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The tunable LED-based illumination system using dielectric liquid lens with changing light distribution from side emitting to focusing. LED and liquid lens set in one package filling with oil reducing the junction temperature.
A new morphology of nanopatterned sapphire substrates (NPSS) was presented, which applied in LEDs exhibited an output power of 33.1 mW, higher than that on flat substrates 2.4-fold, owing to void-embedded NPSS with cortexlike nanostructures.
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