JP4682408B2 - Blur correction device, manufacturing method thereof, interchangeable lens, and camera system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a drive unit having an actuator including a coil, for example, a VCM (voice coil motor), and a shake correction apparatus that corrects image blur due to camera shake in a camera or the like, a manufacturing method thereof, an interchangeable lens, and a camera It is about the system.
[0002]
[Prior art]
Conventionally, this type of blur correction apparatus has driven a blur correction optical system by an actuator including a coil, for example, a drive unit having a VCM, to correct image blur.
[0003]
FIG. 4 is a perspective view showing a general structure of the VCM.
The VCM 40 is an actuator that includes a magnet 410, a yoke 420, a voice coil 430, and the like, and applies a principle that a force F is generated when a current i flows through the coil 430 in the magnetic field MF. The VCM 40 can drive the controlled object by controlling the current i flowing from the two coil ends 431 and 432 of the coil 430 and the direction of the current i.
[0004]
[Problems to be solved by the invention]
However, the conventional VCM 40 described above distinguishes two coil ends 431 and 432 having polarity in terms of the shape of the coil 430 at the time of wiring connection by soldering of the coil ends 431 and 432 in the manufacturing process of the drive unit. It was difficult to do.
[0005]
Usually, a component having a polarity (for example, an electrolytic capacitor) is often marked for distinction on both the outer shape of the component and the substrate to be mounted at the time of mounting. By mounting the marks together, there is no risk of soldering with the wrong polarity.
However, in the VCM 40, the coil 430 is simply a copper wire, and it is difficult to mark the two ends of the coil ends 431 and 432 (see FIG. 4) by distinguishing the two wires.
[0006]
Moreover, even if it can be distinguished, it is not easy to mark a copper wire as thin as the hair, and even if it can be marked, the visibility will be poor. For this reason, even if marking is performed on the board side or component side to be soldered, it becomes meaningless unless the poles on the coil side can be distinguished, and the solution to prevent wiring mistakes between the two is: Don't be.
[0007]
Also, if you make a mistake in wiring, you will have to perform subsequent repair work (rewiring). Again, because the two ends of the coil are very difficult to distinguish, make the same mistake. Easy to repeat.
When such a wiring mistake is made, even if the control unit tries to drive and control the actuator, the actuator is driven in the direction opposite to the instruction of the control unit.
[0008]
As described above, the conventional VCM is
(1) Easy to make wiring mistakes,
(2) It is difficult to apply markings to prevent wiring errors.
(3) Also, it is difficult to see even after marking.
(4) When repair work is performed after making a wiring mistake, similarly, it is easy to make a wiring mistake, and the number of repair work steps itself increases, resulting in a loss in terms of process and time.
And so on.
[0009]
The object of the present invention is to solve the above-mentioned problems and eliminate the need for wiring mistake prevention markings and repair work after wiring mistakes, greatly reducing the number of inconveniences in the manufacturing process. It is another object of the present invention to provide a shake correction apparatus, a method of manufacturing the same, an interchangeable lens, and a camera system that can achieve high efficiency both in terms of processes and time.
[0010]
In order to solve the above-mentioned problem, the invention of claim 1 includes a blur correction optical system (5) for correcting blur , and a first coil for driving the blur correction optical system (5) in the X-axis direction. A drive unit (40, 41, 6) for driving the blur correction optical system (5), which includes an actuator including a second coil for driving the blur correction optical system (5) in the Y-axis direction ; A control unit (4) for controlling the drive unit (40, 41, 6) so as to drive the blur correction optical system (5) to a target position obliquely viewed from the origin on the X, Y plane; A memory for storing the polarities of the first coil and the second coil as wiring information based on the direction in which the blur correction optical system (5) is driven when driving to the target position. parts (7), the blur correction apparatus wherein the control unit (4), the distribution The blur correction device is characterized in that a drive direction of the actuator is determined based on line information.
[0011]
According to a second aspect of the present invention, in the blur correction device according to the first aspect, the target position is set in a + 45 ° direction when viewed from the origin on the X and Y planes. Device.
[0012]
According to a third aspect of the present invention, in the shake correction apparatus according to the first or second aspect, the actuator is driven to detect the driving direction after the first coil and the second coil are connected to each other. A blur correction device including a direction detection unit (42, 43, S102).
[0013]
According to a fourth aspect of the present invention, there is provided a blur correction optical system (5) for correcting blur, a first coil for driving the blur correction optical system (5) in the X-axis direction, and the blur correction optical system (5). A drive unit (40, 41, 6) for driving the blur correction optical system (5), the first coil, and the second coil A storage unit (7) for storing wiring information of two poles of the second coil, and a control for determining the driving direction of the actuator based on the wiring information and controlling the driving unit (40, 41, 6). A shake correction device manufacturing method for manufacturing a shake correction device including a section (4), wherein the first coil and the second end of the second coil are connected by wire connection, After the wiring connection step, the eyes in the oblique direction as viewed from the origin on the X and Y planes A wiring information recognition step for recognizing wiring information based on the direction in which the blur correction optical system (5) is driven when the actuator is driven to drive the blur correction optical system (5) to a position ( S 100 to S 103) and a wiring information recognition and writing step (S 104) for writing the wiring information recognized in the wiring information recognition step (S 100 to S 103) in the storage unit (7). Is the method .
[0014]
According to a fifth aspect of the present invention, in the method for manufacturing a shake correcting apparatus according to the fourth aspect, the target position is set in a + 45 ° direction when viewed from the origin on the X and Y planes. This is a method of manufacturing a shake correction apparatus.
The invention of claim 6 is a blur correction optical system (5) for correcting blur, a first coil for driving the blur correction optical system (5) in the X-axis direction, and the blur correction optical system (5). A drive unit (40, 41, 6) for driving the blur correction optical system (5), and an X and Y plane, A control unit (4) for controlling the drive unit (40, 41, 6) to drive the blur correction optical system (5) to a target position in an oblique direction as viewed from the origin, and driving to the target position; A storage unit (7) for storing, as wiring information, polarities of the first coil and the second coil based on a direction in which the blur correction optical system (5) is driven when it is performed. In the interchangeable lens having the blur correction function, the control unit (4) includes the wiring information. Zui and, determining a driving direction of said actuator, an interchangeable lens according to claim.
The invention according to claim 7 is a blur correction optical system (5) for correcting blur, a first coil for driving the blur correction optical system (5) in the X-axis direction, and the blur correction optical system (5). A drive unit (40, 41, 6) for driving the blur correction optical system (5), and an X and Y plane, A control unit (4) for controlling the drive unit (40, 41, 6) to drive the blur correction optical system (5) to a target position in an oblique direction as viewed from the origin, and driving to the target position; A storage unit (7) for storing, as wiring information, polarities of the first coil and the second coil based on a direction in which the blur correction optical system (5) is driven when it is performed. In the camera system having a shake correction function, the control unit (4) includes the wiring information. Based on, determining a driving direction of said actuator, a camera system characterized.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a block diagram showing an embodiment of a shake correction apparatus according to the present invention.
The shake correction apparatus according to the present embodiment is built in an interchangeable lens 20 for a single-lens reflex camera that includes a shake correction mechanism that corrects a shake caused by camera shake or the like.
[0016]
The interchangeable lens 20 includes a shake detection sensor 1 and 2, a shake detection circuit 3, a lens side CPU 4, a shake correction lens 5, a motor drive circuit 6, an EEPROM 7, VCMs 40 and 41, and position detection sensors 42 and 43. Etc.
[0017]
The shake detection sensors 1 and 2 are sensors that detect vibration generated in the camera. The shake detection sensor 1 is an angular velocity sensor for pitching detection that detects an angular velocity around the x axis, and the shake detection sensor 2 is an angular velocity sensor for yawing detection that detects an angular velocity around the y axis. The blur detection sensors 1 and 2 output an angular velocity signal (blur detection signal) corresponding to the detected angular velocity to the blur detection circuit 3.
[0018]
The shake detection circuit 3 is a circuit that performs predetermined processing on the angular velocity signals output from the shake detection sensors 1 and 2. The shake detection circuit 3 includes a filter that removes a predetermined frequency component from the angular velocity signals output from the shake detection sensors 1 and 2 and an amplifier that amplifies the output signal of the filter.
[0019]
The lens side CPU 4 is a central processing unit for performing blur correction control. The lens side CPU 4 calculates a blur speed and a blur correction amount based on an output signal of the blur detection circuit 3, focal length information, photographing distance information, and the like. The lens-side CPU 4 calculates the difference between the position detection signal output from the position detection sensors 42 and 43 and the target drive position signal corresponding to the shake speed and the shake correction amount, and drives and controls the shake correction lens 5. Drive signals are output to the VCMs 40 and 41, respectively.
[0020]
VCMs 40 and 41 are motors for driving the blur correction lens 5. The VCM 40 is a motor for driving the blur correction lens 5 in the y-axis direction, and the VCM 41 is a motor for driving the blur correction lens 5 in the x-axis direction. When a drive current (drive signal) flows through the coils, the VCMs 40 and 41 generate electromagnetic forces in the y-axis direction and the x-axis direction, respectively.
[0021]
The blur correction lens 5 is a lens that constitutes at least a part of the photographing optical system and corrects blur by changing the photographing optical path. For example, the blur correction lens 5 is driven in a direction substantially orthogonal to the optical axis to correct blur.
[0022]
The blur correction lens 5 is a target to be driven by the above-described VCMs 40 and 41, and the blur correction lens 5 is driven by the VCMs 40 and 41 that can be driven independently in the biaxial directions of x and y. The VCMs 40 and 41 are controlled by independent drive signals from the lens side CPU 4. For this reason, the blur correction lens 5 is movable on a two-dimensional plane of x and y axes in the drawing.
[0023]
The position detection sensors 42 and 43 are sensors that detect the position of the shake correction lens 5. The position detection sensor 42 detects the position of the shake correction lens 7 in the y-axis direction, and the position detection sensor 43 detects the position of the shake correction lens 7 in the x-axis direction. The position sensors 42 and 43 feed back a position detection signal related to the position of the shake correction lens 5 to the lens side CPU 4.
[0024]
In this embodiment, the interchangeable lens 20 includes a rewritable non-volatile memory (hereinafter referred to as EEPROM) 7 and, for example, coil wiring information of VCMs 41 and 40 described later is written therein.
The lens side CPU 4 accesses the EEPROM 7 as necessary, refers to the wiring information in the EEPROM 7, controls the motor drive circuit 6, and drives the shake correction lens 5 via the VCMs 41 and 40.
[0025]
The coil ends 40y1 and 40y2 are the ends of coil wires extending from the VCM 40 that drives the shake correction lens 5 in the y-axis direction. Similarly, the coil ends 41x1 and 41x2 are the ends of the coil wires of the VCM 41 that drives the blur correction lens 5 in the x direction.
Here, the wiring between the two coil ends 40y1 and 40y2 and the motor drive circuit 6 is performed without any distinction in the manufacturing process (wiring connection step), and the coil end 40y1 and the coil end 40y2 are connected. Including the possibility of being miswired. Similarly, the coil ends 41x1 and 41x2 are not distinguished from each other at the time of wiring.
[0026]
In this state, when the lens side CPU 4 sends each drive signal to the VCM 40 in order to drive the blur correction lens 5, if the coil end 40 y 1 and the coil end 40 y 2 of the VCM 40 are wired incorrectly, The blur correction lens 5 moves in the direction opposite to the direction to be driven on the y axis.
The same applies to the VCM 41 in the x direction when the wirings of the coil ends 41x1 and 41x2 are misplaced.
[0027]
The adjustment device 100 includes a device-side CPU 101 that performs calculations, other processes, and the like, and can electrically communicate with the lens-side CPU 4 and the EEPROM 7 in the interchangeable lens 20 via electrical contacts 110 and 111.
This adjusting device 100 controls the motor drive circuit 6 via the lens side CPU 4 to drive the VCMs 40 and 41, and detects the moving direction of the blur correction lens 5 by the position detection sensors 41 and 43, so that FIG. Wiring information described in (1) is obtained, and the wiring information is written in the EEPROM 7.
Further, the adjusting device 100 is provided with a monitoring means (not shown), can monitor the moving direction of the VCMs 40 and 41, detect the moving direction without using the position detection sensors 41 and 43, and provide wiring information. It can also be obtained.
[0028]
FIG. 2 is a flowchart showing an adjustment procedure (wiring information detection / writing procedure) of the method of manufacturing the shake correction apparatus according to the present embodiment, and FIG. 3 is a control target (blur correction lens 5) when detecting the wiring information. It is a figure which shows a motion (position).
It is assumed that the blur correction lens 5 stands by at a predetermined position on the x and y planes before starting the adjustment. This position is known and may be anywhere as long as it is not restricted by a movable range or the like, but in the example of FIG. 3, the origin is the xy plane.
[0029]
The apparatus-side CPU 101 drives the blur correction lens 5 to a certain designated position with respect to the lens-side CPU 4 via the electrical contact 110 while the blur correction lens 5 is waiting at the origin of the xy plane. Instruct (S100).
In response to this instruction, the lens-side CPU 4 sends a drive signal to the motor drive circuit 6 so as to drive the shake correction lens 5 to the designated position, whereby a drive current flows through the VCMs 40 and 41, and the shake correction lens. 5 is driven.
[0030]
The apparatus-side CPU 101 monitors the direction in which the blur correction lens 5 is driven by the position detection sensors 42 and 43 after a waiting time until the blur correction lens 5 is driven (S101) (S102).
[0031]
The apparatus-side CPU 101 performs wiring of the VCMs 41 and 40 in the x and y axis directions based on the method shown in FIG. 3 to be described later depending on the direction monitored by the position detection sensors 42 and 43 (direction in which the blur correction lens 5 is driven). The situation is detected and the polarity is determined (S103).
The above S100 to S103 correspond to the wiring information confirmation process of the present invention.
[0032]
The apparatus-side CPU 101 independently adjusts the polarities (wiring conditions) of the VCMs 41 and 40 determined in S103 as adjustment values (wiring information) according to a predetermined format via the electrical contact 111 independently of the x-axis and y-axis. Then, writing to the EEPROM 7 (wiring information writing step), the adjustment work is completed.
[0033]
Next, a method for determining the wiring state (drive direction) of the VCM based on the movement of the shake correction lens 5 when the shake correction lens 5 is driven by the above procedure will be described with reference to FIG.
In the example of FIG. 3, the above-mentioned “designated position (target position)” is set in the + 45 ° direction when viewed from the origin on the x, y plane where the blur correction lens 5 can operate.
FIG. 3A is a diagram showing a designated position (target position), and FIG. 3B is a diagram showing a position after driving the blur correction lens 5.
[0034]
As shown in S <b> 100 and S <b> 101, the shake correction lens 5 starts to move in response to a driving instruction from the adjustment device 100. At this time, the blur correction lens 5 should be driven to the area A in FIG. 3B with respect to the designated position (target position) shown in FIG.
[0035]
If the position after driving is the B area, the blur correction lens 5 is driven in the designated direction in the x-axis direction, but is driven in the opposite direction in the y-axis direction. Thus, it can be seen that the coil connection of VCM 40 (only in the y-axis direction) was reversed.
[0036]
Similarly, when the blur correction lens 5 is driven to the C area, it can be seen that the wiring of the VCM 41 in the x-axis direction is reversed and the wiring of the VCM 41 in the y-axis direction is correct.
When driven to the D area, the blur correction lens 5 is driven in the direction opposite to the designated direction in both the x-axis direction and the y-axis direction. It can be seen that the coil connections (both y-axis and x-direction) were reversed.
[0037]
The adjustment device 100 writes the polarities of the VCMs 41 and 40 in the x and y axis directions determined as described above in the EEPROM 7 as adjustment values (wiring information).
Then, the interchangeable lens side CPU 4 always refers to this adjustment value when driving the normal blur correction lens 5 so that the blur correction lens 5 to be controlled is not driven in the reverse direction. For example, the EEPROM 7 stores coefficients corresponding to the areas A to D in FIG. 3, and the interchangeable lens side CPU 4 multiplies the original driving direction by the coefficient to determine the actual driving direction. The VCMs 40 and 41 may be driven and controlled.
[0038]
In this adjustment procedure, the movement distance of the driven blur correction lens 5 is not so important, and is meaningful in that it can be grasped in the actual driving direction. Also, as described above, by setting the target position in the + 45 ° direction, the wiring status can be detected simultaneously in the x and y axis directions by one drive, which is more efficient than checking by driving one axis at a time. is there.
[0039]
As described above, according to the present embodiment, after the coil ends are wired, the VCMs 40 and 41 are actually driven, and depending on the driving direction of the VCMs 40 and 41 at that time, the polarity of the wired two wires (wiring information) ) Can be detected.
Then, the detected polarity (wiring information) is written in the EEPROM 7 of the interchangeable lens 20. As a result, the lens-side CPU 4 can drive-control the VCMs 40 and 41 without changing the driving direction.
Therefore, the shake correction apparatus according to the present embodiment is
(1) Marking for pole distinction is no longer required on both the coil side and the wired side.
(2) Rewiring after wiring mistake is no longer necessary.
(3) Since there is no need to worry about incorrect wiring, it is efficient in terms of work, can be shortened in terms of work time, and is advantageous in terms of cost.
And so on.
[0040]
The present invention is not limited to the embodiment described above, and various modifications and changes are possible, and these are also within the equivalent scope of the present invention.
For example, the blur correction apparatus according to the present embodiment has been described as being incorporated in an interchangeable lens, but may be incorporated in a camera system in which a lens is interchangeable or a lens is integrated. The camera system is not limited to a silver salt film camera, and may be an electronic still camera, a movie camera (movie camera or 8 mm camera), or a video camera.
Although an example of wiring without distinguishing the polarity of the coil has been described, even if the present invention is applied to the result of distinguishing the polarity, the same effect can be obtained when there is an incorrect wiring.
[0041]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to detect the driving direction of the actuator including the coil only by performing a confirmation process after wiring of the coil end, thereby preventing wiring mistakes. Marking is not required, and there is no fear of wiring mistakes, and repair work after wiring mistakes is also unnecessary.
Therefore, it greatly reduces the number of inconveniences in the manufacturing process and contributes to higher efficiency in terms of time.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of a shake correction apparatus according to the present invention.
FIG. 2 is a flowchart showing an adjustment procedure (wiring information detection / writing procedure) in the method of manufacturing the shake correction apparatus according to the embodiment;
FIG. 3 is a diagram showing a movement (position) of a control target (blur correction lens 5) at the time of detection of wiring information in the method for manufacturing the blur correction apparatus according to the embodiment;
FIG. 4 is a perspective view showing a general structure of a VCM.
[Explanation of symbols]
20 Interchangeable lenses 1, 2 Shake detection sensor 3 Shake detection circuit 4 Lens side CPU
5 Shake correction lens 6 Motor drive circuit 7 EEPROM
40, 41 VCM
40y1, 40y2, 41x1, 41x2 Coil ends 42, 43 Position detection sensor 100 Adjustment device 101 Device side CPU
110,111 Electrical contact

Claims (7)

An image stabilization optical system for correcting image blur,
An actuator including a first coil for driving the blur correction optical system in the X-axis direction and a second coil for driving the blur correction optical system in the Y-axis direction, the blur correction optical system; A drive unit for driving
A control unit that controls the drive unit to drive the blur correction optical system to a target position in an oblique direction when viewed from the origin on the X and Y planes;
A storage unit that stores, as wiring information, polarities of the first coil and the second coil based on a direction in which the blur correction optical system is driven when driving to the target position; In the shake correction device provided,
The control unit determines a driving direction of the actuator based on the wiring information;
A blur correction device characterized by the above. The blur correction device according to claim 1,
The blur correction device, wherein the target position is set in a + 45 ° direction when viewed from the origin on the X and Y planes. The blur correction device according to claim 1 or 2,
A blur correction apparatus comprising: a driving direction detection unit that drives the actuator and detects the driving direction after the first coil and the second coil are connected to each other. An image stabilization optical system for correcting image blur,
An actuator including a first coil for driving the blur correction optical system in the X-axis direction and a second coil for driving the blur correction optical system in the Y-axis direction, the blur correction optical system; A drive unit for driving
A storage unit that stores wiring information of two poles of the first coil and the second coil;
A control unit that determines a driving direction of the actuator based on the wiring information and controls the driving unit;
A method of manufacturing a shake correction device for manufacturing a shake correction device comprising:
A wiring connection step of wiring connecting the two pole ends of the first coil and the second coil;
After the wiring connection step, when the actuator is driven so as to drive the blur correction optical system to a target position obliquely viewed from the origin on the X and Y planes, the blur correction optical system is driven. A wiring information recognition process for recognizing wiring information based on a direction;
A wiring information writing step of writing the wiring information recognized in the wiring information recognition step into the storage unit;
A method of manufacturing a shake correction apparatus comprising: In the manufacturing method of the blurring correction device according to claim 4,
The method for manufacturing a shake correction apparatus , wherein the target position is set in a + 45 ° direction when viewed from the origin on the X and Y planes. An image stabilization optical system for correcting image blur,
An actuator including a first coil for driving the blur correction optical system in the X-axis direction and a second coil for driving the blur correction optical system in the Y-axis direction, the blur correction optical system; A drive unit for driving
A control unit that controls the drive unit to drive the blur correction optical system to a target position in an oblique direction when viewed from the origin on the X and Y planes;
A storage unit that stores, as wiring information, polarities of the first coil and the second coil based on a direction in which the blur correction optical system is driven when driving to the target position; In the interchangeable lens having a shake correction function provided,
The control unit determines a driving direction of the actuator based on the wiring information;
An interchangeable lens characterized by An image stabilization optical system for correcting image blur,
An actuator including a first coil for driving the blur correction optical system in the X-axis direction and a second coil for driving the blur correction optical system in the Y-axis direction, the blur correction optical system; A drive unit for driving
A control unit that controls the drive unit to drive the blur correction optical system to a target position in an oblique direction when viewed from the origin on the X and Y planes;
A storage unit that stores, as wiring information, polarities of the first coil and the second coil based on a direction in which the blur correction optical system is driven when driving to the target position; In a camera system having a shake correction function provided,
The control unit determines a driving direction of the actuator based on the wiring information;
A camera system characterized by

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