Driving device and imaging apparatus

Abstract

To provide a driving device and an imaging apparatus.SOLUTION: A digital camera 1 includes: a magnet 52 and a magnet 53; a driving coil 62 and a position sensor 63 which receive an action from the magnets; first electric wiring (a wiring area 64A and a wiring area 65A) which passes through the position sensor 63 and generates a first electromotive force by causing an electric current to flow through the driving coil 62; second electric wiring (a wiring area 64B and a wiring area 65B) which generates a second electromotive force which is an electromotive force in a direction reverse to the first electromotive force by causing the electric current to flow through the driving coil 62; and a control part 18 which controls the electric current flowing to the driving coil 62 on the basis of the output of the position sensor 63.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a driving device and an imaging device. [Background technology]

[0002] Patent Document 1 describes a camera module including a semiconductor package that uses a Hall element as a position detection sensor, and describes reducing the effect of leakage magnetic fields on the position detection sensor by arranging the position detection sensor and current supply wiring as far apart as possible, or by ensuring that the current flows in opposite directions between the pair of current supply wiring to cancel out the leakage magnetic fields.

[0003] Patent Document 2 describes a blur correction device that is used in an electronic device equipped with an image sensor that outputs an image signal corresponding to an optical image formed through an imaging optical system, and that corrects blur that occurs in an image represented by the image signal by moving the image sensor in a direction perpendicular to the optical axis of the imaging optical system.

[0004] Patent Document 3 describes an optical unit with shake correction function, which includes a fixed body, a movable body that holds an optical element, a support mechanism that movably supports the movable body relative to the fixed body, and a shake correction drive mechanism that moves the movable body, wherein the shake correction drive mechanism is a magnetic drive mechanism having a magnet provided on either the movable body or the fixed body, and a drive coil that is provided on the other of the movable body or the fixed body and applies an electromagnetic force to the movable body within the magnetic field of the magnet, and wherein the member of the movable body or the fixed body on which the drive coil is provided is provided with a magnetic detection element that detects displacement of the magnet due to the electromagnetic force, and a cancellation coil that generates magnetic flux that can cancel the magnetic flux from the drive coil that acts on the magnetic detection element. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-102803 A [Patent Document 2] Patent Publication No. 2020-170962 [Patent Document 3] Patent Publication No. 2018-205585 Summary of the Invention [Means for solving the problem]

[0006] One embodiment of a driving device according to the technology of the present disclosure comprises a magnet, a coil and a position sensor that are affected by the magnet, electrical wiring that passes through the position sensor and spans from the inside of the coil to the outside of the coil, and a processor that controls the current flowing through the coil based on the output of the position sensor, and when current flows through the coil, the electromotive force generated by the electrical wiring is below a threshold value.

[0007] An imaging device according to one embodiment of the technique of the present disclosure includes the above-described driving device. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing a schematic configuration of a digital camera 1 that is an embodiment of an imaging device of the present invention. [Figure 2] 2 is a schematic diagram partially illustrating the general configuration of an image sensor shift mechanism 13 in the digital camera 1 shown in FIG. [Figure 3] FIG. 3 is a schematic cross-sectional view taken along the line AA in FIG. 2. [Figure 4] 3 is a schematic diagram of the movable part 60 shown in FIG. 2 as viewed in direction Z2. [Figure 5] 5 is a schematic diagram corresponding to FIG. 4, showing a first modified example of electrical wiring connecting a position sensor 63 and a control unit 18. FIG. [Figure 6] 5 is a schematic diagram corresponding to FIG. 4, showing a second modified example of electrical wiring connecting a position sensor 63 and a control unit 18. FIG. [Figure 7]5 is a schematic diagram corresponding to FIG. 4, showing a third modified example of electrical wiring connecting the position sensor 63 and the control unit 18. FIG. [Figure 8] 1 shows the appearance of a smartphone 200. [Figure 9] 9 is a block diagram showing the configuration of the smartphone 200 shown in FIG. 8. FIG. [Figure 10] 8 is a schematic diagram corresponding to FIG. 4, illustrating a configuration example in which a position sensor 63 is disposed outside a drive coil 62 in the electrical wiring configuration shown in FIG. 7. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] 1 is a diagram showing the schematic configuration of a digital camera 1, which is one embodiment of an imaging device of the present invention. Digital camera 1 includes a camera body 10 and a lens device 20. Lens device 20 is configured to be detachable from camera body 10, in other words, replaceable. Lens device 20 may be integrated with camera body 10.

[0010] The lens device 20 has an imaging optical system 30 and a lens control unit 40. The imaging optical system 30 includes an imaging lens 31 and an aperture mechanism (not shown). The imaging lens 31 is composed of a single lens or multiple lenses, including, for example, a lens for adjusting the focus of the imaging optical system 30. The lens control unit 40 is mainly composed of a processor, and drives and controls the imaging optical system 30 under the control of the control unit 18 (described later).

[0011] The camera body 10 comprises an image sensor 12, an image sensor shift mechanism 13, an image sensor drive unit 14, a display unit 15 which is a display device such as a liquid crystal display or an organic EL (Electro Luminescence) display, memory 16 which includes RAM (Random Access Memory) as a volatile memory for temporarily recording information, and ROM (Read Only Memory) as a non-volatile memory for recording in advance programs and various information required for their operation, a vibration detector 17, a control unit 18, and a recording medium 19 such as a memory card composed of non-volatile memory.

[0012] The imaging element 12 captures an image of a subject through an imaging optical system 30. The imaging element 12 is configured by a CCD (Charge Coupled Device) image sensor, a CMOS (Complementary Metal Oxide Semiconductor) image sensor, or the like.

[0013] The imaging element shift mechanism 13 is a mechanism for moving the imaging element 12 in a plane perpendicular to the optical axis K of the imaging optical system 30, to prevent blurring of the image captured by the imaging element 12 (image blur).

[0014] The vibration detector 17 is a sensor for detecting the movement of the digital camera 1. The vibration detector 17 is configured by an acceleration sensor, an angular velocity sensor, or both of them. The vibration detector 17 may be provided in the lens device 20.

[0015] The control unit 18 controls the entire digital camera 1, and its hardware structure is made up of various processors that execute programs and perform processing.

[0016] The various processors include a CPU (Central Processing Unit), which is a general-purpose processor that executes programs to perform various processes; a programmable logic device (PLD), such as an FPGA (Field Programmable Gate Array), whose circuit configuration can be changed after manufacture; and a dedicated electrical circuit, such as an ASIC (Application Specific Integrated Circuit), which is a processor having a circuit configuration specifically designed to perform specific processes. More specifically, the structure of these various processors is an electrical circuit combining circuit elements such as semiconductor devices. The control unit 18 may be configured with one of the various processors, or may be configured with a combination of two or more processors of the same or different types (e.g., a combination of multiple FPGAs or a combination of a CPU and an FPGA).

[0017] The control unit 18 controls the image sensor driving unit 14 to cause the image sensor 12 to capture an image of the subject, and causes the image sensor 12 to output a captured image signal corresponding to the subject image formed on the light receiving area of ​​the image sensor 12. The control unit 18 performs image processing on the captured image signal output from the image sensor 12 to generate an image in a format that can be played back by the digital camera 1 itself or other devices, such as JPEG (Joint Photographic Experts Group) format.

[0018] When capturing an image of a subject using the image sensor 12, the control unit 18 controls the image sensor shift mechanism 13 based on vibration information (angular velocity, etc.) of the digital camera 1 detected by the vibration detector 17, and corrects image blur by moving the image sensor 12 within a plane perpendicular to the optical axis K.

[0019] Fig. 2 is a schematic diagram partially illustrating the general configuration of the image sensor shift mechanism 13 in the digital camera 1 shown in Fig. 1. Fig. 3 is a schematic cross-sectional view taken along the line AA in Fig. 2. Fig. 2 shows two mutually orthogonal directions passing through a plane (hereinafter referred to as the XY plane) perpendicular to the optical axis K of the imaging optical system 30 as direction X and direction Y. In the following, the direction along the optical axis K will be referred to as direction Z, one of the directions Z (the direction from the front of the page in Fig. 2 toward the back) will be referred to as direction Z1, and the other of the directions Z (the direction from the back of the page in Fig. 2 toward the front) will be referred to as direction Z2.

[0020] Image sensor shift mechanism 13 includes fixed part 50, the position of which remains unchanged within digital camera 1, and movable part 60, which is movable in direction X relative to fixed part 50. Although not shown, image sensor shift mechanism 13 also includes another fixed part equivalent to fixed part 50, and a movable part equivalent to movable part 60, which is movable in direction Y relative to this other fixed part.

[0021] The fixed part 50 includes a plate-like flat member 51 parallel to the XY plane whose thickness direction coincides with the Z direction, and magnets 52 and 53 extending in the Y direction and arranged side by side at an interval in the X direction on the Z2 side surface of the flat member 51. The magnet 52 is fixed to the flat member 51 with its north pole facing the Z2 direction. The magnet 53 is fixed to the flat member 51 with its south pole facing the Z2 direction.

[0022] The movable section 60 includes a support member (not shown) that supports the imaging element 12, and a flexible substrate 61 that has a planar area parallel to the XY plane facing the flat plate member 51. The flexible substrate 61 is fixed to the support member, and when the flexible substrate 61 moves in the X direction, the imaging element 12 supported by the support member also moves in the X direction.

[0023] In FIG. 2, the flexible substrate 61 is shown as transparent using imaginary lines to facilitate understanding of the configuration. A drive coil 62 for moving the movable part 60 in the direction X and a position sensor 63 for detecting the position of the movable part 60 on the XY plane are mounted on the surface of the planar region of the flexible substrate 61 on the direction Z1 side. The axial direction of the drive coil 62 coincides with the direction Z. The position sensor 63 is disposed inside the drive coil 62. The position sensor 63 is constituted by a Hall element. The position sensor 63 may be any sensor capable of detecting the position of the movable part 60 based on a change in magnetic force supplied from a magnet, and a magnetic sensor other than a Hall element may also be used.

[0024] 2, the planar region of the flexible substrate 61 is further equipped with a control unit 18 and a driver 11 that controls the supply of power to the drive coil 62. The control unit 18 and the position sensor 63 are connected by electrical wiring (described later) formed on the flexible substrate 61. The control unit 18 determines a target position of the movable unit 60 based on vibration information detected by the vibration detector 17, and controls the driver 11 so that the position of the movable unit 60 detected based on the output of the position sensor 63 coincides with this target position, thereby performing image stabilization control to move the movable unit 60 to the target position. The control unit 18 and the driver 11 may be mounted on a separate substrate that is connected to the flexible substrate 61 via a connector.

[0025] The drive coil 62 and the magnets 52 and 53 form a voice coil motor, and when a current is supplied to the drive coil 62 from the driver 11, the flexible substrate 61 can be moved in the direction X relative to the fixed part 50. The position sensor 63 outputs a signal corresponding to the magnetic force from the north pole of the magnet 52 to the south pole of the magnet 53. The magnetic force detected by the position sensor 63 changes depending on the position of the position sensor 63, so the position of the movable part 60 can be detected based on the output of the position sensor 63. In this manner, the magnetic field formed by the magnets 52 and 53 acts on both the drive coil 62 and the position sensor 63. In this embodiment, the drive of the movable part 60 and the position detection of the movable part 60 are both performed using the common magnets 52 and 53, thereby reducing the size of the image sensor shift mechanism 13.

[0026] The dashed arrows in Fig. 3 indicate magnetic flux lines (hereinafter referred to as coil magnetic flux lines) generated from the drive coil 62 when a current flowing counterclockwise in Fig. 2 is supplied to the drive coil 62 from the driver 11. The coil magnetic flux lines passing through the flexible substrate 61 proceed in direction Z1 inside the outer periphery of the drive coil 62 as shown in Fig. 3, but the direction is reversed and they proceed in direction Z2 outside the outer periphery of the drive coil 62. When the direction of the current flowing through the drive coil 62 is reversed, the direction of the coil magnetic flux lines becomes opposite to that described above. In this specification, direction Z is defined as the direction of the coil magnetic flux lines passing through the drive coil 62.

[0027] Fig. 4 is a schematic diagram of the movable part 60 shown in Fig. 2 as viewed in direction Z2. The driver 11 is not shown in Fig. 4. As shown in Fig. 4, the control part 18 and the position sensor 63 are connected by electrical wiring 64 and electrical wiring 65 formed on the flexible substrate 61. The electrical wiring 64 and electrical wiring 65 are differential output wiring of the Hall elements that constitute the position sensor 63.

[0028] The electrical wiring 64 connects one of the two differential output terminals of the position sensor 63 to the input terminal T1 of the control unit 18. The flexible substrate 61 has a multi-layer structure, and the electrical wiring 64 is formed, for example, on the top layer.

[0029] The electrical wiring 65 connects the other of the two differential output terminals of the position sensor 63 to the input terminal T2 of the control unit 18. The electrical wiring 65 is formed in a layer below the layer in which the electrical wiring 64 is formed.

[0030] 4, the electrical wiring 64 and the electrical wiring 65 intersect at a single point P1. The electrical wiring 64 is configured by a wiring region 64A between the point P1 and the position sensor 63 and a wiring region 64B between the point P1 and the input terminal T1. The electrical wiring 65 is configured by a wiring region 65A between the point P1 and the position sensor 63 and a wiring region 65B between the point P1 and the input terminal T2.

[0031] In this way, when viewed in the Z direction, the flexible substrate 61 can be considered to have a first loop pattern (a pattern forming the closed region L1) that can function as a one-turn coil formed by the wiring region 64A, the wiring region 65A, and the position sensor 63. Also, when viewed in the Z direction, the flexible substrate 61 can be considered to have a second loop pattern (a pattern forming the closed region L2) that can function as a one-turn coil formed by the wiring region 64B, the wiring region 65B, and the control unit 18.

[0032] Here, although this does not actually occur, we will assume a state in which a current flows from input terminal T1 of control unit 18 to input terminal T2 via position sensor 63. In this case, the direction of the current flowing through the first loop pattern is clockwise in FIG. 4, as indicated by the dashed arrow in the figure. On the other hand, the direction of the current flowing through the second loop pattern is counterclockwise in FIG. 4, as indicated by the dashed arrow in the figure. If the direction of the current flowing through each loop pattern in this assumed state is defined as the winding direction of the one-turn coil that forms each loop pattern, then the winding direction of the one-turn coil that forms the first loop pattern is opposite to the winding direction of the one-turn coil that forms the second loop pattern.

[0033] 4 shows coil magnetic flux lines (coil magnetic flux line B1 and coil magnetic flux line B2) that pass through flexible substrate 61 when current is passed through drive coil 62. Coil magnetic flux line B1 indicates a magnetic flux line that travels in direction Z1, and its magnitude indicates its strength. Coil magnetic flux line B2 indicates a magnetic flux line that travels in direction Z2, and its magnitude indicates its strength.

[0034] Because the first loop pattern is disposed inside the drive coil 62, only the coil magnetic flux line B1 passes through the closed region L1. Because the second loop pattern is disposed from the inside of the drive coil 62 to the outside of the drive coil 62, the coil magnetic flux line B1 and the coil magnetic flux line B2 pass through the closed region L2. In this embodiment, the first loop pattern and the second loop pattern are configured so that the magnetic flux φL1 in the closed region L1, which indicates the integrated value of the coil magnetic flux lines passing through the closed region L1, and the magnetic flux φL2 in the closed region L2, which indicates the integrated value of the coil magnetic flux lines passing through the closed region L2, substantially coincide with each other. The two magnetic fluxes substantially coincide with each other when the absolute value of the difference between the two magnetic fluxes is equal to or less than a threshold value (ideally, zero). This threshold value is appropriately determined so as not to affect the position detection accuracy of the position sensor 63.

[0035] The magnetic flux φL2 in the closed region L2 is the product of the magnetic flux density IN at a portion of the closed region L2 that is inside the outer periphery of the drive coil 62 and the area of ​​this portion, and the product of the magnetic flux density OUT at a portion of the closed region L2 that is outside the outer periphery of the drive coil 62 and the area of ​​this portion. Note that the magnetic flux density IN and the magnetic flux density OUT have different signs.

[0036] When a current flows through the driving coil 62, coil magnetic flux lines pass through the closed region L1, and when fluctuations occur in these coil magnetic flux lines, a first electromotive force is generated in the first loop pattern. The first electromotive force corresponds to the magnetic flux φL1 in the closed region L1. The wiring region 64A and the wiring region 65A constitute a first electrical wiring that generates the first electromotive force when a current flows through the driving coil 62.

[0037] Similarly, when a current flows through the driving coil 62, coil magnetic flux lines pass through the closed region L2, and when fluctuations occur in these coil magnetic flux lines, a second electromotive force is generated in the second loop pattern. This second electromotive force is in the opposite direction to the first electromotive force. The second electromotive force corresponds to the magnetic flux φL2 in the closed region L2. The wiring region 64B and the wiring region 65B form a second electrical wiring that generates a second electromotive force when a current flows through the driving coil 62.

[0038] As described above, by substantially matching the magnetic flux φL1 and the magnetic flux φL2, the first electromotive force and the second electromotive force can be substantially matched. As a result, the first electromotive force generated in the electrical wiring connecting the position sensor 63 and the control unit 18 can be canceled out by the second electromotive force generated in the electrical wiring. Therefore, the electromotive force generated in the electrical wiring when a current flows through the drive coil 62 can be minimized, and this electromotive force is less likely to affect the detection performance of the position sensor 63 compared to when this electromotive force is large. As a result, the position detection accuracy of the movable part 60 can be improved.

[0039] Fig. 5 is a schematic diagram corresponding to Fig. 4, showing a first modified example of the electrical wiring connecting the position sensor 63 and the control unit 18. Fig. 5 differs from Fig. 4 in that the position sensor 63, the control unit 18, the electrical wiring 64, and the electrical wiring 65 are shifted to the right in the direction X, and that a part of the wiring area 65B overlaps with the wiring area 64B in the range R1.

[0040] In the modification shown in FIG. 5, a closed region L2 is formed by a portion of the wiring region 65B extending from the end of the range R1 opposite the control unit 18 side to point P1 and a portion of the wiring region 64B extending from the end of the range R1 opposite the control unit 18 side to point P1. In the modification shown in FIG. 5, the closed regions L1 and L2 are symmetrical with respect to a line extending in the direction X through point P1, and their areas are substantially the same. Furthermore, one end of each of the closed regions L1 and L2 in the direction X overlaps with the drive coil 62. The two areas being substantially the same means that the absolute value of the difference between the two areas is equal to or less than a threshold (ideally, zero). This threshold is appropriately set to a small value that does not affect the position detection accuracy of the position sensor 63.

[0041] In the modified example of Fig. 5, if the position in the direction X is the same, the strength distribution (magnetic flux density) of the coil magnetic flux lines in the region inside the outer periphery of the drive coil 62 is constant in the direction Y. The closed region L1 and the closed region L2 are located at the same position in the direction X but different positions in the direction Y, and furthermore, the closed region L1 and the closed region L2 have approximately the same area. Therefore, the magnetic flux φL1 of the closed region L1 and the magnetic flux φL2 of the closed region L2 are approximately the same. Therefore, similar to the configuration of Fig. 4, the electromotive force that may be generated in the electrical wiring 64 and the electrical wiring 65 when a current is passed through the drive coil 62 can be minimized, thereby improving the position detection accuracy of the movable part 60.

[0042] FIG. 6 is a schematic diagram corresponding to FIG. 4, showing a second modified example of the electrical wiring connecting the position sensor 63 and the control unit 18. FIG. 6 differs from FIG. 5 only in that the position sensor 63, the control unit 18, the electrical wiring 64, and the electrical wiring 65 are shifted to the left, and the first loop pattern and the second loop pattern are arranged inside the drive coil 62. According to the modified example of FIG. 6, like the configuration of FIG. 5, it is possible to improve the accuracy of detecting the position of the movable part 60. Furthermore, according to the modified examples of FIGS. 5 and 6, it is possible to minimize the area of ​​the loop pattern, which simplifies the wiring design and reduces manufacturing costs.

[0043] 7 is a schematic diagram corresponding to FIG. 4, showing a third modified example of the electrical wiring connecting the position sensor 63 and the control unit 18. In the modified example of FIG. 7, instead of the electrical wiring 64 and the electrical wiring 65, an electrical wiring 66 is formed on the flexible substrate 61, spanning from the inside of the driving coil 62 to the outside of the driving coil 62.

[0044] The electrical wiring 66 is composed of wiring 66A that connects one of the two differential output terminals of the position sensor 63 to the input terminal T2 of the control unit 18, and wiring 66B that connects the other of the two differential output terminals of the position sensor 63 to the input terminal T1 of the control unit 18.

[0045] In the modified example shown in Figure 7, when viewed in direction Z, flexible substrate 61 can be considered to have a loop pattern PT (a pattern forming closed area L3) formed by wiring 66A, wiring 66B, position sensor 63, and control unit 18, which can function as a single-turn coil.

[0046] The magnetic flux φL3 in the closed region L3 is the product of the magnetic flux φL3a in the portion of the closed region L3 that is inside the outer periphery of the drive coil 62 and the magnetic flux φL3b in the portion of the closed region L3 that is outside the outer periphery of the drive coil 62. A first area of ​​the region outside the drive coil 62 in the loop pattern PT and a second area of ​​the region inside the outer periphery of the drive coil 62 in the loop pattern PT are determined so that the magnetic flux φL3 is equal to or less than a threshold (preferably zero). Specifically, the first area is larger than the second area. This threshold is appropriately set to a small value that does not affect the position detection accuracy of the position sensor 63.

[0047] In the modification shown in FIG. 7, when a current flows through the drive coil 62, coil magnetic flux lines pass through the closed region L3. When the coil magnetic flux lines fluctuate, an electromotive force is generated in the loop pattern PT. This electromotive force depends on the magnetic flux φL3 in the closed region L3, but the magnetic flux φL3 is below a threshold value. Therefore, when a current flows through the drive coil 62, the electromotive force generated in the electrical wiring 66 is below a threshold value (preferably zero). This threshold value is appropriately set to a small value that does not affect the position detection accuracy of the position sensor 63. This modification prevents the electromotive force generated in the electrical wiring 66 from increasing. Compared to when this electromotive force increases, this electromotive force is less likely to affect the detection performance of the position sensor 63. As a result, the position detection accuracy of the movable part 60 can be improved.

[0048] According to the modification shown in FIG. 7, electrical wiring 66 can be formed on the same layer of flexible substrate 61, which allows for greater freedom in wiring design and lower manufacturing costs compared to the examples shown in FIGS.

[0049] The drive device is composed of the magnet 52, magnet 53, drive coil 62, position sensor 63, electrical wiring 64, electrical wiring 65, and control unit 18, or the magnet 52, magnet 53, drive coil 62, position sensor 63, electrical wiring 66, and control unit 18, which have been described so far.

[0050] Next, the configuration of a smartphone, which is another embodiment of the imaging device of the present invention, will be described.

[0051] Fig. 8 shows the external appearance of smartphone 200. Smartphone 200 shown in Fig. 8 has a flat housing 201, and is provided on one surface of housing 201 with display panel 202 as a display unit and display input unit 204 which is an integrated unit of operation panel 203 as an input unit.

[0052] Such housing 201 also includes a speaker 205, a microphone 206, an operation unit 207, and a camera unit 208. The configuration of housing 201 is not limited to this, and for example, it is also possible to adopt a configuration in which the display unit and the input unit are independent, or a configuration having a foldable structure or a sliding mechanism.

[0053] FIG. 9 is a block diagram showing the configuration of the smartphone 200 shown in FIG.

[0054] As shown in FIG. 9, the main components of the smartphone include a wireless communication unit 210, a display input unit 204, a call unit 211, an operation unit 207, a camera unit 208, a memory unit 212, an external input / output unit 213, a GNSS (Global Navigation Satellite System) receiving unit 214, a motion sensor unit 215, a power supply unit 216, and a main control unit 220.

[0055] The smartphone 200 also has, as its main function, a wireless communication function for performing mobile wireless communication via a base station device BS (not shown) and a mobile communication network NW (not shown).

[0056] The wireless communication unit 210 performs wireless communication with a base station device BS accommodated in the mobile communication network NW in accordance with instructions from the main control unit 220. Using this wireless communication, various file data such as audio data and image data, e-mail data, etc. are sent and received, and web data, streaming data, etc. are received.

[0057] The display input unit 204 is a so-called touch panel that, under the control of the main control unit 220, displays images (still images and moving images) or text information, etc. to visually convey information to the user and detects user operations on the displayed information, and is equipped with a display panel 202 and an operation panel 203.

[0058] The display panel 202 uses an LCD (Liquid Crystal Display), an OLED (Organic Electro-Luminescence Display), or the like as a display device.

[0059] The operation panel 203 is placed so that an image displayed on the display surface of the display panel 202 can be seen, and is a device that detects one or more coordinates operated by a user's finger or a stylus. When this device is operated by the user's finger or a stylus, a detection signal generated by the operation is output to the main control unit 220. Next, the main control unit 220 detects the operation position (coordinates) on the display panel 202 based on the received detection signal.

[0060] As shown in FIG. 9, the display panel 202 and operation panel 203 of a smartphone 200, which is exemplified as one embodiment of the imaging device of the present invention, are integrated to form a display input unit 204, and the operation panel 203 is positioned so as to completely cover the display panel 202.

[0061] When such an arrangement is adopted, operation panel 203 may also have a function to detect user operations in areas outside display panel 202. In other words, operation panel 203 may have a detection area for the overlapping portion that overlaps display panel 202 (hereinafter referred to as a display area), and a detection area for the other outer edge portion that does not overlap display panel 202 (hereinafter referred to as a non-display area).

[0062] The size of the display area and the size of the display panel 202 may be completely the same, but they do not necessarily have to be the same. Also, the operation panel 203 may have two sensitive areas: an outer edge portion and an inner portion other than the outer edge portion. Furthermore, the width of the outer edge portion is designed appropriately depending on the size of the housing 201, etc.

[0063] Furthermore, the position detection method used in the operation panel 203 may be a matrix switch method, a resistive film method, a surface acoustic wave method, an infrared method, an electromagnetic induction method, a capacitance method, or the like, and any method may be used.

[0064] The call unit 211 is equipped with a speaker 205 or a microphone 206, and converts the user's voice input through the microphone 206 into voice data that can be processed by the main control unit 220 and outputs it to the main control unit 220, or decodes voice data received by the wireless communication unit 210 or the external input / output unit 213 and outputs it from the speaker 205.

[0065] Also, as shown in FIG. 8, for example, speaker 205 can be mounted on the same surface as display input unit 204, and microphone 206 can be mounted on the side surface of housing 201.

[0066] The operation unit 207 is a hardware key using a key switch or the like, and receives instructions from a user. For example, as shown in Fig. 8, the operation unit 207 is a push-button switch mounted on the side of the housing 201 of the smartphone 200, which turns on when pressed with a finger or the like, and turns off when the finger is released by the restoring force of a spring or the like.

[0067] The storage unit 212 stores the control program and control data of the main control unit 220, application software, address data associated with names or telephone numbers of communication partners, data of sent and received e-mails, web data downloaded by web browsing, downloaded content data, and also temporarily stores streaming data, etc. The storage unit 212 is composed of an internal storage unit 217 built into the smartphone and an external storage unit 218 having a removable external memory slot.

[0068] The internal memory unit 217 and the external memory unit 218 constituting the memory unit 212 are realized using storage media such as a flash memory type, a hard disk type, a multimedia card micro type, a card-type memory (e.g., MicroSD (registered trademark) memory, etc.), a RAM (Random Access Memory), a ROM (Read Only Memory), etc.

[0069] The external input / output unit 213 serves as an interface with all external devices connected to the smartphone 200, and is used to directly or indirectly connect to other external devices via communication (e.g., Universal Serial Bus (USB), IEEE1394, Bluetooth (registered trademark), RFID (Radio Frequency Identification), Infrared Data Association (IrDA) (registered trademark), UWB (Ultra Wideband) (registered trademark), ZigBee (registered trademark), etc.) or a network (e.g., Ethernet (registered trademark), wireless LAN (Local Area Network), etc.).

[0070] Examples of external devices that can be connected to the smartphone 200 include wired / wireless headsets, wired / wireless external chargers, wired / wireless data ports, memory cards connected via card sockets, SIM (Subscriber Identity Module Card) / UIM (User Identity Module Card) cards, external audio / video devices connected via audio / video I / O (Input / Output) terminals, wirelessly connected external audio / video devices, wired / wirelessly connected smartphones, wired / wirelessly connected personal computers, wired / wirelessly connected personal computers, earphones, etc.

[0071] The external input / output unit 213 can transmit data received from such external devices to each component inside the smartphone 200, or transmit data inside the smartphone 200 to external devices.

[0072] The GNSS receiver 214 receives GNSS signals transmitted from GNSS satellites ST1 to STn in accordance with instructions from the main controller 220, executes positioning calculation processing based on the received multiple GNSS signals, and detects a position consisting of the latitude, longitude, and altitude of the smartphone 200. When the GNSS receiver 214 can acquire position information from the wireless communication unit 210 or the external input / output unit 213 (for example, a wireless LAN), it can also detect the position using the position information.

[0073] The motion sensor unit 215 includes, for example, a three-axis acceleration sensor, and detects the physical movement of the smartphone 200 in accordance with instructions from the main control unit 220. By detecting the physical movement of the smartphone 200, the direction of movement or acceleration of the smartphone 200 is detected. The detection result is output to the main control unit 220.

[0074] The power supply unit 216 supplies power stored in a battery (not shown) to each unit of the smartphone 200 in accordance with instructions from the main control unit 220.

[0075] The main control unit 220 includes a microprocessor, operates according to the control program and control data stored in the memory unit 212, and controls all the units of the smartphone 200. The microprocessor of the main control unit 220 has the same functions as the control unit 18. The main control unit 220 also has a mobile communication control function that controls all the units of the communication system to perform voice communication or data communication via the wireless communication unit 210, and an application processing function.

[0076] The application processing function is realized by the main control unit 220 operating in accordance with the application software stored in the storage unit 212. Examples of the application processing function include an infrared communication function that controls the external input / output unit 213 to perform data communication with a partner device, an email function that sends and receives emails, and a web browsing function that views web pages.

[0077] The main control unit 220 also has an image processing function for displaying video on the display input unit 204 based on image data (still image or moving image data) such as received data or downloaded streaming data.

[0078] The image processing function refers to a function in which the main control unit 220 decodes the image data, performs image processing on the decoded result, and displays the image on the display input unit 204.

[0079] Furthermore, the main control unit 220 executes display control for the display panel 202 and operation detection control for detecting user operations via the operation unit 207 and the operation panel 203 .

[0080] By executing display control, the main control unit 220 displays software keys such as icons or scroll bars for starting application software, or displays a window for creating an e-mail.

[0081] The scroll bar refers to a software key for receiving an instruction to move the displayed portion of an image, such as a large image that cannot fit in the display area of ​​the display panel 202.

[0082] In addition, by executing operation detection control, the main control unit 220 detects user operations through the operation unit 207, accepts operations on the above icons and input of character strings into the input field of the above window through the operation panel 203, or accepts requests to scroll the displayed image through the scroll bar.

[0083] Furthermore, by executing operation detection control, the main control unit 220 determines whether the operation position on the operation panel 203 is an overlapping portion (display area) that overlaps the display panel 202 or an outer edge portion (non-display area) that does not overlap the display panel 202, and is equipped with a touch panel control function that controls the sensitive area of ​​the operation panel 203 or the display position of the software key.

[0084] Furthermore, the main control unit 220 can also detect a gesture operation on the operation panel 203 and execute a preset function in response to the detected gesture operation.

[0085] Gesture operation is not a simple touch operation as in the past, but rather an operation in which a trajectory is drawn with a finger or the like, multiple positions are specified simultaneously, or a combination of these is used to draw a trajectory for at least one of multiple positions.

[0086] The camera unit 208 includes the lens device 20, the image sensor 12, the image sensor shift mechanism 13, the image sensor drive unit 14, and the vibration detector 17 shown in FIG.

[0087] The captured image data generated by the camera unit 208 can be stored in the storage unit 212 or output via the external input / output unit 213 or the wireless communication unit 210 .

[0088] In the smartphone 200 shown in FIG. 9, the camera unit 208 is mounted on the same surface as the display input unit 204, but the mounting position of the camera unit 208 is not limited to this, and it may be mounted on the back surface of the display input unit 204.

[0089] Furthermore, the camera unit 208 can be used for various functions of the smartphone 200. For example, an image acquired by the camera unit 208 can be displayed on the display panel 202, or an image from the camera unit 208 can be used as one of the operation inputs for the operation panel 203.

[0090] Furthermore, when the GNSS receiver 214 detects a position, it can also detect the position by referring to an image from the camera unit 208. Furthermore, it can also refer to an image from the camera unit 208 to determine the optical axis direction of the camera unit 208 of the smartphone 200 or determine the current usage environment, without using a triaxial acceleration sensor or by using the image in combination with a triaxial acceleration sensor. Of course, the image from the camera unit 208 can also be used in application software.

[0091] In addition, image data of still or video images can be added with location information acquired by the GNSS receiving unit 214, audio information acquired by the microphone 206 (which may be converted to text information by the main control unit, etc.), posture information acquired by the motion sensor unit 215, etc., and stored in the memory unit 212, or output via the external input / output unit 213 or wireless communication unit 210.

[0092] Even in the smartphone 200 configured as described above, it is possible to detect the position of the imaging element with high accuracy and perform image blur correction with high accuracy.

[0093] Up to this point, it has been assumed that the magnets 52 and 53 are provided on the fixed part 50, and the drive coil 62, position sensor 63, and electrical wiring are provided on the movable part 60. However, it is also possible to configure the magnets 52 and 53 to be provided on the movable part 60, and the drive coil 62, position sensor 63, and electrical wiring to be provided on the fixed part 50.

[0094] Up to this point, it has been assumed that camera body 10 of digital camera 1 performs image shake correction by moving image sensor 12. However, instead of moving image sensor 12, digital camera 1 may perform image shake correction by moving an anti-shake lens included in imaging optical system 30 of lens device 20. In this case, the configuration shown in FIG. 2 may be employed as the structure for driving and detecting the position of the anti-shake lens.

[0095] 4 to 6, the first loop pattern and the second loop pattern are in contact with each other at a single point P1 in plan view. However, the first loop pattern and the second loop pattern may be in contact with each other via a line instead of a point.

[0096] Furthermore, although the position sensor 63 is arranged inside the drive coil 62, it may be arranged outside the drive coil 62. In this case, the electrical wiring 64 and the electrical wiring 65 shown in FIGS. 4 to 6 are arranged, for example, outside the drive coil 62. The shape and arrangement of each loop pattern are determined so that the magnetic flux in the first loop pattern and the magnetic flux in the second loop pattern substantially coincide with each other. In the modified example shown in FIG. 7, for example, as shown in FIG. 10, the wiring 66A and the wiring 66B may be formed in different layers, overlapped midway, and then connected to the control unit 18.

[0097] As explained above, this specification describes at least the following items. Note that the elements in parentheses correspond to those in the above-described embodiments, but are not limited to these.

[0098] (1) Magnets (magnets 52 and 53), a coil and a position sensor (a driving coil 62 and a position sensor 63) that are acted upon by the magnet; a first electrical wiring (wiring area 64A and wiring area 65A) that passes through the position sensor and generates a first electromotive force when a current flows through the coil; a second electrical wiring (wiring area 64B and wiring area 65B) that generates a second electromotive force, which is an electromotive force in the opposite direction to the first electromotive force, when a current flows through the coil; a processor (control unit 18) that controls the current flowing through the coil based on the output of the position sensor.

[0099] (2) The drive device according to (1), the first electrical wiring forms a first loop pattern; The second electrical wiring forms a second loop pattern.

[0100] (3) The drive device according to (2), A driving device in which, among the magnetic flux lines generated by current flowing through the coil, the integrated value of the magnetic flux lines passing through the first loop pattern (magnetic flux φL1) is approximately equal to the integrated value of the magnetic flux lines passing through the second loop pattern (magnetic flux φL2).

[0101] (4) The drive device according to (2) or (3), a driving device in which the first electrical wiring and the second electrical wiring are electrically connected;

[0102] (5) The drive device according to (4), A driving device in which, when viewed in the direction of magnetic flux lines passing through the coil (direction Z), the first electrical wiring and the second electrical wiring are in contact with each other at a point (point P1) or a line.

[0103] (6) A drive device according to any one of (2) to (5), A driving device in which the area of ​​the first loop pattern and the area of ​​the second loop pattern are substantially the same when viewed in the direction of magnetic flux lines passing through the coil (direction Z).

[0104] (7) A drive device according to any one of (2) to (6), The position sensor is a driving device that is arranged inside the coil when viewed in the direction of the magnetic flux lines passing through the coil (direction Z).

[0105] (8) The drive device according to (7), A driving device in which the first loop pattern and the second loop pattern are arranged inside the coil when viewed in the direction of magnetic flux lines passing through the coil (direction Z).

[0106] (9) The drive device according to (7), A driving device in which, when viewed in the direction of the magnetic flux lines passing through the coil (direction Z), the first loop pattern and the second loop pattern are positioned inside the outer peripheral edge of the coil and partially overlap the coil.

[0107] (10) A drive device according to any one of (1) to (9), The driving device, wherein the first electrical wiring and the second electrical wiring are differential output wirings of the position sensor.

[0108] (11) Magnets (magnets 52 and 53), a coil and a position sensor (a driving coil 62 and a position sensor 63) that are acted upon by the magnet; an electrical wiring (electrical wiring 66) that passes through the position sensor and spans from the inside of the coil to the outside of the coil; a processor (control unit 18) that controls the current flowing through the coil based on the output of the position sensor; A driving device in which an electromotive force generated by the electrical wiring when a current flows through the coil is equal to or less than a threshold value.

[0109] (12) The drive device according to (11), The electrical wiring forms a loop pattern.

[0110] (13) The drive device according to (12), A driving device in which the integrated value (magnetic flux φL3) of magnetic flux lines passing through the loop pattern due to current flowing through the coil is equal to or less than a threshold value.

[0111] (14) The drive device according to (12) or (13), A driving device in which, when viewed in the direction (direction Z) of the magnetic flux lines passing through the coil, the area (first area) of the region outside the coil in the loop pattern is larger than the area (second area) of the region inside the outer edge of the coil in the loop pattern.

[0112] (15) A drive device according to any one of (11) to (14), The position sensor is a driving device that is arranged inside the coil when viewed in the direction of the magnetic flux lines passing through the coil (direction Z).

[0113] (16) A drive device according to any one of (11) to (15), The electric wiring is a differential output wiring of the position sensor.

[0114] (17) An imaging device (digital camera 1) including the drive device according to any one of (1) to (16). [Explanation of symbols]

[0115] 1. Digital camera 10 Camera body 11 Drivers 12 Image sensor 13 Image sensor shift mechanism 14 Image sensor drive unit 15 Display 16 memory 17 Vibration detector 18 Control Unit 19 Recording media 20 Lens device 30 Imaging optical system 31 Imaging lens 40 Lens control unit 50 Fixed part 51 Flat Plate Members 52, 53 Magnets 60 Moving parts 61 Flexible substrate 62 Drive coil 63 Position Sensor 64, 65 Electrical wiring 64A, 64B, 65A, 65B wiring area 66 Electrical Wiring 66A, 66B wiring L1, L2, L3 closed area P1 point T1, T2 input terminals B1, B2 coil magnetic flux lines R1 Range 200 smartphones 201 Case 202 Display Panel 203 Operation Panel 204 Display and input section 205 Speaker 206 Microphone 208 Camera Club 210 Radio Communication Department 211 Telephone section 212 Storage section 213 External input / output section 214 GNSS receiver 215 Motion sensor unit 216 Power supply section 217 Internal storage 218 External Memory Unit 220 Main control unit

Claims

1. A magnet and a coil and a position sensor that are acted upon by the magnet; an electrical wiring that passes through the position sensor and extends from the inside of the coil to the outside of the coil; a processor that controls a current to be passed through the coil based on an output of the position sensor; A driving device in which an electromotive force generated by the electrical wiring when a current flows through the coil is equal to or less than a threshold value.

2. 2. The drive device according to claim 1, The electrical wiring forms a loop pattern.

3. 3. The drive device according to claim 2, A driving device in which the integrated value of magnetic flux lines passing through the loop pattern due to a current flowing through the coil is equal to or less than a threshold value.

4. 4. The drive device according to claim 2 or 3, A driving device in which, when viewed in the direction of magnetic flux lines passing through the coil, the area of ​​the region outside the coil in the loop pattern is larger than the area of ​​the region inside the outer edge of the coil in the loop pattern.

5. 5. The drive device according to claim 1, The position sensor is disposed inside the coil when viewed in the direction of magnetic flux lines passing through the coil.

6. 6. The drive device according to claim 1, The electrical wiring is a differential output wiring of the position sensor.

7. An imaging device comprising the driving device according to claim 1 .

Images