蓝相液晶显示:下一代颠覆性技术

Blue-Phase Liquid Crystal Display:Next Disruptive Technology

自从2002年Kikuchi发现了利用稳态聚合物拓宽蓝相液晶温度范围和2008年三星展示了第一台蓝相LCD样机,整个世界对这个颠覆性技术的到来充满了期待。以克尔效应为基础的蓝相液晶技术拥有以下优点:微秒级响应时间,无需定向层,暗场时光学上是各向同性,视角大,透过率对液晶盒厚度不敏感,易于大屏制作等。对于场序性的RGB LED色彩,可以降低动态伪像,同时光学效率和分辨率可以提高3倍。然而,还有一些"瓶颈"问题需要在广泛应用之前克服,例如高操作电压、反应滞后、双折射残留和图像残留。本文将会介绍关于这些基本问题的最新进展,和一种新的具有低操作电压、高透过率、无滞后和双折射残留的蓝相LCD。蓝相液晶时代曙光将呈现在我们眼前。

Since Kikuchi developed a polymer-stabilization process for widening the blue-phase liquid crystal temperature range in 2002 and Samsung demonstrated the first blue-phase LCD prototype in 2008, whole world is waiting for the era of this disruptive technology to come. The Kerr-effect-based blue-phase LCD exhibits several revolutionary features, such as microsecond response time, no need for alignment layer, optically isotropic dark state for inherently wide view, and cell gap insensitivity for easing fabrication provided that in-plane switching electrodes are employed. With sequential RGB LED col- ors, the spatial color filters can be eliminated so that both optical efficiency and resolution density are tripled. However, some bottlenecks such as high operation voltage, hysteresis, residual birefringence, and image sticking, remain to be over- come before its widespread application can be realized. In this talk, I will report recent progresses addressing these funda- mental problems. A new blue-phase LCD with low operation voltage, high transmittance, and free from hysteresis and re- sidual birefringence will be described. The dawn of the blue-phase LCD era is on the horizon.