基于视差照明原理的自由立体显示几何建模

Geometry Modeling for Autostereoscopic Display Based on Principle of Parallax Illumination

在普通液晶显示器的背光源与LCD屏之间插入一块特殊的光栅板是主流自由立体显示器基本配置,照明盒与光栅板结合构成视差照明方式实现对LCD屏的照明。视差照明的基本功能是将LCD屏奇、偶像素列所对应的图像分别送入视者的左、右眼。本文从视差照明原理出发,依据几何光学原理建立自由立体显示器配置参数(光栅板和LCD屏的结构参数以及二者的位置等参数)与立体视觉参数(视者位置、双目瞳距和立体视带等参数)之间的关系的理论模型,为立体显示器的设计及其立体视觉性能评价提供理论支持。

The mainstream configuration of autostereoscopic display is to insert a shutter between liquid crystal display （LCD） screen and illumination box. Parallax illumination is composed with the shutter and the illumination box for illuminating the LCD screen, whose basic function is to send the pixels in the odd or even columns on the LCD screen into views＇ left or right eyes, respectively. In this paper, based on the optics principle of the parallax illumination, a model for the autostereoscopic display system is built up utilizing geometry. Therefore, the correlation between the system configuration parameters （such as dimension of pixels, the dimension of the shutter and the distance between the shutter and LCD screen）, and the stereovision parameters （such as observer＇s pupil distance, the distance between observer＇s face and LCD screen and the movable range of observer＇s poll）, has been driven from the model. Experiments identified the results with the tests on the products of DTI company USA.