The Right Light where and when you need it

Transcription

1 Smart Lighting The Right Light where and when you need it Partha S. Dutta Smart Lighting Engineering Research Center Electrical, Computer and Systems Engineering Rensselaer Polytechnic Institute, Troy, New York, USA July 7 th, 2010

2 Light Sources

3 Human Eye

4 Efficiency of Light Sources Category Lumen/watt Incandescent 10 to 35 Mercury Vapour (HID)) 20 to 60 Light Emitting Diode 100 (today) (Future) Fluorescent 40 to 100 Metal Halide (HID) 50 to 110 High Pressure Sodium (HID) 50 to 140 Low Pressure Sodium 100 to 180

5 Emergence of Digital Lighting Technologies Solid State Light sources: inherent spectral, polarization, spatial emission, temporal, color temperature controls, compact foot print, integration with microelectronics Conventional Lighting: poor efficiency, no controllability High Efficiency No controllability Efficiency & Controllability Smart Lighting High Optical Flux

6 Solid State Lighting & Displays

7 Smart Lighting Systems Speed Color l Polarization E,// Efficiency photons Pattern Color temperature emitter Digital Light Sources Smart Systems Lighting Display Health Communications Imaging

8 Need for Large Scale Artificial Lighting

9 Large Scale Deployment of Smart Light Sources Wavelength Controlled Plantation

10 Smart Lighting Transformation

11 Light and Human Health Light isn t just for vision anymore! Measurement Theory Application Seasonal affective disorder Jet lag Adolescents sleep patterns Space travel Sports performance Breast cancer Neonatal intensive care units Older adults sleep patterns Night shift workers Mark Rea and Mariana Figueiro, Lighting Research Center, RPI Sleep disorders

12 New paradigm for light Intensity Spectrum Distribution Timing Duration Appearance Visual System Visual Performance Performance, Well-being, Satisfaction, and Comfort Culture, Experience, Expectations IESNA Alerting Effects Circadian System Phase Shift Intensity Spectrum Distribution Timing Duration

13 Light System for Personal Health Direct effect of light on circadian rhythm through non visual receptors Disruption of circadian linked to major health problems Personal Light System: Circadian rhythm estimator based on entrainment model and daysimeter data Optimized lighting control with daysimeter feedback for entrainment Light sensors Activity monitor Mark Rea and Mariana Figueiro, Lighting Research Center, RPI

14 Energy Efficient Displays Polarized LEDs will provide huge energy savings! Courtesy: E.F. Schubert

15 Distributed Adaptive Lighting and Display Multisource Ad Hoc Network Multisensor Distributed Lighting and surface models Distributed Illumination Field Filtering, Prediction, State Observer Distributed Source Controller Lighting Drivers Sensing, Adaptive Sampling Art Sanderson, John Wen, RPI Multiresolution interpolation and planning

16 Visible Light Communications (Dual Use) High Bandwidth Density Integrated Mobility Critical Infrastructure Applications Prototype Module Tom Little, BU

17 Digital Light Sources: Vision LEDs with Theoretical Performance Limits Fabrication & Processing Technologies for Nano scale and Large Area LEDs Smart Adaptable LEDs : Multi functional, Integrated Electronic Photonic Device & Circuit Architectures + Dual-Functionality

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