提出了一种使用介电突起消除边缘场效应的硅基液晶显示器 (Liquid Crystal on Silicon, LCoS)。在像素电极之间设计介电突起结构来阻隔相邻像素电极之间的串扰电场, 通过对LCoS的液晶分子指向矢分布和边缘场串扰现象进行仿真, 分析了边缘场效应产生的机理及其影响因素, 并对相应反射率和相位进行了计算和对比。具有介电突起的LCoS相比传统LCoS在减少相邻像素边缘反射率和相位干扰上有明显的效果, 反射率始终维持在96%, 相位差保持不变, 对比度大于35∶1的区域接近60°, 整体视角基本不受影响。所提出的介电突起能够很好地消除横向电场对相邻像素内液晶分子取向的影响, 进而提高了LCoS的对比度, 大大改善了显示效果。

An LCoS (Liquid Crystal on Silicon) using dielectric protrusions to eliminate fringe field effect is proposed. The dielectric protrusion structure is designed between the pixel electrodes to block the crosstalk electric field between the adjacent pixel electrodes. The liquid crystal molecular director distribution and fringe field crosstalk of the LCoS are simulated, the mechanism of fringe field effect and its influencing factors are analyzed, and the corresponding reflectivity and phase are calculated and compared. The LCoS with dielectric protrusions has a significant effect on eliminating the edge reflectance and phase interference of adjacent pixels compared to the traditional LCoS. The reflectance is always maintained at 96%, the phase difference remains unchanged, areas with contrast greater than 35∶1 are over to 60° and the overall viewing angle is largely unaffected. The proposed dielectric protrusion can eliminate the influence of the transverse electric field on the orientation of liquid crystal molecules in adjacent pixels, which improves the contrast of LCoS and greatly improves the display effect.