Patent ID: 8507941
Filing Date: 2013-08-13
Classification: H01L

Abstract:
1. An illuminator comprising: an LED array comprising a first terminal and a second terminal wherein said LED array comprises: at least one template comprising: a first LED comprising: a first layer with a first conductivity on said template; at least one mesa on said first layer; a light emitting quantum well region on each said mesa; a second layer with a second conductivity on each quantum well region; a first electrical contact in electrical connection with said first layer; a current spreading layer in electrical connection with said first electrical contact wherein said current spreading layer is no further than a current spreading length from any portion of said first layer; a second electrical contact in electrical connection with each said second layer; and wherein said first electrical contact is electrically connected to one of said first terminal and said second terminal and said second electrical contact is electrically connected with the other of said first terminal and said second terminal; a second LED comprising: a third layer with a third conductivity on said template; at least one second mesa on said third layer; a second light emitting quantum well region on each said second mesa; a fourth layer with a fourth conductivity on each second quantum well region; a third electrical contact in electrical connection with said third layer; a second current spreading layer in electrical connection with said third electrical contact wherein said second current spreading layer is no further than a current spreading length from any portion of said third layer; a fourth electrical contact in electrical connection with each said fourth layer; wherein said third electrical contact is electrically connected to one of said first terminal and said second terminal and said fourth electrical contact is electrically connected with the other of said first terminal and said second terminal; whereby, when an alternating current is applied to said first terminal and said second terminal each of said first LED and said second LED emit ultraviolet light cyclically at a frequency corresponding to the frequency of said alternating current.