LED Lighting Systems with Luminous Flux and Color Control

Dear Colleagues,

In recent years, LEDs have become the preferred light source for virtually all artificial lighting systems. Their long lifespan, high efficiency and ease of control have been the main reasons for their rapid adoption in the market. However, some of the advantages of LED lamps are still barely used in currently marketed systems, although they are attracting growing interest in the international research community. Among these advantages, it is worth highlighting the possibility of including LEDs with different color spectra within the same lamp. This allows for designing lighting systems with the ability to automatically adjust the color of light depending on user preferences and operating conditions. This has obvious benefits in decorative lighting and marketing, but it can also be used to optimize the non-visual stimulus from artificial lighting systems to adapt them to human circadian cycles, which has a major impact on user well-being and productivity.

The design of this type of system covers multiple disciplines, including, among others, power electronics, instrumentation, colorimetry and control system design.

Potential topics of this Special Issue include, but are not limited to, the following:

• Optimized power topologies for supplying LED lamps with color control (multi-output converters, post-regulators for current control in LED lamps, integrated stages with multiple output, etc.);
• Instrumentation for measuring the level and quality of light in lighting systems (distributed lighting measurement systems, optimized design of light color sensing systems, etc.);
• Optimization of the color spectrum and light quality of LED lamps (optimization of the light emission spectrum of multi-chip LED lamps, circadian lighting, flicker minimization, color deviation correction techniques, etc.);
• Closed-loop control of adjustable color LED lighting systems (advanced digital control applied to lighting systems, algorithms for the control of lighting systems with multiple sensors and lamps, etc.);
• Optimization of energy use in LED lighting systems.

Dr. Javier Ribas
Dr. Pablo José Quintana-Barcia
Guest Editors

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