OPTICAL MOUSE AND ITS LIFTED STATE DETERMINING METHOD

The present invention relates to an optical mouse and its lifting state determining method. A first light signal and a second light signal of different magnitudes are emitted during the light-emitting period of the optical mouse. Corresponding to the first optical signal, the first reflected image is received. Corresponding to the second optical signal, the second reflected image is received. Comparing the illuminance reference values of the first and second reflected images to obtain a comparison result, and use the comparison result to determine whether the optical mouse is in a lifted state. Since the magnitude of the first optical signal and the second optical signal are different, it can be preset that the illuminance reference values of the received first and second reflected images are significantly different. If there is no significant difference in the comparison results, it can be clearly judged as a lifted state. Therefore, the accuracy of determining the lifted state of the optical mouse is effect