Driving method to reduce data refresh rate in nematic liquid crystal optical phased array

摘要：

The structure of a storage capacitor in nematic liquid crystal optical phased array causes the data refresh rate to be higher than the liquid crystal switching frequency, which demands a high data bandwidth. A novel driving method was therefore proposed to reduce the data refresh rate. Without using a storage capacitor, the proposed method uses digital scanning instead of conventional analog scanning. Furthermore, digital scanning is able to drive all pixels in parallel and transmit driver data only once for one frame. 1-D nematic liquid crystal optical phased array was used to test the novel driving method. During the experiment two frames of driver data were alternately transmitted at a refresh rate of 10 Hz, and diffraction patterns were acquired. Experimental results demonstrate that the proposed method can be used to keep the data refresh rate lower than the liquid crystal switching frequency.

关键词： Nematic liquid crystal optical phased array pulse-width modulation data refresh rate

作者: Liu Xiang Zhang Jian Wu Liying Xu Lin

作者单位: School of electrical engineering and automation in Harbin Institute of TechnologyHarbin, 150080, Chi School of electrical engineering and automation in Harbin Institute of Technology Harbin, 150080, Ch

会议类型: 国际会议

会议名称: 第五届仪器科学与技术国际学术会议(ISIST 2008)Fifth International Symposium on Instrmentation Science and Technology

会议地点: 沈阳

会议语种:英文

页码: 1-6

在线出版日期: 2008-09-15（万方平台首次上网日期，不代表论文的发表时间）