Patent ID: 7423613

Claim:
An apparatus to automatically control power of address data in a plasma display panel including a plurality of address electrodes, a plurality of scan electrodes, and a plurality of sustain electrodes arranged in pairs with the scan electrodes, comprising: a memory to store sustain discharge information corresponding to a load ratio; an average signal level sensor to measure a load ratio of an externally-inputted image signal; a power controller to output sustain discharge information corresponding to a load ratio of currently-inputted data; an address power controller to calculate a sum of pixel value differences between adjacent ones of successive lines in the image signal, to determine a start gain, an end gain, and a sustain time, based on the calculated line pixel value difference sum, and to repeatedly output a gain initially corresponding to the start gain and sequentially decremented by a predetermined value from the start gain until the gain corresponds to the end gain; and an address data generator to multiply the image signal by respective gains outputted from said address power controller, and to generate address data.