Abstract
Visible light communication (VLC) using LEDs has generated strong research interest recently [1, 2]. Many existing LEDs in display applications can be employed as transmitters for the further deployment of VLC. The first active matrix LED (AMLED) micro-display with an embedded VLC transmitter was reported in [2], with a 5-Mb/s modulation bit rate. This paper presents an AMLED system, consisting of a proposed CMOS pixel driver and a flip-chip bonded blue gallium nitride (GaN) micro-LED (μLED) array with 36×64 pixels of 40×40 μm2, for simultaneous display and VLC applications. Measurement results show that the proposed pixel driver can achieve a 20-Mb/s bit rate at 10 cm, which is four times as large as the 5-Mb/s modulation bit rate in [2].
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