A liquid crystal display including a pair of substrates, with a liquid crystal sealed therebetween. The method includes reducing engine torque and, when the engine torque is less than or equal to a limit value, the synchronized upstream or downstream group is actuated to disengage the currant gear. By the aforesaid hybrid power-generating device, not only the overall performance and the stability of power grid are enhanced, but also the operating cost is reduced. The ozonated fluid is further electro chemically treated with DC current. Fluid flow is allowed through the catheter segment having the check valve therein, with flow only permitted from the proximal end and through the distal end for release into a collection reservoir.