灰度双稳态胆甾相显示的脉冲序列寻址

Pulse Sequence Addressing for Gray Scale Bistable Cholesteric Displays

在动态转换研究中,我们发现,双稳态胆甾相显示的反射率与双极脉冲的寻址序列有关。我们选用了对应于静态工作点高、低电压的两个不同的脉冲幅度。通过这种脉冲的适当排列,可得到用于灰度显示的最终等差反射。与均方根(rms)调制技术相比,该方案首次提出不主要依靠rms电压。在本文,我们研究的是电光和畴特性,并提出一种唯象观点来描述这种效应,同时把原来的驱动方案扩展到行寻址来演示灰度控制。

In the study of the transition dynamics. We found that the reflectance of bistable cholesteric on the addressing sequence of the bipolar pulses. Two different pulse amplitudes corresponding to the high and low voltages about the quiescent point were chosen. By a proper permutation of such pulses, the final reflectance of even difference could be obtained for gray scale display applications. In contrast with the root mean square(rms) modulation techniques, this scheme proposed for the frist time does not primarily depend on the rms voltage. In this paper, we study the electro optics and the domain characteristics, and propose a phenomenological proposition to this effect. We shall also extend our previous driving scheme to demonstrate the gray scale control at 5ms/line addressing.