Imaging device and control method thereof

Abstract

To provide an imaging device that can achieve both a high radiation performance from an image pickup element, and a constant image tremor correction performance therefrom.SOLUTION: An imaging device 100 comprises: a system control unit 120; an image pickup element unit 230 that holds an image pickup element 231, and is arranged oscillatably in a direction orthogonal to an imaging optical axis; a front side plate 210 and a rear side plate 220 that support the image pickup element unit 230 oscillatably; an image tremor correction drive unit 240 that oscillates the image pickup element unit 230; and a heat absorption contact shoe 320 that is arranged movably in an optical axis direction. The system control unit 120 is configured to switch a first imaging mode in which the image pickup element 231 is oscillatable in a state with the heat absorption contact shoe 320 spaced apart from the image pickup element unit 230, and a second imaging mode in which the heat absorption contact shoe 320 and the image pickup element unit 230 are oscillatable integrally in a state with the heat absorption contact shoe 320 put into contact with the image pickup element unit 230.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an imaging apparatus having an image stabilization function using an imaging element, and a control method thereof. [Background technology]

[0002] Imaging devices with an image blur correction function for correcting shake applied to the housing of the imaging device during image capture are becoming widespread. One known method for correcting image blur is the in-housing image blur correction method, which corrects image blur by swinging (displacing) the image sensor in a plane perpendicular to the optical axis according to the magnitude and direction of the detected shake.

[0003] In the in-casing image stabilization method, in order to improve the displacement drive performance of the image sensor, the number of contact points between the moving part that holds the image sensor and the fixed part that is fixed to the image sensor casing is minimized. Also, the flexible circuit board that electrically connects the image sensor to the control circuit inside the casing is designed to be as long and thin as possible so as not to impede the displacement drive of the image sensor.

[0004] Because of this configuration, the in-housing image stabilization method has a problem in that there are few heat dissipation paths for transmitting heat generated in the image sensor section to the outside, and the image sensor is prone to becoming hot during image capture. To address this problem, Patent Document 1 discloses an image capture device equipped with a heat dissipation member that can be moved in the optical axis direction relative to a heat dissipation section provided in the image sensor section to switch between a contact state and a separation state. Patent Document 2 also discloses an image capture device in which a heat dissipation member is disposed around the image sensor, and when heat dissipation from the image sensor is required, the image sensor is moved so as to contact the heat dissipation member. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-278584 [Patent Document 2] Japanese Patent Application Publication No. 2019-145929 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the techniques disclosed in the above Patent Documents 1 and 2 have a problem in that image blur correction cannot be performed when the imaging element is in contact with the heat dissipation member.

[0007] An object of the present invention is to provide an imaging apparatus that can achieve both high heat dissipation performance from the imaging element and a certain level of image blur correction performance. [Means for solving the problem]

[0008] The imaging device of the present invention is characterized by comprising an imaging element, a movable part that holds the imaging element and is arranged so that it can swing in a direction perpendicular to the imaging optical axis, a fixed part that supports the movable part so that it can swing, a drive part that swings the movable part, a heat transfer member that is arranged so that it can move in the optical axis direction, and a control means that switches between a first imaging mode in which the movable part can swing with the heat transfer member separated from the movable part, and a second imaging mode in which the heat transfer member can swing integrally with the movable part with the heat transfer member in contact with the movable part. [Effects of the Invention]

[0009] According to the present invention, it is possible to realize an imaging device that can achieve both high heat dissipation performance from the imaging element and a certain level of image blur correction performance. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a block diagram showing a schematic configuration of an imaging device. [Figure 2] FIG. 2 is a first diagram showing the structure of an imaging unit and a heat absorption unit. [Figure 3] FIG. 2 is a second diagram showing the structure of the imaging unit and the heat absorption unit. [Figure 4] 2 is a rear view of the imaging unit and the heat absorption unit, and a cross-sectional view taken along the arrow AA in the rear view. FIG. [Figure 5] 10 is a flowchart illustrating imaging control of the imaging device. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0012] 1 is a block diagram showing a schematic configuration of an image capturing apparatus 100 according to an embodiment. Specifically, the image capturing apparatus 100 is a digital camera.

[0013] The imaging device 100 has a photographing lens section 400. The photographing lens section 400 is equipped with an image stabilization lens 410, an AF lens 420, an aperture 430, and an in-lens gyro 440. The imaging device 100 has an imaging unit 200 and a heat absorption unit 300. The imaging unit 200 has an image sensor 231 and an image stabilization drive section 240.

[0014] The imaging device 100 includes an aperture driver 123, a correction lens driver 124, an AF lens driver 125, a system controller 120, a memory 140, a shutter 110, a shutter controller 122, an image processor 121, and an in-housing gyro 180. The imaging device 100 also includes a timer 160, a thermometer 170, a storage medium 500, a display unit 150, a battery 600, a power controller 126, a power switch 135, and an operation unit 130.

[0015] The photographing lens section 400 is generally made up of multiple lenses, and the image stabilization lens 410 and the AF lens 420 shown in FIG. 1 are representative examples of some of the lenses included in the imaging device 100.

[0016] The system control unit 120 calculates the displacement drive amount of the image stabilization lens 410 based on the amount of shake detected by the in-lens gyro 440, and transmits the calculation result to the correction lens drive unit 124. The correction lens drive unit 124 oscillates the image stabilization lens 410 in a plane perpendicular to the imaging optical axis (hereinafter referred to as the "optical axis") based on the displacement drive amount acquired from the system control unit 120, thereby correcting image shake. An in-lens image stabilization mechanism is configured in this way, but an in-lens image stabilization mechanism is not necessarily required for the imaging device according to the present invention.

[0017] The system control unit 120 calculates the amount of drive of the AF lens 420 in the optical axis direction based on the defocus amount detected by the image processing unit 121 using the image plane phase difference method, and transmits the calculation result to the AF lens driving unit 125. The AF lens driving unit 125 drives the AF lens 420 in the optical axis direction based on the amount of drive of the AF lens 420 in the optical axis direction acquired from the system control unit 120, thereby performing a focusing operation (focusing) on ​​the subject. The iris 430 adjusts the amount of light incident on the image sensor 231. The iris driving unit 123 drives the iris 430 under the control of the system control unit 120.

[0018] The system control unit 120 is a microcontroller that performs overall control of the imaging device 100. For example, the system control unit 120 performs AF control and AE processing by controlling the shutter 110, AF lens 420, and aperture 430 based on the results of calculations performed by the image processing unit 121 on the image signal output from the imaging element 231. The memory 140 includes a ROM that stores constants, variables, programs, etc. for the operation of the system control unit 120, and a RAM that is used for temporarily storing various data and as a work area for the system control unit 120. The image processing unit 121 generates an image signal consisting of a digital signal by AD converting the image signal acquired from the imaging element 231, and also performs predetermined image processing on the image signal.

[0019] The image sensor 231 converts the optical image formed on the image sensor surface 231a (see FIG. 2(b)) into an electrical signal to generate an image signal, which is output to the image processing unit 121. The system control unit 120 calculates the displacement drive amount of the image sensor 231 based on the amount of shake detected by the in-housing gyro 180, and transmits the calculation result to the image shake correction drive unit 240. The image shake correction drive unit 240 oscillates the image sensor 231 in a plane perpendicular to the optical axis based on the displacement drive amount acquired from the system control unit 120, thereby correcting image shake. In this way, an in-housing image shake correction mechanism that corrects image shake within the housing of the image capturing device 100 is configured.

[0020] The timer 160 measures various elapsed times. The thermometer 170 measures the temperature of the image sensor 231. The storage medium 500 is, for example, an SD card, a CF card, a CFexpress card, etc., but is not limited to these. The operation unit 130 includes various buttons and switches, a touch panel superimposed on the display screen of the display unit 150, etc., and serves to set conditions for performing image capture, playback of captured images, communication, etc., and to input user instructions to the system control unit 120, such as starting image capture and image playback.

[0021] A power switch 135 switches the power supply to the imaging device 100 on and off. The power supply control unit 126 is composed of a battery detection circuit, a DC / DC converter, a switch circuit that switches between blocks to which electricity is applied, and the like. The power supply control unit 126 detects the type and remaining capacity of the battery 600 that serves as the power source for the imaging device 100, and supplies the required voltage to each unit including the storage medium for the required period based on the detection result and instructions from the system control unit 120. The display unit 150 is, for example, a liquid crystal display device, and displays captured images (live view images), plays back and displays captured images stored in the storage medium 500, displays menu screens, and the like.

[0022] Under the control of the system control unit 120, the heat absorption unit 300 absorbs heat generated by the imaging element 231 and suppresses a temperature rise of the imaging element 231 according to the usage status of the imaging device 100 (particularly the operating status of the imaging element 231).

[0023] The imaging device 100 allows selective setting, via the operation unit 130, between a first imaging mode that prioritizes image stabilization performance over heat absorption performance from the imaging element 231 and a second imaging mode that prioritizes heat absorption performance from the imaging element 231 over image stabilization performance. The first imaging mode prioritizes image stabilization, making it useful for, for example, capturing still images with a slow shutter speed. The second imaging mode achieves both high heat dissipation performance from the imaging element 231 and a certain level of image stabilization performance. Therefore, the second imaging mode is useful for video recording, in which the temperature of the imaging element 231 is likely to rise, and enables longer continuous shooting times and reduced image noise while achieving a certain level of image stabilization effectiveness. The system control unit 120 sets the imaging mode to either the first imaging mode or the second imaging mode based on an instruction from the operation unit 130. In the imaging device 100, the first imaging mode is set to normal mode by default, but this is not limited to this.

[0024] The relationship between the mechanical structures of the imaging unit 200 and the heat absorption unit 300 changes between the first imaging mode and the second imaging mode. Next, the configurations of the imaging unit 200 and the heat absorption unit 300 will be described.

[0025] Fig. 2 is a first diagram showing the structures of the imaging unit 200 and the heat absorption unit 300. Fig. 2(a) and (b) show an exploded perspective view of the imaging unit 200 and a perspective view of the heat absorption unit 300, respectively, and the imaging unit 200 and the heat absorption unit 300 are viewed from different directions in Fig. 2(a) and Fig. 2(b).

[0026] The imaging unit 200 is configured by sandwiching an imaging element unit 230 between a front plate 210 and a back plate 220 formed from frame-shaped metal plates. The front plate 210 is fixed to a structure that constitutes the housing of the imaging device 100 and is immovable, while the back plate 220 is fixed to the front plate 210 with the imaging element unit 230 sandwiched between them.

[0027] The imaging element unit 230 has an imaging element 231, an imaging element holder 232 that holds the imaging element 231, and a heat dissipation plate 250 that is held by the imaging element holder 232. The imaging element holder 232 has an opening in the center, and the imaging element 231 is held by being adhered to the imaging element holder 232 around the central opening in a state where its imaging surface 231a is exposed from the central opening toward the front side of the imaging element holder 232. Note that an optical member 235 such as a low-pass filter that protects the imaging element 231 is disposed in front of the central opening of the imaging element holder 232. However, the optical member 235 is not necessarily required.

[0028] The heat dissipation plate 250 is a sheet metal member having an inner surface 251 that faces the back surface of the imaging element 231. The heat dissipation plate 250 may be a sheet metal member made of a magnetic metal material or a non-magnetic metal material.

[0029] The heat dissipation plate 250 is held by screws or the like on the imaging element holder 232, with heat transfer rubber 260 sandwiched between the back surface of the imaging element 231 and the heat dissipation plate inner surface 251. Three balls 211 (rolling members) are arranged around the imaging element 231 between the front plate 210 and the imaging element holder 232 so as to surround the optical axis in a plane perpendicular to the optical axis. The three balls 211 roll freely, so that the imaging element unit 230 is held between the front plate 210 and the rear plate 220 so as to be movable (swingable) in any direction in the plane perpendicular to the optical axis.

[0030] The imaging element holder 232 holds a magnet 233, and the magnet 233 magnetically attracts the front plate 210, causing the front plate 210 and the imaging element holder 232 to come into contact with each other via the ball 211. This determines the flange back position of the imaging element 231 in the imaging device 100 to be a specified position.

[0031] Next, the configuration of the image stabilization drive unit 240 will be described. A magnet 241 is arranged on the front plate 210, and a magnet 242 is arranged on the back plate 220 so as to face each other in the optical axis direction. A coil 243 is arranged in the image sensor holder 232 at a position sandwiched between the magnets 241 and 242. When power is supplied to the coil 243 from the power supply control unit 126, a magnetic field generated in the coil 243 interacts with the magnetic fields of the magnets 241 and 242, generating repulsive and attractive forces that control the swing of the image sensor unit 230. In other words, the front plate 210 and the back plate 220 are fixed units fixed to the housing of the imaging device 100, and support the image sensor unit 230 so that it can swing.

[0032] Generally, the system control unit 120 controls the driving of the image stabilization drive unit 240 so that the image sensor unit 230 is maintained at the center position of the image capture, and also performs swing control to displace the image sensor unit 230 in a direction that cancels out the image shake of the imaging device 100.

[0033] The heat absorption unit 300 is disposed so as to face the heat dissipation plate outer surface 252 of the heat dissipation plate 250 in the optical axis direction, and is attached to the rear plate 220. Fig. 3 is a second diagram showing the structures of the imaging unit 200 and the heat absorption unit 300. Figs. 3(a) and 3(b) show a perspective view of the imaging unit 200 and an exploded perspective view of the heat absorption unit 300, respectively, and the imaging unit 200 and the heat absorption unit 300 are viewed from different directions in Figs. 3(a) and 3(b).

[0034] The heat absorption unit 300 includes a substrate 310 , a first magnet 312 , a second magnet 324 , a third magnet 322 , a heat absorption contact 320 , a graphite sheet 330 and a coil 340 .

[0035] The substrate 310 is a plate-like member made of a non-magnetic material, and is attached to and held by the rear plate 220. Therefore, the substrate 310 is held immovably relative to the housing of the imaging device 100 via the rear plate 220. A first magnet 312 is disposed on a substrate inner surface 311 of the substrate 310 that faces the heat dissipation plate outer surface 252 in the optical axis direction. The heat absorption contact 320 is a heat transfer member made of a non-magnetic metal material, has a substantially flat plate shape, and is disposed between the heat dissipation plate outer surface 252 and the substrate inner surface 311. A second magnet 324 is disposed on the surface of the heat absorption contact 320 that faces the substrate inner surface 311.

[0036] In the first imaging mode, which prioritizes the drive performance of the image stabilization over the heat absorption performance from the imaging unit 200, the first magnet 312 and the second magnet 324 are attracted to each other, thereby holding the heat absorption contact 320 on the base material 310. Note that the attracted state of the first magnet 312 and the second magnet 324 may be a state in which they are in contact with each other, or a state in which they are attracted to each other with a certain gap between them. In this state, the heat absorption contact 320 is spaced apart from the heat dissipation plate 250 and is held on the base material 310, and this is defined as "the heat absorption contact 320 is in the first position."

[0037] A hole shape 313 is formed in the substrate inner surface 311 of the substrate 310, and a convex shape 321 corresponding to the hole shape 313 is formed on the surface of the heat absorption contact 320 that faces the substrate inner surface 311 in the optical axis direction. When the heat absorption contact 320 is in the first position, the hole shape 313 and the convex shape 321 engage with each other, thereby restricting movement of the heat absorption contact 320 in a direction perpendicular to the optical axis direction.

[0038] A third magnet 322 and a graphite sheet 330 are arranged on the surface of the heat-absorbing contact 320 that faces the heat-dissipating plate outer surface 252 of the heat-dissipating plate 250 in the optical axis direction. The graphite sheet 330 has a strip shape, and one end is connected to the heat-dissipating contact 320 and the other end is connected to a part of the housing of the imaging device 100, thereby thermally connecting the heat-absorbing contact 320 to the housing. A magnet holding hole 253 is provided on the heat-dissipating plate outer surface 252 of the heat-dissipating plate 250 at a position corresponding to the third magnet 322, and a fourth magnet 350 (imaging unit side magnet) is adhered and held in the magnet holding hole 253.

[0039] In the second differential mode, which prioritizes heat absorption performance from the imaging unit 200 over image stabilization drive performance, the third magnet 322 and the fourth magnet 350 are attracted to each other, so that the heat absorption contact 320 is held in contact with the heat dissipation plate 250. Note that the attracted state of the third magnet 322 and the fourth magnet 350 may be a state in which they are in contact with each other, or a state in which they are attracted to each other with a certain gap between them. In this state, the heat absorption contact 320 is spaced from the base material 310 and in contact with the heat dissipation plate 250, which is defined as "the heat absorption contact 320 is in the second position."

[0040] The heat-absorbing contact 320 has dowel shapes 323 formed on a surface thereof that faces the heat-dissipating plate outer surface 252 of the heat-dissipating plate 250 in the optical axis direction, and the heat-dissipating plate outer surface 252 has hole shapes 254 formed therein that correspond to the dowel shapes 323. When the heat-absorbing contact 320 is in the second position in contact with the heat-dissipating plate 250, the dowel shapes 323 engage with the hole shapes 254. Therefore, when the image sensor unit 230 is swung in the plane orthogonal to the optical axis, the heat-absorbing contact 320 also swung integrally with the image sensor unit 230 in the plane orthogonal to the optical axis.

[0041] The position of the heat-absorbing contact 320 is switched between the first position and the second position by energizing the coil 340. To enable this switching, the coil 340 is disposed on the substrate 310 at a position facing the third magnet 322 when the heat-absorbing contact 320 is in the first position. The coil 340 is an electromagnet, and generates a magnetic field to switch the position of the heat-absorbing contact 320 between the first position and the second position.

[0042] Next, the relationship between the position of the heat absorption contact 320 and the operation control of the coil 340 will be described. Fig. 4(a) is a rear view of the imaging unit 200 and the heat absorption unit 300. Fig. 4(b) is a cross-sectional view taken along the line AA in Fig. 4(a) when the heat absorption contact 320 is in a first position. Fig. 4(c) is a cross-sectional view taken along the line AA in Fig. 4(a) when the heat absorption contact 320 is in a second position.

[0043] As described above, when heat-absorbing contact 320 is in the first position, second magnet 324 arranged on heat-absorbing contact 320 is attracted to first magnet 312 arranged on substrate 310 and held in contact with substrate inner surface 311. In this state, an attractive force is also generated between third magnet 322 held by heat-absorbing contact 320 and fourth magnet 350 held by heat-dissipating plate 250, but the magnitude of this attractive force is greater than the attractive forces between first magnet 312 and second magnet 324. When heat-absorbing contact 320 is in the first position, heat generated by imaging element 231 is conducted to heat-dissipating plate 250 via heat-transfer rubber 260, and then to imaging element holder 232 via the contact surface between heat-dissipating plate 250 and imaging element holder 232.

[0044] To switch the heat-absorbing contact 320 from the first position to the second position, current is supplied to the coil 340 with the imaging element unit 230 in the reference position, generating a magnetic force F1 that is a repulsive force against the third magnet 322. Note that the imaging element unit 230 being in the reference position refers to the imaging element unit 230 being positioned so that the optical axis passes through the center of the imaging surface 231a of the imaging element 231. Due to the generation of the magnetic force F1, the combined force of the attractive forces of the third magnet 322 and the fourth magnet 350 and the magnetic force F1 becomes greater than the attractive forces of the first magnet 312 and the second magnet 324, and the heat-absorbing contact 320 moves toward the heat-dissipating plate 250. At this time, the hole shape 313 and the convex shape 321 are disengaged, and the hole shape 254 and the dowel shape 323 are engaged.

[0045] As described above, in the second position, the heat-absorbing contact 320 is attracted to and held on the heat-dissipating plate outer surface 252 of the heat-dissipating plate 250 with the graphite sheet 330 sandwiched therebetween. In the second position, compared to the first position, the distance between the third magnet 322 and the fourth magnet 350 is shorter, increasing the attractive force acting therebetween, while the distance between the first magnet 312 and the second magnet 324 is longer, decreasing the attractive force acting therebetween. As a result, the attractive force acting on the third magnet 322 and the fourth magnet 350 is greater than the attractive force acting on the first magnet 312 and the second magnet 324, and the heat-absorbing contact 320 is held attracted to the heat-dissipating plate outer surface 252 even after the power supply to the coil 340 is stopped.

[0046] When heat-absorbing contact 320 is in the second position, in addition to the heat transfer path in the first position, heat generated by image sensor 231 is transferred via a heat transfer path from heat dissipation plate 250 to the housing of image sensor 100 via graphite sheet 330. As a result, when heat-absorbing contact 320 is in the second position, more heat generated by image sensor 231 can be released to the housing of image sensor 100 than when heat-absorbing contact 320 is in the first position, and as a result, it is possible to suppress a temperature rise in image sensor 231.

[0047] On the other hand, when the heat-absorbing contact 320 is in the second position, the weight of the heat-absorbing contact 320 and the reaction force of the graphite sheet 330 are applied to the image sensor unit 230. Therefore, it is undeniable that the responsiveness of the image sensor unit 230 to the oscillation control for image shake correction by the image shake correction drive unit 240 is lower than when the heat-absorbing contact 320 is in the first position. However, by increasing the driving force for oscillating the image sensor unit 230 in the second imaging mode in which the heat-absorbing contact 320 is in the second position compared to the first imaging mode in which the heat-absorbing contact 320 is in the first position during image shake correction control, it is possible to suppress the decrease in responsiveness. Considering that the image shake correction performance is lower in the second imaging mode than in the first imaging mode, control may be performed to limit the selectable range of settable shooting parameters, such as by making a slower shutter speed unselectable. Making it impossible to select a slow shutter speed means that the limit value on the slow side of the selectable shutter speed is set shorter in the second imaging mode than in the first imaging mode.

[0048] When returning the heat-absorbing contact 320 from the second position to the first position, the coil 340 is energized so as to generate a magnetic force F2 in the opposite direction to that generated when the heat-absorbing contact 320 was moved from the first position to the second position. In other words, the heat-absorbing contact 320 can be returned to the first position by attracting the third magnet 322 to the coil 340, which functions as an electromagnet. After the heat-absorbing contact 320 has returned to the first position, the attractive force acting between the first magnet 312 and the second magnet 324 keeps the heat-absorbing contact 320 in the first position, even if the coil 340 is de-energized.

[0049] The mechanism for moving the heat absorption contact 320 between the first position and the second position is not limited to the magnet-and-coil configuration described above, and other configurations may be used. For example, the third magnet 322 held by the heat absorption contact 320 and the fourth magnet 350 and coil 340 held by the heat dissipation plate 250 may be eliminated. Instead, a rollable ball (rolling member) may be sandwiched between the heat absorption contact 320 and the base material 310, and the base material 310 may not be fixed to the imaging unit 200, so that the entire heat absorption unit 300 can be moved in the optical axis direction by a predetermined driving device. Even with this configuration, the heat absorption contact 320 can move between the first position and the second position, and when the heat absorption contact 320 is in the second position, the heat absorption contact 320 can swing integrally with the heat dissipation plate 250 in a plane perpendicular to the optical axis.

[0050] Next, a series of steps from setting the imaging mode to photographing will be described. Fig. 5 is a flowchart illustrating imaging control of imaging device 100. Each process (step) indicated by an S number in the flowchart of Fig. 5 is realized by system control unit 120 loading a predetermined program stored in ROM of memory 140 into RAM of memory 140 and comprehensively controlling the operation of each unit of imaging device 100.

[0051] When the power switch 135 is turned on to start up the imaging device 100, in S501 the system control unit 120 sets the imaging mode to the first imaging mode, which is the default setting. In S502, the system control unit 120 determines whether or not a change to the second imaging mode has been accepted via the operation unit 130. If the system control unit 120 determines that a change to the second imaging mode has been accepted (YES in S502), the process proceeds to S503.

[0052] In S503, the system control unit 120 displays a warning on the display unit 150. The warning includes information that the image stabilization function will be partially restricted and that selectable shooting parameters will be partially restricted. In S504, the system control unit 120 energizes the coil 340 of the heat absorption unit 300 to move the heat absorption contact 320 from the first position to the second position. In S505, the system control unit 120 changes the control method so that the driving force of the image stabilization drive unit 240 is greater than that in the first imaging mode (changing the driving force of the image stabilization drive unit 240 from the driving force in the first imaging mode to the driving force in the second imaging mode).

[0053] In S506, the system control unit 120 determines whether or not a shooting instruction has been received via the operation unit 130. If the system control unit 120 determines that a shooting instruction has been received (YES in S506), the process proceeds to S507, and if the system control unit 120 determines that a shooting instruction has not been received (NO in S506), the process proceeds to S509.

[0054] In S507, the system control unit 120 acquires an image (image capture processing). In S508, the system control unit 120 stores image data of the captured image acquired in S508 in the storage medium 500. In S509, the system control unit 120 determines whether a change to the first image capture mode has been accepted via the operation unit 130. If the system control unit 120 determines that a change to the first image capture mode has been accepted (YES in S509), the process proceeds to S510. In S510, the system control unit 120 energizes the coil 340 of the heat absorption unit 300 to move the heat absorption contact 320 from the second position to the first position. In S510, the system control unit 120 returns the control method for image stabilization to the normal control method (changes the driving force of the image stabilization driving unit 240 from the driving force in the second image capture mode to the driving force in the first image capture mode), and then returns the process to S501.

[0055] If the system control unit 120 determines in S509 that an instruction to change to the first imaging mode has not been received (NO in S509), the process proceeds to S512. In S512, the system control unit 120 determines whether an instruction to end imaging has been received via the operation unit 130. If the system control unit 120 determines that an instruction to end imaging has been received (YES in S512), the process proceeds to S513. If the system control unit 120 determines that an instruction to end imaging has not been received (NO in S512), the process returns to S506. An example of an instruction to end imaging is operation of the power switch 135 to turn off the power of the imaging device 100. In S513, the system control unit 120 energizes the coil 340 of the heat absorption unit 300 to move the heat absorption contact 320 from the second position to the first position, and then ends this process.

[0056] If the system control unit 120 determines in S502 that a change to the second imaging mode has not been accepted (NO in S502), the process proceeds to S514. The processes of S514 to S516 are the same as the processes of S506 to S508, and therefore description thereof will be omitted. The process of S517 is the same as the process of S512. If the system control unit 120 determines that an instruction to end imaging has been accepted (YES in S517), the process ends, and if it determines that an instruction to end imaging has not been accepted (NO in S517), the process returns to S501.

[0057] In this way, by using the first imaging mode and the second imaging mode as needed depending on the imaging scene, the user can, for example, shoot videos for a long period of time while performing image shake correction, or obtain images with highly corrected image shake.

[0058] The present invention has been described in detail above based on its preferred embodiments, but the present invention is not limited to these specific embodiments, and various forms within the scope of the invention that do not deviate from the gist of the invention are also included in the present invention.

[0059] 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. [Explanation of symbols]

[0060] 100 Imaging device 120 System control unit 200 Imaging unit 210 Front plate 220 Rear plate 230 Image sensor unit 231 Image sensor 240 Image stabilization drive unit 310 Base material 312 First Magnet 320 Endothermic Contact 322 Third Magnet 324 Second Magnet 340 coil 350 Fourth Magnet

Claims

1. An imaging element; a movable section that holds the image sensor and is arranged to be swingable in a direction perpendicular to the photographing optical axis; a fixed portion that supports the movable portion so that the movable portion can swing; a drive unit that swings the movable unit; a heat transfer member arranged to be movable in the optical axis direction; an imaging device comprising: a control means for switching between a first imaging mode in which the movable part is capable of swinging while the heat transfer member is separated from the movable part, and a second imaging mode in which the heat transfer member is in contact with the movable part and is capable of swinging integrally with the movable part.

2. 2. The imaging device according to claim 1, wherein the control means makes the magnitude of the driving force by the drive unit to oscillate the movable part in the second imaging mode greater than the magnitude of the driving force to oscillate the movable part in the first imaging mode.

3. 3. The imaging device according to claim 1, wherein the control means limits the range of selectable imaging parameters that can be set in the second imaging mode to a range that is smaller than the range of selectable imaging parameters that can be set in the first imaging mode.

4. the photographing parameter is a shutter speed, 4. The image pickup apparatus according to claim 3, wherein said control means sets the lower limit of the shutter speed in said second image pickup mode to be shorter than that in said first image pickup mode.

5. The fixing portion is a base material that holds the heat transfer member in a state where the heat transfer member is spaced apart from the movable portion; a coil provided on the substrate; a first magnet provided on the substrate; the heat transfer member includes a second magnet and a third magnet; the movable portion includes a fourth magnet provided on a back surface of the imaging element, in the first imaging mode, the heat transfer member is held on the base by attraction between the first magnet and the second magnet; 5. The imaging device according to claim 1, wherein, when transitioning from the first imaging mode to the second imaging mode, the control unit causes a current to flow through the coil to generate a repulsive force between the coil and the third magnet, moves the third magnet toward the fourth magnet to attract the third magnet and the fourth magnet, and separates the first magnet and the second magnet, thereby bringing the heat transfer member into contact with the movable part.

6. 6. The imaging device according to claim 5, wherein the control means stops the supply of current to the coil after the heat transfer member is shifted from a state in which it is held by the base material to a state in which it is in contact with the movable portion.

7. 7. The imaging device according to claim 5, wherein, when transitioning from the second imaging mode to the first imaging mode, the control means passes a current through the coil to generate an attractive force between the coil and the third magnet, moves the third magnet toward the coil to separate the third magnet and the fourth magnet, and attracts the first magnet and the second magnet, thereby holding the heat transfer member to the base material.

8. The imaging device according to claim 7, wherein the control means stops the supply of current to the coil after the heat transfer member has transitioned from a state in contact with the movable portion to a state in which the heat transfer member is held by the base material.

9. a substrate that holds the heat transfer member; a rolling member sandwiched between the base material and the heat transfer member; a driving means for integrally moving the heat transfer member, the rolling member, and the base material along the photographing optical axis, 5. The imaging device according to claim 1, wherein the control means controls the driving of the driving means to move the heat transfer member, the rolling member, and the base material integrally along the imaging optical axis, thereby switching between the first imaging mode and the second imaging mode.

10. 10. The imaging device according to claim 1, wherein the heat transfer member is thermally connected to a housing of the imaging device.

11. An imaging element; a movable section that holds the image sensor and is arranged to be swingable in a direction perpendicular to the photographing optical axis; a fixed portion that supports the movable portion so that the movable portion can swing; a drive unit that swings the movable unit; a heat transfer member arranged to be movable in the optical axis direction, the control method for an imaging device comprising: a step of switching between a first imaging mode in which the movable part is capable of swinging while the heat transfer member is separated from the movable part, and a second imaging mode in which the heat transfer member is in contact with the movable part and is capable of swinging integrally with the movable part.

Images