JP2015001730A - Illuminating device, imaging apparatus, camera system, and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminating device which reduces damage caused by collision of the illuminating device to an obstacle when a radiation direction of the illuminating device is automatically changed.SOLUTION: An illuminating device comprises a light-emitting unit. When a movable unit held rotatably to a main body is automatically driven by driving means, rather than restricting the drive within a range where a rotation angle to a reference position of the movable unit does not exceed a threshold value, the drive within a range where the rotation angle exceeds the threshold value is restricted.

Description

  The present invention relates to drive control for changing the irradiation direction of a lighting device.

  2. Description of the Related Art Conventionally, flash photography (hereinafter referred to as bounce flash photography) is known in which light from a lighting device is irradiated toward a ceiling or the like and a subject is irradiated with diffuse reflected light from the ceiling or the like. According to the bounce flash photography, the subject can be irradiated with light from the illumination device indirectly instead of directly, so that it is possible to depict with soft light.

  Furthermore, a technique for automatically determining the optimum irradiation direction in bounce flash photography has been proposed. Patent Document 1 proposes a technique for performing light measurement at each light emission angle while irradiating flash light at a plurality of light emission angles, and calculating a light emission angle suitable for bounce shooting based on the obtained plurality of light measurement results. ing.

JP 2011-221364 A

  When the light emission angle is automatically changed in order to calculate a light emission angle suitable for bounce shooting as in the prior art disclosed in Patent Document 1, the light emission angle is calculated in a short time so as not to miss a photo opportunity. For this purpose, it is desirable to increase the drive speed of the flash 2. However, when the light emission angle is automatically changed, the flash 2 may collide with an obstacle when the light emission angle is changed, unlike when the user manually changes the light emission angle. The higher the drive speed of the flash 2, the greater the impact when the flash 2 collides with an obstacle, causing a problem that the flash 2 is damaged by the impact during the collision.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the damage of an illumination device that collides with an obstacle when the irradiation direction of the illumination device is automatically changed.

  In order to achieve the above object, an illumination device according to the present invention includes a light emitting unit, a movable unit that includes the light emitting unit and is rotatably held with respect to a main body unit, and a driving unit that drives the movable unit. And when the movable unit is automatically driven by the driving means, the driving in the range where the angle exceeds the threshold is performed rather than the driving in the range where the rotation angle of the movable unit with respect to the reference position does not exceed the threshold. Control means for limiting.

  ADVANTAGE OF THE INVENTION According to this invention, when changing the irradiation direction of an illuminating device automatically, it can reduce that an illuminating device collides with an obstruction and is damaged.

It is the schematic of the bounce light emission imaging | photography using the camera system concerning embodiment of this invention. It is a block diagram which shows schematic structure of the illuminating device which concerns on the 1st Embodiment of this invention. 1 is a block diagram illustrating a schematic configuration of an imaging apparatus according to a first embodiment of the present invention. It is a figure explaining the rotatable range with respect to the main-body part 200a of the movable part 200b of the strobe 200 in 1st Embodiment. It is a figure which shows the relationship between the drive speed of the movable part 200b in 2nd Embodiment, and drive time. It is a figure explaining the process in the drive part 207 at the time of switching the drive speed of the movable part 200b in 2nd Embodiment. FIG. 6 is a diagram illustrating drive control according to an elapsed time since the drive unit 207 received a drive instruction from the strobe control unit 201 last time.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(First embodiment)
First, bounce flash photography using the camera system according to the present embodiment will be described with reference to FIG. The camera system according to the present embodiment includes a camera 300 that is an imaging device, a strobe 200 that is an illumination device that can be attached to and detached from the camera 300, and a lens 5 that can be attached to and detached from the camera 300. The strobe 200 includes a main body portion 200a attached to the camera 300, and a movable portion 200b held so as to be rotatable in the vertical and horizontal directions with respect to the main body portion 200a. The mechanism that holds the movable part 200b so as to be rotatable in the vertical and horizontal directions with respect to the main body part 200a may be a known mechanism, for example, as disclosed in Japanese Patent Laid-Open Nos. 63-204238 and 2011-137960. Since the described mechanism may be used, detailed description is omitted.

  When performing bounce flash photography, the strobe 200 is caused to emit light with the irradiation direction directed toward the ceiling 101, and the subject 100 is irradiated with diffuse reflected light from the ceiling 101. In FIG. 1, an example in which bounce flash photography is performed by causing the strobe 200 to emit light with the irradiation direction in the direction of the ceiling 101 is described. However, a wall or a diffuse reflector located on the side of the subject 100 besides the ceiling. It is also possible to perform bounce flash photography toward the camera. In the following, a case where bounce flash photography is performed by causing the strobe 200 to emit light with the irradiation direction directed toward the ceiling 101 will be described.

  In the present embodiment, the irradiation direction of the strobe 200 when performing bounce flash photography is automatically determined, but the method for determining the irradiation direction is not particularly limited. For example, as in the method described in Japanese Patent Application Laid-Open No. 2011-221364, a method of determining based on a plurality of photometric results obtained by performing photometry in each irradiation direction while irradiating the strobe 200 in a plurality of irradiation directions, respectively. But you can. Alternatively, a method of determining based on the distance to the ceiling 101 and the distance to the subject 100 as in the method described in Japanese Patent Laid-Open No. 04-340527 may be used.

  Next, a schematic configuration of the strobe 200 will be described with reference to FIG. FIG. 2 is a block diagram showing a schematic configuration of the strobe 200.

  The strobe control unit 201 includes a CPU, a ROM, a RAM, and the like, and controls the operation of the strobe 200 as a whole. The battery 202 supplies power to each part of the strobe 200 under the control of the power supply circuit 203.

  The charging circuit 204 charges the main capacitor included in the light emitting circuit 205. The light emitting circuit 205 performs light emission control of the light emitting unit 206 using a Xe tube or the like as a light source in accordance with an instruction from the strobe control unit 201.

  The drive unit 207 controls the motor 208 in accordance with an instruction from the strobe control unit 201 to drive (rotate) the movable unit 200b in the vertical and horizontal directions with respect to the main body unit 200a. In addition, the drive unit 207 acquires drive information indicating a drive amount, a rotation angle, and the like from the reference position of the movable unit 200b by the encoder 209.

  The operation unit 210 includes an auto bounce switch for switching whether to execute auto bounce, a setting switch for setting a threshold value for switching the drive control of the movable unit 200b when automatically determining the irradiation direction during bounce flash photography. Is included. In addition, the operation unit 210 includes an automatic determination switch that starts an operation for automatically determining an irradiation direction during bounce flash photography, and the strobe control unit 201 moves the movable unit 200b when the automatic determination switch is operated. A drive instruction for driving is output to the drive unit 207.

  The connection unit 211 is provided with an attachment unit for attachment to the imaging device, a contact unit provided with a communication contact with the imaging device, and the strobe control unit 201 via the contact unit of the connection unit 211. Communicate with.

  The display unit 212 displays an image using a liquid crystal, an organic EL, or the like, and displays various settings of the strobe 200 and a menu screen for changing various settings.

  In addition, as long as the connection part 211 is provided in the main-body part 200a and the light emission part 206 is provided in the movable part 200b, the other part may be provided in either the main-body part 200a or the movable part 200b.

  Next, a schematic configuration of the camera 300 will be described with reference to FIG. FIG. 3 is a block diagram illustrating a schematic configuration of the camera 300.

  The camera control unit 301 includes a CPU, a ROM, a RAM, and the like, and controls the operation of the entire camera 300. The camera control unit 301 communicates various information with the strobe control unit 201 of the strobe 200 and the lens control unit (not shown) of the lens 5. The imaging unit 302 has an imaging element such as a CCD or a CMOS, and outputs image data of the captured subject.

  The image processing unit 303 performs various processes on the image data input from the imaging unit 302. The image data processed for image display by the image processing unit 303 is used for image display by the image display unit 304. The image display unit 304 can display not only a subject image but also a menu screen for performing various settings of the camera 300. The image data processed for storage by the image processing unit 303 is stored in an external storage device 305 such as an SD card.

  The focus detection unit 306 includes a line sensor such as a CCD including a field lens, a reflection mirror, a secondary imaging lens, a diaphragm, and a plurality of photoelectric conversion elements arranged in the vicinity of the imaging surface. The focus detection unit 306 according to the present embodiment is a known phase difference method, and can detect a focus at a distance measurement point using a plurality of areas in the observation screen (in the viewfinder field) as a distance measurement point. It is comprised so that it may become.

  The photometric unit 307 has a photometric sensor using an image sensor such as a CCD or a CMOS, and measures the subject and outputs a photometric value.

  Next, the rotatable range of the movable part 200b of the strobe 200 with respect to the main body part 200a will be described with reference to FIG.

  In the present embodiment, as shown in FIG. 4, the reference position of the movable part 200b with respect to the main body part 200a is a position where the central axis of the movable part 200b and the imaging optical axis of the imaging apparatus do not intersect when mounted on the imaging apparatus. It is said.

  When the user manually rotates the movable part 200b upward, since the possibility that the movable part 200b collides with an obstacle is low, the movable part 200b is allowed to rotate up to the maximum rotatable angle. On the other hand, when the movable part 200b is automatically rotated upward, the movable part 200b may collide with an obstacle. For example, in a state where the user holds the camera 300 and brings his / her face close to the camera 300, the movable part 200b may collide with the user's face if the movable part 200b is rotated to the maximum possible angle. . Therefore, in this embodiment, the strobe control unit 201 instructs the driving unit 207 to automatically rotate the movable unit 200b upward in order to determine the optimal irradiation direction for bounce flash photography. The movable range of the movable part 200b is limited. Specifically, when the movable unit 200b is automatically rotated upward, the movable unit 200b is not allowed to rotate up to the maximum rotatable angle, and the drive unit 207 has a predetermined threshold value. The movable part 200b is not rotated at a larger angle. Here, the maximum angle that can be turned when the movable portion 200b is automatically turned upward, which is a threshold, is AP, and the turning angle can be turned when the user manually turns the movable portion 200b upward. When the maximum angle is MP, the relationship AP ≦ MP is established.

  Note that the threshold value for restricting the upward rotation of the movable unit 200b may be a fixed value or an arbitrary value set by the user using the setting switch of the operation unit 210. Further, when the movable part 200b is manually turned upward by the user before the movable part 200b is automatically turned upward, the movable part 200b is automatically turned upward. It is considered that the possibility that the movable part 200b collides with an obstacle is low until the rotation angle. For this reason, the threshold value may be set according to the rotation angle manually set by the user before the movable portion 200b is automatically rotated upward.

  As described above, when the movable part 200b is automatically rotated upward, the movable part 200b is not automatically rotated to an angle larger than the threshold value. Therefore, the movable part 200b can be prevented from colliding with an obstacle and being damaged.

(Second Embodiment)
In the first embodiment, as an example in which the drive control is switched so as to limit the drive in the range where the rotation angle exceeds the threshold, rather than the drive in the range where the rotation angle of the movable portion 200b does not exceed the threshold, When turning automatically, it was made not to turn to an angle exceeding the threshold. Since the possibility of the movable part 200b colliding with an obstacle is reduced by restricting the rotatable range when the movable part 200b is automatically rotated as in the first embodiment, the movable part 200b It is possible to reduce damage by colliding with obstacles. On the other hand, in the second embodiment, the movable part 200b does not reduce the possibility of the movable part 200b colliding with the obstacle, but reduces the impact when the movable part 200b collides with the obstacle, thereby moving the movable part 200b. Reduces damage caused by collision with obstacles. Specifically, when the movable unit 200b is automatically rotated, if the movable unit 200b has a rotation angle at which there is a high possibility that the movable unit 200b will collide with an obstacle, the driving speed of the movable unit 200b is decreased, thereby moving the movable unit 200b. The impact when 200b collides with an obstacle is reduced. Note that the imaging apparatus and the illumination apparatus according to the present embodiment have the same configuration as the camera 300 and the strobe 200 described in the first embodiment, and thus detailed description thereof is omitted.

  Hereinafter, control of the driving speed of the movable part 200b will be described with reference to FIG. FIG. 5 is a diagram illustrating the relationship between the driving speed and the driving time of the movable part 200b when the movable part 200b is rotated from the reference position to the maximum angle at which the movable part 200b can be rotated. When the driving speed of the movable part 200b is set to a high speed (VH) so as not to miss a photo opportunity, the movable part 200b is rotated from the reference position to the maximum angle as shown in the upper part of FIG. The drive time for making it t1. However, when the driving speed of the movable part 200b is set to a high speed (VH), the impact when the movable part 200b collides with an obstacle is increased, so that the movable part 200b is easily damaged.

  On the other hand, when the driving speed of the movable part 200b is set to a slow speed (VL), as shown in the middle part of FIG. 5, the driving time for rotating the movable part 200b from the reference position to the maximum angle that can be rotated. Becomes t2, and the driving time becomes longer than t1. Thus, when the drive speed of the movable part 200b is set to a slow speed (VL), the impact when the movable part 200b collides with an obstacle can be reduced, but the drive speed is long and it is easy to miss a photo opportunity.

  As described above, the impact at the time of collision increases as the driving speed increases, but it is desirable that the driving speed be as fast as possible in order not to miss a photo opportunity.

  Therefore, in the present embodiment, the driving speed is switched between when the movable unit 200b is driven in a range where the possibility of colliding with an obstacle is low and when driven in a range where the possibility of colliding with the obstacle is high. Specifically, the driving speed when the rotation angle of the movable part 200b does not exceed the threshold and the driving speed when the rotation angle exceeds the threshold are switched, and the driving speed when the rotation angle does not exceed the threshold. The driving speed when the rotation angle exceeds the threshold is made slower.

  The lower part of FIG. 5 shows the relationship between the drive speed and the drive time when such drive speed switching is performed. As shown in the lower part of FIG. 5, the driving speed of the movable part 200b is set to a high speed (VH) until the rotation angle exceeds the threshold value, and when the rotation angle of the movable part 200b exceeds the threshold value, Drive speed is slower than VH. Thereafter, as the rotation angle of the movable part 200b approaches the maximum rotatable angle, the drive speed of the movable part 200b is gradually reduced.

  In this way, by switching the driving speed according to the rotation angle, the impact at the time of the collision can be reduced at the rotation angle that is highly likely to collide with an obstacle. Furthermore, the drive time t3 can also be shortened compared to the drive time t2 when driving at a slow drive speed (VL) without switching the drive speed, making it difficult to miss a photo opportunity.

  Note that FIG. 5 shows an example in which the drive speed of the movable portion 200b is gradually decreased as the rotation angle approaches the maximum rotatable angle, but whether or not the rotation angle exceeds a threshold value. However, the drive speed may be switched.

  The threshold value for switching the driving speed of the movable unit 200b may be a fixed value or an arbitrary value set by the user using the setting switch of the operation unit 210. Further, when the movable part 200b is manually turned upward by the user before the movable part 200b is automatically turned upward, the movable part 200b is automatically turned upward. It is considered that the possibility that the movable part 200b collides with an obstacle is low until the rotation angle. For this reason, the threshold value may be set according to the rotation angle manually set by the user before the movable portion 200b is automatically rotated upward.

  Further, when the movable portion 200b is rotated from the rotated state toward the reference position, the movable portion 200b is unlikely to collide with an obstacle even if the rotation angle of the movable portion 200b exceeds a threshold value. It may be driven at a high driving speed (VH).

  Processing in the drive unit 207 when switching the drive speed of the movable unit 200b as described above will be described with reference to FIG. In FIG. 6, an example in which the driving speed is switched between two speeds will be described for the sake of simplicity.

  In step S1, the drive unit 207 determines whether or not there is a drive instruction for the movable part 200b from the strobe control unit 201. If there is a drive instruction, the process proceeds to step S2. If there is no drive instruction, step S1 is performed. repeat. Note that the drive instruction from the strobe control unit 201 includes target drive information such as a target drive amount and a target rotation angle indicating a drive target of the movable unit 200b.

  In step S <b> 2, the drive unit 207 acquires drive information indicating the drive amount and rotation angle from the reference position of the movable unit 200 b from the encoder 209.

  In step S3, the drive unit 207 determines whether or not to drive the movable unit 200b in a direction away from the reference position based on the target drive information acquired from the strobe control unit 201 and the drive information acquired from the encoder 209. . When the movable part 200b is driven in a direction away from the reference position, the process proceeds to step S4, and when the movable part 200b is driven in a direction approaching the reference position, the process proceeds to step S7.

  In step S4, the drive unit 207 determines whether or not the drive information acquired from the encoder 209 exceeds the threshold value. If the drive information exceeds the threshold value, the process proceeds to step S5. The process proceeds to S6.

  In step S5, the driving unit 207 drives the movable unit 200b at a low driving speed (VL) to drive the movable unit 200b in a range where there is a high possibility of colliding with an obstacle, and the process proceeds to step S8.

  On the other hand, in step S6, the drive unit 207 drives the movable unit 200b at a high driving speed (VH) in order to drive the movable unit 200b in a range where the possibility of colliding with an obstacle is low, and the process proceeds to step S8.

  When the movable part 200b is driven in the direction approaching the reference position, the possibility of colliding with an obstacle is low, so in step S7, the drive part 207 drives the movable part 200b at a high drive speed (VH), and the step The process proceeds to S8.

  In step S8, the drive unit 207 obtains drive information indicating the drive amount and rotation angle from the reference position of the movable unit 200b again from the encoder 209, and proceeds to step S9.

  In step S9, the drive unit 207 determines whether the movable unit 200b has reached the target position based on the target drive information acquired from the strobe control unit 201 and the latest drive information acquired from the encoder 209. To do. If the target position has been reached, the process proceeds to step S10 to end the drive, and if not, the process returns to step S3.

  As described above, by switching the driving speed according to the rotation angle and driving direction, when there is a high possibility of collision with an obstacle, the driving speed can be reduced to reduce the impact when the collision occurs, and driving Shorten time as much as possible and make it difficult to miss a photo opportunity. In order to reduce the impact at the time of collision even in a range where the possibility of collision with an obstacle is low, the movable unit 200b may be driven at a speed slower than the maximum speed that can be executed. . In that case, driving in a range where the possibility of colliding with an obstacle is low is also limited, but in a range where the possibility of colliding with an obstacle is high, driving is further performed than in a range where the possibility of colliding with an obstacle is low. Will be limited.

(Modification)
In the above two embodiments, the drive control is switched so as to limit the drive in the range where the rotation angle exceeds the threshold, rather than the drive in the range where the rotation angle of the movable part 200b does not exceed the threshold. When the possibility that the movable part 200b collides with an obstacle is low, the driving need not be limited. For example, when the movable unit 200b is automatically rotated upward and then the movable unit 200b is automatically rotated again within a predetermined time, the rotation angle at which the drive control is switched last time is used. However, the possibility that the movable part 200b collides with the obstacle is low.

  Accordingly, drive control according to the elapsed time since the last time the drive instruction was received from the strobe controller 201 will be described with reference to FIG. The switching of the drive control in FIG. 7 represents the switching between the drive control when the rotation angle of the movable part 200b does not exceed the threshold and the drive control when the rotation angle exceeds the threshold. This corresponds to the limitation of the rotation angle and the switching of the driving speed of the second embodiment.

  In step S101, the drive unit 207 determines whether or not there is a drive instruction for the movable unit 200b from the strobe control unit 201. If there is a drive instruction, the process proceeds to step S102, and if there is no drive instruction, step S101 is performed. repeat.

  Next, in step S102, the drive unit 207 determines whether or not the elapsed time since the previous drive instruction was received from the strobe control unit 201 is within a predetermined time. If it is within the predetermined time, the process proceeds to step S103. If the predetermined time is exceeded, the process proceeds to step S104.

  In step S103, the drive unit 207 is less likely to collide with the obstacle because the elapsed time since the previous drive instruction from the strobe control unit 201 was received is within a predetermined time. Shall not be switched.

  On the other hand, in step S104, the drive unit 207 has exceeded the predetermined time since receiving the drive instruction from the strobe control unit 201 last time, so the possibility that the movable unit 200b collides with the obstacle is the same as the previous time. Since this is a change, the drive control is switched.

  In step S103 and step S104, after determining whether or not to switch drive control, the drive unit 207 performs drive control of the movable unit 200b in step S105.

  As described above, if it is considered that the possibility that the movable part 200b collides with an obstacle is low, it is determined that the drive control does not need to be switched, and the drive speed and the rotatable range are limited. The movable part 200b can be driven without applying a load.

  The processing performed by the drive unit 207 in the above two embodiments and modifications may be executed by the strobe control unit 201 and the camera control unit 301. For example, the strobe control unit 201 obtains drive information from the encoder 209, and the strobe control unit 201 executes the discrimination processing in step S3 and step S4 in FIG. 5 so as to perform drive control according to the discrimination result. You may instruct. Alternatively, the elapsed time is measured after the strobe control unit 201 outputs a drive instruction to the drive unit 207, and the determination process in step S102 of FIG. 6 is executed, and the drive control is switched according to the determination result. You may make it instruct | indicate implementation. Also in the case of execution by the camera control unit 301, the camera control unit 301 requests and obtains information necessary for the discrimination process from the strobe control unit 201 and outputs a control signal corresponding to the discrimination result to the strobe control unit 201. May be.

  In the above two embodiments, the drive control in the case where the movable part 200b is automatically driven in the upward direction has been described. However, the same drive control is performed in the case where the movable part 200b is automatically driven in the left-right direction. You may go.

  The strobe control unit 201 may output a drive instruction to the drive unit 207 in accordance with a control signal output from the camera control unit 301. At this time, the camera control unit 301 may output a control signal for driving the driving unit 207 in accordance with an operation on the operation unit of the camera 300 by the user.

  In the above two embodiments, the example in which the present invention is applied to the drive control of the movable portion of the illumination device that can be attached to and detached from the imaging device has been described. However, the illumination device built in the imaging device can be automatically driven. The present invention may be applied as long as it has a movable part.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

200 Strobe 200a Main Body 200b Movable Part 201 Strobe Control Part 206 Light Emitting Part 207 Drive Part 208 Motor 209 Encoder 210 Operation Part 211 Connection Part 300 Camera 301 Camera Control Part

Claims (9)

A light emitting unit;
A movable part that includes the light emitting part and is rotatably held with respect to the main body part;
Drive means for driving the movable part;
When the movable unit is automatically driven by the driving means, the drive in the range in which the rotation angle exceeds the threshold is performed rather than the drive in the range in which the rotation angle with respect to the reference position of the movable unit does not exceed the threshold. And a control means for limiting.   2. The control unit according to claim 1, wherein the control unit controls the driving unit so that the rotation angle does not exceed a range when the movable unit is automatically driven by the driving unit. The lighting device described.   When the control unit automatically drives the movable part by the driving unit, the control unit drives in the range in which the rotation angle exceeds the threshold value than the driving speed in the range in which the rotation angle does not exceed the threshold value. The lighting device according to claim 1, wherein the speed is reduced.   In the case where the control unit automatically drives the movable part in a direction away from the reference position by the driving unit, the rotation angle is greater than the driving in a range where the rotation angle does not exceed the threshold value. The lighting device according to any one of claims 1 to 3, wherein driving in a range exceeding a threshold value is limited.   When the elapsed time since the last time the movable unit was automatically driven by the drive unit exceeds a predetermined time, the control unit is configured to perform the rotation when the movable unit is automatically driven by the drive unit. 4. The lighting device according to claim 1, wherein driving in a range in which the rotation angle exceeds a threshold is limited to driving in a range in which a moving angle does not exceed a threshold. 5.   The lighting device according to claim 1, wherein the threshold value is set according to the rotation angle when the user manually drives the movable part. An imaging device that performs imaging using an illumination device capable of automatically driving a movable unit including the light emitting unit to change the irradiation direction of the light emitting unit,
Control means for limiting driving in the range in which the rotation angle exceeds the threshold, rather than driving in a range in which the rotation angle with respect to a reference position of the movable portion does not exceed the threshold when the movable portion is driven automatically. An imaging device comprising: A camera system including an illumination device capable of automatically driving a movable unit including the light emitting unit to change the irradiation direction of the light emitting unit, and an imaging device,
Control means for limiting driving in the range in which the rotation angle exceeds the threshold, rather than driving in a range in which the rotation angle with respect to a reference position of the movable portion does not exceed the threshold when the movable portion is driven automatically. And a camera system. A method for controlling an illumination device capable of automatically driving a movable part provided with the light emitting part in order to change the irradiation direction of the light emitting part,
A control step of restricting driving in a range in which the rotation angle exceeds the threshold value, rather than driving in a range in which the rotation angle with respect to a reference position of the movable unit does not exceed a threshold value when the movable portion is automatically driven. A control method characterized by comprising:

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