The present invention includes a smart controller for electroluminescent lamps which compensates for a range of RC time constants and adjusts its output frequency accordingly such that a relatively uniform light output is obtained on all illuminated areas of large EL display panels. The controller incorporates...http://www.google.es/patents/US6465969?utm_source=gb-gplus-sharePatente US6465969 - Electroluminescent display intelligent controller
