| Summary: | 碩士 === 國立中央大學 === 光電科學與工程學系 === 102 === This study is to establish the aluminum nitride substrate, the alumina substrate and the aluminum substrate LED module to estimate its lumen maintenance of life model. Refer to IES LM-80-08 lumen maintenance light measurement methods. The aluminum nitride substrates, alumina substrates, aluminum substrates, each type for 10 pcs, placed under 55 and 85 degrees environment. Using the IES LM-79-08 light emitting diodes electrical and photometric characteristics measuring method, every 1000 hours recording lumen maintenance until 6000 hours. The resulting data use IES TM-21-11 estimate diode light source LED lumen maintenance performed life prediction module. LED modules to build three different models to estimate the life of the substrate, and the results can be applied in future in situ temperature measurement test (ISTMT) combined interpolation method to estimate the overall life of the lighting system.
The result of curve fitting L70(6K)：At 55 °C, AlN substrate is 36,642 hours, Al2O3 substrate is 27116 h, Al substrate is 26932 h, At 85 °C, Al2O3 substrate is 5422 h, AlN substrate is 5379 h, Al substrate is 5035 h.
Data interpolating the temperature 70 ° C results, AlN substrate is 13724 h, Al2O3 substrate is 11886 h, Al substrate is 11401 h.
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