An LED device that emits light in a pattern is disclosed. The LED device is a layer of active material that is sandwiched between a transparent substrate with an anode formed thereon and a cathode. The active material has a layer of light emitting material that emits light when electron/hole recombination...http://www.google.fr/patents/US6252253?utm_source=gb-gplus-shareBrevet US6252253 - Patterned light emitting diode devices
