In-Cell Touch Panel Noise Reduction via Frame Synchronization

The patent applies periodic action by synchronizing the touch sensor reading operation with the display frame period. The touch sensor reads touch data at specific timing points within each frame, creating a periodic reading pattern that avoids random noise interference and improves signal stability.

The patent converts the harmful noise from TFT operations into a beneficial pattern by synchronizing touch reading with display frames. The noise that would normally be random and harmful is transformed into a predictable, periodic signal that can be synchronized with and separated from the touch reading operation, effectively eliminating its harmful effects.

The patent implements periodic action by restricting touch data reading to specific timing points synchronized with display frames. Instead of continuous reading, the system performs discrete readings at predetermined intervals within each frame, which maintains responsive touch detection while avoiding the noise periods when TFTs are active.

The patent applies preliminary action by determining the optimal reading timing in advance based on the display frame structure. The system pre-calculates when to read touch data relative to the frame timing, ensuring that readings occur before or after the noisy TFT operation periods, thus preventing noise contamination before it can affect the measurement.