Because of brightness and directionality, laser has become into an excellent projectionlightsource.
由于激光的高亮度和极好的方向性，使之成为非常理想的投影光源。
2
When the color beam from color auxiliary lightsource adding to the projectionlightsource reaches the need balance, the beam is output in the projection direction.
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。
3
The key parameters of projection display, including resolution, contrast, projection optics, optical throughput, color, lightsource and screen and their optimum method were described.