| 摘要 |
PROBLEM TO BE SOLVED: To allow an illuminating device and a display device to emit high luminance light and to make an image or Moire of a light deflection element hard to see.SOLUTION: An illuminating device 3 is provided with a light guide body 7 where widths of adjacent unit lens 7d differ from each other; a light deflection element 18 configures unit columns arranged at a certain average pitch Land one or more unit groups arranged in the way that the farther away they are from a light incident surface 7L, the smaller an adjacent interval becomes; arrangement density of the light deflection element 18 gradually increases in the direction away from the light incident surface 7L; the unit columns in the unit groups are provided in the way that an arrangement of the light deflection elements 18 in an X direction is different from an arrangement of two or more columns thereof in the neighborhood in a Y direction; and in at least unit groups near the light incident surface 7L, an average pitch Land an alternate row adjacent interval Lsatisfy 2a≤L≤4G, 2a≤L≤4G, and 2S/LL≥0.01. |
