Plasma display apparatus

Abstract

A plasma display apparatus is disclosed. The plasma display apparatus includes a plasma display panel comprising a scan electrode, and a scan driver for supplying a driving signal to the scan electrode in a first subfield and a second subfield. The duration of a first period ranging from a supply start time point of a scan reference voltage to a supply start time point of a scan signal in the first subfield is different from the duration of a second period ranging from a supply start time point of a scan reference voltage to a supply start time point of a scan signal in the second subfield.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The embodiment of the invention will be described in detail with reference to the following drawings in which like numerals refer to like elements.

FIG. 1 illustrates a plasma display apparatus according to a first embodiment of the present invention;

FIG. 2 a illustrates a plasma display panel of the plasma display apparatus according to the embodiment of the first present invention;

FIG. 2 b is a diagram for enlarging a portion indicated by a reference symbol A of FIG. 2a;

FIG. 3 illustrates a frame used to represent gray scale of an image in the plasma display apparatus according to the first embodiment of the present invention;

FIG. 4 illustrates an operation of a driver of the plasma display apparatus according to the first embodiment of the present invention in one subfield;

FIG. 5 illustrates an example of a change in the duration of a period, which ranges from a supply start time point of a scan reference voltage to a supply start time point of a scan signal, in the plasma display apparatus according to the first embodiment of the present invention;

FIGS. 6 a to 6h illustrate an another example of a change in the duration of a period, which ranges from a supply start time point of a scan reference voltage to a supply start time point of a scan signal, in the plasma display apparatus according to the first embodiment of the present invention;

FIG. 7 illustrates a change in the duration of a period ranging from a supply start time point of a scan reference voltage to a supply start time point of a scan signal, depending on a temperature of a plasma display panel in a plasma display apparatus according to a second embodiment of the present invention;

FIG. 8 illustrates a reason to reduce the duration of a period ranging from a supply start time point of a scan reference voltage to a supply start time point of a scan signal when the temperature of the plasma display panel is relatively high;

FIG. 9 illustrates a change in the duration of a period ranging from a supply start time point of a scan reference voltage to a supply start time point of a scan signal depending on the temperature of the plasma display panel; and

FIG. 10 illustrates the duration of a period ranging from a supply start time point of a scan reference voltage to a supply start time point of a scan signal depending on a highest level voltage of a setup signal in a plasma display apparatus according to a third embodiment of the present invention.

Claims

1. A plasma display apparatus comprising: a plasma display panel comprising a scan electrode; anda scan driver for supplying a driving signal to the scan electrode in a first subfield and a second subfield,wherein the duration of a first period ranging from a supply start time point of a scan reference voltage to a supply start time point of a scan signal in the first subfield is different from the duration of a second period ranging from a supply start time point of a scan reference voltage to a supply start time point of a scan signal in the second subfield.

2. The plasma display apparatus of claim 1, wherein the changes in the duration of the first period and the second period range from about 1 μs to about 50 μs during the period when the scan signal is first supplied to a scan electrode, and wherein the scan electrode is one of a plurality of scan electrodes.

3. The plasma display apparatus of claim 2, wherein the changes in the duration of the first period and the second period range from about 5 μs to about 15 μs during the period when the scan signal is first supplied to a scan electrode, and wherein the scan electrode is one of a plurality of scan electrodes.

4. The plasma display apparatus of claim 1, wherein a difference between the duration of the first period and the duration of the second period ranges from about 1 μs to about 50 μs.

5. The plasma display apparatus of claim 4, wherein a difference between the duration of the first period and the duration of the second period ranges from about 10 μs to about 30 μs.

6. The plasma display apparatus of claim 5, wherein a difference between the duration of the first period and the duration of the second period ranges from about 15 μs to about 25 μs.

7. The plasma display apparatus of claim 1, wherein the duration of the first period and the duration of the second period are inversely proportional to the duration of a falling period of a set-down signal.

8. The plasma display apparatus of claim 1, wherein the duration of the first period and the duration of the second period are inversely proportional to a lowest level voltage of a set-down signal.

9. The plasma display apparatus of claim 1, wherein the duration of the first period and the duration of the second period are inversely proportional to the duration of a maintenance period of a voltage at a supply end time point of a set-down signal.

10. The plasma display apparatus of claim 1, wherein the duration of the first period and the duration of the second period are inversely proportional to the duration of a maintenance period of a voltage at a supply start time point of a set-down signal.

11. The plasma display apparatus of claim 1, wherein the duration of the first period and the duration of the second period are inversely proportional to the duration of a rising period of a setup signal.

12. The plasma display apparatus of claim 1, wherein the duration of the first period and the duration of the second period are inversely proportional to the duration of a maintenance period of a voltage at a supply end time point of a setup signal.

13. The plasma display apparatus of claim 1, wherein the duration of the first period and the duration of the second period are inversely proportional to the duration of a maintenance period of a voltage at a supply start time point of a setup signal.

14. A plasma display apparatus comprising: a plasma display panel comprising a scan electrode; anda scan driver for supplying a driving signal to the scan electrode in a first subfield and a second subfield,wherein the duration of a first period ranging from a supply start time point of a scan reference voltage to a supply start time point of a scan signal in the first subfield at a first temperature is different from the duration of a second period ranging from a supply start time point of a scan reference voltage to a supply start time point of a scan signal in the second subfield at a second temperature.

15. The plasma display apparatus of claim 14, wherein when the second temperature is more than the first temperature, the duration of the second period is less than the duration of the first period.

16. The plasma display apparatus of claim 14, wherein the first temperature and the second temperature comprise either an internal temperature of the plasma display panel or an ambient temperature of the plasma display panel.

17. A plasma display apparatus comprising: a plasma display panel comprising a scan electrode; anda scan driver for supplying a driving signal to the scan electrode in a first subfield and a second subfield,wherein the duration of a first period ranging from a supply start time point of a scan reference voltage to a supply start time point of a scan signal in the first subfield is different from the duration of a second period ranging from a supply start time point of a scan reference voltage to a supply start time point of a scan signal in the second subfield, andwherein the duration of the first period and the duration of the second period depend on a highest level voltage of a setup signal.

18. The plasma display apparatus of claim 17, wherein when a highest level voltage of a setup signal in the second subfield is less than a highest level voltage of a setup signal in the first subfield, the duration of the second period is less than the duration of the first period.

19. A plasma display apparatus comprising: a plasma display panel comprising a scan electrode; anda scan driver for supplying a driving signal to the scan electrode in a first subfield and a second subfield,wherein the duration of a first period ranging from a supply end time point of a set-down signal to a supply start time point of a scan signal in the first subfield is different from the duration of a second period ranging from a supply end time point of a set-down signal to a supply start time point of a scan signal in the second subfield.

20. The plasma display apparatus of claim 19, wherein when a temperature of the plasma display panel in the second subfield is more than a temperature of the plasma display panel in the first subfield, the duration of the second period is less than the duration of the first period.