Improving optical performance of multi-chip white LEDs by bi-layers remote-packaging phosphors

Abstract

In the last some decades, White LEDs (WLEDs) with the optimal advances such as durability, chromatic performance, low-power consumption, long-lifetime, and environmentally friendliness are popularly used in industrial and general lighting all over the world. From this point of view, we present an innovative coating model for the multi-chip White LEDs (MCW-LEDs) in a direction to improving their optical performance. This model base on the WLEDs with bi-layers Red-Emitting and Yellow-Emitting Phosphor, which is set up remotely from the blue WLEDs chip. With using the Mat lab and the industrial Light Tools software, the optical performance of the WLEDs could be improved significantly by the bi-layer remote-packaging phosphors. Furthermore, the research results indicated that the proposed coating model of MCW-LEDs could be a prospective solution for manufacturing remote-packaging WLEDs in the near future.