KR19980077351A - Plasma Display Device And Method Of Manufacturing The Same - Google Patents

Abstract

According to the present invention, there is provided a semiconductor device comprising: first and second substrate members; First and second electrodes respectively formed in directions crossing at right angles to opposite inner surfaces of the first and second substrate members; A dielectric layer stacked on the first substrate; A partition member stacked to form a plurality of cells on the second substrate; A phosphor coated on the inside of the partition member; And an inert gas charged in the plurality of cells, wherein the surface of the dielectric layer through which light emitted from the phosphor passes is formed with a curved surface having a predetermined curvature. The manufacturing method is provided. In the apparatus of the present invention, luminance is improved and color interference is prevented.

Description

Plasma Display Device And Method Of Manufacturing The Same

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device and a method of manufacturing the same, and more particularly, to a plasma display device and a method of manufacturing the same, which include condensed transparent dielectric layers and which emit light of a phosphor.

In general, a plasma display device is used to display an image using a gas discharge phenomenon, and is excellent in various display capacities such as display capacity, brightness, contrast, afterimage, viewing angle, etc., and has been spotlighted as a panel that can replace CRT. . In such a plasma display device, a discharge is generated in a gas between the electrodes by a direct current or an alternating voltage applied to the electrode, and the phosphor emits light by exciting the phosphor by radiation of ultraviolet rays.

Therefore, the plasma display apparatus can be divided into AC type (AC type) and DC type (DC type) by the discharge mechanism. In the DC type, each electrode constituting the plasma display panel is directly exposed to the gas layer encapsulated in the discharge cell, and the voltage applied thereto is applied to the discharge gas layer as it is. In the AC type, each electrode is separated by the discharge gas layer and the dielectric layer. The charged particles generated during the discharge phenomenon are not absorbed by the electrodes to form wall charges, and the next discharge is generated by using such wall charges.

FIG. 1 is a schematic exploded perspective view of the structure of a general plasma display device, which is for the AC plasma display device.

Referring to the drawings, a transparent first electrode 13a and a second electrode 13b are formed between the front glass substrate 11 and the back glass substrate 12. The first electrode 13a and the second electrode 13b are formed in a stripe shape on the inner surfaces of the front glass substrate 11 and the back glass substrate 12, respectively, when the substrates 11 and 12 are assembled to each other. Cross at right angles. The dielectric layer 14 and the protective layer 15 are sequentially stacked on the inner surface of the front glass substrate 11. Although not shown in the drawings, a black matrix may be selectively formed on the inner surface of the protective layer 15, and the black matrix has a function of preventing mutual interference of light formed from each pixel.

On the other hand, the partition wall 17 is formed in the back glass substrate 12, and the cell 19 is formed by the partition wall 17. As shown in FIG. The cell 19 is filled with an inert gas such as argon. In addition, the phosphor 18 is applied to a predetermined portion inside the partition wall 17 forming each cell 19.

Referring to the operation of the plasma display device having the configuration described above as follows.

First, in order to cause discharge of the electrodes 13a and 13b, a high voltage called a trigger voltage must be applied. Discharge occurs when cations are stored in the dielectric layer 14 by the trigger voltage. When the trigger voltage exceeds the threshold voltage, the argon gas or the like charged in the cell 19 becomes a plasma state by discharge, and can maintain a stable discharge state between the electrodes 13a and 13b. In the stable discharge state, the light in the ultraviolet region collides with the phosphor 18 in the discharge light to emit light, so that each pixel formed for each cell 19 can display an image.

In the plasma display apparatus having the above structure, only a part of the light emitted may be used, and thus there is a problem that the luminance efficiency is lowered. This phenomenon is due to various causes, but one of many causes is that the incident light emitted from the phosphor is radial and the light is scattered accordingly.

2 and 3 are cross-sectional views illustrating some of the cross sections taken along the lines II-II and III-III in the assembled state of the plasma display device shown in FIG. 1.

Referring to FIG. 2, since the radiation is made radially along the direction of the arrow from the point marked P in the drawing, the incident path of light is blocked by the partition wall 17, and also referring to FIG. The path is blocked by the electrode 13a. That is, only a part of the amount of light generated by the plasma discharge passes through the dielectric layer 14 and the front glass substrate 11 to contribute to image formation. In addition, even though the light passes through the dielectric layer 14 and the front glass substrate 11, the path is incident in a direction that mutually interferes with the path of the light generated from the adjacent cell 19, so color mixing cannot be avoided. . Of course, the black matrix may be selectively formed to prevent the interference of light, but there is a problem that it is difficult to fundamentally prevent the mixing of colors along the light path.

The present invention has been made to solve the above problems, an object of the present invention is to provide a plasma display device that can improve the brightness and prevent light interference.

It is another object of the present invention to provide a plasma display device having a dielectric layer having a curved surface to focus light generated in a cell.

Another object of the present invention is to provide a method of manufacturing a plasma display device having a curved dielectric layer.

1 is a schematic exploded perspective view of a typical plasma display device.

FIG. 2 is a cross-sectional view showing a part of a cross section taken along the line II-II in the assembled state of the plasma display device of FIG. 1; FIG.

3 is a cross-sectional view showing a part of a cross section taken along line III-III in the assembled state of the plasma display device of FIG. 1;

4 is a cross-sectional view showing a portion of a cross section taken along the line II-II of FIG. 1, according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view showing a portion of a cross section taken along line III-III of FIG. 1 of a plasma display device constructed in accordance with another embodiment of the present invention;

6A-6C are explanatory views illustrating a method of manufacturing a plasma display device according to an embodiment of the present invention.

7A to 7C are explanatory diagrams illustrating a method of manufacturing a plasma display device according to another embodiment of the present invention.

Brief description of the main symbols in the drawings

11.12.41.42. Substrates 13a, 13b, 43a, 43b. electrode

14.44. Dielectric layer 15.45. Protective layer.

17.47. Bulkhead 18.48. Phosphor

19.49. Cell 61.71. Board

63.73. Electrode 62.64. Dielectric paste layer

72. Dielectric paste layer 75. Anti-polishing mask

In order to achieve the above object, according to the invention, the first and second substrate members; First and second electrodes respectively formed in directions crossing at right angles to opposite inner surfaces of the first and second substrate members; A dielectric layer stacked on the first substrate; A partition member stacked to form a plurality of cells on the second substrate; A phosphor coated on the inside of the partition member; A plasma display device comprising: an inert gas charged in the plurality of cells, wherein the surface of the dielectric layer through which light emitted from the phosphor passes is formed as a curved surface having a predetermined curvature. Is provided.

According to one feature of the invention, the light refracted through the curved surface of the dielectric layer is focused into parallel light.

According to another feature of the invention, the curved surface of the dielectric layer extends parallel to it in the same direction as the longitudinal direction of the partition wall in the plurality of cells.

According to another feature of the invention, the curved surface of the dielectric layer extends in a direction perpendicular to the longitudinal direction of the partition wall in the plurality of cells.

Further, according to the present invention, by placing a mask of a predetermined pattern on one surface of the substrate member on which the first electrode is formed and applying a dielectric paste to form a dielectric paste layer of a predetermined pattern, the substrate on which the dielectric paste layer of the predetermined pattern is formed A method of manufacturing a plasma display device is provided that includes applying a dielectric paste over the entire area of a member surface and firing the dielectric paste layer so that the surface of the dielectric paste layer can flow.

According to another feature of the invention, the step of forming the dielectric paste layer of the predetermined pattern is repeated application and drying of the paste until the predetermined thickness is reached.

According to another feature of the invention, the portion where the dielectric paste layer of the predetermined pattern is formed corresponds to the position of the cell in the completed plasma display device.

Further, according to the present invention, forming a dielectric paste layer having a uniform thickness on one surface of the substrate member on which the first electrode is formed and disposing a mask pattern for preventing polishing of a predetermined pattern thereon, the abrasive particles on the surface of the dielectric paste layer Reducing the thickness of the dielectric paste layer in a portion not shielded by the anti-polishing mask member by spraying a; and firing the dielectric paste layer so that the surface of the dielectric paste layer can flow. A manufacturing method is provided.

According to one feature of the invention, the portion shielded by the anti-polishing mask member corresponds to the position of the cell in the completed plasma display device.

Hereinafter, the present invention will be described in more detail with reference to an embodiment shown in the accompanying drawings.

4 is a cross-sectional view showing a part of a cross section taken along the line II-II of FIG. 1 according to the present invention.

Referring to the drawings, the overall configuration of the plasma display device 40 is similar to that shown in FIG. That is, the first electrode 43a and the second electrode 43b are formed to cross each other at right angles in a stripe shape between the front glass substrate 41 and the rear glass substrate 42. The dielectric layer 44 and the protective layer 45 are sequentially stacked on the top glass substrate 42. Alternatively, a black matrix, not shown, may be formed on top of the protective layer 45. A partition wall 47 and a cell 49 are formed in the rear glass substrate 42, and an inert gas such as argon is filled in the cell 49. In addition, the phosphor 48 is applied to a predetermined portion inside the partition 47.

According to a feature of the invention, the surface of dielectric layer 44 (indicated by reference numeral 44a) through which light generated from phosphor 48 applied in each cell 49 passes is a curved surface having a predetermined curvature. Is formed. In FIG. 4, each cell 49 is formed between partition walls 47 on both sides, an upper dielectric layer 44 and a protective layer 45, and a lower phosphor 48. Curved surface 44a is formed by modifying dielectric layer 44 forming the top of cell 47. That is, the curved surface 44a is formed by convexly deforming the dielectric layer 44 toward the inside of the cell 47, which extends parallel to it in the longitudinal direction of the partition wall 47. The curved surface 44a of the dielectric layer 44 has a function of a kind of focusing lens, and thus light emitted to the outside of the front glass substrate 41 through the curved surface 44a has a form of parallel light whose path is parallel. Can be. That is, the light emitted at the point denoted by P 'in FIG. 4 is incident radially as indicated by the arrow A, but is refracted once passing through the curved surface 44a of the dielectric layer 44, thus the direction of A'. It is incident to. Accordingly, the amount of light blocked by the incident path by the partition wall 47 of FIG. 4 may be reduced, and interference with light generated from pixels of other adjacent cells may be excluded.

FIG. 5 is a cross-sectional view illustrating a portion of a cross section taken along line III-III of FIG. 1 according to another embodiment of the present invention.

The embodiment shown in FIG. 5 is similar to the embodiment of FIG. 4, but differs in that the curved surface 54a formed in the dielectric layer 44 is formed perpendicular to the longitudinal direction of the partition wall 47. In other words, the curved surface 54a formed by forming the dielectric layer 44 convex extends in the same direction as the longitudinal direction of the first electrode 43a. In the embodiment of FIG. 5 the light emitted at the point indicated by the reference P 'is incident radially as indicated by the arrow A, but is refracted once it passes through the curved surface 54a of the dielectric layer 44 and thus of A'. Incident in the direction. In this case, light in which the incident path is blocked or dispersed by the first electrode 43a may be reduced.

6A to 6C schematically illustrate a method of manufacturing a plasma display device having a curved dielectric layer surface.

Referring to FIG. 6A, the front glass substrate 61 on which the first electrode 63 is formed is provided. The transparent first electrode 63 can be formed according to the prior art. The formation of the first electrode 63 according to the prior art will be briefly described as an example. ITO film-forming is formed on the front glass substrate 61, and a photoresist layer is laminated on it. Next, by exposing and developing the photoresist layer using a mask, only the photoresist of the cured predetermined pattern is left. When the ITO film formation having the photoresist of the predetermined pattern on the upper surface is etched through etching, only the ITO layer under the photoresist pattern remains and other portions are removed. The remaining ITO film formation corresponds to the first electrode 63 of the predetermined pattern shown in FIG. 3A on the upper surface of the front glass substrate 61, and is completed by removing the cured predetermined pattern of photoresist.

A dielectric paste layer 62 having a predetermined thickness is formed on a specific site by using a mask having a predetermined pattern on the glass substrate 61 having the first electrode 63 as described above. The dielectric paste layer 62 is intended to form the curved surface of the dielectric layer by relatively thickening a specific portion of the final dielectric layer. Formation of the dielectric paste layer 62 proceeds by applying a paste in a state where a mask (not shown) of a predetermined pattern is disposed on the glass substrate 61 and drying it, until it can be formed to a predetermined thickness. Repeat several times. The portion where the dielectric paste layer 62 is formed corresponds to the portion where the curved surfaces 44a and 54a are formed in FIGS. 4 and 5, respectively.

6B shows that the dielectric paste layer 64 is again formed over the entire upper surface of the glass substrate 61 in which the dielectric paste layer 62 is formed only at a predetermined position. That is, in FIG. 6B, the paste is applied to the entire upper surface of the glass substrate 61 without using a mask. As can be seen from the figure, the portion of the paste layer 62 formed in the previous step (indicated by reference numeral 65) is formed to have a thicker thickness of the dielectric layer 64 than other portions.

When the application of the paste to the entire area of the substrate is finished, the dielectric layer 66 as shown in FIG. 6C may be formed through a subsequent drying and firing process. At this time, the heat applied during the firing process melts the surface of the paste, and thus the paste may have fluidity. This fluidity allows the surface of the dielectric layer 66 to be formed into a curved surface with a predetermined curvature as shown in FIG. 6C. The curvature of the curved surface formed on the surface of the dielectric layer 66 can be adjusted by adjusting the thickness of the dielectric paste layer 62 formed initially. The curved surface 67 formed on the surface of the dielectric layer 66 has a curvature in which light passing therethrough can be focused into parallel light.

7A to 7C illustrate a method of manufacturing a plasma display device according to another embodiment of the present invention.

Referring to FIG. 7A, a dielectric paste layer 72 is first formed on an entire surface of a glass substrate 71 on which a first electrode 73 is provided, and a polishing mask 75 having a predetermined pattern is disposed. The first electrode can be formed according to the method described with reference to FIG. 6A. The dielectric paste layer 72 is formed by applying a paste to the entire surface of the substrate 71 with a uniform thickness and drying it. The anti-polishing mask 75 is for preventing the polishing of the dielectric paste layer 72 to be performed later, and the portions of the dielectric paste layer 72 shielded by the mask 75 are illustrated in the embodiments of FIGS. 4 and 5. Corresponds to the site where curved surfaces 44a and 54a are formed, respectively.

7B shows a state in which a part of the dielectric paste layer is removed by polishing. Spraying a suitable known abrasive particle onto the surface of the dielectric paste layer 72 may reduce the thickness of the surface of the dielectric paste layer 72 that is not shielded with the mask 75, while the thickness of the mask 75 may be reduced. The surface of the shielded dielectric paste layer 72 maintains the original thickness without removing the thickness of the portion. The abrasive is, for example, calcium carbonate (CaCo ₃ ). As a result, a dielectric paste layer indicated at 72 'remains. That is, the thickness of the dielectric paste layer in the portion corresponding to the pixel in the completed display device remains thicker than in other places.

The completed dielectric layer 76 is shown in Fig. 7C, which is formed by firing the dielectric paste layer 72 'shown in Fig. 7B. Heat applied during the firing process may flow the surface of the dielectric paste layer 72 ', and thus the surface is formed of the dielectric layer 76 having a predetermined curvature. The surface of the dielectric layer 76 has a curvature that can focus light passing through it into parallel light.

Plasma display device having a curved surface dielectric layer according to the present invention has the advantage that the brightness of the light path can be focused in parallel, the brightness can be increased, and the interference of light between pixels can be reduced, so that the resolution of the image Has the advantage that increases.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, it is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Could be. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (9)

First and second substrate members; First and second electrodes respectively formed in directions crossing at right angles to opposite inner surfaces of the first and second substrate members; A dielectric layer stacked on the first substrate; A partition member stacked to form a plurality of cells on the second substrate; A phosphor coated on the inside of the partition member; In the plasma display device comprising a; inert gas filled in the plurality of cells, And a surface of the dielectric layer through which the light emitted from the phosphor passes is formed as a curved surface having a predetermined curvature. The plasma display apparatus of claim 1, wherein the light refracted through the curved surface of the dielectric layer is focused as parallel light when passing through the first substrate. The plasma display apparatus of claim 1, wherein the curved surface of the dielectric layer extends in parallel with the lengthwise direction of the partition wall in the plurality of cells. The plasma display apparatus of claim 1, wherein the curved surface of the dielectric layer extends in a direction perpendicular to a length direction of the partition wall in the plurality of cells. Disposing a mask of a predetermined pattern on one surface of the substrate member on which the first electrode is formed and applying a dielectric paste to form a dielectric paste layer of the predetermined pattern, Applying a dielectric paste over the entire area of the surface of the substrate member on which the dielectric paste layer of the predetermined pattern is formed; Firing the dielectric paste layer so that the surface of the dielectric paste layer can flow. The method of manufacturing a plasma display apparatus according to claim 5, wherein the forming of the dielectric paste layer of the predetermined pattern is repeated applying and drying the paste until the predetermined thickness is reached. The method of claim 5, wherein a portion where the dielectric paste layer of the predetermined pattern is formed corresponds to a position of a cell in the completed plasma display apparatus. Forming a dielectric paste layer having a uniform thickness on one surface of the substrate member on which the first electrode is formed, and disposing a polishing pattern mask member of a predetermined pattern thereon; Reducing the thickness of the dielectric paste layer in the portion not shielded by the anti-polishing mask member by spraying abrasive particles onto the surface of the dielectric paste layer; Firing the dielectric paste layer so that the surface of the dielectric paste layer can flow. 9. The method of claim 8, wherein the portion of the plasma display apparatus which is shielded by the anti-polishing mask member corresponds to a position of a cell in the completed plasma display apparatus.