Patent ID: 11953840
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 1:
2. The image forming apparatus according to claim 1, further comprising:
a first generation unit configured to generate a common leading edge signal to be a reference for a leading edge of each page in the direction corresponding to the direction of rotation of the first photosensitive drum and a reference for a leading edge of each page in a direction corresponding to a direction of rotation of the second photosensitive drum;
a holding unit configured to hold a first delay time from an output timing of the common leading edge signal until a write start timing of the image corresponding to the first color and a second delay time from an output timing of the common leading edge signal until a write start timing of the image corresponding to the second color; and
a second generation unit configured to generate a first individual leading edge signal indicating the write start timing of the first photosensitive drum by applying the first delay time on the output timing of the common leading edge signal and generate a second individual leading edge signal indicating the write start timing of the second photosensitive drum by applying the second delay time on the output timing of the common leading edge signal,
wherein the first generation unit changes the period of the first synchronization signal using the first individual leading edge signal as a reference, and the second generation unit changes the period of the second synchronization signal using the second individual leading edge signal as a reference.