Keypad apparatus for electronic device

PURPOSE: A keypad apparatus of an electronic device is provided to accomplish a thickness reduction by shaping whole a key button with a light guide plate through a UV molding. CONSTITUTION: A keypad apparatus of an electronic device includes a light guide plate(420), a light source(450) and a key input switch(430). A key button is shaped with the light guide plate into a whole. The light source is arranged on the single-side of the light guide plate. The key input switch is corresponded to the key button. A pressing protrusion is formed on the light guide plate to press the key input switch. A reflection pattern is formed on the partial domain of the light guide plate to cope with the key button. The reflection pattern reflects the light emitted from the light source to the key button.