A computer generated hologram (CGH) requires a high-resolution device to represent a hologram data. I
propose a new three-dimensional display method that has the expanded viewing zone and a large object size
with a low-resolution device. Using the method, I developed a portable three-dimensional display system that
shows 3D objects in the area of 4x2 cm. The display showed three-dimensional images which were full parallax,
autostereoscopic and viewed binocularly. It is small and lightweight enough to carry by a hand. Moreover, it is
assembled at a low cost and uses a low-price transparency sheet with 4000dpi.