KR100226848B1 - Manufacturing method of color plasma display panel - Google Patents

Abstract

A method of manufacturing a color plasma display panel, comprising: forming partitions having discharge spaces on the glass, and forming a predetermined pattern on the partitions; After placing the mask of the, the color phosphor display by spraying the color phosphor in the exposed discharge space to a predetermined thickness, and heat-treating the glass substrate to cure the phosphor layer, the high-resolution color plasma display To make panels.

Description

Manufacturing Method of Color Plasma Display Panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly to a method of manufacturing a color plasma display panel in which a phosphor layer is formed by using a spray method.

In general, a plasma display panel drives a pixel by forming a sustain electrode and an address electrode in a matrix form between an upper substrate and a lower substrate, and generates a discharge therebetween to generate an image using ultraviolet rays generated therein. A flat panel display device to implement.

1 is a diagram illustrating a unit cell cross-sectional structure of a typical plasma display panel.

Referring to FIG. 1, a typical plasma display panel forms a pair of sustain electrodes 11 having a predetermined width and height on the same surface of the upper substrate 10, and prints the dielectric layer 12 on the sustain electrodes 11. And an upper structure formed by the method, wherein the dielectric protective layer 13 is formed on the dielectric layer 12 formed on the sustain electrode 11. In order to form an address electrode 15 having a predetermined width and height on the lower substrate 14, and to prevent crosstalk between adjacent cells occurring in the address electrode 15, the partition wall 16 is formed. And a lower structure in which the phosphor layer 17 is formed on the sidewall surface of the partition wall 16 and the address electrode 15.

An inert gas is enclosed between the upper structure and the lower structure to form a discharge region 18.

The operation of the plasma display panel configured as described above is as follows.

When a driving voltage is applied to the sustain electrode 11, surface discharge occurs in the discharge region 18 on the surface of the dielectric layer 12 and the dielectric protective layer 13, thereby generating ultraviolet rays 19.

Color display is performed as the fluorescent material of the surrounding phosphor layer 17 is excited by the generated ultraviolet light 19.

That is, the space charges present in the discharge cells are accelerated by the driving voltage applied thereto, and the inert mixed gas filled with the pressure of about 400 to 500 torr in the discharge cells, that is, helium (He) is mainly used. 147 nm ultraviolet rays are generated when the inert gas is excited by colliding with a phenning mixed gas containing xenon (Xe), neon (Ne) gas, and the like.

Visible light is generated when the ultraviolet rays 19 collide with the phosphor layer 17 surrounding the address electrode 15 and the partition 16.

The manufacturing method of the plasma display panel configured as described above is as follows.

First, a sustain electrode 11 as an upper electrode is formed on the upper insulating substrate 10.

In this case, the sustain electrode 11 uses a transparent electrode (ITO (Indium-Tin Oxide)) on which indium oxide or tin oxide is deposited.

Subsequently, in order to generate wall charges to lower the driving voltage, a dielectric paste is printed on the sustain electrode 11 to form the dielectric layer 12, followed by drying and firing.

The dielectric layer 12 is a low melting glass material mainly composed of lead oxide.

Subsequently, the dielectric protection layer 13 is formed to prevent damage to the dielectric layer 12.

At this time, the dielectric protective layer 13 is formed by the electron beam deposition method using magnesium oxide.

Subsequently, the address electrode 15 is formed on the lower insulating substrate 14.

Subsequently, when formation of the address electrode 15 is completed, the partition wall 16 is formed on the lower insulating substrate 14 by using a thick film printing method to prevent color mixing between adjacent discharge cells.

At this time, the thickness of the partition wall printed once is 13 micrometers-15 micrometers, and the thickness of all the partition walls is 130 micrometers-150 micrometers.

Next, as shown in FIG. 2, the phosphor layer 17 is deposited on the upper surface of the partition wall 16 by a method such as printing, so that the phosphor layer 17 is caused by its own weight. The wall surface of the wall is allowed to flow down and adhere to the inner wall of the partition wall 16.

When the upper and lower substrates thus formed are sealed with the sealant, a sealed space is formed.

At this time, the upper / lower structure seals the discharge gas into the space sealed by the sealant, and the panel sealed through the hole by combining a hole (not shown) and a gas injection glass tube (not shown) drilled in the lower corner portion. When evacuating the negative air and evacuating it, the degree of vacuum is usually about 10 ^-6 to 10 ^-8 torr.

The gas is injected by the gas injection device and the glass tube is sealed with heat to form a panel in which the discharge gas is completely sealed.

In the plasma display panel configured as described above, the phosphor layer does not sufficiently flow down due to surface tension or adhesion, and thus is attached only to the upper part of the partition wall. In particular, there is a problem in that adhesion to the upper substrate is poor due to the residual phosphor.

Therefore, there is a problem of causing local luminance unevenness and abnormal light emission.

The present invention has been made to solve the problems according to the prior art, an object of the present invention by spraying the phosphor on the upper surface of the lower substrate and a plurality of partition sidewalls (spray) to form a uniform phosphor layer and high luminous luminance. The present invention provides a method of manufacturing a color plasma display panel.

1 is a view showing a unit cell cross-sectional structure of a general color plasma display panel;

2 is a view showing the structure of a color plasma display panel according to the prior art;

3A to 3E illustrate a method of manufacturing a color plasma display panel according to the present invention.

Explanation of symbols for main parts of the drawings

10: upper substrate 11: sustain electrode

12 dielectric layer 13 dielectric protective layer

14: lower substrate 15: address electrode

16: partition 17: phosphor layer

18: discharge area 19: ultraviolet light

20: mask

A color plasma display panel manufacturing method according to the present invention is characterized in that, in the method of manufacturing a color plasma display panel having a glass substrate, forming a partition having a discharge space on the glass, and a predetermined pattern on the partition walls After placing the mask, spraying the color phosphor in the exposed discharge space to form a color phosphor layer to a predetermined thickness, and heat-treating the glass substrate to harden the phosphor layer.

Hereinafter, a preferred embodiment of the plasma display panel manufacturing method according to the present invention.

3A to 3E illustrate a method of manufacturing a color plasma display panel according to the present invention.

Referring to FIG. 3, in the method of manufacturing a color plasma display panel according to the present invention, as shown in FIG. 3A, the partition wall 16 is first formed on the lower substrate 14 in a predetermined pattern.

Subsequently, as shown in FIG. 3B, after the pattern mask 20 is placed on the partition wall 16, the first color phosphor R is exposed on the lower substrate 14 and the sidewalls of the partition wall 16. Spray it.

The color phosphor is composed of 90 wt% of water, 10 wt% of phosphor, a dispersant (electrodeposition agent) and the like.

The color phosphor is composed of 90 wt% to 97 wt% of alcohol, 3 wt% to 10 wt%, and the like.

Therefore, the first color fluorescent layer 17 is formed in the exposed portion in a predetermined pattern.

Next, as shown in FIG. 3E, the first color phosphor layer R is dried.

Subsequently, as shown in FIG. 3C, after the pattern mask 20 is placed on the partition wall 16, the second color phosphor G is disposed on the exposed portion, that is, on the lower substrate 14 and the sidewalls of the partition wall 16. Spray it.

Next, as shown in FIG. 3E, when the second color phosphor layer 17 is formed in the exposed portion, the second color phosphor layer 17 is dried.

Subsequently, as shown in FIG. 3D, after placing the pattern mask 20 on the lower substrate 14, the third color phosphor B on the exposed portion, that is, on the lower substrate 14 and the sidewalls of the partition wall 16. Spray).

Next, as shown in FIG. 3E, when the third color phosphor layer 17 is formed in the exposed portion, the third color phosphor layer 17 is dried.

In the drying, water and alcohol contained in the color phosphor layer 17 are evaporated.

Subsequently, the lower substrate is heat treated to cure the phosphor layers.

As described above, according to the present invention, the adhesion of the phosphor is remarkably improved, so that problems such as uneven luminance and abnormal emission due to dropping of the phosphor do not occur.

Accordingly, the present invention greatly contributes to providing a color plasma display panel of high definition and high reliability.

The plasma display panel manufacturing method according to the present invention has the effect of significantly increasing the adhesion of the color phosphor by spraying the color phosphor on the lower substrate and a plurality of partitions.

In addition, there is an effect that can prevent abnormal luminance and the like caused by uneven brightness or dropping of the phosphor.

Therefore, a color plasma display panel of high quality and high reliability can be manufactured.

Claims (4)

In the color plasma display panel manufacturing method having a glass substrate, Forming barrier ribs having discharge spaces on the glass; Placing a mask of a predetermined pattern on the barrier ribs, and then spraying color phosphors in the exposed discharge space to form color phosphor layers to a predetermined thickness; And heat-treating the glass substrate to cure the phosphor layer. The method of claim 1, The color phosphor injection is a method of manufacturing a color plasma display panel, characterized in that for sequentially spraying R, G, B color phosphor. The method of claim 1, The color phosphor is made of 90wt% water, 10wt% phosphor and an electrodeposition agent. The method of claim 1, The color phosphor is made of 90wt% to 97wt% alcohol, 3wt% to 10wt% phosphor, characterized in that the color plasma display panel manufacturing method.

Images