本文阐述了数字影像输出的第一大类领域：数字投影技术。
This paper presents the first main field of digital image output: digital projection technology.
在大屏幕投影显示领域，光引擎技术是获得大亮度、高影像清晰度和真实的色彩还原性图像输出的关键技术。
The technique of optical engine is the key to obtain high brightness, high definition and real colour pictures in the field of large screen projection.
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