Disclosed herein are various embodiments of methods, systems, and apparatus for increasing packet generation in a digital communication system. The first and substrate includes a plurality of pixel areas and a non-pixel area disposed adjacent to the pixel areas. If the total count exceeds a predetermined threshold, this indicates cable TV service whose signals will not require boosting. The light-masking area of lens cells adjacent to lens cells closest to an optical axis is made smaller than the light-masking area of other cells.