Research On Flexible Optical-Driven Liquid Crystal Display Based On Polymer Doped

In today’s rapidly developing internet technology,people need to obtain a large amount of information through electronic products every day,so electronic display screens are very important.Since the 1960 s and 1970 s,liquid crystal displays have emerged,and after decades of development,they have now occupied a mainstream position in the display field.This article proposes a new implementation method for flexible liquid crystal display through extensive experiments,which involves mixing nematic liquid crystal E7 with liquid crystal monomer RM257 in a certain proportion,and using the polymer network formed by RM257 after UV curing as the spacer between two plastic substrates.The polymer network can effectively achieve a relatively stable state of the surrounding liquid crystal molecules,thereby achieving flexible liquid crystal display,And by applying an electric field to both ends of the liquid crystal box,the rewriting speed is effectively optimized,which enables the flexible display of the liquid crystal to have relatively excellent rewriting speed.The Optically Driving Liquid Crystal Display(ODLCD)studied in this article is a liquid crystal display based on optical orientation technology,which has the characteristics of low power consumption.It can display,save,and erase images through polarized light and can work without a backlight.The experimental research in this article is mainly divided into two parts.Firstly,the rewriting speed of ODLCD using traditional ITO conductive glass as substrate was studied.16 different concentrations of RM257 liquid crystal mixed solutions were prepared between 10%and 25%,and a voltage of 30 V was applied to the samples during UV curing.The effects of RM257 doping concentration and applied voltage on the rewriting speed of ODLCD were studied.The experimental results show that when the doping concentration is between 10%-16% and 21%-25%,the rewriting time will also increase with the increase of concentration.However,when the doping concentration is between 16%-21%,the rewriting time will decrease with the increase of concentration.The sample with 21% doping concentration has the optimal rewriting speed.The second part of the experiment mainly verified the feasibility of the flexible liquid crystal display proposed in this article.16 different concentrations of RM257 liquid crystal mixed solutions were also prepared between 10% and 25%,and a voltage of 30 V was applied to the samples during UV curing to explore the flexible display effect of the samples corresponding to different concentrations of RM257 liquid crystal mixed solutions.The results showed that when the doping concentration was 16%-18%,the flexible ODLCD had a relatively good display effect.In addition,the rewriting speed characteristics of flexible ODLCD samples corresponding to different concentrations of RM257 liquid crystal mixed solutions were also investigated.According to experimental results,the doping of liquid crystal monomer RM257 has an impact on the rewriting speed of flexible ODLCD,and the overall relationship is positively correlated.When the doping concentration is 10%-16% and 20%-25%,the rewriting time fluctuates in a small range,while when the doping concentration is 16%-20%,The rewriting time of the sample steadily increases with the increase of RM257 doping concentration,and the sample with a 12% doping concentration has the optimal rewriting speed.Based on two indicators,samples with a 16% doping concentration can achieve good flexible liquid crystal display and have better rewriting speed.And through bending experiments,it was found that flexible ODLCD samples with 16% doping concentration can adapt to bending at different angles and achieve normal display of image information.The maximum bending angle it can withstand is 50 °.In addition,by comparing and analyzing the experimental results of the two parts,it was found that the optimal rewriting time concentration corresponding to the ODLCD sample prepared with ITO glass substrate was 21%,while the optimal rewriting time concentration corresponding to the flexible ODLCD sample prepared with flexible PET conductive film substrate was 12%.Moreover,when the RM257 doping concentration was between 10%-17%,the rewriting time of the flexible sample was generally lower than that of the glass sample,while when the doping concentration was between 18%-25%,The overall rewriting time of flexible samples is higher than that of glass samples.