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It is very crucial to guarantee a lower junction temperature effectively for the application of Light Emitting Diode (LED) products, and also extremely useful to obtain the junction temperature accurately. In this paper, a predicted method for junction temperature of LED lamp is proposed. Numerical stimulation combined with experimental validation is carried out to evaluate the junction temperature...
It is very crucial to guarantee a lower junction temperature effectively for the application of Light Emitting Diode (LED) products, and also extremely useful to obtain the junction temperature accurately. In this paper, a predicted method for junction temperature of LED lamp is proposed. Numerical stimulation combined with experimental validation is carried out to evaluate the junction temperature...
The MEMS Si thermal convective inclinometer without solid proof mass has many advantages such as more robust and immune to vibration shocks compared with traditional inclinometer. In this paper, a 3D parametric model of this kind of inclinometer has been setup. The influences of different airflow velocity under high environmental temperature have also been considered to study how they affect the sensitivity...
Currently, reliability of LED luminaires, especially LED system, has become one of the hottest researches of LED industry. However, in existing literature, almost none of them utilized step-stress accelerated degradation test (SSADT) to assess reliability of LED luminaires. While indoor lighting is close correlated to people's life, this paper takes LED bulb which produced by two different Chinese...
To ensure high reliability for advanced automotive electronics, investigation and understanding on the failure mechanisms under harsh conditions are needed. New methods and technologies for improved reliability and increased lifetime should be developed. In this paper, an investigation on the effect of high temperature aging on the thermomechanical properties, microstructure of the molding compounds...
Nowadays LEDs (Light Emitting Diodes) are widely used in many fields. As the fourth generation of lighting sources, LEDs have the advantages of long lifetime, power saving and environment-friendly. In this paper, the thermal variation characteristic of some parameters for two high-power LEDs packaging modules, such as forward voltage, luminous flux, CCT and luminous efficiency, were analyzed experimentally...
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