Image Pickup Device Reset Cancellation Timing

The patent segments the pixel array into multiple rows and implements independent reset control for each row. The control signal generation unit generates row-specific reset control signals that can be independently timed, allowing the reset cancellation in one row to occur without affecting the signal readout from other rows. This segmentation resolves the contradiction by enabling productivity improvement through flexible reset cancellation while preserving signal accuracy through row-isolated control.

The patent implements preliminary action by completing the reset cancellation of the photodiode in a different row before initiating the A/D conversion process for the current row. The control signal generation unit is configured to generate the reset control signal such that the reset cancellation occurs in advance, ensuring that no signal changes occur during the critical A/D conversion period. This preliminary timing arrangement resolves the contradiction by maintaining signal stability while optimizing time efficiency.