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LED为什么是第四代光源(绿色照明)?
Date: 2015-4-19 0:02:19 Source: admin | Views: 1607
按电光源的发光机理分类:第一代光源:电阻发光如白炽灯.第二代光源:电弧和气体发光如钠灯.第三代光源:荧光粉发光如荧光灯.第四代光源:固态芯片发光如LED.
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