Camera Module With Transparent Plate And Light-Cutting Layer

The patent divides the image sensor into distinct regions: phase difference detection pixels for autofocus and regular phot-sensitive pixels for image capture. This segmentation allows each region to perform its specific function without interfering with the other, resolving the contradiction between autofocus speed and photosensitivity.

The patent applies different optical properties to different regions of the sensor. The phase difference detection pixels are positioned to receive light at specific angles for focus detection, while the regular phot-sensitive pixels are optimized for capturing visible light for image formation. This local differentiation maintains high photosensitivity in the imaging regions while enabling fast autofocus through dedicated phase detection pixels.

The patent extracts the phase difference detection function from a separate autofocus sensor and integrates it directly into the image sensor structure. This eliminates the need for a beam splitter that would divert light away from the image sensor, thereby maintaining full photosensitivity for image capture while still enabling phase difference detection through the integrated pixels.

The patent merges the phase difference detection pixels with the image sensor in a single integrated structure. Both functions (autofocus and imaging) share the same light-receiving surface without requiring light separation, allowing the full incident light to contribute to image formation while a portion is simultaneously used for phase difference detection, thus preserving photosensitivity.