Abstract
As a future lighting source, high power LED lighting is significant in that it provides decades of lifetime under normal operation, requiring a fraction of the power demanded for traditional lighting solutions. For LED lighting to be a viable lighting source, there are many technical challenges to be resolved. Among them the light extraction efficiency, the chip overheating, and the light output degradation are the key issues, which turn out to be all related to the packaging materials. This talk outlines those challenges and reports some of the recent progresses in resolving the key problems
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