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LED强烈的调制速度是如此之快，人眼是察觉不到的，所以觉得输出(亮度)不变。
The LED intensity is modulated so rapidly that human eyes cannot notice, so the output appears constant.
本文讨论了位相调制彩色编码输出图象的色度、亮度随调制深度变化的规律。
The variation of brightness and chromaticity of output image with modulation depth in phase-modulated colour encoding image is investigated.
根据场发射显示器（FED）显示单元的调制特性和矩阵寻址方式特点，分析了其亮度控制的原理和实现方法。
The operation principle of luminance control of field emission display(FED) is introduced based on the modulating characteristic and the feature of matrix addressing.
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