自由立体显示器垂直交错狭缝光栅的设计

Design of vertically staggered barrier for autostereoscopic display

针对传统的光栅式自由立体显示器设计方法中垂直光栅形成的莫尔条纹明显而斜光栅的对应可视区域较小这一问题。本文提出一种能减轻莫尔条纹的垂直交错光栅设计方法。以一个像素高度的1/2为单位对光栅进行分段,将相邻两段狭缝错开一定距离,减小通过同一狭缝看到两相邻子像素间黑条的比例,提高莫尔条纹中暗部分的亮度,从而减轻莫尔条纹。仿真及实测结果表明,垂直交错光栅比垂直光栅莫尔条纹亮度增加50%,而可视区域只减小28%,具有较高的实用价值。

In traditional barriers,Moiré fringe is very obvious in vertically aligned barrier and the viewing area is relatively small in slanted barrier.This paper presents a design of vertically staggered barrier which can reduce the Moiré fringe.The slits were divided into sections at half of a pixel height and the adjacent two sections were separated at a certain distance.This method can reduce the proportion of the perceived black matrix seen through the same slit,and thus increase the brightness of the dark part of the Moiré fringe.In this way weakened moiré fringes can be acquired.The simulated and measured results show that the vertically staggered barrier can increase the brightness of the Moiré fringes by 50% compared with vertical barrier with a decrease of only 28% for the viewing area.And it has higher application value for autostereoscopic display.