KR20080013391A - Plasma display device - Google Patents

Abstract

A plasma display panel is provided to coat easily phosphors and perform smoothly an exhaust process by forming lateral barrier ribs on a dielectric layer of an upper substrate. A panel includes an upper substrate(10) and a lower substrate(20). A scan electrode(11), a sustain electrode(12), and a dielectric layer(13) are formed on the upper substrate. An address electrode(22) and a first barrier rib(21) are formed across the scan electrode and the sustain electrode on the lower substrate. A second barrier rib(16) is formed across the first barrier rib of the lower substrate on the dielectric layer of the upper substrate. The height of the second barrier rib is smaller than the height of the barrier rib. The height of the second barrier rib is 70 to 130 micrometers.

Description

Plasma Display Device

1 is a perspective view of a structure of a plasma display panel according to the present invention;

2A to 2B illustrate an embodiment of a cross-sectional top plate structure of the plasma display panel according to the present invention;

3 illustrates an embodiment of an electrode arrangement of a plasma display panel;

4 illustrates an embodiment of a method in which one frame of an image is time-divided and driven into a plurality of subfields in the plasma display device.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device. In particular, by forming a partition on an upper substrate in a direction intersecting a partition formed on a lower substrate of the panel, phosphors are easily applied to the lower substrate, and the exhaustability of the panel is improved. The present invention relates to a plasma display device.

In general, a plasma display panel (hereinafter referred to as a PDP) generates a discharge by applying a predetermined voltage to electrodes installed in a discharge space, and the plasma generated during gas discharge excites a phosphor, thereby causing an image including a character or graphic. As a device for displaying a display device, it is easy to increase in size, light weight, and planar thickness, and provides a wide viewing angle up, down, left, and right, and realize full color and high brightness.

In the conventional PDP, since the horizontal bulkhead and the vertical bulkhead are formed on the lower substrate, the fluorescent material is applied to the upper end of the horizontal bulkhead in the phosphor coating process, and there is a fear of mixing with adjacent adjacent cells, and the exhaust of the panel is smooth. There is a problem that can not be made.

The present invention has been made to solve the above-described problems of the prior art, the plasma is easily applied between the vertical partitions formed on the lower substrate, the plasma is formed on the dielectric layer of the upper substrate in order to improve the exhaust properties of the plasma It is an object to provide a display device.

Plasma display device according to the present invention for solving the above problems is a panel; The panel includes an upper substrate on which a scan electrode, a sustain electrode and a dielectric layer are formed, and a lower substrate on which an address electrode and a first partition are formed in a direction crossing the scan electrode and the sustain electrode, and the lower substrate on the dielectric layer of the upper substrate. A second partition wall is formed in a direction crossing the first partition wall of the substrate.

The height of the second partition is preferably smaller than the height of the first partition, the height of the second partition is characterized in that 70um to 130um.

In addition, the first width in the direction in which the second partition is formed is 210um to 270um, the second width in the direction crossing the first width of the second partition is preferably 30um to 130um.

The second partition and the first partition are formed of substantially the same material, the second partition is preferably formed of a photosensitive material, the second partition may be formed of a material which is substantially black.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a perspective view of the structure of a plasma display panel according to the present invention.

Referring to FIG. 1, a plasma display panel includes a scan electrode 11 and a sustain electrode 12, which are pairs of sustain electrodes formed on an upper substrate 10, and an address electrode 22 formed on a lower substrate 20. It includes.

Each of the sustain electrode pairs 11 and 12 is typically a transparent electrode 11a or 12a formed of indium tin oxide (ITO), a metal such as silver (Ag), chromium (Cr), or chromium / copper. And the bus electrodes 11b and 12b which may be formed in a stack of / chromium (Cr / Cu / Cr) or in a stack of chromium / aluminum / chromium (Cr / Al / Cr). At this time, the bus electrodes 11b and 12b are formed on the transparent electrodes 11a and 12a to reduce the voltage drop caused by the transparent electrodes 11a and 12a having high resistance.

An upper dielectric layer 13 and a protective layer 14 are stacked on the upper substrate 10 on which the scan electrode 11 and the sustain electrode 12 are formed, respectively, and charged particles, which generate plasma, are accumulated on the upper dielectric layer 13. . The protective layer 14 protects the upper dielectric layer 13 from sputtering of charged particles generated during gas discharge, and increases emission efficiency of secondary electrons.

On the upper dielectric layer 13, a horizontal partition wall 16 is formed in a direction crossing the vertical partition wall 21 formed on the lower substrate to form a discharge cell together with the vertical partition wall 21 formed on the lower substrate.

In addition, the PDP has a function of light blocking to reduce the reflection and absorption of external light generated from the outside of the upper substrate 10, and to improve the purity of the upper substrate 10 and the contrast of the PDP. Black Matrix (BM) is formed.

The black matrix is formed between the first black matrix 15 and the transparent electrodes 11a and 12a and the bus electrodes 11b and 12b formed at positions overlapping the horizontal partition 16 formed on the upper substrate 10. It consists of the 2nd black matrices 11c and 12c formed in. As such, the black matrix formed by separating the first and second black matrices 15, 11c and 12c is called a separate type BM, and since the second black matrices 11c and 12c form a layer between the electrodes, the black matrix is black. It may also be called a layer or a black electrode layer.

In addition, the address electrode 22 is formed on the lower substrate 20 in a direction crossing the scan electrode 11 and the sustain electrode 12, and the lower dielectric layer 24 is formed on the lower substrate 20 on which the address electrode 22 is formed. ) And a vertical partition wall 21 are formed, and phosphors 23 are emitted on the surfaces of the lower dielectric layer 24 and the vertical partition wall 21 to emit visible light by ultraviolet rays generated during gas discharge.

Since the structure of the panel shown in FIG. 1 is only an embodiment of the structure of the plasma display panel according to the present invention, the present invention is not limited to the structure of the plasma display panel shown in FIG. 1. For example, the PDP according to the present invention may have a structure in which each of the sustain electrode pairs 11 and 12 omits the transparent electrodes 11a and 12a made of ITO and includes only the bus electrodes 11b and 12b. Since the structure does not use the transparent electrodes 11a and 12a, there is an advantage of lowering the unit cost of panel manufacturing, and the bus electrodes 11b and 12b may be various materials such as photosensitive materials in addition to the materials listed above.

On the other hand, in one embodiment of the invention is shown and described that each of the R, G and B discharge cells are arranged on the same line, it may also be arranged in other formation. For example, a delta type arrangement in which R, G, and B discharge cells are arranged in a triangular shape may be possible, and the shape of the discharge cell may be not only square but also various polygonal shapes such as pentagon and hexagon.

2A to 2B are diagrams illustrating an embodiment of a cross-sectional structure of the plasma display panel of the present invention.

Referring to FIGS. 2A to 2B, the panel includes an upper substrate 100 on which the scan electrode 110, the sustain electrode 111, and the upper dielectric layer 112 are formed, and a horizontal partition wall 113 formed on the upper dielectric layer 112. And an address electrode 213 formed in a direction crossing the scan electrode 110 and the sustain electrode 111, a lower dielectric layer 200, and a lower substrate 200 on which the vertical partition wall 214 is formed.

The horizontal partition wall 113 is formed on the upper dielectric layer 112 in a direction crossing the vertical partition wall 214 and has a predetermined width, unlike the vertical partition wall 214 being long in a stripe shape. As such, the first width P2 of the horizontal bulkhead 113 is 210 μm to 270 μm, and in this case, the discharge cells formed of the vertical bulkheads 214 adjacent to each other are partitioned in the opposite direction to the vertical bulkhead, and the exhaust of the panel is smooth. It is possible to secure the space made.

In addition, the height h of the horizontal bulkhead 113 is preferably formed to be substantially smaller than the height of the vertical bulkhead 214, the height h of the horizontal bulkhead 113 is formed of 70um to 130um. In such a case, since the horizontal partition wall 113 does not substantially touch the phosphor, it is possible to secure the exhaust space of the radiation cells, and when the upper plate and the lower plate are coupled, an alignment miss (according to the height h of the horizontal partition wall 113) no alignment miss occurs.

In addition, the second width P1 in the direction crossing the first width P2 of the horizontal partition wall 113 may be formed to have a thickness of 30 μm to 130 μm. In such a case, it is possible to prevent the discharge cells from being blocked by the horizontal partition wall 113, thereby maintaining the luminance ratio of the panel.

The horizontal bulkhead 113 is preferably formed of substantially the same material as the vertical bulkhead 214 in consideration of cost reduction and ease of manufacture. For example, the horizontal partition wall 113 may be formed of a photosensitive material.

In addition, the horizontal partition wall 113 may be formed of a material having a black color, and thus may function as a black matrix. Accordingly, the manufacturing cost may be reduced by removing the black matrix.

3 is a diagram illustrating an embodiment of an electrode arrangement of a plasma display panel.

Referring to FIG. 3, the plurality of discharge cells constituting the plasma display panel are preferably arranged in a matrix form. The plurality of discharge cells are provided at the intersections of the scan electrodes Y1 to Ym, the sustain electrodes Z1 to Zm, and the address electrodes X1 to Xn, respectively. The scan electrodes Y1 to Ym may be driven sequentially or simultaneously, and the sustain electrodes Z1 to Zm may be driven simultaneously. The address electrodes X1 to Xn may be driven by being divided into odd-numbered and even-numbered electrodes or sequentially driven.

Since the electrode arrangement shown in FIG. 3 is only an embodiment of the electrode arrangement of the plasma display panel according to the present invention, the present invention is not limited to the electrode arrangement and driving method of the plasma display panel shown in FIG. 4. For example, a dual scan method in which two scan electrodes of the scan electrodes Y1 to Ym are simultaneously scanned is possible, and the address electrodes X1 to Xn are divided up and down at the center of the panel. It may be driven.

4 is a diagram illustrating an embodiment of a method of time-division driving one frame of an image into a plurality of subfields in the plasma display apparatus.

Referring to FIG. 4, a unit frame may be time-division driven to a predetermined number, for example, eight subfields SF1,..., SF8 to express the gray level of an image. Each subfield SF1, ..., SF8 is divided into a reset section (not shown), an address section A1, ..., A8, and a sustain section S1, ..., S8. .

In each address section A1, ..., A8, a data signal is applied to the address electrode X, and corresponding scan pulses are sequentially applied to each scan electrode Y. FIG. Sustain pulses are alternately applied to the scan electrode Y and the sustain electrode Z in each of the sustain periods S1, ..., S8, so that the discharge cells selected in the address periods A1, ..., A8 are alternately applied. Cause sustain discharge.

The luminance of the plasma display panel is proportional to the number of sustain discharges in the sustain periods S1, ..., S8 occupied in the unit frame. When one frame forming one image is represented by eight subfields and 256 gray levels, each subfield in turn has different sustain pulses at a ratio of 1, 2, 4, 8, 16, 32, 64, and 128. The number of can be assigned. Alternatively, in order to obtain luminance of 133 gray levels, cells may be sustained by addressing cells during subfield 1, subfield 3, and subfield 8 sections.

Meanwhile, the number of sustain discharges allocated to each subfield may be variably determined according to the weights of the subfields. That is, in FIG. 4, a case in which one frame is divided into eight subfields has been described as an example. However, the present invention is not limited thereto, and the number of subfields forming one frame may be variously modified according to design specifications. . For example, the plasma display panel may be driven by dividing one frame into eight or more subfields or the like, such as 12 or 16 subfields.

As described above, the plasma display device according to the present invention has been described with reference to the illustrated drawings. However, the present invention is not limited by the embodiments and drawings disclosed herein, and the application is made by those skilled in the art within the technically protected scope of the present invention. It is possible.

The plasma display device of the present invention configured as described above forms a horizontal barrier rib on the dielectric of the upper substrate so as to connect the lower substrate and the discharge cell formed on the lower substrate. There is an effect that the exhaust is smooth.

Claims (8)

panel; The panel includes an upper substrate on which a scan electrode, a sustain electrode and a dielectric layer are formed; A lower substrate having an address electrode and a first partition formed in a direction crossing the scan electrode and the sustain electrode; And a second partition wall formed on the dielectric layer of the upper substrate in a direction crossing the first partition wall of the lower substrate. The method of claim 1, And a height of the second partition wall is smaller than a height of the first partition wall. The method of claim 2, The height of the second partition wall is a plasma display device, characterized in that 70um to 130um. The method of claim 1, And a first width in a direction in which the second partition wall is formed is 210 um to 270 um. The method of claim 1, And a second width in a direction crossing the first width of the second partition wall is in the range of 30um to 130um. The method of claim 1, And the second partition wall and the first partition wall are formed of substantially the same material. The method of claim 1, And the second partition wall is formed of a photosensitive material. The method of claim 1, And the second partition wall is formed of a substantially black material.

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