A button input apparatus with a display function, which generates a switch signal in response to a user's press, and a portable electronic device having the same. The button input apparatus includes: a plurality of lever buttons each having a transparent window in at least a portion thereof, and one...http://www.google.de/patents/US7294794?utm_source=gb-gplus-sharePatent US7294794 - Button input apparatus with display function and portable electronic device having the same
