Gr Group oup of of Electr Electrophotonics ophotonics MIND MIND-IN2UB IN2UB, , Dep Depar arta tamen ment d’Electrònica Univ Univer ersita sitat de de Bar Barce celona lona Prof. Blas Garrido, Dr. Sergi Hernández , Adrià Huguet Ferran, Dr Yonder Berencén, Julià López Vidrier, Joan Manel Ramírez, Oriol Blázquez and Martí Busquets Contact: shernandez@ub.edu
TERRITORY
Smart Lighting Systems for healthy illumination products Concept Visual effects Visual perception Cones and rods Biological effects Internal clock Sleep-wake cycle Melatonin regulation Intrinsic photosensitive retinal ganglion cells Discovered in 2002 by Samer Hattar and colleagues George C.Brainard et al. Action Spectrum for Melatonin Regulation in Humans: Evidence for a Novel Circadian Photoreceptor. The Journal of Figure courtesy of International Dark-Sky Association Neuroscience , August 15, 2001
Smart Lighting Systems for healthy illumination products Concept Proper illumination is fundamental for an optimum and healthy environment. Following circadian lighting cycles helps to regulate the body metabolism and sleeping periods. LED technologies combined with smart control can provide a smart lightning solution for a wide range of situations: working place, home, hospitals, light therapy rooms... Color Engineering → CRI, GAI and CCT control, Biolumen
Smart Lighting Systems for healthy illumination products Main objectives Develop a system able to reach these quality, efficiency and smart parameters Smart Control Quality Efficiency - Main parameters - Dimming - High efficiency due control using automatic to phosphor-based or manual mode - Variation of the LEDs Correlated Color - Daily Solar Cycle Temperature - Accurate intensity simulator control with heat - Very high CRI sinks - Pre-charged ambiences - Very high Gamut - Light control using Area Index external sensors - Wired or wireless (PIR & control of the system - Hue according to photoresistor) ambience - Smartphone integration 5
Smart Lighting Systems for healthy illumination products Main objectives Reproduction of black body illumination along the Planckian locus T = 2400 K Tunable emission T = 3100 K - Continuous colour temperature variation T = 4500 K - Control over the total intensity - RGB mode for decoration T = 8000 K 6
Smart Lighting Systems for healthy illumination products Methodology Smart control - Micro-controller acting up to 256 different current channels - Combination of 6 different types of commercial LEDs to fully control the spectral emission - Different control possibilities: PC, wifi, bluetooth (mobile) or over the internet - Multiplatform control: MSWindows, Unix, Android or simple control panel 7
Smart Lighting Systems for healthy illumination products Methodology Graphical User Interface: Color Temperature mode vs RGB mode Color Temperature mode RGB mode CCT ~ 3500K CRI ~ 98 8
Smart Lighting Systems for healthy illumination products Expected results Main parameters of common light sources Source CRI CCT (K) Efficiency(lm/W) Solar light 100 2000 – 8000 - Smart light system > 95 2000 – 8000 85 – 100 Incandescent light bulb > 95 2700 10 – 20 Phosphor-based LED (warm) 85 – 90 2700 ~ 90 Fluorescent lamp 60 – 85 5000 < 120 Phosphor-based LED (cool) 80 – 85 4000 ~ 105 RGB light system ~ 50 ~ 5100 ~ 75 Sodium-vapor lamp ~ 40 2700 ~ 200 Smart Light System CCT variation (2500K vs 5500K) 9
Smart Lighting Systems for healthy illumination products Expected results CRI variation using different CCT CRI reaches very high values due to the combination of the different LEDs used, getting a very valuable light with a high efficiency. 10
Smart Lighting Systems for healthy illumination products Contact Dr. Sergi Hernández Associated Professor Department of Electronics University of Barcelona C/ Martí i Franquès 1, Planta 2 08028 Barcelona, Spain Tel. +34934039154 shernandez@ub.edu www.el.ub.edu THANK YOU FOR YOUR ATTENTION 11
Facilities in the Department of Electronics Laboratory of Luminescence Photoluminescence (VIS-UV-IR, vacuum, criogenia) Electroluminescence (electronics, integrated sphere, LEDs) Laboratory of Optoelectronics Microscope Objective Electrical measurements (I-V, C-V, SPA, test CCD Pump laser station) m -disks Objective/Collection lenses Optical measurements (collection, spectrometer) Monochroma PMT tor f=750mm Laboratory of Photonics (res<0.06nm PL signal Polarizer ) Waveguides and micro-photonics Time-resolved photoluminescence (pulsed lasers) Z-scan and non-linear optics Photocurrent and solar cells Laboratory of Design and Simulation Optoelectronics (Synopsys TCAD) Photonics (Fimmwave, Phoenix) Electronic workshop Design, development and fabrication of
Facilities in or near the campus Centres Cientifics and Technologics (CCiT ) Mechanical and Electronic Workshops Spectroscopies: FTIR, Raman, UV-VIS Surface Analysis: XPS, Auger, SIMS Micro/Nanoscopies: HREM, EFTEM, SEM, AFM, SNOM Scientific Park, Nanotecnology Platform FIB, nanoimprint, nanoinking, hot embossing, dry etching Physics Faculty Clean Room Evaporator, Sputtering PECVD Lithography, Wet etching Associated Unit to IMB-CNM-CSIC CMOS line 0.35 µm, e-beam lithography
PROJECTS AND COLABORATIONS HELIOS : “Electronics and Photonics Integration on CMOS” NASCENT: “Silicon nanodots for solar cell tandem” LEOMIS : Integrated emitter for interconnects CILI : Circadian Lighting systems for healthy illumination products
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