KR100737175B1 - Dispensing Apparatus for Manufacturing of Plasma Display Panel and Manufacuring Method Using the Same - Google Patents

Abstract

The present invention relates to a dispensing apparatus required for manufacturing a plasma display panel and a method of manufacturing a plasma display panel using the same.

The dispensing apparatus for manufacturing a plasma display panel according to the present invention includes a glow portion in which a storage space is formed and a discharge portion formed inside the glow portion and connected to the storage space, and a heating portion formed inside the glow portion to heat transfer to the discharge tube.

In the method of manufacturing a plasma display panel using the dispensing apparatus, when the phosphor layer of the rear glass is formed, the rear surface is controlled by adjusting the viscosity according to the change of the temperature of the phosphor paste while the phosphor paste passes through the discharge pipe of the dispensing apparatus. It is characterized by being applied to the glass formed.

Accordingly, the present invention can adjust the temperature of the phosphor paste to change the viscosity of the phosphor to dispense the paste in the right amount of the discharge cells in the appropriate amount, to prevent the mixing of the phosphor to improve the color purity of the phosphor There is an effect that can improve the image quality of the plasma display panel.

Plasma display panel, phosphor, dispensing, paste, viscosity

Description

Dispensing Apparatus for Plasma Display Panel Manufacturing and Plasma Display Panel Manufacturing Method Using The Same {Dispensing Apparatus for Manufacturing of Plasma Display Panel and Manufacuring Method Using the Same}

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

2 is a view for explaining a method of forming a phosphor layer during a manufacturing process of a plasma display panel.

FIG. 3 is a view for explaining a process of forming an R phosphor using the R phosphor dispensing apparatus of FIG. 2; FIG.

4 is a view illustrating a process of forming an R phosphor with the R phosphor dispensing unit of FIG. 2 when the viscosity of the R phosphor is relatively too low.

FIG. 5 shows that the viscosity of the R phosphor is too low to overflow outside the R discharge space when the R phosphor is dispensed.

6 is a view showing the structure of a dispensing apparatus for manufacturing a plasma display panel according to the present invention.

7 is an enlarged view of the discharge pipe and the heating part of FIG. 6.

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

40: dispensing device 400: glove

401: discharge pipe 402: discharge port

403: heating unit

The present invention relates to a plasma display panel, and more particularly, to a dispensing apparatus for manufacturing a plasma display panel and a method of manufacturing a plasma display panel using the same.

In general, the dispensing method is a method for forming a paste-like material having fluidity at a designated position. The field of application of this dispensing method varies, but is used to form a paste-like phosphor in a discharge space between partition walls in, for example, a plasma display panel. Herein, the structure of a general plasma display panel will be described.

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) and The same main discharge gas and an inert gas containing a small amount of xenon (Xe) are filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light structure.

1 illustrates a structure of a general plasma display panel.

As shown in FIG. 1, a plasma display panel includes a front panel including a plurality of sustain electrode pairs formed by pairing a scan electrode 101 and a sustain electrode 102 on a front glass 100, which is a display surface on which an image is displayed. A rear panel 11 having a plurality of address electrodes 112 arranged to intersect with the plurality of storage electrode pairs described above on the rear glass 110 forming the rear surface 110 is coupled in parallel with a predetermined distance therebetween. .

The front panel 10 is made of a scan electrode 101 and a sustain electrode 102, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 101 and the sustain electrode 102 provided as the bus electrode b are included in pairs. The scan electrode 101 and the sustain electrode 102 are covered by one or more dielectric layers 103 which limit the discharge current and insulate the electrode pairs, and the magnesium oxide upper surface of the dielectric layer 103 is easy to facilitate the discharge conditions. A protective layer 104 on which (MgO) is deposited is formed.

The rear panel 11 is arranged such that a plurality of discharge spaces, that is, barrier ribs 111 of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 112 which perform address discharge to generate vacuum ultraviolet rays are arranged in parallel with the partition wall 111. On the upper side of the rear panel 11, R, G, and B phosphor layers 113 for emitting visible light for image display during address discharge are formed. A white dielectric 114 is formed between the address electrode 112 and the phosphor layer 113 to protect the address electrode 112 and reflect visible light emitted from the phosphor layer 113 to the front panel 10.

The method of forming the phosphor layer 113 in the manufacturing process of the plasma display panel having such a structure is to form the phosphor in a predetermined sheet (Sheet), and the sheet for each R, G, B phosphor in the discharge space partitioned by the partition wall The phosphor layer 113 is formed by attaching each of the phosphors in a paste state or by dispensing the phosphors in a paste state for each of the R, G, and B phosphors in R, G, and B discharge cells partitioned by partition walls. do. A method of forming the phosphor layer 113 by dispensing among the methods of forming the phosphor layer 113 will be described with reference to FIG. 2.

2 is a diagram for describing a method of forming a phosphor layer during a manufacturing process of a plasma display panel.

As illustrated in FIG. 2, a method of applying a phosphor by dispensing during the manufacturing process of the plasma display panel is performed on a rear glass 110 fixed and aligned in combination with a predetermined fixing guide plate (not shown). Electrodes, dielectric layers, barrier ribs, and the like are formed, and then R, G, and B phosphors are dispensed by the dispensing apparatuses 20, 21, and 22 in the discharge space partitioned by the barrier ribs to form respective R, G, and B phosphors. . When such R, G and B phosphors are formed in the discharge space, it is also possible to dispense R, G and B phosphors with one dispensing device. However, since the R, G, B phosphors must be dispensed at the designated positions so that the R, G, and B phosphors do not mix with each other, it is necessary to form each R, G, B phosphor layer using a different dispensing device for each R, G, B phosphor. More preferred. For example, each of the R, G, and B phosphors is corresponding to R, G, and B phosphors using the R phosphor dispensing device 20, the G phosphor dispensing device 21, and the B phosphor dispensing device 22. Dispensing into a discharge cell. At this time, each dispensing device 20, 21, 22 includes a globe (Groove: 200, 201, 202) having a discharge pipe (unsigned), which is a passage through which the R, G B phosphors pass.

Here, only the forming of the R phosphor using the R phosphor dispensing apparatus 20 will be described with reference to FIG. 3. In FIG. 3, only the R-phosphor dispensing device 20 for dispensing the R-phosphor is described for convenience of description, but the following description will be given to the G-phosphor dispensing device 21 as well as the R-phosphor dispensing device 20. This corresponds to the B phosphor dispensing device 22.

FIG. 3 is a diagram for describing a process of forming an R phosphor using the R phosphor dispensing apparatus 20 of FIG. 2.

As illustrated in FIG. 3, a plurality of discharge pipes 301, which are passages for dispensing the R phosphors 300 in the R discharge space, are formed in the R phosphor dispensing device 20, and through the discharge pipes 301. The R phosphor 300 is accurately dispensed in the R discharge space within an error range to form respective R, G, and B phosphor layers. Here, the R phosphor 300 is in a paste state, and variables such as viscosity and composition ratio are calculated before being dispensed into the R discharge space. However, the R-phosphor 300 has a low left and right pressure gradient within the discharge pipe 301 of the dispensing device 20 and has a low viscosity so as to pass through the discharge pipe 301 without clogging, but is discharged out of the discharge pipe 301. After that, if the viscosity is too low, it becomes difficult to accurately position the R phosphor 300 in the specified R discharge space within an error range. Looking at the case where the viscosity of the R phosphor 300 is too low as shown in FIG.

4 is a view for explaining a process of forming an R phosphor with the R phosphor dispensing unit of FIG. 2 when the viscosity of the R phosphor is relatively low.

As shown in FIG. 4, when the viscosity of the R phosphor 300 is too low, the R phosphor 300 may be applied to the R discharge space through the discharge pipe 301 formed integrally with the R phosphor dispensing device 20. When the R phosphor 300 is not exactly applied to the designated R discharge space within an error range, but is applied to another adjacent G or B discharge space or applied to the upper part of the partition wall partitioning each of the R, G and B discharge spaces. Occurs. This is because the R-phosphor 300 in a paste state having a viscosity of too low viscosity rides on the side adjacent to the discharge tube 301 of the R-phosphor dispensing apparatus 20 at the end of the discharge tube 301 of the R-phosphor dispensing apparatus 20. It happens because it spreads. As a result, color mixing of the phosphors occurs, resulting in a problem that the color purity is lowered.

5 is a view showing that the viscosity of the R phosphor is relatively low so that the R phosphor overflows out of the R discharge space when dispensed.

As shown in FIG. 5, when the viscosity of the R phosphor 300 is too low, when dispensing the R phosphor in the R discharge space, too much R phosphor is dispensed in a short time and overflows into the G or B discharge space. There was a problem flowing. In addition, there is a problem that it is difficult to control the dispensing speed because too much R phosphor is dispensed in a short time.

The present invention for solving this problem is to provide a dispensing apparatus for manufacturing a plasma display panel capable of dispensing the phosphor paste to the respective discharge cells corresponding to the exact amount and a method of manufacturing the plasma display panel using the same. have.

DISCLOSURE OF THE INVENTION The present invention for achieving the above object comprises a glow portion having a storage space, a discharge tube formed inside the glow portion and connected to the storage space, and a heating portion formed inside the glow portion to heat transfer to the discharge tube. Provides a fencing device.

At this time, the heating unit may surround the discharge pipe in a spiral shape.

In another aspect, the present invention is a plasma display panel, characterized in that the phosphor layer is formed by adjusting the viscosity according to the change of the temperature of the phosphor paste while the phosphor paste passes through the discharge pipe of the dispensing apparatus and applying it to the rear glass. It provides a method of manufacturing.

At this time, the temperature of the phosphor paste during discharge of the discharge tube of the dispensing apparatus may be 1.5 times or more and 3 times or less of the temperature of the phosphor paste when passing through the discharge tube upper side of the dispensing apparatus.

At the time of discharging the discharge pipe of the dispensing apparatus, the temperature of the phosphor paste may be 25 ° C. or more and 45 ° C. or less.

On the other hand, the viscosity of the paste for phosphor at the time of discharge of the discharge tube of the dispensing apparatus may be 0.4 times or more and 0.8 times or less of the viscosity of the paste for the phosphor when passing through the discharge tube upper side.

The viscosity of the phosphor paste may be 1100 cPs or more and 1800 cPs or less when the discharge pipe of the dispensing device is discharged.

Hereinafter, a dispensing apparatus for manufacturing a plasma display panel, a method for manufacturing a plasma display panel, and a plasma display panel according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

6 is a view showing the structure of a dispensing apparatus for manufacturing a plasma display panel according to the present invention.

As shown in FIG. 6, the dispensing apparatus 40 for manufacturing a plasma display panel according to the present invention has a glove 400, an outlet pipe 401, an outlet 402, and a heating unit 403.

The glove 400 has a storage space, not shown, for storing R, G, and B phosphors in a paste state. This storage space is connected to the discharge pump and the pressure pump not shown. Therefore, the pressure of the storage space is controlled by the pressure pump to control the discharge speed of the R, G, B phosphors stored in the storage space.

A plurality of discharge pipes 401 are formed in the longitudinal direction inside the glove 400. In addition, the discharge pipe 401 is connected to the storage space of the glove 400 serves as the discharge passage of the R, G, B phosphor.

The discharge port 402 is formed at the end of the discharge pipe 401 serves as an outlet of the R, G, B phosphor. On the other hand, the diameter and length of the discharge pipe 401 and the discharge port 402 are determined depending on the kind and viscosity of the R, G and B phosphors in the paste state, the height and area of the phosphor layer to be formed, and the like.

The heating unit 403 is formed at an upper predetermined position of the discharge pipe 401. Therefore, the heating part 403 is formed in the upper part of the discharge pipe 401, and the heating part 403 is not formed in the lower part. The heating unit 403 serves to adjust the viscosity by changing the temperature of the R, G, B phosphor in the paste state passing through the discharge pipe 401. The heating unit 403 surrounds the outer side of the discharge pipe 401 in a spiral shape. The heating unit 403 may be spaced apart from the discharge pipe 401 by a shape as well as surrounding the outside of the discharge pipe 401. At this time, the heating portion 403 may have any shape other than a spiral shape. In addition, the heating unit 403 may be formed in the storage space of the glow unit 400.

The heating unit 403 is preferably electrically connected to a heating control unit (not shown), but is not limited thereto. In this case, since the heating amount of the heating unit 403 is changed by changing the current or voltage applied to the heating unit 403, the temperature of the phosphor can be controlled.

The control temperature of the heating unit 403 may be determined according to the kind or viscosity of the R, G, and B phosphors in the paste state, the height and the area of the phosphor layer to be formed, and the like.

7 is an enlarged view of the discharge pipe and the heating coil of FIG. 6.

As shown in FIG. 7, when the heating part 43 formed at a predetermined position on the upper side of the discharge pipe 401 is heated, the temperature of the phosphor in the paste state is increased. As the temperature of the phosphor in the paste state (404 state in FIG. 7) rises, the viscosity of the phosphor decreases.

If the heating unit 43 is also formed in the storage space, the phosphor is heated to a predetermined temperature in advance in the storage space, and the heating is performed so that the temperature of the phosphor in the discharge pipe 401 is 1.5 times or more than 3 times the temperature of the phosphor in the general paste state. Adjust the portion 43.

After the phosphor passes through the discharge pipe 401 in which the heating part 43 is formed, the temperature decreases and the viscosity increases. At this time, when the phosphor (405 state in FIG. 7) is discharged from the discharge port 402, the temperature of the phosphor 405 is 1.5 times or more and 3 times or less, that is, 25 ° C. or more and 45 ° C. or less of the phosphor temperature in a general paste state. The viscosity of 404 is 0.4 times or more and 0.8 times or less, that is, 1100 cPs or more and 1800 cPs or less of the phosphor viscosity in a general paste state. At this time, when the temperature of the phosphor 404 is less than 25 ° C, the viscosity of the phosphor 404 is less than 1100 cPs, and when the viscosity of the phosphor 404 is less than 1100 cPs, the discharge pipe 401 is discharged. ) Can be blocked, the viscosity of the phosphor 404 exceeds 1800 cPs when the temperature of the phosphor 404 exceeds 45 ℃, mixed color of the phosphor 404 when the viscosity of the phosphor 404 exceeds 1800 cPs May cause. In addition, a cooling unit may be provided in the lower portion of the discharge pipe 401 to forcibly cool the temperature of the phosphor 405 to obtain a desired viscosity.

As a result, the viscosity of the phosphor 405 at the time of discharge is relatively high, as shown in FIG. 4, not only does not cause a problem that the phosphor spreads sideways along the surface adjacent to the discharge pipe 401 of the dispensing device 40, but also FIG. 5. As described above, since the time for dispensing the phosphor in the discharge space is not too short, too much phosphor may be dispensed to prevent the problem of overflowing to another discharge space.

The reason why the phosphor layer is formed by dispensing the phosphor in the paste state is that the phosphor layer is simply located in the R, G, and B discharge cells partitioned by the partition wall. Therefore, the phosphor is formed by the dispensing method which has a relatively high working speed. At this time, since the phosphor is formed by controlling the temperature of the phosphor to change the viscosity from the low state to the high state when the phosphor passes through the discharge pipe 401, the discharge characteristics and the discharge reliability of the plasma display panel can be improved.

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

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

As described in detail above, the present invention can adjust the temperature of the phosphor paste to change the viscosity of the phosphor, so that the phosphor in the paste state can be accurately dispensed in each corresponding discharge cell, thereby preventing the color mixture of the phosphor, The color purity of the sieve may be improved to improve the image quality of the plasma display panel.

Claims (8)

A glow portion having a storage space; A discharge pipe formed inside the glow part and connected to the storage space; Is formed inside the glow portion and includes a heating portion capable of heat transfer to the discharge pipe, The heating unit is a dispensing device for manufacturing a plasma display panel, characterized in that formed around the discharge pipe. delete The method of claim 1, The heating unit dispensing apparatus for manufacturing a plasma display panel, characterized in that the spiral surrounding the discharge pipe. The phosphor layer formed on the rear glass is formed by controlling the viscosity according to the change of the temperature of the phosphor paste while applying the phosphor paste through the discharge pipe of the dispensing apparatus and applying the same to the rear glass. Manufacturing method. The method of claim 4, wherein And a temperature of the phosphor paste during discharge of the discharging tube of the dispensing apparatus is 1.5 to 3 times the temperature of the phosphor paste when passing through the discharging tube upper side of the dispensing apparatus. The method of claim 5, And a temperature of the phosphor paste during discharge of the discharge pipe of the dispensing device is 25 ° C. or more and 45 ° C. or less. The method of claim 4, wherein And a viscosity of the phosphor paste during discharge of the discharge tube of the dispensing apparatus is 0.4 to 0.8 times the viscosity of the phosphor paste when passing through the discharge tube upper side of the dispensing apparatus. The method of claim 7, wherein And a viscosity of the phosphor paste during discharge of the discharge pipe of the dispensing device is 1100 cPs or more and 1800 cPs or less.

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