Display method of plasma display apparatus and plasma display apparatus

A plasma display apparatus which carries out color display by letting phosphors for three primary colors emit light in accordance with input three primary color video signals, wherein, the plasma display apparatus includes:

• a detecting unit of detecting an average picture level of the three primary color video signals;
• a controlling unit of controlling a total number of sustain pulses to be applied to one frame in accordance with the average picture level detected;
• an adjusting unit of adjusting an output gray level so that a rate of change in a ratio of an output gray level with respect to an input gray level of a primary color video signal corresponding to a phosphor is smaller than a rate of change in a ratio of an output gray level with respect to an input gray level of a primary color video signal corresponding to other phosphors for two primary colors, the phosphor having the least decrease in an energy conversion efficiency as increase in the total number of sustain pulses when the total number of sustain pulses changes from a first value to a second value which is larger than the first value, among the phosphors for three primary colors;
• and
• a driving unit of driving a plasma display panel by a subfield method in accordance with the output gray level of the three primary color video signals adjusted.