| 摘要 |
PURPOSE:To obtain a titled screen whose luminance is even and whose hue failure scarcely occurs by shifting the center of a light absorbing layer toward the center line of a lens sheet by a specified value from a back face position corresponding to a border line of each lenticular lens. CONSTITUTION:A Fresnel lens sheet 5 and a lenticular lens sheet 6 are placed so that each lens face is opposed to each other, and on a non-lens face of the sheet 6, a light absorbing layer 7 is provided right under a boundary of each lens, in the center part of the sheet 6, and is provided near a center line 8 of the lens sheet by (d) having relation of the equation [(d), (t), R, F and (n) denote a shift, thickness of the sheet 6, a distance between an incident position of light to the sheet 6 and the center of the sheet 6, a focal distance of an observation side of the sheet 5, and a refractive index of a material of the sheet 6, respectively], as said layer approaches both the left and right ends of the sheet 6. In this way, it is possible to obtain a titled screen being suitable for projection of a color television, whose luminance is even and whose hue failure scracely occurs. |
