US Patent 7728236 Keypad and keypad assembly

A keypad includes an elastic layer for providing a restoring force to the keypad and an electric paper on the elastic layer, in which a plurality of key button regions for providing symbols in the form of images are defined. A keypad assembly includes a keypad, which has an elastic layer for providing a restoring force to the keypad and an electric paper on the elastic layer, in which a plurality of key button regions for providing symbols in the form of images are defined, and a switch board under the keypad for converting a pressure applied by a user to the key button region into an electric contact.