KR20070091980A - Plasma display device - Google Patents

Abstract

A plasma display device is provided to improve discharge efficiency and to reduce a manufacturing cost by forming a discharge space between scan electrodes and sustain electrodes. A barrier rib is formed on a rear substrate(20) in order to define a plurality of address electrodes(21) and a plurality of discharge cells. A front substrate(10) is disposed opposite to the rear substrate. A plurality of scan electrodes(11) and a plurality of sustain electrodes(12) are formed on the front substrate. The scan electrodes and the sustain electrodes are formed opposite to each other in the discharge cells. A black matrix layer(15) is formed on the scan electrodes and the sustain electrodes. The black matrix layer is wider than the scan electrode and the sustain electrode. The scan electrodes and the sustain electrodes belong to the metallic bus electrodes.

Description

Plasma Display Device

1 is a perspective view showing the configuration of a plasma display device according to the present invention;

2 is a perspective view showing a first embodiment of a plasma display device according to the present invention;

3A is a plan view showing a first embodiment of a plasma display device according to the present invention;

3B is an enlarged view of a first embodiment of the plasma display device according to the present invention.

<Explanation of symbols on main parts of the drawings>

10: front substrate 11: scanning electrode

12 sustain electrode 13 first dielectric layer

14 dielectric protective layer 15 black matrix

20: back substrate 21: address electrode

22: second dielectric layer 23: partition wall

24: phosphor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, wherein a scan electrode and a sustain electrode are formed inside the discharge cell so as to face the counter electrode, and a BM layer having a wider width than that of the scan electrode and the sustain electrode is formed of the scan electrode and the sustain electrode. It relates to a plasma display device to be formed on.

In general, a plasma display panel (hereinafter referred to as a PDP) is formed of red (R), green (G) and blue (B) generated by excitation of a phosphor by vacuum ultraviolet (VUV) radiation emitted from a plasma obtained through gas discharge. A display device that implements a predetermined image using visible light.

Such a PDP can realize an ultra-large screen of 60 inches or more with a thickness of only 10 cm or less, and since it is a self-luminous display device such as a CRT, it has no characteristic of distortion due to color reproducibility and viewing angle. As a result, it is gaining popularity as a TV and an industrial flat panel display having strength in terms of productivity and cost.

In the surface discharge type PDP, which is widely adopted at present, the scan electrode, the sustain electrode, and the address electrode interact with each other to generate a plasma discharge in the discharge cell, thereby realizing a screen.

The plasma display panel is a gas discharge display device using a light emitting phenomenon in which vacuum ultraviolet rays generated when an inert gas is discharged between two glass substrates facing each other excite phosphors.

In addition, the plasma display panel includes a front substrate and a rear substrate facing each other, and a scan electrode, a sustain electrode, and a dielectric layer are formed on the front substrate.

The rear substrate includes a plurality of address electrodes for dividing the entire screen into a plurality of cells together with the scan electrode and the sustain electrode, a dielectric layer for protecting the address electrode and performing electrode insulation, a partition wall forming a discharge cell; It is made of a phosphor that is printed and coated inside the discharge cells formed by the barrier ribs and is excited by ultraviolet rays during the discharge of each cell to emit visible light.

In addition, the plasma display panel is formed with a transparent electrode connected to each scan electrode and the sustain electrode formed on the front substrate, wherein the transparent electrode has a predetermined gap (GAP) inside the discharge cell, and the address electrode The discharge generates a plasma, and the ultraviolet rays emitted from the plasma excite the phosphor and emit light.

When voltage is applied to any one of the address electrode and the scan electrode and the sustain electrode, an address discharge is generated between them, and charged particles are formed on the lower surface of the dielectric layer of the front substrate, whereby sustain discharge is performed. It is made between the transparent electrodes of the scan electrode and the sustain electrode having a gap (GAP) of.

In the conventional plasma display panel, the transparent electrode which generates the address electrode and the plasma discharge has transmittance and conductivity, and plasma discharge is performed at a predetermined gap between the transparent electrodes, wherein the plasma electrode is connected to the scan electrode and the sustain electrode. The transparent electrode has a problem that the resistance value is large, the discharge efficiency is lowered, the discharge efficiency is lowered through the transparent electrode patterning process, and the manufacturing cost is increased.

In addition, the plasma display panel may be discolored on the electrode surface after firing at a portion where the electrode surface and glass are in contact with each other during the aging process, thereby reducing image quality and discharging efficiency, thereby reducing the efficiency of the panel.

The present invention has been made to solve the above problems of the prior art, the object of which is that the scan electrode and the sustain electrode is formed inside the discharge cell to face each other toward the counter electrode, it is wider than the scan electrode and the sustain electrode The BM layer is formed on the scan electrode and the sustain electrode, to prevent discoloration occurring on the electrode surface of the panel and to improve the discharge efficiency.

In order to solve the above problems, a back substrate having a plurality of address electrodes and partition walls partitioning discharge cells according to the present invention, and a front substrate facing the back substrate and having a plurality of scan electrodes and sustain electrodes formed thereon, And the scan electrode and the sustain electrode are formed inside the discharge cell so as to face the counter electrode, and a BM layer having a wider width than the scan electrode and the sustain electrode is formed on the scan electrode and the sustain electrode. .

In addition, the scan electrode and the sustain electrode may be electrically connected to a neighboring discharge cell to form a first electrode part formed inside the discharge cell, a second electrode part spaced apart from the first electrode part at a predetermined interval, and the And a third electrode portion connecting the first electrode portion and the second electrode portion.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view showing the configuration of a plasma display device according to the present invention. The scan electrode and the sustain electrode of the plasma display device should be arranged in units of discharge cells, but only one scan electrode and one sustain electrode are shown for convenience.

As shown in FIG. 1, the plasma display device according to the present invention includes a front substrate 10 and a back substrate 20.

In this case, a scan electrode 11 and a sustain electrode 12 are formed on the front substrate 10, and a first dielectric layer 13 is preferably stacked adjacent to the scan electrode 11 and the sustain electrode 12. Do. In addition, a dielectric protective layer 14 may be included to protect the first dielectric layer 13.

In addition, the back substrate 20 is provided with an address electrode 21 and a second dielectric layer 22 facing the scan electrode 11 and the sustain electrode 12 formed on the front substrate 10.

In addition, a partition 23 partitioning the discharge cell, and a phosphor 24 that is excited by ultraviolet rays at the time of discharge and emits visible light are coated inside the discharge cell.

In addition, the plasma display panel configured as described above applies a voltage having opposite polarity to the scan electrode 11, the sustain electrode 12, and the address electrode 21 to select a cell in which discharge is to be generated, and the scan electrode ( 11) and the sustain electrode 12 alternately apply a voltage to generate a discharge.

Therefore, when a vacuum ultraviolet ray (VUV) is generated by the discharge, the vacuum ultraviolet ray (VUV) excites / lights up the phosphor 24 coated in the discharge space to generate visible light, thereby providing the user with an image through the screen. Will be shown.

2 is a perspective view showing a first embodiment of a plasma display device according to the present invention, FIG. 3A is a plan view showing a first embodiment of the plasma display device according to the present invention, and FIG. 3B is a plasma display device according to the present invention. A first embodiment of is an enlarged view.

Here, the partition walls forming the discharge cells of the plasma display device may be formed in a stripe shape, a lattice shape, a honeycomb shape, etc. The scan electrode and the sustain electrode of the plasma display panel may be formed regardless of the partition wall partitioning discharge cells. Since they are formed in the same manner, the partition wall shape will be described in the present specification.

As shown in FIG. 2, the scan electrode 11 and the sustain electrode 12 are formed on the front substrate 10 in parallel with each other, and the scan electrode 11 and the sustain electrode 12 are formed on the front substrate 10. It is formed to be orthogonal to the address electrode 21 of the back substrate 20.

Here, the scan electrode 11 and the sustain electrode 12 are formed inside the discharge cell v of the rear substrate 20 so as to face the counter electrode, thereby causing discharge with the address electrode 21.

In addition, the scan electrode 11 and the sustain electrode 12 are formed inside the discharge cell (V) of the back substrate 20, the scan electrode 11 and the sustain electrode 12 is adjacent to the discharge cell ( It is formed in electrical connection with V).

In this case, the scan electrode 11 and the sustain electrode 12 are formed in an I-shape to face toward the counter electrode, and a predetermined gap GAP is formed between the scan electrode 11 and the sustain electrode 12. The discharge space is formed to form a plasma discharge.

In addition, a BM layer (black matrix) is formed on the scan electrode 11 and the sustain electrode 12, and the formed BM layer is wider than the scan electrode 11 and the sustain electrode 12. It is formed on the electrode 11 and the sustain electrode 12.

Herein, the structure according to the first embodiment of the plasma display apparatus will be described in detail.

As shown in FIGS. 3A to 3B, the scan electrode 11 and the sustain electrode 12 are formed to face each counter electrode so as to be formed inside one discharge cell.

In this case, the scan electrode 11 is electrically connected to a neighboring discharge cell and is spaced apart from each other at a predetermined interval from the first electrode portion 11a and the first electrode portion 11a. It is comprised including the 2 electrode part 11b and the 3rd electrode part 11c which connects the said 1st electrode part 11a and the 2nd electrode part 11b.

In addition, the sustain electrode 12 includes a first electrode part 12a, a second electrode part 12b, and a third electrode part 12c, similarly to the scan electrode 11.

Here, a predetermined gap GAP is formed between the first electrode part 11a of the scan electrode 11 and the first electrode part 12a of the sustain electrode 12, and in the formed gap GAP, The discharge space P in which discharge is made with the address electrode 21 is formed.

In this case, the width of the gap GAP formed between the first electrode portion 11a of the scan electrode 11 and the first electrode portion 12a of the sustain electrode 12 is approximately 100 μm in length. It is desirable to be.

In addition, the first electrode portion 11a of the scan electrode 11 and the first electrode portion 12a of the sustain electrode 12 are the second electrode portion 11b of the scan electrode 11 and the sustain electrode 12. 12b), it is preferably formed wider than the length of the width of the third electrode portion (11c, 12c).

That is, the width of the first electrode portion 11a of the scan electrode 11 and the first electrode portion 12a of the sustain electrode 12 is wider than that of other electrode portions, and the first electrode portion 11a of the scan electrode 11 is formed. The gap GAP between the first electrode portion 11a and the first electrode portion 12a of the sustain electrode 12 is formed to have a length of 100 μm, whereby the discharge efficiency and luminance are increased when stable discharge is performed during plasma discharge. It is effective.

In addition, the second electrode part 11b of the scan electrode 11 and the second electrode part 12b of the sustain electrode 12 are formed at a position where UV is most generated during plasma discharge.

For example, the second electrode portion 11b of the scan electrode 11 and the second electrode portion 12b of the sustain electrode 12 are phosphors coated inside the discharge cell v of the back substrate 20. Since the phosphor 24 is formed at a position where a large amount of the phosphor 24 is coated in comparison with the other portions, the discharge efficiency of the phosphor 24 is improved during the plasma discharge.

In addition, the rear substrate may include the third electrode portions 11c and 12c connecting the first electrode portions 11a and 12a and the second electrode portions 11b and 12b of the scan electrode 11 and the sustain electrode 12. It is formed to overlap with the address electrode 21 of (20).

In the plasma display device, a BM (black matrix) layer 15 having a width wider than that of the scan electrode 11 and the sustain electrode 12 is formed on the scan electrode 11 and the sustain electrode 12.

In this case, the BM layer 15 formed on the scan electrode 11 and the sustain electrode 12 is cobalt oxide as a conductive material, and has a width of 5 μm to 10 greater than that of the scan electrode 11 and the sustain electrode 12. It is preferable to form wide with the length within micrometer.

For example, the BM layer 15 is formed wide at a length of 5 μm to 10 μm at the ends of the scan electrode 11 and the sustain electrode 12, so that the scan electrode 11 and the sustain electrode are wide. It is formed on (12).

In the plasma display apparatus, the BM layer 15 is formed to have a width that is about 5 μm to 10 μm wider than that of the scan electrode 11 and the sustain electrode 12. The image quality of the plasma display device is improved and discharged because the front substrate 10 and the scan electrode 11 and the sustain electrode 12 are not only prevented from discoloring but also cover a slight discoloration. The efficiency is improved.

 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 is provided to those skilled in the art within the scope of the technical idea of the present invention. Application is possible.

In the plasma display device according to the present invention configured as described above, a BM layer having a wider width than that of the scan electrode and the sustain electrode is formed on the scan electrode and the sustain electrode which are electrically connected to neighboring discharge cells and are formed inside the discharge cell. As a result, a discharge space is formed between the scan electrode and the sustain electrode formed inside the discharge cell, thereby improving the discharge efficiency and reducing the manufacturing cost during the discharge, and preventing the electrode from discoloring at the portion where the electrode surface and the glass are in contact with each other. The image quality can be output, which increases the efficiency of the panel.

Claims (9)

A back substrate having a partition wall defining a plurality of address electrodes and discharge cells; A front substrate facing the rear substrate and having a plurality of scan electrodes and a sustain electrode formed thereon; Wherein the scan electrode and the sustain electrode are formed inside the discharge cell to face the counter electrode, and a BM layer having a wider width than the scan electrode and the sustain electrode is formed on the scan electrode and the sustain electrode. . The method according to claim 1, And the scan electrode and the sustain electrode are metal bus electrodes. The method according to claim 1, The scan electrode and the sustain electrode may be electrically connected to a neighboring discharge cell to form a first electrode part formed inside the discharge cell, a second electrode part spaced apart from the first electrode part at a predetermined interval, and the first electrode part. And a third electrode portion connecting the electrode portion and the second electrode portion. The method according to claim 3, And a discharge space is formed from a gap between the first electrode portion of the scan electrode and the first electrode portion of the sustain electrode. The method according to claim 4, And a gap having a width of 100 μm between the first electrode portion of the scan electrode and the first electrode portion of the sustain electrode. The method according to claim 3, And a first electrode portion of the scan electrode and the sustain electrode is wider than the second electrode portion and the third electrode portion. The method according to claim 3, And a third electrode portion of the scan electrode and the sustain electrode overlapping the address electrode formed on the back substrate. The method according to claim 1, And the BM layer is formed to have a length within a range of 5 μm to 10 μm than a length of the widths of the scan electrode and the sustain electrode. The method according to claim 8, And the BM layer is formed of cobalt oxide as a conductive material.

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