Now, one of the main factors influencing the high resolution image is the dead zone. Firstly, based on the current static Volumetric 3D Imaging (V3DI) display systems, the imaging principles are described. And then, several reasons for dead zone existing are analyzed in detail, such as visual dead zone, voxel overlapping dead zone and voxel distortional dead zone et al. Meanwhile, in order to get a high resolution image, some effective approaches to solve these problems are given, such as structural design of integrated beam-splitter folded path for rear projection displays, imaging method based on rotating helix screen. Finally, a novel V3DI display system is built with the support of the theory of studying results. The experimental results show the system can weaken the dead zone effect, and acquire very high image quality.