| 摘要 |
A surface illumination device has a light source, a light guide plate that has a light-emitting surface and an opposite surface opposite to the light-emitting, wherein the light guide plate emits light introduced from the light source from a display region of the light-emitting surface, and a plurality of deflection patterns that are formed in the display region in at least one of the light-emitting surface and the opposite surface. The display region has a certain drawing pattern expressed by a set of the deflection patterns. Some of the plurality of deflection patterns are arrayed along an edge of the certain drawing pattern so as to rim the certain drawing pattern. |
