小型聚合物分散液晶薄膜光开关的研制

Preparation of Miniature PDLC Film Optical Switch

介绍了一种新型柔性液晶薄膜光开关的设计与制作。该薄膜型光开关利用聚合物分散液晶(PDLC)材料的电光特性,实现光开关的功能。描述了光聚合引发相分离法制备小型PDLC光开关的方法,包括材料选择、工艺路线和制备流程,并给出了测试方法与对比分析结果,得到了较优的制备方法。提出并实现了小体积驱动的制作以及一种较稳固的电极引出方式。实验结果表明,直径为10 mm的圆形PDLC光开关,阈值电压为4.316 V,饱和电压为13.938V,开启响应时间为2.6ms,关闭响应时间为96.7ms,对比度为11.46,具有小型、低压驱动的特点。

A novel optical switching based on polymerdispersed liquid crystal （PDLC） is presented. Utilizing the electro-optic properties of PDLC, the optical switching functionis realized.The PDLC films are prepared by photo-polymerization induced phase separation （PIPS）,and the detailed process including the material selection, process route and preparation flow is described. The electro-optic properties of PDLC are tested, compared and analyzed,and a better preparation method is obtained. A small volume driving scheme of optical switching is proposed and realized, and a stable method to extract the electrode is given. The experimental results show that the circular optical switching diameter is 10 mm, the threshold voltage is 4.316 V, the saturation voltage is 13.938 V, the turn-on response time is 2.6 ms, the turn-off response time is 96.7 ms, and the contrast is 11.46.The optical switch has the miniature and low-voltage-driven features.