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US 8,390,608 B2Granted
Plasma display apparatus
AssigneeLG Electronics Inc.
InventorsDong Hyun Park, Seok Ho Kim, Young Seop Moon, Hyung Jae Kim
Life of this patent
Estimating the term…
Abstract
A plasma display apparatus according to the present invention efficiently accumulates charges in respective electrodes, using a driving signal supplied in a second set-down period, to prevent a flickering erroneous discharge caused by deficiency of wall charges. As a result, the plasma display apparatus can improve picture quality of a display image.
Claims20
A plasma display apparatus, comprising a plurality of scan electrodes and sustain electrodes;
- and
- one or more drivers configured to supply signals to the plurality of scan electrodes and sustain electrodes, wherein the signals correspond to a frame that includes a plurality of subfields,
- wherein the plurality of scan electrodes are divided into two or more groups including first and second groups,
- wherein at least one of the plurality of subfields sequentially comprises:
- a first scan period during which the one or more drivers are configured to supply a scan signal to the first group;
- a first sustain period during which the one or more drivers are configured to supply a signal having a voltage of positive polarity to the first and second groups;
- a second set-down period during which the one or more drivers are configured to gradually reduce the voltage of the first group and to supply a voltage of negative polarity to the second group;
- and
- a second scan period during which the one or more drivers are configured to supply a scan signal to the second group, and
- wherein an absolute value of a sustain bias voltage of positive polarity supplied to the sustain electrodes is larger than an absolute value of the lowest voltage of the first group in the second set-down period, as claimed (emphasis added).
7 more elements
A plasma display apparatus, comprising a plurality of scan electrodes and sustain electrodes;
- and
- one or more drivers configured to supply signals to the plurality of scan electrodes and sustain electrodes, wherein the signals correspond to a frame that includes a plurality of subfields,
- wherein the plurality of scan electrodes are divided into two or more groups including first and second groups,
- wherein at least one of the plurality of subfields sequentially comprises:
- a first scan period during which the one or more drivers are configured to supply a scan signal to the first group;
- a second set-down period during which the one or more drivers are configured to supply a voltage gradually falling from a second voltage of positive polarity to the first group and a voltage of negative polarity to the second group;
- and
- a second scan period during which the one or more drivers are configured to supply a scan signal to the second group, as claimed (emphasis added).
5 more elements
A plasma display apparatus, comprising a plurality of scan electrodes and sustain electrodes;
- and
- one or more drivers configured to supply signals to the plurality of scan electrodes and sustain electrodes, wherein the signals correspond to a frame that includes a plurality of subfields,
- wherein the plurality of scan electrodes are divided into two or more groups including first and second groups,
- wherein at least one of the plurality of subfields sequentially comprises:
- a first scan period during which the one or more drivers are configured to supply a scan signal to the first group;
- a first sustain period during which the one or more drivers are configured to supply a sustain signal having a size of a first voltage of positive polarity to the first and second groups;
- a second set-down period during which the one or more drivers are configured to supply a voltage gradually falling from a second voltage of positive polarity to the first group and a voltage of negative polarity to the second group;
- and
- a second scan period during which a scan signal is supplied to the second group, as claimed (emphasis added).
6 more elements
Dependencies are inferred from the claim text.