JP2009047730A - Camera shake correction apparatus, photographing apparatus, and movement assist method - Google Patents

Abstract

A camera shake correction device, an imaging device, and a movement assist method capable of reducing a load caused by static friction at the start of movement of a moving member.
When camera shake occurs, an effective lens that suppresses problems caused by camera shake by moving in a direction opposite to the direction of camera shake and an effective lens are supported to be slidable in the direction opposite to the direction of camera shake. A direction that intersects at least one of the shaft 70G and the shaft 70L with the moving direction of the effective lens 70A when starting the movement of the effective lens 70A in the direction opposite to the direction of camera shake. Control to vibrate.
[Selection] Figure 3

Description

  The present invention relates to a camera shake correction device, a photographing apparatus, and a movement assist method, and in particular, when a camera shake occurs, a moving member that suppresses problems caused by the camera shake by moving in a direction opposite to the direction of the camera shake. The present invention relates to a camera shake correction apparatus and a photographing apparatus that are provided, and a movement assist method that can assist the movement of the moving member.

  In recent years, with the increase in resolution of solid-state imaging devices such as CCD (Charge Coupled Device) area sensors and CMOS (Complementary Metal Oxide Semiconductor) image sensors, digital electronic still cameras, digital video cameras, mobile phones, PDAs (Personal Digital Assistants) , Portable information terminals) and other information devices having a photographing function are rapidly increasing. Note that information devices having the above photographing functions are collectively referred to as photographing apparatuses.

  By the way, in this type of photographing apparatus, camera shake during photographing is caused by a pressing operation on a release switch (so-called shutter) or a user who uses the photographing apparatus is in a vibrating place such as in a car or a train. May occur.

  For this reason, as a technique for suppressing the deterioration of the image quality of a photographed image caused by the camera shake, a solid-state image sensor that can change the imaging position of a subject image by moving when a camera shake has occurred. There has been a technique for moving members such as a zoom lens and a focus lens in the direction opposite to the direction of camera shake.

  However, this technique has a problem that a member that can change the imaging position of the subject image by the movement cannot be moved smoothly.

Therefore, as a technique that can be applied to solve this problem, Patent Document 1 discloses that a plurality of drive units and at least one drive unit of the plurality of drive units have a frictional engagement between a driven member and a drive member. Drive that simultaneously drives the one drive unit and at least one of the other drive units when the power is turned on or when the drive of the one drive unit is started. Whether or not the driven member is driven when the circuit and the drive circuit simultaneously drive the one drive unit and at least one of the other drive units of the plurality of drive units. In an electronic device including a detection circuit for detection, the drive circuit may be configured as described above when the drive of the driven member is not confirmed by the detection circuit. When the drive unit and at least one of the other drive units among the plurality of drive units are simultaneously driven and the drive of the driven member is confirmed by the detection circuit, the original operation of the one drive unit is performed. Technology is disclosed.
JP 2004-325827 A

  However, in the technique disclosed in Patent Document 1, it is possible to release the sticking between the driven member and the driving member of the driving unit in which the driven member and the driving member are held by friction engagement. However, there is a problem that the load due to static friction at the start of driving of the driving member cannot be reduced. As a result, there is a case where the minute driving cannot be performed for an application that needs to minutely drive the driving member such as camera shake correction. Here, the “static friction” represents friction that hinders the start of motion, and is sometimes referred to as “static friction”.

  Note that this problem is not limited to the photographing apparatus, and when a camera shake occurs, a problem caused by the camera shake is suppressed by moving the moving member (corresponding to the driving member) in the direction opposite to the direction of the camera shake. This is a problem that can occur with the device.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a camera shake correction device, an imaging device, and a movement assist method that can reduce a load caused by static friction at the start of movement of a moving member. To do.

  In order to achieve the above object, the camera shake correction device according to claim 1 is provided with a moving member that suppresses a problem caused by the camera shake by moving in a direction opposite to the direction of the camera shake when the camera shake occurs. A guide member that slidably supports the moving member in a direction opposite to the direction of the camera shake, and when the movement member starts to move in the direction opposite to the direction of the camera shake, the guide member is moved to the position of the moving member. Control means for controlling to vibrate in a direction crossing the moving direction.

  According to the camera shake correction device according to claim 1, when camera shake occurs, a moving member that suppresses a problem caused by the camera shake by moving in a direction opposite to the direction of the camera shake is provided by the guide member. It is supported so as to be slidable in the direction opposite to the direction of. The guide member includes a linear guide.

  Here, in the present invention, the control means causes the guide member to vibrate in a direction crossing the moving direction of the moving member when the moving member starts moving in the direction opposite to the direction of the hand movement. Be controlled.

  Thus, according to the camera shake correction device according to claim 1, when camera shake occurs, the moving member that suppresses the malfunction caused by the camera shake by moving in the direction opposite to the direction of the camera shake, And a guide member that slidably supports the moving member in a direction opposite to the direction of camera shake, and when the moving member starts to move in the direction opposite to the direction of camera shake, the guide member is moved to the moving member. Therefore, the friction between the moving member and the guide member when starting the movement of the moving member can be changed from static friction to dynamic friction. As a result, it is possible to reduce a load due to static friction at the start of movement of the moving member. The “dynamic friction” represents the resistance generated during the exercise.

  In the present invention, as in the invention described in claim 2, the direction intersecting the moving direction of the moving member may be a direction orthogonal to the moving direction. Thereby, the load by the static friction at the time of the movement start of a moving member can be reduced more reliably.

  Further, according to the present invention, as in the third aspect of the present invention, a power source for moving the moving member in a direction opposite to the direction of the camera shake is also used as a power source for vibrating the guide member. It may be a thing. Thereby, cost reduction and size reduction of an apparatus can be performed.

  Further, the present invention further comprises detection means for detecting at least one of temperature and humidity as in the invention described in claim 4, and when the control means detects temperature by the detection means, the temperature is detected. When the humidity is detected by the detection means, at least one of the amplitude and the vibration speed of the guide member is increased as the humidity increases. It is good also as what controls so that it may increase. As a result, the power consumption for vibrating the guide member is compared with the case where at least one of the amplitude and the vibration speed is fixedly set so as to enable camera shake correction under all environmental temperatures and environmental humidity. Can be reduced.

  On the other hand, in order to achieve the above object, an imaging device according to claim 5 is an imaging device including the camera shake correction device according to any one of claims 1 to 4, wherein the moving member is A solid-state imaging device that captures a subject image, and at least one part of an imaging optical system that forms the subject image on the solid-state imaging device.

  According to the photographing apparatus according to claim 5, a solid-state image pickup device that picks up a subject image that suppresses problems caused by the camera shake by moving in a direction opposite to the direction of the camera shake when the camera shake occurs. And at least one of at least a part of the imaging optical system that forms the subject image on the solid-state imaging device is supported by the guide member so as to be slidable in the direction opposite to the direction of the camera shake.

  Here, in the present invention, when the control means starts moving the solid-state imaging device and at least one of at least a part of the imaging optical system in the direction opposite to the direction of camera shake, the guide member is Control is performed so as to vibrate in a direction crossing the moving direction.

  Thus, according to the photographing apparatus of the fifth aspect, since it operates in the same manner as the camera shake correction apparatus of the present invention, the load caused by static friction at the start of movement of the moving member is reduced, as in the camera shake correction apparatus. be able to.

  On the other hand, in order to achieve the above object, the movement assist method according to claim 6 is a movement that suppresses a problem caused by the camera shake by moving in a direction opposite to the direction of the camera shake when the camera shake occurs. A movement assisting method for assisting movement of the moving member in a camera shake correction apparatus comprising: a member; and a guide member that slidably supports the moving member in a direction opposite to the direction of camera shake, When the movement in the direction opposite to the direction of the hand shake is started, the guide member is controlled to vibrate in a direction crossing the moving direction of the moving member.

  Therefore, according to the movement assist method according to the sixth aspect, since it operates in the same manner as the invention according to the first aspect, similarly to the first aspect, the load due to static friction at the start of movement of the moving member. Can be reduced.

  According to the present invention, when camera shake occurs, a moving member that suppresses a problem caused by the camera shake by moving in the direction opposite to the camera shake direction, and the moving member in the direction opposite to the camera shake direction are provided. A guide member that is slidably supported, and causes the guide member to vibrate in a direction that intersects the moving direction of the moving member when the moving member starts to move in the direction opposite to the direction of the hand movement. As a result, the friction between the moving member and the guide member when starting the movement of the moving member can be changed from static friction to dynamic friction, resulting in static friction at the start of movement of the moving member. The effect that the load can be reduced is obtained.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Here, a case where the present invention is applied to a digital electronic still camera (hereinafter referred to as “digital camera”) that captures a still image will be described.

[First Embodiment]
First, with reference to FIG. 1, the structure of the main part of the electrical system of the digital camera 10 according to the present embodiment will be described.

  As shown in the figure, the digital camera 10 according to the present embodiment is provided with an optical unit 22 including a lens for forming a subject image, and disposed behind the optical axis of the lens. A charge-coupled device (hereinafter referred to as “CCD”) 24 and an analog signal processing unit 26 that performs various analog signal processing on the input analog signal are configured.

  The digital camera 10 also performs an analog / digital converter (hereinafter referred to as “ADC”) 28 that converts an input analog signal into digital data, and performs various digital signal processing on the input digital data. And a digital signal processing unit 30.

  The digital signal processing unit 30 has a built-in line buffer having a predetermined capacity, and also performs control to directly store the input digital data in a predetermined area of the memory 48 described later.

  The output terminal of the CCD 24 is connected to the input terminal of the analog signal processing unit 26, the output terminal of the analog signal processing unit 26 is connected to the input terminal of the ADC 28, and the output terminal of the ADC 28 is connected to the input terminal of the digital signal processing unit 30. . Accordingly, the analog signal indicating the subject image output from the CCD 24 is subjected to predetermined analog signal processing by the analog signal processing unit 26, converted into digital image data by the ADC 28, and then input to the digital signal processing unit 30.

  On the other hand, the digital camera 10 generates a liquid crystal display (hereinafter referred to as “LCD”) 38 that displays a captured subject image, a menu screen, and the like, and a signal for causing the LCD 38 to display the subject image, the menu screen, and the like. The LCD interface 36 supplied to the LCD 38, the CPU (central processing unit) 40 that controls the operation of the entire digital camera 10, the memory 48 that temporarily stores digital image data obtained by photographing, and the memory 48 And a memory interface 46 for controlling access.

  Further, the digital camera 10 includes an external memory interface 50 for enabling the portable memory card 52 to be accessed by the digital camera 10, and a compression / decompression processing circuit 54 for performing compression processing and decompression processing on the digital image data. It is configured to include.

  In the digital camera 10 according to the present embodiment, a flash memory is used as the memory 48 and a smart media (Smart Media (registered trademark)) is used as the memory card 52.

  The digital signal processing unit 30, the LCD interface 36, the CPU 40, the memory interface 46, the external memory interface 50, and the compression / decompression processing circuit 54 are connected to each other via a system bus BUS. Therefore, the CPU 40 controls the operation of the digital signal processing unit 30 and the compression / decompression processing circuit 54, displays various information via the LCD interface 36 to the LCD 38, and the memory interface 46 or the external memory interface to the memory 48 and the memory card 52. 50 can be accessed each.

  On the other hand, the digital camera 10 includes a timing generator 32 that mainly generates a timing signal for driving the CCD 24 and supplies the timing signal to the CCD 24, and the driving of the CCD 24 is controlled by the CPU 40 via the timing generator 32.

  Further, the digital camera 10 is provided with a motor drive unit 34, and driving of a focus adjustment motor, a zoom motor, and an aperture drive motor (not shown) provided in the optical unit 22 is also controlled by the CPU 40 via the motor drive unit 34. The

  That is, the lens according to the present embodiment has a plurality of lenses, is configured as a zoom lens system that can change (magnify) the focal length, and includes a lens driving mechanism (not shown). The lens drive mechanism includes the focus adjustment motor, the zoom motor, and the aperture drive motor, and these motors are each driven by a drive signal supplied from the motor drive unit 34 under the control of the CPU 40.

  Furthermore, the digital camera 10 includes a release switch that is pressed when performing shooting, a power switch that is operated when switching on / off the power of the digital camera 10, a shooting mode that is a shooting mode, and a subject. A mode change switch that is operated when setting any one of the playback modes for reproducing an image on the LCD 38, a menu switch that is pressed when the menu screen is displayed on the LCD 38, and the operation contents up to that point. An operation unit 56 is provided that includes various switches such as a determination switch that is pressed when confirming and a cancel switch that is pressed when canceling the immediately preceding operation content. 56 is connected to the CPU 40. Therefore, the CPU 40 can always grasp the operation state of the operation unit 56.

  Note that the release switch of the digital camera 10 according to the present embodiment is in a state where it is pressed down to an intermediate position (hereinafter referred to as “half-pressed state”) and a state where it is pressed down to a final pressed position beyond the intermediate position. (Hereinafter, referred to as a “fully pressed state”) is configured to be capable of detecting a two-stage pressing operation.

  In the digital camera 10, the AE (Automatic Exposure) function is activated by setting the release switch halfway to set the exposure state (shutter speed, aperture state), and then AF (Auto Focus, When the automatic focusing function is activated and the focus is controlled, exposure (photographing) is performed when the button is fully pressed thereafter.

  The digital camera 10 has a strobe 44 that emits light to irradiate the subject as necessary at the time of shooting, and is interposed between the strobe 44 and the CPU 40, and power for causing the strobe 44 to emit light under the control of the CPU 40. And a charging unit 42 for charging the battery. Further, the strobe 44 is also connected to the CPU 40, and the light emission of the strobe 44 is controlled by the CPU 40.

  Here, the digital camera 10 according to the present embodiment includes a camera shake amount detection sensor for detecting the amount of shake of the main body of the digital camera 10 in each direction of the yaw direction (horizontal direction) and the pitch direction (vertical direction). 60 and a temperature sensor 62 for detecting the temperature inside the main body of the digital camera 10. In the digital camera 10 according to the present embodiment, the acceleration sensor that detects the acceleration in the yaw direction and the acceleration sensor that detects the acceleration in the pitch direction are applied as the camera shake amount detection sensor 60. However, it goes without saying that a sensor capable of detecting the amount of camera shake other than this may be applied. In the digital camera 10 according to the present embodiment, a thermistor is applied as the temperature sensor 62, but it goes without saying that a sensor capable of detecting other temperatures may be applied.

  The camera shake amount detection sensor 60 and the temperature sensor 62 are also connected to the CPU 40, and the CPU 40 can grasp the detection result by the camera shake amount detection sensor 60 and the detection result by the temperature sensor 62.

  By the way, the digital camera 10 according to the present embodiment is equipped with a camera shake correction function capable of suppressing deterioration in image quality of a captured image caused by camera shake when performing shooting.

  In the camera shake correction function according to the present embodiment, the camera shake amount detection sensor 60 detects the acceleration in the yaw direction and the pitch direction of the apparatus main body, and based on the detected acceleration, the plurality of lenses are most effective for camera shake correction. The amount of movement of a certain lens (hereinafter referred to as “effective lens”) in the yaw direction and pitch direction is calculated, and the position of the effective lens is moved in the direction opposite to the direction of movement due to camera shake based on the calculated amount of movement. As a result, the shift of the imaging position of the subject image on the imaging surface of the CCD 24 due to the camera shake is corrected.

  FIG. 2 shows an arrangement position of the effective lens unit 70 including the effective lens. As shown in the figure, the effective lens unit 70 according to the present embodiment is disposed at a substantially central portion in the apparatus main body of the digital camera 10.

  FIG. 3 shows a front view of the effective lens unit 70 according to the present embodiment.

  As shown in the figure, the effective lens unit 70 according to the present embodiment includes a holding member 70B having a rectangular shape and a flat plate shape when viewed from the front, which holds the effective lens 70A. A moving coil 70C is provided in the vicinity of the upper end of the holding member 70B, and bearings 70D are provided at both ends of the upper surface of the upper end.

  On the other hand, the effective lens unit 70 is provided with a holding member 70H having a rectangular shape and a flat plate shape when viewed from the front, with a moving coil 70I provided at the center thereof, on the right side of the holding member 70B. In addition, bearings 70J are provided at both ends of the side surface of the holding member 70H at the right end as viewed from the front.

  The effective lens unit 70 includes a shaft 70L corresponding to the bearing 70J and a pair of support portions 70K that support both ends of the shaft 70L. Here, the shaft 70L is fixed by the support portion 70K so that the axial direction thereof coincides with the vertical direction (pitch direction) of the digital camera 10, and the holding member 70H is movable in the pitch direction (V direction in the figure). It is said that.

  On the other hand, a support portion 70E that supports the shaft 70G corresponding to the bearing 70D is fixed to the upper end portion of the side surface of the holding member 70H on the left side when viewed from the front. Here, the shaft 70G is fixed by the support portion 70E so that the axial direction thereof coincides with the front-view left-right direction (yaw direction) of the digital camera 10, and the holding member 70B is in the yaw direction (H direction in the figure). It can be moved.

  The effective lens unit 70 is provided with an N-pole magnet (not shown) near one end of the movable range of the holding member 70B, and an S-pole magnet (not shown) near the other end. Is provided. Therefore, by passing an electric current through the moving coil 70C, the holding member 70B can be moved at a speed corresponding to the magnitude of the electric current in a direction (leftward or rightward as viewed from the front) according to the direction of the electric current. it can.

  The effective lens unit 70 is provided with an N-pole magnet (not shown) near one end of the movable range of the holding member 70H, and an S-pole magnet (not shown) near the other end. Is provided. Therefore, by passing a current through the moving coil 70I, the holding member 70H can be moved at a speed corresponding to the magnitude of the current in a direction (upward or downward) according to the direction in which the current flows.

  Further, by passing a current through both the moving coil 70C and the moving coil 70I, the effective lens 70A can be moved within the range restricted by the movable range of the holding member 70B and the movable range of the holding member 70H in FIG. Can be moved in an arbitrary direction (two-dimensional direction) parallel to.

  In the digital camera 10 according to the present embodiment, when the camera shake correction function is executed, the effective lens 70A is moved in the direction opposite to the direction of camera shake by the mechanism of the effective lens unit 70 as described above.

  The digital camera 10 according to the present embodiment includes a current generator 70X that generates a current to be supplied to the moving coil 70C and the moving coil 70I.

  By the way, in the digital camera 10 according to the present embodiment, when the movement of the effective lens 70A in the direction opposite to the direction of camera shake by the camera shake correction function is started, the axis 70G and the axis 70L are orthogonal to the direction of the movement. Is controlled to vibrate at least one of them. That is, when the direction of camera shake is the yaw direction, the shaft 70G is vibrated in the pitch direction. When the direction of camera shake is the pitch direction, the shaft 70L is vibrated in the yaw direction, and the direction of camera shake is the yaw direction and the pitch direction. In the combined direction, the shaft 70G is vibrated in the pitch direction and the shaft 70L is vibrated in the yaw direction.

  Thereby, the holding member 70B (specifically, the bearing 70D) and the shaft 70G when starting the movement of the effective lens 70A, and the holding member 70H (specifically, the bearing 70J) and the shaft 70L are moved. As a result of changing the friction from static friction to dynamic friction, it is possible to reduce the load due to static friction when the effective lens 70A starts to move.

  At this time, the vibration (hereinafter referred to as “movement assist vibration”) is performed such that the higher the temperature detected by the temperature sensor 62, the larger the amplitude and the higher the vibration speed. As a result, the load due to static friction at the start of movement of the effective lens 70A can be reduced more efficiently.

  As described above, in the digital camera 10 according to the present embodiment, the amplitude and the vibration speed of the movement assist vibration are switched according to the temperature. Therefore, information indicating the relationship between the temperature, the amplitude, and the vibration speed (hereinafter, “ 48A (refer to FIG. 1) is stored in a predetermined area of the memory 48 in advance. In the digital camera 10 according to the present embodiment, the vibration-related information 48A is obtained by moving the effective lens 70A in an environment of various temperatures detected by the temperature sensor 62 through experiments using the actual device of the digital camera 10. However, the present invention is not limited to this. For example, it is detected by the temperature sensor 62 by computer simulation based on the design specifications of the digital camera 10. It goes without saying that other forms such as a form in which a value obtained in advance is applied so that the movement of the effective lens 70A can be performed so as to realize camera shake correction under various temperature environments.

  Next, an overall operation at the time of shooting of the digital camera 10 according to the present embodiment will be briefly described.

  First, the CCD 24 performs imaging through the optical unit 22 and sequentially outputs analog signals for R (red), G (green), and B (blue) indicating the subject image to the analog signal processing unit 26. The analog signal processing unit 26 performs analog signal processing such as correlated double sampling processing on the analog signal input from the CCD 24 and sequentially outputs the analog signal to the ADC 28.

  The ADC 28 converts the R, G, and B analog signals input from the analog signal processing unit 26 into R, G, and B signals (digital image data) each having a predetermined number of bits, and sequentially converts them to the digital signal processing unit 30. Output. The digital signal processing unit 30 accumulates digital image data sequentially input from the ADC 28 in a built-in line buffer and temporarily stores the digital image data directly in a predetermined area of the memory 48.

  The digital image data stored in a predetermined area of the memory 48 is read out by the digital signal processing unit 30 according to the control by the CPU 40, and is subjected to white gain by applying a digital gain for each of R, G, and B according to a predetermined physical quantity. In addition to performing balance adjustment, digital image data having a predetermined number of bits is generated by performing gamma processing and sharpness processing.

  The digital signal processing unit 30 performs YC signal processing on the generated digital image data to generate a luminance signal Y and chroma signals Cr and Cb (hereinafter referred to as “YC signal”), and the YC signal is stored in the memory 48. Is stored in an area different from the predetermined area.

  The LCD 38 is configured to display a moving image (through image) obtained by continuous imaging by the CCD 24 and can be used as a finder. When the LCD 38 is used as a finder, the LCD 38 is generated. The YC signals thus output are sequentially output to the LCD 38 via the LCD interface 36. As a result, a through image is displayed on the LCD 38.

  Here, at the timing when the release switch is half-pressed by the user, after the AE function is activated and the exposure state is set as described above, the AF function is activated and focus control is performed. At this time, the YC signal stored in the memory 48 at that time is compressed in a predetermined compression format (in this embodiment, JPEG format) by the compression / decompression processing circuit 54 and then passed through the external memory interface 50. Then, a picture is taken by recording it as an electronic file (image file) in the memory card 52.

  Next, the operation of the digital camera 10 when the camera shake correction function is executed will be described with reference to FIG. FIG. 4 is a flowchart showing a flow of processing of the photographing processing program executed by the CPU 40 when the execution of the camera shake correction function is set and the photographing mode is set. The program is stored in the memory. It is stored in advance in 48 predetermined areas.

  First, in step 100 in the figure, the process waits until the release switch is half-pressed, and in the next step 102, the AE function and the AF function are executed as described above, and in the next step 104, the release switch is fully turned on. It is determined whether or not the state has been shifted to the pressed state. If the determination is affirmative, the process proceeds to step 108, whereas if the determination is negative, the process proceeds to step 106.

  In step 106, it is determined whether or not the release switch has been released by determining whether or not the release switch has been returned to the position where the release switch has not been pressed. On the other hand, if the determination is negative, the process returns to step 102.

  On the other hand, in step 108, the temperature is detected by the temperature sensor 62, and in the next step 110, the amplitude and vibration speed corresponding to the detected temperature are specified by reading from the vibration related information 48 A of the memory 48, and the next step 112. Then, the direction of camera shake is detected by the camera shake amount detection sensor 60.

  In the next step 114, vibration of at least one of the shaft 70G and the shaft 70L (movement assist vibration) in a direction orthogonal to the direction of camera shake detected by the processing in step 112 is started.

  At this time, as described above, the CPU 40 vibrates the shaft 70G in the pitch direction when the detected camera shake direction is the yaw direction, and vibrates the shaft 70L in the yaw direction when the camera shake direction is the pitch direction. When the direction of camera shake is a direction in which the yaw direction and the pitch direction are combined, the shaft 70G is vibrated in the pitch direction and the shaft 70L is vibrated in the yaw direction. When the shaft 70G is vibrated in the pitch direction, a current is passed through the moving coil 70I so as to vibrate the holding member 70H in the pitch direction, and when the shaft 70L is vibrated in the yaw direction, the holding member 70B is moved in the yaw direction. A current is passed through the moving coil 70C so as to vibrate.

  FIG. 5 shows an example of a waveform of a current flowing through at least one of the moving coil 70C and the moving coil 70I at this time. As shown in the figure, the current passed through at least one of the moving coil 70C and the moving coil 70I so that the higher the temperature detected by the temperature sensor 62, the larger the amplitude and the higher the vibration speed (frequency). Set.

  As a result, as shown in FIG. 6 as an example, the power consumption for movement assist vibration is compared with the case where the amplitude and frequency are fixedly set so as to enable camera shake correction under all environmental temperatures. Can be reduced.

  In the next step 116, in order to perform camera shake correction, the effective lens 70A starts moving in the direction opposite to the direction of camera shake detected by the process in step 112. In the next step 118, the process in step 114 is performed. After stopping the movement assist vibration that has started, photographing is performed in the next step 120.

  In the next step 122, the movement of the effective lens 70A started by the process in step 116 is stopped, and then the main photographing process program is ended.

  As described above in detail, in the present embodiment, when camera shake occurs, a moving member (here, an effective lens) that suppresses problems caused by camera shake by moving in a direction opposite to the direction of camera shake. 70A) and a guide member (here, a shaft 70G and a shaft 70L) that slidably supports the moving member in a direction opposite to the direction of the camera shake, and in a direction opposite to the direction of the camera shake of the moving member When the movement of the moving member is started, the guide member is controlled to vibrate in a direction intersecting the moving direction of the moving member. Therefore, the moving member and the guide member when starting the movement of the moving member are controlled. As a result, the load caused by static friction at the start of movement of the moving member can be reduced.

  In this embodiment, since the direction intersecting the moving direction of the moving member is a direction orthogonal to the moving direction, the load due to static friction at the start of moving the moving member is more reliably reduced. can do.

  In the present embodiment, a power source (in this case, the current generator 70X) for moving the moving member in a direction opposite to the direction of the hand shake is also used as a power source for vibrating the guide member. Therefore, the cost and size of the device can be reduced.

  Further, in the present embodiment, a detection means (in this case, the temperature sensor 62) for detecting the temperature is provided, and control is performed so that the amplitude and vibration speed of the guide member are increased as the temperature becomes higher. The power consumption for vibrating the guide member can be reduced as compared with the case where the amplitude and vibration speed are fixedly set so as to enable camera shake correction under all environmental temperatures.

[Second Embodiment]
In the second embodiment, a description will be given of an example in which a correction is made by moving the CCD 24 in the direction opposite to the direction of camera shake as the camera shake correction function. The configuration of the digital camera 10 according to the present embodiment is the same as that according to the first embodiment except for the CCD unit including the CCD 24 and the mechanism for moving the CCD 24. The configuration of the unit will be described.

  FIG. 7 shows an arrangement position of the CCD unit 72 according to the second embodiment. As shown in the figure, the CCD unit 72 according to the present embodiment is in the vicinity of the back surface in the main body of the digital camera 10 and the center of the imaging surface of the CCD 24 substantially coincides with the optical axes of the plurality of lenses. It is arranged to do.

  FIG. 8 shows a front view of the CCD unit 72 according to the second embodiment.

  As shown in the figure, the CCD unit 72 according to the present embodiment includes a holding member 72B having a rectangular shape and a flat plate shape for holding the CCD 24 when viewed from the front. A moving coil 72C is provided in the vicinity of the upper end of the holding member 72B, and bearings 72D are provided at both ends of the upper surface of the upper end.

  On the other hand, the CCD portion 72 is provided with a holding member 72H having a rectangular shape and a flat plate shape, as viewed from the front, with a moving coil 72I provided at the center, on the right side of the holding member 72B. In addition, bearings 72J are provided at both ends of the side surface of the holding member 72H at the right end as viewed from the front.

  The CCD unit 72 is provided with a shaft 72L corresponding to the bearing 72J and a pair of support portions 72K that support both ends of the shaft 72L. Here, the shaft 72L is fixed by the support portion 72K so that the axial direction thereof coincides with the vertical direction (pitch direction) of the digital camera 10, and the holding member 72H is movable in the pitch direction (V direction in the figure). It is said that.

  On the other hand, a support portion 72E that supports a shaft 72G corresponding to the bearing 72D is fixed to the upper end portion of the side surface of the holding member 72H on the left side when viewed from the front. Here, the shaft 72G is fixed by the support portion 72E so that the axial direction of the shaft 72G coincides with the left-right direction (yaw direction) of the digital camera 10, and the holding member 72B is in the yaw direction (H direction in the figure). It can be moved.

  The CCD unit 72 is provided with an N-pole magnet (not shown) near one end of the movable range of the holding member 72B, and an S-pole magnet (not shown) near the other end. It has been. Therefore, by passing an electric current through the moving coil 72C, the holding member 72B can be moved at a speed corresponding to the magnitude of the electric current in a direction (a left direction or a right direction when viewed from the front) according to the direction of the electric current. it can.

  The CCD unit 72 is provided with an N-pole magnet (not shown) near one end of the movable range of the holding member 72H, and an S-pole magnet (not shown) near the other end. It has been. Therefore, by passing a current through the moving coil 72I, the holding member 72H can be moved in a direction (upward or downward) according to the direction in which the current flows at a speed according to the magnitude of the current.

  Furthermore, by supplying current to both the moving coil 72C and the moving coil 72I, the CCD 24 is parallel to the paper surface of FIG. 8 within the range restricted by the movable range of the holding member 72B and the movable range of the holding member 72H. Can be moved in any arbitrary direction (two-dimensional direction).

  In the digital camera 10 according to the present embodiment, when the camera shake correction function is executed, the CCD 24 is moved in the direction opposite to the direction of camera shake by the mechanism of the CCD unit 72 as described above.

  The digital camera 10 according to the present embodiment includes a current generator 72X that generates a current to be supplied to the moving coil 72C and the moving coil 72I.

  The operation of the digital camera 10 in the case of executing the camera shake correction function according to the second embodiment is substantially the same as that of the digital camera 10 according to the first embodiment, but the photographing shown in FIG. The difference from the first embodiment is that the part to be processed in the processing program is the CCD unit 72 instead of the effective lens unit 70.

  Also in this case, the same effects as those of the first embodiment can be obtained.

[Third Embodiment]
In the third embodiment, a description will be given of an example of a case where a correction is made by moving the focus lens in the direction opposite to the direction of camera shake as the camera shake correction function. The configuration of the digital camera 10 ′ according to the present embodiment is the same as that according to the first and second embodiments except for the focus lens including a focus lens and a mechanism for moving the focus lens. Therefore, the configuration of the focus lens unit will be described below.

  FIG. 9 shows an arrangement position of the focus lens unit 74 according to the third embodiment. As shown in the figure, the focus lens unit 74 according to the present embodiment is disposed slightly on the rear side in the main body of the digital camera 10 '.

  FIG. 10 is a front view of the focus lens unit 74 according to the third embodiment.

  As shown in the figure, the focus lens unit 74 according to the present embodiment includes a holding member 74B having a rectangular shape and a flat plate shape when viewed from the front, which holds the focus lens 74A. A moving coil 74C is provided in the vicinity of the upper end of the holding member 74B, and bearings 74D are provided at both ends of the upper surface of the upper end.

  On the other hand, the focus lens unit 74 is provided with a holding member 74H having a rectangular shape and a flat plate shape in the front view, in which the moving coil 74I is provided at the center, on the right side of the holding member 74B. In addition, bearings 74J are provided at both ends of the side surface of the holding member 74H at the right end in front view.

  The focus lens unit 74 includes a shaft 74L corresponding to the bearing 74J and a support portion 74M that supports both ends of the shaft 74L. Here, the shaft 74L is fixed by the support portion 74M so that the axial direction thereof coincides with the vertical direction (pitch direction) of the digital camera 10 ', and the holding member 74H moves in the pitch direction (V direction in the figure). It is possible.

  On the other hand, a support portion 74E that supports a shaft 74G corresponding to the bearing 74D is fixed to the upper end portion of the side surface of the holding member 74H at the left end portion when viewed from the front. Here, the shaft 74G is fixed by the support portion 74E so that the axial direction thereof coincides with the left-right direction (yaw direction) in front view of the digital camera 10 ′, and the holding member 74B is in the yaw direction (H direction in the figure). It is possible to move to.

  The focus lens unit 74 is provided with an N-pole magnet (not shown) near one end of the movable range of the holding member 74B, and an S-pole magnet (not shown) near the other end. Is provided. Therefore, by passing an electric current through the moving coil 74C, the holding member 74B can be moved at a speed corresponding to the magnitude of the electric current in a direction (leftward or rightward as viewed from the front) according to the direction in which the electric current flows. it can.

  The focus lens portion 74 is provided with an N-pole magnet (not shown) near one end of the movable range of the holding member 74H, and an S-pole magnet (not shown) near the other end. Is provided. Therefore, by passing a current through the moving coil 74I, the holding member 74H can be moved at a speed corresponding to the magnitude of the current in a direction (upward or downward) according to the direction in which the current flows.

  Further, by supplying current to both the moving coil 74C and the moving coil 74I, the focus lens 74A can be moved within the range restricted by the movable range of the holding member 74B and the movable range of the holding member 74H in FIG. Can be moved in an arbitrary direction (two-dimensional direction) parallel to.

  In the digital camera 10 ′ according to the present embodiment, when the camera shake correction function is executed, the focus lens 74 </ b> A is moved in the direction opposite to the direction of camera shake by the mechanism of the focus lens unit 74 as described above.

  Here, in the vicinity of the upper end portion of the support portion 74M of the focus lens portion 74, the focus lens 74A is placed in the direction parallel to the optical axis of the focus lens 74A, which is a direction orthogonal to both the shaft 74G and the shaft 74L. A hole 74N into which a screw (not shown) for moving in the direction is screwed is formed.

  In the digital camera 10 ′ according to the third embodiment, the screw is connected to a rotation shaft of a focus adjustment motor (not shown), and the movement of the focus lens 74A when the AF function is activated is controlled by the focus adjustment motor. It is supposed to be performed by rotating.

  The digital camera 10 ′ according to the present embodiment includes a moving coil 74 </ b> C and a moving coil 74 </ b> I, and a current generator 74 </ b> X that generates a current to be supplied to the focus adjustment motor.

  The operation of the digital camera 10 ′ when executing the camera shake correction function according to the third embodiment is substantially the same as that of the digital camera 10 according to the first embodiment, but is shown in FIG. The point to be processed in the imaging processing program is the focus lens unit 74 instead of the effective lens unit 70, and the point that the vibration source of the movement assist vibration is the support unit 74M is different from the first embodiment.

  Also in this case, the same effects as those of the first embodiment can be obtained.

[Fourth Embodiment]
In the fourth embodiment, a description will be given of an example in the case of applying a correction by moving the zoom lens in a direction opposite to the direction of camera shake as the camera shake correction function. The configuration of the digital camera 10 'according to the present embodiment is the same as that according to the first and second embodiments except for the zoom lens unit including a zoom lens and a mechanism for moving the zoom lens. In the following, the configuration of the zoom lens unit will be described.

  FIG. 11 shows an arrangement position of the zoom lens unit 76 according to the fourth embodiment. As shown in the figure, the zoom lens portion 76 according to the present embodiment is disposed in the vicinity of the front surface portion in the apparatus main body of the digital camera 10 ′.

  FIG. 12 is a front view of the zoom lens unit 76 according to the fourth embodiment.

  As shown in the figure, the zoom lens unit 76 according to the present embodiment includes a holding member 76B having a rectangular shape and a flat plate shape when viewed from the front, which holds the zoom lens 76A. A moving coil 76C is provided in the vicinity of the upper end of the holding member 76B, and bearings 76D are provided at both ends of the upper surface of the upper end.

  On the other hand, the zoom lens portion 76 is provided with a holding member 76H having a rectangular shape and a flat plate shape with a moving coil 76I provided at the center thereof on the right side of the holding member 76B. In addition, bearings 76J are provided at both ends of the side surface of the holding member 76H at the right end in front view.

  The zoom lens portion 76 includes a shaft 76L corresponding to the bearing 76J and a support portion 76K that supports both ends of the shaft 76L. Here, the shaft 76L is fixed by the support portion 76K so that the axial direction thereof coincides with the vertical direction (pitch direction) of the digital camera 10 ′, and the holding member 76H moves in the pitch direction (V direction in the figure). It is possible.

  On the other hand, a support portion 76E that supports the shaft 76G corresponding to the bearing 76D is fixed to the upper end portion of the side surface of the holding member 76H at the left end portion when viewed from the front. Here, the shaft 76G is fixed by the support portion 76E so that the axial direction thereof coincides with the front view left-right direction (yaw direction) of the digital camera 10, and the holding member 76B is in the yaw direction (H direction in the figure). It can be moved.

  The zoom lens unit 76 is provided with an N-pole magnet (not shown) near one end of the movable range of the holding member 76B, and an S-pole magnet (not shown) near the other end. Is provided. Therefore, by passing a current through the moving coil 76C, the holding member 76B can be moved at a speed corresponding to the magnitude of the current in a direction (leftward or rightward as viewed from the front) according to the current flow direction. it can.

  The zoom lens unit 76 is provided with an N-pole magnet (not shown) near one end of the movable range of the holding member 76H, and an S-pole magnet (not shown) near the other end. Is provided. Therefore, by passing a current through the moving coil 76I, the holding member 76H can be moved at a speed corresponding to the magnitude of the current in a direction (upward or downward) according to the direction in which the current flows.

  Further, by supplying current to both the moving coil 76C and the moving coil 76I, the zoom lens 76A can be moved within the range restricted by the movable range of the holding member 76B and the movable range of the holding member 76H in FIG. Can be moved in an arbitrary direction (two-dimensional direction) parallel to.

  In the digital camera 10 ′ according to the present embodiment, when the camera shake correction function is executed, the zoom lens 76 </ b> A is moved in the direction opposite to the direction of camera shake by the mechanism of the zoom lens unit 76 as described above.

  Here, the support portion 76K of the zoom lens portion 76 moves in the optical axis direction of the zoom lens 76A, which is a direction orthogonal to both the shaft 76G and the shaft 76L, in conjunction with the rotation of a zoom motor (not shown). It is said that.

  The digital camera 10 ′ according to the present embodiment includes a moving coil 76 </ b> C and a moving coil 76 </ b> I and a current generator 76 </ b> X that generates a current to be supplied to the zoom motor.

  The operation of the digital camera 10 'when performing the camera shake correction function according to the fourth embodiment is substantially the same as that of the digital camera 10 according to the first embodiment, but is shown in FIG. The part to be processed in the imaging processing program is the zoom lens unit 76 instead of the effective lens unit 70, and is different from the first embodiment in that the vibration assisting vibration source is the support unit 76K.

  Also in this case, the same effects as those of the first embodiment can be obtained.

  In each of the above embodiments, the case where the amplitude and the vibration speed of the movement assist vibration are set according to the temperature inside the main body of the digital camera has been described, but the present invention is not limited to this, for example, Instead of the temperature, a mode in which the amplitude and vibration speed of the movement auxiliary vibration are set according to humidity, or a mode in which the amplitude and vibration speed of the movement auxiliary vibration are set in accordance with both the temperature and humidity can be used.

  In the embodiment in which the amplitude and the vibration speed of the movement assist vibration are set according to the humidity instead of the temperature, a humidity sensor is provided in the digital camera instead of the temperature sensor 62, and the movement is performed according to the humidity detected by the humidity sensor. The amplitude and vibration speed of the auxiliary vibration are set. In this case, information indicating the relationship between humidity, amplitude, and vibration speed is applied as the vibration-related information 48A. In this case, as the humidity increases, the amplitude and vibration speed are increased.

  Further, in the embodiment in which the amplitude and the vibration speed of the movement assist vibration are set according to both the temperature and the humidity, a humidity sensor is provided in the digital camera in addition to the temperature sensor 62, and the temperature detected by the temperature sensor 62 and the humidity The amplitude and vibration speed of the movement assist vibration are set according to the combination of the humidity detected by the sensor. In this case, information indicating the relationship between the combination of temperature and humidity, amplitude, and vibration speed is applied as the vibration-related information 48A. In this case, the amplitude and the vibration speed are increased as the temperature is increased, and the amplitude and the vibration speed are increased as the humidity is increased.

  In these cases, the same effects as those of the above embodiments can be obtained.

  In each of the above embodiments, the case where both the amplitude and the vibration speed of the movement assist vibration are switched according to the temperature has been described. However, the present invention is not limited to this, for example, according to the temperature. Only one of the amplitude and the vibration speed can be switched. Also in this case, substantially the same effects as those of the above embodiments can be obtained.

  In each of the above-described embodiments, the case where the direction orthogonal to the moving direction of the member that moves for correcting camera shake is applied as the vibration direction of the movement assist vibration has been described, but the present invention is limited to this. For example, as a vibration direction of the movement assist vibration, a direction that intersects the movement direction of the member that moves for hand shake correction (excluding the orthogonal direction) may be applied. Also in this case, substantially the same effects as those of the above embodiments can be obtained.

  Further, although cases have been described with the above embodiments where the present invention is applied to a digital camera, the present invention is not limited to this, and other devices having a photographing function, such as a mobile phone and a PDA, for example. It can also be set as the form applied to. Also in this case, the same effects as those of the above embodiments can be obtained.

  In addition, the configuration of the digital camera according to each of the above-described embodiments (see FIGS. 1 to 3 and FIGS. 7 to 12) is an example, and can be appropriately changed without departing from the gist of the present invention. Needless to say.

  Furthermore, the flow of processing of the photographing processing program described in each of the above embodiments (see FIG. 4) is also an example, and within the scope that does not depart from the gist of the present invention, the processing order of each step is changed and the processing content is changed. It goes without saying that changes, deletion of unnecessary steps, addition of new steps, and the like can be performed.

It is a block diagram which shows the principal part structure of the electric system of the digital camera which concerns on embodiment. It is a fracture side view showing the composition of the digital camera concerning a 1st embodiment. It is a front view which shows the structure of the effective lens part which concerns on 1st Embodiment. It is a flowchart which shows the flow of a process of the imaging | photography processing program which concerns on embodiment. It is a graph with which it uses for description of the movement assistance vibration performed in the digital camera which concerns on embodiment. It is another graph with which it uses for description of the movement assistance vibration performed in the digital camera which concerns on embodiment. It is a fracture | rupture side view which shows the structure of the digital camera which concerns on 2nd Embodiment. It is a front view which shows the structure of the CCD part which concerns on 2nd Embodiment. It is a fracture | rupture side view which shows the structure of the digital camera which concerns on 3rd Embodiment. It is a front view which shows the structure of the focus lens part which concerns on 3rd Embodiment. It is a fracture | rupture side view which shows the structure of the digital camera which concerns on 4th Embodiment. It is a front view which shows the structure of the zoom lens part which concerns on 4th Embodiment.

Explanation of symbols

10, 10 'digital camera 24 CCD (moving member)
40 CPU (control means)
70 Effective lens portion 70A Effective lens (moving member)
70B holding member 70G, 70L shaft (guide member)
70H Holding member 70X Current generator (power source)
72 CCD section 72B Holding member 72G, 72L Shaft (guide member)
72H Holding member 72X Current generator (power source)
74 Focus lens unit 74A Focus lens (moving member)
74B Holding member 74G, 74L Shaft (guide member)
74H Holding member 74X Current generator (power source)
76 Zoom lens unit 76A Zoom lens (moving member)
76B Holding member 76G, 76L Shaft (guide member)
76H Holding member 76X Current generator (power source)

Claims (6)

A moving member that suppresses a malfunction caused by the camera shake by moving in a direction opposite to the direction of the camera shake when the camera shake has occurred;
A guide member that slidably supports the moving member in a direction opposite to the direction of the camera shake;
Control means for controlling the guide member to vibrate in a direction intersecting the moving direction of the moving member when starting the movement of the moving member in the direction opposite to the direction of the hand movement;
Camera shake correction device with The camera shake correction apparatus according to claim 1, wherein the direction intersecting the moving direction of the moving member is a direction orthogonal to the moving direction. The camera shake correction apparatus according to claim 1, wherein a power source for moving the moving member in a direction opposite to the direction of the camera shake is also used as a power source for vibrating the guide member. A detection means for detecting at least one of temperature and humidity;
When the temperature is detected by the detecting means, the control means increases at least one of the vibration amplitude and vibration speed of the guide member as the temperature increases, and when the humidity is detected by the detecting means, the control means The camera shake correction apparatus according to any one of claims 1 to 3, wherein control is performed such that at least one of an amplitude and a vibration speed of the guide member increases as the humidity increases. An imaging apparatus comprising the camera shake correction apparatus according to any one of claims 1 to 4,
The moving member is at least one of a solid-state imaging device that captures a subject image and at least a part of an imaging optical system that forms the subject image on the solid-state imaging device. A moving member that suppresses a problem caused by the camera shake by moving in the direction opposite to the direction of the camera shake when the camera shake occurs, and a guide that supports the moving member so as to be slidable in the direction opposite to the direction of the camera shake. A movement assisting method for assisting movement of the moving member in a camera shake correction device comprising:
A movement assisting method for controlling the guide member to vibrate in a direction crossing the moving direction of the moving member when the moving member starts moving in the direction opposite to the direction of the hand movement.

Images