光栅式立体显示器重影问题的研究

Research on Ghosting of Parallax Barrier Displays

光栅式自由立体显示设备由于存在重影问题而限制了它们在商业上的应用,文章从潘弄区和可视区域两个角度分析了光栅式自由立体显示设备产生重影问题的理论原因,并建立一个光学结构模型,推导出人眼所看到的实际像素强度公式。给出一种定义重影度的方法,经软件仿真得到重影度与人眼到显示屏幕距离的关系曲线,基于上述模型和定义对重影问题的改善进行了探讨。软件仿真结果显示通过改善边缘光栅结构能在一定程度上增大可视区域,减小人眼看到重影的几率。

The commercial application of stereoscopic displays based on parallax barrier are restricted with ghosting. In this paper, the theoretical reason of ghosting is analyzed from the aspects of Panum＇s area and viewing zones. An optic structural model of the displays is built, and formulas of the pixels intensity that are seen by human eyes are also deduced. A method of ghosting definition is given, the relation curve between the extent of ghosting and the distance of the viewer and the screen is obtained, and the improvement of ghosting is discussed based on the above modeling and definition. The result of software simulation shows that by improving the barrier structure, the viewing zones are increased and the probability of ghosting is decreased.