Patent ID: 6686549
Filing Date: 2004-02-03
Classification: G06F,H01H

Abstract:
An illuminated keyboard switch including:a push button having an indication part for letters, symbols, and pictures formed thereon; a cup-shaped elastic member disposed under the push button and forcing said push button upwardly; a light transmitting membrane switch disposed under said elastic member, said membrane switch having an upper contact and a lower contact that are brought into/out of contact with each other by pressing operation of said push button; a baseboard disposed on a bottom face of said membrane switch, said baseboard having a plurality of through holes provided in an outer peripheral position of the contacts of said membrane switch; and an electro-luminescence (EL) element disposed on a bottom face of said baseboard, said EL element having a light transmitting electrode layer, a light-emitting layer, and a back electrode layer that are sequentially formed on a light transmitting sheet.