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梯形凸起电极液晶变焦透镜

Tunable liquid crystal lens with raised trapezoidal electrodes

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摘要

液晶变焦透镜由于其结构紧凑, 低功耗, 性能稳定, 易于制备等特点, 在图像处理, 光通信, 机器视觉, 可切换2D/3D显示等方面应用广泛,但是工作电压高阻碍了其实际应用和商业化。本文提出了一种梯形凸起电极结构的液晶变焦透镜, 用TechWiz LCD 3D软件模拟了此种结构的电场和液晶分子分布, 对比分析了液晶盒厚、电极高度、电极梯角和电极宽度与间隔比对液晶透镜工作电压的影响。模拟结果显示, 当液晶盒厚为10 μm时, 液晶透镜的驱动电压可以降低到10 V以内; 在焦距变化范围相同的情况下, 梯形凸起电极液晶透镜比传统的平面电极液晶透镜的工作电压降低了358%。对于梯形凸起电极结构的液晶变焦透镜, 当电极高度占液晶盒厚40%, 电极梯角选为60°, 电极宽度与间隔比为100∶50时, 其工作电压最低。

Abstract

Tunable liquid crystal (LC) lenses are expected to have potential applications in image processing, optical communication, machine vision and 2D/3D switchable display due to their advantages of compact structure, low power consumption, good stability, and simple fabrication. However, the high operating voltage of tunable liquid crystal lens has been a significant technical barrier to practical applications and commercialization. In this paper, we propose a tunable liquid crystal lens with raised trapezoidal electrodes and simulate the distribution of electric field and the liquid crystal molecules using software of TechWiz LCD 3D. In addition, we compare and analyze the influence of cell gap, electrode height, trapezoidal angles and electrode width and spacing ratio on operating voltage of tunable liquid crystal lens. Simulation results show that the operating voltage of liquid crystal lens can be less than 10 V when the cell gap is 10 μm. Tunable liquid crystal lens with raised trapezoidal electrode has lower operating voltage than that with planar electrode under the condition of the same focal length range and the operating voltage is reduced by 35.8%. Furthermore, the operating voltage of tunable liquid crystal lens with raised trapezoidal electrodes can be the lowest, when the electrode height takes up 40% of the cell gap, the angle of trapezoidal electrode is 60°, electrode width and spacing ratio is 100∶50.

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中图分类号:O439

DOI:10.3788/yjyxs20183301.0030

所属栏目:材料与器件

基金项目:国家自然科学基金(No.61675153)

收稿日期:2017-07-11

修改稿日期:2017-08-15

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吕文明:天津大学 精密仪器与光电子工程学院, 天津 300072光电信息技术科学教育部重点实验室(天津大学), 天津300072
张红霞:天津大学 精密仪器与光电子工程学院, 天津 300072光电信息技术科学教育部重点实验室(天津大学), 天津300072
宋晓敏:天津大学 精密仪器与光电子工程学院, 天津 300072光电信息技术科学教育部重点实验室(天津大学), 天津300072
贾大功:天津大学 精密仪器与光电子工程学院, 天津 300072光电信息技术科学教育部重点实验室(天津大学), 天津300072
刘铁根:天津大学 精密仪器与光电子工程学院, 天津 300072光电信息技术科学教育部重点实验室(天津大学), 天津300072

联系人作者:吕文明(2015202048@tju.edu.cn)

备注:吕文明(1990-),女, 山东泰安人, 硕士研究生, 从事液体变焦透镜研究。

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引用该论文

LV Wen-ming,ZHANG Hong-xia,SONG Xiao-min,JIA Da-gong,LIU Tie-gen. Tunable liquid crystal lens with raised trapezoidal electrodes[J]. Chinese Journal of Liquid Crystals and Displays, 2018, 33(1): 30-37

吕文明,张红霞,宋晓敏,贾大功,刘铁根. 梯形凸起电极液晶变焦透镜[J]. 液晶与显示, 2018, 33(1): 30-37

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