Investigation On Liquid Crystal Grating Based On 2D/3D Adaptive Display

We live in a three-dimensional(3D)world.With the rapid development of society and technology,flat panel display can’t satisfy people’s demand for viewing.In addition to high resolution and large size,people hope to realistically restore the real-world information.Therefore,3D display technology has been widely concerned.According to the simulation results of optical software,we prepared a novel liquid crystal grating using lithography,vacuum coating and liquid crystal cell technology,which can achieve number of viewpoints controllable and 2D/3D dynamic display in this paper.The contents are shown as follows:(1)The simulation and analysis of liquid crystal grating based on 2D/3D adaptive display.Firstly,the relations between the rotation of liquid crystal molecules and the transmittance are simulated in different voltage by TechWiz LCD.3D.the simulation results show that the liquid crystal molecules do not rotate and the transmittance of the liquid crystal cell is about 34%without working voltage;When the working voltage is fixed to be 4V,the liquid crystal molecules completely rotate and the transmittance of the liquid crystal cell is approximately 0%.Then,auto-stereoscopic display systems based on adaptive liquid crystal grating had been built by Tracepro software.The simulation results show that the viewpoints controllable and full resolution display can realize by adaptive liquid crystal,which conforms to viewing demand.(2)Fabrication of liquid crystal grating based on 2D/3D adaptive display.Indium-Tin Oxide(ITO)-SiO2-Al-doped ZnO(AZO)driving electrodes with two-layer staggered structure were prepared on the glass substrate using lithography and vacuum coating technology.Liquid crystal was sandwitched between the glass substrate with driving electrodes and form a cell with a thickness of 4μm.The optical images show that ITO electrodes and AZO electrodes with the width of 275.8μm are parallelly interdigitated and isolated by SiO2 insulation layer on the glass substrate.Electrical testing results show that the liquid crystal grating can realize the shading states and transmitting states with obvious contrast,which conforms to theoretical design.(3)Study on the photoelectric properties of 2D/3D adaptive liquid crystal grating.The relation between the SiO2 thin films and AZO thin films with different sputtering time and the transmittance of liquid crystal cell was analyzed using UV spectrophotometer.The results show that the prepared SiO2 film has high transparency in different sputtering time;the AZO film with sputtering time of 35min has high transmittance and low resistance;the transmittance fabricated the liquid crystal grating is approximately 33%,which is consistent with the simulation results.(4)Analysis of the driving principle and design of the drive circuit of liquid crystal grating.Various electrical signals obtained by the ingenious design of arithmetic driving voltage in the experiments.The liquid crystal grating which supporting the drive circuit was fixed to the optical microscope to test.The investigation results show that the liquid crystal grating can achieve point-wise controllable and realize number of viewpoints controllable and 2D/3D dynamic display.