LED Systems Applications and LED Driver Topologies: A Review

Esteki, Morteza; Khajehoddin, S. Ali; Safaee, Alireza; Li, Yunwei

doi:10.1109/access.2023.3267673

Cited by 31 publications

(2 citation statements)

References 238 publications

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“…higher key performance indicators required for sixth generation (6G) networks, especially integrated sensing and communication requirement [1]. Thanks for the prominent energy saving and long life advantages of light-emitting diode (LED), LED-based illumination has become the mainstream infrastructure [2], [3]. Thus, it is natural that visible light band-based wireless communication and sensing systems have emerged as promising enabling technologies in the era of 6G.…”

Section: Introductionmentioning

confidence: 99%

PoE-Enabled Visible Light Positioning Network With Low Bandwidth Requirement and High Precision Pulse Reconstruction

Wang,

Huang,

Chen

et al. 2024

J. Ind. Sea. Pos. Nav.

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The power over Ethernet (PoE)-enabled visible light positioning (VLP) networks as a promising technology can significantly enhance accuracy and costeffectiveness of indoor positioning. However, both the limited bandwidth of the light-emitting diode (LED) and the low sampling rate of the receiver have a negative impact on the positioning performance. Moreover, time synchronization requirements between transmitters and between transceivers become more stringent in a resourceconstrained VLP network. To address these issues, a PoEenabled VLP scheme with low bandwidth requirement and high-precision pulse reconstruction is proposed in the paper. Specifically, the precision time protocol and synchronous Ethernet are introduced to realize the synchronization transmission. Meanwhile, an on-off keying (OOK) modulation-based beacon signal is designed to unlock both the transceivers' synchronization and bandwidth requirements. Then, a high-precision pulse reconstruction method considering the LED model and impulse response is established to enhance the signal quality. Moreover, the position is estimated based on the maximum a posteriori (MAP) probability criterion. Experimental results obtained by the VLP testbed demonstrate that the proposed scheme outperforms the benchmark positioning schemes. It achieves a positioning accuracy of 1.7 cm by using the reconstructed 2 GHz sampling rate in the case of a bandwidth of 50 MHz and a real sampling rate of 100 MHz. Last but not least, the proposed scheme maintains positioning accuracy within 30 cm even with a few MHz bandwidth of LED.

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Section: Introductionmentioning

confidence: 99%

PoE-Enabled Visible Light Positioning Network With Low Bandwidth Requirement and High Precision Pulse Reconstruction

Wang,

Huang,

Chen

et al. 2024

J. Ind. Sea. Pos. Nav.

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show abstract

“…In addition, LED has many benefits, including compact size, high energy efficiency, good color rendering, fast response speed, and so on. These advantages mean that LEDs are widely used in many light applications [1][2][3]. Nowadays, the power level of a high-brightness LED is approximately hundreds of milliwatts to several watts.…”

Section: Introductionmentioning

confidence: 99%

A High Power Factor LED Driver with Intrinsic Current Balancing Capability

Cheng

Hung

2023

Applied Sciences

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The research proposed a novel LED driver with the functions of power-factor correction (PFC) and current balancing. A flyback converter and a Class-D series resonant converter were integrated by sharing an active switch to form a single-stage circuit topology. The flyback converter played the role of a PFC circuit. The component parameters were designed to make the flyback converter to operate at discontinuous-conduction mode (DCM). In this way, the input line current can be sinusoidal, resulting in near unity power factor and low total harmonic distortion in current (THDi). The resonant converter was connected in series with a differential-mode transformer with a turns ratio of 1 to drive four LED strings. The current of the four LED strings will be automatically and evenly balanced by using the 1:1 transformer. This article analyzed the different modes of operation in detail, derived the mathematical equations and designed the parameters of the circuit components. Finally, a 72-W prototype LED driver was implemented and tested. A satisfactory performance has verified the feasibility of the proposed LED driver.

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A wide voltage range non‐isolated continuous input buck‐boost converter for optimal green energy harvesting in LED lighting systems

Kanithi,

B L

2024

Circuit Theory & Apps

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This article introduces a wide input range buck‐boost Light Emitting Diode (LED) driver designed for industrial and street lighting applications. The driver characterized by a continuous input current with less ripple and common ground between input and output featuring non‐inverting voltage at the output, suitable for green energy sources. The proposed topology achieves a high voltage conversion ratio which is a blend of quasi‐Z source boosting followed by conventional buck with enhanced step‐down voltage capability. Furthermore, the driver maintains a constant voltage at the load terminal for diverse source voltage variations by adapting the inherent buck‐boost nature. Also, the driver operates with low duty ratio results in lower voltage, current stresses and conduction losses. The steady state and design analysis of the proposed LED driver is carried out for an input voltage range from 24 to 96 V. An experimental prototype of 200 W/71 V LED driver is validated in the laboratory for wide input voltage. There is a high concordance exists between the theoretical analysis and experimental results of the proposed topology.

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LED Systems Applications and LED Driver Topologies: A Review

Cited by 31 publications

References 238 publications

PoE-Enabled Visible Light Positioning Network With Low Bandwidth Requirement and High Precision Pulse Reconstruction

PoE-Enabled Visible Light Positioning Network With Low Bandwidth Requirement and High Precision Pulse Reconstruction

A High Power Factor LED Driver with Intrinsic Current Balancing Capability

A wide voltage range non‐isolated continuous input buck‐boost converter for optimal green energy harvesting in LED lighting systems

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