Gr Group oup of of Electr Electrophotonics ophotonics MIND - - PowerPoint PPT Presentation

Gr Group

• up of
• f Electr

Electrophotonics

• photonics

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

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

Smart Lighting Systems for healthy illumination products Concept

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

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

5

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

• r manual mode
• Daily Solar Cycle

simulator

• Pre-charged

ambiences

• Wired or wireless

control of the system

• Smartphone

integration Develop a system able to reach these quality, efficiency and smart parameters

T = 8000 K T = 4500 K T = 2400 K T = 3100 K

Smart Lighting Systems for healthy illumination products Main objectives

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Tunable emission

• Continuous colour

temperature variation

• Control over the total

intensity

• RGB mode for decoration

Reproduction of black body illumination along the Planckian locus

Smart Lighting Systems for healthy illumination products Methodology

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• Micro-controller acting up to 256

different current channels

• Combination of 6 different types of

commercial LEDs to fully control the spectral emission

Smart control

• Different control possibilities: PC, wifi,

bluetooth (mobile) or over the internet

• Multiplatform control: MSWindows,

Unix, Android or simple control panel

Smart Lighting Systems for healthy illumination products Methodology

8

Color Temperature mode CCT ~ 3500K CRI ~ 98 RGB mode

Graphical User Interface: Color Temperature mode vs RGB mode

Smart Lighting Systems for healthy illumination products Expected results

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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

Main parameters of common light sources Smart Light System CCT variation (2500K vs 5500K)

Smart Lighting Systems for healthy illumination products Expected results

10

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.

Smart Lighting Systems for healthy illumination products Contact

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• 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

Facilities in the Department

• f 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



Design, development and fabrication of

PMT

Objective/Collection lenses

m-disks

Monochroma tor f=750mm (res<0.06nm )

Microscope Objective

Pump laser

CCD

PL signal Polarizer

 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

Facilities in or near the campus

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