Key structure

A key structure, comprising:

• a pedestal comprising a first pedestal opening;
• an upper cover having an upper cover opening, wherein the pedestal is covered by the upper cover;
• a first light-emitting element located under the pedestal, and emitting a first light beam, wherein the first light beam passes through the first pedestal opening;
• a triggering element arranged between the pedestal and the upper cover, wherein when the triggering element is depressed, the triggering element is moved relative to the pedestal, wherein the triggering element comprises a reflecting part, and the first light beam is reflected by the reflecting part;
• an array-type sensing element located under the pedestal, and aligned with the first pedestal opening, wherein after the first light beam reflected by the reflecting part is received by the array-type sensing element, the array-type sensing element generates plural images, wherein the array-type sensing element comprises plural micro sensors that are arranged in an array;
• and
• a control unit electrically connected with the array-type sensing element, wherein the control unit generates a corresponding pressure sensing signal according to the plural images.