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首页> 外文期刊>Smart Materials & Structures >Lightening performance investigation of conformal coating in light emitting diode packaging fabricated using a piezoelectric ultrasonic vibrator
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Lightening performance investigation of conformal coating in light emitting diode packaging fabricated using a piezoelectric ultrasonic vibrator

机译：使用压电超声振动器制造的发光二极管封装中的保形涂层的减光性能研究

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摘要

This study presents a new ultrasonic vibrator which can be applicable to high viscosity conformal coating in the light emitting diode (LED) packaging process. In order to achieve this goal, an ultrasonic vibrator is devised utilizing piezoelectric actuators so as to have a longitudinal motion. After analyzing the standing wave of the proposed ultrasonic vibrator, the design parameters of the concentrator horn are optimally determined to maximize the tip displacement amplitude of the ultrasonic vibrator. The size and flow of droplets sprayed from the proposed ultrasonic vibrator are evaluated by a fluid dynamics analysis. In order to evaluate the effectiveness of the proposed ultrasonic vibrator, the designed vibrator is manufactured and applied to conformal coating of an LED. The manufactured LED is then evaluated by the lighting uniformity and the correlated color temperature (CCT).
机译：这项研究提出了一种新型的超声振动器，可以应用于发光二极管（LED）封装过程中的高粘度保形涂层。为了实现该目的，设计了一种利用压电致动器的超声振动器，以使其具有纵向运动。在分析了所提出的超声振动器的驻波之后，最优地确定了集中器喇叭的设计参数，以最大化超声振动器的尖端位移幅度。通过流体动力学分析评估了从提出的超声振动器喷射的液滴的大小和流量。为了评估所提出的超声振动器的有效性，制造了设计的振动器并将其应用于LED的保形涂层。然后通过照明均匀性和相关色温（CCT）评估制造的LED。

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