Panel 3 Where is the SSL Revolution Headed?...– Spectral, Temporal, Spatial/Angular,...
Transcript of Panel 3 Where is the SSL Revolution Headed?...– Spectral, Temporal, Spatial/Angular,...
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2012 DOE SOLID-STATE LIGHTING R&D WORKSHOP
Panel 3—Where Is the SSL Revolution Headed? Steve Paolini - CTO, Lunera Lighting
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LONG TERM SUCCESS IN SSL
• Depends on more than saving energy • Depends on more than lower price
– Reliability, Lifetime, Color Quality, Consistency
• Depends on more than on/off – Sensors, Modulation, Content
• Depends on more than replacement – Spectral, Temporal, Spatial/Angular, Forms/Functions
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THERE IS MORE TO LIGHT THAN WHITE
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Green
Red
Blue
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5,225K
Photopic
wavelength, nm
arbi
trar
y u
nits
SPECTRAL POWER DISTRIBUTION – SPD
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TUNABLE SPECTRUM LIGHT – the way nature does it
• RGB is not enough – Too many gaps, inefficient green
• Five colors are a good balance (efficacy, cost) – Example recipe:
• R624p, G519p, B472p, CW6300K, PC(.405, .488)
• Light value increases as LED count goes up
– Falling prices make this a practical trend – Analogous to transistor count increases
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3,000K, 144 lm/w (LED), 93 CRI - LEDs are under-driven
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6300K
Over-converted yellow/green
624p
519p
472p
Pump LED
(.405, .488)
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5,000K, 134 lm/w (LED), 90 CRI - LEDs are under-driven
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LUMINOUS EFFICIENCY COLOR QUALITY
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LUMINOUS EFFICIENCY RADIENT EFFICIENCY
10% loss, power supply 10% loss, optics 5% loss, heat 5% loss, manufacturing tolerance
Well designed luminaire with modest beam shape and mixing requirements: { 10
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If you think under-driving LEDs and 5-color luminaires are not viable?
It’s already happening.
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UNDER-DRIVEN LEDs
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LUNERA - 2' X 2‘, 22G3-3500K
CREE - 2' X 4‘, CR24-40L-44W-40K
PHILIPS – A19, 800lm, 2700K
SCALED SIZE
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Vivid Theater Healing
Study Relax Sleep 14
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349, -157 and -095 series LEDs 121 WW, 96 CW, 44 R, 44 G, 44 B
Nov’11 retail, 79,800 yen ($1,000)
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Daylight Harvest
Night Light
Up Light
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Dual Processors
RGB WW/CW
Primary AC/DC 145VDC out
6 current drivers
Factory Programming
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Spectral
Temporal
Spatial/Angular
Forms/Functions
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STATE OF THE ART SPECTRAL CONTROL - 2011
– courtesy Telelumen 19
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Recorded on Mt. Hamilton, CA at Lick Observatory, 9mar11 – courtesy Telelumen
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Daylight Chromaticity Over 4-Hour Period
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“GLOWING WALLS” IALD AWARD WINNER 2009
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Fraunhofer Institute, LEiDs GmbH ceiling tiles – RGB and white LEDs simulate sky with moving clouds
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http://www.fraunhofer.de/en/press/research-news/2012/january/sky-light-sky-bright.html
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LARGE SCALE LUMINOUS FORMS
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TAKE AWAY POINTS
• Success depends on more than saving energy • Success depends on more than lower price
– Reliability, Lifetime, Color Quality, Consistency
• Success depends on more than on/off – Sensors, Modulation, Content
• Success depends on more than replacement – Spectral, Temporal, Spatial/Angular, Forms/Functions
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