SLVAFI8 February 2023 TLC6C5748-Q1
In most cases, a local dimming system consists of at least two PCB boards, one is the system board and the other is LED board for backlight. Some designs even have more PCB counts. This architecture could lead to long cables (mostly FPC or FFC) and multiple connector contacts, which introduces relatively high parasitic inductance along the signal path. When the driving current of the high frequency communication signals flowing through, the parasitic inductance could be equalized as an AC noise source. This is one of the dominant reasons of excessive radiated emission.
Minimized PCB counts and connector counts should be considered during the top-level architecture floor planning. Besides, cables and connectors with shield are also recommended to decrease the radiated emission.