Plasma display device
AssigneeLG Electronics Inc.
InventorsYoon Chang Choi, Byung Goo Kong, Dong Soo Lee, Seong Ho Kang
Life of this patent
Estimating the term…
Abstract
A plasma display device is provided. In the plasma display device, a plurality of scan electrodes are divided into one or more scan electrode groups, and different driving signals are applied to the scan electrode groups. More specifically, a minimum voltage detected during a set-down period of a reset period is made to be discrepant from a scan voltage, thereby reducing the amount by which wall charge is erased and stabilizing an address discharge. In addition, different driving signals are applied to a plurality of scan electrodes, and thus, it is possible to stabilize an address discharge even in scan electrodes to which a scan signal is applied late.
Claims20
A plasma display device comprising:
- a plasma display panel (PDP) which includes an upper substrate, a lower substrate, a plurality of scan electrodes and a plurality of sustain electrodes that are disposed on the upper substrate, and a plurality of address electrodes that are disposed on the lower substrate;
- and
- a driving unit which applies driving signals to the scan electrodes, the sustain electrodes and the address electrodes,
- wherein the scan electrodes are divided into a plurality of scan electrode groups including first and second scan electrode groups, a plurality of scan signals are applied to the scan electrodes in units of the scan electrode groups, at least one of a plurality of subfields of a frame comprises a reset period, an address period and a sustain period, the address period comprises a first sub-address period during which the scan signals are applied to the first scan electrode group and a second sub-address period during which the scan signals are applied to the first scan electrode group, a first scan bias voltage is applied to the second scan electrode group during the first sub-address period, a second scan bias voltage is applied to at least one of the scan electrode groups during the second sub-address period, the first and second scan bias voltages are different from each other, and a minimum voltage of a set-down signal which is applied to the second scan electrode group during the reset period and has a voltage that gradually decreases is higher than a scan voltage applied to the scan electrodes during the address period.
A method of driving a PDP which includes an upper substrate, a lower substrate, a plurality of scan electrodes and a plurality of sustain electrodes that are disposed on the upper substrate, and a plurality of address electrodes that are disposed on the lower substrate,
- wherein the scan electrodes are divided into a plurality of scan electrode groups including first and second scan electrode groups, a plurality of scan signals are applied to the scan electrodes in units of the scan electrode groups, at least one of a plurality of subfields of a frame comprises a reset period, an address period and a sustain period, the address period comprises a first sub-address period during which the scan signals are applied to the first scan electrode group and a second sub-address period during which the scan signals are applied to the first scan electrode group, a first scan bias voltage is applied to the second scan electrode group during the first sub-address period, a second scan bias voltage is applied to at least one of the scan electrode groups during the second sub-address period, the first and second scan bias voltages are different from each other, and a minimum voltage of a set-down signal which is applied to the second scan electrode group during the reset period and has a voltage that gradually decreases is higher than a scan voltage applied to the scan electrodes during the address period.
Dependencies are inferred from the claim text.