光学学报, 2012, 32(1): 0105001, 网络出版: 2012-01-01

三维显示中基于彩色叠栅条纹的视差障栅参数设计

Parameter Design of Parallax Barrier Based on Color Moiré Fringe in Three-Dimensional Displays
作者单位

1中国科学院长春光学精密机械与物理研究所, 吉林 长春 130033

2中国科学院研究生院, 北京 100049

摘要
为确定三维显示中视差障栅(PB)的最优参数,提出一种基于彩色叠栅条纹的PB参数设计方法。液晶显示器(LCD)和PB简化为相应参数的黑白光栅模型,而具有特定参数的特定辐射光栅作为周期和倾角变化的PB模型,通过序数方程和傅里叶分析方法分析特定辐射光栅和LCD单色等效黑白光栅的叠加图样,由此推断出不同PB周期的低频主导条纹频率组项,然后利用傅里叶理论的部分和提取方法(PSE)分析不同PB周期的低频主导叠栅条纹的强度轮廓,得出PB的最佳节距和相应倾斜角度。实验结果表明,所设计的PB三维显示系统没有出现降低像质的叠栅条纹,具有较好的三维显示效果。
Abstract
In order to confirm appropriate parameters of parallax barrier (PB), a parameter design of PB based on a color Moiré condition in autostereoscopic displays is proposed. Liquid crystal display (LCD) and PB are approximated as the two corresponding binary gratings. Special radial grating is considered as the equivalent model of PB with varying periods and angles. Superposition of the equivalent grating for display device and special radial grating can be analyzed by indicial equations method and Fourier theory. Different predominant low-frequency terms in case of different period of PB can be confirmed. The Moiré-fringe intensity profile in all cases can be obtained by partial sum extraction in Fourier theory. Optimal period and corresponding angle of PB are obtained. Experiment result shows that the autostereoscopic displays have almost invisible Moiré patterns and show good autostereoscopic image.
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