JP2010010796A - Camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent lock operation sound of a correction lens of an image blur correction device from being recorded in a moving video. <P>SOLUTION: When an IS switch is switched during moving video recording, operation speed of a mechanical lock is reduced and noise-reduction is performed. Alternatively, drive application voltage is lowered to perform noise-reduction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an imaging apparatus such as a camera that improves the accuracy of a captured image by detecting and correcting camera shake.

  With the current camera, all the important tasks for shooting such as determining exposure and focusing are automated, and it is very unlikely that people who are unskilled in camera operation will fail to shoot.

  Recently, a system for preventing camera shake applied to the camera has been studied, and there are almost no factors that cause a photographer to make a shooting mistake.

  Here, a system for preventing image blur will be briefly described.

  The camera shake at the time of shooting is normally a vibration of 1 to 12 Hz as a frequency. In order to take a photograph without image blur due to such camera shake at the time of shutter release, it is necessary to detect the camera shake due to the camera shake and displace the correction lens according to the detected value. . Therefore, in order to take a picture that does not cause image shake even if camera shake occurs, it is first necessary to accurately detect camera vibration and secondly to correct optical axis displacement due to camera shake. .

  This vibration (camera shake) is detected by means of vibration detection means for detecting angular acceleration, angular velocity, angular displacement, etc., and camera shake detection means for outputting the angular displacement by integrating the output signal of the sensor electrically or mechanically. It can be done by mounting. Then, based on this detection information, a correction optical device that decenters the photographing optical axis is driven to suppress image blur.

  Here, the outline of the image stabilization system using the shake detection means will be described with reference to FIG.

  The example of FIG. 7 is a diagram of a system that suppresses image blur caused by the camera vertical shake 81p and the camera horizontal shake 81y in the direction indicated by the arrow 81, and in the case where the image shake correction device is provided in the interchangeable lens of a single-lens reflex camera. FIG.

  In the figure, reference numeral 82 denotes a lens barrel, 83p and 83y denote shake detection means for detecting camera vertical shake vibration and camera horizontal shake vibration, respectively, and 84p and 84y indicate the respective vibration detection directions. Reference numeral 85 denotes a correction optical device (86p and 86y are coils for applying thrust to the correction optical means 85, and 87p and 87y are position detection elements for detecting the position of the correction optical device 85). The correction optical device 85 is provided with a position control loop, and is driven with the outputs of the shake detection means 83p and 83y as target values to ensure stability on the image plane 88.

  (For example, refer to Patent Document 1).

  In addition, the image shake correction apparatus described in Patent Document 1 includes a mechanism that mechanically holds the correction optical system at the correction center when the correction optical system is not driven.

  An apparatus in which such an image blur correction system is mounted on an optical device capable of recording audio or moving images such as a video camera is also disclosed.

(For example, refer to Patent Document 2).
JP-A-7-218967 JP-A-5-127241

  In Patent Document 2, when the video camera is switched to not perform the image blur correction operation when the video camera is in the recording state, the correction lens is electrically held, and when the video camera is in the non-recording state, a mechanical lock mechanism is provided. The corrector lens is fixed.

  By operating in this way, it is possible to prevent the operation sound from being recorded by operating a mechanical lock mechanism during recording.

  However, when the video camera is in the recording state, if it is switched so as not to perform the image blur correction operation, the correction lens is electrically held. Will increase.

  Therefore, an object of the present invention is to generate an operation sound due to the operation of the mechanical locking mechanism of the correction lens when image blur correction is switched from the operating state to the non-operating state or from the non-operating state to the operating state during recording. An object of the present invention is to provide a camera shake correction apparatus for a camera that is not recorded.

In order to solve the above problems, a camera, a lens, and a camera system of the present invention include:
Shake detection means for detecting shake applied to the camera;
An image blur correction drive unit that drives a lens based on a detection result of the shake detection unit and corrects an image blur due to the shake;
Locking means for fixing the lens to the center of the optical axis when not operating image blur correction, or releasing the fixing of the lens when operating
Recording mode selection means for selecting a mode for recording audio or video or a mode for recording still images;
An image blur correction operation selection unit that operates the image blur correction drive unit to select whether to allow or not to perform the image blur correction by the blur, and
When the recording mode selection unit selects a mode for recording sound or moving image, and the sound or moving image is recorded, the image shake correction operation selecting unit changes the image shake correction operation from permitted to not permitted. In the case where the image is switched or is switched from non-permitted to permitted, the lock unit is operated at the first driving speed, and the image shake correction operation selection unit is configured to record the image in a state where no sound or video is recorded. It is characterized in that it has a lock operation control means for operating the lock means at a second drive speed when the shake correction operation can be switched from permission to disapproval or when it is switched from disapproval to permission.

In order to solve the above problems, the camera, lens, and camera system of the present invention include:
Shake detection means for detecting shake applied to the camera;
An image blur correction drive unit that drives a lens based on a detection result of the shake detection unit and corrects an image blur due to the shake;
Locking means for fixing the lens to the center of the optical axis when not operating image blur correction, or releasing the fixing of the lens when operating
Recording mode selection means for selecting a mode for recording audio or video or a mode for recording still images;
An image blur correction operation selection unit that operates the image blur correction drive unit to select whether to allow or not to perform the image blur correction by the blur, and
When the recording mode selection unit selects a mode for recording sound or moving image, and the sound or moving image is recorded, the image shake correction operation selecting unit changes the image shake correction operation from permitted to not permitted. In the case where it is switched or when it is switched from non-permission to permission, the voltage applied to the actuator for driving the lock means is set to the first voltage, and in the state where no sound or video is recorded, When the image blur correction operation selection unit can switch the image blur correction operation from permitted to not permitted, or when switched from not permitted to permitted, the voltage applied to the actuator for driving the lock unit is set to the second It is characterized by having a lock operation control means which is set to a voltage of and operated.

In order to solve the above problems, the camera, lens, and camera system of the present invention include:
Shake detection means for detecting shake applied to the camera;
An image blur correction drive unit that drives a lens based on a detection result of the shake detection unit and corrects an image blur due to the shake;
Locking means for fixing the lens to the center of the optical axis when not operating image blur correction, or releasing the fixing of the lens when operating
Recording mode selection means for selecting a mode for recording audio or video or a mode for recording still images;
An image blur correction operation selection unit that operates the image blur correction drive unit to select whether to allow or not to perform the image blur correction by the blur, and
When the recording mode selection means selects the mode for recording audio or moving images, the image blur correction operation selection means can switch the image blur correction operation from permitted to not permitted, or permitted from not permitted. In the state where the lock unit is operated at the first driving speed and the mode for recording a still image is selected, the image blur correction operation selection unit allows the image blur correction operation to be permitted. It is characterized by having a lock operation control means for operating the lock means at a second drive speed when it is switched to non-permission or when it is switched from non-permission to permission.

In order to solve the above problems, the camera, lens, and camera system of the present invention include:
Shake detection means for detecting shake applied to the camera;
An image blur correction drive unit that drives a lens based on a detection result of the shake detection unit and corrects an image blur due to the shake;
Locking means for fixing the lens to the center of the optical axis when not operating image blur correction, or releasing the fixing of the lens when operating
Recording mode selection means for selecting a mode for recording audio or video or a mode for recording still images;
An image blur correction operation selection unit that operates the image blur correction drive unit to select whether to allow or not to perform the image blur correction by the blur, and
When the recording mode selection means selects the mode for recording audio or moving images, the image blur correction operation selection means can switch the image blur correction operation from permitted to not permitted, or permitted from not permitted. When the mode is switched, the image blur correction operation selecting means is set in a state in which the voltage applied to the actuator for driving the locking means is set to the first voltage and the mode for recording a still image is selected. Thus, when the image blur correction operation is switched from permitted to not permitted, or when switched from not permitted to permitted, the voltage applied to the actuator for driving the lock means is set to the second voltage. It has a lock operation control means to operate.

  According to the present invention, the mechanical locking mechanism of the correction lens is operated at a low speed when image shake correction is switched from the operating state to the non-operating state or from the non-operating state to the operating state during audio recording or moving image recording. .

  By operating in this manner, it is possible to prevent the operation sound of the lock mechanism from being recorded, and it is possible to prevent wasteful power consumption in a non-operation state of image blur correction.

  Next, details of the present invention will be described in accordance with the description of the embodiments.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 shows a configuration of a camera system including a camera body 201 and an interchangeable lens 202. The photographing light flux from the subject passes through the photographing optical system of the interchangeable lens 202 and forms an image on the image pickup unit (CCD or CMOS) 203 surface as a photographing optical image. The captured optical image is photoelectrically converted by the imaging unit 203 into an imaging signal.

  A timing generator 204 controls the accumulation operation, readout operation, reset operation, and the like of the imaging unit 203. Reference numeral 205 denotes a CDS circuit (double correlation sampling circuit) that reduces the accumulated charge noise of the imaging unit 203 and a gain control circuit that amplifies the imaging signal. Reference numeral 206 denotes an A / D converter that converts the amplified imaging signal from analog to digital image data.

  A video signal processing circuit 207 performs filter processing, color conversion processing, gamma processing, and the like on the image data digitized by the A / D converter 206. The image signal processed by the video signal processing circuit 207 is displayed on the LCD 208 or recorded on a removable memory card 209.

  The operation unit 210 is a switch for performing a camera main switch, setting of a moving image / still image shooting mode, recording of a moving image, and still image shooting.

  The camera system control MPU 211 controls the above operation and communicates with the lens MPU 213 on the interchangeable lens 202 side via the interface circuit 212.

  In this communication, a focus drive command is transmitted to the interchangeable lens 202, and data such as a moving image / still image shooting mode state, a recording state, an operation state during shooting, and the like are transmitted and received.

  In the interchangeable lens 202, a focus lens 214, an image blur correction lens 215, and an aperture 216 are disposed as a part of the photographing optical system.

  The focus lens 214 is driven via a focus control circuit 217 and a focus lens driving motor 218 by a control signal from the lens MPU 213. The focus control circuit 217 includes, in addition to the focus lens driving circuit, a focus encoder that outputs a zone pattern signal and a pulse signal corresponding to the movement of the focus lens.

  The image blur correction lens 215 is driven via an image blur correction control circuit 219 and a linear motor 220. Image blur correction is performed as follows.

  That is, a shake signal of the angular velocity sensor 221 that detects rotational shake is input to the lens MPU 213.

  The lens MPU 213 calculates a correction lens drive target signal, and sends a drive signal corresponding to the difference between the correction lens drive target signal and the correction lens position signal output from the correction lens position detection unit 222 to the image blur correction control circuit 219. Output.

  Image blur correction is performed by feeding back the correction lens position signal output from the correction lens position detection unit 222 to the image blur correction control circuit 219 in this way.

  When image blur correction is not performed, there is a lock mechanism that mechanically locks the correction lens, which is driven via a lock control circuit 223 and a lock motor 224 by a control signal from the lens MPU 213.

  The diaphragm 216 is driven via a diaphragm control circuit 225 and a stepping motor 226 by a control signal from the lens MPU 213.

  A switch 227 is an image blur correction ON / OFF selection switch.

  Next, the mechanical configuration of the image blur correction unit of the present invention will be described.

  First, each part is outlined. FIG. 2 is an exploded perspective view of the shake correction unit of the present invention.

  1 is a base member made of synthetic resin, 2 is a first yoke member made of steel plate with high magnetic permeability, 3 is a permanent magnet, and four rectangular permanent magnets 3a-1, 3b-1, 3a -2 and 3b-2.

  Reference numeral 4 denotes a guide member formed by bending a metal wire, and has a first guide portion 4a and a second guide portion 4b.

  5 is a lens holding frame that is formed of a synthetic resin material and holds the image blur correction lens 14, 6a and 6b are coils that are formed of conductive wires, and 7 is a second yoke member that is formed of a steel plate having high magnetic permeability. It is.

  Reference numeral 8 denotes an insulating plate made of a synthetic resin having high electric insulation, and 9 denotes an electric circuit board on which electric parts of an image blur correction control circuit are mainly mounted.

  A lock ring 10 is a lock mechanism that is made of synthetic resin and mechanically locks the movement of the lens holding frame 5 in the correction operation direction.

  Reference numeral 11 denotes an actuator for driving the lock ring 10, which employs a stepping motor (pulse drive motor).

  12 is a photo interrupter for detecting the position of the lock ring 10, and 13 is a flexible printed circuit board.

  Reference numerals 15a and 15b denote light emitting elements, and reference numerals 16a and 16b denote light receiving elements that receive light emitted from the light emitting element 15, and detect the position of the correction lens. Reference numerals 17 to 20 denote fastening members, and reference numerals 21a to 21c denote support shafts formed of metal wires.

  Next, the operation on the interchangeable lens 202 side will be described according to the flowcharts shown in FIGS.

  When the lens is attached to the camera, serial communication is performed from the camera to the lens, and the operation starts from step 300 in FIG.

  (Step 300) Initial setting for lens control and image blur correction control is performed.

  (Step 301) The state of a switch (not shown) and the position of a focus are detected. Examples of the switches include a switch for switching between auto focus and manual focus, and an ON / OFF switch for an image blur correction function.

  (Step 302) The focus is controlled according to the focus drive command communication from the camera. Since the target drive amount of the focus lens is transmitted, the number of pulses of the focus encoder in the focus control circuit 217 is detected, and focus drive control is performed so as to drive the target number of pulses.

  (Step 303) It is determined whether or not the camera is in the moving image shooting mode. If it is in the moving image shooting mode, the process proceeds to step 304; otherwise, the process proceeds to step 313.

  (Step 304) ON / OFF determination of the image blur correction selection switch 227 is performed. If it is ON, the process proceeds to step 305. If it is OFF, the process proceeds to step 309.

  (Step 305) It is determined whether or not the image blur correction operation is being performed, that is, whether or not the flag ISDRV is “1”. If it is “1”, there is no need to change the operating state, so the routine proceeds to step 322. If “0”, the process proceeds to Step 306.

  (Step 306) Since the photographer has selected to switch the image shake correction from the non-operating state to the operating state in the moving image photographing mode, the setting for driving the lock ring 10 at a low speed is performed.

  (Step 307) The lock actuator 11 is driven at the speed set in step 306 to release the locked state. At this time, since the lock actuator 11 is driven at a low speed, the operation sound is low and the operation sound is not recorded at the time of moving image shooting.

  (Step 308) Since the image blur correction operation is in progress, “1” is set to the flag ISDRV.

  (Step 309) It is determined whether or not an image blur correction operation is being performed, that is, whether or not the flag ISDRV is “1”. If it is “0”, there is no need to change the operating state, so the routine proceeds to step 322. If “1”, the process proceeds to step 310.

  (Step 310) Since the photographer has selected to change the image shake correction from the operating state to the non-operating state in the moving image shooting mode, the setting for driving the lock ring 10 at a low speed is performed.

  (Step 311) The lock actuator 11 is driven at the speed set in Step 310 to enter the locked state. At this time, since the lock actuator 11 is driven at a low speed, the operation sound is low and the operation sound is not recorded at the time of moving image shooting.

  (Step 312) Since the image blur correction has become inoperative, “0” is set to the flag ISDRV.

  The above is the operation in the moving image shooting mode.

  The operation when not in the moving image shooting mode will be described below.

  (Step 313) ON / OFF determination of the image blur correction selection switch 227 is performed. If it is ON, the process proceeds to step 314, and if it is OFF, the process proceeds to step 318.

  (Step 314) It is determined whether or not the image blur correction operation is being performed, that is, whether or not the flag ISDRV is “1”. If it is “1”, there is no need to change the operating state, so the routine proceeds to step 322. If “0”, the process proceeds to step 315.

  (Step 315) Since the photographer has selected not to move to the moving image shooting mode but to switch the image shake correction from the non-operating state to the operating state, the setting for driving the lock ring 10 at high speed is performed.

  (Step 316) The lock actuator 11 is driven at the speed set in Step 315 to release the lock state. At this time, since the lock actuator 11 is driven at a high speed, the operation sound is loud, but since it is not in the moving image shooting mode, the operation sound is not recorded.

  (Step 317) Since the image blur correction operation is in progress, “1” is set to the flag ISDRV.

  (Step 318) It is determined whether or not the image blur correction operation is being performed, that is, whether or not the flag ISDRV is “1”. If it is “0”, there is no need to change the operating state, so the routine proceeds to step 322. If “1”, the process proceeds to step 319.

  (Step 319) Since the photographer has selected not to move to the moving image shooting mode but to switch the image blur correction from the operating state to the non-operating state, settings are made to drive the lock ring 10 at high speed.

  (Step 320) The lock actuator 11 is driven at the speed set in Step 319 to be in a locked state. At this time, since the lock actuator 11 is driven at a high speed, the operation sound is loud, but since it is not in the moving image shooting mode, the operation sound is not recorded.

  (Step 321) Since image blur correction has become inoperative, “0” is set to the flag ISDRV.

  (Step 322) It is determined whether or not an instruction for stopping all driving (stopping all driving of the actuators in the lens) is received from the camera. If no operation is performed on the camera side, the entire drive stop command is transmitted from the camera after a while.

  (Step 323) All drive stop control is performed. Here, all actuator driving is stopped, and the microcomputer is put into a sleep (stopped) state. Power supply to the image shake correction apparatus is also stopped. Thereafter, when any operation is performed on the camera side, the camera sends a communication to the lens to cancel the sleep state.

  During these operations, if there is a request for serial communication interruption or image blur correction control interruption due to communication from the camera, such interruption processing is performed.

  The serial communication interrupt process decodes communication data and performs lens processing such as aperture driving and focus lens driving according to the decoding result. The moving image shooting mode or the still image shooting mode can be determined by decoding the communication data.

  The image blur correction interrupt is a timer interrupt that is generated at regular intervals, and performs pitch direction (vertical direction) control and yaw direction (horizontal direction) image blur correction control.

  Next, the image blur correction interrupt operation will be described with reference to FIG.

  If an image blur correction interrupt occurs during the main operation of the lens, the lens MPU 213 starts image blur correction control from step 400 in FIG.

  (Step 400) The signal of the angular velocity sensor 221 is A / D converted. The A / D conversion result is stored in a RAM area (not shown) set by VAD_DAT in the lens MPU 213.

  (Step 401) It is determined whether or not the image blur correction is unlocked, that is, whether or not the flag ISDRV is “1”. If “0”, the image blur correction interruption ends. If “1”, the process proceeds to step 402.

  (Step 402) A high-pass filter operation is performed. In addition, the time constant is switched for a predetermined time from the start of the image blur correction to reduce the rising image shake.

  (Step 403) An integration calculation is performed with the high-pass filter calculation result as an input. The result is stored in a RAM area (not shown) set by DEG_DAT in the lens MPU 213. DEG_DAT is a deflection angle displacement signal.

  (Step 404) Since the amount of eccentricity (sensitivity) of the image blur correction lens 215 for correcting the angular displacement DEG_DAT varies depending on the focus position, the adjustment is performed. Specifically, the focus position is divided into several zones, and the average optical image stabilization sensitivity (deg / mm) in each zone is read from the table data and converted into correction lens drive data. The calculation result is stored in a RAM area (not shown) set by SFTDRV in the lens MPU 213.

  (Step 405) The displacement signal of the image blur correction lens 215 is A / D converted, and the A / D result is stored in the RAM area set by SFT_AD in the lens MPU 213.

  (Step 406) A feedback calculation (SFTDRV-SFTPST) is performed. The calculation result is stored in a RAM area set by SFT_DT in the lens MPU 213.

  (Step 407) Multiply the loop gain LPG_DT by the calculation result SFT_DT of Step 406. The calculation result is stored in a RAM area set by SFT_PWM in the lens MPU 213.

  (Step 408) In order to obtain a stable control system, a phase compensation calculation is performed.

  (Step 409) The calculation result of step 408 is output as PWM to the port of the lens MPU 213, and the image blur correction interruption ends. The output is input to a driver circuit in the IS control circuit 219, and the image blur correction lens 215 is driven by the linear motor 220 to correct the image blur.

  As described above, when the lens MPU 213 is set to the moving image shooting mode in step 303 to step 308 in FIG. 3 and image blur correction operation permission is selected while image blur correction is stopped, the lens MPU 213 is unlocked at a low speed. .

  In step 309 to step 312 in FIG. 3, when the moving image shooting mode is set and the image blur correction operation stop is selected during the image blur correction operation, the lock operation is performed at a low speed.

  Then, in step 313 to step 317 in FIG. 3, when the image blur correction operation permission is selected not in the moving image shooting mode but during the image blur correction stop, the unlocking operation is performed at high speed.

  In step 318 to step 321 in FIG. 3, when the image blur correction stop is selected during the image blur correction operation instead of the moving image shooting mode, the lock release operation is performed at high speed.

  By operating in this manner, it is possible to prevent the operation sound of the lock mechanism from being recorded, and it is possible to prevent wasteful power consumption in a non-operation state of image blur correction.

  Next, a second embodiment of the present invention will be described.

  FIG. 5 is an exploded perspective view of the image blur correction unit in the second embodiment of the present invention.

  The rear protruding ear 71a of the base plate 71 is fitted into a lens barrel (not shown), and a known lens barrel or the like is screwed into the hole 71b and fixed to the lens barrel.

  The second yoke 72, which is a magnetic body, is screwed to the hole 71c of the base plate 71 with a screw passing through the hole 72a, and a permanent magnet 73 (shift magnet) such as a neodymium magnet is magnetically attached to the second yoke 72. Is adsorbed on the surface.

  Coils 76p and 76y (shift coils) are fitted into a support frame 75 to which the correction lens 74 is fixed by a C ring or the like.

  The first yoke 712 is fitted by the positioning hole 712 a and the pin of the ground plate 71, and the first yoke 712 is magnetically coupled to the ground plate 71 by the magnetic force of the permanent magnet 73 on the receiving surface.

  An L-shaped shaft 711 is inserted into the bearing portion 75 d of the support frame 75, and the other end of the shaft 711 is inserted into a bearing portion 71 d formed on the base plate 71.

  Further, the shaft 711 supports the support frame 75 so as to be slidable only in the directions of arrows 713p and 713y with respect to the base plate 71, whereby relative rotation of the support frame 75 with respect to the base plate 71 around the optical axis ( Rolling).

  The coils 76p and 76y are located in a closed magnetic path formed by the permanent magnet 73, the first yoke 712, and the second yoke 72. The support frame 75 is driven in the direction of arrow 713p by passing a current through the coil 76p, and the support frame 75 is driven in the direction of arrow 713y by flowing a current through the coil 76y.

  When the support frame 75 moves in a plane perpendicular to the optical axis, the incident positions of the light emitted from the light projecting elements 77p and 77y and passing through the slits 75ap and 75ay on the position detecting elements 78p and 78y change. .

  In general, when the outputs of the position detection elements 78p and 78y are amplified by ICs 731p and 731y and the coils 76p and 76y are driven by the outputs, the support frame 75 is driven and the outputs of the position detection elements 78p and 78y change. Become.

  Here, when the drive direction (polarity) of the coils 76p and 76y is set to a direction in which the output of the position detection elements 78p and 78y becomes small (negative feedback), the output of the position detection elements 78p and 78y is driven by the drive force of the coils 76p and 76y. The support frame 75 is stable at a position where the value becomes almost zero.

  Actually, the outputs of the differential amplifiers 731 cp and 731 cy are sent to the main board (not shown) via the flexible board 716, where A / D conversion is performed and taken in the microcomputer (not shown).

  The microcomputer appropriately compares and amplifies it with a target value (hand shake angle signal), performs phase advance compensation (to make the position control more stable) by a known digital filter technique, passes through the flexible board 716 again, and returns to the IC 732 (coil 76p, 76y drive). The IC 732 drives the support frame 75 by performing known PWM (pulse width modulation) driving of the coils 76p and 76y based on the input signal.

  Further, when the correction optical apparatus is not operated, the support frame 75 needs to be fixed (locked). Three projections (not shown) are provided on the back surface of the support frame 75, and the support frame 75 is fixed by fitting the tip of the projection to the inner peripheral surface of the lock ring 719. Specifically, when a voltage is applied to the coil 720 by the magnetic circuit of the coil 720 and the lock magnet 718, the lock ring 719 rotates against the lock spring 728, the armature 724 comes into contact with the suction yoke 729, and the suction coil 730 By energizing, the armature 724 is attracted to the attracting yoke 729. Here, when the power supply to the coil 720 is stopped, the lock ring 719 tries to return to the original state by the force of the lock spring 728, but the rotation is restricted because the armature 724 is adsorbed by the adsorption coil 729, and the unlocked state Become. When returning to the locked state, by stopping energization to the adsorption coil 730, the lock ring 719 is rotated by the force of the lock spring 728, and is fitted to the protrusion of the support frame 75 and the inner peripheral surface of the lock ring 719. Become.

  When such an image blur correction unit is used, the operating sound is reduced by setting the voltage applied to the lock coil 720 to a low voltage.

  Although a flowchart is shown in FIG. 6, it is almost the same as the flowchart of FIG. Since only the point where the setting of the applied voltage to the lock coil is changed from step 324 to step 327 is different from the first embodiment, detailed description thereof is omitted.

  In step 325 of FIG. 6, the lens MPU 213 is set to the moving image shooting mode, and when image blur correction operation permission is selected while image blur correction is stopped, the lens MPU 213 performs unlocking at a low voltage.

  In step 324 in FIG. 6, when the moving image shooting mode is set and the image blur correction operation stop is selected during the image blur correction operation, the lock operation is performed at a low voltage.

  Then, in step 327 of FIG. 6, when the image blur correction operation permission is selected while the image blur correction is stopped, not the moving image shooting mode, the lock operation is performed with the normal voltage.

  In step 326 of FIG. 6, when the image blur correction stop is selected during the image blur correction operation instead of the moving image shooting mode, the lock release operation is performed with the normal voltage.

  By operating in this manner, it is possible to prevent the operation sound of the lock mechanism from being recorded, and it is possible to prevent wasteful power consumption in a non-operation state of image blur correction.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist.

  For example, in the above embodiment, the lock drive setting is changed depending on whether or not the moving image shooting mode is selected, but the setting may be changed depending on whether or not the moving image is being recorded.

  In the above embodiment, an example of the interchangeable lens system is shown, but a video camera or a compact camera may be used.

It is a block diagram which shows the structure of the camera system which concerns on one Example of this invention. FIG. 3 is an exploded perspective view of an image shake correction unit according to an embodiment of the present invention. It is a flowchart which shows the operation | movement by the side of the interchangeable lens which concerns on one Example of this invention. It is a flowchart which shows the operation | movement by the side of the interchangeable lens which concerns on one Example of this invention. FIG. 3 is an exploded perspective view of an image shake correction unit according to an embodiment of the present invention. It is a flowchart which shows the operation | movement by the side of the interchangeable lens which concerns on one Example of this invention. 1 is a block diagram illustrating an example of an image stabilization system of an image shake correction apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 201 Camera main body 202 Interchangeable lens 203 Image pick-up part 207 Image signal processing circuit 210 Operation part 211 Camera MPU
212 Interface circuit 213 Lens MPU
214 focus lens 215 image blur correction lens 219 image blur correction control circuit 220 linear motor 221 angular velocity sensor 222 correction lens position detection unit 223 lock drive control unit 224 lock drive motor 227 switch for image blur correction ON / OFF selection

Claims (4)

Shake detection means for detecting shake applied to the camera;
An image blur correction drive unit that drives a lens based on a detection result of the shake detection unit and corrects an image blur due to the shake;
Locking means for fixing the lens to the center of the optical axis when not operating image blur correction, or releasing the fixing of the lens when operating
Recording mode selection means for selecting a mode for recording audio or video or a mode for recording still images;
An image blur correction operation selection unit that operates the image blur correction drive unit to select whether to allow or not to perform the image blur correction by the blur, and
When the recording mode selection unit selects a mode for recording sound or moving image, and the sound or moving image is recorded, the image shake correction operation selecting unit changes the image shake correction operation from permitted to not permitted. In the case where the image is switched or is switched from non-permitted to permitted, the lock unit is operated at the first driving speed, and the image shake correction operation selection unit is configured to record the image in a state where no sound or video is recorded. A camera comprising: a lock operation control means for operating the lock means at a second driving speed when the shake correction operation can be switched from permission to disapproval or when it is switched from disapproval to permission. Shake detection means for detecting shake applied to the camera;
An image blur correction drive unit that drives a lens based on a detection result of the shake detection unit and corrects an image blur due to the shake;
Locking means for fixing the lens to the center of the optical axis when not operating image blur correction, or releasing the fixing of the lens when operating
Recording mode selection means for selecting a mode for recording audio or video or a mode for recording still images;
An image blur correction operation selection unit that operates the image blur correction drive unit to select whether to allow or not to perform the image blur correction by the blur, and
When the recording mode selection unit selects a mode for recording sound or moving image, and the sound or moving image is recorded, the image shake correction operation selecting unit changes the image shake correction operation from permitted to not permitted. In the case where it is switched or when it is switched from non-permission to permission, the voltage applied to the actuator for driving the lock means is set to the first voltage, and in the state where no sound or video is recorded, When the image blur correction operation selection unit can switch the image blur correction operation from permitted to not permitted, or when switched from not permitted to permitted, the voltage applied to the actuator for driving the lock unit is set to the second A camera having a lock operation control means for setting and operating the voltage. Shake detection means for detecting shake applied to the camera;
An image blur correction drive unit that drives a lens based on a detection result of the shake detection unit and corrects an image blur due to the shake;
Locking means for fixing the lens to the center of the optical axis when not operating image blur correction, or releasing the fixing of the lens when operating
Recording mode selection means for selecting a mode for recording audio or video or a mode for recording still images;
An image blur correction operation selection unit that operates the image blur correction drive unit to select whether to allow or not to perform the image blur correction by the blur, and
When the recording mode selection means selects the mode for recording audio or moving images, the image blur correction operation selection means can switch the image blur correction operation from permitted to not permitted, or permitted from not permitted. In the state where the lock unit is operated at the first driving speed and the mode for recording a still image is selected, the image blur correction operation selection unit allows the image blur correction operation to be permitted. A camera, comprising: a lock operation control means for operating the lock means at a second drive speed when it is switched to non-permitted or when switched from non-permitted to permitted. Shake detection means for detecting shake applied to the camera;
An image blur correction drive unit that drives a lens based on a detection result of the shake detection unit and corrects an image blur due to the shake;
Locking means for fixing the lens to the center of the optical axis when not operating image blur correction, or releasing the fixing of the lens when operating
Recording mode selection means for selecting a mode for recording audio or video or a mode for recording still images;
An image blur correction operation selection unit that operates the image blur correction drive unit to select whether to allow or not to perform the image blur correction by the blur, and
When the recording mode selection means selects the mode for recording audio or moving images, the image blur correction operation selection means can switch the image blur correction operation from permitted to not permitted, or permitted from not permitted. When the mode is switched, the image blur correction operation selecting means is set in a state in which the voltage applied to the actuator for driving the locking means is set to the first voltage and the mode for recording a still image is selected. Thus, when the image blur correction operation is switched from permitted to not permitted, or when switched from not permitted to permitted, the voltage applied to the actuator for driving the lock means is set to the second voltage. A camera having a lock operation control means for operating.

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