KR100784559B1 - Plasma Display Panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, comprising: a front substrate, which is a display surface on which an image is displayed, a rear substrate disposed to face the front substrate, a partition wall partitioning a discharge cell between the front substrate and the rear substrate, and the discharge cell. When the phosphor layer is formed on the buffer substrate, a buffer discharge cell line is formed on the outermost effective area of the front substrate in which a phosphor layer different from other discharge cell lines is formed.

Accordingly, the present invention forms phosphors for generating white and yellow light corresponding to the R, G, and B discharge cells formed in the effective area in the buffer discharge cell line formed at the outermost part of the effective area, and further By forming a buffer discharge cell line in a part, light generated in the R, G, B discharge cells and the W, Y discharge cells are mixed with each other during light emission, so that streaks do not occur in the R, G, B discharge cells. .

Plasma display panel, phosphor, discharge cell, effective area.

Description

Plasma Display Panel

1 is a diagram showing a structure of an effective area of a conventional plasma display panel.

2 is a view for explaining the structure of a plasma display panel according to the present invention;

3A to 3B are views for explaining the structure of a discharge cell shown in the effective area of the front substrate according to the present invention;

4 is a view for explaining a discharge cell structure of a buffer discharge cell line in accordance with a discharge cell formed in a discharge cell line according to the present invention;

5 is a view for explaining another structure of a discharge cell formed in the buffer discharge cell line in accordance with the discharge cell formed in the discharge cell line according to the present invention;

The present invention relates to a plasma display panel.

In the conventional plasma display panel, a partition wall formed between the front substrate and the rear substrate forms 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.

1 illustrates a structure of an effective area of a conventional plasma display panel.

As illustrated in FIG. 1, a plurality of scan electrode lines Y1 to Yn and sustain electrode lines Z1 to Zn are formed in parallel on a front substrate of a conventional plasma display panel, and address electrode lines X1 to Zn on a rear substrate. Xn are formed in the direction crossing the scan electrode line Y and the sustain electrode line Z. As shown in FIG. At this time, discharge cells 120 are formed around the crossing points. These discharge cells 120 include a plurality of discharge cells coated with different phosphors, such as red, green, and blue discharge cells, and include red, green, and blue discharge cells. Blue discharge cells gather to form a pixel.

As described above, when discharge occurs in the discharge cell 120 formed at the intersection of the scan electrode line Y, the sustain electrode line Z, and the address electrode line X, the phosphor layer formed in the discharge cell 120. By generating this visible light, a predetermined image is displayed in an active area of the plasma display panel.

Here, each of the red (R), green (G), and blue (B) phosphors applied to the red (R), green (G), and blue (B) discharge cells of the effective region 150 has a different visible light. Generates. For example, the red (R) phosphor generates red (R) light, the green (G) phosphor generates green (G) light, and the blue (B) phosphor layer generates blue (B) light. The red (R), green (G), and blue (B) light is mixed to realize various colors of the image.

On the other hand, the light generated in the discharge cells formed in the outermost portions 130 and 140 of the effective region 150 does not mix with the light of other colors, and appears to have the original color as it is.

For example, when the red (R) discharge cells and the blue (B) discharge cells are formed in the outermost portions 130 and 140 of the effective region 150, the red (R) discharge cells are formed at the outermost portions 130 and 140. And light generated from the blue (B) discharge cells, that is, the red light and the blue light, are seen in the form of stripes 160 and 170 as they are.

Accordingly, there is a problem in that the image quality of the image is deteriorated by streaks seen on the screen of the plasma display panel.

An object of the present invention is to provide a plasma display panel which suppresses deterioration of image quality due to streaks caused by light generated in discharge cells formed at the outermost portions of the effective area.

In order to achieve the above object, the present invention provides a front substrate, which is a display surface for displaying an image, a rear substrate disposed to face the front substrate, a partition wall partitioning a discharge cell between the front substrate and the rear substrate, and the discharge cell. And a buffer discharge cell line formed on the effective region of the front substrate, wherein a buffer discharge cell line is formed on which the phosphor layer different from the other discharge cell lines is formed.

In addition, the buffer discharge cell line is characterized in that formed on the outermost on the effective area.

In addition, the display surface of the front substrate is divided into an effective region and a dummy region, and the buffer discharge cell line is formed at a part of the dummy region and at the top of the effective region.

In addition, the phosphor layer formed on the buffer discharge cell line is characterized in that the light emitted from the white (White) light.

In addition, the phosphor layer formed on the buffer discharge cell line is characterized in that it emits light with yellow light.

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

2 is a view for explaining the structure of a plasma display panel according to the present invention.

Referring to FIG. 2, the plasma display panel of the present invention forms a front panel 20 and a rear surface of which a scan electrode 201 and a sustain electrode 202 are paired to the front substrate 200, which is a display surface on which an image is displayed. The rear panel 21 having the plurality of address electrodes 212 arranged on the rear substrate 210 to intersect the scan electrode 201 and the sustain electrode 202 is coupled in parallel with a predetermined distance therebetween.

The front panel 20 is formed of a scan electrode 201 and a sustain electrode 202, that is, transparent electrodes 201a and 202a 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 201 and the sustain electrode 202 provided with the produced bus electrodes 201b and 202b are included. The scan electrode 201 and the sustain electrode 202 are covered by an upper dielectric layer 203 that limits the discharge current and insulates the electrode pairs, and is oxidized on the top of the dielectric layer 203 to facilitate the discharge conditions. A protective layer 204 on which magnesium (MgO) is deposited is formed.

The rear panel 21 is arranged in such a manner that a plurality of discharge spaces, that is, barrier ribs 211 of stripe type (or well type) for forming discharge cells R, G, and B are maintained in parallel. In addition, a plurality of address electrodes 212 are disposed to generate vacuum ultraviolet rays by performing address discharge. On the upper side of the rear panel 21, R, G, B phosphor layers 213 are formed which emit visible light for image display upon address discharge. A lower dielectric 214 is formed between the address electrode 212 and the phosphor layer 213 to protect the address electrode 212 and reflect visible light emitted from the phosphor layer 213 toward the front panel 20.

Here, an effective area for displaying a screen exists on the front substrate. A plurality of discharge cells are formed in such an effective area to display an image during discharge. The structure of the discharge cells formed in the effective area is shown in FIGS. 3A to 3B.

3A to 3B are views for explaining the structure of the discharge cell shown in the effective region of the front substrate according to the present invention.

Referring to FIG. 3A, a plurality of discharge cells R, G, and B are formed in the effective region of the front substrate. Among the plurality of discharge cells R, G, and B, the discharge cells are formed in the outermost portion of the effective area 300 and are referred to as buffer discharge cell lines 320, 330, 340, and 350. The discharge cell lines 360 including the remaining R, G, and B discharge cells except for the outermost discharge cells W and Y are referred to as discharge cell lines 360. In this case, the buffer discharge cell lines 320, 330, 340, and 350 are basically formed at left and right sides adjacent to the discharge cell line 360, and may be additionally formed at upper and lower sides, but may not be formed.

Here, the plurality of discharge cells W and Y formed in the buffer discharge cell lines 320, 330, 340 and 350 and the plurality of discharge cells R, G and B formed in the discharge cell line 360 are different from each other. It has the light emission characteristic of the phosphor.

That is, the discharge cells W and Y formed in the buffer discharge cell lines 320, 330, 340, and 350 may emit white light or white phosphors emitting white light or yellow light. Yellow is applied. Accordingly, light generated in the discharge cells W and Y formed in the buffer discharge cell lines 320, 330, 340, and 350 is generated in the R, G, and B discharge cells formed at the outermost portions of the discharge cell lines 360. By combining the light, it is possible to prevent the light generated in the outermost discharge cells of the effective area in the form of stripes as in the prior art.

In other words, since light is collected between the R, G, and B shaped bodies and the Y and W shaped bodies, the discharge cells R, G, and B formed at the outermost portion of the discharge cell line 360 of the effective region 300. Streaks occurring in the field can be suppressed. Accordingly, the effective area of the plasma display panel may be relatively large, and the image quality due to the streaks may be prevented from being deteriorated.

For example, the phosphors of the discharge cells W and Y formed in the left and right buffer discharge cell lines 340 and 350 emit white or yellow light and discharge cells R formed in the discharge cell line 360. Phosphors of the discharge cells R and B formed at the outermost sides of G and B emit light with red and blue light.

Similarly, the discharge cells W and Y formed on the upper and lower buffer discharge cell lines 320 and 330 are formed with phosphors emitting white or yellow light, and the outermost sides of the discharge cell lines 360 adjacent thereto are formed. The discharge cells R, G, and B formed in the R, G, and B phosphors are formed.

Here, the discharge cell line 360 and the buffer discharge cell lines 320, 330, 340, and 350 are described as being formed only in the effective region 300. However, the discharge cells W and Y formed in the buffer discharge cell lines 320, 330, 340, and 350 may be formed in a part of the dummy region. In this case, the dummy area refers to an area other than a display surface on which an image is displayed. This is shown in Figure 3b.

Referring to FIG. 3B, a plurality of W, Y discharge cells and R, G, B discharge cells are formed in the effective region 300 of the front substrate. Among the plurality of discharge cells W, Y, R, G, and B, the discharge cell line includes R, G, and B discharge cells except for the W and Y discharge cells. On the other hand, the W and Y discharge cells formed at the outermost portion of the effective region 300 of the front substrate and the W and Y discharge cells formed at a part of the dummy region 310 are referred to as a buffer discharge cell line. Thus, although the buffer discharge cell lines 320, 330, 340, and 350 described with reference to FIG. 3A are formed only at the outermost side of the effective area 300, the buffer discharge cell lines may also be formed in a part of the dummy area 310. .

The buffer discharge cell line of the effective region 300 is basically formed left and right adjacent to the discharge cell line, and may be additionally formed up and down, but may not be formed. In addition, a buffer discharge cell line formed in a portion of the dummy region 310 is formed adjacent to the buffer discharge cell line of the effective region 300.

Here, the W and Y discharge cells formed in the buffer discharge cell lines of the effective area 300 and the dummy area 310 emit light with white light or yellow light and discharge cells R and G formed in the discharge cell line. When the light of the red phosphor and the blue phosphor are generated in the discharge cells formed at the outermost left and right sides of B and B, for example, the R and B discharge cells, the light is mixed with each other, resulting in red and blue streaks in the image representation. Will not be.

In addition, since a buffer discharge cell line is formed in a part of the dummy region 310, red stripes and blue stripes do not occur.

On the other hand, as described above, the discharge cells (W, Y) formed in the buffer discharge cell line is formed on the discharge cells the same as any one of the phosphor that emits light of the white-based or yellow-based light, but differently buffer Each of the discharge cells formed in the discharge cell line can form a phosphor that emits light of a different color. An example of this is described in FIG. 4.

4 is a view for explaining the discharge cell structure of the buffer discharge cell line in accordance with the discharge cell formed in the discharge cell line according to the present invention.

4 is a view showing W formed on R and B discharge cells and buffer discharge cell lines 340 and 350 formed at the outermost sides of the left and right of the discharge cells formed on the discharge cell line 360 described with reference to FIG. Compare the Y discharge cells. In this case, in the case of the W discharge cell, a phosphor that emits light with white light is formed, and in the case of the Y discharge cell, a phosphor that emits light with yellow light is formed.

First, as shown in FIG. 4A, the W discharge cells and the Y discharge cells may be formed in the buffer discharge cell line 440 corresponding to the R discharge cells formed in the discharge cell line 460. That is, W discharge cells are formed in the buffer discharge cell line 440 in response to the odd-numbered R discharge cells formed in the discharge cell line 460, and buffers correspond to the even-numbered R discharge cells formed in the discharge cell line 460. Y discharge cells may be formed in the discharge cell line 440.

Therefore, when light is emitted between the W discharge cell and the R discharge cell and between the Y discharge cell and the R discharge cell, red stripes are generated in the R discharge cells formed in the discharge cell line 460 by collecting light. It doesn't work.

In addition, unlike the above, as shown in FIG. 4B, Y discharge cells are formed in the buffer discharge cell line 440 corresponding to the odd-numbered R discharge cells formed in the discharge cell line 460, and the discharge cell line ( W discharge cells may be formed in the buffer discharge cell line 440 to correspond to the even-numbered R discharge cells formed in 460.

In addition, unlike the above, as shown in FIG. 4C, when the B discharge cells are formed in the discharge cell line 460, the W discharge cells are formed in the buffer discharge cell line 440 corresponding to the odd B discharge cells. Y discharge cells may be formed in the buffer discharge cell line 440 corresponding to even-numbered B discharge cells.

Therefore, when light is emitted between the W discharge cell and the B discharge cell, and between the Y discharge cell and the B discharge cell, light is mixed with each other so that blue stripes do not occur.

In addition, unlike the above, as shown in FIG. 4D, when B discharge cells are formed in the discharge cell line 460, Y discharge cells are formed in the buffer discharge cell line 440 corresponding to the odd-numbered B discharge cells. W discharge cells may be formed in the buffer discharge cell line 440 corresponding to even-numbered B discharge cells.

Meanwhile, the W discharge cells and the Y discharge cells may be formed in the buffer discharge cell line when the R, G, and B discharge cells are formed at the top and bottom of the discharge cells formed in the outermost part of the discharge cell line described above with reference to FIG. 3A. This will be described with reference to FIG. 5 as follows.

5 is a view for explaining another structure of a discharge cell formed in the buffer discharge cell line according to the discharge cell formed in the discharge cell line according to the present invention.

FIG. 5 compares R, G, and B discharge cells formed at the outermost top and bottom of the discharge cells formed in the discharge cell line described with reference to FIG. 3A with W and Y discharge cells formed in the buffer discharge cell line adjacent thereto. In this case, a phosphor that emits light with white light when emitting light is formed in the W discharge cell, and a phosphor that emits light with yellow light when emitting light is formed in the Y discharge cell.

First, as shown in FIG. 5A, the W discharge cells and the Y discharge cells are formed in the buffer discharge cell line 540 corresponding to the R, G, and B discharge cells formed in the discharge cell line 560.

That is, W discharge cells may be formed in the buffer discharge cell line 540 in response to the first, third, and fifth R, B, and G discharge cells formed in the discharge cell line 560. In addition, Y discharge cells may be formed in the buffer discharge cell line 540 corresponding to the second, fourth, sixth G, R, and B discharge cells formed in the discharge cell line 560.

In addition, unlike the above, as shown in FIG. 5B, the buffer discharge cell line 540 corresponds to the first, third, and fifth R, B, and G discharge cells formed in the discharge cell line 560. Discharge cells may be formed. In addition, W discharge cells may be formed in the buffer discharge cell line 540 corresponding to the second, fourth, sixth G, R, and B discharge cells formed in the discharge cell line 560.

In addition, unlike the above, as shown in FIG. 5C, the buffer discharge cell line 540 corresponds to the first, second, third R, G, and B discharge cells formed in the discharge cell line 560. Discharge cells may be formed. In addition, Y discharge cells may be formed in the buffer discharge cell line 540 corresponding to the fourth, fifth, sixth R, G, and B discharge cells formed in the discharge cell line 560.

As described above with reference to FIGS. 4 and 5, different discharge cells may be formed in each discharge cell formed in the buffer discharge cell line corresponding to each of the R, G, and B discharge cells formed in the discharge cell line. . Therefore, each of the discharge cells formed in the buffer discharge cell line may have different phosphors emitting light of white and yellow light.

As described above, the technical configuration of the present invention described above will 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 All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, the present invention forms a phosphor that emits light of a white series and a yellow series corresponding to the R, G, B discharge cells formed in the effective region in a buffer discharge cell line formed at the outermost portion of the effective region, and By forming a buffer discharge cell line in a part of the dummy region, the light generated in the R, G, B discharge cells and the W, Y discharge cells are mixed with each other during light emission, so that streaks do not occur in the R, G, B discharge cells. It works.

Claims (5)

Front substrate; A rear substrate disposed to face the front substrate; A partition wall partitioning a discharge cell between the front substrate and the rear substrate; And A phosphor layer formed on the discharge cell; Including, The discharge cells are disposed in an active area in which an image is displayed, and an effective discharge cell in which a phosphor layer emitting red, green, or blue light is formed. and, A plasma display disposed between a dummy area outside the effective area and the effective discharge cells, the plasma display including at least one buffer discharge cell in which a phosphor layer emitting light different from red, green, and blue light is formed; panel. The method of claim 1, And the buffer discharge cell is formed on the outermost side of the effective area. The method of claim 1, At least one buffer discharge cell is formed at a part of the dummy area and at the outermost part of the effective area, respectively. The method of claim 1, And a phosphor layer formed on the buffer discharge cell is a white phosphor layer emitting white light. The method of claim 1, And a phosphor layer formed in the buffer discharge cell is a yellow phosphor layer emitting yellow light.

Images