A surface light source (3, 4, 5) includes a light guide plate (32, 42, 52), which defines an incident surface (321, 421, 521), an emitting surface and a bottom surface (323, 423, 523) opposite to the emitting surface; and a light source (31, 41, 51) adjacent to the incident surface of the light guide...http://www.google.es/patents/US6991359?utm_source=gb-gplus-sharePatente US6991359 - Surface light source and light guide plate having differently configured dots
Surface light source and light guide plate having differently configured dots
