JP2005338714A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To fix a movable part with lower power consumption in an imaging correction device that does not have a large mechanism, such as a motor, which fixes a movable part including an imaging element to a prescribed position within the range of movement. <P>SOLUTION: The imaging apparatus includes the imaging element 39a1, and a movable part 30a capable of moving in a first direction x perpendicular to the optical axis of a photographic lens in relation to the imaging element 39a1 and a second direction y perpendicular to the optical axis and the first direction. The imaging device also includes a fixing part 30b for supporting the movable part 30a such that the movable part 30a freely moves in the first direction and the second direction. The movable part 30a and fixing part 30b have first and second horizontal driving means for moving the movable part 30a in the first direction x, and first and second vertical driving means for moving the movable part 30a in the second direction y. The imaging apparatus further includes a control means for controlling the first and second horizontal driving means and the first and second vertical driving means. The control means causes at least the first and second horizontal driving means or the first and second vertical driving means to produce force for moving the movable part in opposite directions. Thereby, the movable part is rotated on a plane perpendicular to the optical axis and fixed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an imaging apparatus, and more particularly to a movable part fixing apparatus including an imaging element that can be moved for an image blur correction operation and the like.

  2. Description of the Related Art Conventionally, there has been proposed an image pickup apparatus that can move an image shake correction lens or an image sensor on a plane perpendicular to the optical axis, such as an image shake correction apparatus.

Patent Document 1 discloses an image blur correction apparatus that does not have a large-sized mechanism such as a motor that fixes a movable portion including an image blur correction lens at a specific position in a movement range. Patent Document 2 discloses an image blur correction apparatus having a large mechanism such as a motor that fixes a movable portion including an image blur correction lens at a specific position in a moving range.
JP 2002-229090 A Japanese Patent Laid-Open No. 10-142647

  However, in an image blur correction apparatus that does not have a large-sized mechanism such as a motor that fixes a movable part at a specific position in a moving range, such as the apparatus of Patent Document 1, when the main power supply is on and image blur correction is not performed. The movable part is fixed at a specific position by electromagnetic force. For this fixing, it is necessary to generate an electromagnetic force for holding the movable portion against the gravity, which causes a problem in power consumption.

  Further, as in the apparatus of Patent Document 2, if a large-scale mechanism such as a motor that fixes a movable part including an image blur correction lens or an imaging element to a specific position in a moving range is used, the problem of power consumption does not occur. The entire image blur correction apparatus was enlarged.

  Therefore, an object of the present invention is to provide an apparatus that fixes a movable part with low power consumption in an imaging apparatus that does not have a large-sized mechanism such as a motor that fixes a movable part including an imaging element at a specific position in a moving range. is there.

  An image pickup apparatus according to the present invention includes an image pickup element, a first direction orthogonal to the optical axis of the photographing lens with respect to the image pickup element, a movable portion movable in a second direction orthogonal to the optical axis and the first direction, A fixed portion that supports the movable portion in the first and second directions, and the movable portion and the fixed portion include first and second horizontal driving means for moving the movable portion in the first direction, and the movable portion. The first and second vertical direction driving means for moving in the second direction, and the first and second horizontal direction driving means, and the control means for controlling the first and second vertical direction driving means. Generating a force for moving the movable part in the opposite direction to at least one of the first and second horizontal driving means or the first and second vertical driving means on a plane perpendicular to the optical axis. Rotate and fix.

  Preferably, a frictional force is generated between the movable part and the member that supports the movable part included in the movable part or the fixed part so as to be movable in the first direction or the second direction by rotation. As a result, the movable part can be fixed using a frictional force in addition to the driving force of the driving means, so that it is possible to suppress power consumption required for fixing the movable part.

  More preferably, the movable part is a member that supports the movable part in the first direction, excluding the moving shaft having a line segment parallel to the first direction, a line segment parallel to the second direction, and the moving shaft. And a horizontal bearing portion that is included in the movable portion and supports the moving shaft so as to be movable in the first direction. The fixed portion serves as a member that supports the movable portion in the second direction. It has a vertical bearing part that is movably supported in the direction.

  More preferably, the amount of rotation of the movable part is substantially the same as the amount of clearance between the members that support the movable part.

  Preferably, the absolute values of the values of the forces that move the movable part in the opposite directions are equal.

  Preferably, the direction of rotation of the movable part by the first and second horizontal direction driving means is opposite to the direction of rotation of the movable part by the first and second vertical direction driving means. As a result, the image sensor or the like hardly tilts due to rotation.

  Preferably, any one of the movable part and the fixed part has first and second horizontal driving coils as the first and second horizontal driving means, and the first and second vertical driving means. The first and second vertical driving coils are provided, and the other of the movable part and the fixed part has first and second horizontal driving magnets as first and second horizontal driving means, 1. First and second vertical direction driving magnets are provided as second vertical direction driving means, and the force for moving the movable part is an electromagnetic force.

  More preferably, the first horizontal driving coil and the first horizontal driving magnet are in a positional relationship facing each other in the second direction, and the second horizontal driving coil and the second horizontal driving magnet are second. The first vertical direction driving coil and the first vertical direction driving magnet are in a positional relationship opposite to each other in the direction, and the second vertical direction driving coil and the second vertical direction driving magnet are in a positional relationship opposite to each other in the first direction. Is a positional relationship facing each other in the first direction.

  Preferably, by moving the movable part in the first and second directions, the optical axis shift on the imaging surface of the subject image caused by the blur is eliminated, and the positions of the subject image and the imaging surface are kept constant. The image blur correction operation is performed, and the control unit generates a force for moving the movable part in opposite directions when the main power source is on and the image blur correction operation is not performed.

  As described above, according to the present invention, there is provided an apparatus for fixing a movable part with low power consumption in an imaging apparatus that does not have a large-sized mechanism such as a motor for fixing a movable part including an imaging element to a specific position in a moving range. It becomes possible to do.

  Hereinafter, the present embodiment will be described with reference to the drawings. The imaging device 1 will be described as a digital camera. In order to describe the direction, in the imaging device 1, the horizontal direction orthogonal to the optical axis LX is the first direction x, the vertical direction orthogonal to the optical axis LX is the second direction y, and the horizontal direction parallel to the optical axis LX is The third direction z will be described. 5 is a configuration diagram of the image blur correction unit 30 of FIG. 4 as viewed from the second horizontal position detection and drive yoke 422b side in the second direction y, and FIG. 6 is a view taken along line AA of FIG. The block diagram in a cross section is shown.

  The parts related to the imaging of the imaging apparatus 1 are the Pon button 11 for switching on / off the power, the release button 13, the LCD monitor 17, the CPU 21, the imaging block 22, the AE unit 23, the AF unit 24, and the imaging unit 39a of the image blur correcting unit 30. And a photographing lens 67. In response to pressing of the Pon button 11, the on / off state of the Pon switch 11 a is switched, and thereby the on / off state of the power supply of the imaging device 1 is switched. The subject image is captured as an optical image through the photographing lens 67 by the imaging block 22 that drives the imaging unit 39a, and the image captured by the LCD monitor 17 is displayed. The subject image can also be optically observed with an optical viewfinder (not shown).

  When the release button 13 is half-pressed, the photometry switch 12a is turned on to perform photometry, distance measurement, and focusing operation. When the release button 13 is fully pressed, the release switch 13a is turned on to take an image. Is stored in memory.

  The CPU 21 is a control unit that controls each unit related to imaging and controls each unit related to image blur correction described later. Further, the CPU 21 stores a value of a parameter IS for determining whether or not a correction mode to be described later.

  The imaging block 22 drives the imaging unit 39a. The AE unit 23 performs a photometric operation of the subject to calculate an exposure value, and calculates an aperture value and an exposure time necessary for photographing based on the exposure value. The AF unit 24 performs distance measurement, and performs focus adjustment by displacing the photographing lens 67 in the optical axis direction based on the distance measurement result.

  The part relating to the image blur correction device of the image pickup apparatus 1, that is, the image blur correction, is a hole as a signal processing circuit of the image blur correction button 14, the CPU 21, the angular velocity detection unit 25, the driver circuit 29, the image blur correction unit 30 An element signal processing circuit 45 and a photographing lens 67 are included.

  When the image blur correction button 14 is pressed, the image blur correction switch 14a is turned on, and the angular velocity detection unit 25 and the image blur correction unit 30 are driven at regular intervals independently of other operations such as photometry. Thus, image blur correction is performed. The parameter IS = 1 is set in the correction mode in which the image blur correction switch 14a is turned on, and the parameter IS = 0 is set in the correction mode in which the image blur correction switch 14a is not turned off. In the present embodiment, this fixed time will be described as 1 ms.

  Various outputs corresponding to the input signals of these switches are controlled by the CPU 21. On / off information of the photometry switch 12a, release switch 13a, and image blur correction switch 14a is input to the ports P12, P13, and P14 of the CPU 21 as 1-bit digital signals, respectively. The imaging block 22, the AE unit 23, and the AF unit 24 input and output signals at ports P3, P4, and P5, respectively.

  Next, details of the angular velocity detection unit 25, the driver circuit 29, the image blur correction unit 30, the Hall element signal processing circuit 45, and the input / output relationship with the CPU 21 will be described.

  The angular velocity detection unit 25 includes first and second angular velocity sensors 26 and 27 and an amplifier / high pass filter circuit 28. The first and second angular velocity sensors 26 and 27 detect angular velocities in the first direction x and the second direction y every fixed time (1 ms) of the imaging device 1. The first angular velocity sensor 26 detects the angular velocity in the first direction x, and the second angular velocity sensor 27 detects the angular velocity in the second direction y. The amplifier / high-pass filter circuit 28 amplifies the signal related to the angular velocity, cuts the null voltage and panning of the first and second angular velocity sensors 26 and 27, and outputs an analog signal as the first and second angular velocities vx and vy of the CPU 21. Input to A / D0 and A / D1.

  The CPU 21 performs A / D conversion on the first and second angular velocities vx and vy input to A / D0 and A / D1, and then performs image blurring that occurs in a certain time (1 ms) by a conversion coefficient that takes into account the focal length and the like. Calculate the quantity. Therefore, the angular velocity detection unit 25 and the CPU 21 have an image blur amount calculation function.

  The CPU 21 calculates and sets the position S to be moved of the imaging unit 39a according to the image blur amount obtained by the calculation for each driving coil for each of the first direction x and the second direction y. The first direction x component of the position S is sx, and the second direction y component is sy. Movement of the movable part 30a including the imaging part 39a is performed by an electromagnetic force described later. In order to move the movable part 30a to this position S, the first direction x component of the driving force D that drives the driver circuit 29 is defined as a horizontal PWM duty DX, and the second direction y component is defined as a vertical PWM duty DY. The horizontal PWM duty DX and the vertical PWM duty DY are the duty of the pulse signal output to the driver circuit 29.

  When the image blur correction operation is performed by moving the movable portion 30a, the values of the horizontal direction PWM duty DX and the vertical direction PWM duty DY are both obtained by the above calculation.

  When performing the image blur correction operation, the PWM0 of the CPU 21 outputs the first horizontal PWM duty dx1 having the same value as the horizontal PWM duty DX to the driver circuit 29 in order to drive the first horizontal driving coil 31a. In order to drive the second horizontal driving coil 32a, the PWM1 of the CPU 21 outputs a second horizontal PWM duty dx2 having the same value as the horizontal PWM duty DX to the driver circuit 29. In order to drive the first vertical driving coil 33a, the PWM2 of the CPU 21 outputs the first vertical PWM duty dy1 having the same value as the vertical PWM duty DY to the driver circuit 29. In order to drive the second vertical driving coil 34 a, the PWM 3 of the CPU 21 outputs the second vertical PWM duty dy 2 having the same value as the vertical PWM duty DY to the driver circuit 29.

  When the image blur correction operation is not performed, the movable portion 30a has a clearance between the first to third horizontal movement bearing portions 51a to 53a and the movement shaft 50a, and the movement shaft 50a and the first to fourth vertical directions. A slight rotation using the clearance between the moving bearing portions 54b to 57b is performed and the frictional force generated therebetween is fixed. The position to be fixed is not specified, and is fixed at the position of the movable portion 30a in the previous image blur correction operation.

  Accordingly, the rotation amount of the movable portion 30a is substantially the same as the clearance amount between the support members such as the moving shaft 50a.

  In this case, the horizontal duty DX and the vertical duty DY are set to the first and second constant values c1 and c2. The first and second constant values c1 and c2 may be smaller than the values of the horizontal duty DX and the vertical duty DY obtained by calculation in the image blur correction operation.

  When the image blur correction operation is not performed, the PWM0 of the CPU 21 uses the first horizontal PWM duty dx1 (= c1) having the same value as the horizontal PWM duty DX in order to drive the first horizontal driving coil 31a. 29. In order to drive the second horizontal driving coil 32a, the PWM1 of the CPU 21 outputs to the driver circuit 29 a second horizontal PWM duty dx2 (= −c1) having the same absolute value as the horizontal PWM duty DX but with a different sign. . In order to drive the first vertical driving coil 33a, the PWM2 of the CPU 21 outputs the first vertical PWM duty dy1 (= c2) having the same value as the vertical PWM duty DY to the driver circuit 29. In order to drive the second vertical driving coil 34 a, the PWM 3 of the CPU 21 outputs a second vertical PWM duty dy <b> 2 (= −c <b> 2) having the same absolute value and the same sign as the vertical PWM duty DY to the driver circuit 29. .

  The driver circuit 29 receives the outputs of the first and second horizontal PWM duties dx1 and dx2, and causes the first and second horizontal driving currents ih1 and ih2 to flow through the first and second horizontal driving coils 31a and 32a. . The driver circuit 29 receives the outputs of the first and second vertical PWM duties dy1 and dy2, and causes the first and second vertical driving currents iv1 and iv2 to flow through the first and second vertical driving coils 33a and 34a. .

  When the first and second horizontal driving currents ih1 and ih2 flow in the first and second horizontal driving coils 31a and 32a, the first and second horizontal position detection and driving magnets 401b and 402b are connected to each other. The force that moves the movable part 30a in the first direction x in the opposite directions acts due to the electromagnetic force generated in. Thereby, the movable part 30a excluding the moving shaft 50a is rotated on a plane perpendicular to the third direction z.

  When the first and second vertical driving currents iv1 and iv2 flow in the first and second vertical driving coils 32a and 34a, the first and second vertical position detection and driving magnets 411b and 412b are connected. The force that moves the movable part 30a in the opposite directions in the second direction y is exerted by the electromagnetic force generated in. Thereby, the movable part 30a including the moving shaft 50a is rotated on a plane perpendicular to the third direction z.

The values of the first and second constant values c1 and c2 are preferably set so that rotation by horizontal driving and rotation by vertical driving are opposite to each other.

  In the present embodiment, the CPU 21 varies the first and second horizontal PWM duties dx1 and dx2 to change the first and second horizontal driving coils 31a and 32a through the driver circuit 29. A mode of controlling the second horizontal driving currents ih1 and ih2 will be described. The CPU 21 is directly connected to the first and second horizontal driving coils 31a and 32a, and the first and second horizontal driving currents ih1 and The form which controls ih2 may be sufficient. The same applies to the second direction y.

  The image blur correction unit 30 moves the imaging unit 39a to the position S to be moved calculated by the CPU 21, thereby eliminating the deviation of the optical axis LX on the imaging plane of the subject image caused by the blur and imaging with the subject image. This is a device that keeps the surface position constant and corrects image blur, and includes a movable part 30a including an imaging part 39a and a movable area, and a fixed part 30b. The image blur correction unit 30 includes a driving part that moves the movable part 30a by an electromagnetic force generated by the direction of the current flowing through the coil and the direction of the magnetic field of the magnet, and a position detection part that detects the position of the movable part 30a. It can be divided into two categories.

  Driving of the movable portion 30a of the image blur correction unit 30 in the first direction x is performed by electromagnetic waves generated by the first and second horizontal driving coils 31a and 32a, the first and second horizontal position detection and driving magnets 401b and 402b. Done by force. The movable portion 30a of the image blur correction unit 30 is driven in the second direction y by electromagnetic waves generated by the first and second vertical driving coils 33a and 34a, the first and second vertical position detection, and the driving magnets 411b and 412b. Done by force.

  The position P before or after the movement of the movable portion 30a moved by driving the driver circuit 29 is detected by the Hall element portion 44a and the Hall element signal processing circuit 45. Information on the detected position P is input to A / D2 and A / D3 of the CPU 21 as the first detection position signal px as the first direction x component and the second detection position signal py as the second direction y component, respectively. .

  The first direction x component and the second direction y component of the position P after A / D conversion with respect to the first and second detection position signals px and py are set to pdx and pdy, respectively. PID control is performed based on the data of the detected position P (pdx, pdy) and the data of the position S (sx, sy) to be moved.

  The values of the first and second horizontal driving currents ih1 and ih2 are obtained in proportion to the values of the first and second horizontal PWM duties dx1 and dx2. The values of the first and second vertical driving currents iv1 and iv2 are obtained in proportion to the values of the first and second vertical PWM duties dy1 and dy2.

  The movable part 30a includes first and second horizontal driving coils 31a and 32a, first and second vertical driving coils 33a and 34a, an imaging part 39a, a hall element part 44a as a magnetic field change detecting element part, and a movable part. It has a substrate 49a, a moving shaft 50a, first to third horizontal moving bearings 51a to 53a, and a plate 64a.

  The fixed portion 30b includes first and second horizontal position detection and drive magnets 401b and 402b, first and second vertical position detection and drive magnets 411b and 412b, and first and second horizontal position detection and drive. Yokes 421b and 422b, first and second vertical position detecting and driving yokes 431b and 432b, first to fourth vertical movement bearing portions 54b to 57b, and a base plate 65b.

  The details of the fixed portion 30b supporting the movable portion 30a so as to be movable in the first direction x and the second direction y will be described.

  The U-shaped moving shaft 50a viewed from the third direction z of the movable portion 30a is perpendicular to the first to fourth vertical moving bearing portions 54b to 57b attached to the base plate 65b of the fixed portion 30b. It is supported so as to be movable in the (second direction y). That is, the moving shaft 50a has a line segment parallel to the first direction x and a line segment parallel to the second direction y. The first and second vertical movement bearing portions 54b and 55b have a long hole shape extending in the second direction y when viewed from the first direction x. Thereby, the movable part 30a can move in the vertical direction with respect to the fixed part 30b.

  The moving shaft 50a is supported so as to be movable in the horizontal direction (first direction x) with the first to third horizontal moving bearing portions 51a to 53a of the movable portion 30a. Thereby, the movable part 30a excluding the moving shaft 50a can move in the horizontal direction with respect to the moving shaft 50a and the fixed part 30b.

  In order to make maximum use of the imaging range of the image sensor 39a1, when the optical axis LX of the photographic lens 67 is in a positional relationship passing through the vicinity of the center of the image sensor 39a1, the movable portion 30a is provided in both the first direction x and the second direction y. The positional relationship between the movable part 30a and the fixed part 30b is set so as to be located at the center of the movement range (at the movement center position). The center of the image sensor 39a1 refers to the intersection of two diagonal lines of a rectangle that forms the imaging surface of the image sensor 39a1.

  The movable unit 30a is attached with the imaging unit 39a, the plate 64a, and the first substrate 49a1 of the movable substrate 49a in the optical axis direction when viewed from the direction of the photographing lens 67. The imaging unit 39a includes an imaging device 39a1, a stage 39a2, a pressing unit 39a3, and an optical low-pass filter 39a4. The stage 39a2 and the plate 64a sandwich and urge the imaging device 39a1, the pressing unit 39a3, and the optical low-pass filter 39a4. The first to third horizontal movement bearing portions 51a to 53a are attached to the stage 39a2. The plate 64 a is positioned so that the image sensor 39 a 1 is perpendicular to the optical axis LX of the photographic lens 67 when the image sensor 39 a 1 is attached. Further, when the plate 64a is made of a metal material, the plate 64a is further brought into a heat radiation effect by being in contact with the image sensor 39a1.

  The movable substrate 49a includes a first substrate 49a1 on a plane perpendicular to the third direction z, and second to fifth substrates 49a2 to 49a5 attached perpendicular to the first substrate 49a1. The second and third substrates 49a2 and 49a3 are on a plane perpendicular to the second direction y, and these are in a positional relationship with the image sensor 39a1 sandwiched in the second direction y. The fourth and fifth substrates 49a4 and 49a5 are on a plane perpendicular to the first direction x, and are in a positional relationship with the image sensor 39a1 sandwiched in the first direction x.

  The second substrate 49a2 includes a first horizontal driving coil 31a in which a sheet-like and spiral coil pattern is formed, and the first horizontal hall element hh1 of the hall element portion 44a perpendicular to the second direction y. It is attached to the side opposite to the side where the image sensor 39a1 is present on a plane.

  The coil pattern of the first horizontal driving coil 31a is the first horizontal direction by the electromagnetic force generated from the current direction of the first horizontal driving coil 31a and the first horizontal position detection and the magnetic field direction of the driving magnet 401b. In order to move the movable portion 30a including the driving coil 31a in the first direction x, the movable portion 30a has a line segment parallel to the third direction z.

  The third substrate 49a3 is configured such that the second horizontal driving coil 32a in which a sheet-like and spiral coil pattern is formed and the second horizontal hall element hh2 of the hall element portion 44a are perpendicular to the second direction y. It is attached to the side opposite to the side where the image sensor 39a1 is present on a plane.

  The coil pattern of the second horizontal driving coil 32a is the second horizontal direction by the electromagnetic force generated from the current direction of the second horizontal driving coil 32a and the second horizontal position detection and the magnetic field direction of the driving magnet 402b. In order to move the movable part 30a including the driving coil 32a in the first direction x, the movable part 30a has a line segment parallel to the third direction z.

  In the fourth substrate 49a4, the first vertical driving coil 33a in which a sheet-like and spiral coil pattern is formed and the first vertical hall element hv1 of the hall element portion 44a are perpendicular to the first direction x. It is attached to the side opposite to the side where the image sensor 39a1 is present on a plane.

  The coil pattern of the first vertical driving coil 33a is the first vertical direction by the electromagnetic force generated from the current direction of the first vertical driving coil 33a and the first vertical position detection and the magnetic field direction of the driving magnet 411b. In order to move the movable portion 30a including the driving coil 33a in the second direction y, the movable portion 30a has a line segment parallel to the third direction z.

  The fifth substrate 49a5 is configured such that the second vertical driving coil 34a in which a sheet-like and spiral coil pattern is formed and the second vertical hall element hv2 of the hall element portion 44a are perpendicular to the first direction x. It is attached to the side opposite to the side where the image sensor 39a1 is present on a plane.

  The coil pattern of the second vertical driving coil 34a is the second vertical direction by the electromagnetic force generated from the current direction of the second vertical driving coil 34a and the second vertical position detection and the magnetic field direction of the driving magnet 412b. In order to move the movable part 30a including the driving coil 34a in the second direction y, the movable part 30a has a line segment parallel to the third direction z.

  The first and second horizontal hall elements hh1 and hh2 and the first and second vertical hall elements hv1 and hv2 included in the hall element unit 44a will be described later.

  The first and second horizontal driving coils 31a and 32a and the first and second vertical driving coils 33a and 34a are each formed with a spiral coil pattern from the outer peripheral portion of the winding toward the center. Sheet coil. Therefore, the thickness of the first and second horizontal driving coils 31a and 32a in the second direction y and the thickness of the first and second vertical driving coils 33a and 34a in the first direction x are reduced. Is possible.

  Further, in order to increase the electromagnetic force in the first direction x, even if each of the first and second horizontal driving coils 31a and 32a has a configuration in which a plurality of sheet coils are stacked in the second direction y, the second direction y The thickness of the film hardly increases. In order to increase the electromagnetic force in the second direction y, even if each of the first and second vertical driving coils 33a and 34a has a configuration in which a plurality of sheet coils are stacked in the first direction x, the thickness in the first direction x There is little increase.

  In the present embodiment, in the first horizontal driving coil 31a, sheet coils are stacked in two layers in the second direction y, and further, the first horizontal hall element hh1 is stacked in the second direction y (see FIG. 7). ). Similarly to the first horizontal driving coil 31a, the second horizontal driving coil 32a has a sheet coil laminated in two layers in the second direction y, and the second horizontal hall element hh2 has a second direction y. (Not shown). As with the first and second vertical driving coils 31a and 32a, the first and second vertical driving coils 33a and 34a are laminated in two layers in the first direction x. The second vertical hall elements hv1, hv2 are overlapped in the first direction x (not shown). However, the number of stacked first and second horizontal driving coils 31a and 32a and the first and second vertical driving coils 33a and 34a is not limited to two.

  The first and second horizontal driving coils 31a and 32a and the first and second vertical driving coils 33a and 34a are connected to a driver circuit 29 for driving them through a flexible substrate (not shown). The driver circuit 29 receives the first and second horizontal PWM duties dx1 and dx2 from the PWM0 and PWM1 of the CPU 21. The driver circuit 29 receives the first and second vertical PWM duties dy1 and dy2 from the PWM2 and PWM3 of the CPU 21. The driver circuit 29 supplies power to the first and second horizontal driving coils 31a and 32a in accordance with the input values of the first and second horizontal PWM duties dx1 and dx2, and causes the movable part 30a to be the first. Drive in direction x. The driver circuit 29 supplies power to the first and second vertical driving coils 33a and 34a in accordance with the input values of the first and second vertical PWM duties dy1 and dy2, and causes the movable part 30a to be second. Drive in direction y.

  The first horizontal position detecting and driving magnet 401b is attached to the fixed portion 30b so as to face the first horizontal driving coil 31a and the first horizontal hall element hh1 in the second direction y. That is, the first horizontal position detecting and driving magnet 401b and the first horizontal driving coil 31a are arranged along the second direction y. The first horizontal position detecting and driving magnet 401b and the first horizontal hall element hh1 are arranged along the second direction y.

  The second horizontal position detecting and driving magnet 402b is attached to the fixed portion 30b so as to face the second horizontal driving coil 32a and the second horizontal hall element hh2 in the second direction y. That is, the second horizontal position detecting and driving magnet 402b and the second horizontal driving coil 32a are arranged along the second direction y. The second horizontal position detecting and driving magnet 402b and the second horizontal hall element hh2 are arranged along the second direction y.

  The first and second horizontal position detection and drive magnets 401b and 402b have N and S poles arranged on a plane perpendicular to the second direction y and in the first direction x. In addition, the first horizontal position detection and driving magnet 401b and the second horizontal position detection and driving magnet 402b are in a positional relationship of sandwiching the movable portion 30a in the second direction y.

  The first vertical position detecting and driving magnet 411b is attached to the fixed portion 30b so as to face the first vertical driving coil 33a and the first vertical hall element hv1 in the first direction x. That is, the first vertical direction position detection and drive magnet 411b and the first vertical direction drive coil 33a are arranged along the first direction x. The first vertical position detecting and driving magnet 411b and the first vertical hall element hv1 are arranged along the first direction x.

  The second vertical position detecting and driving magnet 412b is attached to the fixed portion 30b so as to face the second vertical driving coil 34a and the second vertical hall element hv2 in the first direction x. That is, the second vertical position detecting and driving magnet 412b and the second vertical driving coil 34a are arranged along the first direction x. The second vertical position detection and drive magnet 412b and the second vertical hall element hv2 are disposed along the first direction x.

  The first and second vertical position detection and drive magnets 411b and 412b are arranged with N and S poles on a plane perpendicular to the first direction x and in the second direction y. In addition, the first vertical position detection and driving magnet 411b and the second vertical position detection and driving magnet 412b are in a positional relationship of sandwiching the movable portion 30a in the first direction x.

  The first horizontal position detection and drive magnet 401b is attached to the first horizontal position detection and drive yoke 421b attached on the base plate 65b of the fixed portion 30b and on the movable portion 30a side in the third direction z. . The length in the third direction z of the first horizontal position detection and drive magnet 401b is set to be longer than the first effective length L1 in the third direction z of the first horizontal drive coil 31a.

  The second horizontal position detection and drive magnet 402b is attached to the second horizontal position detection and drive yoke 422b attached to the movable part 30a side on the base plate 65b of the fixed part 30b in the third direction z. . The length in the third direction z of the second horizontal position detection and driving magnet 402b is set to be longer than the first effective length L1 in the third direction z of the second horizontal driving coil 32a.

  The first vertical position detecting and driving magnet 411b is attached to the first vertical position detecting and driving yoke 431b attached to the movable part 30a side on the base plate 65b of the fixed part 30b in the third direction z. . The length of the first vertical direction position detection and driving magnet 411b in the third direction z is set to be longer than the first effective length L1 of the first vertical direction driving coil 33a in the third direction z.

  The second vertical position detecting and driving magnet 412b is attached to the second vertical position detecting and driving yoke 432b attached to the movable part 30a side on the base plate 65b of the fixed part 30b in the third direction z. . The length in the third direction z of the second vertical direction position detection and drive magnet 412b is set to be longer than the first effective length L1 in the third direction z of the second vertical direction drive coil 34a.

  The first horizontal position detecting and driving yoke 421b is formed of a polygonal soft magnetic material having a U-shape when viewed from the first direction x, and the first horizontal position detecting and driving magnet 401b, The first horizontal driving coil 31a and the first horizontal hall element hh1 are mounted on the base plate 65b of the fixed portion 30b so as to sandwich the first horizontal hall element hh1 in the second direction y. The portion of the first horizontal position detection and drive yoke 421b on the side in contact with the first horizontal position detection and drive magnet 401b prevents the magnetic field of the first horizontal position detection and drive magnet 401b from leaking to the surroundings. To play a role. The first horizontal position detecting and driving magnet 401b in the first horizontal position detecting and driving yoke 421b, the first horizontal driving coil 31a, and the portion facing the second substrate 49a2 are in the first horizontal direction. It plays the role of increasing the magnetic flux density between the position detecting and driving magnet 401b and the first horizontal driving coil 31a and between the first horizontal position detecting and driving magnet 401b and the first horizontal hall element hh1.

  The second horizontal position detecting and driving yoke 422b is formed of a polygonal soft magnetic material having a U-shape when viewed from the first direction x, and the second horizontal position detecting and driving magnet 402b, The second horizontal driving coil 32a and the second horizontal hall element hh2 are mounted on the base plate 65b of the fixed portion 30b so as to sandwich the second horizontal hall element hh2 in the second direction y. The portion of the second horizontal position detection and drive yoke 422b on the side in contact with the second horizontal position detection and drive magnet 402b prevents the magnetic field of the second horizontal position detection and drive magnet 402b from leaking to the surroundings. To play a role. The second horizontal position detecting and driving magnet 422b in the second horizontal position detecting and driving magnet 402b, the second horizontal driving coil 32a, and the portion facing the third substrate 49a3 are in the second horizontal direction. The position detecting and driving magnet 402b and the second horizontal driving coil 32a and the second horizontal position detecting and driving magnet 402b and the second horizontal hall element hh2 are increased.

  The first vertical position detecting and driving yoke 431b is formed of a polygonal soft magnetic material having a U-shape when viewed from the second direction y, and the first vertical position detecting and driving magnet 411b, The first vertical driving coil 33a and the first vertical hall element hv1 are mounted on the base plate 65b of the fixed portion 30b so as to sandwich the first vertical hall element hv1 in the first direction x. The portion of the first vertical position detecting and driving yoke 431b on the side in contact with the first vertical position detecting and driving magnet 411b prevents the magnetic field of the first vertical position detecting and driving magnet 411b from leaking to the surroundings. To play a role. The first vertical direction position detection and drive magnet 411b, the first vertical direction drive coil 33a, and the portion facing the fourth substrate 49a4 in the first vertical position detection and drive yoke 431b are in the first vertical direction. It serves to increase the magnetic flux density between the position detection and drive magnet 411b and the first vertical driving coil 33a, and between the first vertical position detection and drive magnet 411b and the first vertical hall element hv1.

  The second vertical position detecting and driving yoke 432b is formed of a polygonal soft magnetic material having a U-shape when viewed from the second direction y, and the second vertical position detecting and driving magnet 412b. The second vertical driving coil 34a and the second vertical hall element hv2 are mounted on the base plate 65b of the fixed portion 30b so as to be sandwiched in the first direction x. The portion of the second vertical position detection and drive magnet 432b on the side in contact with the second vertical position detection and drive magnet 412b prevents the magnetic field of the second vertical position detection and drive magnet 412b from leaking to the surroundings. To play a role. The second vertical position detection and driving magnet 412b, the second vertical driving coil 34a, and the portion facing the fifth substrate 49a5 in the second vertical position detection and driving yoke 432b are in the second vertical direction. It serves to increase the magnetic flux density between the position detection and drive magnet 412b and the second vertical drive coil 34a, and between the second vertical position detection and drive magnet 412b and the second vertical hall element hv2.

  In the image blur correction operation, the moving direction of the movable portion 30a in the first direction x by the electromagnetic force generated between the first horizontal driving coil 31a and the first horizontal position detection and driving magnet 401b, and the second Winding direction of the coil so that the moving direction of the movable portion 30a in the first direction x by the electromagnetic force generated between the horizontal moving coil 32a and the second horizontal position detecting and driving magnet 402b is the same. The arrangement of the N and S poles of the magnet is set.

  In the image blur correction operation, the moving direction of the movable portion 30a in the second direction y by the electromagnetic force generated between the first vertical driving coil 33a and the first vertical position detection and driving magnet 411b, and the second Winding direction of the coil so that the moving direction in the second direction y of the movable portion 30a by the electromagnetic force generated between the vertical moving coil 34a and the second vertical position detecting and driving magnet 412b is the same. The arrangement of the N and S poles of the magnet is set.

  When the image blur correction operation is not performed, the movable portion 30a is moved in the first direction x and in the reverse direction by the first and second horizontal driving currents ih1 and ih2 flowing through the first and second horizontal driving coils 31a and 32a. Electromagnetic force that moves is generated. Due to this electromagnetic force, the movable portion 30a excluding the moving shaft 50a rotates on a plane perpendicular to the third direction z (see FIG. 8). The central axis of rotation is near the center between the first and second horizontal driving coils 31a and 32a. The movable portion 30a excluding the moving shaft 50a is rotated by the clearance between the first to third horizontal moving bearing portions 51a to 53a and the moving shaft 50a, and the first to third horizontal moving bearings are rotated. It is fixed by the frictional force between the parts 51a to 53a and the moving shaft 50a. FIG. 8 shows a state of rotating in the counterclockwise direction when viewed from the side opposite to the side where the taking lens 67 is present in the third direction z.

  Further, the first and second vertical driving currents iv1 and iv2 flowing through the first and second vertical driving coils 33a and 34a generate an electromagnetic force that moves the movable portion 30a in the second direction y and in the opposite direction. . Due to this electromagnetic force, the movable portion 30a including the moving shaft 50a rotates on a plane perpendicular to the third direction z (see FIG. 9). The central axis of rotation is near the center between the first and second vertical driving coils 33a and 34a. The movable portion 30a including the moving shaft 50a is rotated by the clearance between the moving shaft 50a and the first to fourth vertical moving bearing portions 54b to 57b, and the moving shaft 50a and the first to fourth shafts are moved. It is fixed by the frictional force between the vertical movement bearing portions 54b to 57b. FIG. 9 shows a state of rotating in the clockwise direction when viewed from the side opposite to the side where the taking lens 67 is present in the third direction z.

  In the present embodiment, since the rotation by the horizontal coil or the like and the rotation by the vertical coil or the like are set in the opposite direction, the image sensor 39a1 included in the movable portion 30a has almost no inclination due to the rotation. Does not occur.

  Also, when the rotation by the horizontal coil and the rotation by the vertical coil are set to be the same direction, either the rotation by the horizontal coil or the rotation by the vertical coil, etc. If not performed, the imaging element 39a1 also rotates and tilts due to the rotation of the movable portion 30a. However, the photographer unconsciously adjusts the tilt caused by the rotation while viewing the through image displayed on the LCD monitor 17. This is because the clearance between the shaft and the bearing is very small and the amount of rotation is also small. When only rotation by a horizontal coil or the like or rotation by a vertical coil or the like is performed, normal PID control is performed on the coil that has not been rotated, and the movable portion 30a is fixed.

  The movable portion 30a is fixed by the frictional force between the driving force D of the coil that generates the electromagnet and the moving shaft 50a. Therefore, compared with the case where the movable part 30a is fixed only by the driving force D of the coil, less driving force is required, so that power consumption can be suppressed.

  The Hall element unit 44a includes four Hall elements that are magnetoelectric conversion elements utilizing the Hall effect, and a current position P (first detection position signal px, first detection position signal px, second direction y) of the movable unit 30a in the first direction x and the second direction y. 2 is a uniaxial Hall element that detects a detection position signal py). Among the four Hall elements, the Hall element for position detection in the first direction x is used as the first and second horizontal Hall elements hh1, hh2, and the position detection in the second direction y as two horizontal magnetic field change detection elements. The Hall elements are first and second vertical Hall elements hv1 and hv2 as two vertical magnetic field change detection elements.

  The first horizontal hall element hh1 is mounted on the second substrate 49a2 of the movable part 30a as viewed from the second direction y, and at a position facing the first horizontal position detection and driving magnet 401b of the fixed part 30b. It is done. The second horizontal hall element hh2 is mounted on the third substrate 49a3 of the movable part 30a when viewed from the second direction y, and at a position facing the second horizontal position detecting and driving magnet 402b of the fixed part 30b. It is done.

  The first vertical hall element hv1 is mounted on the fourth substrate 49a4 of the movable portion 30a when viewed from the first direction x and at a position facing the first vertical position detection and driving magnet 411b of the fixed portion 30b. It is done. The second vertical hall element hv2 is mounted on the fifth substrate 49a5 of the movable part 30a as viewed from the first direction x and at a position facing the second vertical position detection and driving magnet 412b of the fixed part 30b. It is done.

  The first and second horizontal hall elements hh1 and hh2 are arranged in the windings of the first and second horizontal driving coils 31a and 32a, and particularly arranged near the center with respect to the first direction x. desirable. The first and second vertical hall elements hv1 and hv2 are preferably arranged in the windings of the first and second vertical driving coils 33a and 34a, particularly in the vicinity of the center in the second direction y. . The first and second horizontal position detection and drive magnets 401b and 402b, the first and second vertical position detection and the first and second horizontal position detection used for both the movement and the position detection of the movable part 30a by arranging in the winding. The drive magnets 411b and 412b can be downsized. Furthermore, the moving range of the movable part 30a and the center of the position detection range can be matched, and both ranges can be used efficiently.

  The portion of the movable substrate 49a where the first horizontal hall element hh1 is located, that is, the second substrate 49a2, has two layers of the first horizontal driving coil 31a and one layer of the first horizontal hall element hh1 (see FIG. 7). In the portion of the movable substrate 49a where the second horizontal hall element hh2 is provided, that is, the third substrate 49a3, two layers of the second horizontal driving coil 32a and one layer of the second horizontal hall element hh2 are laminated. The portion of the movable substrate 49a where the first vertical hall element hv1 is located, that is, the fourth substrate 49a4, is formed by laminating two layers of the first vertical driving coil 33a and one layer of the first vertical hall element hv1. In the portion of the movable substrate 49a where the second vertical hall element hv2 is located, that is, the fifth substrate 49a5, two layers of the second vertical driving coil 34a and one layer of the second vertical hall element hv2 are laminated. The second to fifth substrates 49a2 to 49a5 are multilayer substrates.

  In order to perform position detection by making the most of the range in which position detection with high accuracy can be performed using a linear change amount, the position of the first horizontal hall element hh1 in the first direction x is near the center of the image sensor 39a1. Are in the vicinity of the same distance from the N and S poles of the first horizontal position detection and drive magnet 401b when the position is in a positional relationship passing through the optical axis LX. Similarly, the position of the second horizontal hall element hh2 in the first direction x is N in the second horizontal position detection and driving magnet 402b when the vicinity of the center of the image sensor 39a1 passes through the optical axis LX. It is desirable that the poles and S poles be in the vicinity of the same distance.

  The position in the second direction y of the first vertical hall element hv1 is in the vicinity of the center of the image sensor 39a1 in order to perform position detection by making the most of the range in which position detection with high accuracy can be performed using the linear change amount. Are in the vicinity of the same distance from the north pole and south pole of the first vertical position detection and drive magnet 411b. Similarly, the position of the second vertical hall element hv2 in the second direction y is N when the position of the second vertical direction position detection and drive magnet 412b is determined when the vicinity of the center of the image sensor 39a1 passes through the optical axis LX. It is desirable that the poles and S poles be in the vicinity of the same distance.

  When the vicinity of the center of the image sensor 39a1 is in a positional relationship passing through the optical axis LX, the second of the first horizontal hall element hh1 and the first horizontal driving coil 31a and the first horizontal position detection and driving magnet 401b. The first distance d1 in the direction y and the second distance d2 in the second direction y between the second horizontal hall element hh2 and the second horizontal driving coil 32a and the second horizontal position detection and driving magnet 402b. The positions of the first and second horizontal hall elements hh1, hh2 in the second direction y are set so as to be equal. At this time, the distance in the second direction y between the first horizontal position detection and drive magnet 401b and the vicinity of the center of the image sensor 39a1, and the second horizontal position detection and drive magnet 402b and the center of the image sensor 39a1. It is desirable to set the positional relationship between the movable portion 30a and the fixed portion 30b so that the distance in the second direction y with the vicinity is equal.

  Thereby, it becomes possible to arrange | position position detection members, such as a Hall element and a magnet, substantially symmetrically with respect to the 2nd direction y across the optical axis LX. Further, it becomes possible to dispose drive members such as coils and magnets almost symmetrically with the optical axis LX separated from the positional relationship between the Hall element and the coil.

  When the vicinity of the center of the imaging element 39a1 is in a positional relationship passing through the optical axis LX, the first vertical hall element hv1, the first vertical driving coil 33a, and the first vertical position detection and driving magnet 411b A third distance d3 in the direction x, and a fourth distance d4 in the first direction x between the second vertical hall element hv2 and the second vertical driving coil 34a and the second vertical position detection and driving magnet 412b. The positions of the first and second vertical hall elements hv1, hv2 in the first direction x are set so as to be equal. At this time, the distance in the first direction x between the first vertical position detection and drive magnet 411b and the vicinity of the center of the image sensor 39a1, and the second vertical position detection and drive magnet 412b and the center of the image sensor 39a1. It is desirable to set the positional relationship between the movable portion 30a and the fixed portion 30b so that the distance in the first direction x with the vicinity is equal.

  Thereby, it becomes possible to arrange | position position detection members, such as a Hall element and a magnet, substantially symmetrically with respect to the 1st direction x across the optical axis LX. Further, it becomes possible to dispose drive members such as coils and magnets almost symmetrically with the optical axis LX separated from the positional relationship between the Hall element and the coil.

  The base plate 65b is a plate-like member that serves as a base to which the first and second horizontal position detection and drive yokes 421b and 422b are attached in the fixed portion 30b, and is arranged in parallel with the imaging surface of the imaging device 39a1. In the present embodiment, the base plate 65b is closer to the photographing lens 67 than the movable substrate 49a in the third direction z, but the positional relationship is such that the movable substrate 49a is closer to the photographing lens 67. There may be.

  First horizontal driving coil 31a and second horizontal driving coil 32a, first vertical driving coil 33a and second vertical driving coil 34a, first horizontal position detecting and driving magnet 401b and second Horizontal position detection and drive magnet 402b, first vertical position detection and drive magnet 411b and second vertical position detection and drive magnet 412b, first horizontal position detection and drive yoke 421b and second horizontal direction. Position detection and drive yoke 422b, first vertical position detection and drive yoke 431b and second vertical position detection and drive yoke 432b, first horizontal hall element hh1 and second horizontal hall element hh2, first The vertical hall element hv1 and the second vertical hall element hv2 have the same characteristics. This is for the purpose of driving and detecting the position of the movable portion 30a with high accuracy along the moving direction of the moving shaft 50a, that is, the first direction x and the second direction y.

  The hall element signal processing circuit 45 detects the first horizontal potential difference x1 between the output terminals of the first horizontal hall element hh1 from the output signal of the first horizontal hall element hh1, and outputs the second horizontal hall element hh2. A first detection position for detecting a second horizontal potential difference x2 between the output terminals of the second horizontal hall element hh2 from the signal, and multiplying the average value by a constant amplification factor to identify the position in the first direction x A first hall element signal processing circuit 450 that outputs the signal px to the A / D 2 of the CPU 21 is provided.

  The hall element signal processing circuit 45 detects the first vertical potential difference y1 between the output terminals of the first vertical hall element hv1 from the output signal of the first vertical hall element hv1, and the second vertical hall element hv2 A second vertical potential difference y2 between the output terminals of the second vertical hall element hv2 is detected from the output terminal, and a position in the second direction y is specified by multiplying these average values by a constant amplification factor. And a second Hall element signal processing circuit 460 for outputting the detection position signal py to the A / D 3 of the CPU 21.

  In the present embodiment, the members for performing the image blur correction operation are arranged on a plane perpendicular to the first direction x or on a plane perpendicular to the second direction y, that is, in the third direction z. As a result, the arrangement of the members for performing the image blur correction operation on the plane perpendicular to the third direction z is reduced, so that the image blur correction device does not increase in size in the plane direction perpendicular to the third direction z.

  In the third direction z, many members for performing the image blur correction operation are arranged. In the third direction z, the photographing lens 67, the image sensor 39a1, and the like are originally arranged. Even if a member for performing the image blur correction operation is arranged around the periphery, it does not cause a large size of the entire imaging apparatus. Accordingly, it is possible to reduce the size of the image pickup apparatus including the image blur correction apparatus as compared with the conventional technique. In particular, the effect is remarkable in an imaging apparatus having a configuration that is long in the third direction z, such as an imaging apparatus with a zoom lens.

  Further, by arranging drive members such as a coil and a magnet almost symmetrically with respect to one correction direction with the optical axis LX therebetween, high-precision urging along the moving shaft 50a can be performed. Thereby, the drive resistance of the movable part 30a can be suppressed, and power saving and high followability to drive can be obtained.

  Further, when the movable portion 30a is moved in the second direction y, the first distance d1 between the first horizontal position detection and driving magnet 401b and the first horizontal hall element hh1, and the second horizontal position. The second distance d2 between the detection and drive magnet 402b and the second horizontal hall element hh2 changes. Similarly, when the movable portion 30a is moved in the first direction x, the third distance d3 between the first vertical position detection and driving magnet 411b and the first vertical hall element hv1, and the second vertical direction The fourth distance d4 between the position detection and drive magnet 412b and the second vertical hall element hv2 changes. When the distance between the magnet and the Hall element changes, the magnetic flux density between them changes, so that the value of the output signal of each Hall element also changes.

  In the present embodiment, the average value of the first horizontal potential difference x1 that is the output value from the first horizontal hall element hh1 and the second horizontal potential difference x2 that is the output value from the second horizontal hall element hh2 is obtained. A value obtained by multiplying the constant amplification factor is set as a first detection position signal px as a first direction x component of the detected position P information of the movable part 30a. Accordingly, it is possible to accurately detect the position in the first direction x in consideration of the movement of the movable part 30a in the second direction y.

  Similarly, the average value of the first vertical potential difference y1 that is the output value from the first vertical hall element hv1 and the second vertical potential difference y2 that is the output value from the second vertical hall element hv2 is constant. A value obtained by multiplying the amplification factor is set as a second detection position signal py as a second direction y component of the detected information on the position P of the movable part 30a. Accordingly, it is possible to accurately detect the position in the second direction y in consideration of the movement of the movable part 30a in the first direction x.

  Next, the procedure of image blur correction processing performed independently of other operations as interrupt processing at regular time intervals (1 ms) will be described with reference to the flowchart of FIG.

  When the image blur correction process interrupt operation starts in step S11, the first and second angular velocities vx and vy output from the angular velocity detection unit 25 in step S12 are converted to A via the A / D0 and A / D1 of the CPU 21, respectively. / D converted and input. In step S13, the first and second detected position signals px and py detected by the Hall element unit 44a and calculated by the Hall element signal processing circuit 45 are A / D converted via the A / D2 and A / D3 of the CPU 21. The current position P (pdx, pdy) is obtained.

  In step S14, it is determined whether IS = 0. When IS = 0, that is, when the correction mode is not set, the movable portion 30a is fixed in step S15. Fixing is performed by rotation by electromagnetic force of the first and second horizontal driving coils 31a and 32a. When fixed, the 1 ms timer interrupt processing is terminated. In the case of IS = 1, that is, in the correction mode, in step S16, the position S (sx, sy) to which the movable part 30a should move is calculated and set from the first and second angular velocities vx, vy obtained in step S12.

  In step S17, the driving force D required for the movement of the movable portion 30a from the position S (sx, sy) and the current position P (pdx, pdy) set in step S15 or step S16, that is, for the first and second horizontal driving. First and second horizontal PWM duties dx1 and dx2 and first and second vertical PWM duties dy1 and dy2 required to drive the coils 31a and 32a, the first and second vertical driving coils 33a and 34a Is calculated. In step S18, the first and second horizontal direction PWM duties dx1 and dx2, the first and second vertical direction PWM duties dy1 and dy2, and the first and second horizontal direction driving coils 31a and 32a and the first through the driver circuit 29. Then, the second vertical driving coils 33a and 34a are driven to move the movable portion 30a, and the 1 ms timer interruption process is completed. The operations in steps S17 and S18 are automatic control calculations used in PID automatic control that performs general proportional, integral, and differential calculations.

  In the present embodiment, the configuration in which the position detecting magnet and the driving magnet are shared in each of the first direction x and the second direction y has been described.

  Further, the position detecting hall element 44a is connected to the movable portion 30a, and position detecting magnets (first and second horizontal position detecting and driving magnets 401b and 402b, first and second vertical position detecting and driving). The configuration in which the magnets 411b and 412b) are disposed on the fixed portion 30b has been described. However, the configurations of the movable portion 30a and the fixed portion 30b are reversed, that is, the movable portion 30a is a position detection magnet, and the fixed portion 30b is a Hall element. The form which has a part may be sufficient.

  Further, any of the magnets as a device for generating a magnetic field may be a magnet that always generates a magnetic field or an electromagnet that generates a magnetic field as necessary.

  Further, the first and second horizontal driving coils 31a and 32a are opposed to the first and second horizontal position detecting and driving magnets 401b and 402b in the second direction y, and the first and second vertical directions. Although the embodiment has been described in which the driving coils 33a and 34a face the first and second vertical position detection and driving magnets 411b and 412b in the first direction x, the positional relation is not limited thereto. The same effect can be obtained even with an image blur correction device in which the coil and the magnet are in a positional relationship in which they face each other in the third direction z.

  Further, the mode in which the movable portion 30a including the imaging device 39a1 can be moved in the plane direction perpendicular to the optical axis for the image blur correction operation has been described. However, the purpose of making the movable portion 30a movable is the image blur correction operation. Is not limited.

  Further, although the position detection by the Hall element unit 44a using the Hall element as the magnetic field change detection element has been described, another detection element may be used as the magnetic field change detection element. Specifically, an MI sensor (high frequency carrier type magnetic field sensor) capable of obtaining the position detection information of the movable part by detecting a change in the magnetic field, a magnetic resonance type magnetic field detection element, an MR element (magnetoresistance effect element) The same effect as that of the present embodiment using the Hall element can be obtained.

It is the perspective view seen from the back which shows the appearance of the imaging device in this embodiment. It is a front view of an imaging device. It is a circuit block diagram of an imaging device. It is a block diagram of an image blur correction part. FIG. 5 is a configuration diagram of the image blur correction unit of FIG. 4 as viewed from the second horizontal position detection and drive yoke side in the second direction. It is a block diagram of the cross section in the AA of FIG. It is a perspective view which shows the structure of the 1st horizontal direction driving coil, the 1st horizontal direction Hall element, and the 1st horizontal direction position detection and a driving magnet. It is a block diagram of an image shake correction | amendment part when the movable part except a shaft for movement is rotated. FIG. 9 is a configuration diagram of an image blur correction unit when the movable unit including the moving shaft is further rotated in the reverse direction from the state of FIG. 8. It is a flowchart of an image blur correction process performed as an interrupt process at regular intervals.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Imaging device 11 Pon button 12a Metering switch 13 Release button 13a Release switch 14 Image blur correction button 14a Image blur correction switch 17 LCD monitor 21 CPU
22 imaging block 23 AE unit 24 AF unit 25 angular velocity detection unit 26, 27 first and second angular velocity sensor 28 amplifier / high pass filter circuit 29 driver circuit 30 image blur correction unit 30a movable unit 30b fixed unit 31a, 32a first, first Two horizontal driving coils 33a, 34a First and second vertical driving coils 39a Imaging unit 39a1 Imaging element 39a2 Stage 39a3 Holding unit 39a4 Optical low-pass filter 401b, 402b First and second horizontal position detection and driving magnets 411b, 412b First and second vertical position detection and drive magnets 421b and 422b First and second horizontal position detection and drive yokes 431b and 432b First and second vertical position detection and drive yokes 45 Holes Element signal processing circuit 49a Movable substrate 49a1-4 9a5 First to fifth substrates 50a Movement shafts 51a to 53a First to third horizontal movement bearing portions 54b to 57b First to fourth vertical movement bearing portions 64a Plate 65b Base plate 67 Shooting lens dx1, dx2 First , Second horizontal PWM duty dy1, dy2 first, second vertical PWM duty hh1, hh2 first, second horizontal hall element hv1, hv2 first, second vertical hall element LX optical axis px of the taking lens , Py first and second detection position signals vx, vy first and second angular velocities

Claims (9)

An image sensor, a first direction perpendicular to the optical axis of the photographing lens with respect to the image sensor, and a movable part movable in a second direction perpendicular to the optical axis and the first direction;
A fixed portion that movably supports the movable portion in the first and second directions;
The movable portion and the fixed portion include first and second horizontal driving means for moving the movable portion in a first direction, and first and second vertical direction driving means for moving the movable portion in a second direction. Have
Control means for controlling the first and second horizontal driving means, the first and second vertical driving means,
The control means generates a force for moving the movable part in the opposite direction to at least one of the first and second horizontal driving means or the first and second vertical driving means, and the movable part An image pickup apparatus characterized by rotating and fixing on a plane perpendicular to the optical axis.   2. The friction force is generated between the movable part and the member that supports the movable part included in the movable part or the fixed part movably in the first direction or the second direction by the rotation. Imaging device. The movable portion is a member that supports the movable portion in the first direction, and includes a moving shaft having a line segment parallel to the first direction, a line segment parallel to the second direction, and a movable shaft excluding the moving shaft. And a horizontal bearing portion that is included in the portion and supports the moving shaft so as to be movable in the first direction,
3. The imaging according to claim 2, wherein the fixed portion includes a vertical bearing portion that supports the moving shaft in a second direction as a member that supports the movable portion in the second direction. apparatus.   The imaging apparatus according to claim 2, wherein the amount of rotation of the movable part is substantially the same as the amount of clearance between members that support the movable part.   The imaging apparatus according to claim 1, wherein absolute values of values of the forces that move the movable part in the opposite directions are equal.   The direction of rotation of the movable part by the first and second horizontal direction driving means is opposite to the direction of rotation of the movable part by the first and second vertical direction driving means. The imaging apparatus according to 1. One of the movable part and the fixed part has first and second horizontal driving coils as the first and second horizontal driving means, and the first and second vertical driving means are first. , Having a second vertical driving coil,
The other of the movable part and the fixed part has first and second horizontal driving magnets as the first and second horizontal driving means, and first as the first and second vertical driving means. , Having a second vertical driving magnet,
The imaging apparatus according to claim 1, wherein the force that moves the movable part is an electromagnetic force.   The first horizontal driving coil and the first horizontal driving magnet are opposed to each other in the second direction, and the second horizontal driving coil and the second horizontal driving magnet are second. The first vertical driving coil and the first vertical driving magnet are opposed to each other in the first direction, and the second vertical driving coil and the second vertical are arranged to face each other in the first direction. The imaging device according to claim 7, wherein the imaging device is in a positional relationship facing the direction driving magnet in the first direction. By moving the movable portion in the first and second directions, the optical axis shift in the imaging plane of the subject image caused by blurring is eliminated, and the position of the subject image and the imaging plane is kept constant. Performs image stabilization and
2. The imaging according to claim 1, wherein when the main power is on and the image blur correction operation is not performed, the control unit generates a force that moves the movable part in the opposite directions. apparatus.

Images