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A novel method based on the analytical multi-physics simulation to predict the lifetime for LED systems is presented in this paper. LED is a typical multidisciplinary system that transfers electrical input into photonic output, and lifetime prediction is a must for new electronic device before releasing to market. The lifetime feature of LED systems is closely connected to the power, thermal, and...
GaAs space solar cells always suffered from the complex and hostile space environment. Space solar cell reliability is crucial factor to ensure the normal operation of space satellites. A method of modeling the degradation of GaAs space solar cells is proposed here. The method is to find one crucial performance parameter to depict the degradation process. By applying compound Poisson process and general...
The heat dissipation is a crucial factor for the reliability of high power white LEDs(HPLEDs). In this paper, a novel thermal pad structure is presented for HPLEDs, a theoretic thermal transfer model is built to analyze the thermal transferring in LED component. Besides, the thermal simulations of the LED component with the typical or the novel thermal pad are conducted, the temperature distributions...
Lumen decay of LEDs is affected by time, junction temperature and input current. In LED lamps, both temperature and input current vary with time due to driver's degradation and temperature change of lamps. This paper proposes a lumen decay prediction method which considers effects of operation time, temperature and current by taking the interaction of LED and driver performance into account. In particular,...
The quality (or reliability) cannot be qualified for high reliable microelectronic devices (failure rate less than 10−6/h) through qualification and quality conformance procedures in military standard. A method of quantitative qualification is proposed based on the distribution of degraded tests parameters for Destructive Physical Analysis (DPA). Firstly, based on the 5005.2 method (qualification...
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