Display apparatus using light synthesis

摘要

PURPOSE: A display device using synthesis of lights is provided to obtain reduced manufacturing costs and size of a printed circuit board by displaying buttons selected by a user differently form the other buttons. CONSTITUTION: A plurality of key buttons are printed on a cover sheet(10). Two or more light emitting elements are installed at an interval on both lateral ends of a printed circuit board(20). A light guide plate(30) is inserted between the cover sheet and a touch printed circuit board and synthesizes the lights of the light emitting elements. A reflective sheet is attached to the backside of the light guide plate and reflects the lights of the light emitting elements toward the cover sheet. The light emitting elements are composed of LEDs which are inserted in holes of the light guide plate and emit different colors of lights.