蓝色发光二极管是氮化镓二极管,发光二极管由含镓(Ga)、砷(As)、磷(P)、氮(N)等的化合物制成的二极管,当电子与空穴复合时能辐射出可见光,因而可以用来制成发光二极管。在电路及仪器中作为指示灯,或者组成文字或数字显示。砷化镓二极管发红光,磷化镓二极管发绿光,碳化硅二极管发黄光,氮化镓二极管发蓝光。
每点包括三支微小的发光二极管:红色,蓝色和绿色。
Each point consists of three tiny light-emitting diodes: red, blue and green.
然而,这些发光二极管只产生冷的带有蓝色光晕的白光。
However, these LEDs tend to produce white light with a cool, bluish tinge.
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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