Abstract: A keyboard includes an elastic element disposed above a bottom case, a light emitter, a light receiver, a pressing element, and a keycap. When a force toward the bottom case is applied to a top surface of the elastic element, a relationship between a force to move the top surface and a distance from the top surface to the bottom case is in a negative correlation in a path of the top surface from a first position to a second position, and a relationship between a force to move the top surface and a distance from the top surface to the bottom case is in a positive correlation in a path of the top surface from the second position to a third position. The light emitter, the light receiver, and the pressing element are disposed above the elastic element. The keycap is disposed above the pressing element.

Abstract: A keyboard includes an elastic element disposed above a bottom case, a light emitter, a light receiver, a pressing element, and a keycap. When a force toward the bottom case is applied to a top surface of the elastic element, a relationship between a force to move the top surface and a distance from the top surface to the bottom case is in a negative correlation in a path of the top surface from a first position to a second position, and a relationship between a force to move the top surface and a distance from the top surface to the bottom case is in a positive correlation in a path of the top surface from the second position to a third position. The light emitter, the light receiver, and the pressing element are disposed above the elastic element. The keycap is disposed above the pressing element.

Abstract: A keyboard device is applied to an electronic apparatus and includes a main body, a connection base, a first tilt sensor, a second tilt sensor, and a processor. The connection base is rotatably connected to the main body and configured to detachably be engaged to the electronic apparatus. The first tilt sensor is disposed on the main body and configured to generate first tilt data. The second tilt sensor is disposed on the connection base and configured to generate second tilt data. The processor is electrically connected to the first tilt sensor and the second tilt sensor, and is configured to calculate angle difference data according to the first tilt data and the second tilt data.

Abstract: A keyboard device is applied to an electronic apparatus and includes a main body, a connection base, a first tilt sensor, a second tilt sensor, and a processor. The connection base is rotatably connected to the main body and configured to detachably be engaged to the electronic apparatus. The first tilt sensor is disposed on the main body and configured to generate first tilt data. The second tilt sensor is disposed on the connection base and configured to generate second tilt data. The processor is electrically connected to the first tilt sensor and the second tilt sensor, and is configured to calculate angle difference data according to the first tilt data and the second tilt data.