| Title: |
Plasma display device and method of driving PDP |
| Document Number: |
20070257864 |
| Publication Date: |
November 8, 2007 |
| Appl. No: |
11/797715 |
| Application Filed: |
May 07, 2007 |
| Abstract: |
A plasma display device and a method of driving a plasma display panel (PDP) are provided. The plasma display device includes an upper substrate on which a plurality of first electrodes and a plurality of second electrodes respectively corresponding to the first electrodes are formed; and a lower substrate on which a plurality of third electrodes are formed, wherein the first electrodes are respectively 100 μm or more distant apart from the second electrodes, and during a reset period, a voltage that gradually increases is applied to the first electrodes, and at the same time, a positive bias voltage is applied to the third electrodes. Therefore, it is possible to reduce the power consumption of a PDP by driving a PDP including a scan electrode and an address electrode that are sufficiently distant apart from each other in such a manner that a positive bias voltage can be applied to an address electrode during a reset period. In addition, it is possible to improve the luminance of a PDP and the quality of display of images by preventing a misdischarge such as a spot. Moreover, it is possible to prevent a panel driving circuit from malfunctioning and to improve the reliability of a panel driving circuit by applying a positive bias voltage to a plurality of address electrodes at at least two different times so that noise in driving signals can be reduced. |
| Inventors: |
Lee, Sun Hong (Kyungsangbuk-do, KR); Kim, Do Yoon (Kyungsangbuk-do, KR) |
| Claim: |
1. A plasma display device which is driven in a time-division manner by dividing each frame into a plurality of sub-fields, the plasma display device comprising: an upper substrate on which a plurality of first electrodes and a plurality of second electrodes respectively corresponding to the first electrodes are formed; and a lower substrate on which a plurality of third electrodes are formed, wherein the first electrodes are respectively 100 μm or more distant apart from the second electrodes, and during a reset period, a voltage that gradually increases is applied to the first electrodes, and at the same time, a positive bias voltage is applied to the third electrodes. |
| Claim: |
2. The plasma display device of claim 1, wherein each of the first and second electrodes comprises an indium tin oxide (ITO) electrode and a bus electrode, and the ITO electrodes of the first electrodes are respectively 100 μm or more distant apart from the ITO electrodes of the second electrodes. |
| Claim: |
3. The plasma display device of claim 1, wherein at least two of the third electrodes differ from each other in terms of when they are supplied with the positive bias voltage. |
| Claim: |
4. The plasma display device of claim 1, wherein the third electrodes are divided into one or more electrode groups, and the electrode groups differ from each other in terms of when they are supplied with the bias voltage. |
| Claim: |
5. The plasma display device of claim 4, wherein the electrode groups comprise first and second electrode groups, and an interval between when the first electrode group is supplied with the bias voltage and when the second electrode group is supplied with the bias voltage is 10 ns-1000 ns. |
| Claim: |
6. The plasma display device of claim 1, wherein, during a part of the plurality of sub-fields, a predetermined voltage that gradually increases is applied to the first electrodes and a bias voltage having the same polarity as the predetermined voltage is applied to the third electrodes. |
| Claim: |
7. The plasmas display device of claim 1, wherein, during a time period between when the bias voltage is applied and when a scan signal is applied, a stabilization signal having a positive voltage and/or a negative voltage is applied to the first electrodes. |
| Claim: |
8. The plasma display device of claim 1, wherein a pre-reset period for generating wall charges having opposite polarities in the first and second electrodes is followed by the first sub-field, a lowest voltage applied to the first electrodes during the pre-reset period is lower than a lowest voltage applied to the first electrodes during the reset period. |
| Claim: |
9. The plasma display device of claim 1, wherein, during a reset period, a negative voltage that gradually decreases is applied to the first electrodes, and at the same time, a first positive bias voltage is applied to the second electrodes, and during an address period, a second positive bias voltage is applied to the second electrodes, the first positive bias voltage being half of the second positive bias voltage. |
| Claim: |
10. The plasma display device of claim 9, further comprising a capacitor which collects energy from a plasma display panel (PDP) and stores the collected energy during a sustain period, wherein the first positive bias voltage applied to the second electrodes is generated using the energy stored in the capacitor. |
| Claim: |
11. A method of driving a PDP in a time-division manner by dividing each frame into a plurality of sub-fields, the PDP comprising an upper substrate on which a plurality of first electrodes and a plurality of second electrodes respectively corresponding to the first electrodes are formed and a lower substrate on which a plurality of third electrodes are formed, the first electrodes being respectively 100 μm or more distant apart from the second electrodes, and the method comprising: during a reset period, applying a voltage that gradually increases to the first electrodes, and at the same time, applying a positive bias voltage to the third electrodes. |
| Claim: |
12. The method of claim 11, wherein each of the first and second electrodes comprises an indium tin oxide (ITO) electrode and a bus electrode, and the ITO electrodes of the first electrodes are respectively 100 μm or more distant apart from the ITO electrodes of the second electrodes. |
| Claim: |
13. The method of claim 11, wherein at least two of the third electrodes differ from each other in terms of when they are supplied with the bias voltage. |
| Claim: |
14. The method of claim 11, wherein the third electrodes are divided into one or more electrode groups, and the electrode groups differ from each other in terms of when they are supplied with the bias voltage. |
| Claim: |
15. The method of claim 14, wherein the electrode groups comprise first and second electrode groups, and an interval between when the first electrode group is supplied with the bias voltage and when the second electrode group is supplied with the bias voltage is 10 ns-1000 ns. |
| Claim: |
16. The method of claim 11, wherein, during a part of the plurality of sub-fields, a predetermined voltage that gradually increases is applied to the first electrodes and a bias voltage having the same polarity as the predetermined voltage is applied to the third electrodes. |
| Claim: |
17. The method of claim 11, wherein, during a time period between when the bias voltage is applied and when a scan signal is applied, a stabilization signal having a positive voltage and/or a negative voltage is applied to the first electrodes. |
| Claim: |
18. The method of claim 11, wherein a pre-reset period for generating wall charges having opposite polarities in the first and second electrodes is followed by the first sub-field, a lowest voltage applied to the first electrodes during the pre-reset period is lower than a lowest voltage applied to the first electrodes during the reset period. |
| Claim: |
19. The method of claim 11, wherein, during a reset period, a negative voltage that gradually decreases is applied to the first electrodes, and at the same time, a first positive bias voltage is applied to the second electrodes, and during an address period, a second positive bias voltage is applied to the second electrodes, the first positive bias voltage being half of the second positive bias voltage. |
| Claim: |
20. The method of claim 19, wherein the first positive bias voltage applied to the second electrodes is generated using energy that is collected from the PDP and then stored in a capacitor during a sustain period. |
| Current U.S. Class: |
345/67 |
| Current International Class: |
09 |
| Accession Number: |
edspap.20070257864 |
| Database: |
USPTO Patent Applications |
