上个世纪60年代，科技工作者利用半导体p N结发光的原理，研制成了LED发光二极管。
In the 1960s, the use of science and technology workers semiconductor PN junction of the principle of developing a LED Lighting -emitting diodes.
上个世纪60年代，科技工作者利用半导体p N结发光的原理，研制成了LED发光二极管。
In the 1960s, the use of science and technology workers semiconductor PN junction of the principle of developing a LED Lighting -emitting diodes.
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