| 摘要 |
PROBLEM TO BE SOLVED: To variously adjust a characteristic of emitting light by being applied to a surface light source or the like which is constituted so as to emit illuminating light in the front direction of an emitting surface even if a sheet material which corrects the directivity of emitting light is not especially arranged with respect to a light introducing plate, the surface light source and a display. SOLUTION: Plural projections 19, which have at least a pair of slopes crossing by forming a ridge line so as to approach the surface facing the emitting surface according as the projection leaves the incident surface, are formed in the surface 15B facing the emitting surface, and fine projecting and recessing parts are formed between these projections. |
