The widespread use and application of in-plane switching liquid crystal displays (IPS-LCDs) is limited by their slow response. In this letter, a fast-response IPS-LCD with a protrusion structure is proposed. The gray-to-gray response time of the IPS-LCD is reduced by 20% to 30%. The difference in cell gap induced by the protrusion accounts for the faster response. Moreover, the viewing angle and gamma shift of the proposed IPS-LCD are simulated and found to be better than that of conventional IPS-LCDs.

A homogeneous-aligned, high-transmission, and fast-response liquid crystal display (LCD) with three-layer electrodes is proposed. The molecules of liquid crystals are more inclined to rotate above and between the pixel electrodes. This induces a much higher transmission than that of the cell driven by the fringe field switching method and a wide viewing angle simultaneously because of the combined fringe and in-plane electric fields. Furthermore, a trigger pulse voltage is applied between the top and common electrodes to forcibly align the liquid crystal molecules vertically to show the transient dark state, which results in a very fast turn-off time (>>1 ms). With high degree of transmission and fast response time, this kind of LCD is a potential candidate for large LCD panels.

制备出大液晶微滴的具有压光效应的聚合物分散液晶膜，给出样品按压前后偏光显微镜对比照片。提出压缩液晶微滴模型，采用Fortran软件模拟计算了压光效应液晶微滴双折射透光率分布，用Origin软件作图，计算结果绘图与偏光显微镜图片一致。定义按压后液晶微滴圆球变扁球的扁平度，计算按压后序参数与扁平度的关系，说明按压作用使液晶微滴形同单轴晶体，进而对聚合物分散液晶膜压光效应给出原理解释。

报道了一种聚合物分散液晶（PDLC）膜在压力作用下从散射膜变为透明膜的实验现象，建议称之为PDLC膜的压光效应。介绍了与压光效应相关的PDLC的应变液晶、剪切液晶和拉伸液晶等概念；给出PDLC压光效应膜样品照片，偏光显微镜照片，电光特性光谱分析和压光效应光谱分析。提出PDLC膜压光效应的原理猜想，给出对PDLC膜光学性质的重新认识，认为只要每个液晶微滴中液晶分子取向一致了，无论不同微滴间液晶分子取向一致与否，PDLC膜都将透明。PDLC膜压光效应将对液晶基础科学提出新课题，将在许多不用加电的新型压光器件（按压窗、功能玻璃和光纤压力传感器等）领域有应用前景。

Liquid crystal in a nematic liquid crystal cell surface with two crossed-grating surface substrates can be oriented along the normal grating direction with given geometric parameters of groove and anchoring strength. This display is equivalent to multi-domain vertical-alignment mode. It has a relatively wide viewing angle. In this letter, we investigate the viewing angle characteristics of this kind of cell. The viewing angle dependence of contrast ratio is obtained using the extended Jones matrix method, which also considers the flexoelectric effect. The viewing angle is dependent on the geometric parameter of grating surface, the flexoelectric coefficients, and the anchoring strength. Therefore, appropriate value for each factor needs to be selected to obtain a better viewing angle of this cell.

根据图像的几何结构特性,从人类视觉系统特性出发,建立了Gabor感知多成份字典,进而模拟人类视觉通路的层次处理机制,构建了稀疏编码网络,能够有效去除图像中的高阶冗余,形成更为稀疏的表示。对稀疏表示系数重组后进行比特平面量化,实现了低比特率的可伸缩编码。实验结果表明,在低比特率下,本文算法压缩后重构图像的感知质量要明显优于JPEG2000,峰值信噪比也与其相当,并且对于图像中的边缘和纹理等细节保持效果更佳。