INPUT DEVICE, INPUT METHOD AND KEYBOARD

The application provides an input device. The input device comprises a key module, a capacitance detection module and a control module, wherein the key module receives a physical pressing signal and accordingly feeds back a capacitance change signal; the capacitance detection module receives the capacitance change signal from the key module and judges a working state of the key module; the control module receives a judgment result from the capacitance detection module and correspondingly generates an input signal. The key module comprises a key switch and a capacitor circuit which are arranged in series. The key module accordingly adjusts the change of the capacitance value of the key module in response to the external physical pressing signal. With the key module of the present application, the sensitivity of judging the working state of the key module is improved by connecting the capacitor circuit in series. Therefore, the requirement on assembly precision of the key switch is reduced, and the product installation difficulty is reduced. Meanwhile, the present application also provides an input method and a keyboard adopting the input device.