Patent ID: 7889239

Claim:
An imaging system comprising an imaging device for producing images of objects and picture signals and an imaging controller connected to the imaging device through a transmission line, wherein the imaging device includes a vertical synchronizing signal-producing circuit to produce an internal vertical synchronizing signal for the production of images of objects; wherein the imaging controller includes a delay-measuring circuit and a vertical-synchronization phase-advancing circuit; wherein the imaging controller transmits a test signal to the imaging device and receives the test signal returned from the imaging device, and the delay-measuring circuit measures a delay of a phase of the returned test signal relative to a phase of the transmitted test signal; wherein the vertical-synchronization phase-advancing circuit advances a phase of an external vertical synchronizing signal by the delay and transmits the external vertical synchronizing signal to the imaging device; and wherein the vertical synchronizing signal-producing circuit is reset by the external vertical synchronizing signal having the advanced phase that is transmitted from the vertical-synchronization phase-advancing circuit, the vertical synchronizing signal-producing circuit generating, based on the reset, an internal vertical synchronizing signal that is synchronized with the external vertical synchronizing signal having the advanced phase that is transmitted from the vertical-synchronization phase-advancing circuit, the internal vertical synchronizing signal transmitted to the imaging controller to form a delayed internal vertical synchronizing signal such that the delayed internal vertical synchronizing signal and the external vertical synchronizing signal are synchronized without manual phase adjustment regardless of varying the imaging device and imaging controller distance.