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영어

The life is the most representative parameter in the parameters of LED reliability. But the impact factor of the LED lifetime are numerous and complicated, each factor of the influence degree of each are not identical. If according to the traditional light source life test method, then the cycle is too long to not led update speed. And the majority of the LED accelerated life test by means of increasing the should force experiments to estimate the life of the LED light source, this kind of test is usually elevated led where the ambient temperature or increasing the current through the LED itself. Finally, through the acquisition of data and analysis to predict the service life of LED light source, but did not direct theoretical foundation to justify force and the service life of LED light source specific equivalent relation. Therefore, the accuracy of accelerated stress measured the service life of LED light source is yet to be verified. Through the analysis of the change of the life of LED is a gradient of chemical reaction, with the Arrhenius model, led the life of the weakening is through changes in the flux to the lumen, and for that we can under the normal working condition analysis of LED light attenuation mechanism and rules, the prediction from but realize life led to predict led by degradation of cause and the change of life.