This paper describes a glassless 3D screen system we propose that is capable of natural stereoscopic viewing with motion parallax in a wide viewing area. The system’s use of a ‘spatially imaged iris plane screen’ and ‘linear blending technology’ enables it to have fewer image sources and projectors than existing multi‐view projection systems.

We propose a 3D screen system that provides 360‐degree smooth motion parallax. We implemented a prototype using 60 projectors, which is one fifth the number for the conventional method, and the display area has a diameter of 1,200 mm. We show the optical configuration and the visual mechanism of depth perception.

A human representation system is developed that consists of a multi‐view display that uses a Quantized‐Diffusion‐Angle (QDA) screen and multiple cameras. A perspective transformation method is also developed to eliminate problems that occur in observing multi‐view displays.

A rotational multiview depth-fused 3D (DFD) display and 360-deg displaying optics using a spatially imaged iris method are proposed to realize a 360-deg 3D image. This method enables displaying clear floating images in a crystal ball. Its symmetric optics provide clear and natural 360-deg images with smooth motion parallax in horizontal and vertical directions using the directional selectivity of a spatially imaged iris method and natural 3D images of a rotational multiview DFD display.

A new autostereoscopic 3D display is proposed. Using only a small number of projectors, it produces smooth and exact motion parallax by applying the visual effects of dual edge perception in a depth‐fused 3D (DFD) display. It provides a breakthrough in overcoming the trade‐off between 3D image reality and the number of video sources.