WO2018221558A1 - Caméra, et procédé de contrôle de communication associé - Google Patents

Caméra, et procédé de contrôle de communication associé Download PDF

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Publication number
WO2018221558A1
WO2018221558A1 PCT/JP2018/020679 JP2018020679W WO2018221558A1 WO 2018221558 A1 WO2018221558 A1 WO 2018221558A1 JP 2018020679 W JP2018020679 W JP 2018020679W WO 2018221558 A1 WO2018221558 A1 WO 2018221558A1
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WO
WIPO (PCT)
Prior art keywords
communication
camera
microcomputer
request
data
Prior art date
Application number
PCT/JP2018/020679
Other languages
English (en)
Japanese (ja)
Inventor
岳志 米澤
Original Assignee
キヤノン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by キヤノン株式会社 filed Critical キヤノン株式会社
Priority claimed from JP2018102903A external-priority patent/JP6479242B2/ja
Publication of WO2018221558A1 publication Critical patent/WO2018221558A1/fr

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
    • G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/56—Accessories
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules

Definitions

  • the camera system includes a camera that can be used in a state where a plurality of accessory devices are connected, and an accessory device among the plurality of accessory devices.
  • the camera performs communication using a signal transmission channel used for signal transmission between the camera and the plurality of accessory devices and a data communication channel used for data communication between the camera and the plurality of accessory devices. It has a camera control unit to control.
  • the accessory device includes an accessory control unit that controls communication performed using the signal transmission channel and the data communication channel.
  • the accessory control unit can output a signal for a request to the camera in the signal transmission channel, and the camera control unit can hold information on the request for each of the plurality of accessory devices.
  • a response communication to the request is performed in the data communication channel to the accessory device selected based on the information.
  • communication is performed between the camera 200, the interchangeable lens 100, and the adapter 300 using a plurality of communication methods.
  • the camera 200, the interchangeable lens 100, and the adapter 300 transmit control commands and data (information) through their respective communication units.
  • each communication unit supports a plurality of communication methods, and by switching to the same communication method in synchronization with each other according to the type of data to be communicated and the purpose of communication, optimal communication for various situations A method can be selected.
  • a camera microcomputer 205 serving as a camera control unit controls the camera 200 in response to input from camera operation members such as an imaging instruction switch (not shown) and various setting switches.
  • the camera microcomputer 205 transmits a control command related to a zooming operation of the zoom lens 102 to the lens microcomputer 111 according to an operation of a zoom switch (not shown) via a camera communication unit 208 including a communication interface circuit.
  • the camera microcomputer 205 transmits, via the camera communication unit 208, a control command related to the light amount adjustment operation of the diaphragm unit 114 according to the luminance information and the focus adjustment operation of the focus lens 104 according to the focus information to the lens microcomputer 111.
  • each of the camera microcomputer 205, the lens microcomputer 111, and the adapter microcomputer 302 can confirm that the signal level of the signal line CS becomes Hi after releasing the Low output to the signal line CS.
  • Each of the camera microcomputer 205, the lens microcomputer 111, and the adapter microcomputer 302 confirms that the signal level of the signal line CS has become Hi, and thus completes the current communication process and is ready for the next communication. Can be judged.
  • the camera 200 as the communication master designates (selects) one interchangeable lens 100 (specific accessory device) to communicate from the interchangeable lens 100 as the communication slave and the adapter 300, and data is transmitted only to the designated communication slave. Is one-to-one communication (individual communication).
  • This P2P communication is also performed using the signal line CS and the signal line DATA.
  • a communication mode in which P2P communication is performed is also referred to as a P2P communication mode (second communication mode).
  • next P2P communication data is transmitted and received between the camera microcomputer 205 and the lens microcomputer 111 according to the procedure described in FIG.
  • the camera microcomputer 205 transmits 2-byte data to the lens microcomputer 111, and then the lens microcomputer 111 transmits 3-byte data to the camera microcomputer 205.
  • the camera microcomputer 205 waits until the signal line CS becomes Hi in step S116.
  • the camera microcomputer 205 determines in step S117 whether or not the lens microcomputer 111 or the adapter microcomputer 302 has been designated as a communication partner for P2P communication based on the data transmitted in step S103. If the lens microcomputer 111 and the adapter microcomputer 302 are not designated as communication partners, the camera microcomputer 205 ends the process as it is, and if any is designated, the camera microcomputer 205 shifts to the P2P communication mode in step S118.
  • the lens microcomputer 111 and the adapter microcomputer 302 confirm whether or not the signal line CS has become Hi in step S203.
  • the lens microcomputer 111 and the adapter microcomputer 302 prohibit data reception from the signal line DATA in step S204 and end the processing. This is processing for a communication slave not designated as a communication partner of P2P communication to respond to Low output to the signal line CS by P2P communication between the camera microcomputer 205 and another communication slave.
  • step S609 the camera microcomputer 205 determines in step S310 that data transmission from the specific microcomputer has been completed, and analyzes the data received from the signal line DATA.
  • step S409 the specific microcomputer operates the input / output changeover switch (1122 or 3032) to connect the signal line DATA to the data input unit. Thereafter, the specific microcomputer turns off (cuts off) the ground switch (1121 or 3031) in step S410 to cancel the Low output to the signal line CS.
  • the lens microcomputer 111 or the adapter microcomputer 302 may output Low to the signal line CS for a communication request.
  • the camera microcomputer 205 cannot detect that the lens microcomputer 111 or the adapter microcomputer 302 has output Low to the signal line CS. For this reason, the camera microcomputer 205 may notify the lens and adapter microcomputers 111 and 302 of a permission notification permitting them to output a communication request for starting broadcast communication.
  • broadcast communication for simultaneously transmitting data from the camera microcomputer 205 as a communication master to the lens microcomputer 111 and the adapter microcomputer 302 as communication slaves can be started from the communication slave. This eliminates the need for the camera microcomputer 205 to constantly communicate with the lens microcomputer 111 and the adapter microcomputer 302, thereby reducing wasted communication and reducing the amount of communication.
  • step S501C the camera microcomputer 205 requests the adapter microcomputer 302 to transmit communication request function information using P2P communication.
  • adapter microcomputer 302 which is a designated slave, receives a transmission request for communication request function information in step S501A.
  • the lens microcomputer 111 that is not a designated slave does not receive P2P communication.
  • the information related to the request in this embodiment is communication request permission / rejection information indicating permission and prohibition of communication request output to the lens microcomputer 111 and the adapter microcomputer 302 which are communication slaves by the camera microcomputer 205 which is a communication master.
  • Communication when the lens microcomputer 111 and the adapter microcomputer 302 are shifted from the active state to the sleep state will be described.
  • Communication when the camera microcomputer 205 shifts the lens microcomputer 111 and the adapter microcomputer 302 from the active state to the sleep state is performed by broadcast communication.
  • the camera microcomputer 205 which is a communication master, executes broadcast communication according to the procedure described in FIG. What is transmitted to the lens microcomputer 111 and the adapter microcomputer 302 by this broadcast communication is sleep instruction data for shifting these from the active state to the sleep state.
  • FIG. 13A shows an example in which the lens microcomputer 111 and the adapter microcomputer 302 shift from the sleep state to the active state by broadcast communication started from the camera microcomputer 205.
  • the lens microcomputer 111 and the adapter microcomputer 302 in the sleep state may request the camera microcomputer 205 to output active instruction data for instructing the shift to the active state.
  • the request for outputting the active instruction data to the camera microcomputer 205 is hereinafter referred to as a sleep release request.
  • FIG. 13B shows an example in which the lens microcomputer 111 outputs a sleep release request.
  • the lens microcomputer 111 when a transition event to the active state is generated by a user operation in the sleep state, the lens microcomputer 111 outputs a Low to the signal line CS to output a sleep release request to the camera microcomputer 205. Thereafter, the camera microcomputer 205 performs broadcast communication according to the procedure described in FIG. 9 and transmits active instruction data to the lens microcomputer 111 and the adapter microcomputer. Thereby, the lens microcomputer 111 and the adapter microcomputer 302 shift to the active state.
  • step S1005L the lens microcomputer 111 transmits the completion of setting of the sleep release request permission to the camera microcomputer 205 using P2P communication, and ends the process.
  • the camera microcomputer 205 receives the completion of setting of the sleep release request permission in the lens microcomputer 111 in step S1005C, and ends the process.
  • step S1103L the lens microcomputer 111 transmits operation ring change presence information as a communication request factor to the camera microcomputer 205 using P2P communication.
  • the camera microcomputer 205 receives operation ring change presence information in step S1103C.
  • the camera microcomputer 205 receives information on the presence / absence of a function for outputting a wake-up request from each communication slave and information on the cause of the wake-up request, and permits and prohibits the output of the sleep wake-up request to a necessary communication slave. May be transmitted.
  • the camera microcomputer 205 can change the function assignment according to the operation of the operation ring 130, permission and prohibition of the output of the sleeve release request may be switched according to the function assignment status. Specifically, when there is no function assignment according to the operation of the operation ring 130, it is not necessary to perform activation (wakeup) processing by operating the operation ring 130. For this reason, the output of the sleep release request of the lens microcomputer 111 can be prohibited. As a result, useless communication can be reduced and the communication amount can be reduced.
  • the first communication is communication performed via the communication unit 131 and the communication unit 209.
  • the communication unit 131 performs communication via the notification channel CS1, the data communication channel DCL, and the data communication channel DLC based on an instruction from the lens microcomputer 111, and the communication unit 209 based on an instruction from the camera microcomputer 205.
  • the communication unit 131 and the communication unit 209 set the voltage level of the notification channel CS1, the communication rate (data amount per unit time) and communication voltage in asynchronous communication. Further, in response to an instruction from the lens microcomputer 111 or the camera microcomputer 205, data is transmitted / received via the data communication channel DCL and the data communication channel DLC.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Devices (AREA)
  • Structure And Mechanism Of Cameras (AREA)

Abstract

L'invention vise à réduire la charge de communication d'une caméra qui exécute une communication avec une pluralité de dispositifs accessoires en même temps. Une caméra 200 selon l'invention comprend une unité de contrôle de caméra 205 qui contrôle la communication avec une pluralité de dispositifs accessoires 100, 300 via un canal de transmission de signal CS utilisé pour la transmission d'un signal entre la caméra et la pluralité de dispositifs accessoires et un canal de communication de données DATA utilisé pour la communication de données entre la caméra et la pluralité d'accessoires. L'unité de contrôle de caméra peut stocker des informations relatives à une demande faite à la caméra par la pluralité de dispositifs accessoires. En réponse à la détection, par l'unité de contrôle de caméra, d'un signal délivré en sortie, d'après la demande émanant de l'un quelconque de la pluralité de dispositifs accessoires sur le canal de transmission de signal, l'unité de contrôle de caméra exécute une communication pour répondre à la demande, sur le canal de communication de données, une telle communication étant exécutée avec un dispositif accessoire sélectionné sur la base des informations.
PCT/JP2018/020679 2017-05-31 2018-05-30 Caméra, et procédé de contrôle de communication associé WO2018221558A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2017107266 2017-05-31
JP2017-107266 2017-05-31
JP2018-102903 2018-05-30
JP2018102903A JP6479242B2 (ja) 2017-05-31 2018-05-30 カメラおよびその通信制御方法

Publications (1)

Publication Number Publication Date
WO2018221558A1 true WO2018221558A1 (fr) 2018-12-06

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PCT/JP2018/020679 WO2018221558A1 (fr) 2017-05-31 2018-05-30 Caméra, et procédé de contrôle de communication associé

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020024379A (ja) * 2018-07-31 2020-02-13 キヤノン株式会社 撮像装置、アクセサリ、中間アクセサリ及びこれらの制御方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09211653A (ja) * 1996-01-31 1997-08-15 Minolta Co Ltd レンズ交換可能なカメラ
JP2011175024A (ja) * 2010-02-23 2011-09-08 Canon Inc アクセサリ
JP2012037692A (ja) * 2010-08-06 2012-02-23 Canon Inc カメラシステムの中間アクセサリおよびカメラシステム
JP2013068655A (ja) * 2011-09-20 2013-04-18 Nikon Corp アダプター、カメラシステム、および、アダプター制御プログラム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09211653A (ja) * 1996-01-31 1997-08-15 Minolta Co Ltd レンズ交換可能なカメラ
JP2011175024A (ja) * 2010-02-23 2011-09-08 Canon Inc アクセサリ
JP2012037692A (ja) * 2010-08-06 2012-02-23 Canon Inc カメラシステムの中間アクセサリおよびカメラシステム
JP2013068655A (ja) * 2011-09-20 2013-04-18 Nikon Corp アダプター、カメラシステム、および、アダプター制御プログラム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020024379A (ja) * 2018-07-31 2020-02-13 キヤノン株式会社 撮像装置、アクセサリ、中間アクセサリ及びこれらの制御方法

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