereby structurally simplifying and miniaturizing the carrier and guide, increasing driving efficiency, and reducing power consumption.

[0143] According to one embodiment, an autofocus function with increased precision can be secured by obtaining high resolution during autofocus and magnification adjustment.

[0144] According to one embodiment, a pre-tension generating structure in which a drive shaft and a guide shaft are integrated can reduce the distance between the drive shaft and the guide shaft, easily maintain alignment of the drive shaft and the guide shaft, reduce image quality degradation caused by movements such as tilt that may occur due to friction between camera-related mechanical components, and ensure uniform actuator performance and noise quality during manufacturing.

[0145] According to one embodiment, the impact on the actuator from vibration caused by high-frequency disturbances is mechanically reduced, and image vibration can be reduced through fine displacement control.

[0146] The effects of the camera module according to the embodiments are not limited to those mentioned above, and other unmentioned effects will be clearly understood by a person skilled in the art from the description in the specification.

[0147] The embodiments of this document are illustrative and are not intended to be limiting. Various modifications to the details of the disclosure may be made, including to the appended claims and their equivalents. Any of the embodiment(s) described herein may be used in combination with the embodiment(s) described herein.

Claims

1. A lens (411) including an optical axis (A), A carrier (435) configured to transport the lens (411) in a direction along the optical axis (A), A piezoelectric actuator (440) configured to drive the above carrier (435), and It includes a camera housing (420) configured to accommodate the carrier (435) and the piezoelectric actuator (440), and The above piezoelectric actuator (440) is, A motor (441) configured to generate vibrations, A rod (442) connected to the motor (441) and configured to vibrate in the direction according to the optical axis (A), Platform (445) coupled to the above carrier (435), A first ball (B1) disposed between the camera housing (420) and the platform (445), and A camera module (400) comprising a first plate (450) coupled to the platform (445) and configured to press the rod (442) and the first ball (B1).

2. In Paragraph 1, The first plate (450) above is, A first fixed part (450A) fixed to the above platform (445), A first elastic part (450B) in contact with the above rod (442), and A camera module comprising a second elastic part (450C) in contact with the first ball (B1).

3. In Paragraph 1 or 2, The camera module further comprising a second plate (451) configured to be positioned on the platform (445) and to press the rod (442), the piezoelectric actuator (440).

4. In Paragraph 3, The first plate (450) and the second plate (451) are camera modules separated by a gap.

5. In Paragraph 3 or 4, The second plate (451) is a camera module integrated with the platform (445).

6. In any one of paragraphs 3 through 5, A camera module in which the first plate (450) contacts the rod (442) at one point, and the second plate (451) contacts the rod (442) at multiple points.

7. In any one of paragraphs 3 through 6, The first plate (450) is positioned between the carrier (435) and the rod (442), and the second plate (451) is positioned between the rod (442) and the camera housing (420), forming a camera module.

8. In any one of paragraphs 3 through 7, The above piezoelectric actuator (440) is, A second ball (B2) disposed between the camera housing (420) and the platform (445), and It further includes a third plate (452) disposed on the platform (445) and configured to press the second ball (B2), and Preferably, the third plate (452) is, A second fixed part (452A) fixed to the above platform (445), and A camera module comprising a third elastic part (452B) in contact with the second ball (B2).

9. In any one of paragraphs 1 through 8, The above rod (442) is positioned in the central area of ​​the platform (445), and the first ball (B1) is positioned in the peripheral area of ​​the platform (445).

10. In any one of paragraphs 1 through 9, The vibration direction of the motor (441) is substantially the same as the vibration direction of the rod (442); A camera module in which the vibration direction of the motor (441-2) is substantially orthogonal to the vibration direction of the rod (442).

11. In any one of paragraphs 1 through 10, The rod (442) is positioned in a first peripheral area of ​​the platform (445-3), and the first ball (B) is positioned in a second peripheral area of ​​the platform (445-3) opposite to the first peripheral area, forming a camera module.

12. In any one of paragraphs 1 to 11, The first plate (450-4) is a camera module that contacts the rod (442) at least three points.

13. In any one of paragraphs 3 through 12, The first plate (450-5) is positioned between the rod (442) and the camera housing (420), and the second plate (451-5) is positioned between the carrier (435) and the rod (442) of the camera module.

14. Lens (411) including an optical axis (A), A carrier (435-1) configured to transport the lens (411) in a direction along the optical axis (A), wherein the carrier (435-1) includes a guide hole (436), A piezoelectric actuator (440-1) configured to drive the above carrier (435-1), A camera housing (420) configured to accommodate the carrier (435-1) and the piezoelectric actuator (440-1), and It includes a guide shaft (460) disposed in the guide hole (436), and The above piezoelectric actuator (440-1) is, A motor (441) configured to generate vibrations, A rod (442) connected to the motor (441) and configured to vibrate in the direction according to the optical axis (A), A platform (445) coupled to the above carrier (435-1), and It includes a first plate (450) coupled to the platform (445) and configured to press the rod (442) and the guide shaft (460), and Preferably, the first plate (450) is, A first fixed part (450A) fixed to the above platform (445), A first elastic part (450B) in contact with the above rod (442), and It includes a second elastic part (450C) that contacts the guide shaft (460), and Preferably, the piezoelectric actuator (440-1) further includes a second plate (451) disposed on the platform (445) and configured to press the rod (442), and Preferably, the rod (442) is positioned in a first peripheral area of ​​the platform (445), and the guide shaft (460) is positioned in a second peripheral area of ​​the platform (445) opposite to the first peripheral area, forming a camera module.

15. An electronic device comprising a camera module according to any one of claims 1 to 14.

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