Yang Liang, Wang Simin, Lv Zhicheng, Liu Sheng
Division of MOEMS, Wuhan National Laboratory for Optoelectronics, Wuhan, China.
Appl Opt. 2013 Apr 1;52(10):2075-9. doi: 10.1364/AO.52.002075.
An advanced phosphor conformal coating technology is proposed, good correlated color temperature (CCT) and chromaticity uniformity samples are fabricated through phosphor spray painting technology. Spray painting technology is also suitable for phosphor conformal coating of whole LED wafers. The samples of different CCTs are obtained through controlling the phosphor film thickness in the range of 6-80 μm; CCT variation of samples can be controlled in the range of ±200 K. The experimental Δuv reveals that the spray painting method can obtain a much smaller CCT variation (Δuv of 1.36e(-3)) than the conventional dispensing method (Δuv of 11.86e(-3)) when the light is emitted at angles from -90° to +90°, and chromaticity area uniformity is also improved significantly.
提出了一种先进的磷光体共形涂层技术，通过磷光体喷涂技术制备出具有良好相关色温（CCT）和色度均匀性的样品。喷涂技术也适用于整个LED晶圆的磷光体共形涂层。通过将磷光体膜厚度控制在6-80μm范围内获得不同CCT的样品；样品的CCT变化可控制在±200K范围内。实验Δuv表明，当光从-90°到+90°角度发射时，喷涂方法比传统的点胶方法（Δuv为11.86e(-3)）能获得小得多的CCT变化（Δuv为1.36e(-3)），并且色度区域均匀性也得到显著改善。
