Display Panel Fault Detection Circuit for Pixel Verification

The patent applies preliminary action by performing detection on the substrate before the electronic paper is completed and sealed. The detection circuit is integrated on the substrate layer, allowing fault detection to occur during the manufacturing process rather than after the product is finished. This prevents damage to pixel units and integrated circuits that would occur if detection required accessing the sealed final product.

The patent introduces an intermediary detection circuit that is integrated on the substrate between the pixel units and the external environment. This intermediary structure allows detection signals to be transmitted through the data lines and scan lines without requiring disassembly of the finished product, thus avoiding damage to delicate components while still enabling reliable fault detection.

The patent applies local quality by dividing the detection function into two specialized units with different roles. The first detection unit performs initial screening to identify potentially abnormal pixel units, while the second detection unit performs verification detection on the suspected units. This division of labor allows each unit to be optimized for its specific function, improving overall detection accuracy while keeping individual units relatively simple.

The detection system is segmented into two sequential stages: initial detection by the first unit and verification detection by the second unit. This segmentation allows the system to handle different aspects of detection separately, reducing the complexity of any single detection unit while achieving high overall accuracy through the combination of both units working together.