Another lighting problem, brought about since the introduction of data projectors into classrooms, is glare reflecting off the projection screen into pupils' eyes.

还有一个因使用数码投影仪带来的光照问题，即学生常常受到从投影屏反射的强光照射。

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Sunlight reflecting off the many layers of the touch screen and LCD is the primary element that washes out the image, making fine detail difficult to distinguish and colors to become muted.

阳光从触摸屏的多个层次上反射使液晶显示器的图像不清晰，其细节很难区分、色彩暗淡。

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The optical system of the utility model comprises a reflecting lens, an optical lens, the projection screen, etc. Other parts comprises image films with various hair style patterns.

本实用新型的光学系统包括反射镜、透镜及投影屏等，其它部分包括载有各种发型模式影像的胶片。

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