Abstract
Visible light communication (VLC) is being explored as an alternative form of wireless transmission due the increasingly crowded radio frequency spectrum. The emergence of micro-LEDs which have significantly higher modulation bandwidths compared to conventional larger area LEDs is important as it not only enables VLC links with higher data rates but also opens up the possibility of VLC being deployed in displays, instead of just general illumination devices. Despite the high modulation bandwidth of micro-LEDs, this performance is often not realized at the system level due to the limited bandwidth of the driver. In this work, the performance of NMOS and PMOS active matrix driving circuits for micro-LED arrays is compared. Simulated results show that an NMOS active matrix driving circuit is able to achieve 4 times the modulation bandwidth of an equivalent PMOS circuit. The relationship between the LED structure and driving architecture in an integrated active matrix micro-LED system is discussed.