Journal of Hebei University(Natural Science Edition) ›› 2023, Vol. 43 ›› Issue (6): 589-594.DOI: 10.3969/j.issn.1000-1565.2023.06.004LED

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Evaluation methods of luminous-flux-attenuation activation energy for LED bulb lamp

WU Deqi1,2,WU Yiping2,CHU Xiaoxing2   

  1. 1.Institute of Microelectrics, Chinese Academy of Sciences, Beijing 100029, China; 2.Industrial Technology Research Institute, Henan Mechanical and Electrical Vocational College, Zhengzhou 451191, China
  • Received:2022-12-09 Online:2023-11-25 Published:2023-12-15

Abstract: Under the rated power, temperature stress accelerated life test of BPZ 220/5 W JA55 bulb lamp was performed under thermal stress of 40 ℃ and 60 ℃ respectively, and the failure mechanism of the LED bulb samples was analyzed. A method to evaluate luminous-flux-attenuation activation energy value for LED bulb lamps was proposed, and a theoretical model to calculate luminous-flux-attenuation activation energy value was established in this paper. Thereby, the luminous-flux attenuation activation energy value of 0.67 eV was determined based on the above mentioned theory.

Key words: activation energy, LED bulb lamp, accelerated life test, luminous-flux attenuation, evaluation methods

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