Granted Patent B2

US 12,395,730 · App. 18/316,459 · Granted Aug 19, 2025

Inventor: Atsushi Sugita (Kanagawa, JP)

Assignee: CANON KABUSHIKI KAISHA

H04N23/663G03B17/14G03B17/18H04N23/66

Abstract

Claims (33)

1. An accessory apparatus connectable to an imaging apparatus, the accessory apparatus comprising:

an operation member configured to allow an operation by a user;

a first communication line configured to communicate with the imaging apparatus and a second communication line, which is different from the first communication line, configured to communicate with the imaging apparatus;

at least one processor; and

at least one memory coupled to the at least one processor storing instructions that, when executed by the at least one processor, cause the at least one processor to function as a communication control unit configured to change a signal level of the second communication line from a first signal level to a second signal level different from the first signal level,

wherein the communication control unit is configured:

after receiving a data indicating a communication partner of the imaging apparatus and first data that are transmitted via the first communication line after the change in the signal level of the second communication line to the second signal level, to transmit second data via the first communication line; and

after receiving third date that is transmitted via the first communication line after transmitting the second data, to transmit fourth data via the first communication line, and

wherein the communication control unit is configured to transmit information about an operation amount of the operation member by transmitting the fourth data.

2. The accessory apparatus according to claim 1 , wherein the first data indicates a transmission request of a reason for the change of the signal level of the second communication line to the second signal level.

3. The accessory apparatus according to claim 1 , wherein the second data indicates that the operation on the operation member.

4. The accessory apparatus according to claim 1 , wherein the third data indicates a transmission request of an operation amount of the operation member.

5. The accessory apparatus according to claim 1 , wherein the fourth data indicates an operation state of the operation member.

6. An imaging apparatus to which an accessory apparatus is connectable along with an interchangeable lens apparatus, the accessory apparatus including an operation member allowing an operation by a user, the imaging apparatus comprising:

a first communication line configured to communicate with the accessory apparatus and a second communication line, which is different from the first communication line, configured to communicate with the accessory apparatus;

at least one processor; and

at least one memory coupled to the at least one processor storing instructions that, when executed by the at least one processor, cause the at least one processor to function as a communication control unit configured:

to transmit a data indicating a communication partner of the imaging apparatus and first data via the first communication line after a change in a signal level of the second communication line from a first signal level to a second signal level different from the first signal level, and

after receiving second data that is transmitted via the first communication line after transmitting the first data, to transmit third data via the first communication line, and

wherein the communication control unit is configured to receive information about an operation amount of the operation member by receiving fourth data that is transmitted via the first communication line after transmitting the third data.

7. The imaging apparatus according to claim 6 , wherein the first data indicates a transmission request of a reason for the change of the signal level of the second communication line to the second signal level.

8. The imaging apparatus according to claim 6 , wherein the second data indicates that the operation on the operation member.

9. The imaging apparatus according to claim 6 , wherein the third data indicates a transmission request of an operation amount of the operation member.

10. The imaging apparatus according to claim 6 , wherein the fourth data indicates an operation state of the operation member.

11. A control method of an accessory apparatus connectable to an imaging apparatus, the accessory apparatus including an operation member allowing an operation by a user, a first communication line configured to communicate with the imaging apparatus, and a second communication line, which is different from the first communication line, configured to communicate with the imaging apparatus, the control method comprising:

changing of a signal level of the second communication line from a first signal level to a second signal level different from the first signal level,

after receiving a data indicating a communication partner of the imaging apparatus and first data that are transmitted via the first communication line after the change in the signal level of the second communication line to the second signal level, transmitting second data via the first communication line, and

after receiving third data that is transmitted via the first communication line after transmitting the second data, transmitting the fourth data, and

wherein transmitting information about an operation amount of the operation member by transmitting the fourth data.

12. A control method of an imaging apparatus to which an accessory apparatus is connectable along with an interchangeable lens apparatus, the accessory apparatus including an operation member allowing an operation by a user, the imaging apparatus including a first communication line configured to communicate with the accessory apparatus and a second communication line, which is different from the first communication line, configured to communicate with the accessory apparatus, the control method comprising:

transmitting a data indicating a communication partner of the imaging apparatus and first data via the first communication line after a change in a signal level of the second communication line from a first signal level to a second signal level different from the first signal level,

after receiving second data that is transmitted via the first communication line after transmitting the first data, transmitting third data via the first communication line, and

receiving information about an operation amount of the operation member by receiving fourth data that is transmitted via the first communication line after transmitting the third data.

Priority Claims (2)

Continuity (3)

References Cited (38)