Preparation And Improvement On Display Volume For The Large Size Solid-state Volumetric True 3D Display

The solid-state volumetric true 3D display is a new type of stereo display technology. It can offer color full, clear and stable stereo images without 3D glasses, which can be provided with psychological depth and physical depth. Stereo display body is the core part of the solid-state volumetric true 3D display technology, which requires the performance of rapid switching of two different phases (imaging and non-imaging).The devices prepared by polymer-stabilized cholesteric textures are suitable for applying in the field of true 3D displays with simple structure, low power consumption, fast response, wide view angle and high contrast,In this paper, PSCT samples were prepared by means of polymerization induced phase separation. The influence of HTP, monomer structures and cell gap on polymer network morphologies and electro-optical properties of PSCT were studied by POM, SEM and liquid crystal composite parameter tester. It turned out that:1. As HTP increases, a tighter polymer network can be achieved, which results in higher threshold (saturation) voltage, fester response speed, and wider hysteresis width.2. The densest polymer network formed by the monomer LCM, which result in the largest driving voltage and fastest decay time.3. For reverse-mode PSCT, with the increase of cell gap, the polymer networks become looser which results in a faster field-off response time. The contrast ratio increases exponentially and the threshold voltage increases linearly with the cell gap.4. For normal-mode PSCT, with the increase of cell gap, the polymer networks become closer and the domain size becomes smaller, which results in faster field-off response time. The threshold electric field and the saturated electric field simultaneously increase with increasing cell gap, thereby improves the contrast ratio.On the base of studying above, the normal-white PSCT and normal-black PSCT in the application of the solid-state volumetric true 3D display were studied and discussed. It turned out that:The contrast of normal-white PSCT is low and the field-on transmittance decreases when the cell gap increases, thus it is not suitable for use in the solid-state volumetric true 3D display. When the cell gap of normal-black PSCT increases to 18μm, the response time of the device was lower than 1 ms and the field-on transmittance reaches 85% under the condition of best preparation. The contrast ratio is more than 80, which meets the demand of true 3D display system.