New PI-LED technology for atmospheric and authentic Illumination of old buildings

Transcription

1 New PI-LED technology for atmospheric and authentic Illumination of old buildings Univ.Prof.Dr. Günther Leising Graz University of Technology, Austria LUMITECH Produktion und Entwicklungs GmbH, Jennersdorf, Austria 1

2 Light Emitting Diodes 2

3 LED Technology 1000 µm 300 µm 3

4 White Light LED Sources Hetzel R et al., e & i, 129/7-8: ,

5 Phosphor Conversion Hetzel R et al., e & i, 129/7-8: ,

6 White Light LED Hetzel R et al., e & i, 129/7-8: ,

7 Photopic: Vision 3 Types Provide color vision Peak positions (Individually): L M S = nm = nm = nm Scotopic: Highly sensitive Vision at low light level Colorimetry, Brainard, D.H., & Stockman, A. The Optical Society of America Handbook of Optics, 3rd edition, Volume III: Vision and Vision Optics. New York: McGraw Hill,

8 Spectral Sensitivity Light Emitting Diodes by E. F. Schubert, Second Edition,

9 Vision 9

10 Daily Hormone Level Circadian Rhythm The hormones Melatoninand Cortisolare main responsible for controlling the circadian rhythm! DLMO: Dim Light Melatonin Onset How to assess circadian rhythm in humans: A review of literature, Epilepsy & Behavior, Hofstra et al.,

11 The Circadian Rhythm Sleep wake cycle Responsible for the human biological clock Slightly longer than our 24 hours day Synchronizes every day by external Zeitgebers Controlled by a non image forming system Reflects physical properties Defines different chronotypes 11

12 Demands on Modern Light Sources High Power Efficiency Long Lifetime High Color Rendering Supporting of the Human Circadian Rhythm (Variable Light) 12

13 Color Temperature 13

14 Color Temperature W/(m 2 nm) W/(m 2 nm) W/(m 2 nm) 14

15 Sky ( ) CCT = 6000 K CRI = 98 15

16 Sky ( ) CCT = 3600 K CRI = 93 16

17 Sky ( ) CCT = 8600 K CRI = 89 17

18 New high-end high-cri LED module 18

19 color rendering (CRI, Ra) 19

20 Color Rendering Sunlight Spectrum Cloudy Sky, 10:00 am Spectrum of a Fluorescent Lamp T5 -Standard Office Lighting Lumitech E8 at 2700 K Lumitech E8 at 6500 K 20

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23 Münsterkirche Radolfzell 23

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25 Evangelische Kirche Hallbergmoos 25

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27 Olafur Eliasson 27

28 Olafur Eliasson 28

29 Olafur Eliasson 29

30 Osservatorio Astronomico di Capodimonte, Napoli Opening 9 ottobre 2014, ore 20,30 Dal 10 ottobre al 10 novembre 2014 Supernova 1604 reloaded Paul Renner Günther Leising A cura di Giuseppe Morra 30

31 Efficency Mood Comfort 31

32 Thank you for your attention! Graz University of Technology Petersgasse 16 A 8010 Graz Tel: g.leising@tugraz.at Web: LUMITECH Technologiepark 10 A 8380 Jennersdorf leising@lumitech.com Web: 32

33 Fluorescent Lamp / Energy Saving Lamp Poor Light Quality (Spectral Distribution & CRI) No Color Temperature -> Correlated Color Temperature Poor Dimming Capability Contains Mercury (Hg) Toxic! Poor Lifetime Incandescent Light Bulb Low Efficiency Short Lifetime Dimming at constant Color Temperature not possible 33

34 Color Temperature W/(m 2 nm) W/(m 2 nm) W/(m 2 nm) 34

35 Color Temperature? 35

36 Tunable White Light (2700 K 6500 K) High White Light Quality Color Conversion Maximum Energy Efficiency COB LED-Module 36