JP2017138564A - Image tremor correction device and imaging device having image tremor correction device applied - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable image tremor correction device.SOLUTION: An image tremor correction device comprises: a stationary frame 22; a movable frame 14 that holds an optical lens 14a; a support member 31 that movably supports the movable frame with respect to the stationary frame in an in-plane orthogonal to an optical axis of the optical lens; a drive unit 25 that includes magnets 27x and 27y as well as coils 26x and 26y to drive the movable frame with respect to the stationary frame; control units 50x and 50y that perform drive control of the drive unit; a position detection unit 57 that detects a position of the movable frame in the in-plane; and a judgement unit 59 that when the control unit performs the drive control so as to move the movable frame to a prescribed target position, detects a deviation between the position of the movable frame to be detected by the position detection unit and the prescribed target position and judges whether the image tremor correction device 20 normally operates on the basis of whether the deviation falls within a first allowance range. When it is judged by the judgement unit that the image tremor correction device 20 does not normally operate, the control unit is configured to restrict an operation of the device.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an image shake correction apparatus including a mechanism for correcting an image shake of an optical image formed by an image pickup optical system, and an image pickup apparatus to which the image shake correction apparatus is applied.

  Conventionally, an optical image formed by an imaging optical system is sequentially photoelectrically converted using an imaging device or the like, and an image signal obtained thereby is converted into image data (still image) or video data (moving image) in a predetermined form. An image pickup apparatus configured to be stored in a recording medium and configured to be able to transmit the acquired image signal to an image display apparatus and sequentially display the image signal is in practical use.

  Also, in recent years, for the purpose of fixed-point observation, monitoring, or crime prevention, this type of imaging device can be fixedly installed outdoors, indoors, etc., so that the situation of the area or space to be imaged can be constantly monitored. Various types of camera systems are widely used.

  Further, in this type of camera system, a network camera system in which an imaging device, a terminal device, an image display device, and the like are connected to an existing network such as the Internet has been put into practical use. In this network camera system, when the user (user) operates the terminal device, the imaging device can be remotely operated via the network, and image data and video data acquired by the imaging device are stored. An image is received by the terminal device via the network, and an image based on the received image data or video data is displayed and confirmed using an image display device connected to the terminal device.

  Still further, when an imaging device having the same form as that applied in the network camera system or the like is fixedly installed in a vehicle or the like, for example, a blind spot is formed from the driver's seat such as a rear region or a side region of the vehicle. By displaying an image of the state of the area on an image display device installed inside the vehicle, or by continuing to image the surrounding area of the vehicle during vehicle operation, a predetermined time (for example, an abnormal impact (so-called accident) So that moving image data for a predetermined time before and after the occurrence point) is recorded on a recording medium and used for controlling the lane keeping function and the emergency stop function using the acquired front view image and the like. Various in-vehicle camera systems have been put into practical use and are widely used.

  An imaging apparatus applied to a camera system or the like in these forms is fixedly installed in a place where a user (user) cannot easily reach, for example, outdoors, indoors, inside or outside a vehicle, and the like. In many cases, continuous operation is performed for a long time in a fixed state.

  On the other hand, in an imaging apparatus applied to a camera system or the like of these forms, for example, an optical image formed by an imaging optical system is generated due to a phenomenon such as the imaging apparatus shaking during execution of an imaging operation. 2. Description of the Related Art In general, an imaging apparatus including an image blur correction apparatus configured to correct so-called image blur that becomes unstable on a light receiving surface of an image sensor has been put into practical use.

  As a form of this type of image blur correction device, for example, a so-called image blur correction is performed by moving a part of optical lenses constituting the image pickup optical system in a plane orthogonal to the optical axis O of the image pickup optical system. A lens shift type optical image shake correction mechanism and a so-called sensor that performs image shake correction by moving the image sensor in a plane along the light receiving surface (in a plane orthogonal to the optical axis O of the image pickup optical system), for example. There is a shift type optical image shake correction mechanism.

  As described above, since the image pickup apparatus in the network camera system or the like is operated continuously for a long time, the image blur correction apparatus or the like always operates.

  In an imaging apparatus in a conventional network camera system or the like, for example, an apparatus including an abnormality detection unit that detects an abnormality of a device such as a state of the imaging apparatus in response to a remote operation from the terminal device side, for example, whether there is a malfunction, Various proposals have been made by Japanese Patent No. 3738682.

  The apparatus abnormality detection system disclosed in the above Japanese Patent No. 3738682 and the like determines a plurality of local terminals to be managed and occurrence of abnormality including a failure of the local terminals installed in the installation facilities of these local terminals. The abnormality determining device and the local terminal installation facility are provided with a management side terminal provided at a remote location, and the local terminal functions in response to a request from the abnormality determining device to diagnose the state of the local terminal. Along with the self-diagnostic means for notifying the abnormality determination apparatus of the diagnosis result, the abnormality determination apparatus receives a request from the management-side terminal, and requests the local terminal to execute diagnosis by the self-diagnosis means; When the diagnosis result is received from the local terminal and an abnormality occurrence or sign is detected in the local terminal from the diagnosis result, the management side Is a function of notifying the abnormality to the end.

Japanese Patent No. 3738682

  However, in the apparatus abnormality detection system disclosed by the above Japanese Patent No. 3738682, etc., a diagnosis of the state of the local terminal is executed in response to a request from the management terminal, and the occurrence of an abnormality or its sign is detected. The management side terminal is notified of this. Therefore, when an abnormality or the like is detected in the local terminal, the details of the state of the local terminal, for example, the type of failure or the location of the failure, etc., after the notification of the occurrence of an abnormality is received, the work of the worker etc. to investigate again I need it. For this reason, there is a problem that when a failure occurs in the local terminal, it is not possible to quickly respond.

  For example, when an imaging device as a local terminal in a network camera system is operated as a surveillance camera or the like, if a malfunction occurs in the local terminal and the function stops, an image is displayed during the stop period. I can't get it. Therefore, it is desirable not to stop the function even if a malfunction or the like occurs. In addition, when the function is stopped, the quickest possible response is required.

  In general, malfunctions and breakdowns of equipment and the like occur suddenly and are difficult to predict. In particular, in a device in which continuous operation is performed for a long time, there is a tendency that the possibility of malfunction or failure increases as the operation time increases. In consideration of this, it is convenient if the operation of the device can be confirmed periodically. Even if a failure occurs, it is possible to continue operation without stopping all functions as long as a minimum function in a normal part other than the failure occurrence point is secured.

  For example, the means disclosed in Japanese Patent No. 3738682 and the like can also be applied to a local terminal (imaging device) provided with the lens shift type image blur correction device. In that case, for example, when a malfunction occurs in which the image blur correction lens of the local terminal (imaging device) is shifted from the normal reference position, if it is operated as it is, the image quality of the acquired image is as a result. There is a problem that it becomes deteriorated. In such a case, while maintaining the imaging function for image acquisition as the minimum function, the reference position of the image blur correction lens is maintained, and the system continues even if the image blur correction function is stopped. The operation is possible, and as a result, it is expected that a good image can be obtained.

  The present invention has been made in view of the above-described points, and an object of the present invention is to limit means and operations capable of accurately grasping in advance the possibility of a malfunction or failure in the image blur correction apparatus. The present invention provides an image shake correction apparatus that includes a unit and can construct a highly reliable camera system, and an imaging apparatus to which the image shake correction apparatus is applied.

  In order to achieve the above object, an image shake correction apparatus according to one embodiment of the present invention includes a movable frame that holds an optical lens or an imaging element, and the movable frame is orthogonal to the optical axis of the optical lens with respect to the fixed frame. A support member that is movably supported in a plane or in a plane along the light receiving surface of the image sensor, a drive unit that has a magnet and a coil and drives the movable frame with respect to the fixed frame, and drive control of the drive unit A control unit that performs the control, a position detection unit that detects the position of the movable frame in the plane, and the control unit that drives and controls the movable frame to move to a predetermined target position via the drive unit. When the deviation between the position of the movable frame detected by the position detection unit and the predetermined target position is detected, the apparatus operates normally based on whether the deviation is within an allowable range. Whether or not In the image shake correction apparatus including the determination unit, the control unit restricts the operation of the image shake correction apparatus when the determination unit determines that the apparatus is not operating normally. To do.

  In addition, an imaging device to which the image blur correction device of one embodiment of the present invention is applied includes a camera unit having an imaging element and an imaging optical system, a housing that houses the camera unit therein, and a part of the camera unit. A cover member for covering and protecting the image blur correction apparatus;

  According to the present invention, there is provided an image shake correction apparatus that is capable of constructing a highly reliable camera system, including means capable of accurately grasping in advance the possibility of a malfunction or failure in the image shake correction apparatus and a means for limiting the operation. In addition, it is possible to provide an imaging apparatus to which the image blur correction apparatus is applied.

1 is an external perspective view schematically showing the external appearance of an imaging apparatus according to a first embodiment of the present invention. The principal part expansion perspective view which takes out and expands and shows the main component part (camera unit) in the imaging device of FIG. FIG. 2 is a longitudinal sectional view of a cross section taken along the plane indicated by reference numeral [3A] in FIG. FIG. 2 is an external perspective view showing the main components of the camera unit shown in FIGS. 4 is an exploded perspective view showing the image blur correction apparatus of FIG. 4 in an exploded manner. Block configuration diagram showing main components of an image blur correction controller in the image blur correction apparatus of the present embodiment The figure which shows the specific example of the data (movement target value) of the instruction value for self-diagnosis in the image blurring correction apparatus of this embodiment. Main flowchart showing a processing sequence in the self-diagnosis mode in the image shake correction apparatus of the present embodiment. The flowchart which shows the detailed process sequence of the stop precision diagnostic process (step S1) and drive current diagnostic process (step S2) of FIG. Explanatory drawing of the stop precision diagnostic process (process of step S1 of FIG. 8) of FIG. The flowchart which shows the detailed process sequence of the sine wave follow-up accuracy diagnostic process (step S3) of FIG. Explanatory drawing of the sine wave follow-up accuracy diagnosis process (process of step S3 of FIG. 8) of FIG. The figure which shows the waveform of the deviation of the drive wave and substantial vibration wave which are shown in FIG. The figure which shows the specific example of the data (movement target value) of the instruction value for self-diagnosis in the image blur correction apparatus of the 2nd Embodiment of this invention. Main flowchart showing a processing sequence in the self-diagnosis mode in the image shake correction apparatus of the present embodiment. The flowchart which shows the detailed process sequence of the stop precision diagnostic process (step S1) of FIG. The flowchart which shows the detailed process sequence of the sine wave follow-up precision diagnostic process (step S3) of FIG.

  The present invention will be described below with reference to the illustrated embodiments. Each drawing used in the following description is schematically shown. In order to show each component in a size that can be recognized on the drawing, the dimensional relationship and scale of each member are different for each component. May be shown. Accordingly, the present invention is limited only to the illustrated embodiments with respect to the quantity of components, the shape of the components, the size ratio of the components, the relative positional relationship of the components, and the like described in the drawings. It is not something.

  The X axis shown in the drawings indicates a horizontal axis when viewed from the front, and the Y axis indicates a direction orthogonal to the X axis and a vertical axis when viewed from the front. The Z axis indicates an axis line in a direction that coincides with the optical axis O with respect to the optical axis O of the imaging optical system.

  1 to 13 are diagrams showing a first embodiment of the present invention. Among these, FIG. 1 is an external perspective view schematically showing the external appearance of the imaging apparatus of the present embodiment. FIG. 2 is an enlarged perspective view of the main part of the main component (camera unit) in the imaging apparatus of FIG. FIG. 3 is a longitudinal sectional view of a cross section taken along the plane indicated by reference numeral [3A] in FIG. 2 as viewed from the direction of arrow [3B].

  First, a schematic configuration of an imaging apparatus to which the image blur correction apparatus according to the first embodiment of the present invention is applied will be briefly described below mainly using FIGS.

  The image pickup apparatus 1 to which the image shake correction apparatus of the present embodiment is applied is fixedly installed on, for example, a ceiling, a wall surface, or a predetermined column or pedestal such as outdoors or indoors. The imaging device 1 is configured to be able to constantly monitor the area and space conditions to be imaged at the installation location. For example, an imaging device included in a network camera system for the purpose of fixed point observation, monitoring, crime prevention, or the like. It is.

  As shown in FIG. 1, the imaging device 1 is mainly configured by a housing 2, a cover member 3, a camera unit 10, and the like.

  The housing 2 is, for example, a substantially cylindrical shape, and is an exterior member that houses and arranges the camera unit 10 therein. The housing 2 is fixed to the ceiling 100, for example.

  The cover member 3 is formed of, for example, a substantially dome shape (hemispherical shape), and is a protection member that covers and protects a part of the camera unit 10 housed in the housing 2 and the front surface of the imaging optical system. The cover member 3 also serves to secure a moving space when the camera unit 10 changes the direction in which the optical axis O of the imaging optical system faces in order to change the imaging area inside the housing 2. .

  The camera unit 10 includes an imaging optical system (partially shown in FIG. 1, refer to reference numeral 11a), an image sensor (not illustrated in FIG. 1, refer to reference numeral 17a in FIG. 3), and the like, and has an imaging function. It is a constituent unit. The camera unit 10 can be directly connected via a wired cable or wireless communication means, or via a network (not shown), for example, a portable communication called a desktop type, a notebook type, a tablet type personal computer, a smartphone, or the like. Is connected to a terminal device (not shown) such as a mobile terminal device. Although not shown, an image display device (not shown) is connected to the terminal device, and the image display device receives image data and video data acquired by the camera unit 10. In addition to displaying images, videos, and the like, it is possible to display a control screen (menu screen) or the like when the camera unit 10 is remotely operated using the terminal device.

  As described above, the camera unit 10 is configured such that the direction in which the optical axis O of the imaging optical system faces can be changed in the internal space of the cover member 3. That is, the camera unit 10 is rotated in the pan direction (a horizontal turn and a turn around the Y axis in FIG. 1), which is a direction along the arrow RY shown in FIG. 360 degrees) and rotation in the tilt direction which is the direction along the arrow RX shown in FIG. 1 (vertical turning and turning along the XY plane of FIG. 1. The range of rotation is, for example, a rotation angle of about 90. A predetermined rotation drive mechanism (not shown) is provided so as to be possible.

  Note that the rotation drive mechanism of the camera unit 10 is a part not directly related to the present invention, so that the same one that has been put to practical use in the past is applied, and its illustration and description are as follows. Omitted.

  As shown in FIGS. 2 and 3, the camera unit 10 has an imaging optical system including a plurality of optical lenses (11a, 12a, 13a, 14a, and 15a; only part of them are shown in FIG. 2, mainly see FIG. 3). 2 and a plurality of lens group holding members (11, 12, 13, 14, 15; each holding a plurality of optical lenses (11a, 12a, 13a, 14a, 15a) for each predetermined group; The image blur that contributes to the image blur correction operation by moving a part of these lens group holding members in a plane orthogonal to the optical axis O (hereinafter referred to as the XY plane). An auto focus (AF) operation by moving the correction device 20 (not shown in FIG. 2; see FIG. 3) and another part of the lens group holding member in the direction along the optical axis O. Drive mechanism that contributes to zooming (Not shown), an aperture mechanism 18 (not shown in FIG. 2; see FIG. 3) for adjusting the light amount of the imaging light beam passing through the imaging optical system, and an imaging substrate 17 that mounts the imaging element 17a and drives the imaging element 17a. (Not shown in FIG. 2; see FIG. 3), and the above-described drive mechanism (not shown), electrical components including a plurality of flexible printed boards 16 and the like extended from the imaging board 17 and the like.

  The imaging optical system of the camera unit 10 exemplified in the present embodiment includes five lens groups including a first lens group 11a, a second lens group 12a, a third lens group 13a, a fourth lens group 14a, and a fifth lens group 15a. It is configured. Each lens group is held by a first lens group holding member 11, a second lens group holding member 12, a third lens group holding member 13, a fourth lens group holding member 14, and a fifth lens group holding member 15, respectively. .

  Among these, the 4th lens group holding member 14 becomes a form clamped with the main body member 22 and the cover member 21 which are the main structural members which comprise the image blurring correction apparatus 20 of this embodiment. In the image blur correction device 20 of the present embodiment, the fourth lens group holding member 14 holds the image blur correction drive unit 25 described later (see FIG. 4 and the like; including reference numerals 26y and 27y). Image blur correction is performed by moving the four lens group 14a in the XY plane orthogonal to the optical axis O of the imaging optical system. That is, in the image shake correction apparatus 20 of the present embodiment, the fourth lens group holding member 14 is a movable frame that holds a part of the optical lenses of the imaging optical system. The image blur correction drive unit 25 functions as a drive unit that drives the movable frame (fourth lens group holding member 14) relative to the fixed frame (main body member 22) (details will be described later).

  As the imaging optical system of the camera unit 10, a high magnification zoom optical system (zoom lens) having an optical magnification of, for example, about 20 to 30 times is applied. The imaging optical system is not limited to this. For example, a fixed focus type optical system (for example, a fisheye lens) may be applied, or a variable focus type (varifocal lens) optical system may be used. Of course, even a zoom optical system with a higher magnification such as an optical magnification of 50 may be used.

  The outline of the configuration of the camera unit 10 is as described above. Various components other than those described above in the camera unit 10, such as a drive mechanism (not shown) that contributes to an AF operation and a zoom operation, various electrical components including the diaphragm mechanism 18 and the flexible printed board 16, etc. Since the constituent members are portions not directly related to the present invention, the same components as those which have been put into practical use in the past are applied, and the detailed description thereof is omitted.

  Next, the configuration of the image shake correction apparatus 20 of the present embodiment will be described below mainly using FIGS.

  FIG. 4 is an external perspective view showing the main components of the camera unit shown in FIGS. 2 and 3 and showing the image blur correction apparatus of the present embodiment. FIG. 5 is an exploded perspective view showing the image blur correction apparatus of FIG. 4 in an exploded manner. FIG. 6 is a block diagram showing the main components of the image blur correction control unit in the image blur correction apparatus of this embodiment.

  The image blur correction apparatus 20 according to the present embodiment is a so-called lens that performs image blur correction by moving a part of optical lenses constituting the imaging optical system in an XY plane orthogonal to the optical axis O of the imaging optical system. A shift type optical image shake correction mechanism is provided. Note that the basic configuration of the image shake correction apparatus 20 of the present embodiment is substantially the same as that of the conventional image shake correction apparatus of the same form.

  The image shake correction apparatus 20 of the present embodiment includes a main body member 22, a lid member 21, an image shake correction drive unit 25, a part of optical lenses (fourth lens group 14a) constituting an imaging optical system, The fourth lens group holding member 14 is a movable frame that holds the lens.

  The main body member 22 is a basic constituent member and a fixed frame in the image blur correction device 20. On the basis of the main body member 22, various constituent members are fixedly arranged at predetermined portions. An opening 22a for allowing a subject light beam that passes through the imaging optical system to pass therethrough is formed at a substantially central portion of the main body member 22.

  The lid member 21 is disposed so as to cover one surface of the main body member 22 and is provided to protect, fix, and support various components disposed between the main body member 22 and the lid member 21. . The lid member 21 is fixed to the main body member 22 using, for example, a plurality of (four in this embodiment) screws 23. For this purpose, the lid member 21 has a plurality (four places) of screw insertion holes 21d. Correspondingly, a plurality (four places) of screw holes 22d are formed in the main body member 22 (see FIG. 5). The lid member 21 has an opening 21a for allowing a subject light beam that passes through the imaging optical system to pass through at a substantially central portion thereof.

  Thus, when the main body member 22 and the lid member 21 are fixed and assembled by the screws 23 or the like, the fourth lens group is between the two (the main body member 22 and the lid member 21). A fourth lens group holding member 14, which is a movable frame for holding 14a, is disposed so as to be movable in an XY plane orthogonal to the optical axis O.

  A substantially circular opening is formed in a substantially central portion of the fourth lens group holding member 14, and a substantially circular fourth lens group 14a is fixedly disposed in this opening. The fourth lens group 14 a is disposed at a position facing each of the opening 22 a of the main body member 22 and the opening 21 a of the lid member 21.

  In other words, the fourth lens group 14a, the main body member 22, and the lid member 21 are all made up of the optical axis O of the fourth lens group 14a, the substantially central axis of the opening 22a, and the substantially central axis of the opening 21a. It arrange | positions so that it may correspond substantially.

  As described above, the fourth lens group holding member 14 that holds the fourth lens group 14a with respect to the main body member 22 can move in an XY plane orthogonal to the optical axis O of the imaging optical system. It is the movable frame comprised by. For this purpose, first, the main body member 22 and the fourth lens group holding member 14 are connected via a plurality of (three in the present embodiment) biasing springs 34. The plurality of biasing springs 34 are stretched between the main body member 22 and the fourth lens group holding member 14 so as to be able to expand and contract in a direction parallel to the optical axis O. (It is stretched).

  That is, a plurality of (three places) spring hooking portions 14c (see FIG. 5) formed in a predetermined portion of the fourth lens group holding member 14 and the same number (three places) provided on the main body member 22 corresponding thereto. ) Of the urging spring 34 is suspended between the spring hooking portion (not shown). Thus, the fourth lens group holding member 14 that is a movable frame is biased in a direction along the optical axis O with respect to the main body member 22 that is a fixed frame. In this state, the fourth lens group holding member 14 has a degree of freedom that allows movement within an XY plane orthogonal to the optical axis O.

  As described above, the fourth lens group holding member 14 (movable frame) is connected to the main body member 22 (fixed frame) while being biased in a direction parallel to the optical axis O by the plurality of biasing springs 34. In this state, a plurality (at least three) of ceramic balls 31 are interposed between the two (between the main body member 22 and the fourth lens group holding member 14). The ceramic balls 31 are provided to facilitate the movement of the fourth lens group holding member 14 with respect to the main body member 22 in the XY plane orthogonal to the optical axis O. Here, the ceramic ball 31 functions as a support member that movably supports the fourth lens group holding member 14 with respect to the main body member 22. In this embodiment, the ceramic ball 31 is used to avoid the influence of the magnet. However, when there is no influence of the magnet, a steel ball (steel ball) may be used instead. .

  Each ceramic ball 31 is arranged as follows. That is, a plurality of (three in the present embodiment) ball arrangement portions 22b are formed in each predetermined region in the outer peripheral edge region of the opening 22a of the main body member 22. The ball arrangement portion 22b accommodates the ceramic ball 31 so as to roll within a predetermined range to form a storage space, and also supports a support member arrangement portion that limits the amount of movement of the ceramic ball 31 in the plane. It is. In the ball placement portion 22b, a portion serving as a bottom portion thereof, that is, a plane (XY plane orthogonal to the optical axis O) of the main body member 22, and a surface receiving the ceramic ball 31, for example, stainless steel or the like A ball receiving plate 32 formed in a substantially rectangular shape using a metal flat plate member or the like is disposed. The main body member 22 is formed with a wall surface extending from the peripheral edge portion in a direction along the optical axis O so as to surround the ball receiving plate 32 (see FIG. 5 and the like). Thereby, the said ball | bowl arrangement | positioning part 22b forms the box shape which makes the opposing surface of the said bottom face part an opening by the said bottom face part and the said wall surface.

  On the other hand, as described above, when the fourth lens group holding member 14 is disposed so as to overlap the main body member 22 at a regular predetermined position, the fourth lens group holding member 14 includes A ball receiving portion in each of the regions that are the outer peripheral edge region of the opening in which the fourth lens group 14a is disposed and that face each of the plurality (three in the present embodiment) of the ball disposing portions 22b. A plurality of 14b are formed (three in this embodiment). Each ball receiving portion 14b accommodates a ball receiving plate 33 formed in a substantially rectangular shape using a metal flat plate member or the like made of the same material as the ball receiving plate 32. When each of the ball receiving plates 33 is in this state (that is, the main body member 22 and the fourth lens group holding member 14 are disposed in a regular predetermined position), It arrange | positions so that each opening of the installation part 22b may be plugged, respectively. Accordingly, at this time, the ceramic balls 31 are housed one by one in the plurality of ball arrangement portions 22b. With this configuration, the ceramic ball 31 rolls while being sandwiched between the ball receiving plates 32 and 33 inside the ball placement portion 22b. Thereby, the movement of the fourth lens group holding member 14 (movable frame) with respect to the main body member 22 (fixed frame) in the XY plane orthogonal to the optical axis O is smoothed.

  In the present embodiment, an example is shown in which the ball arrangement portion 22b and the ball receiving portion 14b are provided at three locations. In this case, the ball arrangement portion 22b and the ball receiving portion 14b are arranged at substantially equal intervals in the circumferential direction around the central axis of the opening 22a (that is, a virtual axis that coincides with the optical axis O). desirable. In the present embodiment, an example is shown in which the ball disposing portion 22b and the ball receiving portion 14b are provided in each part having an angle of about 120 degrees with the optical axis O as the center.

  Further, the main body member 22 is configured such that a pair of coils (26x, 26y) which are members constituting a part of the image blur correction drive unit 25, for example, are fixedly arranged in the outer peripheral area of the opening 22a. .

  Here, of the pair of coils (26x, 26y), one coil (hereinafter referred to as X coil) 26x is used to move the fourth lens group holding member 14 (movable frame) in the direction along the X axis. It is a member that contributes and is arranged along the X-axis. The other coil (hereinafter referred to as Y coil) 26y of the pair of coils (26x, 26y) contributes to the movement of the fourth lens group holding member 14 (movable frame) in the direction along the Y axis. And is arranged along the Y-axis.

  Correspondingly, the fourth lens group holding member 14 has a pair of magnets 27x and 27y (see FIG. 5), which are a pair of magnets in each part facing the pair of coils (26x and 26y). Is fixed. That is, a pair of magnets 27x and 27y are arranged for each of the coils 26x and 26y. Each of the magnets 27x and 27y is formed in pairs. Each of the magnets 27x and 27y is arranged such that the direction of the magnetic pole is a predetermined direction.

  Here, one magnet (hereinafter referred to as X magnet) 27x of the pair of magnets 27x and 27y cooperates with the X coil 26x, and the fourth lens group holding member 14 (movable frame). This is a member that contributes to movement in the direction along the X axis. The two magnets constituting the X magnet 27x are arranged side by side so that the magnetic poles are reversed in the direction along the X axis. The other of the pair of magnets 27x and 27y (hereinafter referred to as a Y magnet) 27y cooperates with the Y coil 26y to form the fourth lens group holding member 14 (movable frame). It is a member that contributes to movement in the direction along the Y axis. The two magnets constituting the magnet 27y are arranged side by side so that the magnetic poles are reversed in the direction along the Y axis.

  Further, in the fourth lens group holding member 14, magnetic sensors 28 x and 28 y (see FIG. 5) made up of Hall elements or the like are disposed in the vicinity of the magnet 27. One of the magnetic sensors 28x is an X magnetic sensor that detects a magnetic pole change in a direction along the X axis. The other magnetic sensor 28y is a Y magnetic sensor that detects a magnetic pole change in the direction along the Y axis.

  The magnets 27x and 27y and the magnetic sensors 28x and 28y are members that constitute another part of the image blur correction drive unit 25. The magnets (27x, 27y) and the magnetic sensors (28x, 28y) constitute a position detection unit that detects the position of the fourth lens group holding member 14 in the movable plane (in the XY plane). The position detection unit includes a hall amplifier 56 and a position detection circuit 57 of an image blur correction control unit (50x, 50y) described later (see FIG. 6).

  As described above, the image blur correction drive unit 25 includes the coil (26x, 26y), the magnet (27x, 27y), the magnetic sensor (28x, 28y), and the like.

  The image blur correction apparatus 20 according to the present embodiment includes various components other than those described above. Since these components are not directly related to the present invention, illustration and description thereof are omitted.

  As shown in FIG. 3, the image shake correction apparatus 20 configured as described above is fixedly disposed at a predetermined position as a part of the camera unit 10. In this case, the image blur correction device 20 is fixed to a predetermined fixed portion in the camera unit 10 by using, for example, a plurality of screws 24 (three in this embodiment; see FIGS. 4 and 5). .

  Next, a schematic configuration of the image blur correction control unit (50x, 50y) that is a main part of the electrical configuration unit in the image blur correction device 20 of the present embodiment will be described below with reference to FIG. In FIG. 6, the image blur correction device 20 is expressed as an IS unit (IS stands for Image Stabilization).

  The image blur correction control unit, which is a main part of the electrical components in the image blur correction apparatus 20 of the present embodiment and performs drive control of the image blur correction drive unit 25, includes an X image blur correction control unit 50x, The image blur correction control unit 50y for Y is configured.

  The X image blur correction control unit 50x controls the drive current to the X coil 26x while referring to the output from the X magnetic sensor 28x, whereby the fourth lens group holding member 14 (movable frame) is controlled. Controls movement in the direction along the X axis. The Y image shake correction control unit 50y controls the drive current to the Y coil 26y while referring to the output from the Y magnetic sensor 28y, whereby the fourth lens group holding member 14 (movable frame) is controlled. Controls movement in the direction along the Y-axis. The X image blur correction control unit 50x and the Y image blur correction control unit 50y are configured in exactly the same manner. For example, the image blur correction control unit (50x, 50y) controls the drive current by pulse width modulation (PWM) that modulates by changing the duty ratio of the pulse wave.

  The X image blur correction control unit 50x and the Y image blur correction control unit 50y include a gyro sensor 51, a camera shake correction controller 52, a deviation calculator 53, a servo controller 54, and a drive amplifier 55, respectively. And a hall amplifier 56, a position detection circuit 57, a self-diagnosis instruction value controller 58, a self-diagnosis determination controller 59, and the like.

  The gyro sensor 51 is a detection sensor that detects shake vibration (device shake) of the imaging device 1 (camera unit 10) on which the image shake correction device 20 is mounted by detecting angular velocity and angular acceleration. The shake vibration detection result by the gyro sensor 51 is output to the camera shake correction controller 52.

  Based on the output signal from the gyro sensor 51, the camera shake correction controller 52 drives the shake correction value for canceling the shake vibration, that is, the image shake correction device (IS unit in FIG. 6) 20 for shake correction. It is a circuit part which calculates the driving amount at the time. The driving amount calculation result by the camera shake correction controller 52 is output to the deviation calculator 53.

  At the same time, the deviation calculator 53 receives an output signal from the position detection circuit 57. That is, when output signals from the magnetic sensors 28x and 28y of the image blur correction device 20 are input to the hall amplifier 56 of the image blur correction control units 50x and 50y, the hall amplifier 56 receives the signal and receives the signal. Amplification processing is performed. The signal amplified by the hall amplifier 56 is output to the position detection circuit 57. In response to this, the position detection circuit 57 detects the position of the fourth lens group holding member 14 (fourth lens group 14a) with respect to the main body member 22 in the XY plane orthogonal to the optical axis O. The detection result is output to the deviation calculator 53. Thus, the hall amplifier 56 and the position detection circuit 57 constitute a part of the position detection unit.

  The deviation calculator 53 performs a deviation calculation based on an output signal from the camera shake correction controller 52 and an output signal (details will be described later) from the position detection circuit 27 to generate a drive signal to the image blur correction device 20. It is a circuit part to do. The calculation result by the deviation calculator 53 is output to the servo controller 54.

  The servo controller 54 receives the output signal from the deviation calculator 53 and drives the drive control signal of the image blur correction device 20, that is, the fourth lens group holding member 14 (fourth lens group 14 a) to a target position (to cancel the shake vibration). This is an arithmetic circuit unit that generates a drive control signal for moving to the position (shake correction position). The servo controller 54 is configured by, for example, a microcomputer. The drive control signal generated by the servo controller 54 is output to the drive amplifier 55.

  The drive amplifier 55 is an amplifier circuit that receives a drive control signal from the servo controller 54 and amplifies it. The drive amplifier 55 is configured by, for example, a PWM drive circuit. The signal amplified by the drive amplifier 55 is sent to the image blur correction drive unit 25 (see FIG. 5 and the like) to drive predetermined drive control, for example, the coils 26x and 26y with a predetermined drive current.

  Thus, the image blur correction device 20 is driven (a predetermined drive current is passed through the coils 26x and 26y), and the fourth lens group holding member 14 (fourth lens group 14a) moves in the movable plane. The position of the fourth lens group holding member 14 (fourth lens group 14a) at this time is detected by the magnetic sensors 28x and 28y, and the position information is input to the deviation calculator 53 again via the position detection circuit 57. Is done. Then, the deviation calculator 53 performs the predetermined calculation, and the calculation result is output to the servo controller 54. Then, the servo controller 54 again generates a drive control signal for the image blur correction device 20, and drives and controls the image blur correction drive unit 25 of the image blur correction device 20 in accordance with the drive control signal.

  As described above, the image blur correction apparatus 20 compares the drive amount calculation result by the camera shake correction controller 52 with the position detection result of the current position detected by the position detection circuit 57, and performs feedback control for performing image blur correction. Has been done. The above-described configuration and control of the image shake correction apparatus 20 in the present embodiment are substantially the same as the configuration and control in the conventional general image shake correction apparatus.

  On the other hand, in the image shake correction apparatus 20 of the present embodiment, whether or not the image shake correction apparatus 20 itself is operating normally by executing a series of preset prescribed operations at a preset timing. The state of the device, such as whether or not a failure or abnormality has occurred, whether or not it has failed, and, if it is operating normally, how much its degradation state is It has a self-diagnosis mode for confirming and determining.

  Specifically, the timing of executing the operation in the self-diagnosis mode is, for example, every predetermined time every day or every predetermined time interval (for example, every 24 hours or every specified time interval such as every week), etc. It is. The execution timing at which the image blur correction device 20 is operated in the self-diagnosis mode is controlled by programming in the control unit of the terminal device that controls the imaging device 1 on which the image blur correction device 20 is mounted.

  Further, as a series of predetermined operations set in advance in the self-diagnosis mode, for example, the image blur correction device 20 is driven to move the fourth lens group holding member 14 (fourth lens group 14a) to the designated target position. A series of operations such as determining whether or not the target position can be maintained and how much the deviation in maintaining the target position is, and determining the state of the image blur correction device 20 It is.

  For this purpose, the image blur correction apparatus 20 of the present embodiment includes a self-diagnosis instruction value controller 58 and a self-diagnosis determination controller 59 as shown in FIG. 6 and as described above.

  The self-diagnosis instruction value controller 58 is a circuit unit that outputs a self-diagnosis instruction value to the deviation calculator 53 when the image blur correction apparatus 20 operates in the self-diagnosis mode. Here, the instruction value for self-diagnosis is a movement target value representing a target position when moving the movable frame.

  When the image blur correction device 20 operates in the self-diagnosis mode, the self-diagnosis determination controller 59 outputs an output from the deviation calculator 53, that is, a calculation result (deviation) by the deviation calculator 53, and the self-diagnosis instruction. The circuit unit functions as a determination unit that receives the instruction value data from the value controller 58 and determines the operation state of the image blur correction device 20.

  Specifically, when the imaging apparatus 1 (camera unit 10) starts operation in the self-diagnosis mode, first, an instruction for instructing driving from a self-diagnosis instruction value controller 58 to a predetermined position (for example, the center position). The value is output. This instruction signal is output to the servo controller 54 via the deviation calculator 53. The servo controller 54 generates a drive control signal corresponding to the instruction signal, and drives and controls the image blur correction drive unit 25 according to the generated signal.

  The position detection circuit 57 detects the position of the fourth lens group holding member 14 (fourth lens group 14a) based on the detection signals of the magnetic sensors 28x and 28y, and outputs the detected position information to the deviation calculator 53. To do. Thus, the position detection circuit 57 constitutes a part of the position detection unit.

  The deviation calculator 53 performs a deviation calculation based on the indicated value and the detected position information, and outputs the calculation result to the self-diagnosis determination controller 59. Upon receiving this, the self-diagnosis determination controller 59 receives the output from the deviation calculator 53 and the instruction value data from the self-diagnosis instruction value controller 58 to diagnose and determine its own state. The determination result is output from the image blur correction control unit (50x, 50y) to the control unit (not shown) of the camera unit 10.

  Here, the self-diagnosis instruction value data is, for example, XY coordinates for designating an arbitrary point on the XY plane. Specifically, the instruction value for self-diagnosis takes data as shown in FIG. FIG. 7 is a diagram illustrating a specific example of self-diagnosis instruction value data (movement target value) in the image shake correction apparatus of the present embodiment.

  In FIG. 7, a region surrounded by a solid line denoted by reference numeral 100 indicates that the fourth lens group holding member 14 (fourth lens group 14 a) of the image shake correction apparatus 20 is mechanical in the XY plane orthogonal to the optical axis O. Indicates the movable range. An area surrounded by an alternate long and two short dashes line denoted by reference numeral 101 indicates a correction driving range when the image blur correction is performed. Here, the correction drive range 101 is inside the movement drive range 100. This is because, for example, the correction drive range 101 is ensured by taking into account mechanical variations or the like due to the work accuracy of the movable frame or the like in the image blur correction device 20.

  The symbol A indicates, for example, the center point of the fourth lens group 14a, that is, the point that coincides with the optical axis O. The image blur correction device 20 is driven so that the center point (optical axis O) of the fourth lens group 14a and the reference symbol A substantially coincide with each other while the imaging device 1 (camera unit 10) to which the image blur correction device 20 is applied is activated. Be controlled. For this reason, the position indicated by the symbol A is referred to as a reference designated position.

  Reference numerals B <b> 1 to B <b> 4 are examples of target points on the X axis or Y axis, respectively, within the movement drive range 100. In this case, for example, in order to move the optical axis O from the reference A position to the reference B1 position or the reference B3 position, the X image blur correction control unit 50x is controlled. Since the Y axis does not move, the Y image shake correction control unit 50y performs control to maintain the position. Similarly, for example, to move the optical axis O from the position A to the position B2 or the position B4, the Y image shake correction control unit 50y is controlled, and the X image shake correction control unit 50x sets the position. Control to hold.

  Reference numerals C <b> 1 to C <b> 4 are examples in which target points are set at substantially four corner positions in the movement drive range 100. In this case, for example, in order to move the optical axis O from the position A to any one of the positions C1 to C4, both the X image blur correction controller 50x and the Y image blur correction controller 50y are operated. Need to control.

  The movement target point in the self-diagnosis mode becomes more severe as the position away from the center point is set and both the X axis and the Y axis are driven. This is because the performance of the drive mechanism is generally best at the center, and the performance deteriorates as the distance from the center increases. Therefore, the strictness of the diagnostic criteria can be set by selecting the movement target point when operating in the self-diagnosis mode.

  Other configurations are substantially the same as those of the conventional image shake correction apparatus. Therefore, since the configuration not described above is a portion not directly related to the present invention, illustration and detailed description thereof are omitted.

  Next, the operation of the image blur correction apparatus according to the present embodiment when operated in the self-diagnosis mode will be described below with reference to FIGS.

  8, 9, and 11 are flowcharts showing a processing sequence in the self-diagnosis mode in the image blur correction apparatus of the present embodiment. Among these, FIG. 8 is a main flowchart of a processing sequence in the self-diagnosis mode. FIG. 9 is a flowchart showing a detailed processing sequence of the stop accuracy diagnosis process (step S1) and the drive current diagnosis process (step S2) of FIG. FIG. 11 is a flowchart showing a detailed processing sequence of the sinusoidal tracking accuracy diagnosis process (step S3) of FIG.

  10, 12, and 13 are explanatory diagrams for explaining the processing sequences shown in the flowcharts of FIGS. 9 and 11. Among these, FIG. 10 is an explanatory diagram of the stop accuracy diagnosis process of FIG. 9 (the process of step S1 of FIG. 8). FIG. 12 is an explanatory diagram of the sine wave follow-up accuracy diagnosis process of FIG. 11 (the process of step S3 of FIG. 8). FIG. 13 is a diagram illustrating a waveform of a deviation between the drive wave and the body vibration wave illustrated in FIG.

  When the image blur correction apparatus 20 according to the present embodiment operates in the self-diagnosis mode, as shown in FIG. 8, the stop accuracy diagnosis process in step S1, the drive current diagnosis process in step S2, and the sine wave in step S3. The tracking accuracy diagnosis process is sequentially executed.

  In the stop accuracy diagnosis process in step 1 of FIG. 8, as shown in FIG. 9, first, in step S11, the image blur correction control unit (50x, 50y) uses the center point of the fourth lens group 14a as a reference designated position ( The process of moving to symbol A) in FIG. 7 is performed. At the same time, a variable N = 0 representing the designated position is set. Thereafter, the process proceeds to step S12.

  That is, the image blur correction control unit (50x, 50y) indicates the reference designated position ((x coordinate, y coordinate) corresponding to the variable N = 0 representing the designated position from the self-diagnosis instruction value controller 58 as (x0, An instruction value indicating y0) (symbol A in FIG. 7) is output. This instruction value signal is input to the servo controller 54 via the deviation calculator 53. In response to this, the servo controller 54 generates a drive control signal corresponding to the input instruction value signal, and drives and controls the image blur correction drive unit 25 of the image blur correction apparatus 20 according to the generated signal. Thereafter, the system waits for a predetermined time (first specified time T1) until the fourth lens group 14a is stabilized. At this time, the position detection circuit 57 detects the position of the fourth lens group 14 a based on the detection signals of the magnetic sensors 28 x and 28 y and inputs the detected position information to the deviation calculator 53. The deviation calculator 53 calculates a deviation based on the indicated value and the detected position information, and outputs the calculation result to the servo controller 54. In response to this, the servo controller 54 newly generates a drive control signal corresponding to the input instruction value signal, and drives and controls the image blur correction drive unit 25 (repeatedly thereafter).

  The situation at this time is the standby time (first specified time) indicated by reference numeral T1 in FIG. The diagram shown in FIG. 10 is a diagram showing fluctuations in the current position of the fourth lens group 14a detected by the magnetic sensors 28x and 28y and the position detection circuit 57. In the initial drive period shown in FIG. 10, that is, during the waiting time T1, the current position of the fourth lens group 14a being driven changes toward the target position (in this case, the reference designated position A). Is in an unstable state. When the waiting time T1 has elapsed, the fourth lens group 14a is in a stable state. Therefore, the process proceeds to the next step S12 in FIG.

  In step S12, the image blur correction control unit (50x, 50y) executes a stop accuracy measurement process. This process is executed during the measurement time (second specified time) indicated by the symbol T2 shown in FIG. During the measurement time T2, the fluctuation between the target position (in this case, the reference designated position A) and the current position is stable as shown in FIG. 10, and the two seem to match at first glance. . However, as can be seen in the enlarged view indicated by the symbol S in FIG. Therefore, the stop accuracy measurement process executed in step S12 is a process for measuring the maximum value (deviation MAX) and the minimum value (deviation MIN) of the minute fluctuations. This process is obtained by the deviation calculator 53 performing a deviation calculation based on the detected position information signal (current position information) from the position detection circuit 57 and the indicated value signal. Here, the obtained “deviation MAX” and “deviation MIN” are output to the self-diagnosis determination controller 59.

  Next, in step S13 of FIG. 9, the image blur correction control unit (50x, 50y) determines a predetermined standard value ± P0 for “deviation MAX” and “deviation MIN” obtained in the processing of step S12 described above. Compare with. Here, the standard value ± P0 is a standard value serving as a diagnostic criterion for determining whether or not the image blur correction apparatus 20 is operating normally. That is, it can be said that the standard value P0 represents an allowable range of normal operation in the image shake correction apparatus 20 (hereinafter, the same applies to the standard value). It is assumed that the standard value data is stored in advance in the self-diagnosis determination controller 59, for example. In addition to this, for example, it is stored in advance in a storage medium provided in another part inside the image blur correction device 20, and is read as appropriate when performing the process of step S13. Also good. In the present embodiment, specifically, for example, the standard value ± P0 = ± 8 μm.

  In the processing of step S13, the image blur correction control unit (50x, 50y) determines that “deviation MAX> standard value P0” or “deviation MIN <standard value− (minus) P0”. If it is confirmed by 59, the determination result is output to a control unit (not shown) of the camera unit 10. Thereafter, the process proceeds to step S25. Note that (deviation MAX) − (deviation MIN) may be calculated from the deviation MAX and the deviation MIN, and compared with the standard P0 ′ corresponding thereto.

  In step S25, the control unit (not shown) of the camera unit 10 sends the determination result from the image blur correction device 20 to the wired cable, wireless communication means (not shown), network or the like (not shown). The data is transmitted to a terminal device (not shown) connected through the network. In response to this, the terminal device (not shown) executes a process of displaying “first caution display” on the display screen of the image display device (not shown). Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  Here, as a specific example of the “first caution display” displayed, for example, the image shake correction apparatus 20 of the image pickup apparatus 1 (camera unit 10 thereof) has some abnormality and needs repair or maintenance. Or a warning display for notifying that a malfunction or failure has occurred, or notifying that the time for repair or replacement is approaching.

  On the other hand, in the process of step S13, the image blur correction control unit (50x, 50y) does not satisfy “deviation MAX> standard value P0” or “deviation MIN <standard value− (minus) P0”. If it is confirmed by the determination controller 59, the process proceeds to the next step S14.

  In step S14, the image blur correction control unit (50x, 50y) determines a predetermined standard value different from the standard value ± P0 for “deviation MAX” and “deviation MIN” obtained in the process of step S12. Compare with Q0. Here, the standard value ± Q0 is a standard value serving as a diagnostic standard when the image blur correction apparatus 20 is operating normally but the tolerance is relaxed. Therefore, a value that satisfies the standard value P0> standard value ± Q0 is set. In the present embodiment, specifically, for example, the standard value ± Q0 = ± 5 μm.

  The data of the standard value ± Q0 is also stored in advance in, for example, the self-diagnosis determination controller 59 or another storage medium in the image blur correction apparatus 20, and the process of step S14 is performed. Read out as appropriate.

  In the process of step S14, the image blur correction control unit (50x, 50y) determines that “deviation MAX> standard value Q0” or “deviation MIN <standard value− (minus) Q0”. If it is confirmed by 59, the determination result is output to a control unit (not shown) of the camera unit 10. Thereafter, the process proceeds to step S26.

  In step S26, the control unit (not shown) of the camera unit 10 sends the determination result from the image blur correction device 20 to the wired cable or wireless communication means (not shown), network or the like (not shown). The data is transmitted to a terminal device (not shown) connected through the network. Upon receiving this, the terminal device (not shown) executes a process of displaying “second caution display” on the display screen of the image display device (not shown). Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  Here, as a specific example of the “second caution display” displayed, for example, the image shake correction apparatus 20 of the imaging apparatus 1 (camera unit 10) has no abnormality at present, but repair in the near future. Or, a caution notice that maintenance is necessary, or a warning notice that suggests that an abnormality or failure may occur in the near future.

  On the other hand, in the processing of step S14, the image blur correction control unit (50x, 50y) is for self-diagnosis that “deviation MAX> standard value Q0” or “deviation MIN <standard value− (minus) Q0” is not satisfied. If it is confirmed by the determination controller 59, the process proceeds to the next step S15.

  In step S15, the image blur correction control unit (50x, 50y) sets a variable N = 1 representing the designated position. In this case, if the reference designated position A is moved to the code B (N), the target position B (N) = B1. Similarly, if the reference designated position A is moved to the code C (N), the target position C (N) = C1.

  Subsequently, in step S16, the image blur correction control unit (50x, 50y) designates the center point of the fourth lens group 14a as a designated position corresponding to the variable N = 1 representing the designated position (for example, the target position is represented by the code in FIG. 7). In the case of B1, coordinates (x1, y0), and in the case where the target position is C1 in Fig. 7, a process of moving to the coordinates (x1, y1) is performed. After that, the process proceeds to step S17.

  Subsequently, in step S17, the image blur correction control unit (50x, 50y) executes a stop accuracy measurement process. This process is substantially the same as the process in step S12 described above. Thereafter, the process proceeds to step S18.

  In step S18, the image blur correction control unit (50x, 50y) compares the “deviation MAX” and “deviation MIN” obtained in the process of step S17 described above with a predetermined standard value ± P1. Here, the standard value ± P1 is a standard value that serves as a diagnostic criterion for determining whether or not the image blur correction apparatus 20 is operating normally, similarly to the standard value ± P0. The data of the standard value ± P1 is also stored in advance in, for example, the self-diagnosis determination controller 59 or another storage medium in the image blur correction device 20, and when performing the process of step S18. Read as appropriate.

  In general, the driving accuracy tends to decrease as the amount of movement increases, that is, as the moving amount moves to a peripheral region away from the central region. Therefore, the reference value for the stop accuracy may be set slightly lower for the drive accuracy of movement to the peripheral region than for the drive accuracy in the central region. In the present embodiment, for example, when the standard value ± P0 = ± 8 μm of the stop accuracy at the reference designated position A is set, when moving from the reference designated position A toward the peripheral region (target values B1, C1, etc.) The stop accuracy standard value ± P1 = ± 10 μm or the like may be set. This process is substantially the same as the process in step S13 described above.

  That is, in the process of step S18, the image blur correction control unit (50x, 50y) determines that “deviation MAX> standard value P1” or “deviation MIN <standard value− (minus) P1”. When confirmed by the controller 59, the determination result is output to a control unit (not shown) of the camera unit 10. Thereafter, the process proceeds to step S25.

  In step S25, the control unit (not shown) of the camera unit 10 transmits the determination result from the image blur correction device 20 to the terminal device (not shown). Upon receiving this, the terminal device (not shown) displays “first caution display” on the display screen of the image display device (not shown). Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  On the other hand, in the process of step S18, the image blur correction control unit (50x, 50y) does not satisfy “deviation MAX> standard value P1” or “deviation MIN <standard value− (minus) P1”. If it is confirmed by the determination controller 59, the process proceeds to the next step S19.

  In step S19, the image blur correction control unit (50x, 50y) determines a predetermined standard value different from the standard value ± P1 for “deviation MAX” and “deviation MIN” obtained in the process of step S17 described above. Compare with ± Q1. Here, the standard value ± Q1 is a standard value that serves as a diagnostic reference when the image blur correction apparatus 20 is operating normally but the tolerance is relaxed, as in the case of the standard value ± Q0 (standard value P1> standard value Q1). Since the standard value ± Q1 is a reference value for the stop accuracy of the peripheral portion, it is set slightly lower than the standard value ± Q0, which is a reference value for the stop accuracy of the central region. In this embodiment, for example, when the standard value ± Q0 = ± 5 μm, the standard value ± Q1 = ± 8 μm may be set. This process is substantially the same as the process in step S14 described above.

  The data of the standard value ± Q1 is also stored in advance in, for example, the self-diagnosis determination controller 59 or another storage medium in the image blur correction device 20, and the process of step S19 is performed. Read out as appropriate.

  In the process of step S19, the image blur correction control unit (50x, 50y) determines that “deviation MAX> standard value Q1” or “deviation MIN <standard value− (minus) Q1”. If it is confirmed by 59, the determination result is output to a control unit (not shown) of the camera unit 10. Thereafter, the process proceeds to step S26.

  In step S26, the control unit (not shown) of the camera unit 10 transmits the determination result from the image blur correction device 20 to the terminal device (not shown). Upon receiving this, the terminal device (not shown) executes a process of displaying “second caution display” on the display screen of the image display device (not shown). Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  On the other hand, in the process of step S19, the image blur correction control unit (50x, 50y) does not satisfy “deviation MAX> standard value Q1” or “deviation MIN <standard value− (minus) Q1”. If it is confirmed by the determination controller 59, the process proceeds to the next step S20.

  In step S20, the image blur correction control unit (50x, 50y) executes a drive current measurement process. In this drive current measurement process, for example, the output of the drive amplifier 55 is confirmed. Specifically, for example, the drive duty of the servo controller 54 is detected. Therefore, in this case, the image blur correction control unit (50x, 50y) functions as a drive current detection unit. Here, it can be seen that the amount of movement of the movable frame increases as the drive current increases. Thereafter, the process proceeds to step S21.

  In step S21, the image blur correction control unit (50x, 50y) compares the measurement result of the drive current by the drive current measurement process in step S20 described above with a predetermined standard value I11. Here, the standard value I11 is a standard value serving as a diagnostic criterion for determining whether or not the image shake correction apparatus 20 is operating normally. The data of the standard value I11 is also stored in advance in, for example, the self-diagnosis determination controller 59 or another storage medium in the image shake correction apparatus 20, and is appropriately selected when performing the process of step S20. Read it out.

  In the process of step S21, when it is confirmed that “drive current <standard value I11”, the image blur correction control unit (50x, 50y) determines the determination result as the control unit ( (Not shown). Thereafter, the process proceeds to step S25.

  In step S25, the control unit (not shown) of the camera unit 10 transmits the determination result from the image blur correction device 20 to the terminal device (not shown). Upon receiving this, the terminal device (not shown) displays “first caution display” on the display screen of the image display device (not shown). Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  On the other hand, in the process of step S21, when it is confirmed that the image blur correction control unit (50x, 50y) does not satisfy “drive current <standard value I11”, the determination result is sent to the control unit of the camera unit 10. (Not shown). Thereafter, the process proceeds to step S22.

  In step S22, the image blur correction control unit (50x, 50y) compares the measurement result of the drive current obtained in the process of step S20 with a predetermined standard value I21 different from the standard value I11. . Here, the standard value I21 is a standard value that serves as a diagnostic criterion when the image blur correction apparatus 20 is operating normally but the tolerance is relaxed (standard value I11> standard value I21).

  The data of the standard value I21 is also stored in advance in, for example, the self-diagnosis determination controller 59 or another storage medium in the image blur correction device 20, and when performing the processing of step S22. Read as appropriate.

  In the process of step S22, when it is confirmed that “drive current> standard value I21”, the image blur correction control unit (50x, 50y) determines the determination result as the control unit ( (Not shown). Thereafter, the process proceeds to step S26.

  In step S26, the control unit (not shown) of the camera unit 10 transmits the determination result from the image blur correction device 20 to the terminal device (not shown). Upon receiving this, the terminal device (not shown) executes a process of displaying “second caution display” on the display screen of the image display device (not shown). Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  On the other hand, in the process of step S22, when it is confirmed that “drive current> standard value I21” is not satisfied, the image blur correction control unit (50x, 50y) proceeds to the process of the next step S23. .

  In step S23, the image blur correction control unit (50x, 50y) increments the variable N at the designated position (N + 1), and proceeds to the next step S24.

  In step S24, the image blur correction controller (50x, 50y) checks whether or not the variable N = 5 at the designated position. Here, N = 5 is confirmed in the self-diagnosis mode in the four designated positions (reference numerals B1 to B4 or reference numerals C1 to C4 in FIG. 7) designated as the reference designated position (reference numeral A in FIG. 7). This is because the accuracy measurement is performed at (). Therefore, the number of measurement designated positions is not limited to this. In order to increase or decrease the designated position, a numerical value to be substituted into the variable N may be manipulated in the process of step S24.

  If N = 5 in the process of step S24, the series of processes is terminated and the process returns to the original process (return). If N = 5 is not confirmed, the process returns to step S16 and the subsequent processes are repeated.

  When the processing sequence in FIG. 9 ends and the processing returns to FIG. 8, the sine wave tracking accuracy diagnosis processing in the next step S3 in FIG. 8 is executed. The details of the sine wave tracking accuracy diagnosis process are as shown in FIG.

  First, in step S31 in FIG. 11, the image blur correction control unit (50x, 50y) performs a process of moving the center point of the fourth lens group 14a to the reference designated position (symbol A in FIG. 7). At the same time, a variable N = 0 representing the designated position is set. The process in step S31 is the same as the process in step S11 in FIG. Thereafter, the process proceeds to step S32.

  In step S32, the image blur correction control unit (50x, 50y) generates a sine wave by controlling the self-diagnosis instruction value controller 58, thereby starting a sine wave drive for driving the fourth lens group 14a. . At this time, the fourth lens group 14a is at the designated position (currently the designated reference position A) by the process of step S31 described above. Therefore, when the sine wave driving is started in step S32, the fourth lens group 14a vibrates around the designated position (currently the designated reference position A). Then, after the sine wave driving is started, it waits for a predetermined time T1 to elapse. Thereafter, the process proceeds to step S33.

  In order for the self-diagnosis instruction value controller 58 to generate a driving sine wave in the process of step S32, for example, the inside of itself (the self-diagnosis instruction value controller 58) or the image shake correction in advance. This is realized by referring to table data stored in another storage medium or the like inside the apparatus 20, or by the self-diagnosis instruction value controller 58 itself performing a trigonometric function calculation in an internal calculation circuit.

  Here, the diagram shown in FIG. 12 is a diagram showing a change in the current position of the fourth lens group 14 a detected by the magnetic sensors 28 x and 28 y and the position detection circuit 57. Reference numeral T1 shown in FIG. 12 is the predetermined time T1, which is the waiting time T1 after the start of driving and before the start of measurement. In this processing sequence, the accuracy measurement is waited during the initial drive period shown in FIG. 12, that is, during the standby time T1, and the sine wave tracking accuracy measurement process (the process of step S33 in FIG. 11) after the standby time T1 has elapsed. To start. As shown in FIG. 12, the actual vibration (displacement of the current position) due to the sine wave drive occurs slightly later than the supplied sine wave (drive wave).

  In step S33, the image blur correction control unit (50x, 50y) controls the deviation calculator 53 to execute a sine wave tracking accuracy measurement process. This measurement processing includes a detected position information signal from the position detection circuit 57 (current position information of the actual fourth lens group 14a) and a driving sine wave (instructions) output from the self-diagnosis instruction value controller 58. And a deviation calculation based on the value). The result is as shown in FIG. 13, for example. FIG. 13 is a diagram showing the deviation between the indicated value and the actual current location when sine wave driving is performed. Specifically, the sine wave tracking accuracy measurement process executed in the process of step S33 obtains the maximum value (deviation MAX) and the minimum value (deviation MIN) shown in the diagram of FIG. Here, the obtained “deviation MAX” and “deviation MIN” are output to the self-diagnosis determination controller 59. The accuracy measurement process is performed at a predetermined measurement time indicated by a symbol T2 in FIG. After the elapse of the predetermined measurement time (T2), the process proceeds to step S34.

  In step S34, the image blur correction control unit (50x, 50y) stops the sine wave drive.

  Subsequently, in step S35, the image blur correction control unit (50x, 50y) compares the “deviation MAX” and “deviation MIN” obtained in the processing of step S33 described above with a predetermined standard value R0. Do. Here, the standard value R0 is a standard value serving as a diagnostic criterion for determining whether or not the image shake correction apparatus 20 is operating normally. The standard value data is stored in advance in, for example, the self-diagnosis determination controller 59 or another storage medium in the image shake correction apparatus 20, and is appropriately read when performing the process of step S35. To.

  In the process of step S35, the image blur correction control unit (50x, 50y) determines that “deviation MAX> standard value R0” or “deviation MIN <standard value− (minus) R0” is satisfied. Is confirmed, the determination result is output to a control unit (not shown) of the camera unit 10. Thereafter, the process proceeds to step S46.

  In step S46, the control unit (not shown) of the camera unit 10 transmits the determination result from the image blur correction device 20 to the terminal device (not shown). Upon receiving this, the terminal device (not shown) executes a process of displaying “first caution display” on the display screen of the image display device (not shown) (similar to the process of step S25 in FIG. 9). . Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  On the other hand, in the processing of step S35, the image blur correction control unit (50x, 50y) is for self-diagnosis that “deviation MAX> standard value R0” or “deviation MIN <standard value− (minus) R0” is not satisfied. If it is confirmed by the determination controller 59, the process proceeds to the next step S36.

  In step S36, the image blur correction controller (50x, 50y) determines a predetermined standard value S0 that is different from the standard value R0 for the “deviation MAX” and “deviation MIN” obtained in the process of step S33. Compare with. Here, the standard value S0 is a standard value serving as a diagnostic reference when the image blur correction apparatus 20 is operating normally but the tolerance is relaxed. Therefore, a value that satisfies the standard value R0> the standard value S0 is set. The data of the standard value S0 is also stored in advance in, for example, the self-diagnosis determination controller 59 or another storage medium in the image blur correction device 20, and is appropriately selected when performing the processing of step S14. Read it out.

  In the process of step S36, the image blur correction controller (50x, 50y) determines that “deviation MAX> standard value S0” or “deviation MIN <standard value− (minus) S0”. If it is confirmed by 59, the determination result is output to a control unit (not shown) of the camera unit 10. Thereafter, the process proceeds to step S47.

  In step S47, the control unit (not shown) of the camera unit 10 transmits the determination result from the image blur correction device 20 to the terminal device (not shown). Upon receiving this, the terminal device (not shown) executes a process of displaying “second caution display” on the display screen of the image display device (not shown) (similar to the process of step S26 in FIG. 9). . Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  On the other hand, in the process of step S36, the image blur correction control unit (50x, 50y) does not satisfy “deviation MAX> standard value S0” or “deviation MIN <standard value− (minus) S0”. If it is confirmed by the determination controller 59, the process proceeds to the next step S37.

  In step S37, the image blur correction control unit (50x, 50y) sets a variable N = 1 representing the designated position.

  Subsequently, in step S38, the image blur correction control unit (50x, 50y) performs a process of moving the center point of the fourth lens group 14a to a designated position N (for example, reference numeral B1 in FIG. 7). This process is substantially the same as the process of steps S11 and S31 described above. Thereafter, the process proceeds to step S39.

  In step S39, the image blur correction control unit (50x, 50y) starts sine wave driving of the fourth lens group 14a and waits for a predetermined time T1 to elapse. Thereafter, the process proceeds to step S40. The process in step S39 is the same as the process in step S32 described above.

  In step S40, the image blur correction control unit (50x, 50y) controls the deviation calculator 53 to execute a sine wave tracking accuracy measurement process for a predetermined measurement time (see symbol T2 in FIG. 12). Then, after the predetermined measurement time (T2) has elapsed, the process proceeds to step S41. Note that the process of step S40 is the same as the process of step S33 described above.

  In step S41, the image blur correction control unit (50x, 50y) stops the sine wave drive (the same as the process in step S34 described above).

  Subsequently, in step S42, the image blur correction control unit (50x, 50y) compares the “deviation MAX” and “deviation MIN” obtained in the process of step S40 described above with the predetermined standard value R1. . Here, the standard value R1 is a standard value of a diagnostic standard corresponding to the designated position N when diagnosing whether or not the image shake correction apparatus 20 is operating normally. This standard value data is also stored in advance in, for example, the self-diagnosis determination controller 59 or another storage medium in the image blur correction apparatus 20, and is read out appropriately when performing the process of step S42. To.

  In the processing of step S42, the image blur correction control unit (50x, 50y) determines that “deviation MAX> standard value R1” or “deviation MIN <standard value− (minus) R1” is satisfied. Is confirmed, the determination result is output to a control unit (not shown) of the camera unit 10. Thereafter, the process proceeds to step S46.

  In step S46, the control unit (not shown) of the camera unit 10 transmits the determination result from the image blur correction device 20 to the terminal device (not shown). Upon receiving this, the terminal device (not shown) executes a process of displaying “first caution display” on the display screen of the image display device (not shown) (similar to the process of step S25 in FIG. 9). . Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  On the other hand, in the process of step S42, the image blur correction control unit (50x, 50y) does not satisfy “deviation MAX> standard value R1” or “deviation MIN <standard value− (minus) R1”. If it is confirmed by the determination controller 59, the process proceeds to the next step S43.

  In step S43, the image blur correction control unit (50x, 50y) determines a predetermined standard value S1 that is different from the standard value R1 for the “deviation MAX” and “deviation MIN” obtained in the process of step S40. Compare with. Here, the standard value S1 is a standard value serving as a diagnostic standard when the image blur correction apparatus 20 is operating normally but the tolerance is relaxed. Therefore, a value that satisfies the standard value R1> the standard value S1 is set. The data of the standard value S1 is also stored in advance in, for example, the self-diagnosis determination controller 59 or another storage medium in the image shake correction apparatus 20, and is appropriately selected when performing the process of step S43. Read it out.

  In the process of step S43, the image blur correction controller (50x, 50y) determines that “deviation MAX> standard value S1” or “deviation MIN <standard value− (minus) S1”. If it is confirmed by 59, the determination result is output to a control unit (not shown) of the camera unit 10. Thereafter, the process proceeds to step S47.

  In step S47, the control unit (not shown) of the camera unit 10 transmits the determination result from the image blur correction device 20 to the terminal device (not shown). Upon receiving this, the terminal device (not shown) executes a process of displaying “second caution display” on the display screen of the image display device (not shown) (similar to the process of step S26 in FIG. 9). . Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  On the other hand, in the process of step S43, the image blur correction control unit (50x, 50y) does not satisfy “deviation MAX> standard value S1” or “deviation MIN <standard value− (minus) S1”. If it is confirmed by the determination controller 59, the process proceeds to the next step S44.

  In step S44, the image blur correction control unit (50x, 50y) sets N + 1 for the variable N representing the designated position.

  Subsequently, in step S45, the image blur correction controller (50x, 50y) checks whether or not the designated position N = 5. Here, the confirmation of N = 5 is because the counter is used for performing the sine wave accuracy measurement process at five points (predetermined four locations in addition to the reference position).

  Here, when it is confirmed that N = 5, a series of diagnostic processing by sine wave accuracy measurement is terminated, and the processing returns to the original processing (return).

  If it is confirmed that N ≠ 5, the process returns to the above-described step S38, and the subsequent processes are repeated.

  As described above, according to the first embodiment, the fourth lens group holding member 14 (movable frame) has a predetermined operation, for example, a movement to a predetermined target position and an operation for holding the position, The position detection result obtained by performing the operation of moving to the target position and performing the sine wave drive at the position and detecting the position of the fourth lens group holding member 14 (movable frame) being executed is obtained in advance. A self-diagnosis mode for determining whether or not the image blur correction apparatus 20 is operating normally by determining whether or not it is within a specified allowable range is provided.

  Then, by executing the operation in the self-diagnosis mode periodically or at any time, it is possible to confirm whether or not the image blur correction apparatus 20 is operating normally.

  In addition, it is possible to accurately grasp in advance the possibility of the occurrence of a failure by determining the failure or failure of the device or the deterioration state of the device and notifying that the time for repair or replacement is approaching. Therefore, it is possible to contribute to the improvement of the reliability of the imaging apparatus to which the image blur correction apparatus is applied, and high reliability can be ensured in a camera system including the imaging apparatus.

  In addition, in the process sequence of FIG. 9, you may comprise with the form which abbreviate | omitted each process of step S14, the process of step S19, and step S22. Similarly, in the processing sequence of FIG. 11, the processing in step S36, the processing in step S43, and the processing in step S22 may be omitted.

  In this embodiment, when the image blur correction apparatus 20 operates in the self-diagnosis mode, the stop accuracy diagnosis process in step S1, the drive current diagnosis process in step S2, and the sine wave in step S3 shown in FIG. Although the tracking accuracy diagnosis process is described as being sequentially executed, the present invention is not limited to this example. For example, when the image blur correction apparatus operates in the self-diagnosis mode, a mode in which only the stop accuracy diagnostic processing and the drive current diagnostic processing are executed may be performed, or a mode in which only the sine wave tracking accuracy diagnostic processing is executed. It may be.

  For example, the second embodiment of the present invention described below is an example in the case where the control processing when operating the image blur correction apparatus in the self-diagnosis mode is different.

  14-17 is a figure which shows the summary of the 2nd Embodiment of this invention. Among these, FIG. 14 is a diagram showing self-diagnosis instruction value data (movement target value) in the image blur correction apparatus according to the second embodiment of the present invention. FIGS. 15, 16, and 17 are flowcharts showing a processing sequence in the self-diagnosis mode in the image blur correction apparatus of the present embodiment. Among these, FIG. 15 is a main flowchart showing a processing sequence in the self-diagnosis mode in the image blur correction apparatus of the present embodiment. FIG. 16 is a flowchart showing a detailed processing sequence of the stop accuracy diagnosis process (step S1) of FIG. FIG. 17 is a flowchart showing a detailed processing sequence of the sinusoidal tracking accuracy diagnostic processing (step S3) of FIG.

  The basic configuration of the image shake correction apparatus of the present embodiment and the imaging apparatus to which the image shake correction apparatus is applied is the same as that of the first embodiment described above. Therefore, although the detailed description about a structure is abbreviate | omitted, when showing each structural member in the following description, the same code | symbol shall be used.

  Further, in the present embodiment, as shown in FIG. 15, when operating in the self-diagnosis mode, the stop accuracy diagnosis process (step S1 in FIG. 15) and the sine wave tracking accuracy diagnosis process (step S3 in FIG. 15). The process is controlled to be executed. Furthermore, in the present embodiment, the self-diagnosis instruction value data (movement target value) applied to the stop accuracy diagnosis processing in the self-diagnosis mode has a form as shown in FIG. Here, also in the processing sequence in the present embodiment, basically only the processing in the above-described embodiment is different, and the same processing step code is used when substantially the same processing is indicated.

  That is, the self-diagnosis instruction value data in the present embodiment is, for example, XY coordinates for designating an arbitrary point on the XY plane, as in the first embodiment (FIG. 7). Specifically, the self-diagnosis instruction value in the present embodiment is data as shown in FIG.

  In FIG. 14, an area surrounded by a solid line denoted by reference numeral 100 indicates that the fourth lens group holding member 14 (fourth lens group 14 a) of the image shake correction apparatus 20 is mechanical in the XY plane orthogonal to the optical axis O. Indicates a movable range (similar to FIG. 7 of the first embodiment). In addition, each area surrounded by a two-dot chain line denoted by reference numerals 201 and 202 indicates a correction driving range when operating by image blur correction. Here, the region denoted by reference numeral 201 is referred to as a first correction drive range. Further, the region denoted by reference numeral 202 is referred to as a second correction drive range. Both the correction drive ranges 201 and 202 are set inside the movement drive range 100. Among these, the 1st correction drive range 201 is set to the inner area | region nearest to the movement drive range 100 similarly to the correction drive range 101 in the above-mentioned 1st Embodiment. The first correction drive range 201 is set to ensure the first correction drive range 201 in consideration of mechanical variation due to the work accuracy of the movable frame or the like in the image blur correction device 20. It has become.

  Further, the second correction movement range 202 is set to be a narrower range than the first correction movement range 201. For example, the length of one side of the frame line indicated by the second correction movement range 202 is set to be a half of the length of one side of the frame line of the first correction movement range 201 (details will be described later). .

  In FIG. 14, a symbol A indicates, for example, a center point of the fourth lens group 14a, that is, a point coincident with the optical axis O (similar to FIG. 7 of the first embodiment). The image blur correction device 20 is driven so that the center point (optical axis O) of the fourth lens group 14a and the reference symbol A substantially coincide with each other while the imaging device 1 (camera unit 10) to which the image blur correction device 20 is applied is activated. Be controlled. For this reason, the position indicated by the symbol A is referred to as a reference designated position. This is the same as the first embodiment described above.

  In FIG. 14, reference signs B <b> 1 to B <b> 4 are examples of target points on the frame line of the first correction movement range 201 within the movement drive range 100. That is, the target points B1 to B4 are intersections orthogonal to the frame line indicating the first correction movement range 201 and each of the X axis and the Y axis. In this case, for example, in order to move the optical axis O from the reference A position to the reference B1 position or the reference B3 position, the X image blur correction control unit 50x is controlled. Since the Y axis does not move, the Y image shake correction control unit 50y performs control to maintain the position. Similarly, for example, to move the optical axis O from the position A to the position B2 or the position B4, the Y image shake correction control unit 50y is controlled, and the X image shake correction control unit 50x sets the position. Control to hold.

  In FIG. 14, reference numerals C <b> 1 to C <b> 4 are target points at substantially four corner positions on the frame line of the first correction movement range 201 within the movement drive range 100. In this case, for example, in order to move the optical axis O from the position A to any one of the positions C1 to C4, both the X image blur correction controller 50x and the Y image blur correction controller 50y are operated. Need to control.

  Further, in FIG. 14, reference signs D <b> 1 to D <b> 4 are target points on the frame line indicating the second corrected movement range 202 within the movement drive range 100. That is, the target points D1 to D4 are intersections orthogonal to the frame line of the second correction movement range 202 and the X axis and the Y axis, respectively. The control in this case is substantially the same as B1 to B4.

  Here, as described above, the second correction movement range 202 is set to be a range narrower than the first correction movement range 201. Specifically, for example, when the distance between the reference designated position A and the target point B1 is set to distance = L as shown in FIG. 14, the distance between the reference designated position A and the target point D1 is set to L / 2. It is set. The same applies to other points.

  In FIG. 14, reference symbols E <b> 1 to E <b> 4 are target points at the four corner positions in the second corrected movement range 202 within the movement drive range 100, similarly to the above-described symbols C <b> 1 to C <b> 4. The control in this case is substantially the same as the codes C1 to C4.

  The movement target point in the self-diagnosis mode becomes more severe as the position away from the center point is set and both the X axis and the Y axis are driven. This is because the performance of the drive mechanism is generally best at the center, and the performance deteriorates as the distance from the center increases.

  Other configurations are substantially the same as those of the image blur correction apparatus of the first embodiment. In addition, about the structure which is not mentioned above, since it is a part which is not directly related to this invention and is the same as that of the above-mentioned 1st Embodiment, the illustration and detailed description are abbreviate | omitted.

  Next, in the image shake correction apparatus of the present embodiment, the operation when operating in the self-diagnosis mode will be described below with reference to FIGS. In the present embodiment, FIG. 10, FIG. 12, FIG. 13 and the like among the explanatory diagrams used in the first embodiment described above are used, and specific illustrations are omitted.

  When the image blur correction apparatus 20 according to the present embodiment operates in the self-diagnosis mode, as shown in FIG. 15, the stop accuracy diagnosis process in step S1 and the sine wave tracking accuracy diagnosis process in step S3 are sequentially executed. . That is, it differs from the first embodiment described above in that the drive current diagnosis process (step S2 in FIG. 8) is omitted.

  That is, FIG. 16 shows details of the stop accuracy diagnosis process in step 1 of FIG. As shown in FIG. 16, first, in step S11, the image blur correction control unit (50x, 50y) performs a process of moving the center point of the fourth lens group 14a to the reference designated position (symbol A in FIG. 7). Do. At the same time, a variable N = 0 representing the designated position is set. Thereafter, the process proceeds to step S12.

  That is, the image blur correction control unit (50x, 50y) indicates the reference designated position ((x coordinate, y coordinate) corresponding to the variable N = 0 representing the designated position from the self-diagnosis instruction value controller 58 as (x0, The instruction value indicating y0) and the symbol A) in FIG. 14 is output. This instruction value signal is input to the servo controller 54 via the deviation calculator 53. In response to this, the servo controller 54 generates a drive control signal corresponding to the input instruction value signal, and drives and controls the image blur correction drive unit 25 of the image blur correction apparatus 20 according to the generated signal. After that, the system waits for a predetermined time (first specified time T1; see FIG. 10) until the fourth lens group 14a is stabilized. At this time, the position detection circuit 57 detects the position of the fourth lens group 14 a based on the detection signals of the magnetic sensors 28 x and 28 y and inputs the detected position information to the deviation calculator 53. The deviation calculator 53 calculates a deviation based on the indicated value and the detected position information, and outputs the calculation result to the servo controller 54. In response to this, the servo controller 54 newly generates a drive control signal corresponding to the input instruction value signal, and drives and controls the image blur correction drive unit 25 (repeatedly thereafter).

  The situation at this time is the standby time (first specified time) indicated by reference numeral T1 in FIG. The diagram shown in FIG. 10 shows the change in the current position of the fourth lens group 14 a detected by the magnetic sensors 28 x and 28 y and the position detection circuit 57. In the initial drive period shown in FIG. 10, that is, during the waiting time T1, the current position of the fourth lens group 14a being driven changes toward the target position (in this case, the reference designated position A). Is in an unstable state. When the waiting time T1 has elapsed, the fourth lens group 14a is in a stable state. Therefore, the process proceeds to the next step S12 in FIG.

  In step S12, the image blur correction control unit (50x, 50y) executes a stop accuracy measurement process. This process is executed during the measurement time (second specified time) indicated by the symbol T2 shown in FIG. During the measurement time T2, the fluctuation between the target position (in this case, the reference designated position A) and the current position is stable as shown in FIG. 10, and the two seem to match at first glance. . However, as can be seen in the enlarged view indicated by the symbol S in FIG. Therefore, the stop accuracy measurement process executed in step S12 is a process for measuring the maximum value (deviation MAX) and the minimum value (deviation MIN) of the minute fluctuations. This process is obtained by the deviation calculator 53 performing a deviation calculation based on the detected position information signal (current position information) from the position detection circuit 57 and the indicated value signal. Here, the obtained “deviation MAX” and “deviation MIN” are output to the self-diagnosis determination controller 59.

  Next, in step S13 of FIG. 15, the image blur correction control unit (50x, 50y) determines a predetermined standard value ± P0 for “deviation MAX” and “deviation MIN” obtained in the processing of step S12 described above. Compare with. Here, the standard value ± P0 is a standard value serving as a diagnostic criterion for determining whether or not the image blur correction apparatus 20 is operating normally. It is assumed that the standard value data is stored in advance in the self-diagnosis determination controller 59, for example. In addition to this, for example, it is stored in advance in a storage medium provided in another part inside the image blur correction device 20, and is read as appropriate when performing the process of step S13. Also good. In the present embodiment, specifically, for example, a standard value ± P0 = ± 8 μm is set.

  In the processing of step S13, the image blur correction control unit (50x, 50y) determines that “deviation MAX> standard value P0” or “deviation MIN <standard value− (minus) P0”. If it is confirmed by 59, the determination result is output to a control unit (not shown) of the camera unit 10. In response to this, the control unit (not shown) of the camera unit 10 determines that the image blur correction apparatus 20 has a failure, abnormality, or the like. Thereafter, the process proceeds to step S27. Note that (deviation MAX) − (deviation MIN) may be calculated from the deviation MAX and the deviation MIN, and compared with the standard P0 ′ corresponding thereto.

  In step S <b> 27, the control unit (not shown) of the camera unit 10 controls the image blur correction device 20 to stop the operation of the image blur correction device 20 and control the reference designated position A to be maintained. To do. That is, the optical axis of the fourth lens group 14a is stopped so as to be maintained in a state where it matches the reference designated position A. At the same time, the control unit (not shown) of the camera unit 10 displays the determination result from the image blur correction device 20 as a communication means (not shown) such as the wired cable or wireless or a network (not shown). It transmits to the terminal device (not shown) connected via this. In response to this, the terminal device (not shown) executes processing for displaying “image blur correction device failure display” on the display screen of the image display device (not shown) (not shown in the flowchart). Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  As described above, when at least one of the current “deviation MAX” and “deviation MIN” exceeds the predetermined standard value ± P0 in the process of step S13, the image blur correction device 20 is informed. When it is determined that there is a failure, abnormality, or the like, and thereafter, the operation of the image blur correction device 20 is stopped. Therefore, in this case, the image blur correction operation is not executed. On the other hand, the image blur correction drive unit 25 is for stopping the fourth lens group holding member 14 at the reference designated position A that is the center of the optical axis. Perform motion control. Therefore, this enables the camera unit 10 to continue the image data acquisition operation. That is, the minimum necessary operation as the camera unit 10 is ensured. In addition, the image data obtained in that case can be good with little deterioration. If the deviation is remarkably bad with respect to the standard value ± P0, it is desirable to perform control to give an error display and stop the operation of the image blur correction drive unit 25.

  On the other hand, in the process of step S13, the image blur correction control unit (50x, 50y) does not satisfy “deviation MAX> standard value P0” or “deviation MIN <standard value− (minus) P0”. If it is confirmed by the determination controller 59, the process proceeds to the next step S15.

  In step S15, the image blur correction control unit (50x, 50y) sets a variable N = 1 representing the designated position. In this case, if the reference designated position A is moved to the code B (N), the target position B (N) = B1. Similarly, if the reference designated position A is moved to the code C (N), the target position C (N) = C1.

  Subsequently, in step S16, the image blur correction control unit (50x, 50y) designates the center point of the fourth lens group 14a as a designated position corresponding to a variable N = 1 representing the designated position (for example, the target position is represented by the code in FIG. 14). When B1 is set, a process of moving to the coordinates (x1, y0), and when the target position is set to the code C1 in FIG. 14 is moved to the coordinates (x1, y1)). This process is substantially the same as the process in step S11 described above. Thereafter, the process proceeds to step S17.

  Subsequently, in step S17, the image blur correction control unit (50x, 50y) executes a stop accuracy measurement process. This process is substantially the same as the process in step S12 described above. Thereafter, the process proceeds to step S18.

  In step S18, the image blur correction control unit (50x, 50y) compares the “deviation MAX” and “deviation MIN” obtained in the process of step S17 described above with a predetermined standard value ± P1. Here, the standard value ± P1 is a standard value that serves as a diagnostic criterion for determining whether or not the image blur correction apparatus 20 is operating normally, similarly to the standard value ± P0. The data of the standard value ± P1 is also stored in advance in, for example, the self-diagnosis determination controller 59 or another storage medium in the image blur correction device 20, and when performing the process of step S18. Read as appropriate.

  In general, the driving accuracy tends to decrease as the amount of movement increases, that is, as the moving amount moves to a peripheral region away from the central region. Therefore, the reference value of the stop accuracy may be set so that the drive accuracy of movement to the peripheral region is slightly lower than the drive accuracy in the central region, that is, the standard value P1> the standard value P0. good. In the present embodiment, for example, when the standard value ± P0 = ± 8 μm of the stop accuracy at the reference designated position A is set, when moving from the reference designated position A toward the peripheral region (target values B1, C1, etc.) The standard value of stopping accuracy ± P1 = ± 10 μm or the like is set. The process in step S18 is substantially the same as the process in step S13 described above.

  That is, in the process of step S18, the image blur correction control unit (50x, 50y) determines that “deviation MAX> standard value P1” or “deviation MIN <standard value− (minus) P1”. If it is confirmed by the controller 59, the process proceeds to step S51.

  That is, in the process of step S18, when at least one of “deviation MAX” and “deviation MIN” during movement to the target point B1 or C1 exceeds a predetermined standard value ± P1, It is determined that the shake correction apparatus 20 has a failure, an abnormality, or the like, or there is a sign thereof, and the process proceeds to step S51.

  In step S51, another target point, for example, the image blur correction control unit (50x, 50y), moves to the target point D (N) or E (N) as the designated position closer to the central region. Try. In other words, in step S51, the image blur correction control unit (50x, 50y) designates the center point of the fourth lens group 14a as the designated position corresponding to the designated position variable N = 1 (for example, the target position is represented by the symbol D1 in FIG. Is moved to coordinates (x1 / 2, y0), and the target position is moved to coordinates (x1 / 2, y1 / 2) when the target position is E1 in FIG. This process is substantially the same as the process in step S16 described above. Thereafter, the process proceeds to step S52.

  Subsequently, in step S52, the image blur correction control unit (50x, 50y) executes a stop accuracy measurement process. This process is substantially the same as the processes in steps S12 and S17 described above. Thereafter, the process proceeds to step S53.

  In step S53, the image blur correction control unit (50x, 50y) compares the “deviation MAX” and “deviation MIN” obtained in the processing of step S52 described above with a predetermined standard value ± P1. This process is substantially the same as the processes in steps S13 and S18 described above. Here, when at least one of “deviation MAX” and “deviation MIN” during movement to the target point D (N) or E (N) exceeds a predetermined standard value ± P1, It is determined that the shake correction apparatus 20 has a failure, an abnormality, or the like, or there is a sign thereof, and the process proceeds to step S27.

  In step S27, the control unit (not shown) of the camera unit 10 controls the image blur correction device 20 to stop the operation of the image blur correction device 20 and maintain the reference designated position A. To control. That is, the optical axis of the fourth lens group 14a is stopped so as to be maintained in a state where it matches the reference designated position A. At the same time, the control unit (not shown) of the camera unit 10 displays the determination result from the image blur correction device 20 as a communication means (not shown) such as the wired cable or wireless or a network (not shown). It transmits to the terminal device (not shown) connected via this. In response to this, the terminal device (not shown) executes processing for displaying “image blur correction device failure display” on the display screen of the image display device (not shown) (not shown in the flowchart). Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  On the other hand, in the processing of step S53, the image blur correction control unit (50x, 50y) does not satisfy “deviation MAX> standard value P1” or “deviation MIN <standard value− (minus) P1”. If it is confirmed by the determination controller 59, the process proceeds to the next step S54.

  In step S <b> 54, the control unit (not shown) of the camera unit 10 performs the movement in the designated direction in the image blur correction operation by the image blur correction apparatus 20 in the region with a small movement amount, that is, the second correction movement range 202. In addition, the movement amount for shake correction is limited. Thereafter, the process proceeds to step S23.

  In step S23, the image blur correction control unit (50x, 50y) increments the variable N at the designated position (N + 1), and proceeds to the next step S24.

  In step S24, the image blur correction controller (50x, 50y) checks whether or not the variable N = 5 at the designated position. Here, N = 5 is confirmed in the self-diagnosis mode in the four designated positions (reference numerals B1 to B4 or reference numerals C1 to C4 in FIG. 14) and the designated reference position (reference numeral A in FIG. 14). , D1 to D4, and E1 to E4) to measure the accuracy (that is, to repeat the process four times). Therefore, the number of measurement designated positions is not limited to this. In order to increase or decrease the designated position, the numerical value assigned to the variable N may be increased or decreased in the process of step S24.

  If N = 5 in the process of step S24, the series of processes is terminated and the process returns to the original process (return). If N = 5 is not confirmed, the process returns to step S51 and the subsequent processes are repeated.

  On the other hand, in the process of step S18, the image blur correction control unit (50x, 50y) does not satisfy “deviation MAX> standard value P1” or “deviation MIN <standard value− (minus) P1”. If it is confirmed by the determination controller 59, the process proceeds to the next step S28.

  In step S28, the image blur correction controller (50x, 50y) moves in the designated position direction in the image blur correction apparatus 20, that is, from the reference designated position A to the target point B1 based on the determination result obtained in step S18. Alternatively, it is determined that there is no problem in moving to C1. Thereafter, the process proceeds to the next step S23.

  In step S23, the image blur correction control unit (50x, 50y) increments the variable N at the designated position (N + 1), and proceeds to the next step S24.

  In step S24, the image blur correction controller (50x, 50y) checks whether or not the variable N = 5 at the designated position. Here, N = 5 is confirmed in the self-diagnosis mode in the four designated positions (reference numerals B1 to B4 or reference numerals C1 to C4 in FIG. 7) designated as the reference designated position (reference numeral A in FIG. 7). This is because the accuracy measurement is performed at (). Therefore, the number of measurement designated positions is not limited to this. In order to increase or decrease the designated position, a numerical value to be substituted into the variable N may be manipulated in the process of step S24.

  If N = 5 in the process of step S24, the series of processes is terminated and the process returns to the original process (return). If N = 5 is not confirmed, the process returns to step S16 and the subsequent processes are repeated.

  When the processing sequence in FIG. 16 is completed and the processing returns to FIG. 15, the sine wave tracking accuracy diagnosis processing in the next step S3 in FIG. 15 is executed. The details of the sine wave tracking accuracy diagnosis process are as shown in FIG. Note that the flowchart in FIG. 17 includes the same processing steps as in FIG. 11 in the first embodiment described above. Therefore, in FIG. 17, the same processing steps as those in FIG.

  First, in step S31 in FIG. 11, the image blur correction control unit (50x, 50y) performs a process of moving the center point of the fourth lens group 14a to the reference designated position (symbol A in FIG. 7). At the same time, a variable N = 0 representing the designated position is set. The process in step S31 is the same as the process in step S11 in FIGS. Thereafter, the process proceeds to step S32.

  In step S32, the image blur correction control unit (50x, 50y) generates a sine wave by controlling the self-diagnosis instruction value controller 58, thereby starting a sine wave drive for driving the fourth lens group 14a. . At this time, the fourth lens group 14a is at the designated position (currently the designated reference position A) by the process of step S31 described above. Therefore, when the sine wave driving is started in step S32, the fourth lens group 14a vibrates around the designated position (currently the designated reference position A). Then, after the sine wave drive is started, it waits for a predetermined time T1 (see FIG. 12) to elapse. Thereafter, the process proceeds to step S33.

  In order for the self-diagnosis instruction value controller 58 to generate a driving sine wave in the process of step S32, for example, the inside of itself (the self-diagnosis instruction value controller 58) or the image shake correction in advance. This is realized by referring to table data stored in another storage medium or the like inside the apparatus 20, or by the self-diagnosis instruction value controller 58 itself performing a trigonometric function calculation in an internal calculation circuit.

  Here, the change in the current position of the fourth lens group 14a detected by the magnetic sensors 28x and 28y and the position detection circuit 57 is the same as that in FIG. A symbol T1 shown in FIG. 12 is the predetermined time T1, which is the waiting time T1 after the start of driving and before the start of measurement. In this processing sequence, the accuracy measurement is waited during the initial drive period shown in FIG. 12, that is, during the standby time T1, and the sine wave tracking accuracy measurement process (the process of step S33 in FIG. 11) after the standby time T1 has elapsed. To start. As shown in FIG. 12, the actual vibration (displacement of the current position) due to the sine wave drive occurs slightly later than the supplied sine wave (drive wave).

  In step S33, the image blur correction control unit (50x, 50y) controls the deviation calculator 53 to execute a sine wave tracking accuracy measurement process. This measurement processing includes a detected position information signal from the position detection circuit 57 (current position information of the actual fourth lens group 14a) and a driving sine wave (instructions) output from the self-diagnosis instruction value controller 58. And a deviation calculation based on the value). The result is as shown in FIG. 13, for example. FIG. 13 is a diagram showing the deviation between the indicated value and the actual current location when sine wave driving is performed. Specifically, the sine wave tracking accuracy measurement process executed in the process of step S33 obtains the maximum value (deviation MAX) and the minimum value (deviation MIN) shown in the diagram of FIG. Here, the obtained “deviation MAX” and “deviation MIN” are output to the self-diagnosis determination controller 59. The accuracy measurement process is performed at a predetermined measurement time indicated by a symbol T2 in FIG. After the elapse of the predetermined measurement time (T2), the process proceeds to step S34.

  In step S34, the image blur correction control unit (50x, 50y) stops the sine wave drive.

  Subsequently, in step S35, the image blur correction control unit (50x, 50y) compares “deviation MAX” and “deviation MIN” obtained in the processing of step S33 described above with a predetermined standard value ± R0. I do. Here, the standard value ± R0 is a standard value serving as a diagnostic criterion for determining whether or not the image blur correction apparatus 20 is operating normally. The standard value data is stored in advance in, for example, the self-diagnosis determination controller 59 or another storage medium in the image shake correction apparatus 20, and is appropriately read when performing the process of step S35. To.

  In the process of step S35, the image blur correction control unit (50x, 50y) determines that “deviation MAX> standard value R0” or “deviation MIN <standard value− (minus) R0” is satisfied. Is confirmed, the determination result is output to a control unit (not shown) of the camera unit 10. In response to this, the control unit (not shown) of the camera unit 10 determines that the image blur correction apparatus 20 has a failure, abnormality, or the like. Thereafter, the process proceeds to step S27.

  In step S27, the control unit (not shown) of the camera unit 10 controls the image blur correction device 20 to stop the operation of the image blur correction device 20 and maintain the reference designated position A. To control. That is, the optical axis of the fourth lens group 14a is stopped so as to be maintained in a state where it matches the reference designated position A. At the same time, the control unit (not shown) of the camera unit 10 displays the determination result from the image blur correction device 20 as a communication means (not shown) such as the wired cable or wireless or a network (not shown). It transmits to the terminal device (not shown) connected via this. In response to this, the terminal device (not shown) executes processing for displaying “image blur correction device failure display” on the display screen of the image display device (not shown) (not shown in the flowchart). Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  On the other hand, in the processing of step S35, the image blur correction control unit (50x, 50y) is for self-diagnosis that “deviation MAX> standard value R0” or “deviation MIN <standard value− (minus) R0” is not satisfied. If it is confirmed by the determination controller 59, the process proceeds to the next step S37.

  In step S37, the image blur correction control unit (50x, 50y) sets a variable N = 1 representing the designated position. In this case, if the reference designated position A is moved to the code B (N), the target position B (N) = B1. Similarly, if the reference designated position A is moved to the code C (N), the target position C (N) = C1.

  Subsequently, in step S38, the image blur correction control unit (50x, 50y) performs a process of moving the center point of the fourth lens group 14a to a designated position N (for example, reference numeral B1 or C1 in FIG. 14).

  In step S39, the image blur correction control unit (50x, 50y) starts sine wave driving of the fourth lens group 14a and waits for a predetermined time T1 to elapse. Thereafter, the process proceeds to step S40. The process in step S39 is the same as the process in step S32 described above.

  In step S40, the image blur correction control unit (50x, 50y) controls the deviation calculator 53 to execute a sine wave tracking accuracy measurement process for a predetermined measurement time (see symbol T2 in FIG. 12). Then, after the predetermined measurement time (T2) has elapsed, the process proceeds to step S41. Note that the process of step S40 is the same as the process of step S33 described above.

  In step S41, the image blur correction control unit (50x, 50y) stops the sine wave drive (the same as the process in step S34 described above).

  Subsequently, in step S42, the image blur correction control unit (50x, 50y) compares the “deviation MAX” and “deviation MIN” obtained in the process of step S40 described above with a predetermined standard value ± R1. Do. Here, the standard value ± R1 is a standard value of a diagnostic standard corresponding to the designated position N when diagnosing whether or not the image shake correction apparatus 20 is operating normally. This standard value data is also stored in advance in, for example, the self-diagnosis determination controller 59 or another storage medium in the image blur correction apparatus 20, and is read out appropriately when performing the process of step S42. To.

  In the processing of step S42, the image blur correction control unit (50x, 50y) determines that “deviation MAX> standard value R1” or “deviation MIN <standard value− (minus) R1” is satisfied. If it is confirmed by the above, the process proceeds to step S55. That is, in the process of step S42, if at least one of “deviation MAX” and “deviation MIN” during movement to the target point B1 or C1 exceeds a predetermined standard value ± R1, It is determined that the shake correction apparatus 20 has a failure, abnormality, or the like, or there is a sign thereof, and the process proceeds to step S55.

  In step S55, another target point, for example, the image blur correction control unit (50x, 50y) moves to the target point D (N) or E (N) as the designated position closer to the central region. Try. In other words, in step S55, the image blur correction control unit (50x, 50y) designates the center point of the fourth lens group 14a as the designated position corresponding to the designated position variable N = 1 (for example, the target position is represented by reference numeral D1 in FIG. Is moved to coordinates (x1 / 2, y0), and the target position is moved to coordinates (x1 / 2, y1 / 2) when the target position is E1 in FIG. This process is substantially the same as the process in step S38 described above. Thereafter, the process proceeds to step S56.

  Subsequently, in step S56, the image blur correction control unit (50x, 50y) starts a sine wave drive, performs a sine wave accuracy measurement, and stops a sine wave drive (steps S32 to S34, step). Steps S39 to S41) are executed. Thereafter, the process proceeds to step S57.

  In step S57, the image blur correction control unit (50x, 50y) compares the “deviation MAX” and “deviation MIN” obtained in the process of step S56 described above with a predetermined standard value ± R1. This process is substantially the same as the process of step S42 described above.

  Here, if at least one of “deviation MAX” and “deviation MIN” during movement to the target point D (N) or E (N) exceeds a predetermined standard value ± R1, It is determined that the shake correction apparatus 20 has a failure, an abnormality, or the like, or there is a sign thereof, and the process proceeds to step S27.

  In step S27, the control unit (not shown) of the camera unit 10 controls the image blur correction device 20 to stop the operation of the image blur correction device 20 and maintain the reference designated position A. To control. That is, the optical axis of the fourth lens group 14a is stopped so as to be maintained in a state where it matches the reference designated position A. At the same time, the control unit (not shown) of the camera unit 10 displays the determination result from the image blur correction device 20 as a communication means (not shown) such as the wired cable or wireless or a network (not shown). It transmits to the terminal device (not shown) connected via this. In response to this, the terminal device (not shown) executes processing for displaying “image blur correction device failure display” on the display screen of the image display device (not shown) (not shown in the flowchart). Thereafter, the series of processing ends, and the processing returns to the original processing (return).

  On the other hand, in the process of step S57, the image blur correction control unit (50x, 50y) is for self-diagnosis that “deviation MAX> standard value R1” or “deviation MIN <standard value− (minus) R1” is not satisfied. If it is confirmed by the determination controller 59, the process proceeds to the next step S58.

  In step S58, the control unit (not shown) of the camera unit 10 performs the movement in the designated direction in the image blur correction operation performed by the image blur correction apparatus 20 in the region where the movement amount is small, that is, in the second correction movement range 202. In addition, the movement amount for shake correction is limited. Thereafter, the process proceeds to step S23.

  In step S23, the image blur correction control unit (50x, 50y) increments the variable N at the designated position (N + 1), and proceeds to the next step S24.

  In step S24, the image blur correction controller (50x, 50y) checks whether or not the variable N = 5 at the designated position.

  If N = 5 in the process of step S24, the series of processes is terminated and the process returns to the original process (return). If N = 5 is not confirmed, the process returns to step S55 and the subsequent processes are repeated.

  On the other hand, in the processing of step S42, the image blur correction control unit (50x, 50y) is for self-diagnosis that “deviation MAX> standard value R1” or “deviation MIN <standard value− (minus) R1” is not satisfied. If it is confirmed by the determination controller 59, the process proceeds to the next step S28.

  In step S28, the image shake correction control unit (50x, 50y) moves in the designated position direction in the image shake correction apparatus 20, that is, from the reference designated position A to the target point B1 based on the determination result obtained in step S42. Alternatively, it is determined that there is no problem in moving to C1. Thereafter, the process proceeds to the next step S23.

  In step S23, the image blur correction control unit (50x, 50y) increments the variable N at the designated position (N + 1), and proceeds to the next step S24.

  In step S24, the image blur correction controller (50x, 50y) checks whether or not the variable N = 5 at the designated position. Here, if N = 5, the series of processes is terminated and the process returns to the original process (return). If N = 5 is not confirmed, the process returns to step S38 and the subsequent processes are repeated.

  As described above, according to the second embodiment, the same effects as those of the first embodiment can be obtained. Furthermore, according to the present embodiment, by periodically operating in the self-diagnosis mode, it is possible to determine a malfunction or failure of the apparatus or a deterioration state of the apparatus, and notify that the time for repair or replacement is approaching. It is possible to accurately grasp in advance the possibility that a defect will occur. At the same time, based on the determination result of the malfunction or failure of the device or the degradation state of the device, the image blur correction operation is stopped or the blur correction movement amount in the image blur correction operation is set according to the degree of the degradation. By performing control such as limiting, that is, continuously obtaining an image data with good image quality with little deterioration while ensuring the necessary minimum operation as the imaging device (camera unit 10). Can do. Therefore, the image blur correction device 20 with high reliability can be realized, and it can contribute to the improvement of the reliability of the imaging device and the camera system to which the image shake correction device 20 is applied.

  In each of the above embodiments, the fourth lens group holding member 14 that holds the fourth lens group 14a, which is a part of the optical lenses constituting the imaging optical system, is used as a movable frame, and the fourth lens group holding member 14 is used. 2 illustrates an image blur correction apparatus 20 including a so-called lens shift type optical image blur correction mechanism in which image blur correction is performed by moving the lens in an XY plane orthogonal to the optical axis O of the imaging optical system. The present invention is not limited to this type of image blur correction apparatus. For example, the holding member that holds the image sensor is a movable frame, and the holding member (movable frame) is moved in a plane along the light receiving surface of the image sensor (in a plane orthogonal to the optical axis O of the imaging optical system). The present invention can be similarly applied to an image shake correction apparatus including a so-called sensor shift type optical image shake correction mechanism that performs a shake correction.

  Further, in each of the above embodiments of the present invention, a case where the present invention is applied to a fixed installation type camera (such as a surveillance or security camera or an in-vehicle camera) as an imaging device having an imaging function has been described. In addition, a general-purpose imaging device, that is, a general-purpose camera (for example, a digital single-lens reflex camera) used by a user (user) to hold in hand, a small device such as a portable communication terminal device, or a stationary device The present invention can also be applied to a camera or the like built in a type device (for example, a television receiver). In addition, even an industrial or medical optical instrument such as an endoscope or a microscope that has an imaging function can be similarly applied.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, you may delete some components of all the components shown by embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  It should be noted that even if the operation flow in the claims, the description, and the drawings is described using “first,” “next,” etc. for convenience, it is essential to carry out in this order. It doesn't mean. In addition, it goes without saying that the steps constituting these operation flows can be omitted as appropriate for portions that do not affect the essence of the invention.

  Of the technologies described here, many of the controls and functions mainly described in the flowcharts can be set by a program, and the above-described controls and functions can be realized by a computer reading and executing the program. it can. As a computer program product, the program may be recorded or stored in whole or in part on a portable medium such as a non-volatile memory such as a flexible disk or a CD-ROM, or a storage medium such as a hard disk or a volatile memory. It can be distributed or provided at the time of product shipment or via a portable medium or communication line. The user can easily realize the imaging apparatus of the present embodiment by downloading the program via a communication network and installing the program on a computer, or installing the program from a recording medium on the computer.

  Each processing sequence described in each of the above-described embodiments can allow a procedure to be changed as long as it does not contradict its nature. Therefore, for each of the above-described processing sequences, for example, the order of the processing steps is changed each time the processing order is changed, the processing steps are executed simultaneously, or a series of processing sequences are executed. It may be. That is, regarding the operation flow in the claims, the specification, and the drawings, even if it is described using “first,” “next,” etc. for convenience, it is essential to carry out in this order. It doesn't mean. In addition, it goes without saying that the steps constituting these operation flows can be omitted as appropriate for portions that do not affect the essence of the invention.

  Of the technologies described here, many of the controls and functions described mainly in the flowcharts are often settable by a software program. The computer program reads and executes the software program described above. Control and functions can be realized. The software program is a computer program product in advance in the product manufacturing process, such as the above-mentioned storage medium or storage unit, specifically a portable medium such as a flexible disk, CD-ROM, or non-volatile memory, a hard disk, or volatile. Electronic data that is stored or recorded in whole or in part on a storage medium such as a memory. Apart from this, it can be distributed or provided at the time of product shipment or via a portable medium or a communication line. Users can operate by downloading their software programs and installing them on a computer or installing them from a storage medium via a communication network or the Internet even after the product is shipped. As a result, the imaging apparatus of the present embodiment can be easily realized.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and applications can of course be implemented without departing from the spirit of the invention. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if several constituent requirements are deleted from all the constituent requirements shown in the above-described embodiment, if the problem to be solved by the invention can be solved and the effect of the invention can be obtained, this constituent requirement is deleted. The configured structure can be extracted as an invention. Furthermore, constituent elements over different embodiments may be appropriately combined. The invention is not limited by the specific embodiments thereof, except as limited by the appended claims.

  The present invention is an image pickup apparatus having an image pickup function and having an image shake correction mechanism, for example, a fixed installation type camera (such as a surveillance or security camera or an in-vehicle camera), and an image pickup apparatus of a general form, and a user (user The same applies to cameras in a general form that are held in hand, such as digital single-lens reflex cameras, compact digital cameras, lens-type cameras, and video cameras such as video cameras and movie cameras. it can. In addition to portable devices such as mobile phones and smartphones, small devices such as personal digital assistants (PDAs) such as electronic notebooks, stationary devices such as television receivers and personal computers The present invention is also applicable to a camera built in the camera. Furthermore, even an industrial or medical optical device such as an endoscope or a microscope that has an imaging function can be similarly applied.

DESCRIPTION OF SYMBOLS 1 ... Imaging device 2 ... Housing 3 ... Cover member 10 ... Camera unit 11 ... 1st lens group holding member 11a ... 1st lens group 12 ... 2nd lens group holding member 12a ... 2nd Lens group 13 ... Third lens group holding member 13a ... Third lens group 14 ... Fourth lens group holding member 14a ... Fourth lens group 14b ... Ball receiving part 14c ... Spring hook part 15 ... First 5 lens group holding member 15a ... 5th lens group 16 ... flexible printed circuit board 17 ... imaging board 17a ... imaging element 18 ... diaphragm mechanism 20 ... image blur correction device 21 ... lid member 21a ... opening 21d ... Screw insertion hole 22 ... Body member 22a ... Opening 22b ... Ball mounting portion 22d ... Screw holes 23, 24 ... Screw 25 ... Image blur correction drive unit 26x ... X coil 26y ... Y Coil 27x ... X magnet 27y ... Y magnet 28x ... X magnetic sensor 28y ... Y magnetic sensor 31 ... ceramic balls 32, 33 ... ball receiving plate 50x ... X image blur correction control unit 50y ... Image blur correction control unit for Y 51 …… Gyro sensor 52 …… Camera shake correction controller 53 …… Deviation calculator 54 …… Servo controller 55 …… Drive amplifier 56 …… Hall amplifier 57 …… Position detection circuit 58 …… Self Diagnosis instruction value controller 59 ... Self-diagnosis judgment controller T1 ... Standby time T2 ... Measurement time

Claims (8)

A fixed frame,
A movable frame for holding an optical lens or an image sensor;
A support member that supports the movable frame with respect to the fixed frame so as to be movable in a plane perpendicular to the optical axis of the optical lens or in a plane along the light receiving surface of the imaging element;
A drive unit having a magnet and a coil to drive the movable frame relative to the fixed frame;
A control unit that performs drive control of the drive unit;
A position detector that detects the position of the movable frame in the plane;
When the control unit drives and controls the movable frame to move to a predetermined target position via the drive unit, the position of the movable frame detected by the position detection unit and the predetermined target position A determination unit that detects a deviation and determines whether the apparatus is operating normally based on whether the deviation is within an allowable range;
In the image blur correction apparatus comprising:
The image blur correction device, wherein the control unit restricts the operation of the image blur correction device when the determination unit determines that the image blur correction device is not operating normally.   The image blur correction apparatus according to claim 1, wherein the limitation of the operation is to limit a moving range of the movable frame to a range narrower than normal.   The image blur correction apparatus according to claim 1, wherein the limitation of the operation is to stop the movement of the movable frame. The determination unit includes a second regulation after the first regulation time has elapsed after the control unit starts driving control so as to move the movable frame to a predetermined target position via the driving unit. In time,
Detecting the deviation between the position of the movable frame detected by the position detector and the predetermined target position;
The image according to any one of claims 1 to 3, wherein each of the maximum value and the minimum value of the deviation is compared with a predetermined reference allowable value to perform an operation determination. Shake correction device.   When the control unit moves the movable frame to a predetermined target position via the drive unit and performs drive control so that sine wave driving is performed around the predetermined target position, the position is A deviation between the actual position of the movable frame detected by the detection unit and a prescribed position to be located at the time of sine wave driving centered on the predetermined target position is detected, and the deviation is within a first allowable range. 4. The image blur correction apparatus according to claim 1, wherein whether or not the apparatus is operating normally is determined based on whether or not the apparatus is operating normally. 5.   Of the predetermined target positions, the first target position is a position in the vicinity of the peripheral edge within the movable range of the movable frame in the plane, and the apparatus is operating normally at the first target position. If it is determined that there is no movement, it is determined whether or not it is operating normally at the second target position that is closer to the center of the movable frame within the movable range than the first target position. 6. The image blur correction apparatus according to claim 1, wherein a moving range of the movable frame is limited to the second target position.   The image blur correction according to claim 6, wherein it is determined whether or not the second target position is operating normally, and the movement of the movable frame is stopped when the second target position is not operating normally. apparatus. A camera unit having an image sensor and an imaging optical system;
A housing that houses the camera unit;
A cover member that covers and protects a part of the camera unit;
An image pickup apparatus comprising: the image blur correction apparatus according to claim 1.

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