Plasma display panel driving method and plasma display device
AssigneePanasonic Corporation
InventorYutaka Yoshihama
Life of this patent
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Abstract
A plasma display panel driving method and a plasma display device capable of reducing initializing spots generated immediately after the start of driving the plasma display panel, and improving the quality of images to be displayed. A plurality of subfields, each including an initializing period, an address period, and a sustain period, are provided in one field. The one field includes at least one of the subfields in which a gently increasing ramp waveform voltage is applied to the scan electrodes in the initializing period thereof. The ramp waveform voltage to be applied to the scan electrodes for the first time after the start of driving the plasma display panel is generated so as to have a gentler slope than the other ramp waveform voltages have.
Claims10
A plasma display panel driving method, in which the plasma display panel includes a plurality of discharge cells, each of the discharge cells includes a display electrode pair and a data electrode, and the display electrode pair includes a scan electrode and a sustain electrode, the plasma display panel driving method including a plurality of fields, each field having a plurality of subfields, and at least one of the subfields having an initializing period, an address period, and a sustain period for applying voltage to the scan electrodes, the method comprising:
- applying a ramp waveform voltage in a first initializing period of a field in response to the plasma display panel being powered on;
- and
- applying other ramp waveform voltages in any initializing periods of other fields subsequent to the field,
- wherein the ramp waveform voltage has a slope that is less than a slope of the other ramp waveform voltages.
A plasma display device comprising:
- a plasma display panel including:
- a plurality of discharge cells, each of the discharge cells including a display electrode pair and a data electrode, the display electrode pair including a scan electrode and a sustain electrode;
- and
- wherein a plurality of subfields are provided in one field so that at least one of the subfields includes an initializing period, an address period, and a sustain period, and
- a scan electrode driving circuit is formed so that a slope of the ramp waveform voltage is changeable,
- wherein the scan electrode driving circuit applies a ramp waveform voltage in a first initializing period of a field in response to the plasma display panel being powered on;
- and
- applies other ramp waveform voltages in any initializing periods of other fields subsequent to the field,
- wherein the ramp waveform voltage has a slope that is less than a slope of the other ramp waveform voltages.
Dependencies are inferred from the claim text.