一种背投影单元无缝拼接技术研究

背投影拼接显示屏一直被显示图像上存在的图像拼缝所困扰,根据背投影显示原理,分析了图像拼缝产生的原因,提出扩大投影光范围,采用光楔导光的方法将边缘投影光线引入拼接缝,利用全反射临界角原理使进入拼接缝的光线可以近似垂直的方向投射到屏幕上,使图像可以连续跨越拼接缝显示,完全消除了所显示图像上的拼缝黑线,实现了背投影拼接显示屏真正的无缝显示。

Seamless tiled display based on rear projection

Tiled displays systems built by combining the images from arrays of rear projection cubes can provide huge numbers of pixel elements to applications needing to visually represent lots of information. It is, however, puzzled by the gaps between adjacent cubes, the gaps is viewed as black lines in the displaying picture. The reason of the black lines is analyzed and the solution of eliminating the black lines is proposed. By zooming in the projection image, the edging projection rays are led into the gaps using optical wedge at screen border. The rays strike out lateral surface of screen with approaching total inner reflection angle and refractive then incident normally to the screen. The experiment indicates the picture can be displayed through the gaps without any black or gray lines.