Adaptor device, imaging apparatus, and method for controlling same
AssigneeCanon Kabushiki Kaisha
InventorsToru Kohno, Takayuki Shu
Life of this patent
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Abstract
In a first communication mode, a control unit controls a signal level of one contact based on a first command received from an imaging apparatus via another contact and a signal level indicated by an accessory device via yet another contact. In a second communication mode, the control unit receives a second command indicating the second communication mode and data via another contact. After the reception, the control unit transmits the data via still another contact. The control unit controls communication in the second communication mode based on the signal level of the one contact and the second command.
Claims13
An adaptor device to be attached between an imaging apparatus and an accessory device, the adaptor device comprising:
- one or more circuits configured to function as:
- a control unit configured to control communication with the imaging apparatus via a first contact, a second contact, and a third contact, and communication with the accessory device via a fourth contact and a fifth contact,
- wherein the control unit has a first communication mode in which transmission of data via the fourth contact based on reception of data from the first contact or transmission of data via the second contact based on reception of data via the fifth contact is controlled, and a second communication mode which is different from the first communication mode, and is configured to receive, in the second communication mode, a second command and data via the first contact and then transmit the data via the fourth contact, and
- wherein the control unit is configured to communicate in the first communication mode, based on connection detection communication with the accessory device in the second communication mode and a first command corresponding to an instruction to enter the first communication mode.
An imaging apparatus to which an accessory device is attached via an adaptor device, the imaging apparatus comprising:
- one or more circuits configured to function as:
- a control unit configured to control communication with the adaptor device via a first contact, a second contact, and a third contact,
- wherein the control unit has a first communication mode in which communication with the accessory device via the adaptor device is controlled via the first contact and the second contact, and a second communication mode different from the first communication mode, and is configured to transmit, in the second communication mode, a second command and data via the first contact, and
- wherein the control unit is configured to communicate in the first communication mode based on connection detection communication with the accessory device in the second communication mode and transmission of a first command corresponding to an instruction to enter the first communication mode.
A method for controlling an adaptor device to be attached between an imaging apparatus and an accessory device, the method comprising:
- controlling communication with the imaging apparatus via a first contact, a second contact, and a third contact, and communication with the accessory device via a fourth contact and a fifth contact,
- wherein the controlling includes performing communication in a first communication mode in which transmission of data via the fourth contact based on reception of data from the first contact or transmission of data via the second contact based on reception of data via the fifth contact is controlled and communication in a second communication mode different from the first communication mode, and in the second communication mode, a second command and data are received via the first contact and then the data is transmitted via the fourth contact, and
- wherein the communication in the first communication mode is performed based on connection detection communication with the accessory device in the second communication mode and a first command corresponding to an instruction to enter the first communication mode.
A method for controlling an imaging apparatus to which an accessory device is attached via an adaptor device, the method comprising:
- controlling communication with the adaptor device via a first contact, a second contact, and a third contact,
- wherein the controlling includes performing communication in a first communication mode in which communication with the accessory device via the adaptor device is controlled via the first contact and the second contact and communication in a second communication mode different from the first communication mode, and in the second communication mode, a second command and data are transmitted via the first contact, and
- wherein the communication in the first communication mode is performed based on connection detection communication with the accessory device in the second communication mode and transmission of a first command corresponding to an instruction to enter the first communication mode.
Dependencies are inferred from the claim text.