Patent ID: 7935904

Claim:
A keypad assembly comprising: a main board having at least one metal dome disposed on a predetermined position of the main board; and a keypad disposed on the main board, for applying a pressure on the at least one metal dome and being used as a touchpad according to a mode selection, wherein the keypad includes: a keytop layer having at least one keytop on which a plurality of predetermined alphanumeric characters is stamped; a touchpad layer disposed under the keytop layer; a base layer disposed under the touchpad layer, the base layer having at least one protrusion protruding from a bottom surface of the base layer at a position corresponding to the at least one metal dome; and a backlight Electro-Luminescence (EL) sheet interposed between the base layer and the touchpad layer to provide light to the at least one keytop and a barrier film provided to prevent interference between the backlight EL sheet and the touchpad layer.