Patent ID: 8242977

Claim:
A plasma display apparatus comprising: a plasma display panel which has a display region formed by a group of cells including a group of electrodes; and a circuit unit for driving and controlling the group of electrodes of the plasma display panel, wherein: in drive control of a field period corresponding to the display region of the plasma display panel, the field period has a plurality of sub fields divided in accordance with weighting of luminance for grayscale expression, and each sub field has periods and operations of reset, address, and sustain, as basic control, when a load ratio which is a ratio of lighting cells of the sub field is other than zero, drive in which the period and operation of the reset of the sub field are not thinned is carried out as first drive, and when the load ratio is zero, drive in which at least a part of the period and operation of the reset of the sub field is thinned is carried out as second drive, based on display data, an APL (average luminance level) value (k) of each field period is detected or calculated, and an APL variation value (q) which is a variation of the APL value (k) in a certain period including the field period is further calculated, and when the APL variation value (q) is less than a predetermined threshold value, even when the load ratio is changed from zero to a value other than zero between continuous sub fields in the field period, execution of the second drive is continued without starting execution of the first drive by giving higher priority than the basic control.