Image Sensor Focus Detection Pixel Arrangement

The patent uses color interpolation to generate imaginary pixels at positions where focus detection pixels are not physically present. By copying and interpolating color information from surrounding pixels, the system creates virtual focus detection data at all necessary positions without requiring physical pixels at every location, thus maintaining focus detection accuracy while reducing device complexity

The patent transitions from a one-dimensional arrangement of focus detection pixels to a two-dimensional color space by introducing color interpolation. This allows the system to generate focus detection information at positions beyond the physical pixel locations by utilizing color relationships in the two-dimensional color space, effectively solving the contradiction between pixel arrangement density and processing complexity

Instead of requiring physical focus detection pixels at every successive position, the system copies color information from existing pixels and generates imaginary pixels through interpolation. This copying approach provides focus detection data at all successive positions without the need for additional physical pixels, maintaining accuracy while controlling complexity

The patent makes existing pixels serve multiple functions: they act as both image-capturing pixels and source pixels for color interpolation. This multi-functionality allows the system to generate focus detection information at successive positions using the same physical pixels for both imaging and focus detection purposes, reducing the need for dedicated focus detection pixels at every position