A plasma display driving method and apparatus that can reduce the occurrences of dropout, on a displayed image, caused by misaddress when the environment temperature becomes low. The locking mechanism is designed to be carried by the frame of the locker, and is particularly suited to enable the locker to be used as an evidence locker or similar restricted access storage compartment. An encoder converts the digital data into audio tones that synthesize frequency characteristics of human speech. Therefore, the structure of the LED lamp is simplified. A logarithm of volume resistivity of the intermediate transfer member is 10.