色调涉及到阴影以及物体颜色光亮程度；结构涉及到物体的外观特征。

Tone refers to shading of light and dark on an object and texture is the visual and tactile surface characteristics of an object.

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该方法可以改善投影光源的工作条件，增强光源的光 能的利用率，以较强颜色光亮度为基准达到所需色平衡。

When the color beam from color auxiliary light source adding to the projection light source reaches the need balance, the beam is output in the projection direction.

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