Stacked Solid State Image Sensor with TOF Distance Detection

The patent divides the image sensor into multiple regions with different functions: some regions use contrast detection for precise focusing, while other regions simultaneously acquire distance data through TOF measurement. This segmentation allows the system to obtain focus information without requiring exhaustive contrast analysis across the entire image area, thereby reducing processing time while maintaining focusing precision.

The patent introduces distance information as an intermediary parameter to assist the focus adjustment process. By using TOF (time of flight) distance data from specific regions, the system can predict optimal focus positions and reduce the search space for contrast detection, thereby achieving precise focusing faster without relying solely on time-consuming contrast analysis across the whole image.

The patent segments the observation object into multiple regions and assigns different measurement functions to different regions. Some regions are designated for contrast detection while others are designated for TOF distance measurement. This allows simultaneous acquisition of both image data and distance data across different areas, enabling complete observation coverage without requiring sequential repeated operations, thereby significantly improving scanning productivity.

The patent enables continuous simultaneous acquisition of image data and distance data by operating multiple regions in parallel. While contrast detection regions continuously capture image information, TOF regions continuously measure distance, eliminating the need to stop and repeat operations. This continuous parallel operation maintains complete observation coverage while dramatically increasing scanning speed and productivity.

The patent combines multiple functions (image capture, distance measurement, focus detection) into a single stacked sensor structure. By integrating TOF sensors, image sensors, and focus detection elements in a vertically stacked arrangement, the system achieves enhanced adaptability and versatility for simultaneous multi-parameter acquisition. While the structural complexity increases, the functional integration reduces the need for separate components and simplifies the overall system architecture.

The stacked sensor structure implements multi-functionality where the same physical sensor assembly performs multiple tasks: image capture through image sensors, distance measurement through TOF sensors, and focus detection through dedicated focus detection regions. This universal design allows a single device to acquire diverse data types simultaneously, greatly enhancing adaptability without requiring multiple separate devices or complex external measurement systems.