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Settling of the heavy phosphor particles in the silicone encapsulation is a root-cause for variation of the correlated color temperature causing yield reduction in the fabrication of white light-emitting diodes (LEDs). When prefabricated particles consisting of the phosphor and the silicone are used, settling can be significantly reduced and a dramatic enhancement of the consistency of LED performance...
In LED packaging, phosphor particles are usually mixed with silicone resin and then dispensed onto the top surface of LED chips. The phenomenon of phosphor sedimentation during dispensing and curing process is a serious problem in the LED packaging industry. In this paper, a facilely realizable and economical method was proposed to restrain phosphor sedimentation in high-power white LED packaging...
In LED packaging, phosphor particles are usually mixed with silicone resin and then dispensed onto the top surface of LED chips. The phenomenon of phosphor sedimentation during dispensing and curing process is a serious problem in the LED packaging industry. In this paper, a facilely realizable and economical method was proposed to restrain phosphor sedimentation in high-power white LED packaging...
High power white light emitting diodes (LEDs) have begun to play an important role in many illumination applications due to their excellent performance. In this paper, an effective freeform lens design method for extended light source was suggested briefly for the first time and two compact LED packaging freeform lenses, with the material of polycarbonate (PC) and silicone respectively, were designed...
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