Provided are an apparatus, method, and medium for processing an image. More particularly, the invention encompasses a method and an apparatus for quickly and securely lifting panels. The method additionally includes forming a passivation layer over the metallization layer. If the floating voltage is greater than the preset voltage of the comparison circuit, the alarm signal outputted by the signal generator indicates that the DC motor is operating abnormally. The couplings between links can be switched between fixed and free rotational states by passing them through a path with converging walls that depress the movable link plates.