Method for driving plasma display panel
View Patent ↗A method of driving a PDP including alternately-arranged X and Y electrodes and A electrodes crossing the X and Y electrodes provides a recurring cycle of a resetting period, an addressing period, and a sustaining period. The method includes applying a ramp waveform in the resetting period. Discharge starting threshold voltages between the X and Y electrodes and between the A and Y electrodes are denoted by V tXY and V tAY , respectively. Voltages applied between the X and Y electrodes and between the A and Y electrodes at the trailing edge of the ramp waveform are denoted by V XY and V AY , respectively. An offset voltage of the voltage applied between the A and Y electrodes at the end of the sustaining period is denoted by V aoff . In such a case, the voltage of a driving waveform for each electrode is set so as to satisfy the relational expression “2 V tAY −V tXY >2V AY −V XY −2V aoff ”.
1. A method of driving a plasma display panel including a plurality of X electrodes and a plurality of Y electrodes arranged in alternating, spaced relationship on a base plate, and a plurality of address electrodes spaced from and crossing the X and Y electrodes, comprising:
generating initializing discharges with at least one ramp waveform voltage applied between the X electrodes and Y electrodes during an initializing period;
generating addressing discharges between the Y electrodes and the address electrodes during an addressing period; and
generating sustaining discharges between the X electrodes and Y electrodes during a sustaining period, said initializing period, said addressing period and said sustaining period cyclically recurring,
wherein the voltage of a driving waveform for each electrode satisfies the following relational expression:
2 V tAY −V tXY ≦2 V AY −V XY −2 V aoff ,
wherein V tAY denotes a discharge starting threshold voltage between the address electrodes and the Y electrodes, and V tXY denotes a discharge starting threshold voltage between the X electrodes and the Y electrodes, when the V electrodes serve as cathodes,
wherein V AY denotes a voltage applied between the address electrodes and the Y electrodes, and V XY denotes a voltage applied between the X electrodes and the Y electrodes, at the trailing edge of the ramp waveform at the end of the initializing period, and
wherein V aoff denotes an offset voltage of the voltage applied between the address electrodes and the Y electrodes at the end of the sustaining period.
2. The method of driving a plasma display panel according to claim 1 , wherein, when a driving waveform having two or more types of offset voltages V aoff is used in the sustaining period, the plasma display panel is driven by setting the voltage of the driving waveform so as to satisfy the relational expression at the end of the sustaining period.
3. The method of driving a plasma display panel according to claim 1 , wherein, when a driving waveform having an alternating voltage with two or more types of amplitudes is used as a driving waveform to be applied between the address electrodes and the Y electrodes in the sustaining period, the plasma display panel is driven by setting the voltage of the driving waveform so as to satisfy the relational expression at the end of the sustaining period.
4. The method of driving a plasma display panel according to claim 1 , wherein, when the address electrodes serve as a cathode, V tXY denotes a discharge starting threshold voltage between the X electrodes and the address electrodes, and V tYA denotes a discharge starting threshold voltage between the Y eleofrodes and the address electrodes,
when the X electrodes serve as a cathode, V tAX denotes a discharge starting threshold voltage between the address electrodes and the X electrodes, and V tYX denotes a discharge starting threshold voltage between the V electrodes and the X electrodes, and
the plasma display panel satisfies the following relational expression:
V tAY +V tXA −V tXY >0 or
V tYA +V tAX −V tYX >0.
5. A method of driving a plasma display panel including a plurality of X electrodes and a plurality of Y electrodes arranged in alternating, spaced relationship on a base plate and a plurality of address electrodes spaced from and crossing the X and Y electrodes, comprising:
generating initializing discharges with at least one ramp waveform voltage applied between the X electrodes and Y electrodes during an initializing period;
generating addressing discharges between the Y electrodes and the address electrodes during an addressing period; and
generating sustaining discharges between the X electrodes and the Y electrodes during a sustaining period, said initializing period, said addressing period and said sustaining period cyclically recurring,
wherein the voltage of a driving waveform for each electrode satisfies the following relational expression:
2 V tAY −V tXY ≦2 V AY −V XY −2 V aoff
wherein V tAY denotes a discharge starting threshold voltage between the address electrodes and the Y electrodes, and V tXV denotes a discharge starting threshold voltage between the X electrodes and the Y electrodes when the Y electrodes serve as cathodes,
wherein V AY denotes a voltage applied between the address electrodes and the Y electrodes, and V XY denotes a voltage applied between the X electrodes and the Y electrodes at the trailing edge of the ramp waveform at the end of the initializing period,
wherein V aoff denotes an offset voltage of the voltage applied between the address electrodes and the Y electrodes at the end of sustaining period, and
wherein during the at least one ramp waveform voltage applied to the Y electrode during an initializing period, a voltage opposite to the ramp waveform, voltage is applied on the X electrode and which is not applied to the ramp waveform.