KR100634687B1 - Plasma Display Panel - Google Patents

Abstract

The present invention relates to a plasma display panel.

The present invention is coupled to the front glass substrate and the rear glass substrate at a predetermined interval, the front glass substrate includes a groove formed in the plasma non-discharge region of the inner side and the getter formed inside the groove, the rear glass substrate is the front surface And a getter inlet facing the groove of the glass substrate.

In addition, the present invention comprises the step of forming a panel by bonding a front glass substrate having one or more grooves formed in the plasma non-discharge area of the side in the (a) and a rear glass substrate having a getter inlet formed to face the one or more grooves, (b) ) Forming a getter in the groove of the front glass substrate by inserting a getter into the getter inlet of the rear glass substrate, (c) sealing the getter inlet of the rear glass substrate, and (d) impurities inside the panel. Exhausting the gas, and (e) injecting a discharge gas into the panel.

Description

Plasma Display Panel

1 is a perspective view schematically showing a structure of a conventional AC type PDP device.

2 is a view showing a stripe type getter installed in a conventional PDP.

Figure 3 is a view showing a step of forming a stripe type getter during conventional PDP fabrication.

4 is a schematic exploded perspective view of a PDP according to the present invention;

5 is a process chart for explaining a first manufacturing method of a plasma display panel according to the present invention;

6 is a process chart for explaining a second manufacturing method of the plasma display panel according to the present invention;

***** Explanation of symbols for the main parts of the drawing *****

100: front substrate 110, 120: sustain electrode

130a: upper dielectric layer 140: protective layer

150: home 160: getter

170: exhaust pipe 200: rear substrate

210: bulkhead 230: getter inlet

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel capable of increasing the active efficiency of a getter formed to remove impurities in the interior of the plasma display panel manufacturing process.

In general, a plasma display panel (hereinafter referred to as a PDP) is applied with an alternating current (DC) or a direct current (AC) voltage to an electrode, and a gas discharge occurs between the electrodes. At this time, the phosphor by ultraviolet radiation emits light. To display an image.

1 is a perspective view schematically showing a structure of a conventional AC type PDP device. As shown in the figure, the PDP is coupled in parallel with the front glass substrate 10 which is the display surface on which the image is displayed and the rear glass substrate 20 which forms the rear surface with a predetermined distance therebetween.

The front glass substrate 10 is made of a metal material and sustain electrodes 11 and 12 for maintaining light emission of cells by mutual discharge in one pixel below, that is, transparent electrodes 11a and 12a made of a transparent ITO material. The sustain electrodes 11 and 12 provided with the bus electrodes 11b and 12b are formed in pairs. The sustain electrodes 11 and 12 form a wall charge, are maintained by the discharge sustain voltage, and are covered by the upper dielectric layer 13a which protects the electrode from ion shock during plasma discharge and serves as a diffusion barrier. On the upper dielectric layer 13a, a protective layer 14 on which magnesium oxide (MgO) is deposited is formed to facilitate discharge conditions.

In the rear glass substrate 20, a plurality of discharge spaces, that is, stripe-type partition walls 21 for forming a cell are arranged in parallel with each other and an address discharge is performed at a portion that intersects with the sustain electrode 11. A plurality of address electrodes 22 are generated in parallel to the partition wall 21. In addition, a lower dielectric layer 13b is formed on an upper surface of the address electrode 22, and an upper surface of the lower dielectric layer 13 is formed by applying R, G, and B fluorescent layers 23 that emit visible light for image display during address discharge. do.

A conventional front glass substrate and a rear glass substrate having such a structure are sealed by frit glass to form a PDP, and in order to increase discharge efficiency during plasma discharge inside the PDP, helium (He), neon (Ne), xenon (Xe), and the like. The same inert gas is injected.

Meanwhile, referring to a process of injecting an inert gas into the PDP, first, an exhaust hole is formed in the front glass substrate or the rear glass substrate of the PDP to forcibly exhaust the impurity gas present therein, and in the state having a constant degree of vacuum. One inert gas is injected. At this time, when an inert gas is injected while the impurity gas or air present in the PDP is not sufficiently exhausted, a large amount of impurity gas such as H ₂ O, H ₂ , O ₂ , CO, CO _2, etc. is present, and the PDP is driven. Discharge start voltage characteristics, drive voltage characteristics, and luminance characteristics are adversely affected.

Therefore, a non-diffusion getter is formed in the PDP in order to remove the impurity gas generated in these exhaust processes and other various processes. The non-diffusion getter is divided into a fill type and a strip type according to its shape, and generally a strip type getter is mainly used.

2 is a diagram showing a strip type getter installed in a conventional PDP. Referring to FIG. 2, the strip type getter 25 is formed on the inner surface of the PDP rear glass substrate 20, and the installed position is formed in the non-discharge region in which plasma discharge is not generated during PDP driving. The strip type getter 25 is formed by depositing a thin layer of getter material 25b on a base metal 25a to a thickness of about 120 μm, which is a front glass substrate and a rear surface of a PDP. This is because the size of the partition wall formed between the glass substrates is limited. In general, the size of the partition wall formed on the rear glass substrate is about 120㎛.

Therefore, since a getter material that is not sufficient for the base metal having a certain thickness is not formed on the base metal, there is a problem that the impurity gas due to the getter material activity cannot be sufficiently removed.

3 is a view illustrating a step in which a strip type getter is formed when a conventional PDP is manufactured. Referring to Figure 3, the strip type getter is formed on the inner surface of the PDP rear glass substrate before the bonding process for sealing the front glass substrate and the rear glass substrate during the PDP manufacturing process. This strip type getter is activated during the bonding process, and thus, there is a problem in that it is not possible to remove the impurity gas generated during the exhaust process and the gas injection to be performed in the future. This brings about a problem of lowering voltage characteristics and luminance characteristics.

Accordingly, an object of the present invention is to provide a plasma display panel capable of sufficiently removing impurity gas generated during a PDP manufacturing process and a manufacturing method thereof.

Plasma display panel of the present invention for achieving the above object is a front glass substrate and a rear glass substrate is coupled, the front glass substrate includes a groove formed in the plasma non-discharge region of the inner side, the getter formed inside the groove The rear glass substrate may include a getter inlet facing a groove of the front glass substrate.

The front glass substrate has a plurality of grooves, and in this case, the shape of the grooves is preferably the same as the getter shape formed therein.

In addition, the depth of the groove formed on the front glass substrate is made of 300㎛ ~ 500㎛.

The thickness of the getter formed inside the groove is greater than the height of the partition wall formed on the rear glass substrate.

In addition, the getter may be made of a fill type, but preferably made of a strip type.

Meanwhile, in the first manufacturing method of the plasma display panel of the present invention, (a) a front glass substrate having one or more grooves and a rear glass substrate having a getter inlet facing the one or more grooves are bonded to the plasma non-discharge region on the side surface. Forming a panel; (b) inserting a getter into a getter inlet of the rear glass substrate to form the getter in a groove of the front glass substrate, and (c) sealing a getter inlet of the rear glass substrate (d) evacuating the impurity gas inside the panel, and (e) injecting a discharge gas into the panel.

The sealing of the getter inlet (c) is performed by heating and melting the same glass rod as the material of the rear glass substrate.

In addition, the second manufacturing method of the plasma display panel of the present invention comprises the steps of: (a) forming at least one groove in a plasma non-discharge area on the side of the front glass substrate to a predetermined depth; (b) forming a getter in the groove; (C) bonding the front glass substrate and the rear glass substrate having the getter formed in the groove to form a panel, (d) exhausting the impurity gas in the panel, and (e) discharging the panel Injecting gas.

The getters used in the first and second manufacturing methods of the plasma display panel are preferably of the strip type.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

4 is a schematic exploded perspective view of a PDP according to the present invention. Referring to FIG. 4, in the PDP of the present invention, the front glass substrate 100 and the rear glass substrate 200 on which an image is displayed are coupled in parallel by a fleet glass (not shown) with a predetermined distance therebetween.

The front glass substrate 100 is made of a metal material and a sustain electrode (110,120) for maintaining the light emission of the cell by mutual discharge in one pixel below, that is, a transparent electrode (110a, 120a) formed of a transparent ITO material The sustain electrodes 110 and 120 provided as the bus electrodes 110b and 120b are formed in pairs. The sustain electrodes 110 and 120 form a wall charge, are maintained by the discharge sustain voltage, and are covered by the upper dielectric layer 130a which protects the electrode from ion shock during plasma discharge and serves as a diffusion barrier. A protective layer 140 on which magnesium oxide (MgO) is deposited is formed on the top surface of the dielectric layer 130a to facilitate discharge conditions. In addition, a plurality of grooves 150 are formed in the outer portion of the front glass substrate, that is, in the plasma non-discharge region A in which the sustain electrode is not formed, and a getter for removing impurity gas in the grooves 150. 160 is formed.

The groove 150 formed on the side surface of the front glass substrate may be formed in the same shape as the getter 160 so that the getter is not separated from the groove. In this case, the getter 160 may use a getter of a fill type according to the depth of the groove 150, but may be inserted into a groove formed at a predetermined depth in consideration of the structural strength of the front glass substrate. Strip type getters are suitable.

The depth D of the groove formed on the front glass substrate is about 300 μm to 500 μm.

The thickness t1 of the getter formed in the groove 150 is greater than the height of the partition wall t2 formed on the rear glass substrate 200 to be described later. This means that a getter material of a strip type getter material is formed to a thickness thicker than the prior art on a base metal having a constant thickness.

Therefore, a strip type getter made of a getter material formed on a large amount of base metal can sufficiently remove the impurity gas generated during the PDP manufacturing process.

In the rear glass substrate 200, a plurality of discharge spaces, that is, stripe-type barrier ribs 210 for forming cells are arranged to be parallel to each other, and an address discharge is performed at a portion that intersects with the sustain electrodes 110 and 120. A plurality of address electrodes (not shown), which generate s, are disposed in parallel to the partition wall 210. In addition, a lower dielectric layer (not shown) is formed on an upper surface of the address electrode, and a lower dielectric layer (not shown) is formed on an upper surface of the lower dielectric layer by applying R, G, and B fluorescent layers (not shown) that emit visible light for image display. .

As described above, the plasma display panel of the present invention is formed by combining the front glass substrate and the rear glass substrate having the above structure at regular intervals. However, in some cases, a getter inlet is formed in the rear glass substrate 200 facing the position of the groove formed in the front glass substrate. This getter inlet is sealed by melting a glass rod with a hydrogen torch, as in the first manufacturing method of the plasma display panel according to the present invention.

5 is a flowchart illustrating a first manufacturing method of a plasma display panel according to the present invention. First, although not shown in the drawing, a front glass substrate on which a plurality of sustain electrodes are formed and a back glass substrate on which a plurality of address electrodes are formed are manufactured.

Thereafter, as illustrated in FIG. 5A, at least one groove 150 is formed in the plasma non-discharge region of the front glass substrate 100, and the groove of the front glass substrate is formed in the rear glass substrate 200. A getter inlet 230 is formed at a position opposite to 150. At this time, the groove 150 is a getter room in which the getter is inserted and seated. The groove 150 is formed by a sandblasting method, and has a depth of about 300 μm to 500 μm. In addition, when the getter inlet 230 is based on a strip type getter having a length of 10 cm and a width of 1 cm, the width of the inlet is formed to be 1 mm or less and the length is about 1.5 to 2 cm.

Thereafter, as shown in FIG. 5 (b), the panel is formed by bonding the front glass substrate 100 and the rear glass substrate 200 to each other, and then the getter 160 is provided at the getter inlet 230 of the rear glass substrate. When inputting, the getter 160 is fixed to the groove 150 of the front glass substrate facing the getter inlet. At this time, an exhaust pipe 170 for exhausting the impurity gas inside the panel and injecting the discharge gas is formed on one side of the rear glass substrate.

Thereafter, as shown in FIG. 5C, the getter inlet 230 of the rear glass substrate 200 is sealed. In detail, the getter inlet 230 is sealed by heating and melting the same glass rod 250 as the material of the rear glass substrate with a hydrogen torch 240.

Thereafter, as illustrated in (d) of FIG. 5, after exhausting and discharging the impurity gas in the panel through the exhaust pipe 170 formed on the rear glass substrate, the tip of the exhaust pipe is turned off. The PDP is complete.

The PDP of the present invention manufactured by the above method is equipped with a getter in a groove which is a getter room of the front glass substrate after the bonding process of the front and rear glass substrates, thereby preventing impurity gas generated in the exhaust process and other processes to be performed. It can be removed efficiently.

In addition, it is possible to form thicker than the conventional strip type getter by the depth of the groove formed in the front glass substrate, and thus sufficient getter material can be deposited on the base metal forming the getter, so that the impurity gas in the panel can be reduced. It can be removed more efficiently.

6 is a process chart for explaining a second manufacturing method of the plasma display panel according to the present invention. First, as shown in FIG. 5, a front glass substrate on which a plurality of sustain electrodes are formed, but a rear glass substrate on which a plurality of address electrodes are formed separately is manufactured.

Thereafter, as shown in FIG. 6A, a plurality of grooves 150 are formed at a predetermined depth in the plasma non-discharge region of the front glass substrate 100. At this time, the groove 150 is a getter room in which the getter is inserted and seated, and is formed by a sandblasting method or the like.

Thereafter, as shown in FIG. 6B, a getter 160 is inserted into and formed in the groove of the front glass substrate. Of course, the getter may insert the getter of the peel type according to the depth of the groove, but considering the structure of the groove, it is appropriate to form the getter of the strip type by inserting the getter.

Thereafter, as shown in (c) of FIG. 6, the front glass substrate 100 and the rear glass substrate 200 are joined to form a panel, and as shown in FIG. 170 is installed to exhaust the impurity gas and the discharge gas inside the panel, and then tip off the exhaust pipe to complete the PDP.

The PDP of the present invention manufactured by the above method can be formed thicker than the conventional strip type getter by the depth of the groove formed in the front glass substrate. This allows sufficient getter material to be deposited on the base metal to remove the impurity gas in the panel.

Therefore, even if the getter is formed before the front and rear glass substrate bonding process, the getter material is activated during the front and rear glass substrate bonding process, and is activated in the remaining exhaust and other processes to sufficiently remove the impurity gas inside the panel. do.

As described above, it will be understood by those skilled in the art that the above-described technical configuration may be implemented in other specific forms without changing the technical spirit or essential features of the present invention. 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.

As described above, the present invention has the effect of efficiently removing the impurity gas present in the PDP by modifying the structure of the front glass so that a getter capable of depositing more getter materials is installed inside the PDP. have.

In addition, by modifying the rear glass structure to control the conventional getter installation step, the getter is activated at an appropriate time, thereby effectively removing the impurity gas inside the PDP.

Claims (6)

In the plasma display panel is coupled to the front glass substrate and the rear glass substrate at a predetermined interval, The front glass substrate is A groove formed in the plasma non-discharge region on the inner side; It includes a getter formed inside the groove, The rear glass substrate is Getter inlet facing the groove of the front glass substrate Plasma display panel comprising a. The method of claim 1, And a plurality of grooves. The method according to claim 1 or 2, And a depth of the groove is 300 µm to 500 µm. The method of claim 1, The thickness of the getter is greater than the height of the partition wall formed on the back glass substrate plasma display panel. The method according to claim 1 or 4, And the getter is of a strip type. The method of claim 1, The getter inlet is a plasma display panel, characterized in that the glass rod is melted and sealed.

Images