Multifunctional push button switch with an OLED display. This switch is able to change the display each time at the operation. While we put the most advanced OLED display in a frame slimmed to the minimum, we have developed a lens that has a unique shape. We realized the full screen without feeling the frame of the top face button. For a variety of display can be on the button's entire top surface, despite the compact screen, it can display a more impressive high-quality and richly expressive image.