Control device, image capturing device, accessory, camera system, control method, and program

Abstract

To provide a control device capable of reducing electromagnetic noise caused by driving of an actuator.SOLUTION: A control device provided herein is used for a camera system comprising an accessory including a drive unit, and an image capturing unit configured to allow the accessory to be removably attached thereto, the control device comprising an acquisition unit for acquiring image capturing environment information and a control unit for controlling the drive unit in accordance with the image capturing environment information.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a control device, an imaging device, an accessory, a camera system, a control method, and a program. [Background technology]

[0002] Patent Document 1 discloses a configuration for controlling a lens device so as to reduce stripe noise. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-127445 Summary of the Invention [Problem to be solved by the invention]

[0004] Pulse width modulation control, one method for controlling actuators, is effective in saving power, but the high-frequency components of the drive signal tend to generate electromagnetic noise from the circuit board pattern and the actuator itself. When photographing aircraft, radios are sometimes used to capture aircraft movements in advance, but if electromagnetic noise gets mixed into the radio, it becomes impossible to intercept conversations between aircraft. The configuration described in Patent Document 1 cannot reduce electromagnetic noise.

[0005] An object of the present invention is to provide a control device that can reduce electromagnetic noise caused by driving an actuator. [Means for solving the problem]

[0006] A control device as one aspect of the present invention is a control device used in a camera system that has an accessory including a drive unit and an imaging device to which the accessory can be attached or detached, and is characterized by having an acquisition unit that acquires shooting environment information and a control unit that controls the drive unit in accordance with the shooting environment information. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a control device that can reduce electromagnetic noise caused by driving an actuator. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a block diagram of a camera system according to a first embodiment. [Figure 2] 1 is a cross-sectional view of an image stabilization device according to a first embodiment. [Figure 3] FIG. 1 is a diagram showing the output of a motor driver IC. [Figure 4] FIG. 2 is a cross-sectional view of the camera system. [Figure 5] 3 is a flowchart showing a method for controlling an actuator according to the first embodiment. [Figure 6] FIG. 10 is a diagram showing an example of wireless communication allocated frequencies for each airport and peak frequencies of electromagnetic noise for each lens device. [Figure 7] 10 is a flowchart showing a method for controlling an actuator according to a second embodiment. [Figure 8] FIG. 10 is a diagram showing an example of a condition for changing the control of the actuator. [Figure 9] 10 is a flowchart showing a method for controlling an actuator according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same reference numerals are used to designate the same components, and redundant explanations will be omitted. [Example]

[0010] FIG. 1 is a block diagram of a camera system according to this embodiment. The camera system includes a lens device (hereinafter referred to as an interchangeable lens) 100 and an imaging device (hereinafter referred to as a camera body) 200 to which the interchangeable lens 100 is detachably and communicably attached. The present invention is applicable not only to interchangeable lens camera systems, but also to lens-integrated imaging devices (digital still cameras, video cameras, etc.). While this embodiment describes the control of an actuator (drive unit) mounted on the interchangeable lens 100, the present invention can also be applied to any accessory that has an actuator. Examples of accessories include accessories provided between the interchangeable lens 100 and the camera body 200, accessories provided on the interchangeable lens 100, and accessories provided on the camera body 200.

[0011] The interchangeable lens 100 includes a photographic optical system. The photographic optical system includes, arranged in this order from the object side to the image side, a fixed front lens 101, a variable magnification lens 102, an aperture 103, an image stabilization lens 104, and a focus lens 105. Note that although each lens is shown in FIG. 1 to be made up of a single lens element, in reality each lens includes one or more lens elements.

[0012] The variable magnification lens 102 moves in the optical axis direction when the zoom ring is rotated and the cam ring rotates. By changing the spacing between adjacent lens groups, it becomes possible to take photographs at focal lengths ranging from wide angle to telephoto. The amount of rotation of the zoom ring is detected by a sensor (not shown). The variable magnification lens 102 may move in the optical axis direction and change magnification as a zoom movable member (hereinafter referred to as an actuator) constituted by a stepping motor, DC motor, or the like is driven.

[0013] The aperture (driven member) 103 can change its opening diameter in response to the driving of an aperture actuator 106, which is composed of a stepping motor, a DC motor, or the like. An aperture driving circuit 107 supplies a driving voltage and current to the aperture actuator 106. The light amount adjusting device 116 is made up of the aperture 103, the aperture actuator 106, and the aperture driving circuit 107.

[0014] Image stabilization lens (driven member) 104 moves in a shift direction as image stabilization actuator 108, which is configured from a stepping motor, voice coil motor, etc., is driven, thereby performing image stabilization. Image stabilization drive circuit 109 supplies drive voltage and current to image stabilization actuator 108. Image stabilization device 117 consists of image stabilization lens 104, image stabilization actuator 108, and image stabilization drive circuit 109.

[0015] A focus lens (driven member) 105 moves in the optical axis direction as a focus actuator 110, which is configured from a stepping motor, a voice coil motor, an ultrasonic motor, etc., is driven, thereby performing focus adjustment. A focus drive circuit 111 supplies a drive voltage and current to the focus actuator 110. A focus adjustment device 118 is made up of the focus lens 105, the focus actuator 110, and the focus drive circuit 111.

[0016] When the interchangeable lens 100 is attached to the camera body 200, electrical contacts 113a, 113b, and 113c provided on the interchangeable lens 100 are connected to electrical contacts 207a, 207b, and 207c provided on the camera body 200, respectively. This enables communication of various information between the interchangeable lens 100 and the camera body 200. While FIG. 1 shows a case where three-wire serial communication is performed, the present invention is not limited to this. In this embodiment, the lens control CPU 112 and the camera control CPU 206 perform serial communication with the camera control CPU 206 as the clock master.

[0017] Furthermore, a power supply contact (not shown) provided on the interchangeable lens 100 is connected to a power supply contact (not shown) provided on the camera body 200. As a result, power from a secondary battery (not shown), such as a lithium ion battery, mounted on the camera body 200 is converted to a desired voltage by a power supply circuit, such as a DC-DC converter, and supplied to various sensors, the lens control CPU 112, and various drive circuits within the interchangeable lens 100.

[0018] The camera body 200 includes an image sensor 201 as a photoelectric conversion element configured by a CCD sensor or a CMOS sensor. The image sensor 201 photoelectrically converts an optical image (subject image) formed by a photographing optical system. The electric charge accumulated in the image sensor 201 by photoelectric conversion is output as an image signal (analog signal) at a predetermined timing and input to a video signal processing circuit 202.

[0019] The video signal processing circuit 202 converts the analog signal from the image sensor 201 into a digital signal and performs various signal processing such as amplification and gamma correction on the digital signal to generate a video signal. The video signal is output to a camera control CPU 206, a display device 205 configured with a liquid crystal display panel or the like, and a storage device 204 configured with an optical disk, semiconductor memory or the like.

[0020] The video signal processing circuit 202 also includes an AF signal processing circuit 203 as a focus information generation unit. The AF signal processing circuit 203 extracts high-frequency components and luminance components obtained by a group of pixels in an AF area, which is a focus detection area, from the image pickup signal output from the image sensor 201 (or a video signal generated using the image pickup signal), and generates a focus evaluation value signal as focus information. The focus evaluation value signal indicates the contrast state (image pickup contrast), or in other words, sharpness, of the image, and changes as the focus lens 105 moves. The focus position at which the value of the focus evaluation value signal, or in other words, the focus evaluation value, is maximum (peak), is the in-focus position in that AF area.

[0021] The ISO sensitivity adjustment unit 211 is implemented in the camera control CPU 206 and mainly determines the ISO sensitivity. The ISO sensitivity adjustment unit 211 determines the ISO sensitivity based on the output value of a photometry unit (AE) (not shown) that measures the amount of light received from a subject.

[0022] The lens control CPU 112 includes a lens communication unit 114. The lens communication unit 114 communicates with the camera control CPU 206 via electrical contacts 113a, 113b, and 113c and electrical contacts 207a, 207b, and 207c. The lens control CPU 112 controls various actuators included in the interchangeable lens 100 via corresponding drive circuits based on instructions from the camera control CPU 206. The various actuators included in the interchangeable lens 100 are driven by a control method such as a pulse width modulation control method (PWM control method, digital control method) or a linear control method (DC control method, analog control method).

[0023] The camera control CPU 206 includes a camera communication unit 208, an acquisition unit 209, and a control unit 210. The camera communication unit 208 communicates with the lens communication unit 114 via electrical contacts 113a, 113b, and 113c and electrical contacts 207a, 207b, and 207c, and transmits instructions to the lens control CPU 112 of the control unit 210. The control unit 210 controls the actuators according to shooting environment information. In this embodiment, the control unit 210 controls the actuators based on whether the scene requires the use of a wireless device. Note that, although the camera control CPU 206 functions as a control device that controls the actuators in this embodiment, the present invention is not limited to this. The actuators may be controlled by the lens control CPU 112 or the entire camera system. Alternatively, they may be controlled by a device separate from the camera system.

[0024] The following describes the configuration of image stabilization device 117. Figure 2 is a cross-sectional view of image stabilization device 117 excluding image stabilization drive circuit 109.

[0025] The first yoke 401 is made of a magnetic material and is fixed to the base plate 403 with screws. The first drive magnet 402 is a permanent magnet made of a neodymium magnet and is fixed to the first yoke 401 by magnetic attraction through an opening in the base plate 403. The lens barrel 404 holds the image stabilization lens 104, which includes lenses L11 and L12. Camera shake can be corrected by moving the image stabilization lens 104 in a direction that includes a component perpendicular to the optical axis. A coil 405 is fixed to the lens barrel 404. A first guide plate 406 is also fixed to the lens barrel 404 with screws. The second guide plate 407 is supported on the base plate 403 via a first rolling ball (not shown) so as to be movable in the pitch axis direction. The lens barrel 404 is supported on the second guide plate 407 via a second rolling ball (not shown) so as to be movable in the yaw axis direction. Furthermore, the lens barrel 404 is supported on the base plate 403 via a third rolling ball (not shown) so as to be movable in a direction perpendicular to the optical axis.

[0026] The second drive magnet 409 is positioned by a protrusion provided on the second yoke 408 and fixed to the second yoke 408 by magnetic attraction. The second yoke 408 is fixed to the first yoke 401 by a magnetic attraction force generated between the first drive magnet 402 and the second drive magnet 409, with the support pinched between them. The first drive magnet 402 and the second drive magnet 409 are arranged to face the coil 405. A Lorentz force is generated in the first drive magnet 402 and the second drive magnet 409 by passing a current through the coil 405. When the Lorentz force is generated, the lens barrel 404 moves in a direction that includes a component perpendicular to the optical axis. The coil 405, the first drive magnet 402, and the second drive magnet 409 are each arranged in two orthogonal directions. Therefore, the lens barrel 404 can be freely moved within a predetermined range in directions including a component perpendicular to the optical axis by the combined force of the driving forces in the two directions.

[0027] Electromagnetic noise will be described below. Fig. 3 shows waveforms indicating the output voltage and current when the actuator is driven by a motor driver IC (drive board) mounted on the drive circuit in the interchangeable lens 100 using a pulse width modulation control method.

[0028] When the actuator is driven at high speed, the output voltage of the motor driver IC experiences abrupt rises and falls, causing ringing noise as shown in Fig. 3(a1). This causes large current fluctuations as shown in Fig. 3(a2), and when image stabilization is performed by the image stabilization device 117, fluctuations in the magnetic field that are generated when a current is passed through the coil 405 are radiated around the interchangeable lens 100 as electromagnetic noise.

[0029] On the other hand, the output voltage of a motor driver IC with a low slew rate rises and falls slowly, resulting in less ringing noise as shown in Fig. 3(b1).As a result, the current fluctuation is small as shown in Fig. 3(b2), and electromagnetic noise is not emitted around the interchangeable lens 100.

[0030] If electromagnetic noise is mixed into a radio, it will be impossible to receive external radio waves. Therefore, in situations where a radio is used, it is necessary to implement electromagnetic noise reduction control to suppress ringing noise and reduce electromagnetic noise. In this embodiment, when it is determined based on shooting environment information that a radio will be used to anticipate aircraft movements when photographing an aircraft, the control unit 210 implements electromagnetic noise reduction control. Examples of electromagnetic noise reduction control include control that reduces the slew rate at the rise of the output voltage of a motor driver IC mounted in a drive circuit within the interchangeable lens 100, or control using a linear control method that is less likely to generate ringing noise. Examples of shooting environment information include shooting location detection information, wireless communication detection information, and subject detection information. For example, when the shooting location is determined to be an airport using detection information (shooting location detection information) from a GPS mounted in the interchangeable lens 100 or the camera body 200, electromagnetic noise reduction control is implemented. Furthermore, when it is determined that the radio frequency is within the range used for aviation communications using detection information (wireless communication detection information) from a frequency detection circuit mounted in the interchangeable lens 100 or the camera body 200, electromagnetic noise reduction control is implemented. Furthermore, when the subject is recognized as an airplane using subject detection information from the camera body 200, electromagnetic noise reduction control is executed.

[0031] Although the above description is given of the case where the shooting location detection information, wireless communication detection information, and subject detection information are used when determining whether to implement electromagnetic noise reduction control, the present invention is not limited to this. The sound of an aircraft, or information directly input by the user that the user is at an airport or that the user is currently photographing an aircraft may also be used.

[0032] In addition, in this embodiment, electromagnetic noise reduction control is performed by reducing the slew rate at the rise of the motor driver IC output voltage and by using a linear control method, but the present invention is not limited to this. In situations where the image or usability is not affected, power supply to the actuator may be stopped to stop driving, or the drive range may be limited to reduce the power supply.

[0033] 4(a) and 4(b) are cross-sectional views of the camera system when the interchangeable lens 100 is in a wide-angle state and a telephoto state, respectively. The light amount adjustment device 116, the image stabilization device 117, and the focus adjustment device 118 move along the optical axis when the zoom ring is rotated and the cam ring rotates. In the light amount adjustment device 116, the image stabilization device 117, and the focus adjustment device 118, actuators are controlled by a control board 119 including a lens control CPU 112.

[0034] 5 is a flowchart showing the actuator control method of this embodiment. This flow is executed by the camera control CPU 206.

[0035] In step S101, the acquisition unit 209 acquires the image capturing environment information. As described above, the image capturing environment information includes, for example, image capturing location detection information, wireless communication detection information, and subject detection information.

[0036] In step S102, the control unit 210 determines whether the scene is one in which a wireless device is used, based on the shooting environment information. If the control unit 210 determines that the scene is not one in which a wireless device is used, it executes the process of step S103, and if the control unit 210 determines that the scene is one in which a wireless device is used, it executes the process of step S104.

[0037] In step S103, the control unit 210 controls the actuator under normal control (first control). Specifically, the control unit 210 transmits an instruction to control the actuator under normal control to the lens control CPU 112 via the camera communication unit 208 and the lens communication unit 114. The lens control CPU 112 controls the actuator based on the received instruction to move the driven member.

[0038] In step S104, control unit 210 controls the actuator under electromagnetic noise reduction control (second control) which generates less electromagnetic noise than normal control. Specifically, control unit 210 transmits an instruction to control the actuator under electromagnetic noise reduction control to lens control CPU 112 via camera communication unit 208 and lens communication unit 114. Lens control CPU 112 controls the actuator based on the received instruction to move the driven member.

[0039] The electromagnetic noise reduction control is, for example, a control that reduces the slew rate of the output voltage of the motor driver IC compared to normal control, or a control that controls the actuator using a second control method that generates less electromagnetic noise than the first control method of normal control. For example, the first control method is a pulse width modulation control method, and the second control method is a linear control method.

[0040] In this embodiment, the actuator is driven under electromagnetic noise reduction control for only a predetermined time. For example, the actuator is driven under electromagnetic noise reduction control while the lens control CPU 112 receives a flag indicating an instruction to control under electromagnetic noise reduction control from the control unit 210. Furthermore, the actuator may be driven under electromagnetic noise reduction control until the power of the camera body 200 is turned off.

[0041] As described above, the configuration of this embodiment makes it possible to reduce electromagnetic noise caused by driving the actuator. [Example]

[0042] In the first embodiment, a case where an actuator is controlled based only on the image capturing environment information has been described, but in the present embodiment, a case where an actuator is controlled based on the image capturing environment information as well as the unique information of an accessory will be described. The configuration of the camera system in this embodiment is the same as that of the camera system in the first embodiment. In this embodiment, only the configuration different from that in the first embodiment will be described, and a description of the similar configuration will be omitted.

[0043] In this embodiment, the acquisition unit 209 acquires information specific to the interchangeable lens 100 in addition to the imaging environment information. The control unit 210 acquires the wireless communication allocated frequency of the airport based on the imaging environment information, and also acquires the peak frequency of electromagnetic noise from the interchangeable lens 100 based on the unique information of the interchangeable lens 100. The control unit 210 controls the actuator based on whether the peak frequency of the electromagnetic noise is included in the wireless communication allocated frequency.

[0044] Figure 6 shows an example of the wireless communication frequencies allocated to each airport and the peak frequencies of electromagnetic noise for each lens device. Wireless communication frequencies are allocated to each airport. Furthermore, if the motor driver IC installed in the drive circuit or the material of the lens barrel exterior differs, the peak frequency at which electromagnetic noise is strongest will differ for each lens device.

[0045] In this embodiment, the control unit 210 determines whether the peak frequency of electromagnetic noise from the interchangeable lens 100 is included within the frequencies allocated for wireless communication at the airport. If the control unit 210 determines that the peak frequency of electromagnetic noise from the interchangeable lens 100 is included within the frequencies allocated for wireless communication at the airport, it performs electromagnetic noise reduction control.

[0046] For example, in FIG. 6, a case will be described in which the lens device being used is recognized as lens A based on the lens ID. In this case, if the shooting location is recognized as airport A based on the shooting environment information, the peak frequency of electromagnetic noise from lens A is included in the wireless communication allocated frequency range of airport A, and therefore electromagnetic noise reduction control is performed. Electromagnetic noise reduction control is also performed if the shooting location is recognized as airport B. However, if the shooting location is recognized as airport C, the peak frequency of electromagnetic noise from lens A is not included in the wireless communication allocated frequency range of airport C, and therefore electromagnetic noise reduction control is not performed.

[0047] 7 is a flowchart showing the actuator control method of this embodiment. This flow is executed by the camera control CPU 206.

[0048] In step S201, the acquisition unit 209 acquires shooting environment information. The acquisition unit 209 also acquires a lens ID, which is an example of information unique to the interchangeable lens 100, from the lens control CPU 112 via the lens communication unit 114 and the camera communication unit 208. While the acquisition unit 209 acquires the lens ID as information unique to the interchangeable lens 100, it may also acquire the peak frequency of electromagnetic noise from the interchangeable lens 100.

[0049] In step S202, the control unit 210 acquires the peak frequency of electromagnetic noise from the interchangeable lens 100 based on the lens ID. The peak frequency may be acquired from a storage unit (not shown) or a server on the cloud. The control unit 210 also acquires the wireless communication allocated frequency for each airport based on the shooting environment information. For example, if the shooting environment information is shooting location detection information, the wireless communication allocated frequency may be acquired from a storage unit (not shown) or a server on the cloud based on the airport where the shooting took place. If the shooting environment information is wireless communication detection information, the wireless communication allocated frequency may be acquired from a frequency detection circuit mounted on the interchangeable lens 100 or the camera body 200. The control unit 210 then determines whether the peak frequency of the electromagnetic noise from the interchangeable lens 100 is included within the wireless communication allocated frequency for the airport. If the control unit 210 determines that the peak frequency of the electromagnetic noise is not included within the wireless communication allocated frequency, it executes the process of step S203. If the control unit 210 determines that the peak frequency of the electromagnetic noise is included within the wireless communication allocated frequency, it executes the process of step S204.

[0050] The processing in steps S203 and S204 is similar to the processing in steps S103 and S104 in FIG. 5, and therefore a description thereof will be omitted.

[0051] As explained above, the configuration of this embodiment makes it possible to reduce electromagnetic noise caused by driving the actuator. Furthermore, because it is determined whether or not to perform electromagnetic noise reduction control depending on the configuration of the actual interchangeable lens 100 and the environment of the airport, it is possible to drive the actuator more appropriately than with the configuration of Example 1. [Example]

[0052] In this embodiment, an example of a method will be described in which the lens control CPU 112 drives various actuators based on a flag indicating whether or not the electromagnetic noise reduction control is to be performed (a flag indicating a control instruction for the electromagnetic noise reduction control) given by the control unit 210. Specifically, a flag indicating whether or not the electromagnetic noise reduction control is to be performed, given (acquired) at a first timing, is compared with a flag given at a second timing after the first timing, to determine whether or not the electromagnetic noise reduction control is to be performed. The configuration of the camera system of this embodiment is similar to that of the camera system of embodiment 1. In this embodiment, only the configuration different from embodiment 1 will be described, and a description of the similar configuration will be omitted. Whether or not the electromagnetic noise reduction control is to be performed is determined by the control unit 210 using the method of embodiment 1 or embodiment 2.

[0053] FIG. 8 shows an example of a condition for changing actuator control by comparing an already assigned flag (previous flag) with a currently assigned flag (current flag). In this embodiment, the control unit 210 assigns a first flag if the electromagnetic noise reduction control is to be performed, and assigns a second flag if the electromagnetic noise reduction control is not to be performed. The lens control CPU 112 compares the previous flag with the current flag. If the previous flag and the current flag are the same flag, or if the second flag is received when there is no previous flag, the current drive is continued without changing the control method. If there is no previous flag, or if the first flag is received when the previous flag is the second flag, the electromagnetic noise reduction control is executed. If the second flag is received when the previous flag is the first flag, the electromagnetic noise reduction control is terminated.

[0054] 9 is a flowchart showing the actuator control method of this embodiment. This flow is executed by the lens control CPU 112.

[0055] In step S301, the lens control CPU 112 acquires the current flag from the camera control CPU 206 (control unit 210) via the lens communication unit 114 and the camera communication unit 208. In this embodiment, the lens control CPU 112 functions as a flag acquisition unit.

[0056] In step S302, the lens control CPU 112 compares the previous flag with the current flag, and if the comparison result satisfies a predetermined condition, executes the processing of step S303; if not, executes the processing of step S304. A case where the predetermined condition is satisfied is when the previous flag does not exist, or when the first flag is received in a state where the previous flag is the second flag. A case where the predetermined condition is not satisfied is when the previous flag and the current flag are the same flag, or when the second flag is received in a state where the previous flag does not exist. In this embodiment, the lens control CPU 112 functions as a change unit.

[0057] In step S303, the lens control CPU 112 controls the actuator with electromagnetic noise reduction control.

[0058] In step S304, the lens control CPU 112 controls the actuator in the current control mode, that is, the control of the actuator in the current control mode is continued.

[0059] As described above, the configuration of this embodiment makes it possible to reduce electromagnetic noise caused by driving the actuator. [Other Examples] The present invention can also be realized by supplying a program that realizes one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and having one or more processors in the computer of the system or device read and execute the program. It can also be realized by a circuit (e.g., ASIC) that realizes one or more functions.

[0060] The disclosure of this embodiment includes the following configurations and methods. (Configuration 1) A control device used in a camera system including an accessory including a drive unit and an imaging device to which the accessory is detachable, an acquisition unit that acquires shooting environment information; a control unit that controls the drive unit in accordance with the image-capturing environment information; (Configuration 2) The control device according to configuration 1 is characterized in that the control unit determines whether the scene is one in which a radio will be used based on the shooting environment information, and if it determines that the scene is not one in which a radio will be used, controls the drive unit using a first control, and if it determines that the scene is one in which a radio will be used, controls the drive unit using a second control that generates less electromagnetic noise than the first control. (Configuration 3) the acquisition unit acquires unique information of the accessory; 2. The control device according to configuration 1, wherein the control unit controls the drive unit in accordance with the imaging environment information and the specific information. (Configuration 4) The control device according to configuration 3, characterized in that the control unit determines whether a peak frequency of electromagnetic noise from the accessory is included in the frequency of wireless communication at the airport based on the shooting environment information and the unique information, and if it determines that the peak frequency is not included in the frequency of wireless communication, controls the drive unit using a first control, and if it determines that the peak frequency is included in the frequency of wireless communication, controls the drive unit using a second control that generates less electromagnetic noise than the first control. (Configuration 5) the drive unit includes a drive substrate; 5. The control device according to any one of configurations 2 to 4, wherein the second control is a control that reduces the slew rate of the output voltage of the drive substrate compared to the first control. (Configuration 6) the first control is a control for controlling the drive unit using a first control method, The control device according to any one of configurations 2 to 4, characterized in that the second control is a control that controls the drive unit using a second control method that generates less electromagnetic noise than the first control method. (Configuration 7) the first control method is a pulse width modulation control method, 7. The control device according to configuration 6, wherein the second control method is a linear control method. (Configuration 8) 8. The control device according to any one of configurations 1 to 7, wherein the image-taking environment information includes at least one of image-taking location detection information, wireless communication detection information, and subject detection information. (Configuration 9) 9. The control device according to configuration 8, wherein the photography location detection information is information indicating whether the photography location is an airport. (Configuration 10) 10. The control device according to configuration 8 or 9, wherein the wireless communication detection information is information indicating whether wireless communication used in aviation communication is being used. (Configuration 11) 11. The control device according to any one of configurations 8 to 10, wherein the subject detection information is information indicating whether the subject is an airplane. (Configuration 12) The control device described in any one of configurations 2 to 7, characterized in that when the control unit controls the drive unit using the second control, the control unit sends a flag to the accessory indicating an instruction to control the drive unit using the second control. (Configuration 13) A control device according to any one of configurations 1 to 12; and an imaging element. (Configuration 14) A control device according to any one of configurations 1 to 12; An accessory comprising: a drive unit. (Configuration 15) The accessory described in configuration 14 is characterized in that the accessory is at least one of a lens device, an accessory arranged between an imaging device and a lens device, an accessory provided to the lens device, and an accessory provided to the imaging device. (Configuration 16) a flag acquisition unit that acquires, from the control device according to any one of configurations 1 to 12, a first flag indicating an instruction to control the drive unit under a first control and a second flag indicating an instruction to control the drive unit under a second control that generates less electromagnetic noise than the first control; and a change unit that changes the control of the drive unit to the second control when there is no flag acquired at a first timing, or when the flag acquired at the first timing is the first flag and the flag acquired at a second timing after the first timing is a second flag. (Configuration 17) The accessory described in configuration 16, wherein the drive unit is driven under the second control for a predetermined period of time. (Configuration 18) 18. The accessory of claim 16 or 17, wherein the drive unit is driven under the second control while the second flag is acquired. (Configuration 19) 19. The accessory according to any one of configurations 16 to 18, wherein the drive unit is driven under the second control until the power of the imaging device is turned off. (Configuration 20) The accessory described in any one of configurations 16 to 19 is characterized in that the accessory is at least one of a lens device, an accessory arranged between an imaging device and a lens device, an accessory provided on a lens device, and an accessory provided on an imaging device. (Configuration 21) A control device according to any one of configurations 1 to 12; An imaging element; A camera system comprising: a driving unit. (Method 1) A control method used in a camera system including an accessory including a drive unit and an imaging device to which the accessory is detachable, comprising: acquiring shooting environment information; a step of controlling the driving unit in accordance with the image-capturing environment information; (Configuration 22) A program that causes a computer to execute the control method described in Method 1.

[0061] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention. [Explanation of symbols]

[0062] 100 Lens equipment (accessories) 106 Aperture actuator (drive unit) 108 Image stabilization actuator (drive unit) 110 Focus actuator (drive unit) 200 Imaging device 206 Camera CPU (control device) 209 Acquisition Department 210 Control Unit

Claims

1. A control device used in a camera system including an accessory including a drive unit and an imaging device to which the accessory is detachable, an acquisition unit that acquires shooting environment information; a control unit that controls the drive unit in accordance with the image-capturing environment information;

2. The control device described in claim 1, characterized in that the control unit determines whether the scene is one in which a radio will be used based on the shooting environment information, and if it determines that the scene is not one in which a radio will be used, controls the drive unit using a first control, and if it determines that the scene is one in which a radio will be used, controls the drive unit using a second control that generates less electromagnetic noise than the first control.

3. the acquisition unit acquires unique information of the accessory; The control device according to claim 1 , wherein the control unit controls the drive unit in accordance with the image-capturing environment information and the specific information.

4. The control device described in claim 3, characterized in that the control unit determines whether a peak frequency of electromagnetic noise from the accessory is included in the frequency of wireless communication at the airport based on the shooting environment information and the unique information, and if it determines that the peak frequency is not included in the frequency of wireless communication, controls the drive unit using a first control, and if it determines that the peak frequency is included in the frequency of wireless communication, controls the drive unit using a second control that generates less electromagnetic noise than the first control.

5. the drive unit includes a drive substrate; 5. The control device according to claim 2, wherein the second control is a control for reducing a slew rate of the output voltage of the drive substrate compared to the first control.

6. the first control is control for controlling the drive unit using a first control method, 5. The control device according to claim 2, wherein the second control is a control for controlling the drive unit by a second control method that generates less electromagnetic noise than the first control method.

7. the first control method is a pulse width modulation control method, 7. The control device according to claim 6, wherein the second control method is a linear control method.

8. 5. The control device according to claim 1, wherein the image-taking environment information includes at least one of image-taking location detection information, wireless communication detection information, and subject detection information.

9. 9. The control device according to claim 8, wherein the photographing location detection information is information indicating whether the photographing location is an airport.

10. 9. The control device according to claim 8, wherein the wireless communication detection information is information indicating whether wireless communication used in aviation communication is being used.

11. 9. The control device according to claim 8, wherein the subject detection information is information indicating whether the subject is an airplane.

12. The control device described in claim 2 or 4, characterized in that when the control unit controls the drive unit using the second control, it sends a flag to the accessory indicating an instruction to control the drive unit using the second control.

13. A control device according to any one of claims 1 to 4; and an imaging element.

14. A control device according to any one of claims 1 to 4; An accessory comprising: a drive unit.

15. The accessory according to claim 14, wherein the accessory is at least one of a lens device, an accessory disposed between an imaging device and the lens device, an accessory provided on the lens device, and an accessory provided on the imaging device.

16. a flag acquiring unit that acquires, from the control device according to any one of claims 1 to 4, a first flag indicating an instruction to control the accessory under a first control and a second flag indicating an instruction to control the accessory under a second control that generates less electromagnetic noise than the first control; An accessory characterized by having a change unit that changes the control of the drive unit to the second control when there is no flag acquired at a first timing, or when the flag acquired at the first timing is the first flag and the flag acquired at a second timing after the first timing is a second flag.

17. The accessory according to claim 16, wherein the drive unit is driven under the second control for a predetermined period of time.

18. The accessory according to claim 16, wherein the driving unit is driven under the second control while the second flag is acquired.

19. 17. The accessory according to claim 16, wherein the drive unit is driven under the second control until the power of the imaging device is turned off.

20. The accessory according to claim 16, wherein the accessory is at least one of a lens device, an accessory disposed between an imaging device and the lens device, an accessory provided on the lens device, and an accessory provided on the imaging device.

21. A control device according to any one of claims 1 to 4; An imaging element; A camera system comprising: a driving unit.

22. A control method used in a camera system including an accessory including a drive unit and an imaging device to which the accessory is detachable, comprising: acquiring shooting environment information; a step of controlling the driving unit in accordance with the image-capturing environment information;

23. A program causing a computer to execute the control method according to claim 22.

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