JP2000250086A - Shake correcting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of a noise due to an impact against a mechanical end when the correcting means falls down by gravity, irrespective of the using posture of equipment on which a shake correcting device is loaded. SOLUTION: The device is provided with the correcting means for correcting image blurring caused by the shake of the equipment on which the shake correcting device is loaded, a position detecting means for detecting the position of the correcting means, control means 211 to 234 for changing the image blurring correcting characteristic of the correcting means in the case a signal showing that the actuation of the correcting means is unnecessary is inputted from the aforesaid equipment, and then, gradually moving the correcting means to the mechanical end based on the output of the position detecting means obtained after changing the image blurring correcting characteristic.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a shake correcting device mounted on a device such as a camera and a video camera.

[0002]

2. Description of the Related Art Conventionally, in the field of photographing equipment such as a camera and a video camera, automation and other functions have been achieved in all aspects such as exposure setting and focus adjustment, so that good photographing can be easily performed. I have. In recent years, a shake correction device for correcting camera shake has been put to practical use. In particular, in a small video camera, the use of a recent high-magnification lens causes noticeable camera shake on the telephoto side and significantly lowers the quality of an image. Therefore, the shake correction device has become an essential function.

FIG. 6 shows a simple structure of a lens having a shake correcting function. In FIG. 6, reference numeral 701 denotes a lens barrel, 702 denotes a fixed first lens group,
Reference numeral 3 denotes a second lens group for performing a magnification operation, reference numeral 704 denotes an aperture, reference numeral 705 denotes a third lens group (hereinafter, referred to as a shift lens) for performing image blur correction caused by camera shake or the like, and reference numeral 706 denotes the magnification. This is a fourth lens group having both a focus surface correction function and a focus adjustment function by the lens 703. Reference numeral 707 denotes an image sensor, and light passing through the lens is imaged here.

FIG. 7 is a perspective view showing the configuration of an image stabilizing unit including the shift lens 705 and holding the shift lens 705 so as to be movable in a direction perpendicular to the optical axis.

Reference numeral 9 denotes a holding frame for the shift lens 705,
As shown, three guide pins 11 are integrally held by the holding frame 9 by press-fitting or bonding. These are arranged at approximately 120 ° intervals about the optical axis. Each of the guide pins 11 is fitted with a guide portion protruding from the intermediate lens barrel 5. The guide portion is fitted in the optical axis direction and has a long hole in the circumferential direction. Further, a guide plate 16 is provided between the intermediate barrel 5 and the holding frame 9, and the guide plate 16 has two sets of elongated holes whose central axes are orthogonal to each other, protruding from the intermediate barrel 5 and the holding frame 9, respectively. Is fitted with the pin.

With the above configuration, the holding frame 9 is positioned relative to the intermediate lens barrel 5 in the optical axis direction and the rotation direction (roll direction) with respect to the optical axis center, and the lateral direction (yaw direction). , And is guided so as to be rotatable only in the vertical direction (pitch direction).

Here, a voice coil motor is used to drive the shift lens 705 in a direction perpendicular to the optical axis. The intermediate lens barrel 5 has a magnet 13 (13a, 13a).
b) and the back yoke 12 (12a, 12a)
b) is fixed. The upper yoke 15 is also fixed to the intermediate lens barrel 5 so as to have a certain distance from the magnet. These may be based on adhesion or magnetic biasing force between the magnet 13 and the upper yoke 15. A coil 14 is arranged between them and is held integrally with the holding frame 9.

When an electric current is applied to the coil configured as described above, an electromagnetic force is generated, and the shift lens 705 is "floated" in the lens barrel so that its center is the center of the optical axis, and a direction perpendicular to the optical axis. To generate a force for moving to Since the components constituting the voice coil are arranged in two sets at right angles as shown in FIG.
A driving mechanism is realized in combination with the above-described mechanism.

Next, as the position detector at the time of driving the shift lens 705, a position detector in which a magnet and a Hall element are opposed to each other is used. This is described in, for example,
No. 136207. Reference numeral 17 (17a, 17b) denotes a magnet and a yoke in contact with the magnet, and is magnetized so as to have a magnetic gradient in the driving direction of the shift lens 705. 18 (18a, 1
Reference numeral 8b) denotes a Hall element, which is provided at a position facing the magnet 17 with an interval therebetween. Reference numeral 19 denotes a sensor holder, which holds the Hall element 18 and is itself equipped with the intermediate lens barrel 5.
Is held in. As in the case of the actuator, two sets are arranged in a direction orthogonal to each other.

With the above configuration, the position of the shift lens 705 in the driving direction can be detected. The position detection method is not limited to this method.
Various methods are conceivable, such as a method in which a slit is provided between the (semiconductor position detector) and iRED (infrared light emitting diode).

As described above, the components shown in FIG. 7 constitute one anti-vibration unit, and the shift lens 705 for performing the shake correction moves in the up, down, left, and right directions orthogonal to the optical axis. The optical axis is changed in accordance with the magnitude of the shake of the device to correct hand shake and the like.

Next, control of the shift lens 705 will be described.

FIG. 8 is a block diagram showing an example of a circuit configuration of a shake correction device including the image stabilizing unit and its control system. Originally, control is separately performed in two directions, vertical (pitch) and horizontal (yaw), but since the configuration is exactly the same, only one side is shown in FIG.

In FIG. 8, reference numeral 101 denotes a vibrating gyroscope, which is attached to the device, and when a vibration occurs,
A signal corresponding to the shake is output. 102 is a high-pass filter (hereinafter, HPF), 103 is an amplifier for amplifying a signal, 104 is a low-pass filter (hereinafter, LPF).
Thus, a predetermined frequency limit and amplification are applied to the output signal of the vibrating gyroscope 101 to generate a shake signal. This shake signal is input to a microcomputer (hereinafter referred to as IS microcomputer) 119 that performs control relating to shake correction,
The A / D converter 105, HPF 106, phase compensation circuit 107 and integrator 108 pass through the image stabilization unit 1.
16 (including the shift lens shown in FIG. 7) is calculated. This signal is sent to IS microcomputer 11
9 is output as, for example, a PWM output. The PWM output is converted by the D / A converter 112 into an analog signal.

On the other hand, the movement of the shift lens in the image stabilizing unit 116 is determined by the position detecting sensor 117 such as the above-described Hall element.
Is amplified by the amplifier 118 and added as a feedback signal to the target value by the adder 113.
An error amount is calculated. The drive circuit 115 drives the image stabilizing unit 116 via the amplifier 114 based on the calculated error amount.

By performing the above operation in both the vertical (pitch) direction and the horizontal (yaw) direction, camera shake correction (image shake correction) of a device such as a camera is performed.

Reference numeral 120 denotes a microcomputer (hereinafter, referred to as a mode microcomputer) which monitors the state of, for example, a switch of the camera, and performs a mode transition of the camera. 12
Reference numeral 1 denotes a power switch, 111 denotes an output setting circuit for setting a target value to a preset state, and 110 denotes whether an output from the IS microcomputer 119 is used as an integrator output or an output of the output setting circuit 111. This is a changeover switch for switching.

In the above-described image stabilizing apparatus, during normal use, since the shift lens in the image stabilizing unit having the configuration shown in FIG. 7 is located near the center of the optical axis by the voice coil motor, the power is particularly turned off. Occasionally, the shift lens falls under its own weight and hits the fixed lens barrel, generating unpleasant noise and lacking in quality.

Therefore, as an example for avoiding this, the state of the power switch 121 is detected by communication with the mode microcomputer 120 which monitors the state of the power switch 121, and when the power switch 121 is turned off. There is a method in which the output of the IS microcomputer 119 is set to the output of the output setting circuit 111 by the changeover switch 110, and the output is changed so that the shift lens gradually moves downward, thereby eliminating the sound caused by the drop.

FIG. 9 is a flowchart showing an example of the operation of the control when the power switch is turned off. The operation will be described below with reference to FIG.

Referring to FIG. 9, in step 501, an initial setting of the IS microcomputer 119 is performed. Then, in the next step 502, the A / D converter 105 performs filtering on the shake signal taken into the IS microcomputer 119 to calculate a target value for driving the shift lens (anti-vibration (IS) control do). In the following step 503, the state of the setting flag 1 is checked. If this flag is set, the process proceeds to step 505, and if it is cleared, the process proceeds to step 504.

Although some setting flags appear in this flow, these flags are initially cleared by the initial setting in step 501. Therefore, when the normal image stabilization control is performed, the target value for driving the shift lens is always output from the IS microcomputer 119 in step 504. With this output, the shift lens 116 is actually moved.

Thereafter, in step 505, it is monitored whether or not there is a communication request from the mode microcomputer 120.
Proceeding to 6, the communication with the mode microcomputer 120 is performed, and data on the state of, for example, a camera equipped with the shake correction device is received. Specifically, it is the state of an external switch such as ON / OFF of image stabilization. In the next step 507,
From the communication data with the mode microcomputer 120, it is determined whether the power switch 121 is turned off. If the power switch 121 has been turned off, the process proceeds to step 508, where it is checked whether the setting flag 2 has been set. When the flow comes to step 508 for the first time, since the setting flag 2 has been cleared, the process proceeds to step 509. Then, in this step 509, the setting flag 1 is confirmed. Here, the setting flag 1 proceeds to step 510 for clearing, in which the target value output in the horizontal direction is set so that the shift lens (in the image stabilizing unit 116) is located at the center position. The target value output is set to a predetermined value (= set value A). The setting of the target value here is performed by switching the changeover switch 110 of FIG.

FIG. 10 is a diagram for simply explaining the relationship between the shift lens and the mechanical edge. If the center position is, the set value A at step 511 is indicated by, for example, as shown in FIG. Is set to the specified position. The reason why the shift lens is set to this position is to gradually move the shift lens to the mechanical end (the position indicated by) in order to prevent the shift lens from hitting the end and making a sound.
It takes time to move from the center position, and if you move the shift lens quickly so that it does not take much time, a sound that hits the mechanical edge will inevitably come out. This is to reduce the time as much as possible.

Then, in the next step 512, the setting flag 1 is set, and the process returns to the anti-vibration control in step 502. In the subsequent step 503, since the setting flag 1 is set, the process proceeds to step 504, so that the target value is not updated anew.

Next, when it comes to step 509 again,
Since the setting flag 1 is set, the flow proceeds to step 513. Then, in step 513, a value obtained by subtracting the set value B from the predetermined value is set as the predetermined value again. The set value B here is the difference between the above-described target value for moving the shift lens at a speed at which no sound is generated even when the shift lens hits a mechanical end. In the next step 514, it is determined whether the newly set predetermined value is the minimum value. The minimum value here is a target value such that the shift lens is located slightly outside the mechanical end. If the predetermined value is larger than the preset minimum value, the process proceeds to step 518, where the newly set predetermined value is output as the vertical direction output, and step 502 is performed.
Return to. Thereafter, in step 513, the shift lens is gradually moved in the end direction while gradually changing the predetermined value.

If the predetermined value has become equal to or less than the minimum value in step 513, the flow proceeds to step 515, and the predetermined value is set to the minimum value. Then, in the next step 516, the setting flag 2 is set, and in the following step 517, the power-off OK flag is set,
In step 518, a predetermined value (= lowest value) is output, and the process returns to step 502.

Thereafter, since the setting flag 2 is set, steps 502 to 508 are repeated, and the power off O is performed by communication with the mode microcomputer 120.
The K flag is recognized by the mode microcomputer 120, and the shift lens remains at the mechanical end position (FIG. 10) until the power is actually turned off. Will not do.

Next, when the power switch 121 is turned on immediately after the power switch 121 is turned off, in that case, in step 507, the mode microcomputer 120 is turned on.
Since there is no request to turn off the power supply from, the flow proceeds from step 507 to step 519. Then, in this step 519, the setting flag 1 is confirmed. If the power switch 121 is not switched off at all, the setting flag 1 remains cleared and normal control will be continued. However, after the power switch 121 is turned off even once, the power is actually turned off. If the power switch 121 is turned on again before is turned off, the process proceeds to step 520 because the setting flag 1 is set.

In step 520, all setting flags are cleared, and in step 521, the output is set to the integrator output. That is, all the flags become the same as the state after the initialization, and the changeover switch 1
The state of 10 is also returned to the same state as during normal control. Thus, after the power switch 121 is turned off, the power switch 121 is turned on again before the power is actually turned off.
In this case, the normal anti-shake control is performed immediately after that.

By the above operation, when the power is turned off, the shift lens is gradually lowered, so that the sound hitting the fixed lens barrel can be prevented.

[0032]

However, the above-mentioned conventional example is effective when a camera equipped with the above-described shake correcting device is held at a normal position with respect to the sound when the power is turned off. However, when the camera is held in a horizontal position or upside down, the effect cannot be obtained.

(Object of the Invention) An object of the present invention is to provide an apparatus for mounting a shake correcting apparatus in any state of use, which is caused by a fall due to the weight of the correcting means due to its own weight. It is an object of the present invention to provide a shake correction device capable of preventing a sound generated in the camera.

[0034]

In order to achieve the above object, according to the present invention, there is provided a correction means for correcting an image shake caused by a shake of a device on which a shake correction device is mounted, A position detection unit that detects the position of the correction unit, and when a signal that does not require the correction unit to function is input from the device, changes the image blur correction characteristic of the correction unit, and And a control means for gradually moving the correction means to a mechanical end based on the output of the position detection means.

According to another aspect of the present invention, a first detecting means for detecting a shake of a device on which a shake correction device is mounted, and a device for detecting a shake of the device. Correcting means for correcting image blur, second detecting means for detecting a displacement amount of the correcting means, first controlling means for controlling the correcting means based on an output of the first detecting means, Characteristic changing means for changing the characteristic of the first control means, second control means for controlling the correction means independently of the output of the first detection means, and an external switch of the device. Third detection means for detecting a state;
When the third detection means detects that the external switch is in a predetermined state, the control unit causes the characteristic change means to function, and thereafter, based on the output of the second detection means, A third aspect of the present invention provides a shake correction device including a third control unit that controls a position of the correction unit that functions as the control unit by causing the control unit to function.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 is a block diagram showing a circuit configuration of a shake correction apparatus according to a first embodiment of the present invention, showing both a horizontal (Yaw) direction and a vertical (Pitch) direction. . Here, the same functions as those in FIG. 8 are denoted by the same symbols, and A is added to the control in the horizontal direction and B is added to the control in the vertical direction.

Reference numeral 119 denotes the aforementioned IS microcomputer, 102A
(B) to 108A (B) are signal processing circuits similar to those described above, which also calculate a target value for moving the shift lens in the image stabilizing unit 116 from the output of the vibration gyro 101A (B). I have. 112A (B)-118A
(B) is a circuit of a drive system of the shift lens similar to that described above. Reference numeral 120 denotes the above-mentioned mode microcomputer, 121 denotes a power switch, 131A (B) denotes a variable gain amplifier for changing the gain of the driving system, and 130A (B) denotes a gain setting circuit for setting the gain of the variable gain amplifier. The variable gain amplifier 131A (B) is composed of, for example, a multiplying D / A, and can change the gain according to communication data from the IS microcomputer 119. 132A (B) is A /
The D converter 133A (B) is a position detection circuit that detects the movement amount (position) of the shift lens from the output of the sensor 117A (B).

When the gain of the variable gain amplifier 131A (B) is reduced by the gain setting circuit 130A (B), the control circuit cannot obtain a force enough to hold the shift lens 116 at the center position. A little displacement is caused by gravity. In the present embodiment, the state of the camera is detected by detecting this displacement, and the shift lens is always moved in the direction of gravity when the power is turned off.

FIGS. 2 and 3 are a part of a flowchart relating to the operation in the IS microcomputer 119. Since the normal IS control is the same as the conventional example, here the power supply OF
Only the sequence portion at the time of F is shown. The details will be described below with reference to this figure.

In FIG. 2, step 201 is a portion for determining whether or not the power switch 121 has been turned off from the contents of communication with the mode microcomputer 120 as in the conventional example, and the power switch 121 has been turned off. To step 202, and confirms whether the setting flag 2 is set. As shown in the conventional example, since all the setting flags used here are cleared by the initial setting, the setting flag 2 is cleared when the process first comes to the step 202, and the process proceeds to the step 203. In step 203, since the setting flag 1 is confirmed, the process proceeds to step 204 for clearing. In step 204, the setting flag 1 is set, and in step 205, the target value output in both the vertical and horizontal directions is set as the center value. In step 206, the output of the position sensor 117A (B) in both the vertical and horizontal directions at the center position is set. Is read by the position detection circuit 133A (B), and the vertical position is
1, and the horizontal position is stored in Y1. Then, in the next step 207, the gain setting circuit 13
By lowering the amplifier gain of the variable gain amplifier 131A (B) by 0A (B), a gain change, which is a feature of the present embodiment, is performed.

FIG. 4 is a diagram schematically showing how the shift lens in the image stabilizing unit 116 moves in the lens barrel due to the gain change.

In FIG. 4, reference numeral 401 denotes a lens barrel serving as a mechanical end. Reference numeral 402 denotes a position where the shift lens can move when the gain is lowered. For example, when the camera is tilted to the right by 45 °, the shift lens moves to the position 404 in FIG. 4 after changing the gain.
In FIG. 4, a to h are obtained by dividing a position where the shift lens can move into eight regions. This is because, in the present embodiment, in order to simplify the program, the directions in which the shift lens is finally moved are limited to eight directions. Further, a predetermined value G indicated by 403 indicates a threshold value for determining in which direction the shift lens has moved, which will be described later.

The shift lens moves as described above due to the gain change. In step 208, the vertical and horizontal position data at this time is read, and the vertical position data is stored in P2 and the horizontal direction is stored in Y2. I do. Then, in the next step 209, the difference between the center position and the position data after the gain change is calculated, and the differences in the vertical and horizontal directions are stored in P3 and Y3, respectively. Subsequent step 210 of FIG.
First, it is determined whether or not the absolute value of P3 is equal to or greater than a predetermined value G. This predetermined value G is the amount represented by 403 in FIG. 4. When the amount of deviation from the center position in each of the vertical and horizontal directions exceeds this predetermined value G, a motion has occurred in that direction. Will be.

If the absolute value of P3 exceeds the predetermined value G, the process proceeds from step 210 to step 211, where Y
It is determined whether the absolute value of 3 exceeds a predetermined value G. If the absolute value of Y3 does not exceed the predetermined value G, the process proceeds to step 212, where the target value in the horizontal direction is fixed at the center value. Then, in the next step 213, the sign of P3 is checked. If the sign is positive, the process proceeds to step 214, and the target value in the vertical direction is output as the set value A. Set value A here
Is equivalent to the set value A in the conventional example, and the processing here is equivalent to the conventional example. The position of the shift lens when the gain is lowered is a position in the area indicated by a in 402 in FIG. Then, in step 215, the P + flag is set,
Exit this sequence.

On the other hand, if P3 is negative in step 213, the flow advances to step 216 to output the vertical target value as the predetermined value B. The processing here corresponds to the case where the shift lens has moved to the position 407, for example, in the area e in FIG. In the next step 217, the P-flag is set and the process exits this sequence.
The set value B in the step 216 has the same size as the set value A but has the opposite sign.

If the absolute value of P3 is smaller than the predetermined value G in step 210, the process proceeds to step 218, where the target value in the vertical direction is set as the center value. Then, in the next step 219, a determination is made as to whether Y3 is positive or negative. This shows a case where the position of the shift lens has moved to, for example, 406 in FIG. In the following step 212, the Y + flag is set, and the process exits this sequence. If Y3 is negative in step 219, the process proceeds to step 222, where the lateral direction target value is set to a set value B,
In the next step 223, the Y-flag is set.

If the absolute value of P3 and the absolute value of Y3 are both equal to or greater than the predetermined value G, the process proceeds from step 211 to step 224, where the sign of P3 is first determined. If P3 is positive, a determination is made at step 225 as to whether Y3 is positive or negative. If Y3 is also positive, control proceeds to step 226, where both the target value in the vertical direction and the target value in the horizontal direction are set as the set value C. In this flow, the position of the shift lens is, for example, as shown in FIG.
404. The set value C here is 1 / √ (2) the set value A. This is to make the movement amount of the shift lens from the center position the same as the movement amount only in the vertical direction or only in the horizontal direction. Then, in the next step 227, the P + Y + flag is set, and the process exits this sequence.

If it is determined in step 225 that Y3 is negative, the process proceeds to step 228, in which the vertical target value is set as the set value C and the horizontal target value is set as the set value D. Here, the set value D has the same magnitude as the set value C and has the opposite sign. Then, in the next step 229, the P + Y-flag is set.

If it is determined in step 224 that P3 is negative, the process proceeds to step 230, where it is determined whether Y3 is positive or negative. If Y3 is positive, the vertical target value is set to the set value D and the horizontal target value is set in step 231 in step 231. Set direction target value to set value A
In a succeeding step 232, a P-Y + flag is set. If Y3 is negative in step 230, similarly, in step 233, the set value D is set in both the vertical and horizontal directions, and the PY-flag is set.

Next, when it comes to the power-off sequence,
Since setting flag 1 is set, step 2 in FIG.
From step 03, the process proceeds to step 235. At step 235, the predetermined value is changed according to the state of the data setting flag, as in the conventional example. In particular, when moving in both the vertical and horizontal directions, the amount of change of the predetermined value is set to 1 / √2 in the case of only the vertical or horizontal direction. In step 236, it is determined whether or not the target value output newly calculated in step 235 has exceeded a predetermined final set value.
The target value calculated in step 9 is output again. Steps 235 and # 239 are repeated until the predetermined value exceeds the final set value, and the shift lens gradually moves to the mechanical end until the predetermined value is reached. If the final set value is exceeded, in step 237, the value is fixed to a predetermined value, and in the next step 238, the setting flag 2 and the power-off OK flag are set. After that, since the setting flag 2 is set in step 202, the mode microcomputer 120 recognizes that the power can be turned off by communication, and the shift lens is at the mechanical end position until the power is actually turned off. That is, no sound is generated due to the self-weight drop of the shift lens when the power is turned off.

If the power is turned on again in the middle of the power-off sequence, the power-off request is canceled in step 201.
At 40, it is confirmed whether or not the setting flag 1 is set. If it is set, some processing is in progress, so that all flags are cleared and the target value output is returned to the integral output. In the case of the present embodiment, since the gain is changed, the gain setting is returned to the original. Thereby, the normal operation is performed.

As described above, when the power-off request is received, the direction in which the shift lens is deviated by its own weight is detected by changing the gain of the control system, and the shift lens is moved in that direction, so that the camera is in the correct position. Even when the shift lens does not exist, it is possible to prevent the sound generated when the shift lens falls from the center in the direction of gravity.

In the first embodiment, the movement direction of the shift lens is limited to eight directions for simplification of the program. However, the ratio of the movement amount in the vertical direction to the movement amount in the horizontal direction is checked. By setting the amount by which the shift lens is moved in accordance with the ratio in the vertical and horizontal directions, the shift lens can be moved in all directions.

When the camera is upward or downward, the shift amount of the shift lens is small even if the gain is lowered. In this embodiment, the shift lens moves in the lateral direction with respect to the normal position of the camera. However, in the case of upward or downward, there is no sound when the power is turned off,
No problem occurs.

(Second Embodiment) FIG. 5 is a block diagram showing a circuit configuration of a shake correction apparatus according to a second embodiment of the present invention. And the description is omitted.

In the second embodiment, the addition of the target value and the sensor output is performed inside the IS microcomputer 119. 302A (B) is an adder formed in the microcomputer, and 303A (B) is a variable gain amplifier also formed in the microcomputer.

In the case of the second embodiment, since the gain can be changed by software in the microcomputer, there is no need to add a circuit to the conventional example, unlike the first embodiment.

The difference between the flow in the microcomputer and the first embodiment is that there is no need to communicate with, for example, an external D / A or an electronic volume to change the gain. Is the same, and in this case as well as in the first embodiment, it is possible to eliminate harsh sounds caused by turning off the power supply even when the camera is not at the correct position.

According to each of the above embodiments, when the power switch is turned off (vibration proof OFF), the gain for driving the shift lens is reduced, and as a result, the lens moves in any direction of up, down, left and right. Is detected, and the shift lens is driven stepwise in the direction in which the shift lens has moved. After this operation is completed, for example, by turning off the power of the camera,
Even if the camera is not in the correct position, it is possible to prevent harsh noises generated between the shift lens and the lens barrel due to the weight of the shift lens when the power is turned off, thereby improving the quality of the product. Can be.

(Modification) In the above embodiment, a vibration gyro was used as a means for detecting a shake. However, an angular accelerometer, an accelerometer, a speedometer, an angular displacement meter, a displacement meter, and an image shake itself were used. Any method can be used as long as the shake can be detected, such as the method of detection.

Although the present invention has been described with respect to an example in which the present invention is applied to a lens of a single-lens reflex camera, various types of cameras such as an integrated camera, a video camera, and an electronic still camera,
Further, the present invention can be applied to optical devices and other devices other than cameras, devices applied to these cameras, optical devices and other devices, or elements constituting these devices.

[0063]

As described above, according to the present invention,
In any state of use of a device on which the shake correction device is mounted, a shake correction device capable of preventing a sound generated by an impact with a mechanical end due to a drop due to its own weight of the correction device. Can be provided.

[Brief description of the drawings]

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

FIG. 2 is a flowchart illustrating a part of an operation of a main part of the shake correction apparatus according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing a continuation of the operation in FIG. 2;

FIG. 4 is a diagram schematically illustrating how a shift lens moves in a lens barrel by changing a gain in the first embodiment of the present invention.

FIG. 5 is a block diagram illustrating a circuit configuration of a shake correction apparatus according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating a configuration of a lens having a general shake correction function.

7 is a perspective view showing a prevention unit for driving the shift lens of FIG. 6 in a direction orthogonal to the optical axis.

FIG. 8 is a block diagram illustrating a circuit configuration of a conventional shake correction apparatus.

FIG. 9 is a flowchart showing an operation of a main part of a conventional shake correction apparatus.

FIG. 10 is a diagram for explaining a relationship between a shift lens and a mechanical end in a conventional shake correction apparatus.

[Explanation of symbols]

 101A (B) Vibration gyroscope 116 Anti-vibration unit including cyst lens 119 IS microcomputer 102 Mode microcomputer 130A (B) Gain setting circuit 131A (B) Variable gain amplifier 133A (B) Position detection circuit 302A (B) Adder

Claims (7)

[Claims] 1. A correcting means for correcting an image blur caused by a shake of a device on which a shake correcting device is mounted, a position detecting means for detecting a position of the correcting means, and the functioning of the correcting means is unnecessary. Control to change the image blur correction characteristic of the correction unit and gradually move the correction unit to a mechanical end based on the output of the position detection unit after the change when the signal to be input is input from the device. A shake correction device comprising: 2. The control unit changes to an image blur correction characteristic that degrades the function of the image blur correction by the correction unit when a signal that makes it unnecessary to function the correction unit is input from the device. 2. The method according to claim 1, wherein
The shake correction device as described. 3. The control unit according to claim 2, wherein the control unit is configured to move the correction unit in a stepwise manner in any one of at least four directions based on an output of the position detection unit. The shake correction apparatus according to claim 1 or 2, wherein 4. A first detecting means for detecting a shake of a device on which a shake correcting device is mounted, a correcting means for correcting an image shake caused by a shake of the device, and detecting a displacement amount of the correcting means. A second detection unit, a first control unit that controls the correction unit based on an output of the first detection unit, a characteristic change unit that changes a characteristic of the first control unit, and the correction unit A second control means for controlling the correction means independently of an output of the first detection means, a third detection means for detecting a state of an external switch of the device, and a third detection means. When it is detected that the external switch is in a predetermined state, the characteristic changing means is activated,
Thereafter, based on the output of the second detection means, the second
And a third control means for controlling the position of the correction means serving as the correction means by causing the control means to function. 5. The image stabilizing apparatus according to claim 4, wherein the characteristic changing unit changes the image blur correcting characteristic to a function of reducing image blur correction by the correcting unit. 6. The method according to claim 1, wherein the second control unit controls the correction unit in a stepwise manner based on an output of the second detection unit after the characteristic changing unit functions. The shake correction device according to claim 4 or 5, wherein the shake correction device is a means for moving in one direction. 7. The state in which the external switch is in a predetermined state is a state in which the external switch has been switched to a position that does not require the functioning of the correction means. The shake correction device as described.