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In this work, the accelerated aging experimental tests of LED samples packaged with different kinds of LED chips were carried out under 85°C/85% relative humidity (RH) moisture condition. It was found that the optical output of these LED modules declines at different speeds during the aging experiments. Water was observed at the interface between PC lens and silicone glue in the modules. Based on...
The state of phosphor will greatly influence the packaging performance such as luminous efficiency, quality of white light and color uniformity. The analysis presents that the small variations of thickness and concentration could significantly influence the light extraction efficiency and the correlated color temperature (CCT). With the increase of thickness and concentration, the light extraction...
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