동적 마스크를 이용한 3D 집적영상 디스플레이 시스템

Abstract

In this thesis, a novel method is proposed to improve the resolution and performance of the 3D display systems using recently attracted integral imaging technique. This thesis is largely divided into two parts. In the first part, a study to improve the resolution of 3D image displayed in the integral imaging display system is presented. The second part is a study for 2D/3D convertible display functions using the integral imaging system described in the first part. In the first study, an improvement method for 3D image in the depth-priority integral imaging (DPII) system is proposed. Originally, the DPII method can display 3D images through both real field and virtual field only using the basic devices including a lenslet array and a display panel. Therefore, it can provide not only 3D images with large depth due to both real and virtual fields but also simple structure of the integral imaging system. However, it has a disadvantage of the displayed image with low resolution because the 3D image resolution is determined by the pixel size of elemental lens in the lenslet array used in the integral imaging system. To improve the 3D resolution in this DPII system, an integral imaging method using time-multiplexed dynamic masks is proposed. The dynamic panel is located in front of the lenslet array. When the time-multiplexed mask patterns are displayed in the panel, the 3D resolution can be improved due to the reduction of the voxel size of observed 3D images. In addition, the computational generation method of elemental images is presented for the proposed time-multiplexed DPII method with dynamic masks. The imaging relationship between 3D object and elemental images is analyzed and the proper elemental images based on the imaging analysis are generated for the proposed time-multiplexed DPII method. The generated elemental images are obtained by shifting the object position for one fourth of elemental lens size in the proposed method compared with the conventional method. The optical setups for projection-type and flat panel display-type structure are implemented using the proposed method, and the experiments are performed to display 3D images optically using the generated elemental images. The improvement of 3D resolution by a factor of 4 was confirmed using 2x2 dynamic masks. In the second study a novel 3D/2D convertible integral imaging display system using dynamic masks is presented. The 3D/2D convertible technique is an essential function needed for next-generation 3D display using the transition period from conventional 2D displays. For the proposed method, the principles of the 3D, 2D, and 3D/2D modes are theoretically explained, and the generation methods of elemental images and mask patterns for each mode are presented. The optical display experiments are carried out by synchronizing the generated elemental images and mask patterns. Through the experimental results, the correct display results for 3D, 2D, and 3D/2D modes were confirmed. The experimental results of the 3D mode showed that the 3D resolution of 3D images with large depth could be improved. In the 2D mode, it is seen that the display images were displayed as the maximum resolution of the display panel. In addition, the 3D/2D mode is obtained through the optical display experiments using the spatial separation for 3D and 2D modes.