Control device

A control device, comprising:

• a display panel;
• and
• a key structure located over the display panel, wherein the key structure comprises:
• a keycap made of a light-transmissible material, wherein the keycap comprises a press surface, a wall part and a pedestal, wherein the pedestal is horizontally and externally protruded from the wall part, and the pedestal comprises a top surface;
• an elastic element comprising a support part, a lateral wall, a lower part and an opening, wherein the support part is connected with the keycap, the lateral wall is arranged between the support part and the lower part, and the support part and the lateral wall are arranged around the opening of the elastic element;
• a conducting element disposed on the top surface of the pedestal and the support part;
• and
• a circuit board located over the elastic element, and comprising a top surface, a circuit structure, an opening and a bottom surface, wherein the circuit structure is installed on the bottom surface of the circuit board and arranged around the opening of the circuit board, the circuit structure comprises a first circuit pattern and a second circuit pattern, and the first circuit pattern and the second circuit pattern are separated from each other by a gap,
• wherein when the keycap is not pressed down, the conducting element is contacted with the first circuit pattern and the second circuit pattern, so that the first circuit pattern and the second circuit pattern are electrically connected with each other, wherein when the keycap is pressed down, the conducting element is detached from the first circuit pattern and the second circuit pattern, so that the first circuit pattern and the second circuit pattern are not electrically connected with each other.