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This paper will propose an accelerated lifetime test method for DC or AC supplied electronic control gear for LED modules of outdoor LED lighting products. This accelerated lifetime test method focuses on major failure modes of DC or AC supplied electronic control gear for LED modules of outdoor lighting products, selects suitable conditions, and thus is able to reduce total test duration.
With application of accelerated luminous depreciation test method of CSA020 which can reduce the lifetime test from 6,000 hours to less than 2,000 hours, LED lighting products with highly lumen depreciation or short lifetime can be easily screened out. Many potential factors can lead to that highly depreciation issue. This paper attempted to perform highly depreciation cause analysis by investigation...
The purpose of this work is to conduct the multi-physics simulation analysis of LED-based luminaires under certain temperature and humidity environment, and to find out the vulnerable spot of the luminaire. The coupled modeling of LED luminaire during step stress accelerated test (SSAT) is simulated by ANSYS. Five types of modeling, i.e. thermal and thermo-mechanical modeling, moisture diffusion and...
Plastic encapsulations will absorb moisture in humid environments due to their hydrophilic nature, this in combination with the inherent ionic contamination of the plastic will result in an electrolyte. This electrolyte might pose several reliability issues for the package and the encapsulated microelectronic circuit, such as electrochemical migration and bond pad corrosion. The corresponding failure...
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