PHOSPHOR DEPOSITION METHOD AND APPARATUS

摘要

A phosphor deposition process and apparatus that enables an efficient, consistent, and flexible white ligght LED light engine by spraying a conformal coating of phosphor matrix onto an array of LEDs to achieve high color uniformity, consistency, and efficiency. A predetermined ratio of one or more phosphor powders are mixed with a support matrix (preferably silicone), the types and amounts of which are calculated to provide a predeterminated spectral output. A low-viscosity carrier is introduded into the phosphor matrix to allow for further processing and deposition. The posphor matrix and carrier mixture is atomized and sprayed in one or more uniform layers onto to one or more LED devices. Computerized control, movable stages, and in-process spectral monitoring are incorporated to provide rapid and accurate processing of LED devices.