Study Of A Double-layer Driven-electrode Liquid Crystal Lens

Display technology is an important modern technology closely related to people's daily life.The display information in the future will develop in the direction of higher resolution and larger size,and 3D stereo display technology which can restore the reality of three-dimensional world is more and more concerned by researchers.In this paper,we realize the design and simulation of the liquid crystal(LC)lens by the optical software and the LC lens with a double-layer driven-electrode have been fabricated using lithography,vacuum coating and liquid crystal cell technology.With the corresponding driving circuit,the focal plane and pitch of the LC lens can be controlled,which can achieve number of viewpoints controllable and 2D/3D dynamic display.The contents are shown as follows:(1)Simulation design of liquid crystal(LC)lens.The auto-stereoscopic display system based on double-layer driven-electrode was established using Tracepro optical software and the illumination distributions have been simulated after the incident ray pass the LC lens.The simulation results show that the crosstalk of the visual display system of each viewpoint is 30.6%?30.2%and 30.4%respectively,which conforms to viewing demand.Further more,the relations between the working voltage of single-layer driven-electrode LC lens and the rotation of LC molecules or refractive index are simulated by TechWiz.LCD.3D software.The strcucture parameters of double-layer driven-electrode LC lens have been designed by the simulation results.And then,the the distribution of the relationship between the refractive index and electric potential has been simulated in the double-layer driven-electrode LC lens using TechWiz LCD.3D software.The simulation results show that the double-layer driven-electrodes LC lens could achieve different lens with different pitch when applied different working voltage.(2)Fabrication of double-layer driven-electrode LC lens.Indium-Tin Oxide(ITO)-SiO2-Al-doped ZnO(AZO)driving electrodes with double-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 45?m.The optical images show that ITO electrodes and AZO electrodes with the width of 91.87?m are parallelly interdigitated and isolated by SiO2 insulation layer on the glass substrate,which conforms to theoretical design.(3)The properties investigations of single-layer driven-electrode LC lens.The optical platform of LC lens has been built.The focal properties of single-layer driven-electrode LC lens with different parameters were analyzed by the analysis the focused light intensity collected by beam quality analyzer.The experimental results show that the focal properties of LC lens are the best when the working frequency is 1000Hz and orientation layer is anti-parallel,which consistent with the simulation result.(4)Functional test of the double-layer electrodes LC lens.The drive circuit of double-layer driven-electrode LC lens has been designed according to the simulation results of the relation between the LC molecular deflection angle and the driving voltage.The optical properties of LC lens have been investigated by the corresponding to drive circuit.The experimental results show that the LC lens can realize to the focal plane scan and the pitch controllability at different positions,which consist with the simulation results and design requirements.