An active layer of a light-emitting diode is surrounded jointly by a pair of clad layers and a pair of block layers. The active layer includes a light-emitting portion and a light-absorbing portion which are continuously formed in one body. The light-emitting portion emits light when...http://www.google.fr/patents/US5828085?utm_source=gb-gplus-shareBrevet US5828085 - Light emitting diode having light-emitting and light-absorbing regions
Light emitting diode having light-emitting and light-absorbing regions
