future of lighting : leds, oleds, and lighting systems (and some lasers)
Post on 15-Jan-2015
Embed Size (px)
DESCRIPTIONScientists and engineers continue to find new materials that better exploit the phenomenon of electroluminescence. These materials have higher luminosity per Watt, often lower costs per lumen, and thus increase the chances that light emitting diodes and organic light emitting diodes will begin to diffuse. Other advantages for them such as flexibility and size also increase the chances that they will diffuse. Furthermore, laser diodes also continue to experience improvements as scientists and engineers find new materials and reduce the size of the relevant features, thus increasing the number of applications for them.
- 1. A/Prof Jeffrey FunkDivision of Engineering and Technology ManagementNational University of Singapore
2. Source: Roland Haitz, Jeffrey Tsao, Solid-state Lighting: The case 10 years after and future prospects,Phys. Solidi A 208 (1): 17-29, 2011What do Continued Improvements in Luminosity perWatt for LEDs Mean for Lighting? 3. What about Organic LEDs (OLEDs)What do Continued Improvements in Luminosity perWatt for OLEDs Mean for Lighting?Source: Sheatset al, 1996, Organic Electroluminescent Devices, Science 271 (5277): 884-888 and ChangheeLeespresentation slides; PPV: poly (p-phenylenevinylene) 4. SessionTechnology1Objectives and overview of course2When do new technologies become economically feasible?3Two types of improvements: 1) Creating materials that better exploit physical phenomena;2) Geometrical scaling4Semiconductors, ICs, electronic systems, big data analytics5MEMS and Bio-electronics6Lighting, Lasers, and Displays7Information Technology and Land Transportation8Human-Computer Interfaces, Biometrics9Superconductivity and Solar Cells10Nanotechnology and DNA sequencingThis is Sixth Session of MT5009 5. OutlineExisting state of lightingLight emitting diodes (LEDs)Organic light emitting diodes (OLEDs)Laser DiodesApplications for Laser DiodesBioluminescence 6. Type of SpecsIncandescent LampFluorescent lampLEDOLEDThicknessVeryThickVeryThick6.9 mm (for LED TV)1.8mmFlexibilityVeryinflexible, and breakableVeryinflexible, and breakableSome flexibilityMost flexibleDanger to eyesCant stare at themCant stareat themCant stare at themOkaytostareLifespan500-700 hrs>10, 000 hrs100, 000 hrs15, 000 hrsPrice of 60 Watt bulb