KR100592269B1 - Plasma display panel - Google Patents

Abstract

According to the present invention, the barrier ribs are firmly adhered to and fixed to the rear panel when manufacturing the barrier ribs of the plasma display panel, thereby reducing the noise generated in the protection area during the driving of the plasma display panel, and improving the lifetime of the plasma display panel. It is for the purpose of providing. In order to achieve the above object, the present invention is spaced apart from each other, disposed facing each other, the edge is sealed between the front substrate and back substrate, the partition wall disposed between the front substrate and the rear substrate to define a plurality of discharge cells And a bonding means disposed on at least a portion between at least one of the front substrate and the rear substrate and the partition wall.

Description

 Plasma display panel {Plasma display panel}

1 is a perspective view of a plasma display panel displaying a noise generating area of a typical plasma display panel;

2 is a photograph of the rising and lifting phenomenon of the protective bulkhead,

3 is a perspective view showing an original plate of a plasma display panel having a multi-sided surface;

4 is a plan view showing a protection area and a display area of the plasma display panel according to the first embodiment of the present invention;

5 is a partially cutaway perspective view of the plasma display panel according to the first embodiment of the present invention;

FIG. 6A is a cross-sectional view taken along line VIa-VIa of the plasma display panel of FIG. 5,

FIG. 6B is a cross-sectional view taken along line VIb-VIb of the plasma display panel of FIG. 5;

7 is a perspective view showing a manufacturing process of a rear panel of the plasma display panel according to a modification of the first embodiment of the present invention;

8 is a partially cutaway perspective view illustrating a plasma display panel according to a second embodiment of the present invention;

9 is a partially cutaway perspective view showing a plasma display panel according to a third embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

10, 30, 100, 400, 500: plasma display panel

110, 410, 510: front panel 120, 420, 520: rear panel

300: the original plate of the plasma display panel

150, 450, 550: protection area 190, 490, 590: display area

151: cutout 127: bonding means

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, in which a partition wall is firmly adhered to and fixed to a rear panel, so as to reduce noise generated when the plasma display panel is driven and to prolong life.

Plasma display panels are devices that display images using gas discharge phenomena, and are excellent in various display abilities such as display capacity, brightness, contrast, afterimage, viewing angle, etc., and are being spotlighted as devices that can replace CRTs. In such a plasma display panel, a discharge is generated in a discharge cell filled with a discharge gas by a direct current or an alternating voltage applied between electrodes, and ultraviolet rays emitted from the discharge gas excite a phosphor to emit visible light, thereby realizing an image. do. The plasma display panel adopts a discharge mechanism that emits light by applying a high voltage to the discharge cell as a light emitting means, and a shock wave due to discharge is generated inside the discharge cell. Such a shock wave may hit the inner surfaces of the discharge cell to generate loud noise. If the noise is not generated, a number of problems such as a decrease in product value and a weak product competitiveness of the plasma display panel used as a home display device may occur. On the other hand, the occurrence of loud noise in the plasma display panel means that problems such as undesired cracks are generated in the plasma display panel. In this case, in order to increase the product competitiveness of the plasma display panel, a lifespan of a predetermined level or more is required, but if an unexpected crack or the like occurs inside the plasma display panel, a shock wave due to discharge generated in the plasma display panel vibrates the discharge cell. In addition, when resonance occurs in a structurally weak portion, a force that is continuously repeated is applied to cracks that have already been generated, thereby causing cracks to grow, thereby shortening the lifespan of the plasma display panel.

SUMMARY OF THE INVENTION An object of the present invention is to provide a high quality plasma display panel by solving the above problems and reducing the noise of the plasma display panel and extending the life.

In order to achieve the above object, the present invention is spaced apart from each other, disposed facing each other, the edge is sealed between the front substrate and the rear substrate, the partition which is disposed between the front substrate and the rear substrate to define a plurality of discharge cells And a bonding means disposed on at least a portion between at least one of the front substrate and the rear substrate and the partition wall.

The barrier ribs may include display partition barriers defining discharge cells of a display area displaying an image together with the front substrate and the rear substrate, and protective barrier ribs disposed around the front substrate and the rear substrate.

In addition, the adhesive means may be disposed between at least one of the front substrate and the rear substrate and the protective partition wall.

On the other hand, the partitions may be arranged in the form of a matrix or stripe.

Meanwhile, a dielectric layer may be disposed between the barrier ribs and the rear substrate, and the adhesive means may be disposed on at least a portion of the barrier ribs and the dielectric layer.

On the other hand, the bonding means may be a frit layer.

In addition, the partitions and the frit layer may be bonded by a firing process.

On the other hand, the partitions may be manufactured by a sandblasting method.

The plasma display panel may include at least one discharge electrode disposed on a rear surface of the front substrate, a front dielectric layer formed on the front substrate so as to cover the discharge electrode, and disposed on a front surface of the rear substrate. Address electrodes having a portion intersecting the discharge electrode in a discharge cell, a rear dielectric layer formed on the rear substrate to cover the address electrodes, a phosphor layer disposed in the discharge cell, Discharge gas may be further provided.

On the other hand, the plasma display panel, wherein the barrier rib is formed of a dielectric material, at least one discharge electrode disposed to surround the discharge cell in the barrier rib, the phosphor layer disposed in the discharge cell, and the discharge charged in the discharge cell Gas may be provided.

A first embodiment of the present invention will be described with reference to FIGS. 1 to 6B.

1 illustrates a noise generating area 20 generated when the plasma display panel 10 is driven. When driving the plasma display panel, a shock wave is generated by the discharge generated in the discharge cells of the plasma display panel. The shock wave strikes the inside of the discharge cell, causing loud noise to the plasma display panel. As a result of observing such a noise generating area, it was observed that the noise is mainly generated in the upper and lower sides 20 of the plasma display panel. Based on the observation, the result of observing the noise generating area of the plasma display panel through the photograph is shown in FIG. 2. Looking at Figure 2, it can be observed that the rise and lifting phenomenon occurs in the partition wall. This is because even if the partition wall is not properly adhered to the rear panel of the plasma display panel or properly adhered, it is determined that the adhesion is insufficient due to the additional process. In particular, it was confirmed through experiments that mainly occurs when the multi-faceted method to produce a plasma display panel inexpensively and efficiently. Hereinafter, the application of the multi-faceted method, the noise caused by the bumps and the lifting of the bulkhead, and the means for solving the same will be described in detail.

3 shows an original plate 300 of a plasma display panel having a multi-faced embodiment according to the first embodiment of the present invention. When the original plate of the plasma display panel manufactures the front panel 80 and the rear panel 90 at the same time and combines the same, and then manufactures the original plate of the plasma display panel into a plurality of plasma display panel 30 It is for the application of the drafting method. In general, in the manufacture of a plasma display panel, after manufacturing the front panel and the rear panel constituting one plasma display panel, respectively, it is completed by combining the front panel and the rear panel. However, in this method, since the same process of forming the partitions on the rear panel or arranging the electrodes must be performed separately for the manufacture of each plasma display panel, the manufacturing cost is increased and the process efficiency is lowered. In order to solve this problem, by manufacturing the original plate 300 of the plasma display panel having a multi-sided to be made of a plurality of plasma display panel 30, integrating the various processes such as partition formation and electrode arrangement into one, It is preferable to reduce manufacturing costs and increase process efficiency by applying a multifaceted process of cutting the original plate of the plasma display panel into a plurality of plasma display panels. At this time, in the cutout portion 151 of the original plate of the plasma display panel for cutting the plasma display panel, even if the partition wall is bonded to the rear panel, the adhesive force is not sufficient, the adhesion between the partition wall and the rear panel is separated, The likelihood of cracks or the like in the partition walls increases, and when used to display the discharge cells of the cutout portion, a non-uniform image is expressed at the cutout portion, thereby degrading the quality of the plasma display panel. In order to overcome this problem, as shown in FIG. 4, the plasma display panel 100 is positioned in the cutout 151 in addition to the display area 190 displaying the original image, so that uneven discharge may occur in the manufacturing process. The protection area 150 is provided separately. The protection region has an internal structure in which discharge may occur to additionally display an image, but it is generally not visible to a case (not shown) from the viewpoint of the viewer viewing the plasma display panel. The protective barrier wall 150 disposed in the protective area receives a strong physical force when the multi-faceted method is applied, and when the protective barrier wall is not firmly bonded to the rear panel of the plasma display panel, the protective barrier wall is dropped. When the plasma display panel is driven, bumps and lifts occur, and a protective barrier having the bumps and lifts is severely shaken by the shock wave generated in the discharge cell, thereby periodically protecting the rear panel. Strikes a loud noise.

  The plasma display panel 100 according to the first embodiment of the present invention which solves the above-described problem will be described with reference to FIG. 5. 5 shows a general structure of an alternating current 3-electrode surface discharge plasma display panel. The plasma display panel 100 includes a front panel 110 and a rear panel 120. The front panel 110 includes a front electrode 111, a pair of sustain electrodes 114 including a Y electrode 112 and an X electrode 113, which are part of a discharge electrode formed on the rear surface 111a of the front substrate, A front dielectric layer 115 covering the sustain electrode pairs and a passivation layer 116 covering the front dielectric layer are provided. The front dielectric layer induces charged particles by the voltage applied to the sustain electrode pair to induce wall charge for discharging, and the protective layer facilitates discharging by increasing the emission of secondary electrons during discharging, and the front dielectric layer And sustain electrode pairs to protect the plasma display panel. Each of the Y electrode 112 and the X electrode 113 includes transparent electrodes 112b and 113b formed of ITO or the like for transmitting visible light. The transparent electrode is generally not used alone due to its high resistance. Bus electrodes 112a and 113a formed of a metal having conductivity are provided. In general, a predetermined voltage is applied by the bus electrode, and a discharge occurs in the transparent electrode. The bus electrodes 112a and 113a are connected to a connection cable (not shown) disposed on the left and right sides of the plasma display panel 100.

The rear panel 120 is an address electrode 122 which is another part of the discharge electrode formed on the rear substrate 121 and the front electrode 121a of the rear substrate 121 to intersect the sustain electrode pair 114 which is a part of the discharge electrode. ) And a rear dielectric layer 123 covering the address electrodes. The address electrode functions to cause an address discharge to select a discharge cell to display an image when driving the plasma display panel, and the rear dielectric layer induces charged particles when a predetermined voltage is applied to the address electrode and wall charges. Is generated so that the discharge cell can be selected after the address discharge has occurred, but is not necessarily an essential structure. In addition, the rear panel is disposed on the rear dielectric layer 123 of the display area 190 for displaying the screen of the plasma display panel, and the display partition partition 124 defining the discharge cell 126, the discharge of the plasma display panel A protective barrier 124a formed on the rear dielectric layer of the protective region 150 formed in consideration of nonuniformity, formed on the adhesive means 127 and defining a discharge cell 126. Equipped. In this case, when the rear dielectric layer 123 is not disposed, the bonding means 127 is disposed between the protective partition wall and the rear substrate. On the other hand, when the protective barrier is manufactured as in the manufacture of the front panel, the bonding means may be interposed between the protective barrier and any layer disposed on the front substrate. On the other hand, the partition wall is a discharge cell for realizing an image by applying a predetermined voltage to the plasma display panel, the plasma discharge is generated by the collision of the discharge gas particles and the charge induced by the electric field induced by the voltage to emit light ( 126 to form a basic unit of an image, and prevent cross talk between discharge cells. In addition, the discharge cell is filled with a discharge gas (approximately 0.5 atm or less) of a vacuum lower than atmospheric pressure, and the partition wall supports the pressure generated between the front panel and the rear panel. The discharge gas is filled with a discharge gas composed of any one of neon, helium (He), argon (Ar), or a mixture of two or more of these, including 10% xenon (Xe) gas. The relationship between the partition and the bonding means will be described later.

On the other hand, the phosphor layer 125 is disposed in the discharge cell. In this case, in order to enable the plasma display panel to realize a color image, red, green, and blue light emitting phosphor layers may be disposed in a discharge cell to form a unit pixel. The phosphor layer is dried and calcined after a phosphor paste in which any one of a phosphor, a solvent, and a binder of a red light emitting phosphor, a green light emitting phosphor, and a blue light emitting phosphor is mixed is applied to a part of the front side and the partition wall side of the rear dielectric layer in the discharge cell. It is formed by going through a process. Examples of the red light emitting phosphor include (Y, Gd) BO ₃ : Eu ³⁺ , and examples of the green light emitting phosphor include Zn ₂ Si0 ₄ : Mn ²⁺ , and examples of the blue light emitting phosphor include BaMgAl ₁₀ O ₁₇ : Eu ²⁺ . have. The address electrodes 122 are connected to connection cables (not shown) disposed above and below the plasma display panel.

In general, the barrier ribs 124 and 124a are formed by applying a barrier material made of a glass powder, an organic vehicle, and a paste having various fillers onto the rear dielectric layer by a screen printing method, and then patterning a predetermined pattern. And a calcination process. On the other hand, the patterning process may be made of a variety of processes, such as sandblasting, etching, laser etching, exposure method. The sandblasting method will be described later.

At this time, when the bulge and lifting phenomenon of the partition wall, which occurs when the plurality of plasma display panels are manufactured by cutting the original plate 300 of the plasma display panel by applying a multi-faceting process, as described above, Due to the shock caused by the shock wave, the protective partition vibrates strongly at a frequency similar to that of the discharge, and the protective partition repeatedly impacts the rear dielectric layer, etc., thereby generating a large noise in the protective area. In addition, when the vibration is continued, cracks generated in the adhesive portion between the protective barrier rib and the rear dielectric layer may increase, and the crack may extend to the display barrier rib of the display area. This makes the image of the plasma display panel non-uniform and shortens its lifespan.

In order to solve this problem, it is necessary to ensure that the protective barrier in the protective region is firmly adhered to the rear dielectric layer so that the barrier does not fall out by a multi-faceted process applicable in the manufacture of the plasma display panel, and thus the cost is low. In addition, the highly efficient multi-sided odor process can be applied efficiently.

In order to solve this problem, an adhesive means 127 is inserted between the protective barrier and the rear dielectric layer so that the protective barrier can be firmly coupled to the rear dielectric layer. In this case, a frit used to attach the panel may be effective. The frit applies the frit on the rear dielectric layer of the protective region before applying the partition material on the rear substrate, and then, after the partition material is applied and patterned, and then fired, the partition material of the partition material Binders, the frit, and the rear dielectric layer are fused so that the protective barrier is firmly fixed on the rear dielectric layer. On the other hand, as the adhesive means may be used a material having other adhesive strength such as an adhesive binder other than frit, the adhesive means is not limited to frit.

FIG. 6A shows a cross section of the protective region, and the bonding means 127 is located between the rear dielectric layer 123 and the protective partition 124a. FIG. 6B shows a cross section of the display region. There is no adhesive means between the rear dielectric layer 123 and the partition wall 124 of the display area. However, since the bonding means is disposed between the rear dielectric layer and the protective partition, the bumps and the lifting phenomenon generally appear in the protective partition, so that the noise is generated in the protection area. The means is not necessarily limited to the protection region, but rather, when the dielectric is uniformly applied between the rear dielectric layer and the display partition wall of the display area, the partition wall is more firmly formed on the rear dielectric layer to increase the lifetime of the plasma display panel. have.

A variation of the present invention will now be described with reference to FIG. 7, focusing on differences from the first embodiment of the present invention. FIG. 7 illustrates a process of manufacturing the rear panel 110 of a single plasma display panel by sandblasting without applying the multifaceted method to the rear panel of the plasma display panel of the present invention. The sand blasting method will be briefly described. In order to pattern the partition walls 124 and 124a on the rear panel of the plasma display panel, the partition wall paste 130 is applied to the rear dielectric layer 123 in a thin layer, and the partition wall material A predetermined pattern 131 is formed on the paste shape 130a, and sand of fine particles is sprayed by the injector 170 to remove the partition wall where the pattern is not formed, thereby patterning the partition wall. When the partition wall is formed by the sandblasting method, even when the plasma display panel is manufactured without applying the multi-faceted method described above, bumps and lifting of the partition wall may occur during sand particle impact on the partition wall. This is frequently observed, especially in the protective partition 124a present at the edge of the plasma display panel. Of course, in the multi-sided method, the sandblasting method may be used when manufacturing the rear panel, but it is pointed out that the raised and lifted phenomenon occurs even when the multi-sided method is not applied. In order to solve this problem, as shown in FIG. 7, the barrier rib is firmly adhered to the rear dielectric layer through an adhesive means between the barrier rib and the rear dielectric layer, thereby reducing the noise generation and the life span of the plasma display panel. You can prevent it.

On the other hand, in the modified example of the first embodiment and the first embodiment of the present invention has been described that the application of the adhesive means to solve the rise and lift phenomenon occurs in the partition wall by the multi-faceted method and sandblasting method, but The invention is not limited to the plasma display panel to which the above-described multi-faceted method and the sandblasting method are applied, and can be applied to any plasma display panel to which other partition walls are firmly fixed and bonded.

A second embodiment of the present invention will be described with reference to FIG. 8, focusing on different matters from the first embodiment of the present invention. In the present invention, the partitions 424 and 424a are arranged in a stripe shape on the rear panel. As shown in FIG. 8, even when the barrier ribs are formed in a stripe shape on the rear panel, when the multi-faceted method is applied, the bumps may be formed on the protective barrier ribs disposed in the protection area formed at the cutout (not shown) of the original plate of the plasma display panel. This may happen, even if the sandblasting method is applied without applying the multifaceted method. Therefore, it is preferable that the adhesion means 127 is interposed between the protective partition 424a and the rear dielectric layer 123. Of course, when there is no rear dielectric layer, the bonding means 127 is interposed between the protective partition 424a and the rear substrate 121. In addition, the adhesion means 127 is not limited to the protective barrier, but may be interposed between the barrier 424 and the rear substrate 121 or the rear dielectric layer 123.

A third embodiment of the present invention will be described with reference to FIG. 9 based on the matters different from the first embodiment of the present invention.

The plasma display panel 500 illustrated in FIG. 9 includes a front panel 510 and a rear panel 520, the front panel having a transparent front substrate 111, and the rear panel 520 of the front panel. The rear substrate 121 is disposed to be parallel to the substrate.

The rear panel 520 is disposed on the rear substrate and has an address electrode 522 crossing the discharge cells, a dielectric layer 523 covering the address electrode 522 and disposed on the rear substrate, and the dielectric layer 523. Barrier ribs 524 formed on a dielectric material and defining discharge cells 526 together with the front substrate 111 and the rear substrate 121 and formed on at least a portion of the upper surface, in particular, the bonding means 127 disposed in the protective region, and the discharge. The front discharge electrode 513 and the rear discharge electrode 512 are disposed in the partition wall 524 to surround the cell 526 and are spaced apart from each other, and intersect the address electrode and extend in parallel in one direction. The discharge electrodes 519 are provided, a passivation layer 516 covering the side surface 524g of the partition wall, which may be formed as necessary, and a phosphor layer 125 disposed in the discharge cell.

On the other hand, the address electrode is not necessarily required, and if there is no address electrode, the front discharge electrode and the rear discharge electrode are arranged to cross, and the address discharge to select a discharge cell between the front discharge electrode and the rear discharge electrode and A sustain discharge for displaying an image occurs.

On the other hand, the partition 524 is not necessarily present on the rear substrate, the partition is separated into a front partition and a rear partition (not shown), the front partition is on the front substrate, the rear partition is on the rear substrate. When formed and attached to the front substrate and the rear substrate may be coupled to each other. Meanwhile, the adhesive means may be interposed between the front substrate and the front partition wall.

The front panel 510 and the rear panel 520 are combined and sealed by a coupling member such as a frit (not shown), and neon including 10% xenon (Xe) gas in the discharge cell. Discharge gas consisting of any one of (Ne), helium (He), or argon (Ar) or a mixed gas of two or more thereof is filled.

The front substrate 111 and the rear substrate 121 are generally formed of glass, and the front substrate is preferably formed of a material having high light transmittance.

The discharge electrodes 519 including the front discharge electrode 513 and the rear discharge electrode 512 may use a relatively high resistance ITO electrode in order to increase light transmittance in a conventional AC three-electrode surface discharge plasma display panel. Unlike use, it is possible to select a material of the electrode without considering light transmittance, and Ag, Cu, or the like having high electrical conductivity is preferably used.

In FIG. 9, the partition wall 524 divides the discharge cells 526 into a matrix, but is not limited thereto, and may be partitioned into various shapes such as a honeycomb form and a delta form. In addition, although the cross section of the discharge cell is illustrated in FIG. 9 as being rectangular, the present invention is not limited thereto and may be a polygon such as a triangle or a pentagon, or a circle or an ellipse.

Meanwhile, in FIG. 9, the partition wall is formed on the dielectric layer in front of the rear substrate, but is not limited thereto, and the front part of the partition wall on which the front discharge electrode and the rear discharge electrode are disposed is disposed on the rear surface of the front substrate. A rear portion of the barrier rib may be disposed on the front surface of the dielectric layer, a phosphor layer may be disposed in a discharge cell defined by the rear portion of the barrier rib, and the front panel and the rear panel may be coupled to form a barrier rib.

On the other hand, in the present invention, as described above, a plasma display panel having an alternating current three-electrode surface discharge structure and a plasma display panel having a structure in which the front discharge electrode and the rear discharge electrode surround the discharge cells are described. Although the present invention is applied, the present invention is not limited to the plasma display panel having such a structure, and may be applied to all of the plasma display panels in which noise is generated or the life is shortened due to the bumps and the lifting of the partition wall in other manufacturing processes.

According to the present invention, the partition wall of the plasma display panel can be firmly adhered to and fixed to the rear panel, thereby reducing noise generated when the plasma display panel is driven by rising and lifting of the partition wall, and extending the life of the plasma display panel. In addition, the product value of the plasma display panel can be increased.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

Claims (11)

Spaced apart from each other and disposed to face each other, the front substrate and the rear substrate of which edges are sealed; Barrier ribs disposed between the front substrate and the rear substrate to define a plurality of discharge cells; And And an adhesive means disposed between one of the front substrate and the rear substrate and the partition wall, or between the front substrate and the rear substrate and the partition wall. The method of claim 1, The barrier ribs may include: display partition barriers defining discharge cells of a display area displaying an image together with the front substrate and the rear substrate;  And a protective partition wall disposed around the front substrate and the rear substrate. The method of claim 2, And the adhesive means is disposed between one of the front substrate and the rear substrate and the protective partition wall, or between the front substrate and the rear substrate and the protective partition wall. The method of claim 1 And the barrier ribs are arranged in a matrix. The method of claim 1 And the barrier ribs are arranged in a stripe shape. The method of claim 1, And a dielectric layer disposed between the barrier ribs and the back substrate, and the bonding means disposed on a portion or all of the barrier ribs and the dielectric layer. The method of claim 1, And said adhering means is a frit layer. The method of claim 7, wherein And the barrier ribs and the frit layer are bonded by a firing process. The method of claim 1, And the barrier ribs are manufactured by sandblasting. The method of claim 1, The plasma display panel, At least one discharge electrode disposed on a rear surface of the front substrate; A front dielectric layer formed on the front substrate to cover the discharge electrode; Address electrodes disposed on a front surface of the rear substrate and having a portion crossing the discharge electrode in the discharge cell; A rear dielectric layer formed on the rear substrate to cover the address electrodes; A phosphor layer disposed in the discharge cell; And And a discharge gas existing in the discharge cell. The method of claim 1, The plasma display panel, At least one discharge electrode formed of a dielectric and surrounding the discharge cell in the partition; A phosphor layer disposed in the discharge cell; And And a discharge gas charged in the discharge cell.

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