KR20070027395A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to prevent transfer of electric charges by forming protrusions on a dielectric layer, thereby suppressing afterimage from being generated. A plasma display panel includes a rear panel(430) with partitions(440) formed in a predetermined pattern to define at least one discharge cell(431,432), and a front panel(420) having a dielectric layer(416), on which protrusions(405,415) are formed according to the pattern of the partitions. An upper layer portion of the protrusion is overlapped over an upper layer portion of the partition in the discharge cell. The protrusion has the same shape as that of the upper layer portion of the partition.

Description

Plasma Display Panel

1 is a view showing the structure of a typical plasma display panel.

2 is a cross-sectional view showing the structure of an RGB discharge cell of a conventional plasma display panel.

3 is a view showing a discharge and wall charge distribution in a conventional plasma display panel.

4 illustrates the structure of a plasma display panel according to the present invention;

5 is a diagram showing a relationship between protrusions of a dielectric layer on a front panel and partition walls on a back panel;

6a to 6b and 6c are views showing the shape of the protrusion of the upper dielectric layer according to the shape of the partition wall.

7 is a cross-sectional view showing the structure of a plasma display panel according to the present invention;

 <Explanation of symbols for the main parts of the drawings>

403: sustain electrode 405: protrusion

412 scan electrode 416 dielectric layer

420: front panel 425: wall charge

430: rear panel 431: discharge cell

440: bulkhead

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel including a dielectric layer.

In the conventional plasma display panel, a partition wall formed between the front substrate and the rear substrate forms one unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and The same main discharge gas and an inert gas containing a small amount of xenon (Xe) are filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 illustrates a structure of a general plasma display panel.

As illustrated in FIG. 1, a plasma display panel includes a front panel in which a plurality of sustain electrode pairs formed by pairing a scan electrode 102 and a sustain electrode 103 are arranged on a front substrate 101 that is a display surface on which an image is displayed. 100 and the rear panel 110 on which the plurality of address electrodes 113 are arranged so as to intersect the plurality of storage electrode pairs described above on the rear substrate 111 forming the rear surface are coupled in parallel with a predetermined distance therebetween.

The front panel 100 is made of a scan electrode 102 and a sustain electrode 103, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 102 and the sustain electrode 103 provided as the bus electrode b are included in pairs. The scan electrode 102 and the sustain electrode 103 are covered by one or more upper dielectric layers 104 that limit the discharge current and insulate the electrode pairs, and facilitate discharge conditions on top of the upper dielectric layer 104. In order to do this, a protective layer 105 on which magnesium oxide (MgO) is deposited is formed.

The rear panel 110 is arranged in such a manner that a plurality of discharge spaces, that is, barrier ribs 112 of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 113 are arranged in parallel with the partition wall 112 to perform address discharge so that the inert gas in the discharge cell generates vacuum ultraviolet rays. On the upper side of the rear panel 110, red (R), green (G), and blue (B) phosphors 114 which emit visible light for image display during sustain discharge are coated. A lower dielectric layer 115 is formed between the address electrode 113 and the phosphor 114 to protect the address electrode 113.

2 is a cross-sectional view showing the structure of an RGB discharge cell of a conventional plasma display panel.

As shown in FIG. 2, the dielectric layer 204 formed on the front panel 210 and covering the electrodes 202 and 203 on the front substrate 201 and the front substrate 201 has a scan electrode 202 formed therein. ) And the sustain electrode 203 are electrically insulated from each other. A protective layer 205 is formed on the dielectric layer 204 to protect the weakly durable dielectric layer 204, to allow the plasma display panel to operate stably for a long time, and to discharge a large amount of secondary electrons during discharge. It acts to lower.

A partition wall partitioning the RGB discharge cells is formed on the rear panel 220, and the partition wall serves as a boundary for the discharge cells.

Looking at the discharge structure of the conventional plasma display panel with such a structure as follows.

3 is a view showing a discharge and wall charge distribution in a conventional plasma display panel.

As shown in FIG. 3, when a predetermined pulse is applied to the scan electrode 302 and the sustain electrode 303 of the conventional front panel, wall charges 315 are accumulated on the passivation layer 305 to discharge. This will occur.

However, since the wall charges 315 are formed on the surface of the protective layer 305, the wall charges 315 have a separation distance between the barrier 310 of the rear panel and the protective layer 305 of the front panel. Since the positive charge of 315 affects the adjacent discharge cells 320, there is a problem that an afterimage occurs at the interface between the discharge cells 330 and 320.

In addition, since the positive charge of the wall charge 315 moves to the adjacent cell 320 on the surface of the protective layer 305 of the front panel, the wall charge 315 for discharging is insufficient. Therefore, when a predetermined voltage is applied, there is a problem in that an incorrect discharge occurs due to insufficient wall charges.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a plasma display panel which improves luminance and efficiency by preventing erroneous discharges and afterimages caused by movement of wall charges between adjacent cells.

Plasma display panel of the present invention for achieving the above object is characterized in that it comprises a rear panel having partitions for partitioning one or more discharge cells in a predetermined pattern and a front panel having a dielectric layer formed with protrusions according to the pattern of the partitions. do.

In addition, an upper layer portion of the dielectric layer protrusion and an upper layer portion of the partition wall formed on the rear panel may be overlapped in the horizontal direction and the vertical direction in the discharge cell.

In addition, the shape of the protrusion is characterized in that the same as the shape of the upper layer of the partition wall.

In addition, the shape of the protrusions and the shape of the upper layer of the partition wall is characterized in that the polygon.

In addition, the shape of the upper layer portion and the protrusion of the partition wall is characterized in that one of the circular and oval.

The protrusion may be made of a material having a dielectric constant smaller than that of the dielectric layer.

Hereinafter, a plasma display panel according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a view showing the structure of a plasma display panel according to the present invention.

As shown in FIG. 4, the plasma display panel according to the present invention includes a rear panel 430 including a partition wall defining a discharge cell, a dielectric layer 416 formed on the scan electrode 412 and the sustain electrode 403. The front panel 420 is formed.

The front panel 420 and the rear panel 430 are formed to be bonded to each other. The dielectric layer 416 of the front panel 420 includes the plurality of scan electrodes 412 and the sustain electrode 403 formed on the front panel 420. ) Is formed with a plurality of protrusions (405, 415) in the upper part coincident.

The plurality of protrusions 405 and 415 of the dielectric layer 416 on the front panel 420 have the following characteristics.

First, the protrusions 405 and 415 of the dielectric layer 416 are formed in different shapes according to a predetermined pattern in which the partition walls 440 of the rear panel 430 are formed and are formed in the discharge cells 431 and 432 of the rear panel 430. . More details will be described in detail with reference to FIG. 5.

In addition, the protrusions 405 and 415 of the dielectric layer 416 on the front panel 420 may generate wall charges 425 when surface discharge occurs between the scan electrode 412 and the sustain electrode 403 when a predetermined voltage is applied from the driver. It plays a role in forming a lot.

That is, the protrusions 405 and 415 serve as potential barriers between the plurality of protrusions 405 and 415 of the dielectric layer 416 to accumulate wall charges 425 so that the adjacent cells 432 having different positive charges of the wall charges 425. ) To prevent the movement of the charge 425 accumulated in the wall charge 425.

The protrusions 405 and 415 of the dielectric layer 416 may vary in width and height according to a predetermined pattern in which the partition wall 440 of the rear panel 430 is formed. Also, the protrusions 405 and 415 may vary in width and height according to discharge characteristics. Do.

The portion "A" showing the relationship between the protrusions 405 and 415 of the dielectric layer 416 formed on the front panel 420 and the partition wall 440 of the rear panel 430 will be described in detail with reference to FIG. 5.

5 is a diagram illustrating a relationship between protrusions of a dielectric layer on a front panel and partition walls on a back panel.

As shown in FIG. 5, the plasma display panel according to the present invention includes a back panel including a partition wall 540 partitioning one or more discharge cells 520 and 530, and a dielectric layer on the scan electrode 502 and the sustain electrode 503. The front panels of the protrusions 550 and 560 are formed to be bonded to each other.

At this time, the front panel is formed with the protrusions 550 and 560 of the dielectric layer facing the respective discharge cells 520 and 530. The protrusions 550 and 560 of the dielectric layer are formed on the front panel where the scan electrode 503 and the sustain electrode 502 coincide with each other, and are formed to be equal to or narrower than the gap between the scan electrode 503 and the sustain electrode 502.

In addition, the protrusions 550 and 560 of the dielectric layer and the upper portion of the partition 540 partitioning the discharge cells 520 and 530 of the rear panel overlap the horizontal and vertical directions in the discharge cells 520 and 530 on the front panel. In this case, the protrusions 550 and 560 of the dielectric layer may be formed longer in the direction of the discharge cells 520 and 530 than the upper portion of the partition wall 540 of the rear panel.

Therefore, forming the relationship between the protrusions 550 and 560 of the dielectric layer and the partition wall 540 in detail can prevent the wall charges 570 and 580 from passing over to the adjacent discharge cells 530 and 530. And to prevent mis-discharge.

In an even more effective way, the dielectric layers 576 and 517) and the protrusions 550 and 560 are formed of different materials so that the dielectric constants of the protrusions 550 and 560 are smaller than those of the dielectric layers 576 and 517. When formed as, the wall charges are further formed between one of the protrusions 550 and one of the protrusions 550, not shown, because the dielectric constant of the protrusions 550 and 560 is small. In addition, the adjacent protrusions 560 also have the same properties as the protrusions not shown.

Meanwhile, in the discharge cells 520 and 530 of the rear panel, the protrusions 550 and 560 of the dielectric layer on the front panel have the same shape as the upper layer of the partition wall 540 of the rear panel, so that the front panel and the rear panel are easily joined.

Herein, the shape structure of the protrusion of the dielectric layer of the front panel and the partition of the rear panel may be represented in various shapes in FIGS. 6A to 6B and 6C as follows.

6A, 6B, and 6C are views illustrating the shape of protrusions of the upper dielectric layer according to the shape of the partition wall. Here, the partition wall may have various polygonal shapes. Only a few examples according to one embodiment are shown.

As shown in FIG. 6, the plasma display panel according to the present invention has the same shape as the upper partition portions 640a, 640b and 640c of the rear panel and the protrusions 650a, 650b and 650c of the dielectric layer on the front panel.

Therefore, the upper layer portions 640a, 640b, and 640c of the partition walls have circular, trapezoidal, and staircase shapes, respectively. The dielectric layer protrusions 640a, 640b, and 640c of the front panel have the same shape as the upper layer of the partition wall.

In addition, the dielectric layer protrusions 650a, 650b, and 650c of the front panel and the upper wall portions 640a, 640b, and 640c of the rear panel are horizontally 670a, 670b, 670c, and vertical (660a, 660b, 660c) directions with respect to each other. It is overlapped and wrapped.

The structure in which the dielectric layer protrusion of the front panel and the partition of the rear panel are formed is shown in cross-sectional view in FIG.

7 is a cross-sectional view showing the structure of a plasma display panel according to the present invention.

As shown in FIG. 7, the plasma display panel according to the present invention includes a front panel between a plurality of protrusions 750 formed in the dielectric layer 710 of the front panel 700 and the partition wall 740 of the rear panel 701. The dielectric layer protrusion 750 of 700 is formed in the discharge cell 730 in the discharge cell 730 partitioned by the partition wall 740 of the rear panel 701.

Therefore, when a predetermined pulse is applied to the scan electrode (not shown) and the sustain electrode (not shown) by a predetermined voltage between the protrusions 750 of the dielectric layer 710 on the front panel 700, the dielectric layer 710 is applied. Since wall charges are accumulated on the surface, the neighboring discharge is formed because the protrusion 750 of the dielectric layer 710 on the front panel 700 and the upper layer portion of the partition wall 740 on the rear panel 701 are formed in the same shape at the narrowest possible interval. The transfer of charges to the cell can be prevented as much as possible.

As such, the structure of the plasma display panel according to the present invention not only prevents wall charges by moving the dielectric layer protrusions of the front panel, but also has the same shape according to a predetermined pattern of partition walls on the rear panel so that the front panel and the rear panel are It can be easily combined.

In addition, the wall charges formed between the protrusions of the dielectric layer on the front panel may inhibit the movement to the adjacent cell, thereby lowering the discharge start voltage and causing the discharge to be at a low voltage, preventing the afterimage from occurring at the interface between the discharge cells, and preventing false discharge. It provides a mechanism to dramatically improve brightness and efficiency.

As described above, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features.

Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

Plasma display panel according to the present invention has the effect of improving the brightness and efficiency by preventing the occurrence of erroneous discharge and afterimages by forming a protrusion of the dielectric layer to prevent the movement of charge.

Claims (7)

A rear panel in which a partition wall for partitioning one or more discharge cells is formed in a predetermined pattern; A front panel having a dielectric layer having protrusions formed according to the pattern of the partition wall; Plasma display panel comprising a. The method of claim 1, And an upper layer portion of the protruding portion and an upper layer portion of the partition wall overlap in a horizontal direction in the discharge cell. The method of claim 2, And an upper layer portion of the protruding portion and an upper layer portion of the partition wall overlap vertically in the discharge cell. The method of claim 2, The protrusion part has the same shape as the upper layer part of the partition wall. The method of claim 4, wherein And a shape of the protrusion and an upper layer of the partition is polygonal. The method of claim 4, wherein And a shape of an upper layer of the partition and a shape of the protrusion is one of a circle and an oval. The method of claim 1, And the protrusion is made of a material having a dielectric constant smaller than that of the dielectric layer.

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