Submillisecond-Response Vertical-Aligned Liquid Crystal for Color Sequential Projection Displays

Abstract

We developed a fluorinated, UV-stable, high birefringence and low viscosity liquid crystal mixture for projection displays. With this mixture in a thin-cell-gap LCOS, we can achieve submillisecond gray-to-gray response time at an elevated temperature, which enables color sequential projection displays with negligible color breakup.Index Terms-Color breakup, liquid crystal on silicon (LCOS), projection.

High Performance Negative Dielectric Anisotropy Liquid Crystals for Display Applications

“…In experiment, we prepared a mixture called UCF-N3 by doping 15.1 wt % lateral difluoro alkoxy-biphenyls, 8.9 wt % alkoxy-cyclohexane-phenyls, and 15.4 wt % alkoxy-cyclohexanebiphenyls [9,58], whose chemical structures are shown in Figure 1, into our M1 host in order to increase Δε while keeping a low viscosity. An excellent dark state was achieved in the entire nematic range.…”

65.1: A Vertically‐Aligned LCOS with Submillisecond Response Time

“…Both rise time and decay time are calculated between 10% and 90% reflectance change. From the simulation we find the rise time is 0.26 ms and decay time is 0.40 ms. We also calculated the grayto-gray (GTG) response times of the VA LCOS [21]. Taking green color as an example, the VR curve was uniformly divided into eight gray levels (1)(2)(3)(4)(5)(6)(7)(8) The estimated operation temperature range for the proposed color sequential VA-LCOS is from 20 o C to 70 o C. As the operation temperature decreases, the response time would be slower because of the increased γ 1 /K 33 [22].…”

Holographic display technology based on liquid crystal device

“…In addition, the LCoS uses nematic and chiral smectic LC electrooptic material in direct contact with silicon integrated circuits to improve light transmittance, so this kind of SLM appears in many holographic display systems and multichannel imaging. In recent years, researchers have developed a new device with blue‐phase LC (BPLC) for phase‐only modulation based on an LCoS, which allows a laser beam to traverse the BPLC layer four times and helps suppress the fringing field effect of a high‐resolution LCoS, as shown in Figure . Besides, submillisecond response LCoS has been proposed and the BPLC with submillisecond response for reflective SLM has also been proposed to meet the requirement of holographic display, and the holographic display with large viewing angle has been proposed by using the electrolyte LCoS with the pixel size of 1 μm …”