JP2002099016A - Blur correcting apparatus, method for manufacturing the same, interchangable lens and camera system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a wiring error, allow eliminating a marking for preventing the wiring error, etc., and a recovering work after the wiring error, drastically reduce the various troublesomenesses on manufacturing process and allow to enhance the efficiency in process and time. SOLUTION: An interchangeable lens is provided with a blur correcting optical system 5 correcting a blur, a driving circuit 6 driving VCMs 40, 41, a CPU 4 on the lens side controlling the driving circuit 6, an EEPROM 7 storing wiring information about two poles of each coil of the VCMs 40, 41. The CPU 4 on the lens side determines the direction of driving an actuator based on the wiring information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blur correction device provided with a drive unit having an actuator including a coil, for example, a VCM (voice coil motor), and for correcting image blur due to camera shake in a camera or the like. The present invention relates to a manufacturing method, an interchangeable lens, and a camera system.

[0002]

2. Description of the Related Art Heretofore, in this type of blur correction apparatus, an image blur has been corrected by driving a blur correction optical system by an actuator including a coil, for example, a drive unit having a VCM.

FIG. 4 is a perspective view showing a general structure of a VCM. The VCM 40 includes a magnet 410 and a yoke 420
And a voice coil 430, etc., and apply the principle that a force F is generated when a current i flows through the coil 430 in the magnetic field MF. This VCM 40
The control target can be driven by controlling the current i flowing from the two-pole coil ends 431 and 432 of the coil 430 and the direction of the current i.

[0004]

However, the above-described conventional VCM 40 has a disadvantage in that when the wiring is connected by soldering the coil ends 431 and 432 in the manufacturing process of the driving section,
Due to the shape of the coil 430, it was difficult to distinguish between the two coil ends 431 and 432 having polarity.

In general, a component having a polarity (for example, an electrolytic capacitor) is often marked at the time of mounting on both the outer shape of the component and the substrate on which the component is mounted. By mounting these marks together,
There is no danger of soldering with the wrong polarity. However, in the VCM 40, the coil 430 is simply a copper wire,
It is difficult to distinguish and mark two lines at the time of marking on the coil ends 431 and 432 (see FIG. 4).

[0006] Even if it can be distinguished, it is not easy to mark a copper wire as thin as hair, and even if it can be marked, the visibility is poor. For this reason, even if marking is performed on the board side or component side to be soldered, it will not be meaningless unless the poles on the coil side can be distinguished, and a solution to prevent wiring mistakes between them is No.

[0007] In addition, when a wiring error is made, a subsequent repair work (rewiring) must be performed, but also at this time, similarly, since the two wires at the coil end are very difficult to distinguish, It is easy to repeat the same mistake. When such a wiring error is made, the actuator is driven in the direction opposite to the direction of the control unit even if the control unit attempts to drive and control the actuator.

As described above, the conventional VCM is (1) easy to make a wiring error, (2) it is difficult to make a marking to prevent a wiring error, (3) it is hard to recognize even if it is marked, and (4) In the case where the repair work is performed after making a wiring mistake, similarly, there is a problem that the wiring mistake is easily made, the number of repair work steps increases, and the process and time are lost.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, eliminate the need for wiring mistakes, eliminate the need for marking for preventing wiring mistakes, and repair work after wiring mistakes. Image stabilization device that can greatly reduce the time and increase the efficiency both in terms of process and time.
An object of the present invention is to provide a manufacturing method, an interchangeable lens and a camera system.

[0010]

According to a first aspect of the present invention, there is provided a blur correction optical system comprising: a blur correction optical system for correcting blur; and an actuator including a coil. A driving unit (40, 41, 6) for driving
And a control unit (4) for controlling the driving unit, wherein the blur correction device includes a storage unit (7) for storing wiring information of the two poles of the coil, and the control unit is configured to perform control based on the wiring information. And determining a driving direction of the actuator.

According to a second aspect of the present invention, in the shake correction apparatus according to the first aspect, the driving section is configured such that ends of two poles of the coil are connected by wiring, and after the wiring of the coil is connected, the driving section controls the actuator. Drive (S100), a drive direction detector (42, 43, S1) for detecting the drive direction.
02), wherein the storage unit (7) is a writable nonvolatile memory, and the drive direction detection unit (42, 4).
The blur correction device is characterized in that wiring information of the two poles of the coil is written based on the detection result of 3) (S104).

According to a third aspect of the present invention, there is provided a blur correction optical system for correcting blur, and a drive unit having an actuator including a coil for driving the blur correction optical system.
A storage unit (7) for storing wiring information of the two poles of the coil, and a control unit (4) for determining a driving direction of the actuator based on the wiring information and controlling the driving unit. A) a method of manufacturing a blur correction device comprising: a wire connection step of wire-connecting the ends of the two poles of the coil; and driving the actuator after the wire connection step. A wiring information recognition step of recognizing wiring information based on the driving direction (S100 to S100).
S103) and a wiring information writing step of writing the wiring information recognized in the wiring information recognition step into the storage unit (S10).
And 4) a method of manufacturing a blur correction device including:

According to a fourth aspect of the present invention, there is provided a blur correction optical system for correcting blur, a drive unit having an actuator including a coil for driving the blur correction optical system, a control unit for controlling the drive unit, An interchangeable lens having a blur correction function comprising: a storage unit that stores wiring information of the two poles of the coil, wherein the control unit is configured to perform, based on the wiring information,
Determining a driving direction of the actuator.

According to a fifth aspect of the present invention, there is provided a blur correction optical system for correcting a blur, an actuator including a coil, a drive unit for driving the blur correction optical system, a control unit for controlling the drive unit, A camera system having a blur correction function comprising: a storage unit that stores wiring information of two poles of the coil, wherein the control unit determines a driving direction of the actuator based on the wiring information. This is a camera system characterized by the following.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described in more detail.
FIG. 1 is a block diagram showing an embodiment of a blur correction device 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, which has a shake correction mechanism for correcting shake due to hand shake or the like.

The interchangeable lens 20 includes shake detection sensors 1 and 2
A blur detection circuit 3, a lens-side CPU 4, a blur correction lens 5, a motor drive circuit 6, an EEPROM 7,
VCMs 40 and 41 and position detection sensors 42 and 43 are provided.

Each of the shake detection sensors 1 and 2 is a sensor for detecting a vibration generated in the camera. The blur detection sensor 1 has x
It is an angular velocity sensor for detecting pitching that detects an angular velocity about an axis, and the blur detection sensor 2 is an angular velocity sensor for detecting yaw that detects an angular velocity about the y-axis. The shake detection sensors 1 and 2 output an angular velocity signal (blur detection signal) corresponding to the detected angular velocity to the shake detection circuit 3.

The shake detection circuit 3 includes shake detection sensors 1 and 2
Is a circuit that performs a predetermined process on the angular velocity signal output by. The blur detection circuit 3 includes a filter that removes a predetermined frequency component from the angular velocity signals output from the blur detection sensors 1 and 2, an amplifier that amplifies the output signal of the filter, and the like.

The lens-side CPU 4 is a central processing unit for performing shake 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, shooting distance information, and the like. The lens-side CPU 4 calculates a difference between a position detection signal output from the position detection sensors 42 and 43 and a target drive position signal corresponding to the shake speed and the shake correction amount, and controls the drive of the shake correction lens 5. The drive signals are output to the VCMs 40 and 41, respectively.

The 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.
The CM 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 coil, the VCMs 40 and 41 respectively move in the y-axis direction and x
Generates electromagnetic force in the axial direction.

The blur correction lens 5 constitutes at least a part of the photographing optical system, and corrects blur by changing the photographing optical path. The blur correction lens 5 is driven, for example, in a direction substantially orthogonal to the optical axis to correct blur.

The blur correction lens 5 is provided with the above-described VCM 4
The drive of the blur correction lens 5 is performed by the VCM 4 that can be driven independently in the x- and y-axis directions.
0,41. The VCMs 40 and 41 are controlled by respective independent drive signals from the lens side CPU 4. For this reason, the shake correction lens 5 is provided with x,
It is movable on a two-dimensional plane of the y-axis.

The position detection sensors 42 and 43 are sensors for detecting the position of the blur correction lens 5. The position detection sensor 42 detects the position of the blur correction lens 7 in the y-axis direction,
The position detection sensor 43 detects the position of the blur correction lens 7 in the x-axis direction. The position sensors 42 and 43 output position detection signals relating to the position of the shake correction lens 5 to the lens side CPU.
Give feedback to 4.

In this embodiment, the interchangeable lens 20 includes a rewritable nonvolatile memory (hereinafter referred to as an EEPROM) 7 therein.
Forty coil wiring information is written. Lens CPU
4 accesses the EEPROM 7 as needed,
The motor drive circuit 6 is controlled with reference to the wiring information in the EEPROM 7, and the blur correction lens 5 is driven via the VCMs 41 and 40.

The coil ends 40y1 and 40y2 are the ends of the coil wires coming from the VCM 40 that drives the blur correction lens 5 in the y-axis direction. Similarly, coil end 41x
1, 41x2 is the end of the coil wire of the VCM 41 that drives the blur correction lens 5 in the x direction. Here, the wiring between the two wires of the coil ends 40y1 and 40y2 and the motor drive circuit 6 is performed without any distinction in the manufacturing process (wiring connection process), and the coil end 40y1 and the coil end 40y2. And the possibility that they are wired interchanged. Similarly, for the coil ends 41x1 and 41x2, no distinction is made between the two wires at the time of wiring.

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 40y1 and the coil end 40y2 of the VCM 40 are wired in a wrong manner. In this case, the shake correction lens 5 moves in the direction opposite to the direction on the y-axis to be driven. The VCM 41 in the x direction also
The same applies when the wirings of the coil ends 41x1 and 41x2 are interchanged.

The adjusting device 100 includes a device-side CPU 101 for performing calculations, other processes, and the like.
0, 111, the lens side CP in the interchangeable lens 20.
It can electrically communicate with U4 and EEPROM 7. The adjustment 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. Is obtained, and the wiring information is written in the EEPROM 7. Further, the adjusting device 100 is provided with monitoring means (not shown), which can monitor the moving direction of the VCMs 40, 41, detect the moving direction without using the position detection sensors 41, 43, and output the wiring information. You can also get.

FIG. 2 is a flowchart showing an adjustment procedure (wiring information detection / writing procedure) of the method of manufacturing the blur correction apparatus according to the present embodiment, and FIG. 3 is a control object (blur correction) at the time of detecting wiring information. It is a figure showing movement (position) of lens 5). It is assumed that the blur correction lens 5 is waiting at a predetermined position on the x, y plane before the adjustment is started. This position is
It is known and may be anywhere as long as it is not restricted by the movable range or the like, but in the example of FIG. 3, the origin is on the xy plane.

The apparatus-side CPU 101 includes a blur correction lens 5.
Are waiting at the origin of the xy plane, the electrical contacts 11
0, the lens-side CPU 4 is instructed to drive the blur correction lens 5 to a specified position (S
100). 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 blur correction lens 5 to the specified position.
A drive current flows through 0 and 41, and the blur correction lens 5 is driven.

The apparatus-side CPU 101 includes a blur correction lens 5.
After the elapse of the waiting time until the is driven (S10
1) The direction in which the blur correction lens 5 is driven is monitored by the position detection sensors 42 and 43 (S102).

The device-side CPU 101 includes a position detecting sensor 4
Based on the direction monitored by the lens 2 or 43 (the direction in which the blur correction lens 5 is driven), based on the method of FIG.
The wiring status of the VCMs 41 and 40 in the x and y axis directions is detected, and the polarity is determined (S103). S above
Steps 100 to S103 correspond to the wiring information confirmation step of the present invention.

The apparatus-side CPU 101 adjusts the polarities (wiring status) of the VCMs 41 and 40 determined in S103 in accordance with an adjustment value (wiring information) according to a predetermined format.
Writing into the EEPROM 7 via the electrical contact 111 independently on the x-axis and the y-axis (wiring information writing step);
Finish the adjustment work.

Next, referring to FIG. 3, when the blur correction lens 5 is driven by the above procedure,
A method of determining the wiring state (driving direction) of the VCM based on the movement of the VCM will be described. 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 on which the blur correction lens 5 can operate. FIG. 3A is a diagram illustrating a designated position (a target position), and FIG. 3B is a diagram illustrating a position of the blur correction lens 5 after driving.

As shown in S100 and S101, the blur correction lens 5 starts moving in response to a driving instruction from the adjusting device 100. At this time, the shake correction lens 5 is originally
With respect to the designated position (target position) shown in FIG.
It should be driven to the A area of (b).

If the position after the driving is the area B, the blur correction lens 5 is driven in the specified direction in the x-axis direction, but in the opposite direction in the y-axis direction. This means that the drive has been performed, and that the coil connection (only in the y-axis direction) of the VCM 40 has been reversed.

Similarly, when the blur correction lens 5 is driven to the area C, 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. In addition, when driven in the D area, the blur correction lens 5 is driven in the x-axis direction and the y-axis direction in a direction opposite to the specified direction.
It can be seen that the coil connections 40 and 41 (both in the y-axis and the x-direction) were reversed.

The polarity of the VCMs 41 and 40 in the x- and y-axis directions determined as described above is written into the EEPROM 7 by the adjustment device 100 as adjustment values (wiring information). Then, the interchangeable lens-side CPU 4 controls the normal blur correction lens 5.
By always referring to this adjustment value at the time of driving, 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. VCM40,
41 may be controlled.

In this adjustment procedure, the movement distance of the driven blur correction lens 5 is not so important, and is significant in that it can be grasped in the actual driving direction. In addition, as described above, by setting the target position in the + 45 ° direction, one drive drives both the x and y axis directions simultaneously.
Wiring status can be detected, and it is more efficient than driving and checking one axis at a time.

As described above, according to the present embodiment, after wiring the coil ends, the VCMs 40 and 41 are actually driven, and the polarity of the two wired wires depends on the driving direction of the VCMs 40 and 41 at that time. (Wiring information) can be detected. And the detected polarity (wiring information)
Is written into the EEPROM 7 of the interchangeable lens 20. As a result, the lens-side CPU 4 can control the driving of the VCMs 40 and 41 without making a mistake in the driving direction. Therefore, the shake correction apparatus according to the present embodiment
(1) Marking for pole distinction is no longer required on both the coil side and the wiring side. (2) Rewiring after wiring error is no longer required. (3) Care must be taken to avoid incorrect wiring. Therefore, there are advantages that work efficiency is high, work time can be reduced, cost is advantageous, and the like.

Various modifications and changes are possible without being limited to the embodiment described above, and these are also within the equivalent scope of the present invention. For example, the blur correction device according to the present embodiment has been described as being incorporated in an interchangeable lens, but may be built into a lens-replaceable or lens-integrated camera system. Further, the camera system is not limited to a silver halide film camera, but may be an electronic still camera, a movie camera (movie camera or 8 mm camera), or a video camera. Although an example in which wiring is performed without discriminating the polarity of the coil has been described, even if the present invention is applied to the result of discriminating the polarity, a similar effect can be obtained in the case where there is an erroneous wiring.

[0041]

As described above in detail, according to the present invention, the driving direction of the actuator including the coil can be detected only by performing a confirmation work after the wiring at the coil end. There is no need for marking to prevent wiring errors, and there is no danger of wiring errors.
In addition, repair work after a wiring error is not required. Therefore,
It greatly reduces the complexity of the manufacturing process and contributes to higher efficiency in terms of time.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an embodiment of a shake correction apparatus according to the present invention.

FIG. 2 is a flowchart illustrating an adjustment procedure (a procedure for detecting and writing wiring information) of the method of manufacturing the shake correction apparatus according to the embodiment.

FIG. 3 is a diagram illustrating a movement (position) of a control target (the blur correction lens 5) when detecting wiring information in the method of manufacturing the blur correction device according to the embodiment.

FIG. 4 is a perspective view showing a general structure of a VCM.

[Explanation of symbols]

 Reference Signs List 20 interchangeable lens 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 end 42, 43 position detection sensor 100 adjustment device 101 Device side CPU 110, 111 Electrical contact

Claims (5)

[Claims] 1. A blur correction optical system that corrects blur, a drive unit that has an actuator including a coil and drives the blur correction optical system, and a control unit that controls the drive unit The apparatus according to claim 1, further comprising a storage unit configured to store wiring information of two poles of the coil, wherein the control unit determines a driving direction of the actuator based on the wiring information. 2. The blur correction device according to claim 1, wherein the driving unit has two ends of the coil connected to a wire, and drives the actuator after the coil is connected to a wire. A driving direction detection unit that detects a driving direction, wherein the storage unit is a writable nonvolatile memory;
2. The blur correction device according to claim 1, wherein wiring information of two poles of the coil is written based on a detection result of the driving direction detection unit. 3. A blur correction optical system for correcting blur, a drive unit having an actuator including a coil and driving the blur correction optical system, and a storage unit for storing wiring information of two poles of the coil, A control unit that determines a driving direction of the actuator based on the wiring information and controls the driving unit; and a method of manufacturing a blur correction device including a control unit that controls the driving unit. A wiring connection step of wiring connection at the end of the wiring, and after the wiring connection step, the actuator is driven, and based on the driving direction, a wiring information recognition step of recognizing wiring information, and a wiring information recognition step. A wiring information writing step of writing wiring information into the storage unit; 4. A shake correction system comprising: a shake correction optical system that corrects shake, an actuator including a coil, and a drive unit that drives the shake correction optical system; and a control unit that controls the drive unit. An interchangeable lens having a function, comprising: a storage unit for storing wiring information of two poles of the coil, wherein the control unit determines a driving direction of the actuator based on the wiring information. lens. 5. A shake correction system comprising: a shake correction optical system for correcting shake, an actuator including a coil, a drive unit for driving the shake correction optical system, and a control unit for controlling the drive unit. A camera system having a function, comprising: a storage unit that stores wiring information of the two poles of the coil, wherein the control unit determines a driving direction of the actuator based on the wiring information. system.