Method of Driving Plasma Display Panel
A driving method of a plasma display panel with discharge cells formed at intersections of scanning electrodes SC 1 through SCn and sustaining electrodes SU 1 through SUn with data electrodes D 1 through Dm includes setting a voltage applied to sustaining electrodes SU 1 through SUn in a writing period of a sub-field whose brightness weight is lowest of a plurality of sub-fields to be higher than a voltage applied to sustaining electrodes SU 1 through SUn in a writing period of other sub-fields, and, when whether each of the sub-fields emit or not emit light is controlled to display a desired gradation at a discharge cell, letting a discharge cell that displays a gradation higher than a first threshold value emit even in a sub-field whose brightness weight is lowest.
1 . A driving method of a plasma display panel with a discharge cell at an intersection of a scanning electrode and a sustaining electrode with a data electrode, comprising:
with one field period constituted of a plurality of sub-fields with a writing period and a sustaining period,
selectively generating writing discharge in the discharge cell in the writing period,
generating sustaining discharge for letting a discharge cell where the writing discharge was caused emit light at a predetermined brightness weight in the sustaining period;
setting a voltage that is applied to the sustaining electrode in a writing period of a sub-field lowest in the brightness weight of the plurality of sub-fields to be higher than a voltage applied to the sustaining electrode in a writing period of sub-fields other than the above sub-field; and
comparing a first threshold value of a predetermined gradation and a gradation of each of the discharge cells to control when whether each of sub-fields emit or not emit light is controlled to display a predetermined gradation at the discharge cell so that a discharge cell that displays a gradation higher than the first threshold value emits even in a sub-field lowest in the brightness weight.
2 . The driving method of a plasma display panel of claim 1 , wherein a discharge cell that displays a gradation higher than a second threshold value being higher than the first threshold value is controlled so as to emit light even in sub-fields lowest and next to the lowest in the brightness weight.