KR100718055B1 - Manufacturing method for stratum of fluorescence plasma display panel - Google Patents

Abstract

The present invention relates to a method of manufacturing a fluorescent layer of a plasma display panel.

According to one or more exemplary embodiments, a method of manufacturing a fluorescent layer of a plasma display panel includes : preparing a rear substrate of a plasma display panel having a plurality of partition walls arranged thereon; A screen mask preparation step of preparing three screen masks having holes corresponding to grooves between the partition walls and the partition walls arranged on the rear substrate after completion of the rear substrate preparation step; A first screen arrangement step of placing a first screen mask on an upper end of the barrier rib after completing the screen mask preparation step and matching the hole with respect to a groove formed between the barrier rib and the barrier rib; A first fluorescent layer filling step of filling a first fluorescent layer raw material into holes formed in the first screen after completing the first screen disposing step; A second screen disposing step of disposing a second screen mask on an upper end of the partition wall after completing the filling of the first fluorescent layer, and matching the hole with respect to a groove formed between the partition wall and the partition wall; A second fluorescent layer filling step of filling a second fluorescent layer raw material into holes formed in the second screen after completing the second screen disposing step; A third screen disposing step of disposing a third screen mask on an upper end of the partition wall after completing the filling of the second fluorescent layer, and matching the hole with respect to a groove formed between the partition wall and the partition wall; A third fluorescent layer filling step of applying a third fluorescent layer raw material to holes formed in the third screen after completing the third screen disposing step; And a firing step of putting the rear substrate filled with the respective fluorescent layers after the completion of the third fluorescent layer filling step into the firing furnace and firing .

Therefore, the process of forming the fluorescent layer on the front substrate can be simplified to improve the productivity and prevent the loss of the raw material of the fluorescent layer, as well as to recycle the fluorescent layer raw material remaining after the coating.

Front Board, Back Board, Heat Exchanger, Screen Mask, Hole

Description

Manufacturing method for stratum of fluorescence plasma display panel             

1 is an exploded perspective view for showing a general plasma display panel to which the present invention is applied.

2 is a cross-sectional view showing a coupling state of FIG.

3 is a process diagram showing a process for forming a fluorescent layer on the front substrate of a conventional plasma display panel.

4A to 4B illustrate an example of forming a fluorescent layer on a front substrate of a conventional plasma display panel.

Figure 5 is a process chart showing a fluorescent layer manufacturing method according to the present invention.

6A to 6B illustrate an example of forming a fluorescent layer on a front substrate of a plasma display panel according to the present invention.

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

10,20; front and rear substrate 11; holding electrode

11a; transparent electrode 11b; bus electrode

12; dielectric layer 13; protective layer

21; bulkhead 30; screen mask

31; hall

The present invention relates to a method for manufacturing a fluorescent layer of a plasma display panel, and more particularly, to simplify the process of forming a fluorescent layer on a front substrate to improve productivity and prevent loss of raw materials of the fluorescent layer, as well as after application. The present invention relates to a method of manufacturing a fluorescent layer of a plasma display panel capable of recycling the remaining fluorescent layer raw material.

Recently, the importance of the image display device (or the image display device) has become more important as the development of high-definition television is partially completed and the improvement plan for this is continuously studied. As such a type of image display device, as is known, a color cathode ray tube (CRT), a liquid crystal display (LCD), a fluorescent display (VFD), a plasma display panel (hereinafter referred to as PDP), etc. There is this.

However, since it is not technically completed as a display element that can be satisfied with the development of high definition television (High Definition TeleVision), it is being developed while maintaining a complementary relationship at different positions.

Among the image display apparatuses, the plasma display panel is used to display an image by using a gas discharge phenomenon, has the most promising resolution and roughness ratio in this field, is fast in response, and suitable for displaying a large area image. Widely used in applications such as televisions, monitors, and indoor and outdoor advertising display panels.

1 and 2 illustrate an exploded perspective view showing a state in which a typical plasma display panel is separated and a cross-sectional view showing a combined state.

In other words, the rear substrate shown in FIG. 2 is rotated 90 ° with respect to the front substrate for better understanding.

As illustrated, the plasma display panel is coupled in parallel with the front substrate 10, which is a display surface on which an image is displayed, and the rear substrate 20, which forms a rear surface, with a predetermined distance therebetween.

Under the front substrate 10, a sustain electrode 11 for maintaining light emission of a cell by mutual discharge in one pixel, that is, a transparent electrode (or ITO electrode) 11a formed of a transparent ITO material and a metal material The sustain electrodes 11 provided as the manufactured bus electrodes 11b are installed in pairs.

The sustain electrode 11 is covered by a dielectric layer 12 that limits the discharge current and insulates the electrode pairs, and a protective layer 13 having magnesium oxide (MgO) deposited thereon to facilitate discharge conditions. Is formed.

In addition, between each of the sustain electrodes 11, a light blocking function absorbs external light generated from the outside of the front substrate 10 to reduce reflection, and improves the purity and contrast of the front substrate 10. Black matrices (not shown in the drawings) which function as a function of making a pattern or the like are arranged.

The rear substrate 20 has an address discharge at a portion where a plurality of discharge spaces, that is, stripe-type (or well-type) barrier ribs 21 for forming cells are arranged in parallel and intersect with the sustain electrode 11. A plurality of address electrodes 22 are generated in parallel with the partition wall 21 to generate vacuum ultraviolet rays.

In addition, an upper surface of the rear substrate is coated with an RGB fluorescent layer 23 that emits visible light for displaying an image when address discharge is performed except for an upper surface of the partition wall 21, and is disposed on an upper side of the address electrode 22. Dielectric layer 24 is formed by firing.

The process of firing the fluorescent layer with respect to the rear substrate in the conventional plasma display panel configured as described above will be described with reference to process charts such as a and b in FIGS.

That is, the process of baking a fluorescent layer between the partitions provided in the back substrate is largely divided into the formation method by screen printing and the formation method by the photosensitive paste.

In the method of forming by screen printing, red is printed and dried using a screen mask having fine holes, green is printed and dried again, and blue is printed and dried.

When the printing of the fluorescent layer is completed as described above, it is put in a firing furnace and fired to form a fluorescent layer.

On the other hand, in the method of forming a photosensitive paste, red color is printed and dried, and when drying is completed, exposure and removal of unnecessary parts are completed to form one color, and the above operation is repeated to develop green and blue colors. After that, the formation of the fluorescent layer is completed by firing.

However, in the former forming method, in the former case, the screen mask is deformed by a tolerance generated during the manufacturing process so that minute holes are formed in the screen mask, and thus color is mixed, that is, defect due to mixed color. There was a fear that this would occur.

In addition, finely formed holes could be blocked during the process of injecting each color raw material for forming the fluorescent layer through the screen mask. There was also a problem of concern.

On the other hand, in the latter case, since the fluorescent layer must be formed by several processes, the productivity is lowered, and there is a problem that the loss of each of the fluorescent layer raw materials is increased.

Accordingly, a technical problem to be solved by the present invention, that is, an object of the present invention, is created to solve a problem occurring during a process of forming a fluorescent layer on a front substrate of a conventional plasma display panel. To simplify the process of forming the fluorescent layer to improve the productivity and to prevent the loss of the raw material of the fluorescent layer, and to provide a method for manufacturing a fluorescent layer of the plasma display panel that can recycle the remaining raw material of the fluorescent layer after application. .

In order to achieve the above object, a method of manufacturing a fluorescent layer of a plasma display panel according to an example of the present invention includes preparing a rear substrate of a plasma display panel having a plurality of partition walls arranged thereon; A screen mask preparation step of preparing three screen masks having holes corresponding to grooves between the partition walls and the partition walls arranged on the rear substrate after completion of the rear substrate preparation step; A first screen arrangement step of placing a first screen mask on an upper end of the barrier rib after completing the screen mask preparation step and matching the hole with respect to a groove formed between the barrier rib and the barrier rib; A first fluorescent layer filling step of filling a first fluorescent layer raw material into holes formed in the first screen after completing the first screen disposing step; A second screen disposing step of disposing a second screen mask on an upper end of the partition wall after completing the filling of the first fluorescent layer, and matching the hole with respect to a groove formed between the partition wall and the partition wall; A second fluorescent layer filling step of filling a second fluorescent layer raw material into holes formed in the second screen after completing the second screen disposing step; A third screen disposing step of disposing a third screen mask on an upper end of the partition wall after completing the filling of the second fluorescent layer, and matching the hole with respect to a groove formed between the partition wall and the partition wall; A third fluorescent layer filling step of applying a third fluorescent layer raw material to holes formed in the third screen after completing the third screen disposing step; And a firing step of putting the rear substrate filled with the respective fluorescent layers after the completion of the third fluorescent layer filling step into the firing furnace and firing .

Preferably, the first, second, third fluorescent layer filling step is preferably filled by spraying.

Also preferably, the first, second and third screens may be made of a thin metal material.

More preferably, the partition wall applied in the present invention is preferably provided with at least one of a stripe type or a well type.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention for achieving the above object will be described in detail by process.

In other words, since the structure of the rear substrate manufactured by the present invention is the same as the structure of the general rear substrate as described above in the prior art, a separate overlapping description thereof will be omitted, and only the same parts and members as in the prior art will be omitted. It demonstrates by attaching | subjecting the same code | symbol.

5 is a process diagram for step by step showing the process of the back substrate manufacturing method according to the present invention, Figure 6 a, b is an exemplary view showing the process of Figure 5 roughly.

Backplane Preparation Steps

A rear substrate 20 of a plasma display panel having a plurality of partition walls 21 arranged thereon is prepared.

In other words, what is the fluorescent layer between the partition wall 21 and the partition wall 21 in a state where the address electrode 22, the dielectric layer 24, and the partition wall 21 are provided by a conventional baking method. Is not applied.

Screen Mask Preparation Steps

After the step of preparing the rear substrate as described above, the grooves (not shown) and the corresponding holes 31 formed between the partition wall 21 and the partition wall 21 arranged on the rear substrate 20 are formed. Screen masks 30 are prepared.

Although not illustrated for each of the screen masks 30, fluorescent layers of different colors are applied to the grooves formed between the partition walls 21 and the partition walls 21 arranged on the rear substrate 20. Therefore, the holes 31 having the same arrangement as that of the different colors applied to the grooves formed between the partition wall 21 and the partition wall 21 will be formed.

In this case, the screen mask 30 used is made of a thin plate and a strong metal material.

First screen layout

After the screen mask preparation step is completed as described above, the first screen mask is disposed on the upper end of the partition wall 21, and the hole 31 coincides with the groove formed between the partition wall 21 and the partition wall 21. Let's do it.

Since the second and third screen disposition steps are the same as the first screen disposition steps, a separate description thereof will be omitted.

First fluorescent layer filling step

After completing the first screen arrangement step as described above, by spraying a red fluorescent material to the hole 31 formed in the first screen by a spray into the groove formed between the partition wall 21 and the partition wall 21. The fluorescent layer raw material is filled.

Since the filling of the second and third fluorescent layers is the same as the filling of the first fluorescent layer, a separate description thereof will be omitted.

Firing stage

After completing the third fluorescent layer filling step as described above, the back substrate filled with each fluorescent layer is put into a kiln (not shown) and fired. That is, when the back substrate filled with the fluorescent layer raw material is fired in the state in which it is put into the kiln, the volatile substances contained in the fluorescent layer raw material are volatilized and only the non-volatile material remains.

Of course, the partition wall in which the fluorescent layer is fired as described above is applied to both the stripe-type partition wall and the well-type partition wall having a lattice structure.

Since the rear substrate according to the present invention completed by the above process is coupled to the front substrate and operated in the same manner as in the prior art, a redundant description thereof will be omitted and only limited to the features of the present invention.

That is, when the fluorescent layer is fired using the fluorescent layer raw material according to the present invention, red, green, and blue fluorescent lights are generated by three operations in which a screen mask made of three metal materials is placed on the top surface of the partition wall 21. The layer material is introduced through the hole 31 formed in the screen mask 30, dried by a single operation, and fired by a single operation to complete firing of the fluorescent layer.

Therefore, the number of processes is reduced, and each fluorescent layer material is filled by three screen masks for filling three colors, thereby reducing the loss of the fluorescent material.

Therefore, as in the related art, deformation is caused to the screen mask by a tolerance generated during the process of manufacturing the screen mask so that a minute hole is formed, and thus, a problem of a concern that the color is mixed, that is, a defect due to mixed color, is actively induced. Is solved.

In addition, in the process of injecting each color raw material for forming the fluorescent layer through the screen mask, finely formed holes may be blocked, and thus, the desired color may not be properly injected into the set area, which may cause a defect in the product. The problem is also solved.

In addition, since the fluorescent layer must be formed in three steps by a single screen mask, the productivity is lowered, and the problem that the loss of each color material of red, green, and blue is increased so much is solved.

As described in detail above, according to the present invention, there is a feature of simplifying a process of forming a fluorescent layer on a front substrate to improve productivity.

In addition, the present invention not only prevents the raw material of the fluorescent layer from being lost, but also has the characteristics of recycling the raw material.

Until now illustrated and described with respect to the preferred embodiment according to the present invention, but not limited to this can be variously changed and used by those skilled in the art.

However, it is apparent that such modifications fall within the scope of the present invention.

Claims (5)

A rear substrate preparation step of preparing a rear substrate of a plasma display panel in which a plurality of partition walls are arranged; A screen mask preparation step of preparing at least three screen masks having holes corresponding to grooves between the partition walls and the partition walls arranged on the rear substrate after completion of the rear substrate preparation step; A first screen arrangement step of placing a first screen mask on an upper end of the barrier rib after completing the screen mask preparation step and matching the hole with respect to a groove formed between the barrier rib and the barrier rib; A first fluorescent layer filling step of filling a first fluorescent layer raw material into holes formed in the first screen after completing the first screen disposing step; A second screen disposing step of disposing a second screen mask on an upper end of the partition wall after completing the filling of the first fluorescent layer, and matching the hole with respect to a groove formed between the partition wall and the partition wall; A second fluorescent layer filling step of filling a second fluorescent layer raw material into holes formed in the second screen after completing the second screen disposing step; A third screen disposing step of disposing a third screen mask on an upper end of the partition wall after completing the filling of the second fluorescent layer, and matching the hole with respect to a groove formed between the partition wall and the partition wall; A third fluorescent layer filling step of applying a third fluorescent layer raw material to holes formed in the third screen after completing the third screen disposing step; And After the third fluorescent layer filling step is completed, the firing step of putting the back substrate filled with each fluorescent layer in a firing furnace Method of manufacturing a fluorescent layer of the plasma display panel comprising a . The method of claim 1, wherein the filling of the first, second, and third fluorescent layers comprises filling by spray. The method of claim 1, wherein the first, second, and third screens are formed of a thin metal material. The method of claim 1, wherein the barrier rib is of a stripe type. The method of claim 1, wherein the partition wall is a well type having a lattice structure.

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