Fast GaN μLED Pixel for Visible Light Communication Matrix Emitter

Abstract

Galium nitride (GaN) based Light-emitting diodes (LEDs) are known for their high brightness and high-speed commutation capability. Not surprisingly, GaN μLEDs are often used in LED based visible light communication (VLC) systems, due to the large modulation bandwidth they can offer. Although VLC emitters are commonly built with a single LED, using a matrix of μLED as the light source can have some advantages as higher linearity. In this paper, the design of a fast GaN μLED pixel driver dedicated to matrix emitters is discussed. This pixel driver can reach a 333 Mhz frame rate with its maximum bias current of 384 $\mu\mathrm{A}$.