Patent Grant
7800306
This Nonprovisional application claims priority under 35 U.S.C. §119(a) on Patent Application No. 10-2005-0009282 filed in Korea on Feb. 1, 2005 the entire contents of which are hereby incorporated by reference.
1. Field of the Invention
The present invention relates to a plasma display panel.
2. Background of the Related Art
A variety of flat display apparatuses, that have reduced the apparatus weight and volume, i.e., the disadvantages of a cathode ray tube, have been developed. These flat display apparatuses include a Liquid Crystal Display (LCD), a plasma display panel, a Field Emission Display (FED), Electro-Luminescence (EL) and the like. The plasma display panel is a display device that employs a gas discharge method, and can be easily manufactured in a large size and can display images of high luminance.
Referring to
On the lower substrate 18 having formed the address electrode 12X thereon is formed a lower dielectric layer 22 for accumulating wall charges thereon. Barrier ribs 24 are formed on the lower dielectric layer 22. Phosphor 20 is coated on the surfaces of the lower dielectric layer 22 and the barrier ribs 24.
The barrier ribs 24 function to prevent ultraviolet rays generated by a discharge and a visible ray from leaking to neighboring discharge cells. The phosphor 20 is excited with ultraviolet rays generated by a gas discharge and generates any one visible ray of red, green or blue. An inert gas for gas discharge is injected into a discharge space formed by the upper substrate 10, the lower substrate 18 and the barrier ribs 24.
Each of the scan electrode 12Y and the sustain electrode 12Z formed on the upper substrate 10 has a transparent electrode 12a and a bus electrode 12b, and intersects the address electrode 12X.
Each of the transparent electrodes 12a is formed of a transparent conductive material to allow light supplied from the discharge cell to pass through. A bus electrode 12b is formed of a metal material having a low resistance.
An upper dielectric layer 14 and a protection film 16 are sequentially formed on the upper substrate 10 on which the scan electrode 12Y and the sustain electrode 12Z are formed. Wall charges generated during a discharge are accumulated on the upper dielectric layer 14.
The protection film 16 functions to prevent damage to the upper dielectric layer 14 due to sputtering generated during the discharge of plasma and also to enhance emission efficiency of secondary electrons. The protection film 16 is generally formed using Magnesium Oxide (MgO).
In the related art plasma display panel, after a discharge cell is selected by a counter discharge between the address electrode 12X and the scan electrode 12Y, a discharge is sustained by a surface discharge between the scan electrode 12Y and the sustain electrode 12Z. The phosphor 20 radiates a visible ray with ultraviolet rays generated when the discharge is sustained in the discharge cell. Gray levels can be implemented by controlling a period where a discharge is sustained in the discharge cell.
In the related art, however, there is a problem where a discharge is not generated even though a driving voltage is applied to discharge cells located in corner regions of the plasma display panel. That is, in an exhaust process of exhausting air and/or impurities (e.g., particles of MgO) within the discharge space toward the outside, or an injection process of injecting an inert gas, a foreign substance is adhered on the surfaces of the scan electrode 12Y and the sustain electrode 12Z of the discharge cell. A foreign substance remaining on the surfaces of the scan electrode 12Y and the sustain electrode 12Z hinders a plasma discharge. As a result, the foreign substance causes a problem in that a discharge is not generated even though a driving voltage is applied to a discharge cell.
Accordingly, an object of the present invention is to solve at least the problems and disadvantages of the background art.
It is an object of the present invention to provide a plasma display panel that can prevent a phenomenon in which a discharge is not generated due to impurities.
A plasma display panel according to an aspect of the present invention comprises a substrate comprising a first region and a second region, and a plurality of scan electrode and sustain electrode pairs formed on the first region and on the second region, wherein a first gap between a scan electrode and a sustain electrode of a pair on the first region is different from a second gap between a scan electrode and a sustain electrode of a pair on the second region.
A plasma display panel according to another aspect of the present invention comprises a substrate comprising a first region and a second region, and a plurality of scan electrode and a sustain electrode pairs on the first region and on the second region, wherein a first gap between a scan electrode and a sustain electrode of a pair on the first region is different from a second gap between a scan electrode and a sustain electrode of a pair on the second region, and at least one of a gas inlet and a gas outlet is disposed in the second region.
The first region and the second region may be located between a center of the substrate and a sealing material formed on the substrate. The first gap formed on the first region may be wider than the second gap formed on the second region.
The scan electrode on the first region and the second region may be a scan bus electrode. The sustain electrode on the first region and the second region may be a sustain bus electrode.
The scan electrode on the first region and the second region may be a scan transparent electrode. The sustain electrode on the first region and the second region may be a sustain transparent electrode.
The difference of the first gap and the second gap may be 2 μm or more to 5 μm or less.
The first gap may be 60 μm or more to 65 μm or less. The second gap may be 55 μm or more to 63 μm or less.
The difference between the first gap and the second gap may be 2 μm or more to 5 μm or less.
The first gap may be 60 μm or more to 65 μm or less. The second gap may be 55 μm or more to 63 μm or less.
A region between the sealing material and the center of the substrate may comprise one or more corner regions. The second region may be at least one of the one or more corner regions.
The corner region comprised of the second region may comprise 5 horizontal pixels by 5 vertical pixels from a vertex of the corner.
At least one of the gas inlet and the gas outlet may be disposed in the corner region comprising 5 horizontal pixels by 5 vertical pixels from the vertex.
As described above, in the plasma display panel according to the present invention, inter-electrode gaps of discharge cells on which impurities remain, of discharge cells formed on a display region on which images are displayed, are formed to be different from one another. Therefore, there is an advantage in that a phenomenon in which a discharge is not generated even if a driving voltage is applied is prevented.
The invention will be described in detail with reference to the following drawings in which like numerals refer to like elements.
Preferred embodiments of the present invention will be described in a more detailed manner with reference to the drawings.
A plasma display panel according to an aspect of the present invention comprises a substrate comprising a first region and a second region, and a plurality of scan electrode and sustain electrode pairs formed on the first region and on the second region, wherein a first gap between a scan electrode and a sustain electrode of a pair on the first region is different from a second gap between a scan electrode and a sustain electrode of a pair on the second region.
The first region and the second region may be located between a center of the substrate and a sealing material formed on the substrate. The first gap formed on the first region may be wider than the second gap formed on the second region.
The scan electrode on the first region and the second region may be a scan bus electrode. The sustain electrode on the first region and the second region may be a sustain bus electrode.
The scan electrode on the first region and the second region may be a scan transparent electrode. The sustain electrode on the first region and the second region may be a sustain transparent electrode.
The difference of the first gap and the second gap may be 2 μm or more to 5 μm or less.
The first gap may be 60 μm or more to 65 μm or less. The second gap may be 55 μm or more to 63 μm or less.
The difference between the first gap and the second gap may be 2 μm or more to 5 μm or less.
The first gap may be 60 μm or more to 65 μm or less. The second gap may be 55 μm or more to 63 μm or less.
A region between the sealing material and the center of the substrate may comprise one or more corner regions. The second region may be at least one of the one or more corner regions.
The corner region comprised of the second region may comprise 5 horizontal pixels by 5 vertical pixels from a vertex of the corner.
A plasma display panel according to another aspect of the present invention comprises a substrate comprising a first region and a second region, and a plurality of scan electrode and a sustain electrode pairs on the first region and on the second region, wherein a first gap between a scan electrode and a sustain electrode of a pair on the first region is different from a second gap between a scan electrode and a sustain electrode of a pair on the second region, and at least one of a gas inlet and a gas outlet is disposed in the second region.
The first region and the second region may be located between a center of the substrate and a sealing material formed on the substrate. The first gap formed on the first region may be wider than the second gap formed on the second region.
The scan electrode and the sustain electrode on the first region and the second region may be a bus electrode.
The scan electrode and the sustain electrode on the first region and the second region may be a transparent electrode.
The difference of the first gap and the second gap may be 2 μm or more to 5 μm or less.
The first gap may be 60 μm or more to 65 μm or less, and the second gap may be 55 μm or more to 63 μm or less.
The difference of the first gap and the second gap may be 2 μm or more to 5 μm or less.
The first gap may be 60 μm or more to 65 μm or less, and the second gap may be 55 μm or more to 63 μm or less.
A region between the sealing material and the center of the substrate may comprise one or more corner regions. The second region is at least one of the one or more corner regions.
The corner region comprised of the second region may comprise 5 horizontal pixels by 5 vertical pixels from a vertex of the corner.
At least one of the gas inlet and the gas outlet may be disposed in the corner region comprising 5 horizontal pixels by 5 vertical pixels from the vertex.
Detailed embodiments of the present invention will now be described with reference to the accompanying drawings.
An outlet 305 for exhausting the air and/or impurities existing in the discharge space, and an inlet 307 for injecting the inert gas are formed in the rear substrate 303. The outlet 305 or the inlet 307 is formed in one or more second regions located between the center of the plasma display-panel according to first and second embodiments of the present invention and the sealant 310. In the first and second embodiments of the present invention, one or more second regions comprise one or more corner regions (B) between the center of the plasma display panel 300 and the sealant 310. The outlet 305 and the inlet 307 can be formed in one corner region (B) at the same time. If the outlet 305 is formed in one corner region (B), the inlet 307 can be formed in the other corner region (B).
In the case where dummy cells exist around the sealant 310, the corner regions (B) may not be included in a region where the dummy cells are formed.
An inter-electrode gap formed by a scan electrode and sustain electrode pair formed in the second regions (B) where the outlet 305 or the inlet 307 is formed, and an inter-electrode gap formed by a scan electrode and sustain electrode pair formed in a first region (A) where the outlet 305 or the inlet 307 is not formed are different from each other. This will be described with reference to
As shown in
As shown in
The second gap (y) can be formed to be 2 μm to 5 μm smaller than the first gap (x). Furthermore, the first gap (x) can range from 60 μm to 65 μm and the second gap (y) can range from 55 μm to 63 μm.
The second gap (y) between the scan electrode and the sustain electrode formed in the corner region (B) of the second region is smaller than the first gap (x) between the scan electrode and the sustain electrode formed in the first region (A). Therefore, a phenomenon in which a discharge is not generated is prevented even if a foreign substance is adhered on the surfaces of the scan electrode and the sustain electrode formed in the corner region (B).
In
As shown in
As shown in
The second gap (y) can be formed to be 2 μm to 5 μm smaller than the first gap (x). Furthermore, the first gap (x) can range from 60 μm to 65 μm and the second gap (y) can range from 55 μm to 63 μm.
The second gap (y) between the scan electrode and the sustain electrode formed in the corner region (B) of the second region is smaller than the first gap (x) between the scan electrode and the sustain electrode formed in the first region (A). Therefore, a phenomenon in which a discharge is not generated is prevented even if a foreign substance adheres on the surfaces of the scan electrode and the sustain electrode formed in the corner region (B).
In
That is, there is a high possibility that the three discharge cells from the left or right end on the corner region (B) and ten or fifteen discharge cells from the top or bottom on the corner region (B) may not be turned on.
The embodiment of the invention being thus described may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2005-0009282 | Feb 2005 | KR | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 6236159 | Inoue et al. | May 2001 | B1 |
| 6515419 | Lee et al. | Feb 2003 | B1 |
| 6548962 | Shiokawa et al. | Apr 2003 | B1 |
| 6707259 | Nagao et al. | Mar 2004 | B2 |
| 6777873 | Hashikawa | Aug 2004 | B2 |
| 20030090212 | Park et al. | May 2003 | A1 |
| 20030146713 | Nagao et al. | Aug 2003 | A1 |
| 20030197469 | Kang et al. | Oct 2003 | A1 |
| 20030209982 | Kim et al. | Nov 2003 | A1 |
| 20040051456 | Kim | Mar 2004 | A1 |
| Number | Date | Country |
|---|---|---|
| 1 313 124 | May 2003 | EP |
| 1 398 814 | Mar 2004 | EP |
| 1 434 190 | Jun 2004 | EP |
| 09-129137 | May 1997 | JP |
| Number | Date | Country | |
|---|---|---|---|
| 20060170356 A1 | Aug 2006 | US |
