In this work, we propose micro-prism patterned remote phosphor (RP) films to enhance both luminous efficiency and color uniformity (CU) of remote phosphor-converted light-emitting diodes (rpc-LEDs) simultaneously. On the incident surface of the RP film, one micro-prism film is used to extract backward light by double reflection. On the exit surface, the other micro-prism film is adopted to retain blue light inside the RP film, thus enhancing the phosphor excitation. Experimental results show that double prism-patterned RP (DP-RP) film configuration shows a luminous flux of 55.16 lm, which is 45.1% higher than that of RP film configuration at 300 mA. As regards the CU, the DP-RP film configuration reduces the angular CIE-x and CIE-y standard variations by 68% and 69.32%, respectively, compared with the pristine device. Moreover, the DP-RP film configuration shows excellent color stability under varying driving currents. Since micro-prism films can be easily fabricated by a roll-to-roll process, the micro-prism patterned RP film can be an alternative to a conventional RP layer to enable the practical application of rpc-LEDs.

中文翻译：

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用于增强磷光转换发光二极管的发光效率和颜色均匀性的微棱镜图案化远程磷光膜

在这项工作中，我们提出了微棱镜图案化远程磷光体 (RP) 薄膜，以同时提高远程磷光体转换发光二极管 (rpc-LED) 的发光效率和颜色均匀性 (CU)。在RP膜的入射面上，使用一层微棱镜膜通过双反射提取后向光。在出射面上，采用另一片微棱镜膜将蓝光保留在RP膜内部，从而增强荧光粉激发。实验结果表明，双棱镜图案 RP (DP-RP) 薄膜配置显示出 55.16 lm 的光通量，比 RP 薄膜配置在 300 mA 时的光通量高 45.1%。至于 CU，与原始设备相比，DP-RP 薄膜配置将 CIE-x 和 CIE-y 标准的角度变化分别降低了 68% 和 69.32%。而且，DP-RP 薄膜配置在不同的驱动电流下显示出出色的颜色稳定性。由于微棱镜薄膜可以很容易地通过卷对卷工艺制造，微棱镜图案的 RP 薄膜可以替代传统的 RP 层，以实现 rpc-LED 的实际应用。