A Study of Illumination and Communication using Organic Light Emitting Diodes

Chun, Hyunchae; Chiang, Chien-Jung; Monkman, Andrew P.; O’Brien, Dominic

doi:10.1109/jlt.2013.2284247

Cited by 42 publications

(20 citation statements)

References 18 publications

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“…A record light converter-associated modulation bandwidth of 491 MHz was measured in our system, which is significantly greater than those of conventional nitride-based phosphors (3)(4)(5)(6)(7)(8)(9)(10)(11)(12) MHz) and organic polymers (200 MHz) 10 . The light source generates bright warm white light with high CRI -as much as 89 -and a correlated color temperature (CCT) of greater than 3200 K. To the best of our knowledge, this work reports the first VLC system with solution-processed perovskite NCs.…”

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confidence: 85%

Perovskite Nanocrystals as a Color Converter for Visible Light Communication

et al. 2016

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Visible light communication (VLC) is an emerging technology that uses light-emitting diodes (LEDs) or laser diodes for simultaneous illumination and data communication. This technology is envisioned to be a major part of the solution to the current bottlenecks in data and wireless communication. However, the conventional lighting phosphors that are typically integrated with LEDs have limited modulation bandwidth and thus cannot provide the bandwidth required to realize the potential of VLC. In this work, we present a promising light converter for VLC by designing solution-processed CsPbBr 3 perovskite nanocrystals (NCs) with a conventional red phosphor. The fabricated CsPbBr 3 NC phosphor-based white light converter exhibits an unprecedented modulation bandwidth of 491 MHz, which is ∼40 times greater than that of conventional phosphors, and the capability to transmit a high data rate of up to 2 Gbit/s. Moreover, this perovskiteenhanced white light source combines ultrafast response characteristics with a high color rendering index of 89 and a correlated color temperature of 3236 K, thereby enabling dual VLC and solid-state lighting functionalities.

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confidence: 85%

Perovskite Nanocrystals as a Color Converter for Visible Light Communication

et al. 2016

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“…Light-emitting diodes (LEDs) are expected to displace the existing conventional fluorescent and incandescent lighting devices and become the dominant lighting sources for indoor illumination owing to their higher power efficiency [1], [2]. As a further benefit, the optical intensity of LEDs can be modulated to transmit high-speed information with the aid of visible light communication (VLC) [3]- [5], which has attracted considerable interests owing to its compelling low cost, license-free operations, low electromagnetic interference, high security and so on.…”

Section: Introductionmentioning

confidence: 99%

Multiuser MISO Transceiver Design for Indoor Downlink Visible Light Communication Under Per-LED Optical Power Constraints

et al. 2015

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Light-emitting diode (LED) based visible light communication (VLC), combining illumination and communication, is a promising technique of providing high-speed low-cost indoor wireless services. In indoor environments, multiple LEDs routinely used as lighting sources may also be concomitantly invoked for supporting wireless services for multiple users, thus forming a multiuser multipleinput single-output (MU-MISO) system. Since the user terminals detect all the light rays impinging from multiple LEDs, inter-user interference may severely degrade the attainable system performance. Hence, we conceive a transceiver design for indoor VLC MU-MISO systems to suppress the multiuser interference (MUI). In contrast to classic RF communication, in VLC the signals transmitted from the LEDs are restricted by optical constraints, such as the real-valued non-negativity of the optical signal, the maximum permissible optical intensity and the constant brightness requirements of the LEDs. Given these practical constraints, we design the optimal transceiver relying on the objective function (OF) of minimizing the maximum of the mean square error (MSE) between the legitimate transmitted and received signals of the users and show that it can be readily found by solving a convex secondorder cone program (SOCP). Then, we also propose a simplified transceiver design by incorporating zero-forcing transmit precoding (TPC) and show that the TPC coefficients can be efficiently found by solving a linear program. The performance of both the optimal and of the simplified transceiver is characterized by comprehensive numerical results under diverse practical VLC system setups.Index Terms: Light-emitting diode, Visible light communication, transceiver design, multiuser multipleinput single-output, light-emitting diode, mean square error 1943-0655 (c) IEEE Photonics JournalMultiuser MISO Transceiver Design for higher-speed data transmission and the saturation of the radio frequency (RF) spectrum, VLC is deemed to be a promising technique of realizing ubiquitous indoor wireless downlink coverage [6]. VLC systems often exploit multiple lighting sources for simultaneously supporting multiple users in indoor environments [7], which leads to the concept of multiuser MISO (MU-MISO) VLC systems. Since each user terminal receives light rays from multiple LEDs, inter-user interference arises, which may severely degrade the multiuser performance. Thus, the multiuser VLC system's transceiver has to supress the multiuser interference (MUI). Although multiuser RF systems have been extensively studied, they cannot be directly applied to VLC systems owing to the following major aspects [8]:• The signals transmitted by LEDs must be non-negative real values instead of the bipolar complex values of RF communication. • In VLC, the main functionalities of LEDs are to provide indoor illumination, hence they are subject to optical power constraints for the sake of guaranteeing the indoor illumination, rather than to the electronic power constraints of RF communication...

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“…There have also been studies conducted on the suitability of OLED panelling as a lighting and communications device within the home. It was found that with the optimal layout and positioning of the OLED panels, and with the suitable driving electronics, high speed data broadcasts (>10 Mbps) at standard illumination levels (>500 Lux) can be achieved [39].…”

Section: Future Possibilitiesmentioning

confidence: 99%

LED based lighting and communications: An emerging technology for a greener more sustainable future

Burton¹,

Minh²,

Aslam³

et al. 2017

EAI Endorsed Transactions on Energy Web

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The paper discusses on the effect that the growth in our energy consumption as a species is having upon the planet, and how the global lighting and telecommunications industries are major contributors. We demonstrate that through the adoption of LED based lighting combined with visible light communications, substantial economical and power savings by orders of magnitude can be made over existing technologies, contributing towards a greener more sustainable future. The future of LED technology is also discussed with a focus on organic technology, promising increased savings.

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A Study of Illumination and Communication using Organic Light Emitting Diodes

Cited by 42 publications

References 18 publications

Perovskite Nanocrystals as a Color Converter for Visible Light Communication

Perovskite Nanocrystals as a Color Converter for Visible Light Communication

Multiuser MISO Transceiver Design for Indoor Downlink Visible Light Communication Under Per-LED Optical Power Constraints

LED based lighting and communications: An emerging technology for a greener more sustainable future

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