[Invisible Tile Switch] is my college work, designed in 2008. As a person with obsessive-compulsive disorder, the pursuit is rules, tidiness, and order, just like the neatly arranged tiles in the bathroom will make people comfortable, but how can the switch destroy the beauty of such order? Therefore, I designed this invisible ceramic tile switch. The appearance of the switch is the same as that of a ceramic tile. It is hidden among many ceramic tiles. There is a cold LED indicator inside. When the bathroom is dim, you can see where the switch is. When the press lights up the room, the indicator light is not visible, and the wall surface is restored to a neat order.