A Novel Method of Integrating Visible Light Communications within LED Drivers

Pawlikowski, Warren; Narimani, Mehdi; Hranilovic, Steve

doi:10.1109/glocomw.2017.8269143

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Unlike [9]- [11] where the entire load current is being supplied by pulsed current, in this work the pulsed current flowing through the LECDs is just a small portion of the load leading to lower EMI and junction temperature. This paper extends our earlier conference paper [21] which considered only buck converters. Here, this concept of LECDs is extended to both buck and boost converters for use as VLC transmitters and further analysis of the systems presents design considerations for various operating conditions as well as communication performance results.…”

Section: Introductionsupporting

confidence: 62%

“…The underlying concept of the topology proposed in [9], where the Schottky diode of the driver is replaced with a white led and the output is short circuited, is similar to that of our earlier conference paper [21] and both were developed simultaneously. However, the concept in [9] was presented for LED drivers solely being used for illumination purposes, aiming to reduce the complexity of the circuit and maintaining a high efficacy.…”

Section: Introductionmentioning

confidence: 99%

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Light-Emitting Commutating Diodes for Optical Wireless Communications Within LED Drivers

et al. 2020

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Although visible light communication (VLC) systems provide high density links for use in Internet-of-Things (IoT) devices, the design of high rate VLC transmitters that maintain luminaire efficacy is an open problem. In this article, a novel approach to the integration of VLC within light-emitting diode (LED) drivers is proposed through the replacement of freewheeling/blocking diodes with light-emitting devices termed a light-emitting commutating diodes (LECDs). In this manner, communications and illumination can be provided using a simple, cost effective design while employing no additional components. The subtle change of LED driver control signals facilitates the transmission of data from LECDs while simultaneously supporting illumination functions. Lighting controls such as dimming are maintained and combined with modulation through the use of overlapping pulse position modulation (OPPM) and performance is quantified. Prototype buck and boost converters with LECDs are implemented and their efficacy is measured. Though current commercial LEDs are not intended for such signalling applications, we experimentally demonstrate their feasibility in this application and suggest methods to make such converters reliable. It is demonstrated that the addition of an LECD improves the efficacy of the luminaire as compared to conventional LED drivers while simultaneously enabling a VLC downlink.

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Section: Introductionsupporting

confidence: 62%