| 摘要 |
PURPOSE:To prevent a dark part from being formed in a view area by arranging an image display face within the focal length of a lenticular lens plate and diffusing the transmitted light beam of the lens plate. CONSTITUTION:This device has the picture element display face 2 within the focal length of a lens element 11 and slightly diffuses and radiates light beam from directional picture elements L1 and L2 to expand the picture-element-L2 side border line of an emission optical path from the picture element L1 to an alternate long and short dash line L1N and the picture-element-L1 side border line of an emission optical path from the picture element L2 to an alternate long and two short dashes line. Namely, the surface 2 is positioned within the focal length of the lenticular lens plate 1 and then the light beams from the respective picture elements are diffused after being transmitted through the lens element 11 of the lens plate 1; and transmitted light beams from picture elements L1 - L4 are mutually close and never overlap at least nearly at a proper view distance, and no dark part area is formed. |
