A lighted switch illuminator which solves a problem of a conventional device in that it was difficult to reduce its thickness and size because the electroluminescent (EL) layer functioning as an illuminator is adhered to a separate film click board. An EL layer is directly formed on a film click board...http://www.google.es/patents/US5901834?utm_source=gb-gplus-sharePatente US5901834 - Lighted switch illuminator and its fabrication method
Lighted switch illuminator and its fabrication method
