US 11,689,802 B2
Accessory apparatus and imaging apparatus
Atsushi Sugita, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 12, 2020, as Appl. No. 17/96,047.
Application 17/096,047 is a continuation of application No. 15/992,356, filed on May 30, 2018, granted, now 10,873,691.
Claims priority of application No. 2017-107961 (JP), filed on May 31, 2017; and application No. 2018-096870 (JP), filed on May 21, 2018.
Prior Publication US 2021/0067682 A1, Mar. 4, 2021
Int. Cl. H04N 5/232 (2006.01); G03B 17/14 (2021.01); G03B 17/18 (2021.01)
CPC H04N 5/23209 (2013.01) [G03B 17/14 (2013.01); G03B 17/18 (2013.01); H04N 5/23203 (2013.01)] 29 Claims
OG exemplary drawing
 
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, in response to detection of the operation on the operation member, 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:
in response to reception of first data that is transmitted via the first communication line in response to the change in the signal level of the second communication line to the second signal level, to transmit second data corresponding to a start of the operation on the operation member via the first communication line; and
in response to reception, via the first communication line, of third data that corresponds to a transmission request for fourth data corresponding to an operation amount of the operation member, to transmit the fourth data, and
wherein the communication control unit is configured to transmit the fourth data after transmitting the second data, and receive the third data after receiving the first data.