Ranging Device Pixel Group Segmentation for Light Loss

The patent divides the pixel array into multiple groups, where each group is assigned a dedicated time counting unit. This segmentation ensures that each pixel group has its own time counter, preventing information loss that occurs when a single shared time counter is used across all pixels. The segmentation principle resolves the contradiction by sacrificing some device complexity to eliminate information loss.

The patent implements preliminary action by starting the time counting unit before the signal read operation begins. The time counter is initialized and counting starts in advance, so that when light enters a pixel during the read period, the time count value is already being updated. This ensures that no information about incident light is lost during the read process.

The patent segments the pixel array into multiple groups with dedicated time counting units for each group. This allows parallel processing of time count values across different pixel groups, reducing the total time required to capture light reception data while maintaining sequential readout simplicity within each group.

The patent ensures continuity of useful action by continuously updating time count values in the time counting units during the signal read period. The time counter keeps counting even as signals are being read out, so that light reception data is captured without interruption to the timing function.