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Block Diagram

Block Diagram. Computer Simulation. Color Mixing. Computer Design. Computer Design. Computer design. Outlook in Europe. The Workshop on LED Manufacturing for Lighting & Displays was held in Berlin, Germany on September 10-11, 2007.

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Block Diagram

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  1. Block Diagram

  2. Computer Simulation

  3. Color Mixing

  4. Computer Design

  5. Computer Design

  6. Computer design

  7. Outlook in Europe The Workshop on LED Manufacturing for Lighting & Displays was held in Berlin, Germany on September 10-11, 2007. Significant advances in performance will be needed to realize these expectations, as follows: • Output of a single white LED to exceed 200 lumens • Radiant conversion efficiency to exceed 150 lm/W • Luminance greater than 50 Mcd/m2 • Lifetime greater than 50,000 hours • Integration into large-area panels • Integration with driving electronics • Resistance to harsh weather conditions

  8. Advantages and challenges Luminaire manufacturers also expressed great interest in LEDs. Among the design advantages offered by LEDs the following were mentioned: • Very compact dimensions of lighting fixtures • Can fit in conventional light fittings; • Dimming is possible without change in colour temperature; • Colour of light is adjustable with use of multi-coloured LEDs, enabling dynamic colour control and high colour saturation • Large range of colour temperatures • Long operating life • Reduced or zero maintenance costs • High luminous efficiency • Absence of IR and UV light • Safety, because of very low voltage • Very reduced amount of heat (no risk of burns) • Cold switch-on (down to -40°C) and higher efficacy at cold temperatures • Precise directional emission without accessories or refractors • Use of efficient optics made of polymers

  9. LED Eye Safety

  10. Cost At present, incandescent and fluorescent lamps have a cost-per-lumen ratio of $0.03–0.05 and $0.06, respectively. To compete, the figure for LEDs needs to drop by a factor of 20. But increasing drive current to 2 A and efficacy to 150 lm/W will deliver a nine-fold improvement, which means that we can get into the right ballpark if we can halve the cost of making LEDs.

  11. Outlook in USA • DOE's long-term research and development goal calls for white-light LEDs producing 160 lm/W in cost-effective, market-ready systems by 2025.

  12. R & D of LED

  13. Thank you for your coming You and Shanghai University will have a great and bright future

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