JP2008157978A - Digital camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital camera which facilitates focusing when manual focus adjustment is performed, and also has low consumption of a power supply battery. <P>SOLUTION: The digital camera has: an imaging device 211 to acquire a subject image through lenses 101 and 102; mechanical camera shake correction mechanisms 214, 215, 216 and 217 to perform camera shake correction based on output from a camera shake sensor 214; an operation detection switch 113 to detect the operation state of a distance ring for automatic focus adjustment; and a body CPU 229 for control to perform the operation of the mechanical camera shake correction mechanism (step #103) when the distance ring is operated in a state in which a release button is half-depressed (ON in a step #81). Even when the distance ring is operated and the manual focus adjustment is performed, a camera shake correction function does not act if the release button is not half-depressed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a digital camera, and more particularly to a digital camera having a manual focus adjustment mode and a camera shake correction function.

If the camera shakes due to the camera shake of the photographer, the image is affected by the camera shake and becomes an unsightly image. Therefore, various cameras having a camera shake correction device have been proposed in order to reduce the influence of camera shake. These camera shake correction devices consume a large amount of power to drive the photographing lens and drive the image pickup device, and the power source battery is heavily consumed if the camera shake correction device is always operated. Thus, for example, Patent Document 1 discloses a camera in which a camera shake correction device operates in accordance with a shooting preparation state by half-pressing a release button. Further, Patent Document 2 discloses a camera in which a camera shake correction device operates when a distance ring for manual adjustment of a photographing lens is manually operated.
Japanese Patent No. 2752073 Japanese Patent Laid-Open No. 8-114825

As described above, the image stabilization apparatus has been devised to reduce power consumption, but the power consumption reduction in manual focus adjustment has not been sufficient. That is, Patent Document 2 described above is directed to a camera capable of manual focus adjustment. However, in this camera, the camera shake correction device operates only when the photographer touches the distance ring. Even when the camera is unnecessary, there is a disadvantage that the camera shake correction operation works and the power supply battery is consumed.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a digital camera that facilitates focusing during manual focus adjustment and consumes less power.

In order to achieve the above object, a digital camera according to a first aspect of the present invention provides an image sensor that acquires a subject image via a photographing lens, and a subject image acquired by the image sensor based on the output of a camera shake sensor. Camera shake correction means for performing camera shake correction, manual focus adjustment means for adjusting the focus of the photographing lens in response to operation of the focus adjustment operation member, and the focus adjustment operation member in a state where the release button is half-pressed When the is operated, a control means for operating the camera shake correction means is provided.

According to a second aspect of the present invention, in the digital camera according to the first aspect, the control means stops the operation of the camera shake correction means when a predetermined time elapses after the focus adjustment operation member is not operated. Let
Furthermore, in the digital camera according to the third invention, in the first invention, the control means stops the operation of the camera shake correction means when the half-press operation of the release button is released.

In order to achieve the above object, a digital camera according to a fourth aspect of the present invention includes an image sensor that acquires a subject image via a photographing lens, a camera shake correction unit that removes the influence of camera shake according to the output of the camera shake sensor, Focus adjustment means for adjusting the focus of the photographing lens in accordance with the operation of the adjustment operation member, operation detection means for detecting the operation of the focus adjustment operation member, and a photographing preparation state instruction for instructing a photographing preparation state And when the operation state of the focus adjustment operation member is detected by the operation detection unit, the image stabilization state is instructed by the camera shake correction unit. Control means for removal is provided.

The digital camera according to a fifth aspect of the present invention is the digital camera according to the fourth aspect, wherein the control means has time measuring means for measuring a predetermined time after the operation of the focus adjusting operation member is stopped. After the predetermined time elapses, removal of the influence of the camera shake by the camera shake correction unit is prohibited.
Furthermore, in the digital camera according to a sixth aspect of the present invention based on the fourth aspect, the control means immediately uses the camera shake correction means when the instruction for the photographing preparation state by the photographing preparation state instruction means is stopped. It is prohibited to remove the influence of the above-mentioned camera shake.
The digital camera according to a seventh aspect of the present invention is the digital camera according to the fourth aspect, wherein the control means includes a time measuring means for measuring a predetermined time after the operation of the focus adjusting operation member is stopped. When the instruction of the shooting preparation state by the state instruction unit is stopped, it is prohibited to remove the influence of the camera shake by the camera shake correction unit after the predetermined time has elapsed by the time measuring unit.

Furthermore, the digital camera according to an eighth invention is the digital camera according to the fourth invention, wherein the camera shake correction means drives the image sensor or the photographing lens to remove the influence of camera shake and / or the camera shake correction means. This is an electronic camera shake correction unit that removes the influence of camera shake from image data based on the output of the image sensor by image processing.
Further, a digital camera according to a ninth aspect of the invention is the digital camera according to the eighth aspect of the invention, further comprising automatic focus adjustment means for automatically adjusting the focus of the photographing lens, and the control means is manually operated by the focus adjustment means. When performing the focus adjustment, the mechanical camera shake correction means is operated. On the other hand, when the automatic focus adjustment is automatically performed by the automatic focus adjustment means, the electronic camera shake correction means is operated.
Further, a digital camera according to a tenth aspect of the present invention is the digital camera according to the fourth aspect, further comprising a through image display unit that displays the image data acquired by the imaging device as a moving image, and the control unit includes the through image display unit. When the moving image is not displayed by the display unit, the camera shake correction unit is prohibited even when the photographing preparation state is instructed and the operation of the focus adjustment operation member is detected.

According to the present invention, it is possible to provide a digital camera that facilitates focusing during manual focus adjustment and consumes less power.

Hereinafter, a preferred first embodiment using a digital single-lens reflex camera to which the present invention is applied will be described with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of the digital single-lens reflex camera according to the first embodiment of the present invention, mainly an electric system. This digital camera forms a subject image formed by a photographing lens on an image sensor and displays a moving image on a display device such as a liquid crystal monitor for observing the subject image based on the output of the image sensor. It has a display function. Further, a still image can be acquired and recorded on a recording medium in accordance with a shooting instruction from the photographer. In addition, it detects camera shake applied to the camera body and moves the image sensor to cancel the camera shake. It has an anti-shake function by electronic camera shake correction obtained by image processing. It also has a dust removal function (dust reduction function) using vibration waves.

The digital single-lens reflex camera according to this embodiment includes an interchangeable lens 100 and a camera body 200. In the present embodiment, the interchangeable lens 100 and the camera body 200 are configured separately and are electrically connected by the communication contact 300, but the interchangeable lens 100 and the camera body 200 can also be configured integrally. .

Inside the interchangeable lens 100, lenses 101 and 102 for focus adjustment and focal length adjustment, and a diaphragm 103 for adjusting the aperture amount are arranged. The lenses 101 and 102 are driven by a lens driving mechanism 107, and the diaphragm 103 is connected to be driven by a diaphragm driving mechanism 109. The lens driving mechanism 107 and the aperture driving mechanism 109 are each connected to a lens CPU 111, and the lens CPU 111 is connected to the camera body 200 via a communication contact 300. The lens CPU 111 controls the inside of the interchangeable lens 100. The lens CPU 111 controls the lens driving mechanism 107 to perform automatic focusing and zoom driving, and controls the diaphragm driving mechanism 109 to perform aperture value control.

In addition, the interchangeable lens 100 has an operation member (distance ring, not shown) for performing manual focus adjustment (manual focus, MF) by a known manual operation on the outer periphery of the interchangeable lens 100. An operation detection switch 113 for detecting that the manual focus adjustment operation member has been operated by the photographer is disposed inside the interchangeable lens 100, and the detection output of the operation detection switch 113 is communicated with the lens CPU 111. It is connected to the camera body 200 through a contact 300 or the like.

In the camera body 200, a rotation between a position inclined by 45 degrees with respect to the lens optical axis in order to reflect the subject image to the observation optical system and a position jumped up to guide the subject image to the image sensor 211. A movable movable reflecting mirror 201 is provided. Above the movable reflecting mirror 201, a focusing screen 203 for forming a subject image is disposed. Above the focusing screen 203, a pentaprism 204 for reversing the subject image to the left and right is disposed. . An eyepiece lens 205 for observing the subject image is disposed on the emission side (right side in FIG. 1) of the pentaprism 204, and a photometric sensor 206 is disposed on the side of the pentaprism 204 so as not to interfere with the observation of the subject image. . The photometric sensor 206 is composed of a multi-division photometric element that divides a subject image for photometry. The output of the photometric sensor 206 is connected to the photometric processing circuit 212, and the photometric processing circuit 212 outputs a subject luminance signal corresponding to the subject luminance based on the output of the photometric sensor 206.

Near the center of the movable reflecting mirror 201 described above is a half mirror, and on the back surface of the movable reflecting mirror 201 is a sub mirror 202 for reflecting subject light transmitted through the half mirror portion to the lower part of the camera body 200. Is provided. The sub mirror 202 is rotatable with respect to the movable reflection mirror 201. When the movable reflection mirror 201 is flipped up, the sub mirror 202 is rotated to a position covering the half mirror portion, and the movable reflection mirror 201 is at the subject image observation position. Sometimes it is in an open position with respect to the movable reflecting mirror 201 as shown. The movable reflecting mirror 201 is driven by a movable mirror driving mechanism 222. A distance measuring sensor 218 is disposed below the sub mirror 202, and an output of the distance measuring sensor 218 is connected to a distance measuring circuit 219. The focus sensor 218 and the distance measuring circuit 219 can measure the amount of focus shift of the subject image formed by the lenses 101 and 102.

A focal plane type shutter 213 for controlling the exposure time is disposed behind the movable reflecting mirror 201, and this shutter 213 is driven and controlled by a shutter drive mechanism 221. An imaging element 211 is disposed behind the shutter 213 and photoelectrically converts a subject image formed by the lenses 101 and 102 into an electrical signal. As the image sensor 211, a two-dimensional image sensor such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) can be used. Between the above-described shutter 213 and the image sensor 211, a dust filter 207 constituting a dust removing mechanism and a piezoelectric element 208 fixed to the peripheral edge of the dust filter 207 are disposed. The piezoelectric element 208 is driven by a dustproof filter drive circuit 220.

Between the dust-proof filter 207 and the image sensor 211, an optical low-pass filter 209 for cutting a high-frequency component of a subject image and allowing only a low frequency to pass therethrough, and an infrared cut filter 210 for cutting an infrared light component, Is arranged. The dustproof filter 207, the piezoelectric element 208, the low-pass filter 209, the infrared cut filter 210, and the image sensor 211 constitute an image sensor unit 224. The image sensor unit 224 is designed to prevent dust and the like from entering. The gap is reduced. The image sensor unit 224 can be moved by a shift mechanism 217 in a plane orthogonal to the imaging optical axes of the lenses 101 and 102 constituting the photographing lens.

An output of a camera shake detection sensor 214 that detects camera shake applied to the camera body 200 is connected to a camera shake correction circuit 215. The camera shake correction circuit 215 receives a control signal from the input / output circuit 239 and outputs the camera shake correction signal to the shift mechanism drive circuit 216 and the input / output circuit 239. The camera shake correction signal input to the input / output circuit 239 is sent to the image processing circuit 227 via the data bus 261.

Further, the shift mechanism 217 moves the image sensor unit 224 by an actuator in the shift mechanism driving circuit 216 that inputs a camera shake correction signal. Accordingly, based on the output of the camera shake sensor 214, the camera shake correction circuit 215 outputs a drive signal to the shift mechanism drive circuit 216 so as to cancel the movement of the camera shake, and the shift mechanism 217 is imaged by an actuator in the shift mechanism drive circuit 216. The element unit 224 is moved. The shift mechanism 217 can move the image sensor unit 224 in a first direction in a plane orthogonal to the imaging optical axis and in a second direction orthogonal to the first direction. Details of the image sensor unit 224, the shift mechanism 217, and the shift mechanism drive circuit 216 will be described later with reference to FIGS.

The image sensor 211 is connected to the image sensor drive circuit 223 and is driven and controlled by a control signal from the input / output circuit 239. The photoelectric analog signal output from the image sensor 221 is amplified by the image sensor drive circuit 223 and subjected to analog-digital conversion (AD conversion). The image sensor driving circuit 223 is connected to an image processing circuit 227 in an ASIC (Application Specific Integrated Circuit) 262, and the image processing circuit 227 performs digital amplification (digital gain adjustment processing) and color of digital image data. Various types of image processing such as correction, gamma (γ) correction, contrast correction, black and white / color mode processing, and through image processing are performed. The image processing circuit 227 also performs electronic camera shake correction that removes blurring applied to the camera by known image processing such as changing the cutout position of the AD-converted image data based on the camera shake correction signal.

The image processing circuit 227 is connected to the data bus 261. In addition to the image processing circuit 227, the data bus 261 includes a sequence controller (hereinafter referred to as "body CPU") 229, a compression / decompression circuit 231, a video signal output circuit 233, an SDRAM control circuit 237, and an input / output circuit 239. The communication circuit 241, the recording medium control circuit 243, the flash memory control circuit 247, and the switch detection circuit 253 are connected.

The body CPU 229 connected to the data bus 261 controls the operation of this digital camera. A compression / decompression circuit 231 connected to the data bus 261 is a circuit for compressing the image data stored in the SDRAM 238 in a still image compression format such as JPEG and decompressing the image data during reproduction. Note that image compression is not limited to JPEG, and other compression methods can be applied. The video signal output circuit 233 connected to the data bus 261 is connected to the rear liquid crystal monitor 26 via the liquid crystal monitor drive circuit 235. The video signal output circuit 233 is a circuit for converting the image data stored in the SDRAM 238 or the recording medium 245 into a video signal to be displayed on the rear liquid crystal monitor 26.

The rear liquid crystal monitor 26 is disposed on the rear surface of the camera body 200. However, the rear liquid crystal monitor 26 is not limited to the rear surface and may be other display devices as long as the photographer can observe. The SDRAM 238 is connected to the data bus 261 via the SDRAM control circuit 237, and the SDRAM 238 temporarily stores the image data processed by the image processing circuit 227 or the image data compressed by the compression / expansion circuit 231. This is a buffer memory. An input connected to the above-described photometric processing circuit 212, camera shake correction circuit 215, shift mechanism driving circuit 216, distance measuring circuit 219, dust filter driving circuit 220, shutter driving mechanism 221, movable mirror driving mechanism 222, and image sensor driving circuit 223. The output circuit 239 controls data input / output with each circuit such as the body CPU 229 via the data bus 261. The communication circuit 241 connected to the lens CPU 111 via the communication contact 300 is connected to the data bus 261, and exchanges data with the body CPU 229 and the like and communicates control commands.

A recording medium control circuit 243 connected to the data bus 261 is connected to the recording medium 245 and controls recording of image data and the like on the recording medium 245. The recording medium 245 can be loaded with any rewritable recording medium such as an xD picture card (registered trademark), a compact flash (registered trademark), an SD memory card (registered trademark), or a memory stick (registered trademark). And is detachable from the camera body 200. In addition, a hard disk unit such as a microdrive (registered trademark) or a wireless communication unit may be connectable.

A flash memory control circuit 247 connected to the data bus 261 is connected to a flash memory 249, and the flash memory 249 stores a program for controlling the flow of the camera. The body CPU 229 controls the digital camera according to the program stored in the flash memory 249. Note that the flash memory 249 is an electrically rewritable nonvolatile memory.

A power switch 257 that is turned on / off in conjunction with a power switch lever for controlling the power supply of the camera body 200 and the interchangeable lens 100, a switch that is linked to a shutter release button, and a playback button that designates a playback mode. Switch, switch linked to the cross button for instructing the movement of the cursor on the screen of the rear LCD monitor 26, switch linked to the display switching button for switching the through image display, switch linked to the mode dial for instructing the shooting mode, selection Various switches 255 such as an OK switch, a dust removal switch, an autofocus / manual focus changeover switch (AF / MF changeover switch), an attachment / detachment detection switch 259, etc., linked to an OK button for determining each mode etc., are provided with a switch detection circuit 253. Connected to the data bus 261

The release button has a first release switch that is turned on when the photographer is half-pressed and a second release switch that is turned on when the photographer is fully pressed. When the first release switch (hereinafter referred to as 1R) is turned on, the camera performs photographing preparation operations such as focus detection, focusing of the photographing lens, and photometry of the subject brightness, and the second release switch (hereinafter referred to as 2R). When it is turned on, a photographing operation for capturing image data of the subject image is executed based on the output of the image sensor. The dust removal switch is a switch that is linked to a dust removal button that is operated when the photographer instructs a dust removal operation. The AF / MF selector switch is a switch for switching between a mode for performing automatic focus adjustment of the interchangeable lens 100 and a mode for performing manual focus adjustment. The attachment / detachment detection switch 259 is a switch that detects whether or not the interchangeable lens 100 is attached to the camera body 200.

Next, the configuration of the image sensor unit 224 and the shift mechanism 217 will be described with reference to FIG. 2A is a perspective view of the image sensor unit 224 and the shift mechanism 217 as viewed from the shutter 213 side, and FIG. 2B is a cross-sectional view taken along line AA. The first substrate 350 formed of a flat hard electric circuit substrate is fixed to the camera body 200. On the first substrate 350, a main substrate 371 on which a control system circuit such as the aforementioned ASIC 262 is mounted is fixed.

A second substrate 351 made of a flat plate is fixed to the front side of the first substrate 350 in parallel with the first substrate 350. Four pins 365a, 365b, 365c, 365d are implanted in the second substrate 351. These four pins 365a, 365b, 365c, 365d are fitted in the long holes 353a, 353b of the first slider 353, and the first slider 353 is slidable in the vertical direction. That is, the pin 365a and the pin 365b arranged in the vertical direction are fitted in the long hole 353a, and the pin 365c and the pin 365d arranged in the vertical direction are fitted in the long hole 353b, and the first slider 353 is slidable in the vertical direction and does not slide in the horizontal direction.

Four pins 367a, 367b, 367c, and 367d are implanted in the first slider 353. The long holes 355a and 355b of the second slider 355 are fitted to these four pins 367a, 367b, 367c and 367d, and are slidable in the left-right direction. That is, the pin 367a and the pin 367b arranged in the left-right direction are fitted in the long hole 355a, and the pin 367c and the pin 367d arranged in the left-right direction are fitted in the long hole 355b, and the second slider 355 is slidable in the left-right direction and does not slide in the up-down direction.

A DC motor (hereinafter abbreviated as a motor) 357 as a Y-direction shifting actuator is fixed to an L-shaped protrusion 351 a near the left side of the second substrate 351, and a drive shaft 357 a of the motor 357 is connected to a drive gear 359. It is fixed to one piece. The drive gear 359 meshes with a spur gear 353c formed on the left side wall of the first slider 353, and the drive gear 359 and the spur gear 353c constitute a so-called rack and pinion. Therefore, when the motor 357 rotates, the drive gear 359 rotates, and the first slider 353 that meshes therewith slides in the vertical direction. In FIG. 2, only the driving gear 359 is depicted as a gear in the driving force transmission system of the motor 357, but it is of course possible to provide a plurality of gear trains to reduce the rotation of the motor 357. .

A DC motor (hereinafter abbreviated as a motor) 361 as an X-direction shifting actuator is fixed to an L-shaped protrusion 353 d provided on the first slider 353, and a drive shaft 361 a of the motor 361 is integrated with the drive gear 363. It is fixed to. The drive gear 363 meshes with a spur gear 355c formed on the side wall of the lower side of the second slider 355, and the drive gear 359 and the spur gear 355c constitute a so-called rack and pinion. Therefore, when the motor 361 rotates, the drive gear 363 rotates, and the second slider 355 that meshes with the drive gear 363 slides in the left-right direction. As in the case of driving in the vertical direction, in FIG. 2, only the driving gear 363 is depicted as the gear in the driving force transmission system of the motor 361, but a plurality of gears are used to reduce the rotation of the motor 361. Of course, it does not matter if a row is provided.

An imaging substrate 373 is provided inside the substantially central opening of the second slider 355. The imaging element 211 is fixed on the imaging substrate 373, and an infrared cut filter 210 is disposed on the front side thereof, and an optical low-pass filter 209 is disposed on the front side. In addition, the piezoelectric element 208 is fixed to the attachment portion 355d at the periphery of the opening of the second slider 355 along the circumference of the opening. And the dustproof filter 207 is arrange | positioned through the vibration transmission body which is not shown in figure. The dust filter 207 is in pressure contact with the piezoelectric element 208 via a vibration transmitting body by a fastener 369. The subject image formed by the lenses 101 and 102 passes through the dust filter 207, the optical low-pass filter 209, and the infrared cut filter 210 and forms an image on the image sensor 211.

Since the image sensor unit 224 and the shift mechanism 217 are configured in this manner, the first slider 353 can slide in the vertical direction (Y direction) on the second substrate 351 when the motor 357 rotates. Similarly, when the motor 361 rotates, the second slider 355 can slide in the left-right direction (X direction) on the first slider 353. That is, by driving and controlling the motor 357 and the motor 361, the second slide 355 that fixes the image sensor 211 can freely move in the X and Y directions in a plane orthogonal to the photographing optical axis. Therefore, based on the output of the camera shake sensor 214, the camera shake correction circuit 215 outputs a signal to the motor 357 and the motor 361 of the shift mechanism drive circuit 216 so as to cancel the camera shake, and the image sensor 211 is spatially moved to thereby shake the camera shake. Can be countered. In addition, when the piezoelectric element 208 receives a drive signal from a dustproof filter drive circuit 220 described later, it vibrates at a frequency higher than the audible frequency and generates a vibration wave, whereby dust attached to the dustproof filter 207 can be removed.

In the present embodiment, the driving range of the first slider 353 and the second slider 355 is determined by the long holes 353a, 353b, 355a, 355b and the pins 365a, 365b, 365c, 365d, 367a, 367b, 367c, 367d. For example, the second substrate 351 and the first slider 353 are provided with contact portions, and the first slider 353 and the second slider 355 are contacted. A contact portion may be provided and moved between them. In that case, if the abutting portion is provided on a movable member such as the first slider 353, the driving mechanism may be adversely affected. Therefore, the abutting portion is preferably provided on a fixed member.

In this embodiment, the DC motor 361 is provided as the X-direction shift actuator and the DC motor 357 is provided as the Y-direction shift actuator. However, the present invention is not limited to this, and a stepping motor or an ultrasonic motor may be employed. good. When the stepping motor is employed, there is an advantage that the position moved from the reference position can be detected by counting the number of applied pulses. In addition, the first slider 353 and the second slider 355 are orthogonal to each other. However, the present invention is not limited to this. For example, the first slider 353 and the second slider 355 may be configured to move in an arc shape. Furthermore, although the structure using the rack and pinion is used as the shift mechanism 217 of the image sensor 211, the present invention is not limited to this, and various structures such as a shift mechanism using a piezoelectric element can be used.

Next, the configuration of the camera shake sensor 214, the camera shake correction circuit 215, and the shift mechanism drive circuit 216 in the present embodiment will be described with reference to FIG. The camera shake sensor 214 detects a camera shake in the longitudinal direction (X direction) of the camera body 200 as the first direction, and a camera shake in the height direction (Y direction) of the camera body 200 as the second direction. It comprises a camera shake sensor Y214b to be detected. Here, the camera shake sensor includes a known gyro, angular velocity sensor, acceleration sensor, shock sensor, or the like.

The camera shake correction circuit 215 includes an X signal processing circuit 215a, a Y signal processing circuit 215b, and a camera shake calculation circuit 215c connected to outputs of these circuits. The X signal processing circuit 215a is connected so that the output of the camera shake sensor X214a is input, processes a signal related to camera shake in the X-axis direction, and outputs the signal to the camera shake calculation circuit 215c. The Y signal processing circuit 215b is connected so that the output of the camera shake sensor Y214b is input, processes a signal related to camera shake in the Y-axis direction, and outputs the signal to the camera shake calculation circuit 215c. The camera shake calculation circuit 215c calculates a drive amount necessary to cancel the camera shake in the X-axis direction and the Y-axis direction, respectively, and outputs it to the shift mechanism drive circuit 216.

The shift mechanism drive circuit 216 includes a driver 216a, a motor 361 as an X-direction shift actuator, and a motor 357 as a Y-direction shift actuator. These actuators correspond to the motor 361 and the motor 357 shown in FIG. The X-direction shift actuator 361 and the Y-direction shift actuator 357 are driven according to the output from the driver 216a.

The driver 216 a is connected so that the output of the camera shake calculation circuit 215 c of the camera shake correction circuit 215 is input. Then, the driver 216a drives and controls the X-direction shift actuator 361 and the Y-direction shift actuator 357 according to the output of the camera shake correction circuit 215, so that the camera shake correction operation is performed.

A camera shake correction operation start / stop control signal output from the body CPU 229 via the input / output circuit 239 is applied to the camera shake correction circuit 215, and start and stop of camera shake correction are controlled according to this control signal. When the start control of the camera shake correction operation is performed, the camera shake correction circuit 215 outputs a control signal to the driver 216a of the shift mechanism drive circuit 216. In addition, camera shake correction information based on the camera shake correction signal is output to the image processing circuit 227 via the input / output circuit 239 to perform an electronic camera shake correction operation. In the present embodiment, as the image stabilization function, the image sensor 211 is moved based on the output of the camera shake detection sensor 214. However, the present invention is not limited to this, and a part of the photographing lens is moved. Of course, the camera shake may be canceled out.

Next, the operation of the digital single-lens reflex camera according to the first embodiment will be described with reference to the flowcharts shown in FIGS. First, when a power-on reset is performed, for example, when a power supply battery is loaded in the camera body 200, initialization is performed (# 1). In the initial setting, the port and memory of each electronic element are initialized, and a reset operation is performed so that the mechanical parts are in the initial positions. Subsequently, the state of the power switch 257 is detected (# 3). As a result of the detection, if the power switch 257 is in the off state, the standby state in which step # 3 is repeatedly executed is entered.

If the result of detection in step # 3 is that the power switch 257 is in the on state, the switch detection circuit 253 indicates the state of the various switches 255 such as the 1R switch, 2R switch, shooting mode switch, and menu switch, and the attach / detach switch 259. Then, the manual operation member (distance ring) of the interchangeable lens 100 detects the operation state by the operation detection switch 113 (# 5). Subsequently, based on the state of the shooting mode switch and menu switch obtained by the switch detection, mode change processing such as a shooting mode and an image quality mode is performed (# 7).

Next, based on the state of the switch interlocked with the display switching button obtained by the switch detection in step # 5, it is determined whether or not the through image display mode is set (# 9). If the through image display mode is set as a result of the determination, step # 53 shown in FIG. 6 is used to switch from the subject image observation by the optical finder to the subject image observation by the through image display by the rear liquid crystal monitor 26. The details will be described later.

If the result of determination in step # 9 is not live view display mode, the state of the 1R switch is determined based on the detection result obtained by switch detection in step # 5. If the result of determination is that the 1R switch is off, processing returns to step # 3 and the above steps are repeated.

If the 1R switch is on in step # 11, that is, if the photographer has pressed the release button halfway, the state of the AF / MF selector switch detected in step # 5 is determined (S13). . If the result of determination is that automatic focus adjustment (autofocus, AF) has been set, distance measurement and lens drive amount calculation are performed (# 15). The distance measurement and the lens drive amount calculation are based on the outputs from the distance measurement sensor 218 and the distance measurement circuit 219, and detect the focal shift amount of the lenses 101 and 102 constituting the photographing lens by a known TTL phase difference method. Based on the above, a lens driving amount for driving to the in-focus position is obtained by calculation. Subsequently, based on the focus shift amount or the lens drive amount, it is determined whether or not the lens is within the focusing range (# 17).

If the result of determination is that the lens is not within the in-focus range, the lens driving amount obtained in step # 15 is transmitted to the lens CPU 111, and the lens driving mechanism 107 is controlled to drive the photographic lens to the in-focus position ( # 23). When the focusing operation is completed, the process proceeds to step # 11 and the above steps are repeated. Therefore, when the live view display mode is not selected (that is, the optical viewfinder observation mode is selected) and the release button is pressed halfway (shooting preparation state), measurement by the TTL phase difference method is performed until the in-focus state is reached. Distance and focus drive are performed. During this time, the subject image is observed with an optical viewfinder and no image stabilization operation is performed.

If the result of determination in step # 17 is that it is within the in-focus range, the state of the 2R switch is detected (# 19). If the 2R switch is off, that is, if the photographer has not fully pressed the release button, the state of the 1R switch is subsequently detected (# 21), and if the 1R switch is on, step # Returning to 19, and if the 1R switch is OFF, the process returns to step # 3 and the above steps are repeated. In other words, when the release button is in the half-pressed state, a standby state in which steps # 19 and # 21 are repeatedly detected is entered, and when the photographer's hand leaves the release button, the process returns to step # 3.

If manual focus adjustment (manual focus, MF) has been set in step # 13, then a defocus amount (focus shift amount) is detected. This detection is performed in the same manner as the TTL phase difference method performed in step # 25, but the lenses 101 and 102 are not driven because of the manual focus adjustment mode. Subsequently, in-focus / in-focus display is performed on a display member (not shown) based on the defocus amount (# 27). In the manual focus mode, the lenses 101 and 102 are brought into focus by the photographer manually operating a focus adjustment operation member provided on the outer periphery of the interchangeable lens 100. The in-focus / in-focus state by this manual operation is displayed.

When the in-focus / in-focus display is performed, next, as in step # 19, the 2R switch is detected (# 29). If the result of determination is that it is off, processing returns to step # 13 and the above-described operation is repeated. That is, while the release button is pressed halfway and in the shooting preparation state, the defocus amount of the interchangeable lens 100 is obtained by the phase difference TTL method based on the outputs from the distance measuring sensor 218 and the distance measuring circuit 219, and the in-focus state is obtained.・ Displays out of focus. Therefore, the photographer only needs to manually adjust the focus so that the focus adjustment operation member is operated to be in focus.

If it is determined in step # 19 or step # 29 that the 2R switch is on, the process proceeds to an imaging operation for recording a still image based on the output of the imaging element 211 (see FIG. 5). When the imaging operation is started, photometry and exposure amount calculation are first performed (# 31). In this step, the subject brightness is measured based on the output of the photometric sensor 206, and the exposure amount is calculated based on the subject brightness obtained here by calculating the shutter speed and / or the aperture value. Subsequently, in order to prevent the subject image from blurring due to camera shake, the mechanical camera shake correction mechanism operation is started (# 33). The operation of the mechanical camera shake correction mechanism is started by transmitting a camera shake correction operation start signal to the camera shake correction circuit 215 (see FIG. 3) via the input / output circuit 239, thereby the motors 357 and 361 of the shift mechanism drive circuit 216. However, the image sensor 211 is driven so as to cancel the camera shake.

Next, the movable reflecting mirror 201 is moved up (# 35). Before the movable reflecting mirror 201 is raised (that is, in the down state), the subject luminous flux that has passed through the lenses 101 and 102 of the photographing lens is reflected by the movable reflecting mirror 201 and formed on the focusing screen 203, and the subject image is optical. It can be observed with a viewfinder. In this state, the subject luminous flux is not guided to the image sensor 211, but can be guided to the image sensor 211 when the movable reflection mirror 201 is raised. Subsequently, the front curtain of the shutter 213 starts running, and the shutter 213 is opened (# 37). As a result, a subject image is formed on the image sensor 211, and exposure is started (# 39).

When the exposure time corresponding to the set shutter speed or the shutter speed obtained by calculation in step # 31 has elapsed according to the shooting mode set in step # 7, the rear curtain of the shutter 213 is run and the shutter is closed ( # 41). Subsequently, the movable reflecting mirror 201 is moved down and the shutter 213 is charged (# 43). Since the exposure operation is completed, the operation of the mechanical camera shake correction mechanism is stopped (# 45).

In the present embodiment, in the imaging operation at the time of subject image observation by the finder optical system, the shift mechanism 217, the shift mechanism drive circuit 216, and the camera shake correction circuit are between Step # 33 and Step # 45 before and after obtaining image data. An image sensor 211 is driven by a mechanical camera shake correction mechanism including the camera shake sensor 214 and the camera shake sensor 214 so as to cancel the influence of the shake applied to the camera body. The camera shake correction mechanism only needs to operate before and after the exposure operation in step # 39. For example, the camera shake correction mechanism may be started before the photometric exposure calculation, or may be stopped after media recording described later.

Next, image data is read from the image sensor 211 (# 47), image processing is performed by the image processing circuit 227 or the like (# 49), and a still image is recorded on the recording medium 245 (# 51). When the recording of the still image is finished, the process returns to step # 3 and the above steps are repeated. Through the above steps, when the photographer fully presses the release button while observing the subject image with the optical viewfinder, the image data obtained by the image sensor 211 is recorded on the recording medium 245.

Returning to step # 9, if the through image display mode is selected by operating the display switching button, the process proceeds to step # 53 in FIG. 6, and photometry / exposure amount calculation is performed in the same manner as in step # 31. # 53). Next, as in step # 35, the movable reflecting mirror 201 is moved up (# 55). When the up operation is finished, the shutter 213 is opened as in step # 37 (# 57). As a result, the movable reflecting mirror 201 is retracted from the photographing optical axis and the shutter 213 is opened, so that a subject image is formed on the image sensor 211.

Thereafter, in order to set the electronic shutter speed and sensitivity conditions for driving the image sensor 211, a through image condition setting 1 subroutine is executed using the photometric / exposure amount calculation result obtained in step # 53 ( # 59). By executing this subroutine, an image with appropriate brightness (brightness) can be displayed on the rear liquid crystal monitor 26. When the through image condition setting 1 is completed, the through image display is ready, and the live image display of the subject image is started on the rear liquid crystal monitor 26 (# 61). In the present embodiment, the frame rate of the live view display is 30 fps (flame per sec), and the frame interval is 33 msec. The through image display operation is controlled by the image processing circuit 227 in response to the start instruction.

Subsequently, switch detection is performed as in step # 5 (# 63), and mode change processing is performed as in step # 7 (# 65). Based on the state of the display changeover switch obtained at the time of switch detection, it is determined whether or not it is the through image display mode (# 67). If it is not the through image display mode, the through image display mode is canceled. In order to display the subject image with the optical viewfinder, step # 71 and the subsequent steps are executed.

First, the through image display on the rear liquid crystal monitor 26 is stopped (# 71), and then the shutter 213 is closed (# 73) as in step # 41. As a result, the subject image is not guided onto the image sensor 211. Subsequently, the movable reflection mirror 201 is lowered, and the shutter 213 is charged by the shutter (# 75). Since the live view display is stopped by this series of operations, the camera shake correction operation by the mechanical camera shake correction mechanism is unnecessary, and the operation of the mechanical camera shake correction mechanism is stopped (# 77). When the operation of the mechanical camera shake correction mechanism is stopped, the process returns to step # 3 and the above steps are repeated.

Returning to step # 67, if the result of determination is that the through image display mode has been selected, the state of the power switch 257 is then detected (# 69). If the result of detection is OFF, in order to turn off the power, the process proceeds to step # 71 and the subsequent steps to cancel the live view display, and then returns to step # 3.

If the result of determination in step # 69 is that the power switch 257 is on, it is determined whether the release button is half-pressed, that is, whether the 1R switch is on (# 81). If the result of determination is that the switch is on, the state of the AF / MF selector switch, which is one of the various switches 255 detected at step # 63, is determined (# 83). If the result of determination is that the automatic focus adjustment (AF) mode has been set, the operation of the mechanical image stabilization mechanism is started (# 85). Thus, based on the detection result of the camera shake sensor 214, the shift mechanism 217 drives the image sensor 211 so as to cancel the camera shake.

Next, the lenses 101 and 102 are automatically focused based on the output of the image sensor 211 (# 87). When the through image display mode is not selected, the movable reflecting mirror 201 is down, and the subject light flux that has passed through the interchangeable lens 100 is incident on the distance measuring sensor 218 by the sub mirror 202. Therefore, in the non-through image display mode, the defocus amounts of the lenses 101 and 102 can be detected by the TTL phase difference method.

However, during live view display, since the movable reflection mirror 201 is up, distance measurement by the TTL phase difference method cannot be performed. Instead, during live view display, the subject light flux is incident on the image sensor 211, so that focus adjustment can be performed by a so-called hill-climbing method. In this focus adjustment, a high frequency component is extracted from the output of the image sensor 211, and the lenses 101 and 102 are automatically adjusted so that the high frequency component becomes maximum.

Subsequently, it is determined whether or not the result of the automatic focus adjustment in step # 87 is within the in-focus range (# 89). If the result of determination is out of focus, the process returns to step # 87 to perform automatic focus adjustment. As a result of the determination, if it falls within the in-focus range, the mechanical shake correction mechanism operation started in step # 85 is stopped (# 91). As described above, when the automatic focus adjustment is selected (# 83), the live view is being displayed (# 67), and the release button is half-pressed to be ready for shooting (# 81), the camera shake correction is performed. (Anti-vibration function) is activated.

When the mechanical camera shake correction mechanism is stopped in step # 91, the state of the 2R switch is detected (# 93). If the result of detection is OFF, through image condition setting 2 is executed (# 95). This through image condition setting 2 is a subroutine for the purpose of appropriately maintaining the brightness of the through image display on the liquid crystal monitor 26. Since the through image condition setting 1 in step # 59 was before the through image display, it was performed based on the output of the photometric sensor 206. However, in the through image condition setting 2, the target lightness and the screen lightness based on the previous imaging result are used. Then, the electronic shutter speed and sensitivity at the next imaging are determined from the difference. Here, the brightness is a value corresponding to a weighted average value of each pixel output of the image sensor 211, for example. When the through image condition setting 2 subroutine is completed, the process returns to step # 63 to repeat the above steps.

Returning to step # 81, if the result of the determination of the 1R switch is OFF, that is, if the hand is released from the release button, the shooting preparation operation is stopped, so that the camera shake correction operation is performed. Stop camera shake correction operation. First, it is determined whether or not the camera shake correction operation is being performed (# 97). If not, the process proceeds to step # 95 described above. If it is operating, the operation of the mechanical camera shake correction mechanism is performed. Is stopped (# 99).

Next, if it is determined in step # 83 that manual focus adjustment (manual focus MF) has been set, the process proceeds to step # 101 shown in FIG. 7 to determine whether there is distance ring information. This is performed by detecting whether or not the distance ring of the interchangeable lens 100 has been operated by the operation detection switch 113. If the result of determination is that the distance ring has been operated, the operation of the mechanical camera shake correction mechanism is started as in step # 85 (# 103). Subsequently, the timer operation is started (# 105).

After starting the timer or if it is determined in step # 101 that the distance ring has not been operated, it is subsequently determined whether the timer operation has been completed (# 107). When the timer detects that a predetermined time has elapsed, the operation of the mechanical camera shake correction mechanism is stopped (# 109) similarly to step # 91, and the timer timing operation is stopped (# 111).

In this embodiment, when the manual focus adjustment mode is selected and the release button is half-pressed (# 81), when the photographer operates the distance ring (# 101), the mechanical image stabilization mechanism operates. Is started (# 103), and even if there is no operation in the distance ring, the operation of the mechanical image stabilization mechanism is continued for a predetermined time counted by the timer.

If the timer does not complete the timekeeping operation for a predetermined time (when the timekeeping operation is being performed in # 107) or if the timer operation is stopped after the timekeeping operation is terminated (# 111), then defocusing is performed as in step # 25. The amount is detected (# 113), and the in-focus display is performed (# 115). During the live view display, as described above, focus detection is performed by the hill-climbing method using the output of the image sensor 211, Displays the focus state. After performing in-focus / in-focus display, the process returns to step # 93 to repeat the above-described steps.

If the hand is released from the release button during the camera shake correction operation and the 1R switch is turned off, the camera shake correction operation is immediately stopped even if the timer timing operation is not completed. That is, when the distance ring is operated, the mechanical camera shake correction mechanism operation is started (# 103), and the timer timing operation is started (# 105). Thereafter, as long as the 1R switch is on until the timer timing operation is completed, # 107 → # 113 → # 115 → # 93 (FIG. 6) → # 95 → # 63 →... → # 81 → The loop of # 83 → # 101 (FIG. 7) → # 107 →... Is repeatedly executed. If the 1R switch is turned off during execution of this loop, the process proceeds from step # 81 to step # 97 and step # 99, and the camera shake correction operation is immediately stopped.

Returning to step # 93, when the 2R switch is turned on during the through image display, the operation proceeds to an imaging operation for recording a still image based on the output of the imaging device 211. When the imaging operation is started, first, similarly to step # 33, the operation of the mechanical camera shake correction mechanism is started (# 121). This is to prevent the image from blurring and unsightly during the shooting operation. Subsequently, the live view display is stopped (# 123), the shutter 213 is closed (# 125), and the charging operation is performed (# 127). The shutter 213 is in an open state during the live view display, but before the exposure operation starts, the shutter 213 for controlling the exposure time is temporarily closed and charged to initialize the shutter 213, thereby exposing the exposure time. Allows control.

Subsequently, the travel of the shutter front curtain of the shutter 213 is started and the shutter is opened (# 129). As a result, a subject image is formed on the image sensor 211, and exposure is started (# 131). When the exposure time corresponding to the set shutter speed or the shutter speed obtained by the calculation in step # 53 has elapsed according to the shooting mode set in steps # 7 and # 65, the rear curtain of the shutter 213 is caused to travel and Closing is performed (# 133). Subsequently, the shutter 213 is charged (# 135). In the live view display mode, since the movable reflecting mirror 201 may remain up, unlike the case of step # 43, the mirror down operation is not performed. In the case of a type of camera in which the movable reflection mirror 201 and the shutter 213 cannot be driven independently, the mirror may be lowered here.

When the shutter charge ends, the operation of the mechanical camera shake correction mechanism is stopped (# 137), image data reading (# 135), image processing (# 139), and media recording (# 141) are performed. Since these steps are the same as steps # 45, # 47, # 49, and # 51 described above, details are omitted. When the media recording is completed, the process returns to step # 53 and operates in the through image display mode.

As described above, in the first embodiment of the present invention, when the manual focus adjustment mode is selected during live view display, the camera shake correction operation is not started immediately, but only when the shooting preparation operation is started. The camera shake correction operation is performed. If there is camera shake when performing manual focus adjustment, it is difficult to focus because the subject in focus is blurred, but the subject is not blurred due to camera shake correction (anti-vibration function). Easy to make.

In addition, the camera shake correction operation consumes a large amount of power, but in this embodiment, even when the manual focus adjustment mode is entered in the live view display, the camera shake correction operation is not immediately started and the release button is half Since the camera shake correction operation is started when the camera is pressed and is ready for photographing, the power consumption of the power supply battery can be minimized. Further, even when the camera shake correction operation is performed, the camera shake correction operation is ended when the shooting preparation operation is finished (# 99), so that the consumption of the power supply battery can be further suppressed.

Furthermore, even if there is no distance ring operation during the camera shake correction operation, the camera shake correction operation is continued for a predetermined time (# 107, # 109). Therefore, when the photographer focuses the distance ring, Even when the operation is temporarily stopped, the camera shake correction operation is not interrupted, and it is easy to perform manual focus adjustment.

Furthermore, in the present embodiment, even in the manual focus adjustment mode, the focus state is detected and displayed using the output of the image sensor 211. Therefore, manual focus adjustment is performed only with the live view display. Compared to the case, focusing is easier.

In this embodiment, camera shake correction information is output from the camera shake correction circuit 215 to the image processing circuit 227 from the input / output circuit 239. However, in the description of this embodiment, an electronic camera shake correction operation is not performed. May be omitted.

Next, a second embodiment of the present invention will be described with reference to FIG. In the first embodiment, the camera shake correction operation is started by operating the distance ring. When the hand is released from the release button and the 1R switch is turned off during the camera shake correction operation, the timer timing operation is not completed. Even if there was, the camera shake correction operation was immediately stopped. In the second embodiment, even if the 1R switch is turned off during the camera shake correction operation, the camera shake correction operation is continued until the timer timing operation is completed.

The configuration of the second embodiment is the same as the configuration of the first embodiment except that steps # 97 and # 99 in the flowchart shown in FIG. 6 are replaced with steps # 201 to # 207 in the flowchart shown in FIG. Since it is the same, description of the same part will be omitted, and the difference will be mainly described.

If the 1R switch is off in step # 81, it is next determined whether or not the timer is operating (# 201). Here, when the distance ring is operated, it is detected in step # 105 whether or not the timer that started the timing operation is in the timing operation. If the timing operation is being performed, it is next determined whether the timing operation has been completed (# 203). In other words, the timer proceeds from step # 201 to step # 203 during time count to step 95 until the predetermined time elapses after the distance ring operation ceases, and during this time, the mechanical shake correction operation is continued.

As a result of the determination in step # 203, when the timekeeping operation is completed, the operation of the mechanical camera shake correction mechanism is stopped (# 205), and the timekeeping operation of the timer is stopped (# 207). If the timekeeping operation is not being performed (No in Step # 201), if the timer timekeeping has not been completed (in the case of timekeeping in Step # 203), or if the timer in Step # 207 is stopped, the process proceeds to Step # 95. The same steps as in the first embodiment are repeated.

Also in the second embodiment, as in the first embodiment, even if the manual focus adjustment mode is entered in the through image display, the camera shake correction operation is not immediately started, and the release button is half-pressed to prepare for shooting. Since the camera shake correction operation is started when the state is reached, the consumption of the power supply battery can be minimized. Further, even when the camera shake correction operation is performed, the camera shake correction operation is ended when the shooting preparation operation is finished (# 205), so that the consumption of the power supply battery can be further suppressed.

Further, in the second embodiment, even if the 1R switch is turned off during execution of the camera shake correction operation, the camera shake correction operation is not performed immediately as in the first embodiment, and the camera shake correction operation is performed for a predetermined time. Running. For this reason, even when the user releases the half-press of the release button to change the grip, the focus state can be displayed with high accuracy for a predetermined time.

Next, a third embodiment of the present invention will be described with reference to FIGS. In the second embodiment, a camera shake correction (anti-shake) operation during live view display is performed by a mechanical camera shake correction mechanism including a shift mechanism 217, a shift mechanism drive circuit 216, and the like. In the third embodiment, the camera shake correction operation is performed by electronic camera shake correction. The electronic camera shake correction is a correction for changing the cut-out position of image data based on the output from the image sensor 211 based on the output of the camera shake sensor 214 to obtain an image from which the camera shake is removed, and is performed by the image processing circuit 227 or the like. Is called.

The configuration of this third embodiment is the same as the configuration of the second embodiment, but step # 77 in the flowchart shown in FIG. 9 is changed to step # 377, step # 85 is changed to step # 385, and step # 91 is changed to step # 391. Step # 205 is the same as Step # 305, except that Step # 103 in the flowchart of FIG. 7 constituting the second embodiment is replaced with Step # 303, and Step # 109 is replaced with Step # 309. The description of the same part will be omitted, and the description will focus on the differences.

If the live view display mode is selected (Yes in step # 9 in FIG. 4), the flow proceeds to the flow shown in FIG. 10, and if the AF / MF selector switch is in the automatic focus adjustment (AF) mode in step # 83. Then, electronic camera shake correction is started based on the camera shake information (# 385). In electronic camera shake correction, as described above, the image processing circuit 227 corrects camera shake by image processing.

Subsequently, as in the second embodiment, the focus state is detected by the hill-climbing method based on the output of the image sensor 211, and the lenses 101 and 102 are driven toward the in-focus position (# 87). Then, it is determined whether or not the focus range is entered (# 89), and steps # 87 and # 89 are repeated until the focus range is entered. When the in-focus range is entered, the electronic camera shake correction operation started in step # 385 is stopped (# 391).

If the result of determination is manual focus adjustment (MF) mode in step # 83, distance ring information is determined (# 101), and if the distance ring is being operated, as in step # 395. Then, electronic camera shake correction is started based on the camera shake information (# 303). Then, the timer operation is started (# 105), and it is determined whether or not the predetermined time operation is completed (# 107). If completed, the electronic camera shake correction started in step # 303 is stopped ( # 309).

Next, when the electronic camera shake correction is performed in the manual focus adjustment mode, when the release button is released and the 1R switch is turned off, it is determined whether or not the time is being measured (# 201 in FIG. 10). If the timer timing has been completed, it is determined whether the timer timing has been completed (# 203). If the timer timing has not been completed, the electronic image stabilization is continued as it is, while if the timer timing has been completed, The electronic camera shake correction operation is stopped (# 305).

If the through image display mode is canceled in step # 67, the through image display is stopped (# 71), the shutter 213 is closed (# 73), and the movable reflecting mirror 201 is lowered. And the shutter 213 is charged (# 75). If electronic camera shake correction is being performed, electronic camera shake correction is stopped (# 377).

Steps # 33, # 45 (FIG. 4), # 121, and # 137 (FIG. 8), which also constitute the third embodiment, start or operate the mechanical camera shake correction mechanism, as in the first and second embodiments. It is a stop. Compared to electronic image stabilization, the image stabilization operation using the mechanical image stabilization mechanism is generally advantageous in that it can correct even when the amount of blurring is large. Only when the operation is performed, the mechanical camera shake correction mechanism is operated, and when displaying a through image, there is a high possibility that it will take a long time, so electronic camera shake correction is performed.

Also in the third embodiment, as in the first and second embodiments, even when the manual focus adjustment mode is entered in the through image display, the camera shake correction operation is not immediately started and the release button is half-pressed. Since the camera shake correction operation is started in the shooting preparation state, the power consumption of the power supply battery can be minimized. Even when the camera shake correction operation is performed, the camera shake correction operation is terminated when the shooting preparation operation is completed (# 305), and thus the consumption of the power source battery can be further suppressed.

In the third embodiment, since the camera shake correction operation during live view display is electronic camera shake correction, the power consumption of the power supply battery can be further reduced. Furthermore, since the camera shake correction operation during the photographing operation is mechanical camera shake correction, the camera shake correction can be performed even when the amount of shake is large.

Next, 4th Embodiment of this invention is described using FIG. 12 and FIG. In the third embodiment, the electronic shake correction (anti-shake) operation during the live view display is performed in both the automatic focus adjustment mode and the manual focus adjustment mode. In the fourth embodiment, in the automatic focus adjustment mode, the camera shake correction operation is performed by the mechanical camera shake correction mechanism including the shift mechanism 217 and the shift mechanism drive circuit 216, while in the manual focus adjustment mode. This is done by electronic camera shake correction.

The configuration of the fourth embodiment is the same as the configuration of the third embodiment except that step # 385 is replaced with step # 85, and step # 391 is replaced with step # 91. Omitted, the description will focus on the differences.

When the live view display mode is selected (Yes in step # 9 in FIG. 4), the flow proceeds to the flow shown in FIG. 12, and in step # 83, the AF / MF selector switch is in the automatic focus adjustment (AF) mode. As in the first and second embodiments, the operation of the mechanical camera shake correction mechanism is started (# 85). Then, automatic focus adjustment by hill-climbing method is performed based on the output of the distance measuring sensor 218, and when in focus (# 87, # 89), the mechanical shake correction mechanism of the mechanical camera shake correction mechanism is similar to the first and second embodiments. Stop operation.

If the result of determination is manual focus adjustment (MF) mode in step # 83, processing proceeds to the flowchart shown in FIG. 11, and electronic camera shake correction is performed in the same manner as in the third embodiment. At this time, if the hand is released from the release button and the 1R switch is turned off (OFF in # 81), electronic camera shake correction is stopped if the timer timing is completed (# 305). If the live view display mode is canceled (No in # 67), electronic camera shake correction is stopped (# 377).

Also in the fourth embodiment, as in the first to third embodiments, even when the manual focus adjustment mode is entered in the through image display, the camera shake correction operation is not immediately started and the release button is half-pressed. When the camera is ready to shoot, the camera shake correction operation is started. For this reason, the consumption of the power battery can be minimized. Even when the camera shake correction operation is performed, the camera shake correction operation is terminated when the shooting preparation operation is completed (# 305), and thus the consumption of the power source battery can be further suppressed.

In the fourth embodiment, the camera shake correction is switched between operating the mechanical camera shake correction mechanism and electronic camera shake correction according to the automatic focus adjustment mode or the manual focus adjustment mode. In the automatic focus adjustment, the in-focus point is reached in a relatively short time, whereas in the manual focus adjustment, individual differences are large, and in general, it tends to be longer than the automatic. Therefore, in the fourth embodiment, in the case of manual focus adjustment, which tends to be a long time, the camera shake correction is performed by the electronic camera shake correction, so that the consumption of the power supply battery can be suppressed.

As described above, in each embodiment of the present invention, the image pickup device 211 that acquires the subject image via the lenses 101 and 102 and the mechanical camera shake correction mechanism or electronic device that performs the camera shake correction based on the output of the camera shake sensor 214. It has means for correcting camera shake and manual focus adjusting means for adjusting the focus of the lenses 101 and 102 in response to the operation of a distance ring functioning as a focus adjustment operation member, and the release button is half-pressed In this state (ON in step # 81), when the distance ring is operated, the operation of the mechanical camera shake correction mechanism or the electronic camera shake is executed (steps # 103 and # 303). For this reason, even if the focus adjustment operation member is operated, if the release button is not half-pressed, the camera shake correction function does not operate, so that wasteful power consumption can be prevented.

In each embodiment, the manual focus adjustment is configured such that the photographer manually drives the distance ring, but it may be replaced with a known power focus, in which case the operation detection switch 113 is In addition to detecting the movement of the distance ring, a power focus operation switch may also be used. In this embodiment, the automatic focus adjustment and the manual focus adjustment are switched by the AF / MF switch. However, the present invention is not limited to this, and it is of course possible to make the setting on a screen such as a menu mode. Absent.

In each embodiment, the mechanical camera shake correction mechanism includes the camera shake correction circuit 215, the shift mechanism 216, the shift mechanism 217, and the like, and moves the image sensor 211 based on the output of the camera shake sensor 214 to eliminate the influence of camera shake. I was trying to do it. However, the present invention is not limited to this. For example, the lens 101 or 102 may be moved in a plane orthogonal to the optical axis to eliminate the influence of camera shake.

In the description of the embodiments of the present invention, a digital single lens reflex camera is taken as an example. However, the present invention is not limited to this, and an electronic imaging device such as a compact digital camera or a mobile phone capable of performing camera shake correction (anti-vibration function) and manual focus adjustment Of course, it can be applied.

1 is a block diagram illustrating an overall configuration of a digital single-lens reflex camera according to a first embodiment of the present invention. It is a figure which shows the structure of the image pick-up element unit and shift mechanism in 1st Embodiment of this invention, Comprising: (A) is an external appearance perspective view, (B) is AA sectional drawing. It is a block diagram which shows the circuit structure of the camera-shake sensor, camera-shake correction circuit, and shift mechanism drive circuit in 1st Embodiment of this invention. It is a flowchart of the power-on reset in 1st Embodiment of this invention. It is a flowchart of the power-on reset in 1st Embodiment of this invention. It is a flowchart of the power-on reset in 1st Embodiment of this invention. It is a flowchart of the power-on reset in 1st Embodiment of this invention. It is a flowchart of the power-on reset in 1st Embodiment of this invention. It is a flowchart of the power-on reset in 2nd Embodiment of this invention. It is a flowchart of the power-on reset in 3rd Embodiment of this invention. It is a flowchart of the power-on reset in 3rd Embodiment of this invention. It is a flowchart of the power-on reset in 4th Embodiment of this invention.

Explanation of symbols

26 Rear LCD Monitor 113 Operation Detection Switch 201 Movable Reflective Mirror 211 Image Sensor 213 Shutter 214 Camera Shake Sensor 215 Camera Shake Correction Circuit 216 Shift Mechanism Drive Circuit 217 Shift Mechanism 223 Image Sensor Drive Circuit 224 Image Sensor Unit 227 Image Processing Circuit 229 Body CPU
350 First substrate 351 Second substrate 353 First slider 355 Second slider 357 Y-direction shifting actuator (motor)
361 X-direction shift actuator (motor)

Claims (10)

An image sensor for acquiring a subject image via a photographing lens;
A camera shake correction unit that performs camera shake correction on a subject image acquired by the image sensor based on an output of the camera shake sensor;
Manual focus adjusting means for adjusting the focus of the photographing lens in response to the operation of the focus adjustment operation member;
Control means for operating the camera shake correction means when the focus adjustment operation member is operated in a state where the release button is half-pressed;
A digital camera comprising:   2. The digital camera according to claim 1, wherein the control unit stops the operation of the camera shake correction unit when a predetermined time elapses after the focus adjustment operation member is not operated.   2. The digital camera according to claim 1, wherein the control means stops the operation of the camera shake correction means when the half-press operation of the release button is released. An image sensor for acquiring a subject image via a photographing lens;
According to the output of the camera shake sensor, the camera shake correction means for removing the influence of the camera shake,
Focus adjusting means for adjusting the focus of the photographing lens in accordance with the operation of the focus adjustment operating member;
Operation detection means for detecting the operation of the focus adjustment operation member;
Shooting preparation state instruction means for instructing a shooting preparation state;
Control for removing the influence of the camera shake by the camera shake correction means when the camera preparation status instruction is instructed by the camera preparation status instructing means and the operation of the focus adjusting operation member is detected by the operation detecting means. Means,
A digital camera comprising:   The control means has time measuring means for measuring a predetermined time after the operation of the focus adjusting operation member is stopped, and after the predetermined time has elapsed by the time measuring means, the influence of the camera shake by the camera shake correcting means. 5. The digital camera according to claim 4, wherein removal is prohibited.   5. The control unit according to claim 4, wherein when the instruction of the shooting preparation state by the shooting preparation state instruction unit is stopped, the control unit immediately prohibits removal of the influence of the camera shake by the camera shake correction unit. The digital camera described in 1.   The control means has time measuring means for measuring a predetermined time after the operation of the focus adjustment operation member is stopped, and when the instruction of the imaging preparation state by the imaging preparation state instruction means is stopped, the timing means 5. The digital camera according to claim 4, wherein after the predetermined time elapses, removal of the influence of the camera shake by the camera shake correction unit is prohibited.   The camera shake correction means is an electronic camera shake correction means for removing the influence of camera shake by driving the image sensor or the photographing lens and / or an electronic device for removing the effect of camera shake from image data based on the output of the image sensor. The digital camera according to claim 4, wherein the digital camera is a camera shake correction unit.   Furthermore, it has automatic focus adjustment means for automatically adjusting the focus of the photographing lens, and the control means operates the mechanical camera shake correction means when performing manual focus adjustment by the focus adjustment means, 9. The digital camera according to claim 8, wherein when the focus is automatically adjusted by the automatic focus adjustment means, the electronic camera shake correction means is operated.   A live view display means for displaying the image data acquired by the image sensor as a moving image, and the control means is configured to take the ready state for shooting when the moving image is not displayed by the live view display means; 5. The digital camera according to claim 4, wherein the camera shake correction unit is prohibited even when an instruction is issued and an operation of the focus adjustment operation member is detected.