A novel full-parallax 3D display approach and image generating algorithm are demonstrated. The display system employs a panel display monitor, an array of mini-projectors, a rear projecting light beam and a special orthogonal diffuser. Image generation program is operated based on OpenGL programming. In order to validate the proposed theory based on spliced view-field, a compact prototype-equipment with LCD, Fresnel lens, directional diffuser and rear projecting structure is proposed. The 3D images and dynamic videos displayed by the system can be observed at different horizontal and vertical viewpoints, with more compact size and better use experience.