The key parameters of projection display, including resolution, contrast, projection optics, optical throughput, color, light source and screen and their optimum method were described.

描述了投影显示关键参数（分辨率、对比度、投影光学、系统的光通量、彩色化、灯及屏幕）及优化方法。

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In this paper, a new method for the white-light image processing using speckle modulation screen is presented.

本文提出了白光图象处理的一种新方法——散斑调制屏法。

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Based on a method of bi-directional light tracking, it works out the best length of lamp-source and the distribution of lamp on the screen with this lamp-source.

采用射线跟踪法，通过模拟计算得到最优光源的长度和最优长度时，在灯前测试屏上照度分布。

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