JP2011149971A - Camera system - Google Patents

Abstract

An object of the present invention is to return the state in the interchangeable lens to the same state as before the stop of the power supply when the power supply is resumed while reducing the possibility of the memory means in the interchangeable lens being destroyed.
A camera system including a camera body and an interchangeable lens, the interchangeable lens relates to a lens that moves along an optical axis, a detection unit that detects a state of the lens, and a state detected by the detection unit. Lens side notification means for notifying the camera body of the status information, and the camera body includes a supply means for supplying power to the interchangeable lens, a stop means for stopping the supply of power by the supply means, and a power supply by the stop means. A command notification means for notifying the interchangeable lens of a power stop notice command for stopping supply; a storage means for storing information; and the lens side control means and the body side control means are an interchangeable lens and a camera. Predetermined control over the body.
[Selection] Figure 1

Description

  The present invention relates to a camera system, and more particularly to a camera system including an interchangeable lens and a camera body.

  Japanese Patent Application Laid-Open No. 2004-228561 discloses a video camera that includes a lens unit and a camera body and that is interchangeable with a lens unit. The lens unit included in this video camera has a storage device. The storage device stores position information of a variable power lens and a correction lens included in the lens unit. When the video camera is turned on again after the power is turned off, the position information stored in the storage device is referred to return the positions of the zoom lens and the correction lens to the same state as before the power is turned off.

As a result, the video camera disclosed in Patent Document 1 can reproduce the state in the lens unit before power-off even when the power is turned off and then on again.
JP-A-9-65186

  However, in the video camera disclosed in Patent Document 1, the lens unit stores position information in a storage device included in the lens unit. Further, power for driving the lens unit is supplied from the camera body. In such a case, if the lens unit is removed from the camera body while the lens microcomputer is writing lens position information to the storage device, a part of the storage area in the storage device may be damaged. .

  The present invention is a camera system capable of returning the state in the interchangeable lens to the same state as before the power supply is stopped when the power supply is resumed while reducing the possibility of the storage area in the storage means in the interchangeable lens being damaged. The purpose is to provide.

  In order to solve the above-described problems, a camera system according to the present invention is a camera system including a camera body and an interchangeable lens, and the interchangeable lens includes a lens that moves along an optical axis, and a driving unit that drives the lens. And a detection means for detecting the state of the lens, a lens-side notification means for notifying the camera body of state information relating to the state detected by the detection means, and a lens-side control means for controlling the interchangeable lens. Are a supply means for supplying power to the interchangeable lens, a stop means for stopping the supply of power by the supply means, and a command for notifying the interchangeable lens of a power stop notice command for stopping the supply of power by the stop means. Notification means, storage means for storing information, and body-side control means for controlling the camera body. In response to acquiring the power stop notice command from the mode notification means, the detection means is controlled to detect the state of the lens, and the lens side notification means is controlled to notify the camera body of the status information regarding the detected state, The body-side control means controls the storage means to store the acquired state information in response to acquiring the state information from the lens-side notification means, and then stops the power supply to the interchangeable lens. Control.

  Thereby, even after the supply of power to the interchangeable lens is stopped, the camera body can hold information about the position of the lens before the supply of power is stopped. As a result, when the power supply is resumed, the interchangeable lens can be returned to the state before the power supply is stopped.

  In the camera system according to the present invention, the lens-side control unit may control the driving unit to move the lens to a predetermined position after controlling the detection unit to detect the state of the lens.

  In the camera system according to the present invention, the state information may be information regarding the position of the lens.

  Thereby, the camera system according to the present invention can return the lens position to the same state as before the power supply is stopped after the power supply is resumed.

  In the camera system according to the present invention, the state information may be information related to a moving direction when the lens moves immediately before.

  Thereby, the camera system according to the present invention can return the hysteresis to the same state as before the power supply is stopped after the power supply is resumed.

  In the camera system according to the present invention, the camera body further includes body-side notification means for notifying the interchangeable lens of the state information stored in the storage means after the supply of power by the supply means, and the lens-side control means May control the driving means to drive the lens in response to obtaining the state information from the body-side notification means.

  Thereby, the camera system according to the present invention can return the interchangeable lens to the state before the power supply is stopped when the power supply is resumed.

  Further, in the camera system according to the present invention, the camera body determines whether or not the mounted interchangeable lens is the same as the mounted interchangeable lens when the state information stored in the storage unit is acquired. The body side notifying unit may switch whether to notify the status information to the interchangeable lens according to the determination result by the determining unit.

  Thus, the camera system according to the present invention can automatically move various lenses in the interchangeable lens when an interchangeable lens different from the interchangeable lens that was mounted before the power supply is stopped is mounted. Absent. As a result, the camera system according to the present invention can manage various states in the interchangeable lens for each interchangeable lens.

  As a result, the present invention can return the state in the interchangeable lens to the same state as before the stop of the power supply when the power supply is resumed while reducing the possibility that the storage area in the storage means in the interchangeable lens is damaged. A camera system capable of being provided can be provided.

[1. Embodiment 1]
[1-1. Constitution〕
[1-1-1. Overview〕
FIG. 1 is a block diagram showing a configuration of a camera system 1 according to Embodiment 1 of the present invention. The camera system 1 includes a camera body 100 and an interchangeable lens 200 that can be attached to and detached from the camera body 100. The present invention relates to an interchangeable lens camera system, and in particular, when the entire camera system or interchangeable lens is turned off and then turned on again, various states in the interchangeable lens are turned off. It is an invention made to return to the same state as before.

[1-1-2. Configuration of camera body)
The camera body 100 includes a CCD image sensor 110, a liquid crystal monitor 120, a camera controller 140, a body mount 150, a power source 160, and a card slot 170.

  The camera controller 140 controls the entire camera system 1 such as the CCD image sensor 110 in response to an instruction from an operation member such as the release button 130. The camera controller 140 transmits a vertical synchronization signal to the timing generator 112. The camera controller 140 uses the DRAM 141 as a work memory during the control operation and the image processing operation. The flash memory 142 stores programs and parameters used when the camera controller 140 is controlled.

  The CCD image sensor 110 captures a subject image incident through the interchangeable lens 200 and generates image data. The generated image data is digitized by the AD converter 111. The image data digitized by the AD converter 111 is subjected to various image processing by the camera controller 140. The various image processings referred to here include, for example, gamma correction processing, white balance correction processing, scratch correction processing, YC conversion processing, electronic zoom processing, image compression processing such as JPEG compression processing, and the like.

  The CCD image sensor 110 operates at a timing controlled by the timing generator 112. The operation of the CCD image sensor 110 includes a still image capturing operation, a moving image capturing operation, a through image capturing operation, and the like. Here, when performing a moving image capturing operation, the CCD image sensor 110 operates at a timing that matches the frame rate selected by the frame rate selection dial 131. In short, the frame rate selection dial 131 accepts an instruction regarding an imaging cycle in which the CCD image sensor 110 captures a subject image. A through image is an image that is not recorded on the memory card 171 after being imaged. The through image is mainly a moving image, and is displayed on the liquid crystal monitor 120 in order to determine a composition for capturing a still image.

  The liquid crystal monitor 120 displays an image indicated by the display image data image-processed by the camera controller 140. The liquid crystal monitor 120 can selectively display both moving images and still images.

  The card slot 170 can be loaded with a memory card 171. The card slot 170 controls the memory card 171 based on the control from the camera controller 140. The memory card 171 can store image data generated by image processing of the camera controller 140. For example, the memory card 171 can store a JPEG image file. The memory card 171 can output image data or an image file stored therein. The image data or image file output from the memory card 171 is subjected to image processing by the camera controller 140. For example, the camera controller 140 expands the image data or image file acquired from the memory card 171 and generates display image data.

  The power supply 160 supplies power for consumption by the camera system 1. The power source 160 may be, for example, a dry battery or a rechargeable battery. Moreover, the power supplied from the outside by the power cord may be supplied to the camera system 1.

  The body mount 150 can be mechanically and electrically connected to the lens mount 250 of the interchangeable lens 200. The body mount 150 can send and receive commands and data to and from the interchangeable lens 200 via the lens mount 250. The body mount 150 transmits various control signals received from the camera controller 140 to the lens controller 240 via the lens mount 250. The body mount 150 supplies the power received from the power supply 160 to the entire interchangeable lens 200 via the lens mount 250.

[1-1-3. Interchangeable lens configuration)
The interchangeable lens 200 includes an optical system, a lens controller 240, and a lens mount 250. The optical system of the interchangeable lens 200 includes a zoom lens 210, an OIS lens 220, a diaphragm 260, and a focus lens 230.

  The zoom lens 210 is a lens for changing the magnification of a subject image formed by the optical system of the interchangeable lens 200. The zoom lens 210 is composed of one or a plurality of lenses. The drive mechanism 211 includes a zoom ring or the like that can be operated by the user, transmits the operation by the user to the zoom lens 210, and moves the zoom lens 210 along the optical axis direction of the optical system. The detector 212 detects the drive amount in the drive mechanism 211. The lens controller 240 can grasp the zoom magnification in the optical system by acquiring the detection result in the detector 212.

  The OIS lens 220 is a lens for correcting blurring of a subject image formed by the optical system of the interchangeable lens 200. The OIS lens 220 moves in a direction that cancels out the blur of the camera system 1, thereby reducing the blur of the subject image on the CCD image sensor 110. The OIS lens 220 is composed of one or a plurality of lenses. The actuator 221 drives the OIS lens 220 in a plane perpendicular to the optical axis of the optical system under the control of the OIS IC 223. The actuator 221 can be realized by a magnet and a flat coil, for example. The position detection sensor 222 is a sensor that detects the position of the OIS lens 220 in a plane perpendicular to the optical axis of the optical system. The position detection sensor 222 can be realized by a magnet and a Hall element, for example. The OIS IC 223 controls the actuator 221 based on the detection result of the position detection sensor 222 and the detection result of a shake detector such as a gyro sensor. The OIS IC 223 obtains the detection result of the shake detector from the lens controller 240. Further, the OIS IC 223 transmits a signal indicating the state of the optical image blur correction process to the lens controller 240.

  The diaphragm 260 is a member for adjusting the amount of light passing through the optical system. The diaphragm 260 includes, for example, a plurality of diaphragm blades, and the amount of light can be adjusted by opening and closing an opening formed by the blades. The diaphragm motor 261 is a driving unit for opening and closing the opening of the diaphragm 260.

  The focus lens 230 is a lens for changing the focus state of the subject image formed on the CCD image sensor 110 in the optical system. The focus lens 230 is composed of one or a plurality of lenses.

  The focus motor 233 drives the focus lens 230 to advance and retract along the optical axis of the optical system based on the control of the lens controller 240. Thereby, the focus state of the subject image formed on the CCD image sensor 110 by the optical system can be changed. As the focus motor 233, a stepping motor is used in the first embodiment. However, the present invention is not limited to this. For example, it can be realized by a servo motor, an ultrasonic motor, or the like.

  The lens controller 240 controls the entire interchangeable lens 200 such as the OIS IC 223 and the focus motor 233 based on the control signal from the camera controller 140. The lens controller 240 receives signals from the detector 212, the OIS IC 223, and the like and transmits them to the camera controller 140. The lens controller 240 performs the transmission / reception with the camera controller 140 via the lens mount 250 and the body mount 150.

  The lens controller 240 uses the SRAM 241 as a work memory at the time of control. The flash memory 242 stores a program and parameters used when the lens controller 240 is controlled.

[1-1-4. Correspondence with the present invention]
The camera system 1 is an example of the camera system of the present invention. The camera body 100 is an example of the camera body of the present invention. The interchangeable lens 200 is an example of the interchangeable lens of the present invention.

  The zoom lens 210 or the focus lens 230 is an example of the lens of the present invention. The drive mechanism 211 or the focus motor 233 is an example of the drive unit of the present invention. The configuration including the detector 212 or the focus motor 233 and the counter 243 is an example of the detection means of the present invention. The configuration including the lens mount 250 and the lens controller 240 is an example of the lens-side notification means of the present invention. The lens controller 240 is an example of a lens side control unit of the present invention.

  The power supply 160 is an example of the supply means of the present invention. The camera controller 140 is an example of a stopping unit of the present invention. The configuration including the camera controller 140 and the body mount 150 is an example of a command notification unit of the present invention. The DRAM 141 or the memory card 171 is an example of the storage unit of the present invention. The camera controller 140 is an example of a body side control unit of the present invention. The configuration composed of the camera controller 140 and the body mount 150 is an example of the body side notification means of the present invention. The camera controller 140 is an example of a determination unit of the present invention.

[1-2. Operation)
An example of the operation of the camera system 1 according to the present embodiment will be described with reference to FIGS.

[1-2-1. (Normal mode and power save mode)
The camera system 1 according to the present embodiment operates in a normal mode and a power save mode.

  Here, the normal mode is a state in which power is supplied to both the camera body 100 and the interchangeable lens 200. For example, when the camera system 1 captures a subject image, the camera system 1 operates in the normal mode.

  The power save mode is a state in which power is partially supplied to the camera body 100 but power is not supplied to the interchangeable lens 200. For example, if the camera system 1 set in the normal mode is left without being operated for a certain period of time or longer, it automatically shifts from the normal mode to the power save mode. Thus, when the user does not operate the camera system 1, the power supply of the interchangeable lens 200 is automatically turned off. As a result, the camera system 1 can save power.

  When the camera system 1 set in the power save mode is operated by the user, the camera system 1 shifts from the power save mode to the normal mode. As described above, when the user operates the camera system 1, the mode immediately shifts to the normal mode. As a result, the camera system 1 can immediately shift to the imaging preparation operation when necessary, while saving power.

[1-2-2. (Transition from normal mode to power save mode)
The transition from the normal mode to the power save will be described with reference to FIG. If the camera system 1 set in the normal mode is not operated by the user for a certain time or longer, the camera system 1 shifts from the normal mode to the power save mode. At that time, the camera controller 140 transmits a power stop notice command to the interchangeable lens 200 (S100). Here, the power stop notice command is a command for stopping the power supply from the camera body 100 to the interchangeable lens 200.

  When the power stop notice command is received (S110), the lens controller 240 detects the position of the zoom lens 210, the position of the focus lens 230, and information related to the driving direction immediately before the zoom lens 210 and the focus lens 230 ( S120). The lens controller 240 temporarily stores the detected information in the SRAM 241. When detecting the state information of the interchangeable lens 200, the lens controller 240 moves the focus lens 230 to the origin position (S130). Here, the origin position is a predetermined reference point of the focus lens 230. When the focus lens 230 is moved to the origin position, the lens controller 240 transmits the state information stored in the SRAM 241 to the camera body 100 (S140).

  When status information is received from the lens controller 240 (S150), the camera controller 140 records the received status information in the flash memory 142 (S160). When the state information is recorded, the camera controller 140 stops the power supply to the interchangeable lens 200 (S170).

  As described above, the camera system 1 according to the present embodiment stores information on the positions of the zoom lens 210 and the focus lens 230 in the flash memory 142 in the camera body 100 when shifting to the power save mode. did. Thereby, even after the power supply of the interchangeable lens 200 is turned off, information on the positions of the zoom lens 210 and the focus lens 230 before the power supply is turned off can be held. As a result, when the power is turned on again, the interchangeable lens 200 can be returned to the state before the power is turned off.

  The camera system 1 according to the present embodiment is configured to move the focus lens 230 to the origin position when shifting to the power save mode. This is because the focus motor 233 is formed of a stepping motor in the present embodiment. In this embodiment, since the stepping motor is used, the lens controller 240 can detect the relative movement amount of the focus lens 230, but cannot detect the absolute position of the focus lens 230. . Therefore, the focus lens 230 can be recognized by moving the focus lens 230 to the origin position every time the power supply of the interchangeable lens 200 is turned off.

  Further, the camera system 1 according to the present embodiment stores the state information of the interchangeable lens 200 in the camera body 100 without storing it in the interchangeable lens 200. The reason for this will be described below. In the interchangeable lens camera system such as the camera system 1, the interchangeable lens 200 does not have a power source and operates by receiving power from the camera body 100. Further, in the interchangeable lens camera system, it is not known when the interchangeable lens 200 is removed from the camera body 100. In such a situation, the interchangeable lens 200 may be removed from the camera body 100 when the interchangeable lens 200 writes its own state information in the flash memory 242 in the interchangeable lens 200. When power supply from the camera body 100 to the interchangeable lens 200 is stopped while the interchangeable lens 200 is writing state information in the flash memory 242 in the interchangeable lens 200, the state information in the interchangeable lens 200 and the flash memory 242 are stopped. May be destroyed. If the flash memory 242 is destroyed, various information stored in the flash memory 242 is also destroyed, and the interchangeable lens 200 itself cannot be restored. Therefore, in the camera system 1 according to the present embodiment, the state information of the interchangeable lens 200 is not stored in the flash memory 242 in the interchangeable lens 200, but is stored in the flash memory 142 in the camera body 100.

[1-2-3. (Transition from power save mode to normal mode)
The transition from the power save mode to the normal mode will be described with reference to FIG. When the camera system 1 set in the power save mode is operated by the user, the camera controller 140 resumes the supply of power to the interchangeable lens 200 and transmits an initialization command (S200). Here, the initialization command is a command that prompts the interchangeable lens 200 to transmit state information such as the position of the zoom lens 210 and the position of the focus lens 230.

  When the initialization command is received (S210), the lens controller 240 initializes the lens controller 240 itself, detects the origin of the focus lens 230, and detects the origin of the diaphragm 260 (S220). When these detections are performed, the lens controller 240 transmits the detected information and initialization completion information to the camera body 100 (S230).

  When the initialization completion information is received (S240), the camera controller 140 transmits a lens identification command to the interchangeable lens 200 (S250). Here, the lens identification command is a command that prompts the interchangeable lens 200 to transmit identification information that the interchangeable lens individually has. For example, the lens ID and serial number correspond to the identification information.

  When the lens identification command is received (S260), the lens controller 240 transmits its own lens ID, serial number, and the like to the camera body 100 (S270).

  When the lens ID, serial number, etc. are received (S280), the camera controller 140 determines whether or not the currently mounted interchangeable lens is the same lens as the interchangeable lens mounted before shifting to the power saving mode. Judgment is made (S290).

  If it is determined that they are not the same interchangeable lens, the camera controller 140 shifts to the normal mode as it is and starts shooting (S300).

  On the other hand, when determining that they are the same interchangeable lens, the camera controller 140 sends various state information and a state return command of the interchangeable lens 200 stored in the flash memory 142 before the power save mode transition to the interchangeable lens 200. Transmit (S310).

  When the state return command is received (S320), the lens controller 240 drives the drive mechanism 211 and the focus motor 233 to return to the same state as before the shift to the power save mode based on the received state information. (S330). After returning to the same state as before the transition to the power save mode, the lens controller 240 completes returning to the camera body 100 that the state in the interchangeable lens has been returned to the same state as before the transition to the power save mode. Information is transmitted (S340). After the camera body 100 acquires the return completion information (S350), the camera system 1 shifts to the normal mode and starts shooting (S360).

  Thus, in the camera system 1 according to the present embodiment, when shifting from the power save mode to the normal mode, the various states in the interchangeable lens are returned to the same state as before the shift to the power save mode. Thereby, when the supply of power is resumed, the interchangeable lens can be returned to the state before the supply of power is stopped.

  Further, in the camera system 1 according to the present embodiment, when shifting from the power save mode to the normal mode, various states in the interchangeable lens can be obtained only when the same interchangeable lens as that before the power save mode is mounted. Is configured to return to the same state as before the transition to the power save mode. Thus, when an interchangeable lens different from the interchangeable lens that was mounted before the transition to the power save mode is mounted, the various lenses in the interchangeable lens are not automatically moved. As a result, the camera system 1 can manage various states (focus lens position, zoom lens position, etc.) in the interchangeable lens for each interchangeable lens.

  In the present embodiment, the camera system 1 drives not only the position of the zoom lens 210 and the focus lens 230 but also the driving of the zoom lens 210 and the focus lens 230 when shifting from the power save mode to the normal mode. The direction is also restored to the same state as before the transition to the power save mode. This is because the interchangeable lens 200 having the zoom lens 210 and the focus lens 230 has a configuration having hysteresis. By returning the driving directions of the zoom lens 210 and the focus lens 230 to the same state as before the shift to the power save mode as in the present embodiment, the camera system 1 can also save power in a state where hysteresis is also eliminated. It is possible to transition to the same state as before the transition to the mode.

  Further, the camera system 1 according to the present embodiment is configured to store not only the position information of the focus lens 230 but also the position information of the zoom lens 210 in the camera body 100. The reason for this will be described below. The zoom lens 210 is driven manually by a zoom ring. Therefore, the user can drive the zoom lens 210 even when the power supply to the interchangeable lens 200 is cut off. In such a case, if the zoom lens 210 is driven when the mode is shifted to the power save mode, the focus state of the subject that the camera system 1 captures when the mode is shifted again to the normal mode is changed. Therefore, the camera system 1 according to the present embodiment acquires the position of the zoom lens 210 when shifting from the normal mode to the power save mode. Further, the camera system 1 holds information on the relationship between the position of the zoom lens 210 and the position of the focus lens 230 in advance in the flash memory 242 as shown in FIG. Therefore, when the camera system 1 is driven in the power save mode and the zoom lens 210 is driven, when the camera system 1 is shifted to the normal mode again, the same focus state as before the shift to the power save mode is obtained. Thus, the focus lens 230 can be driven. For example, assume that the zoom lens that was in X1 before the transition to the power save mode has moved to X2 after the transition to the power save mode. In this case, when the camera system 1 shifts from the power save mode to the normal mode, the focus lens 230 is moved to Y2 instead of Y1 before the power save mode shift. As a result, the focus lens 230 can be moved to a position that reproduces the same focus state as before the power save mode.

[1-3. Summary of the present embodiment]
The camera system 1 according to the present embodiment is a camera system including a camera body 100 and an interchangeable lens 200. The interchangeable lens 200 includes a zoom lens 210 and / or a focus lens 230 that move along an optical axis, A drive mechanism 211 or / and a focus motor 233 for driving the zoom lens 210 or / and the focus lens 230, a detector 212 or / and a lens controller 240 and a counter 243 for detecting the state of the zoom lens 210 or / and the focus lens 230 A lens mount 250 for notifying the camera body 100 of state information relating to the state detected by the configuration comprising the detector 212 or / and the lens controller 240 and the counter 243, and a lens component for controlling the interchangeable lens 200. The camera body 100 includes a power supply 160 that supplies power to the interchangeable lens 200, a camera controller 140 that stops the power supply from the power supply 160, and a power supply that is stopped by the camera controller 140. The lens controller 240 includes a body mount 150 that notifies the interchangeable lens 200 of a power stop notice command, a DRAM 141 or flash memory 142 that stores information, and a camera controller 140 that controls the camera body 100. The drive mechanism 211 or / and the lens controller 240 and the counter 243 are configured to detect the state of the zoom lens 210 or / and the focus lens 230 in response to acquiring the power stop notice command from 150. , And controls the lens mount 250 so as to notify the camera body 100 of state information regarding the detected state, and the camera controller 140 stores the acquired state information in response to acquiring the state information from the lens controller 240. Then, the DRAM 141 or the flash memory 142 is controlled so that the power supply to the interchangeable lens 200 is stopped, and then the camera controller 140 is controlled.

  Thereby, even after the power of the interchangeable lens 200 is turned off, the camera body 100 can hold information on the positions of the zoom lens 210 and the focus lens 230 before the power is turned off. As a result, when the power is turned on again, the interchangeable lens 200 can be returned to the state before the power is turned off.

  In the camera system 1 according to the present embodiment, the lens controller 240 controls the configuration of the detector 212 or / and the lens controller 240 and the counter 243 so as to detect the state of the zoom lens 210 or the focus lens 230. Later, the drive mechanism 211 and / or the focus motor 233 are controlled so as to move the zoom lens 210 and / or the focus lens 230 to a predetermined position.

  In the camera system 1 according to the present embodiment, the state information is information regarding the position of the zoom lens 210 and / or the focus lens 230.

  Thereby, the camera system 1 according to the present embodiment can return the position of the zoom lens 210 and / or the focus lens lens 230 to the same state as before the power supply is stopped after the power supply is resumed.

  Further, in the camera system 1 according to the present embodiment, the state information is information regarding the moving direction when the zoom lens 210 and / or the focus lens 230 has moved immediately before.

  Thereby, the camera system 1 according to the present embodiment can return the hysteresis to the same state as before the power supply is stopped after the power supply is resumed.

  Further, in the camera system 1 according to the present embodiment, the camera body 100 includes the body mount 150 that notifies the interchangeable lens 200 of the state information stored in the DRAM 141 or the memory card 171 after the power supply 160 supplies power. In addition, the lens controller 240 controls the drive mechanism 211 and / or the focus motor 233 to drive the zoom lens 210 and / or the focus lens 230 in accordance with the acquisition of the state information from the body mount 150.

  Thereby, the camera system 1 according to the present embodiment can return the interchangeable lens to the state before the power supply is stopped when the power supply is resumed.

  In the camera system 1 according to the present embodiment, the camera body 100 includes the interchangeable lens 200 that is mounted when the mounted interchangeable lens 200 acquires state information stored in the DRAM 141 or the memory card 171. The body mount 150 switches whether or not to notify the interchangeable lens 200 of state information according to the determination result by the camera controller 140.

Thus, the camera system 1 according to the present embodiment automatically moves various lenses in the interchangeable lens when an interchangeable lens different from the interchangeable lens that was mounted before the power supply is stopped is mounted. I will not let you. As a result, the camera system according to the present invention can manage various states in the interchangeable lens for each interchangeable lens.
[2. Other Embodiments]
As described above, the first embodiment has been described as the embodiment of the present invention. However, the present invention is not limited to these. Therefore, other embodiments of the present invention will be described collectively in this section.

  In Embodiment 1 of the present invention, the various states in the interchangeable lens are the same as those before the power save mode transition only when the same interchangeable lens is mounted as the interchangeable lens mounted before the power save mode transition. It was set as the structure returned to. However, it is not necessarily limited to such a configuration. For example, even when an interchangeable lens that is different from that before the power save mode transition is mounted, it may be configured to return to the same state as before the power save mode transition.

  In Embodiment 1 of the present invention, when the same interchangeable lens as the interchangeable lens that was mounted before the transition to the power save mode is mounted, the various states in the interchangeable lens are changed to those before the shift to the power save mode. It was set as the structure which returns to the same state. However, it is not necessarily limited to such a configuration. For example, even if the same interchangeable lens is attached, the user can set a mode that does not return to the same state as before the power save mode transition, and if that mode is set, It may be configured not to return to the same state as before the save mode transition.

  In the first embodiment of the present invention, the state information of various lenses is notified from the lens controller 240 to the camera controller 140 when shifting from the normal mode to the power save mode. However, it is not necessarily limited to such a configuration. For example, the lens controller 240 may notify the camera controller 140 of various lens information even when the camera system 1 moves from the normal mode to the power-off state. Accordingly, even when the power is turned on again after the power is turned off, the state of the focus lens 230 can be returned to the state before the power is turned off.

  In the first embodiment of the present invention, the camera system 1 shifts from the normal mode to the power save mode when the user does not operate the camera system 1 for a predetermined time or longer. However, it is not necessarily limited to such a configuration. For example, a configuration in which the user can set the camera system 1 to the power saving mode may be adopted.

  In the first embodiment of the present invention, the interchangeable lens 200 is configured to include the flash memory 242. However, such a configuration is not necessarily required. Instead of the flash memory 242, a ROM that cannot be written may be used.

  Further, in the first embodiment of the present invention, the configuration having the zoom lens 210 and the OIS lens 220 has been exemplified, but these are not essential configurations for the present invention. In other words, the present invention can be applied to a camera system equipped with a single focus lens that does not have a zoom function, and can also be applied to a camera system equipped with an interchangeable lens that does not have a camera shake correction function. It is.

  In Embodiment 1 of the present invention, a camera body that does not include a movable mirror is illustrated, but the present invention is not limited to this. For example, a movable mirror may be provided in the camera body, or a prism for separating the subject image may be provided. Moreover, the structure provided with a movable mirror not in a camera body but in an adapter may be sufficient.

  In the first embodiment of the present invention, the CCD image sensor 110 is exemplified as the imaging device, but the present invention is not limited to this. For example, it may be composed of a CMOS image sensor or an NMOS image sensor.

  The present invention can be applied to an interchangeable lens camera system. Specifically, it can be applied to a digital still camera or a movie.

1 is a block diagram of a camera system according to a first embodiment. Flow chart for explaining transition from normal mode to power save mode Flow chart for explaining the transition from power save mode to normal mode Schematic diagram of relationship information between focus lens and zoom lens

Explanation of symbols

100 Camera Body 110 CCD Image Sensor 111 AD Converter 112 Timing Generator 120 LCD Monitor 130 Release Button 140 Camera Controller 141 DRAM
142 Flash Memory 150 Body Mount 160 Power Supply 170 Card Slot 171 Memory Card 200 Interchangeable Lens 210 Zoom Lens 211 Drive Mechanism 212 Detector 220 OIS Lens 221 Actuator 222 Position Detection Sensor 223 OIS IC
230 Focus lens 233 Focus motor 240 Lens controller 241 SRAM
242 Flash memory 243 Counter 250 Lens mount 260 Aperture 261 Aperture motor

Claims (6)

A camera system comprising a camera body and an interchangeable lens,
The interchangeable lens is
A lens that moves along the optical axis;
Driving means for driving the lens;
Detecting means for detecting the state of the lens;
Lens-side notification means for notifying the camera body of state information related to the state detected by the detection means;
Lens-side control means for controlling the interchangeable lens,
The camera body is
Supply means for supplying power to the interchangeable lens;
Stop means for stopping the supply of power by the supply means;
Command notification means for notifying the interchangeable lens of a power stop notice command to stop power supply by the stop means;
Storage means for storing information;
Body-side control means for controlling the camera body,
The lens-side control means controls the detection means to detect the state of the lens in response to obtaining a power stop notice command from the command notification means, and provides status information regarding the detected state to the camera body. Control the lens-side notification means to notify
The body-side control unit controls the storage unit to store the acquired state information in response to acquiring the state information from the lens-side notification unit, and then stops supplying power to the interchangeable lens. Controlling the stopping means to
Camera system. The lens-side control unit controls the driving unit to move the lens to a predetermined position after controlling the detection unit to detect the state of the lens.
The camera system according to claim 1. The state information is information related to the position of the lens.
The camera system according to claim 1 or 2. The state information is information relating to a moving direction when the lens has moved immediately before.
The camera system according to claim 1. The camera body is
A body-side notification means for notifying the interchangeable lens of the state information stored in the storage means after the supply of power by the supply means;
The lens-side control unit controls the driving unit to drive the lens in response to obtaining state information from the body-side notification unit.
The camera system according to claim 1. The camera body is
A determination unit that determines whether or not the mounted interchangeable lens is the same as the interchangeable lens that was mounted when the state information stored in the storage unit is acquired;
The body-side notification means switches whether to notify the state information to the interchangeable lens according to a determination result by the determination means.
The camera system according to claim 1.

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