| 摘要 |
PROBLEM TO BE SOLVED: To provide a display board free from degradation of display quality.SOLUTION: The display board includes: a light-transmissive substrate 18; a first halftone printing layer 13 formed on one surface 18a directed to the observer side, of the substrate 18; and a second halftone printing layer 14 formed on a surface of the first halftone printing layer 13. The first halftone printing layer 13 includes a first fixed-aperture ratio area 13a where an aperture ratio of dots is a prescribed value, a second fixed-aperture ratio area 13b where an aperture ratio of dots is another value other than the prescribed value, and a varying-aperture ratio area 13c where an aperture ratio of dots is gradually varied from the prescribed value to another value. The varying-aperture ratio area 13c is provided so as to connect the first fixed-aperture ratio area 13a and the second fixed-aperture ratio area 13b. |
