Research On The Optimizati Of Rewriting Time Based On Optically Driving Liquid Crystal Display

With the progress and development of the scientific and technological society,people's requirements for the liquid crystal display(Liquid Crystal Display,LCD)for daily use are gradually increasing,which puts forward higher requirements for LCD.The traditional cathode ray tube display(Cathode Ray Tube,CRT)can no longer meet people's needs,and the optically driving liquid crystal display begins to enter people's field of vision.Optically Driving Liquid Crystal Display(ODLCD)is a new type of liquid crystal display developed using light-controlled orientation technology.This display has ultra-low power consumption,and different pixels on its panel can be used without any backlight.Different images can be displayed by adjusting the polarized light under the condition of electricity and electricity,and the images can be saved and erased.However,the research and development of ODLCD is hindered to a large extent because the rewriting time of ODLCD is too long.Based on reducing the rewriting time of ODLCD and improving the performance of liquid crystal display,this paper studies the rewriting time of ODLCD using the current mainstream light-controlled orientation technology.The contents are as follows:1.The relationship between the rotational viscosity of liquid crystal molecules and the rewriting time was studied.It can be seen from the literature that the azimuthal anchoring energy can affect the twist angle of liquid crystal molecules,and the twist angle can directly affect the rotational viscosity of liquid crystal molecules.(5CB?E7?TN-0403?MLC-6080? ZCM-5063 xx and ZLI-5700-100)measured the relationship between their azimuthal anchoring energy and torsion angle,and obtained through experiments that the 5CB liquid crystal in the 6 groups of liquid crystals can reach a torsion angle of 87° under the same azimuthal anchoring,best effect;2.The relationship between azimuth anchoring energy and transmittance is studied.The relationship between the azimuthal anchoring energy and the transmittance of the above 6 groups of liquid crystals was measured respectively.Through experiments,we obtained that under the same anchoring energy,the transmittance effect of the 5CB liquid crystal molecules in the 6 groups of liquid crystals is the best.Well,combined with the advantages of 5CB liquid crystal twist angle and transmittance,5CB liquid crystal is selected to study the relationship between ODLCD rewriting time and voltage;3.The influence of electric field on rewriting time of ODLCD was studied.For 5CB liquid crystal,voltages of 0V,15 V,30V and 45 V were applied to both ends of the liquid crystal cell to measure the rewriting time corresponding to different voltages.When no electric field is applied,the rewriting time is 25 seconds,and when the voltage is increased to 45 V,the rewriting time is reduced to 7 seconds,a decrease of about 4 times.Then,the fitting curve of the rewriting time under the voltage of 0-45 V was calculated by the formula of rewriting time and rotational viscosity,and the experimental data was compared with the fitting curve to verify the theory that the electric field can change the rewriting time;4.The effect of polymer doping on the rewriting time of ODLCD was studied.For the mixed solution of RM 257 and liquid crystal,9 groups of mixed solutions with different concentrations(0%-15%)were set up to explore the effect of polymer concentration on the rewriting time of ODLCD.It is obtained through experiments that when the concentration of polymer RM257 is 5%,the corresponding rewriting time is 4.1 seconds.When the polymer concentration is too high,the rewriting time of the ODLCD will be affected due to the generated polymer grids;5.The effect of voltage on rewriting time of ODLCD under polymer doping was studied.To 9 groups of mixed solutions of different concentrations,apply a DC voltage of 0-30V(the progressive voltage is 5V),and record the rewriting time corresponding to each concentration under different voltages.It can be seen from the experiment that the rewriting time of the mixed solution at each concentration decreases with the increase of the voltage.And for the mixed solution at 5%concentration,the rewriting time is reduced from 9.2 seconds at 0V to 4.1 seconds at 30 V,and the rewriting time is reduced by more than 2 times.Through experiments,the effect of voltage on the rewriting time of ODLCD under polymer doping is studied,and some ideas and ideas for reducing the rewriting time of ODLCD are provided.