Patent ID: 8941774
Filing Date: 2015-01-27
Classification: G03B,H04N

Abstract:
1. An imaging apparatus to which an accessory is detachably attached, said accessory including an optical member, the imaging apparatus comprising: a signal generation unit configured to generate a vertical synchronizing signal and output the generated vertical synchronizing signal; an imaging unit configured to accumulate charges in synchronization with the vertical synchronizing signal and output an imaging signal; a control unit configured to generate a clock signal and control data communication with the accessory based on the clock signal; a first terminal for sending the clock signal to the accessory; and a second terminal for communicating data with the accessory, wherein the control unit communicates with the accessory via the second terminal, predetermined bytes of data in synchronization with charge accumulation by the imaging unit, and notifies timing at which the vertical synchronizing signal is output using the clock signal via the first terminal by changing a signal level of the first terminal after the control unit communicates the predetermined bytes of data and subsequently a predetermined time lapses while the signal level is kept at a predetermined level, and controls the accessory to drive the optical member based on the timing; the accessory notifies a busy state, in which the data communication is impossible, by changing a signal level of the first terminal and in which the control unit does not send the clock signal.