FLASH SYNCHRONISATION USING IMAGE SENSOR INTERFACE TIMING SIGNAL Russian patent published in 2014 - IPC H04N5/225 

FIELD: physics.

SUBSTANCE: image signal processing system 32 includes a flash controller 550 which is configured to activate a flash device prior to the start of a target image frame by using a sensor timing signal. In one version, the flash controller 550 receives a delayed sensor timing signal and determines a flash activation start time by using the delayed sensor timing signal to identify a time corresponding to the end of the previous frame, increasing that time by a vertical blanking time, and then subtracting a first offset to compensate for delay between the sensor timing signal and the delayed sensor timing signal. The flash controller 550 then subtracts a second offset to determine the flash activation time, thus ensuring that the flash is activated prior to receiving the first pixel of the target frame.

EFFECT: high quality of the formed image.

20 cl, 142 dwg, 5 tbl