所以，现在家用的LED是将蓝色的发光二极管的外壁涂上粉末状的磷，其中含有的稀土元素可以把蓝光过滤掉。

So the LEDs found in current household applications are blue diodes daubed with a powdered coating called a phosphor, which includes rare-earth elements that filter blue light.

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2014年，诺贝尔物理学奖被授予了蓝色氮化镓电致发光二极管的研发。由此可见，蓝光的释放对于多色和白色电致发光二极管的研制是至关重要的。

For the production of a multicolour or white LED, emission of blue light is crucial the 2014 physics Nobel prize was awarded for the development of blue gallium nitride LEDs.

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