Lifetime Prediction method of LED Light-emitting Device Based on Approximate Analysis

Cai Wenting,Huang Haisong,Li Sheng,Meng Qinghui,T Zhu,A Sharifi,M Anpo

doi:10.1051/e3sconf/202127101031

Cai Wenting, Huang Haisong + Show 5 more

Open Access

https://doi.org/10.1051/e3sconf/202127101031

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Abstract

Compared with other light sources, LED light source has a longer service life and will not suddenly fail. Due to its high efficiency, energy saving and long life, LED has become the most popular light source at present. However, it is no longer considered to meet the application requirements, and the time that the light flux decays to this level is considered to be the life of the LED. This paper introduces the approximate method used to predict the lumen maintenance life of LED lamps. The experimental results obtained by the approximate method are compared with the TM-21 standard. Eventually, it is concluded that the approximate method provides more reliability information than the original TM-21 standard, and the obtained results are more reference, more accurate and more reliable.

Highlights

In recent years, solid-state lighting has been widely used in various fields of industry and life
The lumen maintenance life (Lp) is the most suitable characteristic to measure the performance, life and reliability of light-emitting diodes (LEDs) lighting,[2] and most LED manufacturers currently establish life prediction analysis based on L70
L70 is calculated based on the light output degradation time, which represents the time when the LED lumen output drops from the initial value to 70%

Summary

Introduction

Solid-state lighting has been widely used in various fields of industry and life. The low-level advantages have opened up a new revolution in the field of lighting.[1] With the gradual expansion of the LED lamp application market, LED has become one of the most important lighting solutions in the current era, and the market demand for LED lighting is energy-efficient and durable. The lumen maintenance life (Lp) is the most suitable characteristic to measure the performance, life and reliability of LED lighting,[2] and most LED manufacturers currently establish life prediction analysis based on L70. Based on the lumens data of 6000 hours or more, this article uses an approximate method to predict the life of the LED. Use the approximation method to process the data obtained by the fitting, carry out the analysis and evaluation of the reliability of the LED. Compare and discuss with approximate the evaluation results of the method are compared and discussed the evaluation results of the approximation method with the TM-21 standard prediction method.[4]

NLS regression method

Approximation

Basic theory of IES TM-21 standard

Findings

Conclusion