Timing Controller Signal Path Abnormality Detection

The patent applies preliminary action by generating a test signal before normal operation to inspect the transmission path. The inspection signal is generated in advance and sent through the scanning circuit to detect abnormalities before they affect normal display operation. This allows the system to perform self-diagnosis without requiring external inspection equipment.

The patent implements feedback by comparing the original inspection signal with the signal after it has passed through the transmission path. The delay output unit measures the delay time of the returned signal, and the error output unit compares this delay with a threshold value to generate an error signal when abnormalities are detected. This closed-loop feedback mechanism enables automatic detection and reporting of transmission path issues.

The patent applies universality by making the timing controller perform multiple functions: both normal display signal processing and self-inspection of the transmission path. The same controller that generates timing signals for display also generates inspection signals and processes the returned signals. This eliminates the need for separate inspection equipment, reducing overall system complexity while enabling continuous monitoring.

The patent implements self-service by enabling the timing controller to autonomously inspect its own transmission path without requiring external inspection equipment. The controller generates inspection signals, receives the returned signals, measures delay times, and generates error signals automatically. This self-diagnostic capability reduces the need for external maintenance and inspection infrastructure.