Group of Electrophotonics

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1 Group of Electrophotonics MIND-IN2UB, Departament d Electrònica Universitat de Barcelona Prof. Blas Garrido, Dr. Sergi Hernández, Adrià Huguet Ferran, Dr Yonder Berencén, Julià López Vidrier, Joan Manel Ramírez, Oriol Blázquez and Martí Busquets Contact:

2 TERRITORY

3 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 Figure courtesy of International Dark-Sky Association George C.Brainard et al. Action Spectrum for Melatonin Regulation in Humans: Evidence for a Novel Circadian Photoreceptor. The Journal of Neuroscience, August 15, 2001

4 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

5 Main objectives Develop a system able to reach these quality, efficiency and smart parameters Quality - Dimming - Variation of the Correlated Color Temperature - Very high CRI - Very high Gamut Area Index - Hue according to ambience Efficiency - High efficiency due to phosphor-based LEDs - Accurate intensity control with heat sinks - Light control using external sensors (PIR & photoresistor) Smart Control - Main parameters control using automatic or manual mode - Daily Solar Cycle simulator - Pre-charged ambiences - Wired or wireless control of the system - Smartphone integration 5

6 Main objectives Reproduction of black body illumination along the Planckian locus T = 2400 K T = 4500 K T = 8000 K T = 3100 K Tunable emission - Continuous colour temperature variation - Control over the total intensity - RGB mode for decoration 6

7 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

8 Methodology Graphical User Interface: Color Temperature mode vs RGB mode Color Temperature mode CCT ~ 3500K CRI ~ 98 RGB mode 8

9 Expected results Main parameters of common light sources Source CRI CCT (K) Efficiency(lm/W) Solar light Smart light system > Incandescent light bulb > Phosphor-based LED (warm) ~ 90 Fluorescent lamp < 120 Phosphor-based LED (cool) ~ 105 RGB light system ~ 50 ~ 5100 ~ 75 Sodium-vapor lamp ~ ~ 200 Smart Light System CCT variation (2500K vs 5500K) 9

10 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

11 Contact Dr. Sergi Hernández Associated Professor Department of Electronics University of Barcelona C/ Martí i Franquès 1, Planta Barcelona, Spain Tel THANK YOU FOR YOUR ATTENTION 11

12 Facilities in the Department of Electronics Laboratory of Luminescence Photoluminescence (VIS-UV-IR, vacuum, criogenia) Electroluminescence (electronics, integrated sphere, LEDs) Laboratory of Optoelectronics Electrical measurements (I-V, C-V, SPA, test station) Optical measurements (collection, spectrometer) Laboratory of Photonics 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 m-disks Microscope Objective Pump laser CCD Objective/Collection lenses Monochroma tor f=750mm PL signal Polarizer (res<0.06nm ) PMT

13 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

14 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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