Methods and apparatus are provided for ultraviolet (UV) water purification comprising UV C LED modules having improved light extraction efficiency. UV C LED dies (12) are solidly coupled to associated translucent output windows (14) such that light is transmitted directly from light emitting surface(s) of the dies (12) to output window(s) (14) of the LED package without propagation across interstitial air gaps. Gas to solid (and solid to gas) light transition boundaries are thus eliminated significantly reducing the amount of light lost through inter medium boundary reflection and thereby increasing efficiency of light extraction.
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机译：提供了用于紫外线（UV）水净化的方法和装置，其包括具有提高的光提取效率的UV C LED模块。 UV C LED裸片（12）牢固地耦合到相关的半透明输出窗口（14），以使光直接从裸片（12）的发光表面传输到LED封装的输出窗口（14）。不会在间隙气隙中传播。因此消除了气体到固体（以及固体到气体）的光跃迁边界，从而大大减少了由于介质间边界反射而损失的光量，从而提高了光提取效率。
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