Patent ID: 6262759
Filing Date: 2001-07-17
Classification: G06K,H04N

Abstract:
An image forming apparatus comprising:interface means for transmitting a horizontal synchronizing signal to an image signal generating apparatus, and for receiving an image signal transmitted from said image signal generating apparatus in response to the horizontal synchronizing signal;cyclic signal generating means for generating a cyclic signal synchronized with a horizontal-scanning operation; andmeans for inhibiting transmission of the generated cyclic signal as the horizontal synchronizing signal to said image signal generating apparatus via said interface means before a first timing and allowing transmission of the generated cyclic signal as the horizontal synchronizing signal to said image signal generating apparatus via said interface means after the first timing, to instruct said image signal generation apparatus to transmit the image signal on a timing of a vertical synchronizing signal without transmitting said vertical synchronizing signal independent from said horizontal synchronizing signal to said image signal generating apparatus via said interface means.