SI Considerations in Flexible Channels on High-Speed Intra-Panel Interface for Large-Size Flat Panel Display Applications

In large-size flat panel display modules for TV applications, signaling channels designed on flexible printed circuit (FPC) cable or chip-on-film (COF) package are incomparably shorter than source PCBs, but they can play a significant role in determining overall signal integrity (SI) performance. This work analyzes interconnection designs on FPC cable and COF package in terms of impedance matching and crosstalk. It also provides channel design considerations and design guidelines for better SI performance in flexible channels on high-speed interface for large-size LCD TV applications.