JP2013029666A - Camera image blurring correction device and operation control method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform blurring correction in a horizontal direction and blurring correction in a vertical correction in parallel.SOLUTION: In a camera image blurring correction device, a CPU 101 and a CPU 111 are mounted in a V direction vibration-proof control CPU board 59 and a H direction vibration-proof control CPU board 60, respectively, the CPU boards being independent of each other. Correction of a vibration-proof lens in the vertical direction is controlled by the CPU 101 mounted in the board 59, while correction of a vibration-proof lens in the horizontal direction is controlled by the CPU 111 mounted in the board 60. Since the corrections in different directions are performed by the CPU boards 59, 60 which are mutually independent, respectively, the blurring correction in the horizontal direction and the blurring correction in the vertical direction can be performed in parallel.

Description

  The present invention relates to an image blur correction device for a camera and an operation control method thereof.

  Some lenses provided with a shake detection sensor are provided with separate gyro sensors on two substrates (Patent Document 1). A shake in the first direction is detected by one gyro sensor, and a shake in the second direction is detected by the other gyro sensor. In addition, there are those having a function of turning on / off camera shake correction in the X direction and the Y direction (Patent Document 2), and those having a shake detection circuit in the X direction and the Y direction (Patent Document 3). There is also a device that prevents noise from being mixed due to power shortage of the TV lens device (Patent Document 4).

JP 2007-271664 A Japanese Patent Laid-Open No. 10-108062 JP 2007-218976 A Japanese Patent Laid-Open No. 7-99599

  The lens has many controls such as focus lens control, zoom lens control, and aperture control. To perform many of these controls at the same time, it is conceivable that a plurality of boards on which control circuits are mounted are prepared, and each board controls each of the cameras. As described above, when it is attempted to control the camera by using a plurality of substrates on which the control circuit is mounted, in order to efficiently manufacture the substrate, it is conceivable that the substrates have the same structure. When the structure of multiple substrates is the same, it is necessary to be able to perform any kind of camera control on any substrate, so the processing capability is high so that the most burdensome lens control can be performed. It is necessary to use a substrate. Even a substrate that performs control with a small load is wasteful because a substrate with high processing capability is used.

  To increase the processing capacity of all the substrates so that processing of a large load can be performed on any of the plurality of substrates in order to share multiple substrates, the circuit scale of the device that controls the camera increases. This will increase costs. There is a risk that the cost and merit due to the common use of multiple boards will be lost.

  In the present invention, when camera control is performed on each of a plurality of substrates, even when the substrates are shared, the processing capacity of the substrates does not increase, and the circuit scale of the camera control device does not increase. The purpose is to do.

  In the camera shake correction apparatus according to the present invention, a control circuit is mounted on each of a plurality of independent substrates, and at least two or more substrates have the same structure. A plurality of substrates connected by lines, a first sensor for detecting image blur in the horizontal direction of the imaging optical system of the camera, and a first correction for correcting the image blur in the horizontal direction detected by the first sensor. A plurality of devices, a second sensor for detecting image blur in the vertical direction of the imaging optical system of the camera, and a second correction device for correcting image blur in the vertical direction detected by the second sensor. The first correction device is controlled to correct the image blur in the horizontal direction detected by the first sensor using a first control circuit mounted on the first substrate among the first substrates. The second correction device is configured to correct the image blur in the vertical direction detected by the second sensor using a second control circuit mounted on the second substrate among the plurality of substrates. It is something to control.

  The present invention also provides an operation control method suitable for the image blur correction device for the camera. That is, in this method, a control circuit is mounted on each of a plurality of independent substrates, and the structure of at least two or more substrates is the same, and the substrates are connected by a network line. The first sensor detects horizontal image blur of the imaging optical system of the camera, the first correction device corrects horizontal image blur detected by the first sensor, and the second The second sensor detects a vertical image blur of the imaging optical system of the camera, and the second correction device corrects the vertical image blur detected by the second sensor. The first correction device is controlled to correct the image blur in the horizontal direction detected by the first sensor using the first control circuit mounted on the first board, and the plurality of the plurality of The second substrate out of the substrate And it controls the second correcting device to correct the image blur of the detected vertical direction by the second sensor with a second control circuit mounted on.

  According to the present invention, a control circuit is mounted on each of a plurality of independent boards (a plurality of separate boards are detachable), and the boards are connected by a network line (bus connection). Yes. The first correction device is controlled to correct the image blur in the horizontal direction detected by the first sensor using the first control circuit mounted on the first substrate among the plurality of substrates. The second correction device is controlled so as to correct the image blur in the vertical direction detected by the second sensor using the second control circuit mounted on the second substrate among the substrates.

  As described above, when a plurality of substrates are used in common with a plurality of substrates to control each of the plurality of cameras, it is necessary to use a substrate having a high processing capability so that the most burdensome lens control can be performed. Among a number of camera controls, shake correction can be cited as one of the high-load controls. Since shake correction includes vertical shake correction and horizontal shake correction, in order to deal with these corrections with a single substrate, the processing capability of the substrate must be increased. In order to use a plurality of substrates in common, a substrate having a high processing capability capable of correcting both the shake correction in the vertical direction and the shake correction in the horizontal direction is required. If the substrate is used in common and camera control is performed with a plurality of substrates, the circuit scale becomes large. According to the present invention, the shake correction is divided into the vertical shake correction and the horizontal shake correction, and each is controlled by a separate substrate, so that the shake correction can be realized even for a substrate with low processing capability. A plurality of cameras can be controlled by using a plurality of substrates that have a low processing capacity and are shared. Since the circuit scale of the device for controlling the camera can be reduced, the merit of using a common substrate can be maintained.

  A third sensor for detecting a rotational deviation of the imaging optical system of the camera, and a third correction device for correcting the rotational deviation detected by the third sensor; You may make it control the said 3rd correction | amendment apparatus so that the rotation shift detected by the said 3rd sensor may be corrected using the 3rd control circuit mounted in the board | substrate.

  A process for controlling the first correction device so as to correct the image blur in the horizontal direction using the first control circuit mounted on the first board; and a process mounted on the second board. It is preferable that the process of controlling the second correction device so as to correct the image blur in the vertical direction using the second control circuit is performed in parallel.

2 shows an optical configuration of a taking lens unit. The state which looked at the anti-vibration lens from the front is shown. It is a disassembled perspective view of a voice coil motor. It is a block diagram which shows the electrical structure of a photographic lens unit. It is a block diagram which shows the electrical structure of a V direction image stabilization control CPU board and an H direction image stabilization control CPU board. The data frame structure is shown. It is a flowchart which shows a focus process sequence. It is a flowchart which shows an iris process sequence. 5 is a flowchart showing a zoom processing procedure, a V-direction image stabilization processing procedure, and an H-direction image stabilization processing procedure. It is a time chart which shows V direction image stabilization processing and H direction image stabilization processing. It is a flowchart which shows an indicator control processing procedure. It is a flowchart which shows a camera communication processing procedure. It is a block diagram which shows the electrical structure of a photographic lens unit.

  FIG. 1A shows an embodiment of the present invention, and shows an optical configuration of a photographing lens unit 1 mounted on a broadcast television camera or the like.

  A focus lens 2, a zoom lens 3, an iris 4 and a relay lens 5 are provided so that the optical axis O of the photographing lens unit 1 passes through the center. Further, the anti-vibration lens 6 is attached to the photographing lens unit 1 by the anti-vibration lens frame 7 so that the optical axis O passes through the center. As will be described in detail later, the anti-vibration lens 7 is movable in the Y direction (vertical direction) by the voice coil motor 8 and can correct the shake in the Y direction. Further, the anti-vibration lens 7 is also movable in the X direction (horizontal direction) and can correct the shake in the X direction.

  Further, the photographing lens unit 1 is provided with a first prism 9 and a second prism 10. Each of the first prism 9 and the second prism 10 is a Pechan prism.

  FIG. 1B shows the first prism 9.

  The first prism 9 has two triangular prisms 9A and 9B arranged to face each other with a slight air layer. The light incident on the first triangular prism 9A is reflected by the surface A1, then reflected by the surface A2, exits from the surface A1, and exits to the air layer H. The light emitted to the air layer H is incident on the surface B1 of the second triangular prism 9B, is reflected by the surface B2, is further reflected by the surfaces B3 and B1, and is emitted from the surface B2. At this time, the light is emitted along the optical axis O.

  As described above, the first prism 9 constituted by the Pechan prism reflects the light incident along the optical axis O five times and emits it along the optical axis O. Since this reflection is an odd number of times, the subject image is inverted.

  The optical path length of the first prism 9 is formed to be the same as the optical path length of the color separation prism 31 built in the camera body 30.

  The second prism 10 has the same configuration as the first prism 9, and the center passes through the optical axis O.

  Referring to FIG. 1A, the subject image inverted by the first prism 9 is further inverted by the second prism 10, so that the subject image formed by the second prism 10 becomes an erect image.

  In this embodiment, the first prism 9 is fixed to the photographing lens unit 1 by a holding frame (not shown), and the second prism 10 is attached to the photographing lens unit 1 by a prism holding frame 20.

  The prism holding frame 20 is formed in a cylindrical shape, and the second prism 10 is fixed to the inner periphery thereof. The prism holding frame 20 is supported by a bearing 21 so as to be rotatable around the optical axis O. A gear 22 is formed on the outer periphery of the prism holding frame 20. A driving gear 24 is engaged with the gear 22. The drive gear 24 is fixed to the output shaft of the prism rotation drive motor 23, and rotates forward and backward by driving the prism rotation drive motor 23. As the drive gear 24 rotates, the prism holding frame 20 rotates and the second prism 10 rotates around the optical axis O.

  Further, the photographic lens unit 1 is provided with relay lenses 11 and 12 after the second prism 10.

  A camera body 30 is attached to the photographing lens unit 1 shown in FIG.

  The camera body 30 includes a color separation prism 31. The color separation prism 31 decomposes an incident light component into a red light component, a green light component, and a blue light component and emits them. The red light component emitted from the color separation prism 31 is incident on the first imaging CCD 32R, the green light component is incident on the second imaging CCD 32G, and the blue light component is incident on the third imaging CCD 32B.

  The imaging unit lens 1 includes a first AF CCD having an optical distance slightly shorter than the optical distance of light incident on the first imaging CCD 32R, the second imaging CCD 32G, and the third imaging CCD 32B. And a second AF CCD (both not shown) having a slightly longer optical distance. An AF evaluation value (contrast) is obtained by extracting a high frequency component from the video signal obtained from the first AF CCD and the second AF CCD. Two graphs representing the relationship between the obtained AF evaluation value and the position of the focus lens 2 are generated. The intersection of the generated graphs is the in-focus position, and in auto focus, the focus lens 2 is positioned so as to be the in-focus position (Precision Focus).

  FIG. 2 shows the anti-vibration lens 6 as viewed from the front.

  A voice coil motor 8 that displaces the image stabilizing lens 6 held by the holding frame 7 in the vertical direction is disposed below the holding frame 7 of the image stabilizing lens 6. On the right side of the holding frame 7 of the anti-vibration lens 6, a voice coil motor 8A that displaces the anti-vibration lens 6 held by the holding frame 7 in the left-right direction is disposed.

  FIG. 3 is an exploded perspective view of the voice coil motor 8.

  The voice coil motor 8 is configured by arranging a coil 202 wound around a coil frame 200 in a magnetic circuit 204. The coil frame 200 is formed of a coil winding part 200A in which a hollow part 200C is formed and a coupling part 200B. A coil 202 is wound around the outer periphery of the coil winding part 200A, and an air-core coil is a coil. It is arranged on the frame 200.

  The magnetic circuit 204 includes two yokes 206 and 208 formed in two U-shapes. Of the parallel portions 206A, 206B, 208A, 208B formed in parallel to the yokes 206, 208, plate-like permanent magnets 210, 212 are fixed to the inner surfaces of the parallel portion 206A and the parallel portion 208A, respectively. As a result, a magnetic field is generated in the gaps 206C and 208C inside the yokes 206 and 208, respectively. For example, the exposed surface side of the permanent magnet 210 exposed in the gap 206C of the yoke 206 is the S pole, and the inner surface of the parallel portion 206B that faces the exposed surface of the permanent magnet 210 is the N pole. In the portion 206C, a magnetic field is generated in the direction from the inner surface of the parallel portion 206B to the exposed surface of the permanent magnet 210.

  Similarly, the exposed surface side of the permanent magnet 212 exposed in the gap 208C of the yoke 208 is the S pole, and the inner surface of the parallel portion 208B facing the exposed surface of the permanent magnet 212 is the N pole. In the gap 208C, a magnetic field is generated in a direction from the inner surface of the parallel portion 208B to the exposed surface of the permanent magnet 212.

  The coil winding part 210A of the coil frame 210 is inserted into the gaps 206C and 208C of the yokes 206 and 208 so that the parallel parts 206B and 208B of the yokes 206 and 208 are fitted into the hollow part 210C. The coil 202 wound around the winding portion 200A is disposed in the magnetic field generated in each of the gap portions 206C and 208C. Accordingly, when a current is passed through the coil 202, a vertical thrust is generated in the coil 202 according to Fleming's left-hand rule, and the coil frame 200 moves in the vertical direction.

  In this way, the vibration correction lens 6 held on the holding frame 7 by the voice coil motor 8 is moved in the vertical direction (Y direction), thereby correcting the shake in the vertical direction (Y direction). The shake correction in the horizontal direction (X direction) can be performed by moving the anti-vibration lens 6 held in the holding frame 7 by the motor 8A in the horizontal direction (X direction).

  Referring to FIG. 2, a through hole 220 is formed in the connecting portion 200 </ b> B of the coil frame 200. A pin 222 fixed to the holding frame 7 of the vibration-proof lens 6 enters the long hole 220. As a result, the holding frame 7 is connected to the coil frame 200 so as to be movable in the left-right direction. The guide shaft 226 is passed through the through holes of the protrusions 224 formed on both side surfaces of the coil frame 200. The coil frame 200 is supported so as to be movable in the vertical direction along the guide shaft 226. When the coil frame 200 is moved in the vertical direction by the voice coil motor 8, the anti-vibration lens 6 is moved in the vertical direction (vertical direction).

  The voice coil motor 8A that drives the vibration-proof lens 8 in the left-right direction has the same structure as the voice coil motor 8. It will be understood that the anti-vibration lens 6 can be moved in the left-right direction (horizontal direction) by the voice coil motor 8A.

  FIG. 4 is a block diagram showing an electrical configuration of the photographic lens unit 1.

  The photographic lens unit 1 includes a large number of CPU boards 51-62 (which are detachable from each other) that are independent (separate boards). A CPU is mounted on each of the CPU boards 51-62. Among these CPU boards 51-62, at least two or more boards have the same structure, and the boards are made common. The cost is reduced by the common use of the substrate. In the conventional photographing lens unit 1, since a large number of processes are controlled by one CPU, a large number of processes cannot be performed in parallel, but in this embodiment, a CPU is mounted on each substrate. Therefore, a large number of processes can be performed simultaneously by simultaneously driving the CPUs mounted on the respective substrates.

  Image data from the camera body 30 and various signals from the virtual system 40 that performs CG (computer graphic) processing are input to the CPU board 55 via an RS232C cable or the like.

  The zoom request signal and the focus request signal given to the photographic lens unit 1 are given to the zoom request CPU board 51 and the focus request CPU board 52, respectively. The taking lens unit 1 is provided with various switches 71 and 72, and switch signals from these various switches 71 and 72 are given to the switch control CPU board 53. Further, the photographing lens unit 1 is provided with display devices 73, 74 and the like, and these display devices 73, 74 are controlled by the display control CPU board 54.

  The zoom request CPU board 51 and the focus request CPU board 52, the focus request CPU board 52 and the switch control board 53, the switch control CPU board 53 and the display control CPU board 54, and the zoom request CPU board 51 and the CPU board 55 are respectively network lines. Connected (bus connection).

  The zoom request CPU board 51 receives a given zoom request signal and transmits it to another board. The focus request CPU board 52 receives a given focus request signal and transmits it to another board. The switch control CPU board 53 performs switch control based on signals from the various switches 71 and 72. The display control CPU board 54 controls the display of the display devices (indicators) 73 and 74.

  Further, the CPU board 55 and zoom control CPU board 56, the zoom control CPU board 56 and focus control CPU board 57, the focus control CPU board 57 and iris control CPU board 58, the iris control CPU board 58 and the V direction control CPU board 59, V Direction control CPU board 59 and H direction control CPU board 60, H direction control CPU board 60 and rotation deviation control CPU board 61, rotation deviation control CPU board 61 and PF unit CPU board 62, PF unit CPU board 62 and additional control CPU board 64 and additional control CPU boards 63 and 64 are also connected by network lines.

  A zoom motor 81 and a position sensor 82 for driving the zoom lens 3 are connected to the zoom control CPU board 56. The zoom control CPU board 56 drives the zoom motor 81 to control the zoom lens 3 so that the zoom amount of the zoom lens 3 is detected by the position sensor 82 and the desired zoom amount is obtained.

  A focus motor 83 and a position sensor 84 for driving the focus lens 2 are connected to the focus control CPU board 57. The focus control CPU board 57 detects the position of the focus lens 2 by the position sensor 84 so that the position is the designated position for manual focus and the calculated focus position for auto focus. The focus motor 83 is driven and the focus lens 2 is controlled.

  An iris motor 85 and a position sensor 86 for driving the iris 4 are connected to the iris control CPU board 58. The iris value of the iris 4 is detected by the position sensor 86, and the iris motor 85 is driven and the iris 4 is controlled by the iris control CPU board 58 so that the desired iris value is obtained.

  The above-described voice coil motor 8 and angular velocity sensor 88 are connected to the V direction image stabilization control CPU board 59. The angular velocity sensor 88 detects vertical shake, and the V-direction image stabilization control CPU board 59 controls the voice coil motor 8 so as to correct the detected vertical shake.

  The voice coil motor 8A and the angular velocity sensor 90 described above are connected to the H direction image stabilization control CPU board 60. The angular velocity sensor 90 detects horizontal shake and the H-direction image stabilization control CPU board 60 controls the voice coil motor 8A so as to correct the detected horizontal shake.

  The above-described prism rotation drive motor 23 and angular velocity sensor 92 are connected to the rotation deviation control CPU board 61. The rotational deviation described above is detected by the angular velocity sensor 92, and the prism rotational drive motor 23 is controlled by the rotational deviation control CPU board 61 so as to correct the detected rotational deviation.

  As described above, the PF unit CPU board 62 includes the AF evaluation value obtained from the first AF CCD and the second AF CCD provided in the photographing lens unit 1 and the position of the focus lens 2. Two graphs representing the relationship between the two are generated, and the in-focus position which is the intersection is calculated.

  The additional control CPU boards 63 and 64 are used when the photographing lens unit 1 performs additional control.

  FIG. 5 is a block diagram showing the electrical configuration of the V-direction image stabilization control CPU board 59 and the H-direction image stabilization control CPU board 60.

  As described above, the CPU 101 for controlling the shake correction in the vertical direction of the image stabilizing lens 6 is mounted on the V direction image stabilization control CPU board 59.

  When the angular velocity sensor 88 detects the amount of shake in the vertical direction, the detection signal is input to the analog / digital conversion circuit 105 via the amplifier circuit 104. Data representing the shake amount in the vertical direction converted by the analog / digital conversion circuit 105 is input to the CPU 101. From the data representing the vertical shake amount, the CPU 101 calculates vertical drive data so as to cancel the vertical shake amount. The calculated vertical driving data is converted into an analog control signal in the digital / analog conversion circuit 102. The converted analog control signal is supplied to the driver 103, whereby the voice coil motor 8 is controlled. The amount of shake in the vertical direction is corrected.

  On the H direction image stabilization control CPU board 60, a CPU 111 for controlling the shake correction in the horizontal direction of the image stabilization lens 6 is mounted.

  When the angular velocity sensor 90 detects a horizontal shake amount, the detection signal is input to the analog / digital conversion circuit 115 via the amplifier circuit 114. Data representing the vertical shake amount converted by the analog / digital conversion circuit 115 is input to the CPU 111. From the data representing the horizontal shake amount, horizontal drive data is calculated by the CPU 111 so as to cancel the horizontal shake amount. The calculated horizontal driving data is converted into an analog control signal by the digital / analog conversion circuit 112. The converted analog control signal is supplied to the driver 113, whereby the voice coil motor 8A is controlled. The amount of shake in the horizontal direction is corrected.

  Similarly to the V-direction image stabilization control CPU board 59 and the H-direction image stabilization control CPU 60, the rotation deviation control CPU board 61 also detects the amount of deviation in the rotation direction by the angular velocity sensor 23, and the detected signal is transmitted via the amplifier circuit. Data that is input to the analog / digital conversion circuit and is converted by the analog / digital conversion circuit and that represents the amount of shift in the rotation direction is input to the CPU mounted on the rotation shift control CPU board 61. From the data representing the amount of deviation in the rotational direction, the drive data in the rotational direction is calculated by the CPU so as to cancel the amount of deviation in the rotational direction. The calculated drive data in the rotation direction is converted into an analog control signal in the digital / analog conversion circuit, and the converted analog control signal is supplied to the driver, whereby the prism rotation drive motor 23 is controlled. The amount of rotational deviation is corrected.

  As described above, the V-direction image stabilization control CPU board 59, the H-direction image stabilization control CPU board 60, and the rotation deviation control CPU board 61 are independent of each other, and each of the substrates 59, 60 and 61 performs the respective processes. Since the CPUs 101, 111 and the like that can be performed independently are mounted, the correction of the shake amount in the vertical direction, the correction of the shake amount in the horizontal direction, and the correction of the rotational deviation can be performed in parallel.

  The control of the anti-vibration lens 6 and the control of the rotational deviation require a relatively large number of calculations. Therefore, when all of these controls are performed using a single CPU, a relatively high-capacity CPU is required. Necessary. However, in this embodiment, since the CPU 101, 111, etc. mounted on separate substrates are used for vertical shake correction, horizontal shake correction, and rotational deviation correction, respectively, the amount of calculation is reduced. . A relatively low-capacity CPU can be used. When trying to control the camera using multiple CPU boards 51-62, if you want to share the CPU board from the viewpoint of cost reduction, it is necessary to match the control of the anti-vibration lens, which is considered to have the highest load. There is a need to use a CPU board with high processing capability. However, in this embodiment, since vertical shake correction, horizontal shake correction, and rotational deviation correction are performed on separate CPU boards, a CPU board having a relatively low processing capability can be used. The CPU board can be shared by using a CPU board having a low processing capability.

  The network communication between the substrates described above can use CAN (Controller Area Network) communication.

  FIG. 6 shows the structure of a data frame which is a transfer format for transmitting data in CAN communication.

  Data frames are either recessive or dominant. The numbers in each part indicate the number of bits. When no communication is performed, the bus is recessive (bus idle).

  The data frame includes a start of frame, an identifier field, an RTR, a control field, a data field, a CRC sequence, a CRC delimiter, an ACK slot, an ACK delimiter, and an end of frame. Is done.

  The start of frame represents the start of the data frame and is in a dominant state. The CPU board (receiving node) on the receiving side can perform synchronization by changing the start of frame from recessive in bus idle to dominant.

  The identifier field is used to identify the data contents and the CPU board (transmission node) on the transmission side. The CPU board on the receiving side can determine whether the data frame is used by detecting the contents described in the identifier field. The identifier field may determine the priority of communication arbitration.

  RTR (Remote Transmission Request) is used to identify a data frame for transmitting data and a remote frame for requesting data transmission. In the case of a data frame, the RTR is dominant. The RTR is also used for communication arbitration in the same manner as the identifier field.

  The control field indicates how many bytes are transmitted in the next data field.

  The data field is the portion of data transmitted in the data frame.

  The CRC (Cyclic Redundancy Check) sequence is a check for data corruption during data transmission.

  The CRC delimiter is a delimiter that indicates the end of the CRC sequence, and is fixed to a recessive 1-bit length.

  An ACK (Acknowledgement) slot is a field for normal reception confirmation.

  The ACK delimiter is a delimiter representing the end of the ACK slot and is fixed to a recessive 1-bit length.

  The end-of-frame indicates the end of transmission or reception, and is fixed to recessive.

  When data frames are transmitted simultaneously from a plurality of CPU boards, communication arbitration is performed. For example, when two data frames are transmitted, one bit of data described in the identifier field of each of the two data frames is compared, and the first difference data becomes the dominant one. Data frames are transmitted with priority.

  7 to 12 are flowcharts showing the processing procedure of the taking lens unit 1.

  As described above, the photographing lens unit 1 is not controlled by a CPU that controls the whole, but in each of a large number of CPU boards connected by a network line, each CPU board is independent of each other. The processing is performed. The following processing is also performed when necessary by each CPU board.

  FIG. 7 is a flowchart showing a focus processing procedure. This focus processing procedure is performed in the focus control CPU board 57.

  First, predetermined initial setting is performed (step 121), and network system communication processing is performed (step 122). In this network system communication process, communication with the camera body 30, the virtual system 40, other CPU boards 51, and the like is performed. For example, when there is a request for position data of the focus lens 2 from the camera body 30 to the focus control CPU board 57, the position data of the focus lens 2 is read by the focus control CPU board 57 in response to the request. The obtained position data is transmitted to the camera body 30.

  When a focus switch or the like is set in the external device, a focus request signal is generated. When the focus request signal is received by the focus request CPU board 52, the focus request signal is transmitted from the focus request CPU board 52 to the focus control CPU board 57. In response to the focus request signal, the focus control CPU board 57 acquires the position of the focus lens 2 (step 124).

  When the focus request signal is given to the taking lens unit 1 as described above, a focus command (including the position to which the focus lens 2 should move) is generated from the focus request CPU board 52, and the generated focus command is the focus control. It is transmitted to the CPU board 57. When the focus control CPU board 57 acquires the focus command (step 125), the focus lens 2 is driven under the control of the focus control CPU board 57 based on the acquired focus command (step 126).

  Steps 122 to 126 are repeated until an off command is given to the photographic lens unit 1 (step 127).

  When auto focus is set in the external device, a focus request signal is generated, and the generated focus request signal is given to the focus request CPU board 52. A focus command is generated in the focus request CPU substrate 52. In the case of auto focus, the generated focus command is given to the PF unit CPU board 62. On the PF unit CPU board 62, the intersection position of the graph showing the relationship between the AF evaluation value (contrast of the subject image) obtained from the first AF CCD and the second AF CCD and the position of the focus lens 2 is calculated. Is done. The calculated intersection position is set as the in-focus position, and data representing the in-focus position is transmitted from the PF unit CPU board 62 to the focus control CPU board 57. The focus control CPU substrate 57 is driven so that the focus lens 2 is positioned at the in-focus position.

  FIG. 8 is a flowchart showing the iris processing procedure. This iris processing is performed in the iris control CPU board 58.

  First, initialization is performed (step 131), and network communication processing is performed (step 132). In this network communication process, for example, a request signal for the position (aperture value) of the iris 4 is received from the camera body 30. The received data representing the position of the iris 4 is transmitted from the iris control CPU board 58 to the camera body 30.

  The position of the iris 4 is acquired (step 133), and an iris command (including data on the position of the iris to be set) transmitted from the camera body 30 is received by the iris control CPU board 58 (step 134). Then, the iris control CPU board 58 is driven so that the iris 4 has a desired aperture value in accordance with the received iris command (step 135).

  The processing from step 132 to 135 is repeated until an off command is given to the taking lens unit 1 (step 136).

  FIG. 9 is a flowchart showing a zoom processing procedure, a V-direction image stabilization processing procedure, and an H-direction image stabilization processing procedure. The zoom process is performed by the zoom control CPU board 56, the V direction image stabilization process is performed by the V direction image stabilization CPU board 59, and the H direction image stabilization process is performed by the H direction image stabilization control CPU board 60.

  When zoom processing is performed, initial setting is first performed (step 141), and network system communication processing is performed (step 142). In the network communication process, when there is a request for the zoom position from the camera body 30 or the like, the zoom position is read according to the request, and the data representing the read zoom position is sent from the zoom control CPU board 56 to the camera body 30. Etc.

  Similarly to the focus processing, when a zoom request signal (including a zoom position) is given from the external device to the photographing lens unit 1, the zoom request signal is input to the zoom request CPU board 51. The zoom request signal is given from the zoom request CPU board 51 to the zoom control CPU board 56. Then, the zoom position of the zoom lens 3 is acquired by the zoom control CPU board 56 (step 144).

  A zoom command is generated from the zoom request CPU substrate 51, and the generated zoom command is input from the zoom request CPU substrate 51 to the zoom control CPU substrate 56. A zoom command is acquired in the zoom control CPU board 56 (step 145). Then, the zoom lens 3 is driven by the zoom control CPU board 56 with reference to the acquired zoom position of the zoom lens 3 so that the zoom position is in accordance with the zoom request signal (step 146).

  Steps 142 to 146 are repeated until an off command is given to the taking lens unit 1 (step 147).

  When V-direction image stabilization processing is performed in the V-direction image stabilization control CPU board 59, initial setting is performed (step 151), and network communication processing is performed (step 152). In the network communication process, a zoom position request is made from the V direction image stabilization control CPU board 59 to the zoom control CPU board 56, and the zoom lens 3 zooms under the control of the zoom control CPU board 56 in response to the request. The position is read. Data representing the read zoom position is transmitted from the zoom control CPU board 56 to the V direction image stabilization control CPU board 59.

  When the vertical vibration of the taking lens unit 1 is detected by the angular velocity sensor 88 and the detected signal is input to the V-direction image stabilization control CPU board 59 (step 153), the vertical correction amount calculation process (V Direction anti-vibration calculation) is performed (step 154). The anti-vibration lens 7 is driven under the control of the V-direction anti-vibration control CPU board 59 so that the calculated vertical correction amount is shifted in the vertical direction (step 155).

  Steps 152 to 155 are repeated until the taking lens unit 1 is turned off (step 156).

  When the H direction image stabilization process is performed in the H direction image stabilization control CPU board 60, the initial setting is performed (step 161), and the network communication process is performed (step 162). Also in the H direction image stabilization control CPU board 60, in the network communication processing, a request for a zoom position is made from the H direction image stabilization control CPU board 60 to the zoom control CPU board 56. The zoom position of the zoom lens 3 is read under control. Data representing the read zoom position is transmitted from the zoom control CPU board 56 to the H direction image stabilization control CPU board 60.

  When the horizontal vibration of the photographic lens unit 1 is detected by the angular velocity sensor 90 and the detection signal is input to the H direction image stabilization control CPU board 60 (step 163), the horizontal correction amount calculation process (H Direction anti-vibration calculation) is performed (step 164). The anti-vibration lens 7 is driven under the control of the H-direction anti-vibration control CPU substrate 60 so as to be shifted in the horizontal direction by the calculated horizontal correction amount (step 165).

  Steps 162 to 165 are repeated until the taking lens unit 1 is turned off (step 166).

  Since the V direction image stabilization process is performed by the V direction image stabilization control CPU board 59 and the H direction image stabilization process is performed by the H direction image stabilization control CPU board 60, the V direction image stabilization process and the H direction image stabilization process are performed. Can be done simultaneously. Further, as described above, since the image stabilization calculation for shifting the image stabilization lens 6 is extremely enormous, a high-performance CPU is required to perform the image stabilization calculation process using one CPU. However, in this embodiment, the anti-vibration calculation processing in the vertical direction and the horizontal direction is performed using the two CPU boards 59 and 60. Therefore, the anti-vibration calculation processing is performed using a CPU having a relatively low capacity. realizable. Moreover, since the CPU boards 59 and 60 are separate boards, even if one of them fails, it can be repaired by simply replacing the failed board.

  FIG. 10 is a time chart of the image stabilization process.

  As described above, the vertical shake correction process on the V-direction image stabilization control CPU board 59 and the horizontal shake correction process on the H-direction image stabilization control CPU board 60 can be performed simultaneously. For example, the first vertical shake correction process and the horizontal shake correction process are simultaneously performed by time t1, and the second, third, and fourth vertical correction processes are performed by time t2, t3, and t4, respectively. The direction shake correction process and the horizontal direction shake correction process can be performed simultaneously.

  Conventionally, the vertical shake correction process and the horizontal shake correction process cannot be performed at the same time, and thus are performed alternately. Both the vertical shake correction process and the horizontal shake correction process are performed. However, in this embodiment, since the vertical shake correction process and the horizontal shake correction process can be performed at the same time, the vertical shake correction process and the horizontal shake correction process are performed in this embodiment. The time required to complete both the correction process and the direction shake correction process is shortened.

  FIG. 11 is a flowchart showing an indicator control processing procedure. This indicator control processing procedure is performed by the display control CPU board 54.

  Also in the indicator control processing, initial setting is performed (step 181), and network system communication processing is performed (step 182). For example, when a transmission command for the display status of the display devices 73 and 74 is given from the camera body 30 in the network system communication processing, the display status of the display devices 73 and 74 is read according to the transmission command. Data representing the read display state is transmitted to the camera body 30.

  When a display command for the display devices 73, 74, etc. is given from the camera body 30, the display devices 73, 74 are displayed by the display control CPU board 54 in accordance with the display commands (step 183).

  Steps 182 and 183 are repeated until the taking lens unit 1 is turned off (step 184).

  FIG. 12 is a flowchart showing a camera communication processing procedure. The camera communication process is performed by the CPU board 55.

  The camera communication process is performed in the communication between the camera body 30 and the photographing lens unit 1, and when the communication between the camera body 30 and the photographing lens unit 1 is executed in each process described above, The camera communication process shown in FIG. 12 is performed.

  Also in the camera communication process, initialization is performed (step 191), and the network communication process 192 is executed (step 192). In the network communication process, data is received and transmitted from CPU boards other than the CPU board 55.

  If it is determined that communication with the camera body 30 is necessary by receiving data transmitted from a CPU board other than the CPU board 55, protocol conversion is performed so that the received data can be transmitted to the camera body 30. Done. The converted data is transmitted from the CPU board 55 to the camera body 30 to perform camera communication processing (step 193). If it is determined that it is necessary to transmit the received data to a CPU board other than the CPU board 55 by receiving the data transmitted from the camera body 30, the received data is transferred to a CPU other than the CPU board 55. Protocol conversion for transmitting to the substrate (protocol conversion so that CAN communication described above can be performed) is performed. The converted data is transmitted to a desired CPU board. For example, if an iris signal for setting the iris value of the iris 4 is transmitted from the camera body 30, the iris signal is subjected to protocol conversion in the CPU board 55. The iris signal subjected to protocol conversion is supplied to the iris control CPU board 58, and the iris 4 is controlled.

  Steps 192 and 193 are repeated until the taking lens unit 1 is turned off (step 194).

  Since the CPU is mounted on each of the CPU boards 51-64, the above-described processing can be executed simultaneously on each CPU board. This shortens the time until all or a plurality of processes are completed. When data is transmitted from different or the same CPU board and collides in the network line, arbitration is performed as described above, the priority data can use the network line, and then other than the priority data Other data is provided to the CPU board using the network line.

  FIG. 13 shows a modification and is a block diagram showing another electrical configuration of the photographing lens unit 1A.

  In FIG. 13, the same components as those shown in FIG.

  In the embodiment shown in FIG. 13, a first common bus BUS1 and a second common bus BUS2 are included. A zoom request CPU board 51, a focus request CPU board 52, a switch control CPU board 53, a display control CPU board 54, and a CPU board 55 are connected to the first common bus BUS1. In addition, a CPU board 55, a zoom control CPU board 56, a focus control CPU board 57, an iris control CPU board 58, a V-direction anti-vibration control CPU board 59, an H-direction anti-vibration control CPU board 60, A rotation deviation control CPU board 61, a PF unit CPU board 62, and additional control CPU boards 63 and 64 are connected.

  In this way, the same control as described above can be realized by connecting a plurality of CPU boards to the common bus. It goes without saying that the number of common buses is not two, but may be one or three or more.

  In this embodiment, the entire photographic lens unit 1 or 1A is not integrated by one CPU, but each process is executed by each CPU board of a large number of CPU boards. Can be executed simultaneously, reducing the time required for many processes. Also, when a specific board fails, repair is easy because only the failed board needs to be replaced. Furthermore, since the CPUs mounted on the single substrates only need to be able to execute the processes assigned to them, it is only necessary that the CPUs have the ability to execute the processes. A large number of processes can be executed even by a CPU having a relatively low capacity.

  In the above-described embodiment, the angular velocity sensor 88 for detecting the amount of shake in the V direction is connected to the V direction image stabilization control CPU board 59, and the angle velocity sensor 90 for detecting the amount of shake in the H direction is connected to the H direction image stabilization control CPU board 60. However, the sensor for detecting the position of the image stabilization lens 7 in the V direction is provided on the V direction image stabilization control board 59, and the position of the image stabilization lens 7 in the H direction is detected on the image stabilization control board 60. A sensor may be provided. In that case, a new angular velocity sensor control CPU board is connected by a network line, and a sensor for detecting the amount of shake in the V direction and a sensor for detecting the amount of shake in the H direction are connected to the angular velocity sensor control CPU board. It will be. Data representing the amount of shake in the V direction and data representing the amount of shake in the H direction detected on the angular velocity sensor control CPU board are obtained from the angular velocity sensor control CPU board, the V direction image stabilization control board 59, and the H direction image stabilization control board. 60, the V direction image stabilization control board 59 corrects the shake amount of the image stabilization lens 7 in the V direction, and the H direction image stabilization control board 60 corrects the shake amount of the image stabilization lens 7 in the H direction. The

  In the embodiment described above, CAN communication is used, but network technologies other than CAN communication may be used. For example, PROFIBUS, CC-Link, Interbus, EC-NET, etc. can be used.

  In the above-described embodiment, the CPU boards 51-64 are connected by the network line (the transceivers for communicating via the network line as necessary are the transceivers mounted on these boards 51-64. However, the CPU boards 51-64 and the network line are detachably connected by a connector or the like.

  The zoom control CPU board 56, the focus control CPU board 57, the iris control CPU board 58, the V direction image stabilization control CPU board 59, the H direction image stabilization control CPU board 60, and the rotation deviation control CPU board 61 have the same configuration. A common substrate is used. The zoom request CPU board 51 and the focus request CPU board 52 are both mounted with a CPU, and the zoom request signal or the focus request signal is sent to the zoom request CPU board 51 or the focus request CPU board 52 via an analog / digital conversion circuit. Is input to the CPU mounted on. Further, the switch control CPU board 53 and the display control CPU board 54 have the same configuration, and signals inputted from the switches 71 and 72 and the like are inputted to the CPU of the switch control CPU board 53 via the analog / digital conversion circuit to perform display control. Control data from the CPU of the CPU board 54 is converted into an analog control signal in the digital / analog conversion circuit and input to the display devices 73 and 74. Further, the configurations of the PF unit CPU board 62 and the additional control CPU boards 63 and 64 may be the same.

  Since the CPU control boards 51-64 are commonly mounted with a communication circuit (transceiver) for communicating via the CPU and the network line, the circuits can be shared.

1,1A Photo lens unit
51-64 CPU board 8 Voice coil motor (second correction device)
8A Voice coil motor (first correction device)
59 V direction anti-vibration control CPU board (second board)
60 H direction anti-vibration control CPU board (first board)
88 Angular velocity sensor (second sensor)
90 Angular velocity sensor (first sensor)
101 CPU (second control circuit)
111 CPU (first control circuit)

Claims (4)

A plurality of boards in which a control circuit is mounted on each of a plurality of independent boards, and at least two or more boards have the same structure, and the boards are connected by a network line;
A first sensor for detecting a horizontal image blur of an imaging optical system of the camera;
A first correction device for correcting horizontal image blur detected by the first sensor;
A second sensor for detecting image blur in the vertical direction of the imaging optical system of the camera, and a second correction device for correcting image blur in the vertical direction detected by the second sensor;
The first correction device is controlled to correct the image blur in the horizontal direction detected by the first sensor using a first control circuit mounted on the first substrate among the plurality of substrates. The second correction device corrects the image blur in the vertical direction detected by the second sensor using a second control circuit mounted on the second substrate among the plurality of substrates. Control
Camera image blur correction device. A third sensor for detecting a rotational deviation of the imaging optical system of the camera, and a third correction device for correcting the rotational deviation detected by the third sensor;
Controlling the third correction device so as to correct the rotational deviation detected by the third sensor using a third control circuit mounted on a third substrate among the plurality of substrates;
The image blur correction device for a camera according to claim 1. A process for controlling the first correction device so as to correct the image blur in the horizontal direction using the first control circuit mounted on the first board; and a process mounted on the second board. A process of controlling the second correction device so as to correct the image blur in the vertical direction using the second control circuit is performed in parallel.
The camera image blur correction device according to claim 1. A control circuit is mounted on each of a plurality of independent boards, and at least two or more boards have the same structure, and the boards are connected by a network line.
The first sensor detects the image blur in the horizontal direction of the imaging optical system of the camera,
A first correction device for correcting a horizontal image blur detected by the first sensor;
A second sensor detects image blur in the vertical direction of the imaging optical system of the camera;
A second correction device corrects a vertical image blur detected by the second sensor;
The first correction device is controlled to correct the image blur in the horizontal direction detected by the first sensor using a first control circuit mounted on the first substrate among the plurality of substrates. The second correction device corrects the image blur in the vertical direction detected by the second sensor using a second control circuit mounted on the second substrate among the plurality of substrates. Control
An operation control method of a camera image blur correction apparatus.

Images