| 主权项 |
1: An illumination device, comprising:
a light source; a light guide plate having a rectangular plate shape, a light-receiving face formed from at least one of a pair of edge faces forming opposing sides among outer edge faces of the light guide plate and into which light emitted by the light source is radiated, a light-exiting surface formed from one plate surface of the light guide plate and from which light exits, and an opposite plate surface formed from another plate surface of the light guide plate; and a light-exiting side anisotropic light focusing member disposed on a light-exiting side of the light guide plate, the light-exiting side anisotropic light focusing member being formed by arranging a plurality of light-exiting side light focusing units that extend along a first direction in a second direction, the first direction being parallel to a pair of edge faces of the light guide plate that do not include the light-receiving face, and the second direction being perpendicular to the first direction; wherein the light guide plate further includes: a light-exiting surface-side anisotropic light focusing portion that is disposed in the light-exiting surface of the light guide plate, and that is formed by arranging a plurality of light-exiting surface-side light focusing units, extending in the first direction, along the second direction; a light emission reflection portion that is disposed in the opposite plate surface of the light guide plate and that is formed by arranging a plurality of reflection units, extending in the second direction, along the first direction with gaps therebetween; and an opposite plate surface-side anisotropic light focusing portion that is disposed in the opposite plate surface of the light guide plate, and that is formed by arranging a plurality of opposite plate surface-side light focusing units, extending in the first direction, along the second direction. |
