Transporting device for substrate of liquid crystal display and using method thereof

A transporting device for transporting substrate of liquid crystal display, comprising a fixing arm and at least two forks mounted on the fixing arm, wherein the transporting device further comprises laser emitting devices which are respectively mounted on the forks that carries two ends of the substrate, laser sensors which are mounted on the fixing arm and corresponding to the laser emitting devices, a processor which is mounted on the fixing arm and connected to the laser sensors and air damping devices which are mounted below the forks that carries two ends of the substrate respectively;

• when the fork carries the substrate, the laser sensor will receive the laser emitted from the laser emitting device, sense the displacement of the fork via the laser and generate a corresponding sensing signal;
• the processor will process the sensing signal acquired by the laser sensor, attain a first amplitude of the fork when it carries the substrate, and compare the first amplitude with a first preset threshold;
• the processor will control the air damping device to work to alleviate the vibration of the fork if the first amplitude is larger than the first threshold.