Camera module and operation method thereof

Abstract

In this operation method of a camera module, the camera module comprises: an image sensor; a first lens assembly; and a first driving circuit including a first coil and a first magnet, wherein the first driving circuit is configured to move the first lens assembly in at least one axial direction. The operation method of a camera module may comprise the operations of: applying a driving voltage to the first driving circuit according to a linear driving method on the basis of a first value being greater than a specified value, the first value being related to a first maximum current value flowing through the first coil and noise of the image sensor on the basis of a first distance between the first coil and the image sensor; and applying the driving voltage to the first driving circuit according to a PWM method on the basis of the first value not being greater than the specified value. Various other embodiments are possible.

Description

Camera module and method of operation thereof

[0001] Embodiments of the present disclosure relate to a camera module and a method of operating the same.

[0002] As digital camera technology developed, electronic devices equipped with compact, lightweight cameras became commercially available. With cameras integrated into electronic devices, users could easily take photos and videos, as well as utilize various features like video calls and augmented reality.

[0003] A camera can perform an image stabilization function to compensate for image disturbances. Here, disturbances can be artifacts, such as blurring of images captured by a camera module due to slight hand tremors when a user takes a photo or records a video. An image stabilization function, such as a shake (or hand shake) correction function, can prevent or mitigate shake in captured images or videos by moving a lens assembly included in a camera module along a plane perpendicular to the optical axis to compensate for limited movement of electronic devices due to a fixed device or the user's grip. To this end, the camera can include a coil and a magnet. An energized coil can generate an electromagnetic force through electromagnetic interaction with a magnet, and the camera can perform a shake correction function using the generated electromagnetic force. There are various methods that can be applied to correct shake using electromagnetic force, such as lens shift, which moves the lens assembly, prism shift, which moves the prism, and module tilt, which tilts the camera.

[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 related to the present disclosure.

[0005] According to one embodiment, in a method of operating a camera module, the camera module includes an image sensor, a first lens assembly, and a first drive circuit including a first coil and a first magnet, wherein the first drive circuit can be configured to move the first lens assembly in at least one axial direction.

[0006] According to one embodiment, a method of operating a camera module may include applying a driving voltage to the first driving circuit according to a linear driving method based on a first maximum current value flowing in the first coil and a first value related to noise of the image sensor based on a first distance between the first coil and the image sensor being greater than a specified value.

[0007] According to one embodiment, in a method of operating a camera module, an operation of applying the driving voltage to the first driving circuit according to a PWM (pulse width modulation) method may be included based on the first value being not greater than the specified value.

[0008] According to one embodiment, a camera module includes an image sensor, a first lens assembly, a control circuit, and at least one driving circuit, wherein the at least one driving circuit can be configured to move the first lens assembly in at least one axial direction.

[0009] According to one embodiment, in the camera module, the control circuit can apply a driving voltage to the at least one driving circuit according to a PWM (pulse width modulation) method.

[0010] According to one embodiment, in the camera module, a maximum current value flowing in each coil included in the at least one driving circuit and a value related to noise of the image sensor based on a distance between each coil and the image sensor may be less than or equal to a specified value.

[0011] According to one embodiment, a camera module includes an image sensor, a first lens assembly, a control circuit, and a plurality of drive circuits including a first drive circuit including a first magnet and a first coil and a second drive circuit including a second magnet and a second coil, wherein at least some of the plurality of drive circuits can be configured to move the first lens assembly in at least one axial direction.

[0012] According to one embodiment, in the camera module, the control circuit can apply a driving voltage to the first driving circuit according to a PWM (pulse width modulation) method and apply the driving voltage to the second driving circuit according to a linear method.

[0013] According to one embodiment, in the camera module, a first value related to noise of the image sensor based on a first maximum current value flowing in the first coil and a first distance between the first coil and the image sensor may be less than a second maximum current value flowing in the second coil and a second value related to noise of the image sensor between the second coil and the image sensor.

[0014] FIG. 1 is a block diagram of an electronic device within a network environment according to various embodiments.

[0015] FIG. 2 is a block diagram illustrating a camera module according to one embodiment.

[0016] FIG. 3A is a diagram showing a driving circuit of a camera module according to one embodiment.

[0017] FIG. 3b is a diagram showing a driving circuit of a camera module according to one embodiment.

[0018] FIG. 4 is a schematic block diagram of a camera module according to one embodiment.

[0019] FIG. 5 is a schematic block diagram of an electronic device according to one embodiment.

[0020] FIG. 6 is a graph for explaining the maximum value of current flowing in a coil according to one embodiment.

[0021] FIG. 7A is a flowchart illustrating an operation of an electronic device setting a driving method of at least one driving circuit according to one embodiment.

[0022] FIG. 7b is a flowchart illustrating an operation of an electronic device setting a driving method of at least one driving circuit according to one embodiment.

[0023] FIG. 8 is a flowchart illustrating an operation of an electronic device driving at least one driving circuit according to a preset driving method, according to one embodiment.

[0024] FIG. 9 is a flowchart illustrating an operation of an electronic device to determine a specified value related to noise of an image sensor, according to one embodiment.

[0025] FIG. 10 is a drawing schematically showing the structure of a camera module according to one embodiment.

[0026] FIG. 11 is a diagram showing the distance between a camera module and an image sensor according to one embodiment.

[0027] FIG. 12A is a drawing schematically showing the structure of a camera module according to one embodiment.

[0028] FIG. 12b is a diagram showing the distance between a camera module and an image sensor according to one embodiment.

[0029] FIG. 13 is a drawing schematically showing the structure of a camera module according to one embodiment.

[0030] FIG. 14 is a diagram illustrating a magnetic flux for explaining the relationship between a magnetic field generated by a coil and noise of an image sensor based on a distance between the coil and the image sensor included in a driving circuit according to one embodiment.

[0031] FIG. 15 is a diagram illustrating a magnetic flux for explaining the relationship between a magnetic field generated by a coil and noise of an image sensor based on a distance between the coil and the image sensor included in a driving circuit according to one embodiment.

[0032] FIG. 16 is a flowchart illustrating an operation of an electronic device according to one embodiment of the present invention to determine a driving method of a first driving circuit, a driving method of a second driving circuit, and a driving method of a third driving circuit.

[0033] FIG. 1 is a block diagram of an electronic device (101) within a network environment (100) according to various embodiments. 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). In 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 some embodiments, the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added. In some embodiments, 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)).

[0034] 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.

[0035] 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, in the electronic device (101) itself where artificial intelligence is performed, 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.

[0036] 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).

[0037] 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).

[0038] 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).

[0039] 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.

[0040] 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.

[0041] 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).

[0042] 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.

[0043] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) with 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.

[0044] 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).

[0045] 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.

[0046] The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0047] 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).

[0048] 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.

[0049] 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 (104) 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).

[0050] 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.

[0051] 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 (197) 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 by, for example, 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 some embodiments, 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).

[0052] In one embodiment, the antenna module (197) may generate 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 side) of the printed circuit board and capable of transmitting or receiving signals in the designated high frequency band.

[0053] 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)).

[0054] 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 a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (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 another 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.

[0055] FIG. 2 is a block diagram (200) illustrating a camera module (180) according to one embodiment.

[0056] 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 a target of image capturing. 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 that are different from the lens properties of the other lens assemblies. A lens assembly (210) may include, for example, a wide-angle lens or a telephoto lens.

[0057] The flash (220) can emit light used to enhance light emitted or reflected from a subject. In one embodiment, the flash (220) can include one or more light-emitting diodes (e.g., red-green-blue (RGB) LED, white LED, infrared LED, or ultraviolet LED), or a xenon lamp. The image sensor (230) can acquire an image corresponding to the subject by converting light emitted or reflected from the subject and transmitted through the lens assembly (210) into an electrical signal. In one embodiment, the image sensor (230) can include one image sensor selected from among image sensors having different properties, such as, for example, an RGB sensor, a black and white (BW) sensor, an IR sensor, or a UV sensor, a plurality of image sensors having the same property, or a plurality of image sensors having different properties. Each image sensor included in the image sensor (230) can be implemented using, for example, a CCD (charged coupled device) sensor or a CMOS (complementary metal oxide semiconductor) sensor.

[0058] The image stabilizer (240) can move at least one lens or image sensor (230) included in the lens assembly (210) in a specific direction or control the operating characteristics of the image sensor (230) (e.g., adjusting the read-out timing, etc.) in response to the movement of the camera module (180) or the electronic device (101) including the same. This allows compensating for at least some of the negative effects of the movement on the captured image. In one embodiment, the image stabilizer (240) can detect such movement of the camera module (180) or the electronic device (101) by using a gyro sensor (not shown) or an acceleration sensor (not shown) disposed inside or outside the camera module (180). In one embodiment, the image stabilizer (240) can be implemented as, for example, an optical image stabilizer. The memory (250) can temporarily store at least a portion of the image acquired through the image sensor (230) for the next image processing task. For example, when image acquisition is delayed due to the shutter, or when multiple images are acquired at high speed, the acquired original image (e.g., a Bayer-patterned image or a high-resolution image) is stored in the memory (250), and a corresponding copy image (e.g., a low-resolution image) can be previewed through the display module (160). Thereafter, when a specified condition is satisfied (e.g., a user input or a system command), at least a portion of the original image stored in the memory (250) can be acquired and processed, for example, by the image signal processor (260). According to one embodiment, the memory (250) can be configured as at least a portion of the memory (130), or as a separate memory that operates independently therefrom.

[0059] The image signal processor (260) can perform one or more image processing operations on an image acquired through an image sensor (230) or an image stored in a memory (250). The one or more image processing operations may include, for example, depth map generation, 3D modeling, panorama generation, feature extraction, image synthesis, or image compensation (e.g., noise reduction, resolution adjustment, brightness adjustment, blurring, sharpening, or softening). Additionally or alternatively, the image signal processor (260) may perform control (e.g., exposure time control, read-out timing control, etc.) on at least one of the components included in the camera module (180) (e.g., image sensor (230)). An image processed by the image signal processor (260) may be stored back in the 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)). In one embodiment, the image signal processor (260) may be at least a part of the processor (120). It may be configured as a separate processor that is configured or operates independently from 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 undergoing additional image processing by the processor (120).

[0060] According to one embodiment, the electronic device (101) may include a plurality of camera modules (180), each having different properties 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.

[0061] FIG. 3A is a diagram showing a driving circuit of a camera module according to one embodiment.

[0062] Referring to (a) of FIG. 3A, according to one embodiment, the camera module (400) (e.g., the camera module (400) of FIG. 4) may include a driving circuit. For example, the driving circuit may include a driving circuit configured to move the lens assembly (403) (e.g., the lens assembly (403) of FIG. 4) in a first axial direction so that the camera module (400) performs an AF (auto focus) function. For example, the driving circuit may include a driving circuit configured to move the lens assembly (403) or the reflective member in a second axial direction perpendicular to the first axial direction or in a third axial direction perpendicular to the first axial direction and the second axial direction so that the camera module (400) performs an OIS (optical image stabilization) function.

[0063] According to one embodiment, the driving circuit may include a first p-channel metal oxide semiconductor (PMOS) transistor (P1), a second PMOS transistor (P2), a first n-channel metal oxide semiconductor (NMOS) transistor (N1), and a second NMOS transistor (N2). According to one embodiment, the first PMOS transistor (P1), the second PMOS transistor (P2), the first NMOS transistor (N1), and the second NMOS transistor (N2) may be implemented as field effect transistor (FET) elements or bipolar junction transistor (BJT) elements. According to one embodiment, the driving circuit may include a coil (311) and a magnet (not shown).

[0064] According to one embodiment, the first PMOS transistor (P1), the second PMOS transistor (P2), the first NMOS transistor (N1), and the second NMOS transistor (N2) may be elements for controlling the direction of current applied to the coil (311).

[0065] According to one embodiment, the first PMOS transistor (P1), the second PMOS transistor (P2), the first NMOS transistor (N1), and the second NMOS transistor (N2) can form an H-bridge.

[0066] According to one embodiment, the first PMOS transistor (P1) may be disposed between the driving power source (Vm) and one end of the coil (311). According to one embodiment, the second NMOS transistor (N2) may be disposed between one end of the coil (311) and ground. According to one embodiment, the second PMOS transistor (P2) may be disposed between the driving power source (Vm) and the other end of the coil (311). According to one embodiment, the first NMOS transistor (N1) may be disposed between the other end of the coil (311) and ground.

[0067] According to one embodiment, the camera module (400) may apply the driving voltage (370) to the driving circuit in a linear manner. For example, the linear manner may include a method in which the camera module (400) applies the driving voltage to the driving circuit by adjusting the amplitude of the voltage (370) output by the driving power (Vm). According to one embodiment, the larger the magnitude of the voltage (370) output by the driving power, the larger the current flowing in the coil (311) may be. According to one embodiment, the smaller the magnitude of the voltage (370) output by the driving power, the smaller the current flowing in the coil (311) may be.

[0068] Referring to (b) of FIG. 3a, according to one embodiment, when a driving voltage is applied to the driving circuit, current may flow in the coil (311). According to one embodiment, the magnet may move based on an electromagnetic force generated through an electromagnetic interaction between the magnet and the coil (311).

[0069] According to one embodiment, when the driving circuit is driven in a linear manner, the value of the current consumed by the driving circuit may represent the I1 value (371). According to one embodiment, when the driving voltage (370) is applied to the driving circuit in a linear manner, the influence of the magnetic field generated by the electromagnetic force by the coil (311) and the magnet may not affect the image sensor.

[0070] FIG. 3b is a diagram showing a driving circuit of a camera module according to one embodiment.

[0071] Referring to (a) of FIG. 3b, according to one embodiment, the camera module (400) (e.g., the camera module (400) of FIG. 4) can apply a driving voltage (380) to the driving circuit in a PWM (pulse width modulation) manner.

[0072] According to one embodiment, the PWM (pulse width modulation) method may include a method in which the camera module (400) controls the duty ratio at which the driving power (Vm) is turned on and off, thereby applying a driving voltage (380) output from the driving power (Vm) to the driving circuit. For example, the driving voltage (380) may include a pulse wave.

[0073] Referring to (b) of FIG. 3B, according to one embodiment, when the driving circuit is driven by the PWM method, the value of the current consumed by the driving circuit may represent the I2 value (381). The I2 value (381) may represent a value smaller than the I1 value (371) (e.g., the I1 value (371) of FIG. 3A).

[0074] According to one embodiment, the power consumed by the driving circuit when the driving circuit is driven in a linear manner may be greater than the power consumed by the driving circuit when the driving circuit is driven in a PWM manner.

[0075] According to one embodiment, the camera module (400) can determine whether a magnetic field generated by an electromagnetic force by the coil (311) and the magnet affects the image sensor when the driving circuit is driven in a PWM manner based on a distance between the coil (311) and the image sensor and a maximum current value flowing in the coil (311). According to one embodiment, the camera module (400) can determine a driving method of the driving circuit as either a linear method or a PWM (pulse width modulation) method based on determining whether a magnetic field generated by an electromagnetic force by the coil (311) and the magnet affects the image sensor when the driving circuit is driven in a PWM manner.

[0076] According to one embodiment, the camera module (400) can determine whether a magnetic field generated by an electromagnetic force between the coil (311) and the magnet affects the image sensor when the driving circuit is driven in a PWM manner based on a value of the maximum current value flowing in the coil (311) divided by the square of the distance between the image sensor and the coil (311). For example, the smaller the maximum current value and the larger the distance between the image sensor and the coil (311), the less the magnetic field can affect the image sensor.

[0077] According to one embodiment, the camera module (400) may determine the driving method of the driving circuit to be PWM (pulse width modulation) if it is confirmed that the magnetic field generated by the electromagnetic force of the coil (311) and the magnet does not affect the image sensor when the driving circuit is driven in the PWM method. Through this, according to one embodiment, the camera module (400) may relatively reduce the power consumed by the driving circuit.

[0078] According to one embodiment, when the camera module (400) determines that a magnetic field generated by an electromagnetic force by a coil (311) and a magnet affects an image sensor when the driving circuit is driven in a PWM manner, the driving method of the driving circuit can be determined in a linear manner so as not to generate noise in the image sensor.

[0079] In the following, for convenience of explanation, the driving circuit is described as including a magnet and a coil.

[0080] FIG. 4 is a schematic block diagram of a camera module according to one embodiment.

[0081] Referring to FIG. 4, according to one embodiment, a camera module (400) (e.g., camera module (180) of FIG. 2) may include an image sensor (402) (e.g., image sensor (230) of FIG. 2), a lens assembly (403) (e.g., lens assembly (210) of FIG. 2), a plurality of driving circuits, and a control circuit (440).

[0082] According to one embodiment, the control circuit (440) can control the overall operation of the camera module (400).

[0083] According to one embodiment, the plurality of driving circuits may include a first driving circuit (410) and a second driving circuit (420). According to one embodiment, the number of driving circuits may not be limited thereto.

[0084] According to one embodiment, the first drive circuit (410) may include a drive circuit configured to move (or rotate) the lens assembly (403) or the image sensor (230) so that the camera module (400) performs an auto focus (AF) function.

[0085] According to one embodiment, the second driving circuit (420) may include a driving circuit configured to move (or rotate) the lens assembly (403) or the image sensor (230) so that the camera module (400) performs an optical image stabilization (OIS) function. Alternatively, the second driving circuit (420) may include a driving circuit configured to move (or rotate) the reflective member so that the camera module (400) performs an optical image stabilization (OIS) function.

[0086] According to one embodiment, the first drive circuit (410) may include a first coil (411) and a first magnet (412). According to one embodiment, the first magnet (412) may include at least one magnet that moves in at least one axial direction. The at least one magnet may include at least one of a first-axis magnet that moves in a first axial direction (e.g., a Z-axis direction), a second-axis magnet that moves in a second axial direction (e.g., an X-axis direction), or a third-axis magnet that moves in a third axial direction (e.g., a Y-axis direction). According to one embodiment, the first coil (411) may include at least one coil that is arranged to face the at least one magnet that moves in the at least one axial direction. The at least one coil may include at least one of a first-axis coil that is arranged to face the first-axis magnet, a second-axis coil that is arranged to face the second-axis magnet, or a third-axis coil that is arranged to face the third-axis magnet. According to one embodiment, when a driving voltage is applied to the first driving circuit (410), the first magnet (412) can move in at least one axial direction (e.g., the Z-axis of FIG. 10, the X-axis of FIG. 12a), and the first coil (411) can be placed at a fixed position.

[0087] In one embodiment, the second drive circuit (420) may include a second coil (421) and a second magnet (422). In one embodiment, the second magnet (422) may include at least one magnet that moves in at least one axial direction. The at least one magnet may include at least one of a first-axis magnet that moves in a first axial direction, a second-axis magnet that moves in a second axial direction, or a third-axis magnet that moves in a third axial direction. In one embodiment, the second coil (421) may include at least one coil that is arranged to face the at least one magnet that moves in the at least one axial direction. The at least one coil may include at least one of a first-axis coil that is arranged to face the first-axis magnet, a second-axis coil that is arranged to face the second-axis magnet, or a third-axis coil that is arranged to face the third-axis magnet. According to one embodiment, when a driving voltage is applied to the second driving circuit (420), the second magnet (422) moves in a first axis direction (e.g., the Z-axis of FIG. 12a), a second axis direction (e.g., the X-axis of FIG. 10) or a third axis direction (e.g., the Y-axis of FIG. 10, the Y-axis of FIG. 12a), and the second coil (421) can be placed at a fixed position. For example, when the camera module (400) is implemented as a direct-type camera (e.g., the camera module (1000) of FIG. 10), the second magnet (422) can move in a third axis direction (e.g., the Y-axis of FIG. 10) to perform an OIS function of the camera module (400) that compensates for the position of the camera module (400) moving in the third axis direction. Alternatively, when the camera module (400) is implemented as a direct-type camera (e.g., the camera module (1000) of FIG. 10), the second magnet (422) can move in the second axis direction (e.g., the X-axis of FIG. 10) to perform the OIS function of the camera module (400) that compensates for the position of the camera module (400) moving in the second axis direction.

[0088] For example, when the camera module (400) is implemented as a folded camera (e.g., the camera module (1200) of FIG. 12a), the second magnet (422) may perform an OIS function of the camera module (400) to compensate for the position of the camera module (1200) moving in a third axis direction (e.g., the Y axis) based on movement in a first axis direction (e.g., the Z axis of FIG. 12a). For example, when the camera module (400) is implemented as a folded camera (e.g., the camera module (1200) of FIG. 12a), the second magnet (422) may perform an OIS function of the camera module (400) to compensate for the position of the camera module (1200) moving in a second axis direction (e.g., the X axis) based on movement in a third axis direction (e.g., the Y axis of FIG. 12a). For example, the first axis direction may include an optical axis direction. For example, the second axis direction and the third axis direction may include a direction perpendicular to the optical axis direction.

[0089] According to one embodiment, the camera module (400) may be implemented as a direct-type camera in which light incident on the lens assembly (403) is transmitted to the image sensor (402) without being refracted.

[0090] According to one embodiment, the first drive circuit (410) may include a drive circuit configured to move the lens assembly (403) in a first axis direction (e.g., the Z-axis of FIG. 10) so that the camera module (400) performs an auto focus (AF) function.

[0091] According to one embodiment, the second drive circuit (420) may include a second-axis drive circuit configured to move the lens assembly (403) in a second-axis direction (e.g., the X-axis of FIG. 10) perpendicular to the first-axis direction so that the camera module (400) performs an optical image stabilization (OIS) function, and / or a third-axis drive circuit configured to move the lens assembly (403) in a third-axis direction (e.g., the Y-axis of FIG. 10).

[0092] According to one embodiment, the control circuit (440) may apply a driving voltage to the first driving circuit (410) using a PWM method or a linear method. According to one embodiment, the first magnet (412) may move based on an electromagnetic force generated through an electromagnetic interaction between the first coil (411) and the first magnet (412). According to one embodiment, based on the movement of the first magnet (412), the lens assembly (403) may move in the first axial direction.

[0093] According to one embodiment, the linear method may include a method in which the control circuit (440) applies the driving voltage to the driving circuit by adjusting the amplitude of the voltage output by the driving power source. According to one embodiment, the pulse width modulation (PWM) method may include a method in which the control circuit (440) applies the driving voltage output from the driving power source to the driving circuit by adjusting the duty ratio of turning the driving power source on and off.

[0094] According to one embodiment, the control circuit (440) may apply a driving voltage to the second driving circuit (420) using a PWM method or a linear method. According to one embodiment, the second magnet (422) may move based on an electromagnetic force generated through an electromagnetic interaction between the second coil (421) and the second magnet (422). According to one embodiment, based on the movement of the second magnet (422), the lens assembly (403) may move in the second axis direction or the third axis direction.

[0095] For example, the control circuit (440) may apply a driving voltage to the driving circuit in the second axis direction using a PWM method or a linear method. For example, the second axis magnet may move in the second axis direction based on an electromagnetic force generated through an electromagnetic interaction between the second axis magnet (e.g., 1022a of FIG. 10) and the second axis coil (e.g., 1021a of FIG. 10). As the second axis magnet moves in the second axis direction, the lens assembly (403) may move in the second axis direction.

[0096] For example, the control circuit (440) may apply a driving voltage to the third-axis driving circuit using a PWM method or a linear method. For example, the third-axis magnet may move in the third-axis direction based on an electromagnetic force generated through an electromagnetic interaction between the third-axis magnet (e.g., 1022b of FIG. 10) and the third-axis coil (e.g., 1021b of FIG. 10). As the third-axis magnet moves in the third-axis direction, the lens assembly (403) may move in the third-axis direction.

[0097] According to one embodiment, when a driving voltage is applied to the first driving circuit (410), the first coil (411) may be placed at a fixed position. According to one embodiment, when a driving voltage is applied to the driving circuit in the second axis direction, the second axis coil may be placed at a fixed position. According to one embodiment, when a driving voltage is applied to the driving circuit in the third axis direction, the third axis coil may be placed at a fixed position.

[0098] According to one embodiment, the camera module (400) may be implemented as a folded camera in which light reflected or refracted through a reflective member is transmitted to the image sensor (402). According to one embodiment, when the camera module (400) is implemented as a folded camera, it may further include a reflective member. For example, the reflective member may include a prism. According to one embodiment, the reflective member may change the path of light incident from the lens assembly (403) one or more times.

[0099] According to one embodiment, the first driving circuit (410) may include a driving circuit configured to move the lens assembly (403) in a second axial direction (e.g., the X-axis of FIG. 12A) so that the camera module (400) performs an auto focus (AF) function. According to one embodiment, the second driving circuit (420) may include a driving circuit configured to move the reflective member in at least one axial direction (e.g., the X-axis, the Y-axis, the Z-axis of FIG. 12A) or rotate the reflective member about at least one axial direction as a rotational axis so that the camera module (400) performs an optical image stabilization (OIS) function.

[0100] According to one embodiment, the control circuit (440) may apply a driving voltage to the first driving circuit (410) using a linear or PWM method so that the camera module (400) performs an AF (auto focus) function. According to one embodiment, the lens assembly (403) may move in the second axis direction (e.g., the X-axis in FIG. 12a) based on the movement of the first magnet (412) (e.g., the first magnet (1222a) in FIG. 12a) in the second axis direction (e.g., the X-axis in FIG. 12a).

[0101] According to one embodiment, the control circuit (440) may apply a driving voltage to the second driving circuit (420) using a linear or PWM manner so that the camera module (400) performs the OIS function. According to one embodiment, based on the movement of the second magnet (422) (e.g., the second magnets (1212, 1222b) of FIG. 12a), the reflective member (e.g., 1230 of FIG. 12a)) may move in a first axis direction (e.g., the Z-axis of FIG. 12a), a second axis direction (e.g., the X-axis of FIG. 12a), or a third axis direction (e.g., the Y-axis of FIG. 12a). Alternatively, according to one embodiment, based on the movement of the second magnet (422), the reflective member may rotate about a first axis direction (e.g., the Z-axis in FIG. 12a), a second axis direction (e.g., the X-axis in FIG. 12a), or a third axis direction (e.g., the Y-axis in FIG. 12a) as the rotational axis.

[0102] For example, the control circuit (440) can apply a driving voltage to a driving circuit in the first axis direction (e.g., the Z-axis in FIG. 12a) using a linear method or a PWM method. For example, based on an electromagnetic force generated through an electromagnetic interaction between a first axis magnet (e.g., 1212 in FIG. 12a) and a first axis coil (e.g., 1211 in FIG. 12a), the first axis magnet can move in the first axis direction. For example, based on the movement of the first axis magnet in the first axis direction, the reflective member can move in the first axis direction or rotate about the first axis direction as a rotational axis.

[0103] For example, the control circuit (440) can apply a driving voltage to a driving circuit in the third axis direction (e.g., the Y-axis in FIG. 12a) using a linear method or a PWM method. For example, the third axis magnet can move in the third axis direction based on an electromagnetic force generated through an electromagnetic interaction between the third axis magnet (e.g., 1222b in FIG. 12) and the third axis coil (e.g., 1221b in FIG. 12). For example, the reflective member can move in the third axis direction based on the movement of the third axis magnet in the third axis direction.

[0104] According to one embodiment, when the camera module (400) is implemented as a folded camera that supports continuous optical zoom, the lens assembly (403) may be implemented in multiple units. According to one embodiment, the lens assembly (403) may include a first lens assembly, a second lens assembly, and a third lens assembly. However, this is an example, and the number of lens assemblies (403) may not be limited thereto. According to one embodiment, the camera module (400) may support continuous optical zoom that executes a zoom function that adjusts the zoom magnification by moving the third lens assembly.

[0105] According to one embodiment, the control circuit (440) may apply a driving voltage to the first driving circuit (410) using a linear or PWM method to move the first lens assembly in the first axis direction so that the camera module (400) performs an AF (auto focus) function.

[0106] According to one embodiment, the control circuit (440) may apply a driving voltage to the second driving circuit (420) using a linear or PWM manner to move the reflective member in a second axis direction perpendicular to the first axis direction and / or a third axis direction perpendicular to the second axis direction so that the camera module (400) performs an optical image stabilization (OIS) function. The reflective member may change the path of light received from the second lens assembly one or more times.

[0107] In one embodiment, the plurality of drive circuits may further include a third drive circuit (430). In one embodiment, the third drive circuit (430) may include a third coil (431) and a third magnet (432). In one embodiment, the third drive circuit (430) may include a drive circuit that moves the third lens assembly in at least one axial direction.

[0108] In one embodiment, the control circuit (440) may apply a driving voltage to the third drive circuit (430) using a linear or PWM manner to move the third lens assembly in at least one axial direction so that the camera module (400) performs a zoom function for adjusting a zoom ratio. In one embodiment, when the control circuit (440) applies the driving voltage to the third drive circuit (430), the third magnet (432) may be moved in at least one axial direction, and the third coil (431) may be positioned at a fixed position. In one embodiment, based on the movement of the third magnet (432), the third lens assembly may be moved in at least one axial direction.

[0109] Below, the operation in which the driving method of the first driving circuit (410), the second driving circuit (420), and the third driving circuit (430) are each preset is described.

[0110] According to one embodiment, the control circuit (440) can turn on the power of the camera module (400).

[0111] In one embodiment, the linear method may not generate noise in the image sensor (402) disposed around the driving circuit, but the current consumed by the driving circuit may be greater than that of the PWM method. In one embodiment, the PWM (pulse width modulation) method may generate noise in the image sensor (402) disposed around the driving circuit, but the current consumed by the driving circuit may be less than that of the linear method.

[0112] According to one embodiment, the control circuit (440) can compare a value related to a maximum current flowing in the coil and a distance between the image sensor (402) and the coil with a specified value related to noise of the image sensor (402).

[0113] According to one embodiment, the control circuit (440) can determine a first value representing a value obtained by dividing a first maximum current value flowing in the first coil (411) by a square value of a first distance between the first coil (411) and the image sensor (402). According to one embodiment, the first maximum current value can represent a value obtained by dividing a value obtained by multiplying a driving voltage applied to the first driving circuit (410) by the number of turns of the first coil (411) by a first resistance value of the first coil (411). For example, the first distance can represent a minimum distance between the center of the first coil (411) and the image sensor (402). For example, the first distance can also represent a maximum distance between the center of the first coil (411) and the image sensor (402). However, this is an example, and the first distance can be measured in various ways.

[0114] According to one embodiment, the control circuit (440) may set the driving method of the first driving circuit (410) to a linear method when the first value is greater than a specified value. According to one embodiment, the control circuit (440) may set the driving method of the first driving circuit (410) to a PWM method when the first value is not greater than the specified value.

[0115] According to one embodiment, the specified value may represent a value at which it is determined that the magnetic field generated by the electromagnetic force of the coil and magnet does not affect the image sensor (402) when the driving circuit is driven in a PWM manner, and thus noise of the image sensor (402) does not occur. For example, the specified value may be 500 (mA / mm 2 ) can be represented. For example, the specified value is 441 (mA / mm 2 ) can be represented. However, this is an example, and the specified value may include various numerical values. The specified value may be set by the user or automatically set by the control circuit (440).

[0116] According to one embodiment, if the control circuit (440) determines that the first value is not greater than a specified value, the driving method of the first driving circuit (410) can be set to a PWM method with a relatively small current consumption value among the PWM method and the linear method. According to one embodiment, if the control circuit (440) determines that the first value is greater than a specified value, the driving method of the first driving circuit (410) can be set to a linear method with a small influence of a magnetic field among the PWM method and the linear method.

[0117] According to one embodiment, the driving method of the first driving circuit (410) may be stored in the memory (510) (e.g., the memory (510) of FIG. 5) or the camera module (400) (e.g., the memory (250) of FIG. 2) corresponding to the first driving circuit (410).

[0118] According to one embodiment, the control circuit (440) can determine a second value corresponding to a value obtained by dividing a second maximum current value flowing in the second coil (421) by a square value of a second distance between the second coil (421) and the image sensor (402). According to one embodiment, the second maximum current value can represent a value obtained by dividing a value obtained by multiplying a driving voltage applied to the second driving circuit (420) by the number of turns of the second coil (421) by a second resistance value of the second coil (421). For example, the second distance can represent a minimum distance between the center of the second coil (421) and the image sensor (402). For example, the second distance can also represent a maximum distance between the center of the second coil (421) and the image sensor (402). However, this is an example, and the second distance can be measured in various ways.

[0119] According to one embodiment, the control circuit (440) may set the driving method of the second driving circuit (420) to a linear method when the second value is greater than a specified value. According to one embodiment, the control circuit (440) may set the driving method of the second driving circuit (420) to a PWM method when the second value is not greater than the specified value. According to one embodiment, the driving method of the second driving circuit (420) may be stored in the memory (510) or the camera module (400) in correspondence with the second driving circuit (420).

[0120] According to one embodiment, the control circuit (440) can determine a third value corresponding to a value obtained by dividing a third maximum current value flowing in the third coil (431) by the square of a third distance between the third coil (431) and the image sensor (402). According to one embodiment, the third maximum current value can represent a value obtained by dividing a value obtained by multiplying a driving voltage applied to the third driving circuit (430) by the number of turns of the third coil (431) by a third resistance value of the third coil (431). For example, the third distance can represent a minimum distance between the center of the third coil (431) and the image sensor (402). For example, the third distance can also represent a maximum distance between the center of the third coil (431) and the image sensor (402). However, this is an example, and the third distance can be measured in various ways.

[0121] According to one embodiment, the control circuit (440) may set the driving method of the third driving circuit (430) to a linear method when the third value is greater than a specified value. According to one embodiment, the control circuit (440) may set the driving method of the third driving circuit (430) to a PWM method when the third value is not greater than the specified value. According to one embodiment, the driving method of the third driving circuit (430) may be stored in the memory (510) or the camera module (400) in correspondence with the third driving circuit (430).

[0122] According to the implementation, according to one embodiment, the driving method of the driving circuits may be set by the designer as a PWM driving method or a linear driving method at the product design stage of the camera module (400) or the electronic device (501), respectively. According to one embodiment, the driving method of each of the set driving circuits may be stored in the memory (510) or the camera module (400) corresponding to each of the driving circuits.

[0123] According to one embodiment, the driving method of the driving circuits can be set to the PWM method at the product design stage of the camera module (400) or the electronic device (501). For example, in the case where the value related to noise between each of the driving circuits and the image sensor (402) is relatively small,

[0124] The driving method of the driving circuits can be set to PWM by the designer or the control circuit (440). According to one embodiment, the value related to noise between each of the driving circuits and the image sensor (402) is a specified value (e.g., 500 mA / mm 2 ) is not greater than, it can be set to a case where the value related to noise is relatively small.

[0125] According to one embodiment, the driving method of the driving circuits can be set to a linear driving method at the product design stage of the camera module (400) or the electronic device (501). For example, when the value related to noise between each of the driving circuits and the image sensor (402) is relatively large,

[0126] The driving method of the driving circuits can be set to a linear driving method by the designer or the control circuit (440). According to one embodiment, the value related to the noise between each of the driving circuits and the image sensor (402) is a specified value (e.g., 500 mA / mm 2 ) can be set to be a case where the value related to noise is relatively large.

[0127] Below, the operation of the control circuit (440) reading the driving methods of the driving circuits stored in the memory (510) or camera module (400) and driving the driving circuits is described.

[0128] According to one embodiment, the control circuit (440) can check the driving method of the first driving circuit (410) stored in the memory (510) or the camera module (400). According to one embodiment, the control circuit (440) can apply a driving voltage to the first driving circuit (410) according to the checked driving method of the first driving circuit (410).

[0129] According to one embodiment, the control circuit (440) can check the driving method of the second driving circuit (420) stored in the memory (510) or the camera module (400). According to one embodiment, the control circuit (440) can apply a driving voltage to the second driving circuit (420) according to the checked driving method of the second driving circuit (420).

[0130] According to one embodiment, the control circuit (440) can check the driving method of the third driving circuit (430) stored in the memory (510) or the camera module (400). According to one embodiment, the control circuit (440) can apply a driving voltage to the third driving circuit (430) according to the checked driving method of the third driving circuit (430).

[0131] FIG. 5 is a schematic block diagram of an electronic device according to one embodiment.

[0132] Referring to FIG. 5, according to one embodiment, an electronic device (501) (e.g., electronic device (101) of FIG. 1) may include a memory (510) (e.g., memory (130) of FIG. 1), a processor (520) (e.g., processor (120) of FIG. 1, control circuit (440) of FIG. 4), and a camera module (400) (e.g., camera module (180) of FIG. 1, camera module (180) of FIG. 2, camera module (400) of FIG. 4).

[0133] According to one embodiment, the camera module (400) may be implemented identically or similarly to the camera module (400) of FIG. 4. According to one embodiment, the description of the camera module (400) of FIG. 4 may be equally applied to the camera module (400) included in the electronic device (501).

[0134] According to one embodiment, the control circuit (440) (e.g., the control circuit (440) of FIG. 4) may be implemented as a processor (520). According to one embodiment, the operations performed by the control circuit (440) may be performed by the processor (520). According to one embodiment, the processor (520) may perform the overall operation of the electronic device (501).

[0135] According to one embodiment, the memory (510) can store instructions that can perform operations of the electronic device (501).

[0136] According to one embodiment, the processor (520) can turn on the power of the camera module (400).

[0137] According to one embodiment, the processor (520) can check (determine) the first driving method of the first driving circuit (410) (e.g., the first driving circuit (410) of FIG. 4) among the PWM (pulse width modulation) method and the linear method. For example, the processor (520) can check the first driving method by reading the first driving method of the first driving circuit (410) stored in the memory (510) or the camera module (400). According to one embodiment, the processor (520) can apply a driving voltage to the first driving circuit (410) based on the driving method of the first driving circuit (410).

[0138] According to one embodiment, the processor (520) can check (determine) the second driving method of the second driving circuit (420) (e.g., the second driving circuit (420) of FIG. 4) among the PWM (pulse width modulation) method and the linear method. For example, the processor (520) can check the second driving method by reading the second driving method of the second driving circuit (420) stored in the memory (510) or the camera module (400). According to one embodiment, the processor (520) can apply a driving voltage to the second driving circuit (420) based on the driving method of the second driving circuit (420).

[0139] According to one embodiment, the processor (520) can check (determine) the third driving method of the third driving circuit (430) (e.g., the third driving circuit (430) of FIG. 4) among the PWM (pulse width modulation) method and the linear method. For example, the processor (520) can check the third driving method by reading the third driving method of the third driving circuit (430) stored in the memory (510) or the camera module (400). According to one embodiment, the processor (520) can apply a driving voltage to the third driving circuit (430) based on the driving method of the third driving circuit (430).

[0140] The operations of the electronic device (501) described in the drawings below may be performed by the processor (520). However, for convenience of explanation, the operations performed by the processor (520) will be described as being performed by the electronic device (501).

[0141] The operations of the electronic device (501) described in the drawings below may also be performed by the camera module (400) (e.g., control circuit (440)). However, for convenience of explanation, the operations performed by the processor (520) will be described as being performed by the camera module (400) (e.g., control circuit (440)) or the electronic device (501).

[0142] FIG. 6 is a graph for explaining the maximum value of current flowing in a coil according to one embodiment.

[0143] Referring to FIG. 6, the vertical axis of the graph may represent a current value flowing in a coil (e.g., the first coil (411), the second coil (421), or the third coil (431) of FIG. 4) included in a driving circuit (e.g., the first driving circuit (410), the second driving circuit (420), or the third driving circuit (430) of FIG. 4). The horizontal axis of the graph may represent the time at which the current value was measured.

[0144] According to one embodiment, the electronic device (501) can turn on the power of the camera module (400) (e.g., the camera module (400) of FIG. 5).

[0145] In one embodiment, the electronic device (501) (e.g., the electronic device (501) of FIG. 5) may apply a voltage to a driving circuit using a determined driving method. In one embodiment, based on the voltage being applied to the driving circuit, a current may flow in the coil.

[0146] According to one embodiment, the electronic device (501) can determine the maximum value (A) of the current flowing in the coil. At this time, the maximum value (A) of the current can represent the maximum value of the current when the number of turns of the coil is 1.

[0147] According to one embodiment, the electronic device (501) can determine the number of turns of the coil.

[0148] According to one embodiment, the electronic device (501) can determine the maximum current value as the product of the maximum value (A) of the current flowing in the coil and the number of turns of the coil.

[0149] FIG. 7A is a flowchart illustrating an operation of an electronic device determining a driving method of at least one driving circuit according to one embodiment.

[0150] Referring to FIG. 7a, at least one driving method of at least one driving circuit can be set at the product design stage of an electronic device (501) (e.g., electronic device (501) of FIG. 5) or a camera module (400) (e.g., camera module (400) of FIG. 5).

[0151] Below, an operation of setting a driving method of at least one driving circuit by an electronic device (501) is described.

[0152] According to one embodiment, in operation 711, the electronic device (501) (e.g., the electronic device (501) of FIG. 5) may turn on the power of the camera module (400) (e.g., the camera module (400) of FIG. 5).

[0153] According to one embodiment, in operation 713, the electronic device (501) may determine a value related to noise between at least one driving circuit and the image sensor (402) (e.g., the image sensor (402) of FIG. 4 ). For example, the at least one driving circuit may include a first driving circuit (410) (e.g., the first driving circuit (410) of FIG. 4 ), a second driving circuit (420) (e.g., the second driving circuit (420) of FIG. 4 ), or a third driving circuit (430) (e.g., the third driving circuit (430) of FIG. 4 ). However, this is an example, and the at least one driving circuit may not be limited thereto.

[0154] According to one embodiment, a value related to noise between at least one driving circuit and the image sensor (402) may represent a value obtained by dividing the maximum current value flowing in each coil of at least one driving circuit by the square of the distance between each coil and the image sensor (402).

[0155] For example, a value related to noise between the first driving circuit (410) and the image sensor (402) may represent a value obtained by dividing the maximum current value flowing through the first coil (411) of the first driving circuit (410) (e.g., the first coil (411) of FIG. 4) by the square of the distance between the first coil (411) and the image sensor (402).

[0156] For example, a value related to noise between the second driving circuit (420) and the image sensor (402) may represent a value obtained by dividing the maximum current value flowing through the second coil (421) of the second driving circuit (420) (e.g., the second coil (421) of FIG. 4) by the square of the distance between the second coil (421) and the image sensor (402).

[0157] For example, a value related to noise between the third driving circuit (430) and the image sensor (402) may be represented by a value obtained by dividing the maximum current value flowing through the third coil (431) of the third driving circuit (430) (e.g., the third coil (431) of FIG. 4) by the square of the distance between the third coil (431) and the image sensor (402).

[0158] According to one embodiment, in operation 715, the electronic device (501) can set a driving method of at least one driving circuit.

[0159] According to one embodiment, based on a value related to noise between at least one driving circuit and the image sensor (402) being greater than a specified value, the driving method of at least one driving circuit can be set to a linear driving method.

[0160] According to one embodiment, the driving method of at least one driving circuit may be set to a PWM (pulse width modulation) method based on the value related to noise between at least one driving circuit and the image sensor (402) being not greater than a specified value.

[0161] According to one embodiment, the specified value may include a value related to noise of the image sensor (402). According to one embodiment, the specified value may represent a value at which it is determined that noise of the image sensor (402) does not occur because the influence of the magnetic field generated by the electromagnetic force of the coil and the magnet does not reach the image sensor (402) when the driving circuit is driven in a PWM manner. For example, the specified value may be 500 (mA / mm 2 ) can be represented. For example, the specified value is 441 (mA / mm 2 ) can be represented. However, this is an example, and the specified value may include various numerical values. The specified value may be set by the user or automatically set by the electronic device (501).

[0162] According to one embodiment, if the electronic device (501) determines that a value related to noise between at least one driving circuit and the image sensor (402) is not greater than a specified value, the electronic device (501) may determine that when the at least one driving circuit is driven in a PWM manner, the influence of the magnetic field generated by the electromagnetic force of each coil and each magnet (412) of the at least one driving circuit does not reach the image sensor (402), and thus noise is not generated by the image sensor (402). According to one embodiment, the electronic device (501) may determine that when the value related to noise between at least one driving circuit and the image sensor (402) is determined to be greater than a specified value, the influence of the magnetic field reaches the image sensor (402) when the at least one driving circuit is driven in a PWM manner, and thus noise is generated by the image sensor (402).

[0163] According to one embodiment, the electronic device (501) can associate the driving method set for at least one driving circuit with each of the at least one driving circuit and store it in the memory (510) (e.g., the memory (510) of FIG. 5) or the camera module (400).

[0164] According to one embodiment, the electronic device (501) may determine that a magnetic field caused by an electromagnetic force of each coil and each magnet of the at least one driving circuit will not affect the image sensor (402) even if the at least one driving circuit is driven in a PWM (pulse width modulation) manner based on determining that a value related to noise between the at least one driving circuit and the image sensor (402) is not greater than a specified value. Through this, according to one embodiment, a current consumed by a driving circuit driven in a PWM manner among the at least one driving circuit may be relatively smaller than a current consumed by a driving circuit driven in a linear manner among the at least one driving circuit.

[0165] According to one embodiment, the electronic device (501) may determine that noise is generated in the image sensor (402) based on a magnetic field generated by an electromagnetic force of each coil and each magnet of the at least one driving circuit when the at least one driving circuit is driven in a PWM manner based on a determination that a value related to noise between the at least one driving circuit and the image sensor (402) is greater than a specified value. According to one embodiment, the electronic device (501) may determine that noise is generated in the image sensor (402) based on a magnetic field generated by an electromagnetic force of each coil and each magnet of the at least one driving circuit. According to one embodiment, the electronic device (501) may determine that noise is generated in the image sensor (402) based on a determination that a value related to noise between the at least one driving circuit and the image sensor (402) is greater than a specified value. Through this, according to one embodiment, noise in the image sensor (402) may not be generated.

[0166] In one embodiment, the electronic device (501) is described as performing the operations, but the operations may also be performed by the camera module (400) (e.g., the control circuit (440)).

[0167] FIG. 7b is a flowchart illustrating an operation of an electronic device setting a driving method of at least one driving circuit according to one embodiment.

[0168] Referring to FIG. 7b, at least one driving method of at least one driving circuit can be set at the product design stage of the electronic device (501) (e.g., the electronic device (501) of FIG. 5) or the camera module (400) (e.g., the camera module (400) of FIG. 5).

[0169] Below, an operation of setting a driving method of at least one driving circuit by an electronic device (501) (e.g., the electronic device (501) of FIG. 5) is described.

[0170] According to one embodiment, in operation 731, the electronic device (501) may turn on power to the camera module (400).

[0171] According to one embodiment, at operation 733, the electronic device (501) may determine a first value related to noise between the first driving circuit (410) (e.g., the first driving circuit (410) of FIG. 4) and the image sensor (402) (e.g., the image sensor (402) of FIG. 4). For example, the first value may represent a value obtained by dividing a maximum current value flowing in the first coil (411) (e.g., the first coil (411) of FIG. 4) by the square of a distance between the first coil (411) and the image sensor (402). For example, the maximum current value flowing in the first coil (411) may be determined based on a resistance value of the first coil (411), a voltage applied to the first driving circuit (410), and a number of turns of the first coil (411).

[0172] According to one embodiment, at operation 735, the electronic device (501) may determine a second value related to noise between the second driving circuit (420) (e.g., the second driving circuit (420) of FIG. 4) and the image sensor (402). For example, the second value may represent a value obtained by dividing a maximum current value flowing in the second coil (421) (e.g., the second coil (421) of FIG. 4) by the square of a distance between the second coil (421) and the image sensor (402). For example, the maximum current value flowing in the second coil (421) may be determined based on a resistance value of the second coil (421), a voltage applied to the second driving circuit (420), and a number of turns of the second coil (421).

[0173] According to one embodiment, in operation 737, the electronic device (501) can compare the first value and the second value to set the driving method of the first driving circuit (410) and the driving method of the second driving circuit (420).

[0174] According to one embodiment, if the electronic device (501) determines that the first value is smaller than the second value, the electronic device (501) can set the driving method of the first driving circuit (410) to the PWM method and set the driving method of the second driving circuit (420) to the linear method.

[0175] According to one embodiment, the electronic device (501) can associate the driving method set in the first driving circuit (410) and the second driving circuit (420) with the first driving circuit (410) and the second driving circuit (420), respectively, and store them in the memory (510) (e.g., the memory (510) of FIG. 5) or the camera module (400).

[0176] In one embodiment, the electronic device (501) is described as performing the operations, but the operations may also be performed by the camera module (400) (e.g., the control circuit (440)).

[0177] FIG. 8 is a flowchart illustrating an operation of an electronic device driving at least one driving circuit according to a preset driving method, according to one embodiment.

[0178] Referring to FIG. 8, according to one embodiment, in operation 810, an electronic device (501) (e.g., the electronic device (501) of FIG. 5) may turn on power to a camera module (400) (e.g., the camera module (400) of FIG. 5).

[0179] According to one embodiment, in operation 813, the electronic device (501) can check (or determine) the driving method of a preset first driving circuit (410) (e.g., the first driving circuit (410) of FIG. 5) and the driving method of a preset second driving circuit (420) (e.g., the second driving circuit (420) of FIG. 5).

[0180] According to one embodiment, the driving method of the first driving circuit (410) may be stored in the memory (510) (e.g., the memory (510) of FIG. 5) or the camera module (400) (e.g., the memory (250) of FIG. 2). According to one embodiment, the driving method of the second driving circuit (420) may be stored in the memory (510) or the camera module (400). For example, the electronic device (501) may read the stored preset driving methods to check the driving method of the first driving circuit (410) and the driving method of the second driving circuit (420).

[0181] According to one embodiment, in operation 815, the electronic device (501) may drive the first driving circuit (410) according to the identified driving method. For example, the electronic device (501) may apply a driving voltage to the first driving circuit (410) according to the identified driving method.

[0182] According to one embodiment, in operation 817, the electronic device (501) may drive the second driving circuit (420) according to the identified driving method. For example, the electronic device (501) may apply a driving voltage to the second driving circuit (420) according to the identified driving method.

[0183] In one embodiment, the electronic device (501) is described as performing the operations, but the operations may also be performed by the camera module (400).

[0184] FIG. 9 is a flowchart illustrating an operation of an electronic device to determine a specified value related to noise of an image sensor, according to one embodiment.

[0185] Referring to FIG. 9, according to one embodiment, in operation 913, the electronic device (501) (e.g., the electronic device (501) of FIG. 5) can check the distance between the image sensor (402) (e.g., the image sensor (402) of FIG. 4) and a coil (e.g., the first coil (411), the second coil (421), or the third coil (431) of FIG. 4) included in the driving circuit (e.g., the first driving circuit (410), the second driving circuit (420), or the third driving circuit (430) of FIG. 4).

[0186] According to one embodiment, in operation 915, the electronic device (501) can determine the maximum current value flowing in the coil. For example, the maximum current value can be determined based on the driving voltage applied to the driving circuit, the resistance value of the coil, and the number of turns of the coil. For example, the maximum current value can represent a value obtained by multiplying the voltage divided by the resistance value by the number of turns of the coil.

[0187] According to one embodiment, at operation 917, the electronic device (501) may set a designated value related to noise of the image sensor (402) corresponding to the maximum current value divided by the square of the distance.

[0188] According to one embodiment, the greater the distance between the image sensor (402) and the coil, and the smaller the maximum current flowing in the coil, the less the influence of the magnetic field generated by the magnet and the coil on the image sensor (402).

[0189] According to one embodiment, the electronic device (501) can set a designated value at which it is determined that the influence of the magnetic field does not affect the image sensor (402) even when the driving circuit is driven in a PWM manner. For example, the designated value is 441 (mA / mm 2 ) or 500(mA / mm 2 ) can be represented. However, this is an example, and the specified value may not be limited thereto.

[0190] According to one embodiment, if the electronic device (501) determines that the maximum current value divided by the square of the distance is not greater than a specified value, even if the driving circuit is driven in a PWM manner, the influence of the magnetic field does not reach the image sensor (402), and thus noise is not generated by the image sensor (402). At this time, the electronic device (501) may determine the driving method of the driving circuit to be the PWM method.

[0191] According to one embodiment, if the electronic device (501) determines that the value obtained by dividing the maximum current value by the square of the distance is greater than a specified value, when the driving circuit is driven in a PWM manner, the influence of the magnetic field is exerted on the image sensor (402), and noise is generated by the image sensor (402). At this time, the electronic device (501) may determine the driving method of the driving circuit in a linear manner.

[0192] FIG. 10 is a drawing schematically showing the structure of a camera module according to one embodiment.

[0193] Referring to FIG. 10, according to one embodiment, a camera module (1000) (e.g., the camera module (400) of FIG. 4, the camera module (400) of FIG. 5) may include a lens assembly (1003) (e.g., the lens assembly (403) of FIG. 4), a first driving circuit (1012, 1011) (e.g., the first driving circuit (410) of FIG. 4), and a second driving circuit (1021a, 1022a, 1022b, 1021b) (e.g., the second driving circuit (420) of FIG. 4).

[0194] According to one embodiment, the camera module (1000) may be implemented as a direct-type camera module in which light incident on the lens assembly (1003) is not refracted but transmitted to an image sensor (not shown) (e.g., image sensor (402) of FIG. 4).

[0195] According to one embodiment, the first driving circuit (1011, 1012) may represent a driving circuit configured to move the lens assembly (1003) in a first axis direction (e.g., Z-axis) so that the camera module (1000) performs an AF (auto focus) function. According to one embodiment, the first driving circuit (1011, 1012) may include a first coil (1011) (e.g., the first coil (411) of FIG. 4) and a first magnet (1012) (e.g., the first magnet (412) of FIG. 4). According to one embodiment, when a driving voltage is applied to the first coil (1011), the first magnet (1012) may be moved in the first axis direction. At this time, the first coil (1011) may be placed at a fixed position.

[0196] According to one embodiment, the second driving circuit (1021a, 1022a, 1022b, 1021b) may represent a driving circuit configured to move the lens assembly (1003) in a second axis direction (e.g., X-axis) perpendicular to the first axis direction or in a third axis direction (e.g., Y-axis) perpendicular to the first and second axis directions so that the camera module (1000) performs an optical image stabilization (OIS) function.

[0197] In one embodiment, the second drive circuit (1021a, 1022a, 1022b, 1021b) may include a second coil (1021a, 1021b) (e.g., the second coil (421) of FIG. 4) and a second magnet (1022a, 1022b) (e.g., the second magnet (422) of FIG. 4). In one embodiment, the second drive circuit (1021a, 1022a, 1022b, 1021b) may include a second axis drive circuit (1021a, 1022a) configured to move the lens assembly (1003) in a second axis direction (e.g., the X-axis). According to one embodiment, the second drive circuit (1021a, 1022a, 1022b, 1021b) may include a third axis drive circuit (1022b, 1021b) configured to move the lens assembly (1003) in a third axis direction (e.g., Y axis).

[0198] According to one embodiment, the second axis drive circuit (1021a, 1022a) may include a second axis magnet (1022a) and a second axis coil (1021a). According to one embodiment, the third axis drive circuit (1022b, 1021b) may include a third axis magnet (1022b) and a third axis coil (1021b).

[0199] According to one embodiment, as a driving voltage is applied to the second axis coil (1021a), the second axis magnet (1022a) can be moved in the second axis direction (e.g., X-axis). At this time, the second axis coil (1021a) can be placed at a fixed position. According to one embodiment, as the second axis magnet (1022a) moves in the second axis direction (e.g., X-axis), the lens assembly (1003) can be moved in the second axis direction (e.g., X-axis).

[0200] According to one embodiment, as a driving voltage is applied to the third axis coil (1021b), the third axis magnet (1022b) can be moved in the third axis direction (e.g., Y axis). At this time, the third axis coil (1021b) can be positioned at a fixed position. According to one embodiment, as the third axis magnet (1022b) moves in the third axis direction (e.g., Y axis), the lens assembly (1003) can be moved in the third axis direction (e.g., Y axis).

[0201] FIG. 11 is a diagram showing the distance between a camera module and an image sensor according to one embodiment.

[0202] Referring to FIG. 11, according to one embodiment, the camera module (1000) (e.g., the camera module (1000) of FIG. 10, the camera module (400) of FIG. 4) may be implemented as a direct-type camera module.

[0203] According to one embodiment, the electronic device (501) (e.g., the electronic device (501) of FIG. 5) can determine a distance (R1) between an image sensor (1002) (e.g., the image sensor (402) of FIG. 4) and a first coil (1011) (e.g., the first coil (411) of FIG. 4). For example, the distance (R1) can represent a minimum distance between the center of the first coil (1011) and the image sensor (1002).

[0204] According to one embodiment, the electronic device (501) can determine the maximum current value flowing in the first coil (1011). For example, the maximum current value flowing in the first coil (1011) can be determined based on the driving voltage applied to the first coil (1011), the resistance of the first coil (1011), and the number of turns of the first coil (1011).

[0205] According to one embodiment, if the electronic device (501) determines that the maximum current value flowing in the first coil (1011) divided by the square of the distance (R1) is greater than a specified value, the electronic device (501) can determine the driving method of the first driving circuit (410) (e.g., the first driving circuit (410) of FIG. 4) in a linear manner. According to one embodiment, if the electronic device (501) determines that the maximum current value flowing in the first coil (1011) divided by the square of the distance (R1) is not greater than a specified value, the electronic device (501) can determine the driving method of the first driving circuit (410) in a PWM manner.

[0206] According to one embodiment, the electronic device (501) can determine a distance (R2) between the image sensor (1002) and the second axis coil (1021a) (e.g., the second coil (421) of FIG. 4, the second axis coil (1021a) of FIG. 10). For example, the distance (R2) can represent a minimum distance between the center of the second axis coil (1021a) and the image sensor (1002).

[0207] According to one embodiment, when the second axis coil (1021a) includes a coil composed of a plurality of loops, the minimum value among the minimum distances between the centers of each of the loops and the image sensor (1002) can be identified as the distance (R2). According to one embodiment, when the second axis coil (1021a) includes a coil composed of a plurality of loops, the average value among the minimum distances between the centers of each of the loops and the image sensor (1002) can also be identified as the distance (R2).

[0208] According to one embodiment, the electronic device (501) can determine the maximum current value flowing in the second axis coil (1021a). For example, the maximum current value flowing in the second axis coil (1021a) can be determined based on the driving voltage applied to the second axis coil (1021a), the resistance of the second axis coil (1021a), and the number of turns of the second axis coil (1021a).

[0209] According to one embodiment, if the electronic device (501) determines that the maximum current value flowing in the second axis coil (1021a) divided by the square of the distance (R2) is greater than a specified value, the electronic device (501) can determine the driving method of the second axis drive circuit (1021a, 1022a) in a linear manner. According to one embodiment, if the electronic device (501) determines that the maximum current value flowing in the second axis coil (1021a) divided by the square of the distance (R2) is not greater than a specified value, the electronic device (501) can determine the driving method of the second axis drive circuit (1021a, 1022a) in a PWM manner.

[0210] According to one embodiment, the electronic device (501) can determine a distance (R3) between the image sensor (1002) and the third-axis coil (1021b) (e.g., the second coil (421) of FIG. 4, the third-axis coil (1021b) of FIG. 10). For example, the distance (R2) can represent a minimum distance between the center of the third-axis coil (1021b) and the image sensor (1002).

[0211] According to one embodiment, when the third axis coil (1021b) includes a coil composed of a plurality of loops, the average value of the minimum distances between the centers of each of the loops and the image sensor (1002) can be identified as the distance (R3). When the third axis coil (1021b) includes a plurality of loops, the minimum value among the minimum distances between the centers of each of the loops and the image sensor (1002) can also be identified as the distance (R3).

[0212] According to one embodiment, the electronic device (501) can determine the maximum current value flowing in the third axis coil (1021b). For example, the maximum current value flowing in the third axis coil (1021b) can be determined based on the driving voltage applied to the third axis coil (1021b), the resistance of the third axis coil (1021b), and the number of turns of the third axis coil (1021b).

[0213] According to one embodiment, if the electronic device (501) determines that the maximum current value flowing in the third axis coil (1021b) divided by the square of the distance (R3) is greater than a specified value, the electronic device (501) can determine the driving method of the third axis drive circuit (1022b, 1021b) in a linear manner. According to one embodiment, if the electronic device (501) determines that the maximum current value flowing in the third axis coil (1021b) divided by the square of the distance (R3) is not greater than a specified value, the electronic device (501) can determine the driving method of the third axis drive circuit (1022b, 1021b) in a PWM manner.

[0214] FIG. 12A is a drawing schematically showing the structure of a camera module according to one embodiment.

[0215] Referring to FIG. 12A, according to one embodiment, a camera module (1200) (e.g., the camera module (400) of FIG. 4) may include a lens assembly (1203) (e.g., the lens assembly (403) of FIG. 4), a reflective member (1230), an image sensor (1202) (e.g., the image sensor (402) of FIG. 4), a first driving circuit (1221a, 1222a) (e.g., the first driving circuit (410) of FIG. 4), and a second driving circuit (1211, 1212, 1221b, 1222b) (e.g., the second driving circuit (420) of FIG. 4). According to one embodiment, the camera module (400) may be implemented as a folded camera in which light reflected or refracted through the reflective member (1230) is transmitted to the image sensor (1202).

[0216] According to one embodiment, the first driving circuit (1221a, 1222a) and / or the second driving circuit (1211, 1212, 1221b, 1222b) may be accommodated (or disposed) in a carrier (or housing) of the camera module (1200). For example, the reflective member (1230) may be disposed between the lens assembly (1203) and the carrier. However, this is an example, and the arrangement structure of the reflective member (1230) may not be limited thereto.

[0217] According to one embodiment, a shield can (1210) may be coupled to the housing of the camera module (1200) to protect internal components of the camera module (1200).

[0218] According to one embodiment, the first drive circuit (1221a, 1222a) may include a first magnet (1222a) (e.g., the first magnet (412) of FIG. 4) and a first coil (1221a) (e.g., the first coil (411) of FIG. 4). According to one embodiment, the second drive circuit (1211, 1212, 1221b, 1222b) may include a second coil (1211, 1221b) (e.g., the second coil (421) of FIG. 4) and a second magnet (1212, 1222b) (e.g., the second magnet (422) of FIG. 4). For example, the second coil (1211, 1221b) may include a first axis coil (1211) and a third axis coil (1221b). For example, the second magnet (1212, 1222b) may include a first axis magnet (1212) and a third axis magnet (1222b).

[0219] According to an embodiment, the first coil (1221a) and the second coil (1211, 1221b) may be placed on a flexible printed circuits board (FPCB).

[0220] According to one embodiment, a driving voltage may be applied to the first coil (1221a). For example, the driving voltage may be applied to the first coil (1221a) in a linear manner or a PWM manner.

[0221] In one embodiment, the first magnet (1222a) can move in the second axis direction (e.g., X-axis) by an electromagnetic force based on electromagnetic interaction with the first coil (1221a). In one embodiment, the lens assembly (1203) can move based on the movement of the first magnet (1222a) in the second axis direction. Through this, the camera module (1200) can perform an AF function.

[0222] According to one embodiment, a driving voltage may be applied to the second coil (1211, 1221b). For example, the driving voltage may be applied to the second coil (1211, 1221b) in a linear manner or a PWM manner.

[0223] According to one embodiment, the first axis magnet (1212) can move in the first axis direction (e.g., the Z-axis) by an electromagnetic force based on an electromagnetic interaction with the first axis coil (1211) disposed in a direction opposite to the first axis magnet (1212). According to one embodiment, based on the movement of the first axis magnet (1212) in the first axis direction (e.g., the Z-axis), the reflective member (1230) can move in the first axis direction (e.g., the Z-axis). Alternatively, according to one embodiment, based on the movement of the first axis magnet (1221b) in the first axis direction (e.g., the Z-axis), the reflective member (1230) can rotate about the first axis direction (e.g., the Z-axis). That is, the reflective member (1230) can rotate about the first axis direction (e.g., the Z-axis) as a rotational axis. Through this, the camera module (1200) can perform an OIS function to compensate for the position of the camera module (1200) in the third axis direction (e.g., Y axis).

[0224] According to one embodiment, the third axis magnet (1222b) can move in the third axis direction (e.g., Y axis) by an electromagnetic force based on an electromagnetic interaction with a third axis coil (1221b) disposed in a direction opposite to the third axis magnet (1222b). According to one embodiment, based on the movement of the third axis magnet (1222b) in the third axis direction (e.g., Y axis), the reflective member (1230) can move or rotate in the third axis direction (e.g., Y axis). Alternatively, according to one embodiment, based on the movement of the third axis magnet (1222b) in the third axis direction (e.g., Y axis), the reflective member (1230) can rotate about the third axis direction (e.g., Y axis). That is, the reflective member (1230) can rotate about the third axis direction (e.g., Y axis) as a rotational axis. Through this, the camera module (1200) can perform an OIS function to compensate for the position of the camera module (1200) in the second axis direction (e.g., X-axis).

[0225] FIG. 12b is a diagram showing the distance between a camera module and an image sensor according to one embodiment.

[0226] Referring to FIG. 12b, the camera module (1200) (e.g., the camera module (1200) of FIG. 12, the camera module (400) of FIG. 4) may be implemented as a folded camera module.

[0227] According to one embodiment, the electronic device (501) (e.g., the electronic device (501) of FIG. 5) can determine a distance (R4) between the image sensor (1202) (e.g., the image sensor (402) of FIG. 4) and the first coil (1221a) (e.g., the first coil (411) of FIG. 4, the first coil (1221a) of FIG. 12). For example, the distance (R4) can represent a minimum distance between the center of the first coil (1221a) and the image sensor (1202).

[0228] According to one embodiment, the electronic device (501) can determine the maximum current value flowing in the first coil (1221a). For example, the maximum current value flowing in the first coil (1221a) can be determined based on the driving voltage applied to the first coil (1221a), the resistance of the first coil (1221a), and the number of turns of the first coil (1221a).

[0229] According to one embodiment, if the electronic device (501) determines that the maximum current flowing in the first coil (1221a) divided by the square of the distance (R4) is greater than a specified value, the electronic device (501) may set the driving method of the first driving circuit (410) (e.g., the first driving circuit (410) of FIG. 4) to a linear method. According to one embodiment, if the electronic device (501) determines that the maximum current flowing in the first coil (1221a) divided by the square of the distance (R4) is not greater than a specified value, the electronic device (501) may set the driving method of the first driving circuit (410) to a PWM method. According to one embodiment, if the electronic device (501) determines that the maximum current flowing in the first coil (1221a) divided by the square of the distance (R4) is greater than a specified value, the electronic device (501) may set the driving method of the first driving circuit (410) to a linear method.

[0230] According to one embodiment, the electronic device (501) can determine a distance (R5) between the image sensor (1202) and the first axis coil (1211) (e.g., the first axis coil (1211) of FIG. 12). For example, the distance (R5) can represent a minimum distance between the center of the first axis coil (1211) and the image sensor (1202).

[0231] According to one embodiment, the electronic device (501) can determine the maximum current value flowing in the first axis coil (1211). For example, the maximum current value flowing in the first axis coil (1211) can be determined based on the driving voltage applied to the first axis coil (1211), the resistance of the first axis coil (1211), and the number of turns of the first axis coil (1211).

[0232] According to one embodiment, if the electronic device (501) determines that the maximum current value flowing in the first axis coil (1211) divided by the square of the distance (R5) is greater than a specified value, the electronic device (501) can set the driving method of the second driving circuit (420) to a linear method. According to one embodiment, if the electronic device (501) determines that the maximum current value flowing in the first axis coil (1211) divided by the square of the distance (R5) is not greater than a specified value, the electronic device (501) can set the driving method of the second driving circuit (420) to a PWM method.

[0233] According to one embodiment, the electronic device (501) can determine a distance (R6) between the image sensor (1202) and the third axis coil (1221b) (e.g., the third axis coil (1221b) of FIG. 12). For example, the distance (R6) can represent a minimum distance between the center of the third axis coil (1221b) and the image sensor (1202).

[0234] According to one embodiment, the electronic device (501) can determine the maximum current value flowing in the third axis coil (1221b). For example, the maximum current value flowing in the third axis coil (1221b) can be determined based on the driving voltage applied to the third axis coil (1221b), the resistance of the third axis direction coil (1221b), and the number of turns of the third axis coil (1221b).

[0235] According to one embodiment, if the electronic device (501) determines that the maximum current flowing in the third axis coil (1221b) divided by the square of the distance (R6) is greater than a specified value, the electronic device (501) may set the driving method of the third driving circuit (430) to a linear method. According to one embodiment, if the electronic device (501) determines that the maximum current flowing in the third axis coil (1221b) divided by the square of the distance (R6) is not greater than a specified value, the electronic device (501) may set the driving method of the third driving circuit (430) to a PWM method.

[0236] FIG. 13 is a drawing schematically showing the structure of a camera module according to one embodiment.

[0237] Referring to FIG. 13, according to one embodiment, a camera module (1300) (e.g., camera module (400) of FIG. 4) may be implemented as a folded camera module that supports continuous optical zoom.

[0238] According to one embodiment, the camera module (1300) may include an image sensor (1310) (e.g., image sensor (402) of FIG. 4), a first lens assembly (1320) (e.g., lens assembly (403) of FIG. 4), a second lens assembly (1340) (e.g., lens assembly (403) of FIG. 4), and a third lens assembly (1330) (e.g., lens assembly (403) of FIG. 4).

[0239] According to one embodiment, the third lens assembly (1330) can be moved in at least one axial direction (e.g., a second axial direction (e.g., X-axis)) to perform a zoom function for adjusting a zoom ratio. For example, the third lens assembly (1330) can be moved in at least one axial direction (e.g., a second axial direction (e.g., X-axis)) by an electromagnetic force between at least one coil (1360) and at least one magnet (1350).

[0240] According to one embodiment, the first lens assembly (1320) can be moved in at least one axial direction to enable the camera module (1300) to perform the OIS function. Depending on the implementation, the camera module (1300) may further include a reflective member, such that the reflective member can be moved or rotated in at least one axial direction to enable the camera module (1300) to perform the OIS function.

[0241] According to one embodiment, the second lens assembly (1340) can be moved in at least one axial direction to enable the camera module (1300) to perform an AF function.

[0242] The structure of the camera module (1300) may not be limited to the structure illustrated in FIG. 13. The number of lens assemblies, the number of magnets, and the number of coils may not be limited to the configurations illustrated in FIG. 13.

[0243] FIG. 14 is a diagram illustrating a magnetic flux for explaining the relationship between a magnetic field generated by a coil and noise of an image sensor based on a distance between the coil and the image sensor included in a driving circuit according to one embodiment.

[0244] Referring to FIG. 14, according to one embodiment, the camera module (1000) (e.g., the camera module (400) of FIG. 4, the camera module (1000) of FIG. 10) may be implemented as a direct-type camera module.

[0245] According to one embodiment, the distance at which the magnetic field generated by the first coil (1011) (e.g., the first coil (411) of FIG. 4, the first coil (1011) of FIG. 10) affects the image sensor (1002) (e.g., the image sensor (402) of FIG. 4, the image sensor (1002) of FIG. 10)) may represent r1.

[0246] According to one embodiment, the distance at which the magnetic field generated by the second coil (1021a, 1021b) (e.g., the second coil (421) of FIG. 4, the second coil (1021a, 1021b) of FIG. 10) affects the image sensor (1002) may represent r1.

[0247] In one embodiment, the distance from the center of the first coil (1011) to the image sensor (1002) may represent r2, which is less than r1. In one embodiment, the distance from the center of the second coil (1021a, 1021b) to the image sensor (1002) may represent r2, which is less than r1.

[0248] According to one embodiment, the electronic device (501) (e.g., the electronic device (501) of FIG. 5) may determine that when the first driving circuit (410) (e.g., the first driving circuit (410) of FIG. 4) is driven in a PWM manner, the image sensor (402) will be affected by the magnetic field generated by the first coil (1011) and thus generate noise.

[0249] According to one embodiment, the electronic device (501) may determine that when the second driving circuit (420) (e.g., the second driving circuit (420) of FIG. 4) is driven in a PWM manner, the image sensor (402) will be affected by the magnetic field generated by the second coil (1021a, 1021b) and thus generate noise.

[0250] According to one embodiment, the electronic device (501) can determine the driving method of the first driving circuit (410) and the second driving circuit (420) in a linear manner.

[0251] FIG. 15 is a diagram illustrating a magnetic flux for explaining the relationship between a magnetic field generated by a coil and noise of an image sensor based on a distance between the coil and the image sensor included in a driving circuit according to one embodiment.

[0252] Referring to FIG. 15, according to one embodiment, the camera module (1000) (e.g., the camera module (400) of FIG. 4, the camera module (1200) of FIG. 12) may be implemented as a folded camera module.

[0253] According to one embodiment, the distance at which the magnetic field generated by the first coil (1221a) (e.g., the first coil (411) of FIG. 4, the first coil (1221a) of FIG. 12) affects the image sensor (1202) (e.g., the image sensor (402) of FIG. 4, the image sensor (1202) of FIG. 12)) may represent r3.

[0254] According to one embodiment, the distance from the center of the first coil (1221a) to the image sensor (1202) may represent r4, which is greater than r3.

[0255] According to one embodiment, the electronic device (501) (e.g., the electronic device (501) of FIG. 5) may determine that the image sensor (402) will not be affected by the magnetic field generated by the first coil (1221a) when the first driving circuit (410) (e.g., the first driving circuit (410) of FIG. 4) is driven in a PWM manner.

[0256] According to one embodiment, the electronic device (501) can determine the driving method of the first driving circuit (410) as a PWM method.

[0257] Although not shown in FIG. 15, according to one embodiment, since the distance between the second coil (1211, 1221b) (e.g., the second coil (1211, 1221b) of FIG. 12) and the image sensor (402) is greater than r4, the driving method of the second driving circuit (420) (e.g., the second driving circuit (420) of FIG. 4) can be determined as the PWM method.

[0258] FIG. 16 is a flowchart illustrating an operation of an electronic device according to one embodiment of the present invention to determine a driving method of a first driving circuit, a driving method of a second driving circuit, and a driving method of a third driving circuit.

[0259] Referring to FIG. 16, according to one embodiment, a camera module (400) (e.g., the camera module (400) of FIG. 4) may be implemented as a folded camera in which light reflected or refracted through a reflective member is transmitted to an image sensor (402) (e.g., the image sensor (402) of FIG. 4). According to one embodiment, a lens assembly (403) (e.g., the lens assembly (403) of FIG. 4) may include a first lens assembly, a second lens assembly, and a third lens assembly. According to one embodiment, the camera module (400) may support continuous optical zoom that executes a zoom function that adjusts a zoom magnification by moving the third lens assembly.

[0260] According to one embodiment, in operation 1611, the electronic device (501) (e.g., the electronic device (501) of FIG. 5) can check (or determine) a first driving method of a first driving circuit (410) (e.g., the first driving circuit (410) of FIG. 4), a second driving method of a second driving circuit (420) (e.g., the second driving circuit (420) of FIG. 4), and a third driving method of a third driving circuit (e.g., the third driving circuit (430) of FIG. 4).

[0261] For example, the electronic device (501) can read a first driving method that is preset in response to a first driving circuit (410) stored in a memory (510) (e.g., the memory (510) of FIG. 5). For example, the electronic device (501) can read a second driving method that is preset in response to a second driving circuit (420) stored in the memory (510). For example, the electronic device (501) can read a third driving method that is preset in response to a third driving circuit (430) stored in the memory (510).

[0262] According to one embodiment, if the first value corresponding to the value obtained by dividing the first maximum current value flowing in the first coil (411) (e.g., the first coil (411) of FIG. 4) by the square of the first distance between the first coil (411) and the image sensor (402) (e.g., the image sensor (402) of FIG. 4) is greater than a specified value, the first driving method may be preset as a linear method. For example, if the first value is not greater than the specified value, the first driving method may be preset as a PWM method. According to one embodiment, the first maximum current value may represent a value obtained by dividing the value obtained by multiplying the voltage applied to the first driving circuit (410) by the number of turns of the first coil (411) by the first resistance value of the first coil (411). For example, the first distance may represent a minimum distance between the center of the first coil (411) and the image sensor (402).

[0263] According to one embodiment, if the second value corresponding to the value obtained by dividing the second maximum current value flowing in the second coil (421) (e.g., the second coil (421) of FIG. 4) by the square of the second distance between the second coil (421) and the image sensor (402) is greater than a specified value, the second driving method may be preset as a linear method. For example, if the second value is not greater than the specified value, the second driving method may be preset as a PWM method. According to one embodiment, the second maximum current value may represent a value obtained by dividing the value obtained by multiplying the voltage applied to the second driving circuit (420) by the number of turns of the second coil (421) by the second resistance value of the second coil (421). For example, the second distance may represent a minimum distance between the center of the second coil (421) and the image sensor (402).

[0264] According to one embodiment, if a third value corresponding to a value obtained by dividing a third maximum current value flowing in the third coil (431) (e.g., the third coil (431) of FIG. 4) by the square of a third distance between the third coil (431) and the image sensor (402) is greater than a specified value, the third driving method may be preset as a linear method. For example, if the third value is not greater than the specified value, the third driving method may be preset as a PWM method. According to one embodiment, the third maximum current value may represent a value obtained by dividing a value obtained by multiplying a voltage applied to the third driving circuit (430) by the number of turns of the third coil (431) by a third resistance value of the third coil (431). For example, the third distance may represent a minimum distance between the center of the third coil (431) and the image sensor (402).

[0265] According to one embodiment, in operation 1613, the electronic device (501) may apply a driving voltage to the first driving circuit (410) using the determined driving method to move the first lens assembly in the first axis direction so that the camera module (400) performs the AF function. For example, the first axis direction may include the optical axis direction.

[0266] According to one embodiment, in operation 1615, the electronic device (501) may apply a driving voltage to the second driving circuit (420) using the determined driving method to move the reflective member so that the camera module (400) performs the OIS function. For example, the second axis direction may include a direction perpendicular to the optical axis. For example, the reflective member may change the path of light received from the second lens assembly one or more times.

[0267] According to one embodiment, in operation 1617, the electronic device (501) may apply a driving voltage to the third driving circuit (430) using the determined driving method to move the third lens assembly so that the camera module (400) performs a zoom function that adjusts the zoom ratio. For example, the third lens assembly may move in the first axis direction.

[0268] In one embodiment, the electronic device (501) is described as performing the operations, but the operations may be performed by the camera module (400).

[0269] According to one embodiment, in a method of operating a camera module, the camera module includes an image sensor, a first lens assembly, and a first drive circuit including a first coil and a first magnet, wherein the first drive circuit can be configured to move the first lens assembly in at least one axial direction.

[0270] According to one embodiment, a method of operating a camera module may include applying a driving voltage to the first driving circuit according to a linear driving method based on a first maximum current value flowing in the first coil and a first value related to noise of the image sensor based on a first distance between the first coil and the image sensor being greater than a specified value.

[0271] According to one embodiment, in a method of operating a camera module, an operation of applying the driving voltage to the first driving circuit according to a PWM (pulse width modulation) method may be included based on the first value being not greater than the specified value.

[0272] According to one embodiment, in the operating method of the camera module, the first maximum current value may be determined based on the first resistance value of the first coil, the driving voltage applied to the first driving circuit, and the number of turns of the first coil.

[0273] According to one embodiment, in the method of operating the camera module, the first value may represent a value obtained by dividing the first maximum current value by the square of the first distance.

[0274] According to one embodiment, in the method of operating the camera module, the specified value is 500 mA / mm 2 can be expressed.

[0275] According to one embodiment, in the operating method of the camera module, the first distance between the first coil and the image sensor may include a minimum distance between the center position of the first coil and the image sensor.

[0276] According to one embodiment, in a method of operating a camera module, the first magnet is moved as the driving voltage is applied to the first driving circuit, and wherein the first coil can be placed at a fixed position.

[0277] According to one embodiment, in a method of operating a camera module, the camera module may further include a second driving circuit including a second coil and a second magnet, and may include an operation of applying the driving voltage to the second driving circuit according to a linear driving method based on a second maximum current value flowing in the second coil and a second distance between the second coil and the image sensor being greater than a designated value, and an operation of applying the driving voltage to the second driving circuit according to a PWM (pulse width modulation) method based on the second value not being greater than the designated value.

[0278] According to one embodiment, a method of operating a camera module may include applying the driving voltage to the first driving circuit to move the first lens assembly in a first axial direction among at least one axial direction to perform an AF (auto focus) function, and applying the driving voltage to the second driving circuit to move the first lens assembly in a second axial direction perpendicular to the first axial direction among the at least one axial directions or in a third axial direction perpendicular to the first axial direction and the second axial direction to perform an OIS (optical image stabilization) function.

[0279] According to one embodiment, in a method of operating a camera module, the camera module may include a reflective member disposed between a carrier that accommodates the second driving circuit and the first lens assembly, and changing a path of light received through the first lens assembly at least once.

[0280] According to one embodiment, a method of operating a camera module may include applying the driving voltage to the second driving circuit to move the reflective member in at least one axial direction to perform an optical image stabilization (OIS) function.

[0281] According to one embodiment, in a method of operating a camera module, the camera module may further include a second lens assembly, and a third driving circuit including a third coil and a third magnet, and an operation of applying the driving voltage to the third driving circuit so as to move the second lens assembly to perform a zoom function of adjusting a zoom magnification.

[0282] According to one embodiment, a camera module includes an image sensor, a first lens assembly, a control circuit, and at least one driving circuit, wherein the at least one driving circuit can be configured to move the first lens assembly in at least one axial direction.

[0283] According to one embodiment, in the camera module, the control circuit can apply a driving voltage to the at least one driving circuit according to a PWM (pulse width modulation) method.

[0284] According to one embodiment, in the camera module, a maximum current value flowing in each coil included in the at least one driving circuit and a value related to noise of the image sensor based on a distance between each coil and the image sensor may be less than or equal to a specified value.

[0285] According to one embodiment, in the camera module, the maximum current value flowing through each coil can be determined based on a resistance value of each coil, a voltage applied to the at least one driving circuit, and the number of turns of each coil.

[0286] According to one embodiment, in the camera module, the value based on the maximum current value flowing in each coil and the distance between each coil and the image sensor may represent a value obtained by dividing the maximum current value flowing in each coil by the square of the distance between each coil and the image sensor.

[0287] According to one embodiment, in the camera module, the specified value is 500 mA / mm 2 can be expressed.

[0288] According to one embodiment, in the camera module, the distance between each coil and the image sensor may include a minimum distance between the image sensor and a center position of each coil.

[0289] According to one embodiment, in the camera module, each magnet included in the at least one driving circuit moves as the driving voltage is applied to the at least one driving circuit, wherein each coil can be placed at a fixed position.

[0290] According to one embodiment, a camera module includes an image sensor, a first lens assembly, a control circuit, and a plurality of drive circuits including a first drive circuit including a first magnet and a first coil and a second drive circuit including a second magnet and a second coil, wherein at least some of the plurality of drive circuits can be configured to move the first lens assembly in at least one axial direction.

[0291] According to one embodiment, in the camera module, the control circuit can apply a driving voltage to the first driving circuit according to a PWM (pulse width modulation) method and apply the driving voltage to the second driving circuit according to a linear method.

[0292] According to one embodiment, in the camera module, a first value related to noise of the image sensor based on a first maximum current value flowing in the first coil and a first distance between the first coil and the image sensor may be less than a second maximum current value flowing in the second coil and a second value related to noise of the image sensor between the second coil and the image sensor.

[0293] According to one embodiment, in the camera module, the first maximum current value may be determined based on a first resistance value of the first coil, a voltage applied to the first driving circuit, and a number of turns of the first coil, and the second maximum current value may be determined based on a second resistance value of the second coil, a voltage applied to the second driving circuit, and a number of turns of the second coil.

[0294] According to one embodiment, in the camera module, the first value may represent a value obtained by dividing the first maximum current value by the square of the first distance, and the second value may represent a value obtained by dividing the second maximum current value by the square of the second distance.

[0295] According to one embodiment, in the camera module, the specified value is 500 mA / mm 2 can be expressed.

[0296] According to one embodiment, the camera module may further include a reflective member disposed between the carrier accommodating the second driving circuit and the first lens assembly, the reflective member changing the path of light received through the first lens assembly at least once.

[0297] According to one embodiment, in the camera module, the control circuit may be configured to apply the driving voltage to the second driving circuit to move the reflective member in the at least one axial direction to perform an optical image stabilization (OIS) function.

[0298] Electronic devices according to the various embodiments disclosed in this document may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to the embodiments disclosed in this document are not limited to the aforementioned devices.

[0299] The various embodiments of this document and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. 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 this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0300] The term "module" used in various 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. 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).

[0301] Various embodiments of the present document may be implemented as software (e.g., program (140)) including one or more commands stored in a storage medium (e.g., built-in memory (136) or external memory (138)) readable by a machine (e.g., electronic device (101, 501)). For example, a processor (e.g., processor (120, 520)) of a machine (e.g., electronic device (101, 501)) 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 called at least one command. 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' means a device in which the storage medium is tangible, It simply means that it 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 a storage medium.

[0302] According to one embodiment, the method according to various embodiments disclosed in this document 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., smart phones), 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.

[0303] 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.

Claims

1. In the operating method of the camera module, The camera module comprises an image sensor, a first lens assembly, and a first driving circuit including a first coil and a first magnet, wherein the first driving circuit is configured to move the first lens assembly in at least one axial direction, The method of operation of the above camera module is: An operation of applying a driving voltage to the first driving circuit according to a linear driving method based on a first maximum current value flowing in the first coil and a first value related to noise of the image sensor based on a first distance between the first coil and the image sensor being greater than a specified value; and A method of operating a camera module, including an operation of applying the driving voltage to the first driving circuit according to a PWM (pulse width modulation) method, based on the first value being not greater than the specified value.

2. In the first paragraph, the first maximum current value is, An operating method of a camera module determined based on a first resistance value of the first coil, the driving voltage applied to the first driving circuit, and the number of turns of the first coil.

3. In any one of paragraphs 1 and 2, the first value is, A method of operating a camera module, wherein the first maximum current value is expressed as a value divided by the square of the first distance.

4. In any one of paragraphs 1 to 3, the specified value is: 500mA / mm 2 A method of operation of a camera module representing a .

5. In any one of paragraphs 1 to 4, the first distance between the first coil and the image sensor is A method of operating a camera module including a minimum distance between the image sensor and the center position of the first coil.

6. A method of operating a camera module according to any one of claims 1 to 5, wherein the first magnet is moved as the driving voltage is applied to the first driving circuit, and wherein the first coil is disposed at a fixed position.

7. In any one of paragraphs 1 to 6, Further comprising a second driving circuit (420) including a second coil (421) and a second magnet (422), The method of operation of the above camera module is: An operation of applying the driving voltage to the second driving circuit according to the linear driving method based on a second maximum current value flowing in the second coil and a second value based on a second distance between the second coil and the image sensor being greater than the specified value; and A method of operating a camera module further comprising an operation of applying the driving voltage to the second driving circuit according to the PWM (pulse width modulation) method based on the second value being not greater than the specified value.

8. In any one of paragraphs 1 to 7, An operation of applying the driving voltage to the first driving circuit to move the first lens assembly in a first axial direction among at least one axial directions to perform an AF (auto focus) function; and A method of operating a camera module further comprising applying the driving voltage to the second driving circuit to move the first lens assembly in a second axial direction perpendicular to the first axial direction or a third axial direction perpendicular to the first axial direction and the second axial direction among the at least one axial directions to perform an OIS (optical image stabilization) function.

9. In any one of paragraphs 1 to 8, the camera module, A second driving circuit (420) including a second coil (421) and a second magnet (422); and Further comprising a reflective member disposed between the carrier accommodating the second driving circuit and the first lens assembly, the reflective member changing the path of light received through the first lens assembly at least once; The method of operation of the above camera module is: A method of operating a camera module further comprising applying the driving voltage to the second driving circuit to move the reflective member in the at least one axial direction to perform an OIS (optical image stabilization) function.

10. In any one of clauses 1 to 9, the camera module, a second lens assembly (403); and Further comprising a third driving circuit (430) including a third coil (431) and a third magnet (432), The method of operation of the above camera module is: A method of operating a camera module further comprising applying the driving voltage to the third driving circuit to move the second lens assembly to perform a zoom function for adjusting a zoom ratio.

11. In the camera module (400), Image sensor (402); First lens assembly; control circuit; and comprising at least one drive circuit, wherein the at least one drive circuit is configured to move the first lens assembly in at least one axial direction; The above control circuit, Applying a driving voltage to at least one driving circuit according to the PWM (pulse width modulation) method, A camera module wherein a value related to noise of the image sensor based on a maximum current value flowing in each coil included in at least one of the driving circuits and a distance between each of the coils and the image sensor is less than or equal to a specified value.

12. In the 11th paragraph, the maximum current value flowing through each coil is A camera module determined based on the resistance value of each coil, the driving voltage applied to the at least one driving circuit, and the number of turns of each coil.

13. In any one of paragraphs 11 to 12, The value based on the maximum current flowing in each of the above coils and the distance between each of the above coils and the image sensor is, A camera module that represents the maximum current value flowing in each of the above coils divided by the square of the distance between each of the above coils and the image sensor.

14. In the camera module (400), Image sensor (402); First lens assembly; control circuit; and A plurality of drive circuits including a first drive circuit including a first magnet and a first coil and a second drive circuit including a second magnet and a second coil, wherein at least some of the plurality of drive circuits are set to move the first lens assembly in at least one axial direction, The above control circuit, A driving voltage is applied to the first driving circuit according to the PWM (pulse width modulation) method, and the driving voltage is applied to the second driving circuit according to the linear method. A camera module wherein a first value related to noise of the image sensor based on a first maximum current value flowing in the first coil and a first distance between the first coil and the image sensor is smaller than a second value related to noise of the image sensor based on a second maximum current value flowing in the second coil and a second distance between the second coil and the image sensor.

15. In the 14th paragraph, the first maximum current value is, is determined based on the first resistance value of the first coil, the voltage applied to the first driving circuit, and the number of turns of the first coil, The above second maximum current value is, A camera module determined based on the second resistance value of the second coil, the driving voltage applied to the second driving circuit, and the number of turns of the second coil.

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