| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of efficiently manufacturing a longitudinally extending light diffusion film having an effectively increased incident light diffusion area.SOLUTION: A method of manufacturing a longitudinally extending light diffusion film 20 having prescribed louver structures includes steps (a) to (e) as follows: (a) a step for preparing a light diffusion film composition, (b) a step for forming a first coating layer, (c) a step for irradiating the first coating layer with a first active energy ray using a linear light source to form a first louver structure 13a, (d) a step for forming a laminate comprising the first coating layer and a second coating layer, (e) a step for irradiating the second coating layer with a second active energy ray using the linear light source to form a second louver structure 13b such that, looking from the top, an acute angle between a longitudinal direction of the linear light source during the first active energy ray irradiation and a longitudinal direction of the linear light source during the second active energy ray irradiation is within a range of 10 to 90 degrees. |
