KR100634685B1 - Plasma Display Panel and Manufacturing Method thereof - Google Patents

Abstract

The present invention relates to a plasma display panel and a method of manufacturing the same.

Such a plasma display panel of the present invention includes a getter disposed to remove impurity gas in the space between the front panel and the rear panel, which is bonded with a predetermined seal material, and a heating element that heats for activation of the getter. do.

In addition, the manufacturing method of the plasma display panel according to the present invention comprises the steps of (a) disposing a getter including a heating element between the front panel and the rear panel, (b) the front panel and the rear panel is a predetermined seal ( (C) injecting exhaust and discharge gas through an exhaust hole formed in at least one of the front panel and the rear panel, and (d) heating the heating element to activate the getter. Include.

Description

Plasma display panel and manufacturing method thereof

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

2 is a view illustrating a phenomenon occurring when a powder type getter is injected into a conventional plasma display panel.

3 is a view illustrating a fill type getter installed in a conventional plasma display panel.

4 is a view for explaining a process of forming a fill type getter during a conventional plasma display panel manufacturing process.

FIG. 5 illustrates a strip type getter installed in a conventional plasma display panel. FIG.

FIG. 6 illustrates a process of forming a getter of a strip type when fabricating a conventional plasma display panel.

7 is a plan view showing a plasma display panel in which a getter is inserted according to the present invention;

8 is a sectional view showing a getter of the plasma display panel according to the present invention;

9 is a block diagram sequentially illustrating a method of manufacturing a plasma display panel according to the present invention;

10 is a view showing a process of activating the getter of the plasma display panel according to the present invention.

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

700: invalid surface of panel 710: getter

720: heating element 730: external power

740: exhaust hole

The present invention relates to a plasma display panel and a method of manufacturing the same, and more particularly, to a plasma display panel having a heating element provided in the getter for removing impurity gas therein during the plasma display panel manufacturing process.

In general, a plasma display panel is a partition wall formed between a front panel and a rear panel to form one unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He). An inert gas containing a main discharge gas such as and a small amount of xenon is 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 shown 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 glass 101 that is a display surface on which an image is displayed. The rear panel 110 on which the plurality of address electrodes 113 are arranged so as to intersect the plurality of sustain electrode pairs on the back glass 111 forming the back surface 100 and the rear surface is coupled in parallel with a predetermined distance therebetween. .

The front panel 100 includes a scan electrode 102 and a sustain electrode 103 for mutually discharging and maintaining light emission of the cells in one discharge cell, that is, transparent electrodes a and silver Ag formed of a transparent material. The scan electrode 102 and the sustain electrode 103 provided as a bus electrode b made of a metal material are included in pairs. The scan electrode 102 and the sustain electrode 103 are covered by a dielectric layer 104 which limits the discharge current and insulates the electrode pairs, and the upper surface of the upper dielectric layer 104 is made of magnesium oxide to facilitate discharge conditions. A protective layer 105 on which MgO) is deposited is formed.

The rear panel 110 is arranged in such a manner that a plurality of discharge spaces, that is, stripe-type partitions 112 for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 113 which perform address discharge to generate vacuum ultraviolet rays are arranged in parallel with the partition wall 112. On the upper side of the rear panel 110, R, G, and B phosphors 114 which emit visible light for image display during address 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.

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

Meanwhile, referring to the process of injecting the inert gas into the plasma display panel, first, an exhaust hole is formed in the front panel or the rear panel of the plasma display panel to forcibly exhaust the impurity gas existing therein, and in a state of having a constant vacuum degree. The above inert gas is injected. At this time, when impurity gas or air present in the plasma display panel is not sufficiently exhausted, inert gas is injected, and impurity gases such as H ₂ O, H ₂ , O ₂ , CO, CO _2, etc. are present in a large amount. In addition, when the plasma display panel is driven, the discharge start voltage characteristics, the driving voltage characteristics, and the luminance characteristics for the discharge start are adversely affected.

Therefore, in order to remove the impurity gas generated in such an exhaust process and various other processes, a powder type getter is formed in the plasma display panel before being formed into a non-diffusion getter and a non-diffusion getter.

First, when looking at the powder type (Powder Type) getter, the conventional powder getter has a very high reactivity, causing a violent reaction to a small external shock and the explosion is likely to be used. Recently, however, powder type getters have been developed to control exothermic and endothermic reactions to reduce the risk of explosion in the reaction and to maintain the getter performance of impurity gas adsorption.

The powder type getter can be inserted through the exhaust hole after the plasma display panel bonding process, so that the getter is not likely to be damaged. Moreover, the getter has a large surface area, which provides the greatest efficiency in adsorption of impure gas. It also has several problems.

FIG. 2 is a diagram illustrating a phenomenon occurring when a powder type getter is injected into a conventional plasma display panel.

As shown in FIG. 2, when the plasma display panel is bonded through the exhaust hole after the plasma display panel bonding process, the powder may not be injected into the plasma display panel anymore due to the friction between the powder and the friction between the powder and the front and rear panels. There is a problem that results in insufficient performance.

On the other hand, the non-diffusion getter is divided into a fill type and a strip type according to its shape.

In general, since the getter of the fill type cannot be mounted inside the panel because of its large size, a getter room is formed outside the panel as shown in FIG. 3 and the getter is inserted into the getter room.

3 illustrates a fill type getter installed in a conventional plasma display panel.

Referring to FIG. 3, the conventional plasma display panel is provided with a glass getter room 330 for mounting the getter 320 in addition to the exhaust pipe 310 for evacuating the inside of the panel, and the getter room 330 in the getter room 330. 320 is inserted to adsorb and remove impurity gas generated in a predetermined process such as an exhaust process during a plasma display panel manufacturing process.

These getters are inserted into a getter room formed in a predetermined number according to each size model of the plasma display panel and mounted on the plasma display panel. In general, about four getters are mounted on the plasma display panel of the 42 "inch model.

FIG. 4 illustrates a process of forming a fill type getter during a conventional plasma display panel manufacturing process.

Looking at the getter forming process with reference to Figure 4, first, a bonding process is performed in which the front panel and the rear panel is sealed by a material such as frit glass. At this time, in order to inject a constant vacuum state and inert gas into the inside of the plasma display panel, an exhaust hole is installed in one of the front and rear panels, and a glass getter room such as an exhaust hole is installed in the rear panel.

Thereafter, after inserting the getter into the getter room, the tip is turned off by applying heat, and the exhaust process is performed by applying heat to maintain a predetermined degree of vacuum inside the plasma display panel using an exhaust hole provided in the rear panel. Do it. At this time, the getter formed in the getter room is activated by the heated heat during the exhaust process to adsorb the impurity gas present therein.

Thereafter, an inert gas is injected into the plasma display panel through the exhaust hole, and then the exhaust hole is tip-off.

On the other hand, as described above, the fill type getter installed in the plasma display panel may improve the plasma display panel characteristics by removing impurity gas existing inside the panel, but requires a getter room installation process for forming the getter. As a result, the production yield is reduced, thereby increasing the cost of manufacturing the plasma display panel.

In addition, the getter room is a structure protruding to the rear of the panel, and this structure also makes it difficult to install a mechanical part such as a heat sink on the rear of the plasma display panel, and the design is to be designed in consideration of the getter room protruding from the driving circuit board. There is a problem that receives a lot of restrictions.

In addition, the getter room is made of a glass material and has a high possibility of being damaged during the modular operation of installing a heat sink and a driving circuit board after fabricating the plasma display panel.

5 illustrates a strip type getter installed in a conventional plasma display panel.

As shown in FIG. 5, the getter 510 of the conventional strip type is installed inside the plasma display panel in the form of a thin plate having a thickness smaller than the distance between the front panel and the rear panel, and the installation position is plasma When the display panel is driven, the plasma panel is formed in the non-discharge region where plasma discharge does not occur so that the external shape of the plasma display panel is not changed.

Therefore, the strip type getter has an advantage of not causing a change in the shape of the plasma display panel generated when the above-described fill type getter is mounted.

However, the getter of the strip type has a problem that the getter is activated and damaged during the plasma display panel manufacturing process as shown in FIG. 6.

6 illustrates a process of forming a getter of a strip type when fabricating a conventional plasma display panel.

Referring to FIG. 6, a strip type getter is formed on a plasma display panel rear panel before the bonding process for sealing the front panel and the rear panel during the plasma display panel fabrication process.

However, the getter is activated while the getter is activated during the exhaust after the plasma panel panel front panel and the rear panel are bonded together, and there is a problem in that the getter performance is degraded due to the remaining impurity gas.

Accordingly, the present invention relates to a plasma display panel and a method of manufacturing the same, which can prevent the performance of the getter due to the impurity gas in the exhaust and thereby activate the getter to improve the lifetime of the plasma display panel.

Plasma display panel according to the present invention for achieving the above object is a getter (Getter) disposed to remove the impurity gas in the space between the front panel and the back panel bonded with a predetermined seal material (Getter), the getter of the getter It includes a heating element that heats for activation.

The heating element is an electric heating element that emits heat by using an electrical resistance.

The heating element is connected to an external power source, and is characterized by dissipating heat for activation of the getter with power supplied by the power source.

The getter is characterized in that it is formed so as to surround the heating element.

The getter may be disposed on an invalid surface on which an image is not displayed during driving.

In addition, the manufacturing method of the plasma display panel according to the present invention comprises the steps of (a) disposing a getter including a heating element between the front panel and the rear panel, (b) the front panel and the rear panel is a predetermined seal ( (C) injecting exhaust and discharge gas through an exhaust hole formed in at least one of the front panel and the rear panel, and (d) heating the heating element to activate the getter. Include.

The heating element is an electric heating element that emits heat by using an electrical resistance.

The heating element is connected to an external power source, and is characterized by dissipating heat for activation of the getter with power supplied by the power source.

The getter is characterized in that it is formed so as to surround the heating element.

The getter may be disposed on an invalid surface on which an image is not displayed during driving.

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

7 is a plan view illustrating a plasma display panel in which a getter is inserted according to the present invention.

Before referring to FIG. 7, in the plasma display panel according to the present invention, a front panel in which a plurality of sustain electrode pairs are arranged and a rear panel in which a plurality of address electrodes are formed to face each other so as to cross each other are arranged at a predetermined interval. It adheres to a predetermined substance. At this time, at least one of the front panel or the rear panel is formed with an exhaust hole for injecting the exhaust and discharge gas.

As shown in FIG. 7, the getter 710 of the plasma display panel according to the present invention is installed inside the plasma display panel in the form of a thin plate having a thickness smaller than the distance between the front panel and the rear panel, and the installation position is conventional. As described above, the plasma display panel is formed in the non-discharge region 700 where no plasma discharge occurs, so that the external shape of the plasma display panel is not changed. At this time, the heating element 720 is formed between the getter 710 according to the present invention. This is to allow the heat generated from the heating element 720 to spread evenly in the getter 710 due to the deterioration of the getter performance due to impurity gas during exhaust so that the activation of the getter 710 even after the exhaust process is better shown.

The heating element 720 formed as described above is connected to the external power source 730 and emits heat for activating the getter with power supplied by the power source.

Looking at the getter formed in more detail as shown in FIG.

8 is a cross-sectional view illustrating a getter of the plasma display panel according to the present invention.

As shown in FIG. 8, the getter 710 of the plasma display panel according to the present invention includes a heating element 720 therein. The reason why the getter 710 surrounds the heating element 720 as described above is to spread the heat generated from the heating element 720 evenly in the getter 710 as described above so that the getter 710 can be more activated. . Accordingly, the getter 710 applied to the present invention is a non-diffusion getter made of either a fill type getter or a strip type getter.

The getter 710 having such a structure is connected to the external power source 730 to the heating element 720 included in the getter after the exhaust process to supply power to the getter 710 is activated due to the heating element 720 impurity It will remove the gas.

Looking at the manufacturing method of the plasma display panel including such a getter is as follows.

9 is a block diagram sequentially illustrating a method of manufacturing a plasma display panel according to the present invention.

As shown in FIG. 9, the manufacturing method of the plasma display panel according to the present invention includes an assembly process including a front panel manufacturing process listed on the right side of FIG. 9, a rear panel manufacturing process listed on the left side, and a sealing process listed below. .

First, the front panel listed on the right side of FIG. 9 prepares a front glass as a substrate (900), and then a plurality of sustain electrode pairs are formed on the front glass (901). Thereafter, an upper dielectric layer is formed over the sustain electrode pair (902), and a protective layer made of magnesium oxide for protecting the sustain electrode pair is formed over the upper dielectric layer (903).

Subsequently, referring to the rear panel manufacturing process listed on the left side of FIG. 9, as in the front panel, a rear glass which is first described is prepared (910), and a plurality of address electrodes are formed on the rear glass so as to face each other by crossing the sustain electrode pair formed on the front panel. (911). Thereafter, a lower dielectric layer is formed on the upper surface of the address electrode (912), and a phosphor layer is formed on the upper surface of the lower dielectric layer (913). Thereafter, the getter is mounted on the ineffective surface of the panel to remove the impurity gas of the plasma display panel (914).

The front panel and the rear panel manufactured as described above are sealed to each other (920) to form a plasma display panel (930).

In the method of manufacturing a plasma display panel according to the present invention, a process of activating a getter mounted on an ineffective surface of a rear panel is as follows.

10 illustrates a process of activating a getter of the plasma display panel according to the present invention.

Referring to FIG. 10, a plasma display panel according to the present invention first forms an exhaust hole for injecting exhaust and discharge gas into at least one of a front panel and a rear panel.

Thereafter, the front panel and the rear panel are joined using a material such as frit glass to form a plasma display panel, and exhaust and discharge gases are injected through an exhaust hole formed in any one of the front panel and the rear panel.

After the exhaust and discharge gas injection, heat is applied to the heating element through the power supply. At this time, the power of the heating element is connected to the outside, and heat is supplied to the heating element by the power supplied by the power.

As described above, when the heating element is heated, the getter is activated to absorb the impurity gas existing in the plasma display panel. At this time, the getter is made of either a fill type or a strip type getter, and the getter preferably surrounds the heating element in order to receive heat from the heating element.

The getter of the plasma display panel according to the present invention prevents the performance of the getter due to the impurity gas in the exhaust of the panel, and activates the getter after the exhaust process to remove all the impurity gas present in the panel. It can improve the service life.

As described above, the technical configuration of the present invention can be understood by those skilled in the art that the present invention can 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 their All changes or modifications derived from equivalent concepts should be construed as being included in the scope of the present invention.

Therefore, the present invention has an effect of improving the life of the plasma display panel by activating the getter after the exhaust process by using the heating element to more efficiently remove the impurity gas present in the plasma display panel.

Claims (10)

A getter disposed to remove impurity gas in the space between the front panel and the rear panel, which is bonded to a predetermined seal material, Heating element that heats the getter to activate the getter Plasma display panel comprising a. The method of claim 1, The heating element is a plasma display panel, characterized in that the electrical heating element for dissipating heat by using an electrical resistance. The method of claim 2, And the heating element is connected to an external power source and emits heat for activation of the getter by the power supplied by the power source. The method according to any one of claims 1 to 3, And the getter is formed so as to surround the heating element. The method of claim 4, wherein And the getter is disposed on an invalid surface on which an image is not displayed during driving. (a) disposing a getter including a heating element between the front panel and the rear panel; (b) bonding the front panel and the back panel to each other using a predetermined seal material; (c) injecting exhaust and discharge gas through an exhaust hole formed in at least one of the front panel and the rear panel; And (d) heating the heating element to activate a getter Method of manufacturing a plasma display panel comprising a. The method of claim 6, The heating element is a method of manufacturing a plasma display panel, characterized in that the electrical heating element for dissipating heat by using an electrical resistance. The method of claim 7, wherein The heating element is connected to an external power source, the method of manufacturing a plasma display panel, characterized in that for dissipating heat for the activation of the getter by the power supplied by the power source. The method according to any one of claims 6 to 8, And the getter is formed to surround the heating element. The method of claim 9, And the getter is disposed on an invalid surface on which an image is not displayed during driving.

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