JPH07191360A - Vibration-proofing controller for camera - Google Patents

Abstract

PURPOSE:To provide a vibration-proofing controller for a camera which does not require decision whether vibration-proof control operation is performed or not at the time of photographing from a camera user. CONSTITUTION:The shake of the camera(camera shake) at the time of photographing is detected by a detection means 11 such as an angular velocity sensor, etc., and the magnitude of the shake is compared with a specified threshold and discriminated by a shake amount discrimination means 13 based on output from the detection means. Whether the vibration-proofing is necessary or not is decided by a vibration-proofing judgement means 112 in accordance with the output from the means 13 by also setting photographing information such as the focal length of a lens and shutter speed as judging reference. In the case of the vibration-proofing is necessary and effective, the vibration- proofing control operation is performed by using a correction optical means (correction lens, etc.) by a vibration-proofing starting means 115. In this device, the camera user need not judge the necessity of vibration-proofing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera anti-vibration control device for mounting on a camera.

[0002]

2. Description of the Related Art Recently, a video camera having an image blur prevention function for preventing image blur caused by camera shake at the time of shooting has been commercialized, and a research and development of a still camera having an image blur prevention function has been conducted. It is being advanced.

Various types of image blur prevention devices (hereinafter referred to as image blur prevention control devices) for preventing image blurring even when the camera vibrates during shooting have already been proposed. There is.

An outline of a known image stabilization control apparatus proposed by the present applicant will be described below with reference to FIG.

FIG. 11 is a schematic view of a lens barrel equipped with an image stabilization control device proposed by the present applicant, and is a diagram for explaining an outline of the image stabilization control device.

In the figure, reference numeral 82 is an outer cylinder of the lens barrel, 84 is an inner cylinder housed in the outer cylinder 82, and 83p is attached to the outer peripheral surface of the inner cylinder 84 and is a vertical lens barrel. Angular displacement detecting means for detecting the angular displacement of the shake P (pitching), 83y is attached to the outer peripheral surface of the inner cylinder 84 and detects the angular displacement of the lateral shake Y (yaw) of the lens barrel. Detecting means 80 is a correction lens for preventing image blurring on the surface of the film 88 even if the lens barrel shakes. 81 holds the lens 80 so that it can move vertically and laterally. A correction lens holding frame, which is arranged facing the rear end surface of the inner cylinder 84, 86p is attached to the holding frame 81 and is one of first electromagnetic driving means for moving the holding frame 81 in the vertical direction. Coil forming part, 86 Is a coil which is attached to the holding frame 81 and constitutes a part of a second electromagnetic driving means for moving the holding frame 81 in the lateral direction, and 87p is a coil which vertically moves the holding frame 81. Vertical position detecting means for detecting the position and movement amount when moved by the driving means, and 87y is a horizontal movement amount when the holding frame 81 is moved in the horizontal direction by the second electromagnetic driving means, It is a lateral position detecting means for detecting the position. Angular displacement detection means 8
3p and 83y are composed of a detection means composed of a known gyro or the like of a goniometer and an arithmetic circuit for integrating an angular velocity output and converting it into an angular displacement. Further, the position detecting means 87p and 87y for detecting a change in the position of the correction lens holding frame 81 and the like are a light projecting element including an infrared light emitting diode and a known PSD (Position sens).
ing device). The outputs of the angular displacement detection means 83p and 83y (that is, the vibration sensor) and the output signal of the correction lens position detection means (PSD) are taken into a control circuit (not shown), and after predetermined processing is performed by the control circuit, The position control and drive control of the correction lens 80 are performed by driving the two electromagnetic drive means including the coils 86p and 86y by the output signal from the control circuit. Hereinafter, a structure including the correction lens 80 and the lens holding frame 81 will be referred to as a correction optical unit 85.

Next, a specific structural example of the lens barrel described with reference to FIG. 11 will be described with reference to FIGS.
12 and 13 are exploded perspective views of another lens barrel having substantially the same structure as the lens barrel described in FIG. 11, viewed from the object side (that is, from the front) in FIG. The outer cylinder 82 and the angular displacement detecting means 83p and 83y of 11 are not shown. Further, a concrete example of the control circuit not shown in FIG. 11 is shown in FIG.

Since the reference numerals used in FIG. 11 are different from the reference numerals used in FIGS. 12 to 13, the structure indicated by the reference numeral in FIG. 11 is given before the description of FIGS. 12 to 13. Correspondence relationships between the elements and the constituent elements displayed in FIGS. 12 to 13 will be described in advance.

In FIGS. 12 and 13, 710 is the same as in FIG.
11, a lens barrel corresponding to the inner cylinder 84, 71 is a correction lens corresponding to the correction lens 80 shown in FIG.
Reference numeral 71 denotes a lens support frame corresponding to the correction lens holding frame 81 of FIG. 11, and a coil 79 attached to the lens support frame 71.
11 is a coil corresponding to the coil 86p of FIG. 11, a coil 79y attached to the support frame 71 is a coil corresponding to the coil 86y of FIG.
Two light projecting elements 76p and 76 attached to the place
y is the two PSDs attached to the lens barrel 710
The position detecting means 724 and 724 are paired with the position detecting elements 78p and 78y, respectively, and correspond to the position detecting means 87p and 87y in FIG.

As described above, the correspondence between the structure shown in FIGS. 12 to 13 and the structure already described with reference to FIG. 11 has been clarified. Therefore, the applicant of the present invention shown in FIGS. A specific example of the prior art will be described.

In FIG. 12, reference numeral 91 is a magnetic pole unit which constitutes a vertical electromagnetic driving means together with the coil 79p. The magnetic pole unit 91 is arranged in the recess 710pb on the rear end face of the lens barrel 710, and the yoke 712p ₃ is the yoke 712y. ₃ is inserted into the coil 79p and fixed to the lens barrel 710. Further, the magnetic pole unit 92 is a magnetic pole unit that constitutes an electromagnetic driving means in the lateral direction, and is the lens barrel 7.
It is arranged in the concave portion 710yb on the rear end surface of the device 10, is inserted into the coil 79y, and is fixed to the lens barrel 710. The magnetic pole units 91 and 92 are each configured by sandwiching two magnets between three yokes,
The unit 91 includes three yokes 712p _{1 to} 712p ₃
Two magnets 713p are sandwiched and held between the magnetic pole units 92, and the magnetic pole unit 92 includes three yokes 712y _1- .
Two magnet 713y during 712Y ₃ is in the clamp holding structure.

The correction lens support frame 72 is held by a support arm 75 shown in FIG. 13 and is supported by the arm 75 so as to be movable in the vertical and horizontal directions.
Reference numeral 5 is attached to a claw portion 710a on the rear end surface of the lens barrel 710.

Reference numeral 93 denotes a locking device or locking means for inhibiting the movement of the correction lens support frame 72, and an electromagnetic plunger 719 for locking and unlocking the support frame 72 and an unlocked state. And a spring 720 for moving the support frame 72, which is arranged so as to face a lower portion on the rear end side of the support frame 72 and is fastened with a screw to the rear end surface of the lens barrel 710.

Two electromagnetic drive means coils 79p and 7
Correcting optical means drive control circuit 9 for driving and controlling 9y
4 is connected to both coils 79p and 79y, and is also connected to two position detection elements 78p and 78y such as PSD, which are position detection signal output means of the correction lens support frame 72, and a camera control circuit (not shown) and It is also connected to the lens barrel control circuit.

In the above, the correspondence between the configuration shown in FIGS. 12 to 13 and the image stabilization control device described in FIG. 11 has been clarified, so that the configuration shown in FIGS. The preceding example of the image stabilization control apparatus will be further described.

As shown in FIG. 13, the correction lens support frame 7
A bearing 73y is press-fitted into the bearing 2, and a support shaft 74y is axially slidably supported by the bearing 73y. The recess 74ya of the support shaft 74y is fitted into the claw 75a of the support arm 75 shown in FIG. Further, as shown in FIG. 13, the bearing 73p is also press-fitted into the support arm 75, and the support shaft 74p is supported so as to be slidable in the axial direction.

Projector mounting holes 72pa, 72 of the support frame 72
In ya, light projecting elements 76p and 76y such as IRED-LEDs.
Are bonded, and the terminals are soldered to the lids 77p and 77y (which are bonded to the support frame 72) also serving as the connection board. The support frame 72 is provided with slits 72pb and 72yb, and the light projected by the light projecting elements 76p and 76y is slit 72pb.
PSD (position detection element) described later through b and 72yb
It is incident on 78p and 78y.

Coils 79p and 79y are also bonded to the support frame 72, and terminals are soldered to the lids 77p and 77y. Support balls 711 are fitted (three places) in the lens barrel 710, and the recesses 74pa of the support shaft 74p are fitted in the claw portions 710a of the lens barrel 710.

Yokes 712p ₁ , 712p ₂ , 712p
₃ , the magnet 713p is laminated and adhered, and similarly, the yokes 712y ₁ , 712y ₂ , 712y ₃ , and the magnet 7 are attached.
13y is also laminated and adhered. Note that the polarities of the magnets are arranged as indicated by arrows 713pa and 713ya.

The yokes 712p ₂ and 712y ₂ are lens barrels 71.
It is screwed into the 0 recessed portions 710pb and 710yb.

Position detection elements 78p and 78y such as PSD are adhered to the sensor seats 714p and 714y (714y is not shown), covered with sensor masks 715p and 715y, and a flexible printed circuit board (hereinafter abbreviated as flexible) 71.
The terminals of the position detecting elements 78p and 78y are soldered to the terminal 6. Dowels 714pa, 7 of the sensor seats 714p, 714y
14ya (714ya is not shown) is fitted into the mounting holes 710pc and 710yc of the lens barrel 710, and the flexible stay 71
At 7, the flexible member 716 is screwed to the lens barrel 710. The ears 716pa and 716ya of the flexible cable 716 are the lens barrel 71, respectively.
Through the holes 710pd and 710yd of 0, the yoke 712
It is screwed onto p ₁ and 712y ₁ . Coil terminal cover 7
The coil terminals and the projector terminals on 7p and 77y are the ear portions 716pa and 716ya and the land portion 716 of the flexible cable 716, respectively.
b and a polyurethane copper wire (three twisted wires).

An electromagnetic plunger 719 is screwed to the chassis 718 of the locking means 93, one end of the plunger 719 is fitted into a lock arm 721 charged with a spring 720, and the arm 72 is secured by a shaft screw 722.
1 is rotatably screwed to the chassis 718.

The chassis 718 of the locking means 93 is a lens barrel 71.
The terminal of the electromagnetic plunger 719 is soldered to the land 716b of the flexible member 716.

The adjusting screw 723 (3 places) having a spherical tip has the yoke 712p and the chassis 7 of the lock device 63.
18 is threaded and penetrated, and the adjustment screw 723 and the support ball 71
1 sandwiches the sliding surface of the support frame 72 (hatched portion 72c in FIG. 13). The adjusting screw 723 is screwed and adjusted so as to face the sliding surface 72 with a slight clearance.

The cover 724 is adhered to the lens barrel 710 and covers the correction optical means described above.

Corrective optical means drive control circuit 9 shown in FIG.
In 4, the output of the position detection elements 78p and 78y is supplied to the amplifier circuit 7
When amplified by 27p and 727y and input to the coils 79p and 79y, the support frame 72 is driven and the position detection element 78p,
The output of 78y changes. Here coils 79p, 79y
When the driving direction (polarity) of the coil 7 is set to a direction in which the outputs of the position detection elements 78p and 78y become smaller (negative return), the coil 7
Position detection elements 78p, 78 due to the driving force of 9p, 79y
The support frame 72 stabilizes at a position where the output of y becomes substantially zero.

The compensating circuits 728p and 728y are circuits for stabilizing the control system, and the driving circuits 729p and 72p.
9y is a circuit for compensating for the current applied to the coils 79p and 79y.

When command signals 730p and 730y are externally applied to the circuit 94 from a control circuit (not shown), the support frame 72 is driven extremely faithfully to the command signals 730p and 730y.

A method for controlling the coil by negatively returning the position detection output in this way is called a position control method, and the command signal 73 is used.
If the amount of camera shake is given as 0p and 730y, the support frame 72
Is driven in proportion to the amount of camera shake.

FIG. 14 is a detailed view of the correction optical means drive control circuit 94 for driving the correction optical means, which shows the pitch direction p.
Only the control system of (FIG. 12) is shown. (Yaw direction y has the same structure).

In FIG. 14, the current-voltage conversion amplifier 7
32pa and 732pb convert the photocurrents 731pa and 731pb generated in the element 78p by the light incident on the position detecting element 78p from the light projecting element 76p into a voltage, and the differential amplifier 733p each current-voltage converting amplifier 732pa and 732p.
The difference in output of pb (output proportional to the position of the support frame 72 in the pitch direction p) is obtained. The current-voltage conversion amplifier 7
32pa, 732pb and the differential amplifier 733p correspond to the amplifier circuit 727p of FIG.

The command amplifier 734p adds the command signal 730p to the output of the differential amplifier 733p, and the drive amplifier 73
Enter in 5p. The drive circuit 729p in FIG. 12 includes a drive amplifier 735p, transistors 736pa and 736pb, and a resistor 737p.

Resistors 738p and 739p and capacitor 7
40p is a known phase lead circuit, and corresponds to the compensation circuit 728p in FIG.

The adding amplifier 741p is a sum of outputs of the current-voltage converting amplifiers 732pa and 732pb (position detecting element 78).
The sum of the amount of light received by p) is calculated and input to the light emitting element drive amplifier 742p.

Since the projection amount of the light projecting element 76p changes extremely unstablely with respect to temperature and the like, the differential amplifier 7 accordingly.
Although the position detection sensitivity of 33p changes, the light projecting element is driven by the total light receiving amount of the position detecting element 78p as described above (when the total light receiving amount decreases, the light receiving amount constant control that increases the light emitting amount of the light projecting element 76p). This reduces the change in position detection sensitivity.

[0036]

The above-described prior art image stabilization control device for a camera has the following practical problems to be improved. In order to clarify the problem, the relationship between the camera model and the image stabilization control device will be described below.

When the photographer takes a picture of the subject, the photographer comprehensively judges from the focal length of the camera, the shutter speed, and the state of camera shake through the viewfinder, and the photographer selects whether the image stabilization control device is on or off. Do. For example, even if the camera has a long focal length of 300 mm and the camera shake through the viewfinder is noticeable, if the shutter speed is as high as 1/500, there is no need for image stabilization. Conversely, even if the camera shake is not noticeable at the focal length of about 100 mm. If the shutter speed is as low as 1/60, blurring will be recorded on the image plane, so image stabilization is necessary.

That is, the photographer is required to have the ability to instantaneously select ON / OFF of the image stabilization control device from various information.
This is extremely troublesome for general users.
Further, although the number of operation switches has been increasing in recent cameras, it is not preferable for the user to provide a switch for image stabilization.

Of course, in any shooting state, if the image stabilization is always performed, the above-mentioned problem does not occur, but the early consumption of the battery due to the constant image stabilization becomes a new problem.

The image stabilization control apparatus shown in FIGS.
This is an example of a single-lens reflex camera that can be attached to and detached from the camera. In general, many single-lens reflex cameras have a high finder magnification, so that camera shake is easy to solve. Furthermore, since the shutter speed is displayed inside and outside the viewfinder, the photographer skilled as described above can turn on the image stabilization control device based on them.
The choice of off can be made.

However, the need for image stabilization is not limited to such a single-lens reflex camera, and the image stabilization control device must be installed in a camera such as a compact camera which is easier to operate. However, when the above-described known device is mounted on a compact camera, it is necessary to solve the following problems.

In general, most compact cameras have a viewfinder magnification that is not as high as that of a single-lens reflex camera, and therefore it is difficult to understand the camera shake. Furthermore, most compact cameras do not display shutter speed. Therefore, in a compact camera, the only criteria for determining whether the image stabilization control device is on or off are the focal length and the ambient brightness (the shutter speed is determined from the ambient brightness), and the image stabilization control device is turned on when shooting. There is also a failure to take a blurred photo without vibration isolation in the right situation.

Therefore, an object of the present invention is to prevent the above-mentioned shooting failure from occurring and not to ask the camera user to judge whether or not the image stabilization control device should be operated at the time of shooting. An object of the present invention is to provide an image stabilization control device, and also to provide a camera image stabilization control device having a function that can be installed in a compact camera.

[0044]

[Means for Solving the Problems] The above problems (that is,
To solve the problem that the camera user must judge whether or not the image stabilization control device should be operated at the time of image capture, or that the image is taken unsuccessfully because the image was captured without image stabilization. In order to do so, it is necessary to automatically determine (without asking the camera user to make a determination) whether to activate or stop the image stabilization control device.

Therefore, in the present invention, the output of the vibration detecting means and the photographing information of the camera (focal length, shutter speed, etc.)
Based on at least one of the above, the camera (control device mounted on the camera or image stabilization control device) automatically starts and stops the image stabilization operation.

[0046]

Embodiments of the present invention will be described below with reference to FIGS.

<First Embodiment> A first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a block diagram of a camera shake control apparatus according to the first embodiment of the present invention.

In FIG. 1, reference numeral 11 denotes an angular velocity sensor (vibration detecting means) such as a vibrating gyro, which is activated in response to a signal SW1 of a switch SW1 which is turned on by half-pressing a button (release means) of the camera. It has become so. Reference numeral 12 is a sensor output calculation circuit that integrates the output of the angular velocity sensor 11 to generate an angle output. Reference numeral 13 is a blur amount determination means for comparing the output of the angular velocity sensor 11 with a reference value (positive constant value const, negative constant value −const), and is output by the OR gate 13a when the amplitude of the blur angular velocity exceeds the reference range. To do. 14 is a sample hold circuit 1
4a and a differential circuit 14b, which is a target position setting means, and the sample hold circuit 14a holds the output of the sensor output calculation circuit 12 when the SW2 signal generated by pressing the release button of the release means 17 is input. . Until the SW2 signal is input, the sample hold circuit 14a
Is a sampled state, and therefore the same output is input to both input ends of the differential circuit 14b, and the output of the differential circuit 14b is zero. However, immediately after the SW2 signal is input, the sample hold circuit 14
When a is in the hold state, the differential circuit 1 starts from that point.
4b starts to output continuously from zero. That is, the target position setting means 14 substitutes for a switch for turning the output on and off, and a simple switch may turn on the switch to suddenly input a large input, but according to this configuration, the input from zero is input from the time when the SW2 signal is input. Begins.

Reference numeral 15 is an image stabilization input determining means, which is output when SW2 is on and the image stabilization determining means 112, which will be described later, is not output (the SW2 signal is input to the AND gate 15a, and the image stabilization determining means 112 is supplied to the inverter 15b. Are typing). Then, this output is input to the switching fixing means 123, and the switching fixing means 123 outputs for a period of t ₁ ′ (for example, 1 second) from the time of inputting this signal, and the switch 16a of the sensor output switching means 16 is connected to the terminal 16c. Connect (normally, switch 16a is connected to terminal 16b).

The image stabilization sensitivity changing means 19 amplifies the blur signal from the sensor output switching means 16 based on the output of the zoom position detecting means 118. This is because accurate image stabilization cannot be performed unless the driving amount of the correction optical unit for the blur signal is changed depending on the focal length of the lens. Anti-vibration sensitivity changing means 1
The output of 9 (corresponding to the command signals 730p and 730y in FIG. 12) is input to the driving means 110, and the correction optical means 111 is driven faithfully to this signal.

The drive coil of the correction optical means 111 (see FIG.
79p, 79y) are usually short-circuited at both ends. (The switch piece 121a of the correction optical means activation switch (SW) 121 is connected to the terminal 121c.). However, if the image stabilization continuation means 117 is input, the switch piece 12
1a is connected to the terminal 121b, and the correction optical means 111 is driven by the drive means 110. The exposure preparation means 114 generates S generated by pressing the release button of the release means 17 halfway.
Upon receiving the W1 signal, photometry (AE), shutter-speed setting, and distance measurement (AF) are performed. The exposure unit 116 receives the distance measurement signal from the exposure preparation unit 114 and drives the lens focus. The lens focusing drive may be performed in the exposure preparation unit 114. The exposure means 116 uses the SW2 signal for pressing the release button of the release means 17 to the off position, and the exposure preparation means 11
The shutter is opened / closed based on the shutter speed information of 4. The timer 1 (18) continues to output for t ₂ period (100 msec) after the signal of the shake amount determination means 13 is input, and when the signal of the shake amount determination means 13 is input again during this time, the output is extended. Do it. That is, the output is continued as long as the signal of the shake amount determination means 13 is continuously generated within t ₂ . The image stabilization determination unit 112 uses the timer 1 (1
8) signal (representing a large blur), shutter speed information from the exposure preparation means 14, focal length information by focusing, and focal length information from the zoom position detecting means 118, and calculates and shakes them. It judges whether or not it should be done, and outputs it when it is necessary to prevent vibration.

For example, when the product of the shutter speed and the focal length (for example, 1 / 60.times.300 = 5) is 1 or more and there is the output of the timer 1 (18), the output for image stabilization is output. Actually, this series of operations is processed by the microcomputer, and the flow starts by the signal input of the timer 1 (18) as shown in the flowchart of FIG. 2, and the shutter speed S of the camera is input in step 1. Then, the zoom focal length Z (for example, 300 mm) is calculated in step 2, S × Z is calculated in step 3, and when the value is smaller than 1, the process returns to step 1,
The next preparation is performed again, and when the value is greater than 1, the process proceeds to step 4 to output.

The image stabilization starting means 115 outputs from this output for the period t ₁ (for example, 1 second). t ₁ is set to the longest shutter speed at which image stabilization is possible. (If the shutter speed is too long, it will not be possible to perform accurate image stabilization because the camera shakes the body of the photographer at the time of shooting, and also contains the extremely low-frequency non-vibration component that cannot be isolated.) As described above, when the switch piece 121a of the correction optical means starting switch (SW) 121 is connected to the terminal 121b, the image stabilization is started. That is, the image stabilization is performed when the blur is large, the shutter speed is large, the focal length is large, and SW2 is on. The image stabilization continuation means 117 is reset by the exposure end signal from the exposure means 116. In other words, the image stabilization is stopped at the end of exposure.

Position signal of the correction optical means 111 (FIG. 12-
Output signals of the position detection elements 78p and 78y in FIG. 14) are input to the drive range detection means 113. The drive range detection means 113 outputs when the correction optical means is within a constant drive range (variable according to the signal from the zoom position detection means 118; narrows the constant drive range when the focal length is long) and outputs it to the image stabilization stop determination means 119. To do.

FIG. 3 is a detailed view of the drive range detecting means 113. The correction optical means position detection output 141 is inputted to the inverting terminal and non-inverting terminal of each of the two comparing circuits 127a and 127b. The comparison reference value of the comparison circuit 127a is an amplification circuit 125 (amplification ratio is small in zoom tele) 125 for variable amplification ratio of the reference signal 124 by zooming (amplification ratio is, for example, switching based on the zoom signal or known resistance change using Cds). ), And the comparison reference value of the comparison circuit 127b is input by inverting the output of the amplification circuit 125 by the inverting circuit 126. The outputs of the comparison circuits 127a and 127b are input to the AND gate 129 via the inverters 128a and 128b, respectively, and one of the comparison circuits 127a and 127b outputs when the position detection signal is out of a certain range. When the signal is within a certain range, neither is output. Therefore, the inverters 128a and 12a
8b outputs both of them, and an output is generated in the AND gate 129.

The image stabilization stop judgment means 119 resets the image stabilization continuation means 117 (that is, stops the image stabilization) when there is no input signal from the image stabilization determination means 112 and the correction optical means is within the constant drive range. .

The image stabilization display means 120 is the image stabilization determination means 11.
It is displayed when there is an output of 2, that is, when it is better to perform image stabilization. The image stabilization recording unit 122 indicates that the image stabilization was performed by the signal input of the image stabilization continuation unit 117, the data pack of the camera,
Alternatively, record on a film or the like.

Next, the operation of the above configuration will be described. In FIGS. 4 and 5, the broken line 21 is the waveform of camera shake,
The solid line 22 is the output (hand shake angular velocity) of the angular velocity sensor 11 at that time. Then, when SW1 is turned on, the angular velocity sensor 11
When the output exceeds the threshold value, the shake amount determination means 13 outputs, and when it is determined that the image stabilization is necessary based on the shutter speed and the focal length information at that time, the image stabilization determination means 112.
And the image stabilization display means 120 displays that the image stabilization is to be performed. Then, the image stabilization starting means 115 outputs by operating the SW2, and the image stabilization is started via the image stabilization continuation means 117.

Here, when the period in which the angular velocity sensor output is equal to or less than the threshold value continues for t ₂ or more after SW2, the image stabilization determination unit 112 stops the output, but the t ₁ section of the image stabilization continuation unit 117. Vibration control continues during the period. This is because if the image stabilization is stopped with the image stabilization OFF 1 in FIG. 5, the correction optical means is returned to the neutral position at that point, and this shift amount δ is recorded in the image as a blur. . However, when the correction optical means is within the constant drive range (stop range in FIG. 5), the image stabilization stop judgment means 119 outputs (correction optical means is within the constant drive range and the vibration prevention judgment means does not output).
Then, the image stabilization continuation means 117 is reset to stop the image stabilization.
This is because the correction optical means is in the vicinity of the neutral position, and therefore the neutral return shift amount δ of the correction optical means even if the image stabilization is off (anti-vibration off 2).
This is because the vibration is slight and does not pose a problem as blurring, and the image stabilization is turned off early from the viewpoint of power saving.

Next, as shown in FIG. 6, a case will be described in which the output 22 of the angular velocity sensor does not exceed the threshold value before the SW2 is turned on, so that the image stabilization is required during the exposure. In this case as well, the image stabilization is turned on during exposure, but when the image stabilization is started, the correction optical means rapidly rises from the zero position to the target position, and when image stabilization is started, as shown in A of FIG. This deviation is large and is recorded on the image plane as a two-line blur. However, the image stabilization input switching determination means 15 connects the switch 16a to the terminal 16c for the t ₁ ′ period when SW2 is on and the output of the image stabilization determination means 112 is off (period C in FIG. 6). Therefore, when the image stabilization is turned on during exposure, the correction optical means starts driving continuously from its center as shown by the solid line 21 'in FIG.
2-line blurring due to

As described above, in the apparatus of the present embodiment, the camera automatically judges whether the image stabilization is on or off, so that the photographer is not burdened, and when the image stabilization is turned off during exposure, It also avoids potential problems when turning on.

It is to be noted that, as shown in FIG. 4, the output of the shake amount determination means 13 is continued by the timer 1 (18) for t ₂ hours or more because the shake angular velocity output is alternating,
This is because if the timer 1 (18) is not provided, the necessity of vibration proof is switched rapidly. In the example of FIG. 1, the system configuration is such that the image stabilization is performed from the time of SW2, but it goes without saying that the image stabilization may be performed at the time of SW1 and when the image stabilization determination unit 112 outputs.

<Embodiment 2> FIG. 8 is a second embodiment of the present invention. Since the blocks having the same functions as those in FIG. 1 are indicated by the same reference numerals as those in FIG. 1, the same blocks as those in FIG. 1 will be described. Omit it. The example is different from the embodiment shown in FIG. 1 in that when the camera shake is too large, the image stabilization is not performed and the image stabilization is displayed and recorded.

Therefore, in the configuration of FIG. 8, the output of the angular velocity sensor 11 is also input to the blur amount discriminating means 2 (13 '), and the reference value to be compared by the blur amount discriminating means 2 (13'). (Const2) is larger than the reference value of the blur amount discriminating means 1 (13), and the blur amount discriminating means 2 outputs when a blur angular velocity equal to or higher than the reference value occurs. That is, it outputs only when there is a large blur. Then, the output of the timer 2 (1
8 ') and continue the output for t ₂ period. The output is sent to the image stabilization determination means 2 (112 '), and if it is determined that the image blur cannot be corrected even if image stabilization is performed based on the lens focal length and shutter speed at that time, the image stabilization determination means 2
(112 ') outputs and inputs to the image stabilization impossible display means 41 to display the image stabilization impossible.

At this time, the image stabilization judgment means 1 (112) is also output, and the image stabilization display means 120 is displayed in order to perform image stabilization, and the correction optical means activation SW 121 is turned on (switch piece 121a is switched to terminal 121b. Trying to connect). However, when the image stabilization judgment means 2 (112 ') outputs, the switch piece 42a of the display switching means 42 turns into the terminal 42b.
The image stabilization display means 120 does not display, because the connection with is disconnected.
Further, the image stabilization judgment means 2 (112 ') also inputs to the image stabilization stop means 44, and the input causes the switch piece 44a to move to the terminal 44.
When the connection with b is cut off, the correction optical means activation SW 121 is no longer operated by the image stabilization continuation means 117. That is, no vibration isolation is performed. The output of the image stabilization determination unit 2 (112 ') is also input to the image stabilization disable recording unit 43, and the fact that the image stabilization is disabled is recorded in a data pack or a film.

If the image stabilization is performed when a large shake occurs, not only the image stabilization is not performed because the driving range of the correction optical unit is limited, but also the correction optical unit operates at high speed. Since it is driven with a large amplitude, the life of the power supply becomes extremely short. Therefore, in this embodiment, the image stabilization is not performed at the time of a large shake.

As in this example, since the image stabilization cannot be displayed when there is a large shake, the camera can be image-stabilized by re-holding the camera or performing an operation such as shortening the focal length. If it is returned to, the camera will perform self-vibration again, and after that, you can take pictures without image blur.

<Embodiment 3> FIG. 9 shows a third embodiment of the present invention, which is different from the embodiment of FIG. There are three points that can stop vibration isolation arbitrarily.

In FIG. 9, the blur amount detecting means 51 produces an output obtained by converting the output of the angular velocity sensor 11 into an absolute value and performing smoothing, and outputs the signal as the blur amount determining means 1 and 2 (52a, 5a, 5a, 5a).
Enter in 2b). The blur amount determination means 1 and 2 are respectively the first from the shutter speed information and the lens focal length information from the exposure preparation means 114 and the zoom position detection means 118.
And the second reference value are determined. Here, the first reference value is a value that does not cause image blur even if the image stabilization is not performed when the blur is less than the reference value, and the second reference value is the blur when the blur is greater than the reference value. Is a value that cannot be corrected. When the output of the blur amount detecting means 51 is equal to or larger than the first reference value, image stabilization is performed as in the first embodiment, and when the output is equal to or larger than the second reference value, the blur amount determining means 2 is similar to the second embodiment. (52b) is input to the image stabilization unit 44, and the correction optical unit activation SW 121 is turned off. That is, no vibration isolation is performed. Further, the output of the shake amount determination means 2 (52b) is input to the image stabilization enabled display means 53 via the NAND gate 55. Therefore, when the shake amount determination means 2 (52b) is not output, the image stabilization enabled display is displayed. Since it is displayed, the photographer can concentrate on shooting with peace of mind.

The image stabilization forced-off means 54 is a means for turning off the switch of the image stabilization stop means 44 by the operation of the photographer.
Anti-vibration is not performed when output from.

For example, when taking a picture by panning the camera, such as a panning shot, the anti-vibration forced-off means 54 is used. still,
The operation member of the anti-vibration forced-off means 54 is usually hidden by a lid or the like so that the photographer does not feel the psychological burden due to the large number of operation members.

<Embodiment 4> FIG. 10 shows a fourth embodiment of the present invention, which is different from the second and third embodiments in that the output of the angular velocity sensor 11 is not used for the image stabilization judgment and the image stabilization preparation means is used. 114
In addition, the image stabilization is determined based on the information (shutter speed, lens focal length) from the exposure unit 116.
For example, at a shutter speed of 1/60, a focal length of 300 mm
At that time, the product is 5, which is larger than the first reference output 1, so the image stabilization determination unit 1 (62a) outputs and performs image stabilization,
Since it is smaller than the second reference output 10, the image stabilization determination unit 2 does not output, and the image stabilization is not stopped. If the shutter speed is 1/10 and the focal length is 300, the product is 3
Since it is 0, the image stabilization determination means 2 (62b) outputs it, determines that it is a large shake and does not perform image stabilization, and displays the image stabilization enablement 5
Do not display 3.

With such a configuration, the image stabilization judgment cannot be made as accurately as in each of the above-described embodiments (depending on the amount of blur of the photographer), but the system can be constructed more easily. The anti-vibration forced-on means 61 is means for enabling anti-vibration by the photographer's operation even when the anti-vibration display means 120 is not displayed and the fear of blurring is small. It is used when asking the photographer of (unknown blur) to shoot.

[0075]

As described above, the camera shake control apparatus of the present invention is configured to automatically turn on the vibration control when the image deterioration due to camera shake is likely to occur. Avoiding the hassle of
It is possible to realize an anti-vibration camera that can be used even by a photographer who cannot determine whether it is off or not, and to provide an anti-vibration function to cameras such as compact cameras.

Further, even when the image stabilization is turned on or off during the exposure, the driving position of the correction optical means at that time is changed, or the image stabilization is continued until the driving position is within a certain range. It is possible to avoid the blurring picture like.

Further, since means for displaying that image stabilization is impossible because of a large blur and means for displaying that image stabilization is possible because of not a large blur are provided, the photographer can see these displays. Now I can concentrate on shooting with peace of mind.

[Brief description of drawings]

FIG. 1 is a block diagram of a camera shake stabilization control device according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating an image stabilization determination unit 112 in the configuration shown in FIG.
6 is a flowchart showing an example of a control operation performed in the flow chart.

FIG. 3 is a view showing the drive range detecting means 1 in the configuration shown in FIG.
The figure which showed the specific example of 13 circuits.

FIG. 4 is a diagram showing a relationship between an output signal of a shake angular velocity sensor, a vibration waveform of a camera shake, and two signals that are interlocked with an operation of a release switch of a camera.

FIG. 5 is a diagram showing a relationship between vibration of a camera shake, a signal of an angular velocity sensor, and a driving position of a correction lens at the time of exposure of a camera, and a deviation of a stop position of the correction lens when the image stabilization operation is not performed. The figure shown.

FIG. 6 is a diagram for explaining that image stabilization is required during exposure of the camera.

FIG. 7 is a diagram for explaining the operation of the correction lens when the image stabilization operation is started during exposure of the camera.

FIG. 8 is a block diagram of a camera shake stabilization control device according to a second embodiment of the present invention.

FIG. 9 is a block diagram of a camera shake stabilization control device according to a third embodiment of the present invention.

FIG. 10 is a block diagram of a camera shake compensation control device according to a fourth embodiment of the present invention.

FIG. 11 is a conceptual diagram of a prior art camera image stabilization control device by the applicant.

FIG. 12 is a diagram showing a specific example of a camera shake prevention control device according to the prior art of the present applicant.

13 is an exploded perspective view showing details of a mechanical structure portion of the configuration shown in FIG.

FIG. 14 is a diagram showing a specific circuit example of the electrical configuration of the configuration shown in FIG.

[Explanation of symbols]

11 ... Angular velocity sensor 12 ... Sensor output calculation circuit 13, 13 '... Shake amount determination means 14 ... Target position setting means 15 ... Anti-vibration input switching determination means 16 ... Sensor output switching means 17 ... Release means 18, 18' ... Timer 19 ... image stabilization sensitivity changing means 41 ... image stabilization disable display means 42 ... display switching means 43 ... image stabilization disable recording means 44 ... image stabilization stop means 51 ... shake amount detection means 52a ... shake amount determination means 52b ... shake amount determination Means 2 53 ... Anti-vibration display means 54 ... Anti-vibration forced-off means 61 ... Anti-vibration forced-on means 62a ... Anti-vibration determination means 1 62b ... Anti-vibration determination means 2 80, 71 ... Correction lens 81 ... Correction lens holding frame 82 ... Outer cylinder 84 ... Inner cylinder 83p, 83y ...
Angular displacement detection means 85 ... Correction optical means 86p, 86y ...
Coil 87p, 87y ... Position detecting means 72 ... Correction lens support frame 76p, 76y ... Projector element 78p, 78y ...
Position detecting elements 79p, 79y ... Coil 91, 92 ... Magnetic pole unit 93 ... Locking means 94 ... Correction optical means drive control circuit 110 ... Driving means 111 ... Correction optical means 112, 112 '... Image stabilization judgment means 113 ... Driving range detection Means 114 ... Exposure preparation means 115 ... Anti-vibration activation means 116 ... Exposure means 117 ... Anti-vibration continuation means 118 ... Zoom position detection means 119 ... Anti-vibration stop determination means 120 ... Anti-vibration display means 121 ... Correction optical means activation switch (SW) ) 122 ... Anti-vibration recording means 123 ... Switching fixing means 125 ... Amplifying circuit 126 ... Inversion circuit 127a, 127b ... Comparison circuit 128a, 128
b ... NAND gate 129 ... AND gates 710 ... lens barrel _{712p 1 ~712p 3, 712y 1 ~712y} 3 ... yoke 713p, 713y ... magnet 716 ... flexible printed circuit board 719 ... magnetic armature 720 ... spring

Claims (20)

[Claims] 1. A vibration detecting means for detecting a camera shake, a correction optical means for correcting an image shake of the camera according to an output of the vibration detecting means, and a control means for controlling the correction optical means. In the camera shake compensation control device, the control means has a function of performing a shake compensation activation of the correction optical means according to an output of the vibration detection means. 2. A vibration detecting means for detecting camera shake, a correction optical means for correcting the image shake of the camera according to the output of the vibration detecting means, and a control means for controlling the correction optical means. In the camera image stabilization control device, the control means has a function of activating the image stabilization operation of the correction optical means in accordance with the photographing information of the camera. 3. A vibration detecting means for detecting camera shake, a correction optical means for correcting the image shake of the camera according to the output of the vibration detecting means, and a control means for controlling the correction optical means. In the camera image stabilization control device, the control means has a function of activating the image stabilization operation of the correction optical means according to the output of the vibration detection means and the shooting information of the camera. Anti-vibration control device. 4. The camera image stabilization control device according to claim 2, wherein the photographing information is lens focal length information of the camera. 5. The camera image stabilization control device according to claim 2, wherein the shooting information is shooting shutter speed information of the camera. 6. The camera image stabilization control apparatus according to claim 2, wherein the shooting information is combination information of a lens focal length of the camera and a shooting shutter speed. 7. The control means has a function of activating the correction optical means when a first switch for controlling exposure of a film of a camera is operated. , 2, or 3 camera image stabilization control device. 8. A vibration detection means for detecting camera shake, correction optical means for correcting the image shake of the camera according to the output of the vibration detection means, and control means for controlling the correction optical means. In the camera anti-shake control device, the control means has an anti-shake activation function for activating the anti-shake operation by the correction optical means in accordance with at least one of the output of the vibration detection means and the photographing information of the camera. Even if it is predicted that the image deterioration due to the blur will decrease from the output of the vibration detecting means, the image stabilization function for continuing the image stabilization operation during the exposure of the camera is provided. A camera anti-shake control device characterized by the above. 9. A vibration detection means for detecting camera shake, correction optical means for correcting image shake of the camera according to the output of the vibration detection means, and control means for controlling the correction optical means. In the camera anti-shake control device, the control means has an anti-shake activation function for activating the anti-shake operation by the correction optical means in accordance with at least one of the output of the vibration detection means and the photographing information of the camera. Even if it is predicted that the image deterioration due to the blur will decrease from the output of the vibration detecting means, the anti-vibration continuation function for continuing the anti-vibration operation during the exposure of the camera, and the during-exposure of the camera. Even if the correction optical means is within a constant drive range, the camera shake prevention control device has a function of stopping the shake prevention operation. 10. The camera shake compensation control device according to claim 9, wherein the constant drive range is variable depending on a lens focal length of the camera. 11. The control means has a function of not performing image stabilization when it is predicted that the image stabilization cannot be performed by the output of the vibration detection means. , 2, or 3 camera image stabilization control device. 12. The control means has a function of starting the image stabilization operation or displaying on the display means of the camera that the image stabilization operation is in progress. Alternatively, the camera image stabilization control device of item 3. 13. The image stabilization control apparatus according to claim 11, wherein the control means has a function of displaying on the display means of the camera that the image stabilization is impossible. 14. The control means continuously starts driving the correction optical means from a stop point immediately before the start of the image stabilization operation of the correction optical means when the image stabilization is started during exposure of the camera. The camera image stabilization control device according to claim 1 or 2. 15. The camera according to claim 1, further comprising anti-vibration force switch means for forcibly performing anti-vibration operation regardless of the output of the vibration detection means and the photographing information of the camera. Anti-vibration control device. 16. The camera anti-shake control device according to claim 1, further comprising anti-shake forced stop switch means for forcibly stopping the anti-shake operation. 17. The camera vibration isolation according to claim 1 or 2, wherein the vibration detection means generates a vibration isolation command output at a desired time from when the shake angular velocity exceeds a certain value. Control device. 18. A vibration detecting means for detecting camera shake, correction optical means for correcting the image shake of the camera according to the output of the vibration detecting means, and control means for controlling the correction optical means. A camera image stabilization control device, comprising: a display device for determining whether or not image stabilization is possible based on the output of the vibration detection device and the photographing information of the camera and displaying the image. 19. A vibration detection means for detecting camera shake, correction optical means for correcting image shake of the camera according to the output of the vibration detection means, and control means for controlling the correction optical means. A camera shake compensation control device, comprising: a recording unit that records that an image was captured by performing image stabilization. 20. The camera image stabilization control apparatus according to claim 19, further comprising a recording unit that records that the image stabilization cannot be performed.