KR100229076B1 - Ac color plasma display panel - Google Patents

Abstract

According to the present invention, a protrusion is formed on the back substrate of the entire cell or a part of the cells having low luminance, and an address electrode and a phosphor layer are stacked on the protrusion to increase the area of the address electrode and the phosphor layer, thereby increasing the luminance of the entire cell. The present invention relates to an AC color plasma display panel in which the luminance of some cells is increased or the luminance of some cells is compensated. The protruding portions formed in the entire cells or in some cells having low luminance due to the characteristics of the phosphors increase the area where each address electrode and the phosphor layer are formed. Since the luminance of the cell is increased or the luminance of some cells is compensated similarly to the other cells, a full color gray scale and accurate white (white) of 256 gray or more can be realized, and colors close to natural colors can be realized due to high color purity. This has the effect of being improved.

Description

AC color plasma display panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC color plasma display panel, and in particular, a protrusion is formed on a back substrate of a whole cell or a part of a cell having low luminance, and an address electrode and a phosphor layer are stacked on the protrusion to form the address electrode and the phosphor layer. An area of the present invention relates to an AC color plasma display panel in which the luminance of all cells is increased or the luminance of some cells is compensated.

In general, a color plasma display panel is a light emitting device that displays a color image by using a gas discharge phenomenon occurring inside each discharge cell. The manufacturing process is simple, the screen is easy to be enlarged, and the response speed is large. BACKGROUND OF THE INVENTION A direct view type image display device having a screen, in particular, has been spotlighted as a display element of an image display device for the HDTV (High Definition TeleVision) era.

In addition, the color plasma display panel may be largely divided into an AC (Alternating Current) type and a DC (Direct Current) type, that is, an AC color plasma display panel and a DC voltage driven by a sine wave AC voltage or a pulse voltage. It is divided into a DC color plasma display panel that is driven.

The panel of Fujitsu, Japan, which is one of the AC color plasma display panels according to the prior art, has a front distance 51 and a predetermined distance between the front substrate 51 and the front substrate 51, as shown in Figs. A rear substrate 52 disposed in parallel with each other, a plurality of partition walls 53 formed at predetermined intervals between the front substrate 51 and the rear substrate 52, and a rear substrate of the front substrate 51 ( 52 and a plurality of first and second storage electrode pairs 54 and 55 arranged and arranged at predetermined intervals so as to be orthogonal to the partition 53 on the opposite surface to the partition 53, and the back substrate 51 between the partition 53. A plurality of R and G alternately formed on the plurality of address electrodes 56 formed thereon, and on the back substrate 52 and the address electrodes 56 between the partition walls 53, and on side portions of the partition walls 53, respectively. And B phosphor layers 57a, 57b, 57c.

In the above, both the front substrate 51 and the rear substrate 52 are formed of glass, and the plurality of partition walls 53 separate R, G, and B cells and prevent crosstalk between cells. The entire R, G, and B cells are arranged in a stripe type by the partition 53 and the first and second storage electrode pairs 54 and 55.

In addition, a dielectric layer 58 is formed on the plurality of first and second sustain electrode pairs 54 and 55 and the front substrate 51 to limit the discharge current of each cell. A magnesium oxide (MgO) protective film 59 is formed to protect the first and second sustain electrode pairs 54 and 55 and the dielectric layer 58 from sputtering that occurs during discharge. Gas is injected.

A process of displaying an image on one cell (for example, cell B) of the AC color plasma display panel according to the related art configured as described above is as follows.

First, when a specific pulse voltage is applied to the first and second sustain electrode pairs 54 and 55, a discharge occurs between the first and second sustain electrodes 54 and 55 so that the B phosphor layer 57c and the dielectric layer ( 58) Wall charges are formed on them.

Thereafter, when a specific pulse voltage is applied to the first and second sustain electrode pairs 54 and 55 and the address electrode 56, an address is formed between the first and second sustain electrode pairs 54 and 55 and the address electrode 56. As a result of discharge, the discharge gas injected into the discharge space is ionized by electrons and ions and becomes a plasma state.

In addition, particles excited by the collision in the plasma state fall to the ground state and emit ultraviolet rays toward the B phosphor layer 57c, and the B phosphor layer 57c is excited by the collision of ultraviolet rays to emit blue visible light. The blue visible light is emitted to the outside through the front substrate 51.

Subsequently, when a specific pulse voltage is applied to the first and second sustain electrode pairs 54 and 55, sustain discharge occurs between the first and second sustain electrodes 54 and 55, and the address discharge immediately before is maintained for a predetermined time. The image is displayed.

The above image display process is similarly applied to the R cell and the G cell.

Meanwhile, R, G, and B phosphors constituting the R, G, and B phosphor layers 57a, 57b, and 57c have different luminous efficiency and afterglow time, and thus R formed in R, G, and B cells as shown in FIG. If the areas of the G, B phosphor layers 57a, 57b, 57c are the same, a difference occurs in the luminance of each cell.

That is, since the luminous efficiency and the afterglow time of the R, G, and B phosphors are known, since the G phosphor> R phosphor> B phosphor, the formation area of the R, G, B phosphor layers 57a, 57b, 57c is the same. The luminance of the cell is also G cell> R cell> B cell.

In addition, the R, G, and B cells are generally low in brightness due to the internal electrode structure, and thus, each level between red, green, blue, and white in the color coordinates of the plasma display panel does not reach an ideal level as shown in FIG. Full color gray scale (gray) or more was difficult to implement, and the brightness of the B cell is lower than that of the R and G cells due to the characteristics of the phosphor, so that the position of the white point is changed as shown in FIG. It was unstable and the color purity of the whole screen was low.

As described above, the AC color plasma display panel according to the prior art has a low luminance as a whole due to the internal electrode structure of each cell, and a luminance difference occurs between R, G, and B cells due to the characteristics of the phosphor, and thus, a full color gray scale of 256 gray or more cannot be realized. , White (white) is not displayed correctly, and the color purity of the entire screen is low, there was a problem that the image quality is bad.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the area of the address electrode and the phosphor layer of some cells having low luminance due to the characteristics of all cells or phosphors is increased to increase the luminance of all cells or compensate the luminance of some cells. Accordingly, an object of the present invention is to provide a full color gray scale of 256 gray or more and accurate white (white), and to provide an AC color plasma display panel with high color purity.

1 is an exploded perspective view of an AC color plasma display panel according to the prior art;

FIG. 2 is a side cross-sectional view of one pixel of the AC color plasma display panel shown in FIG. 1 (but the front substrate is rotated 90 °);

3 is a view showing color coordinates for a plasma display panel of the prior art;

4, 5, and 6 are side cross-sectional views of one pixel of the AC color plasma display panel according to the first, second, and third embodiments of the present invention (however, the front substrate is rotated by 90 °).

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

1, 11, 21: front substrate 2, 12, 22: back substrate

3, 13, 23: partition 7a, 17a, 27a: R (Red) phosphor layer

7b, 17b, 27b: G (Green) phosphor layer 7c, 17c, 27c: B (Blue) phosphor layer

3a, 3b, 3c, 13a, 13b, 13c, 23a, 23b, 23c: protrusion

6a, 6b, 6c, 16a, 16b, 16c, 26a, 26b, 26c: address electrode

In order to achieve the above object, the AC color plasma display panel according to the present invention is formed between the front substrate and the back substrate, which are disposed in parallel with a predetermined distance therebetween, and is formed between the front substrate and the back substrate, and the entire screen is R (Red). ), A plurality of partition walls divided into G (Green) and B (Blue) cells, a plurality of first and second storage electrode pairs formed on the opposite surface of the front substrate to the rear substrate so as to be orthogonal to the partition wall, A plurality of address electrodes for inducing discharge together with a pair of one and two sustain electrodes, and a plurality of R, G, B phosphor layers emitting red, green, and blue visible light, respectively, when the R, G, and B cells are discharged. In the AC color plasma display panel, each of the R, G, and B cells has a protrusion having a height lower than that of the barrier rib on the rear substrate between the barrier ribs on both sides, and the rear substrate and the protrusion between the barrier ribs. The address electrodes are respectively formed on the upper side and a part of side surfaces of the both side partition walls, and phosphor layers of the corresponding color among the R, G, and B phosphor layers are formed on the respective address electrodes.

According to an embodiment of the present invention, the protrusions formed on the cells having low luminance among the R, G, and B cells due to the characteristics of the phosphor are higher in height, higher in height and width, wider, or wider than the protrusions formed in the remaining cells. .

The address electrode formed in the cell having low luminance and the phosphor layer of the corresponding color are formed wider on the side surfaces of both partition walls than the address electrode formed in the remaining cells and the phosphor layer.

The protrusion is formed using the same material as that of the barrier rib, and is formed at least one of each of the R, G, and B cells.

In addition, the AC color plasma display panel according to the present invention is formed between the front substrate and the back substrate, which are disposed in parallel with a predetermined distance therebetween, and the plurality of screens formed between the front substrate and the rear substrate to divide the entire screen into R, G and B cells. A plurality of barrier ribs, a plurality of first and second storage electrode pairs formed on the opposite surface of the front substrate to the rear substrate, and the first and second storage electrode pairs to induce discharge together with the first and second storage electrode pairs. An AC color plasma display panel including an electrode and a plurality of R, G, and B phosphor layers emitting red, green, and blue visible light, respectively, upon discharge of the R, G, and B cells, wherein the R, G, B cells Due to the characteristics of the phosphor, a cell having a low luminance has a protrusion having a lower height than the barrier rib formed on the rear substrate between the barrier ribs on both sides, and on the rear substrate and the protrusion between the barrier ribs and the amount. Wherein the address electrodes are formed on the side portion of the partition wall, characterized in that the R, G, having a phosphor layer of the color of the B phosphor layer over the address electrodes.

According to another embodiment of the present invention, the protrusion is formed using the same material as the partition wall.

Hereinafter, a preferred embodiment of an AC color plasma display panel according to the present invention will be described in detail with reference to the accompanying drawings.

First, an AC color plasma display panel according to a preferred embodiment of the present invention includes a front substrate, which is a display surface of an image, a rear substrate disposed in parallel with a predetermined distance from the front substrate, and between the front substrate and the rear substrate. A plurality of partition walls arranged and arranged at predetermined intervals, a plurality of first and second storage electrode pairs arranged and arranged at predetermined intervals so as to be orthogonal to the partition walls on opposite surfaces of the front substrate among the front substrates, and the plurality of partition walls. A plurality of address electrodes each formed to induce address discharge together with the first and second sustain electrode pairs, and a plurality of Rs alternately formed on the plurality of address electrodes to emit red, green, and blue visible light during discharge; G and B phosphor layers are provided.

As described above, the plurality of partition walls and the first and second storage electrode pairs divide the entire screen into a plurality of R, G, and B cells arranged in a stripe type.

Further, a dielectric layer for limiting discharge current of each cell is formed on the plurality of first and second storage electrode pairs and the front substrate, and the first and second storage electrode pairs and the dielectric layer are formed on the dielectric layer from sputtering occurring during discharge of each cell. A magnesium oxide (MgO) protective film is formed to protect the metal, and a discharge gas is injected into the discharge space of each cell.

<First Embodiment>

The configuration of the AC color plasma display panel according to the first embodiment of the present invention will be described with reference to side cross-sectional views of R, G, and B cells (one pixel) shown in FIG.

The R, G, and B cells shown in FIG. 4 include the front substrate 1, the back substrate 2, the partition walls 3, the first and second sustain electrodes 4 and 5 described above, It is composed of address electrodes 6a, 6b, 6c, R, G, and B phosphor layers 7a, 7b, 7c, dielectric layer 8, and magnesium oxide (MgO) protective film 9.

In each of the R, G, and B cells, protrusions 3a, 3b, and 3c having a lower height than the barrier rib 3 are formed on the rear substrate 2 between the barrier ribs 3, respectively. The address electrodes 6a, 6b, and 6c are formed on the back substrate 2 and the protrusions 3a, 3b, and 3c between the two and the side partitions of the two side partitions 3, respectively, and each of the address electrodes 6a, The phosphor layers (R cell-> 7a, G cell-> 7b, B cell-> 7c) of the corresponding color among R, G, and B phosphor layers 7a, 7b, and 7c are formed on 6b and 6c, respectively.

Referring to the operation and effect of the first embodiment of the present invention configured as described above are as follows.

In the first embodiment of the present invention, the area of the address electrodes 6a, 6b, 6c and R, G, B phosphor layers 7a, 7b, 7c formed in the R, G, B cells is formed on the back substrate 2. The area corresponding to the protrusions 3a, 3b, and 3c is wider than the conventional one, so that the discharge region and the light emitting region are also larger than the conventional one.

Therefore, the first embodiment of the present invention is more than conventional on the R, G, B phosphor layers 7a, 7b, 7c and dielectric layer 8 in the process of forming wall charge of each cell described in the prior art image display process. Wall charges can be formed to lower the drive voltage of the address discharge performed next.

In addition, in the address discharge process occurring between the first and second sustain electrode pairs 4 and 5 and the address electrodes 6a, 6b, and 6c of each cell, R, G, and B phosphor layers 7a, 7b, and 7c due to ultraviolet rays. Excitation amount is increased significantly compared with the prior art.

That is, the area of the R, G, and B phosphor layers 7a, 7b, and 7c formed in each cell increases by an area corresponding to the protrusions 3a, 3b, and 3c, and the R, G, and B phosphor layers 7a, 7b, and 7c. Of the R, G, and B phosphor layers 7a, 7b, and 7c formed in the space between the barrier ribs 3 and the protrusions 3a, 3b, and 3c are different from each other by ultraviolet rays and visible light. By re-excitation several times at an angle, the excitation amounts of the R, G, and B phosphor layers 7a, 7b, and 7c are weighted. Therefore, the luminance of the R, G, and B cells is significantly higher than in the prior art.

In addition, as described above, the discharge and light emitting regions of each cell also exist in the sustain discharge process of maintaining the address discharge that occurred immediately before the sustain discharge occurs between the first and second sustain electrode pairs 4 and 5 of each cell for a predetermined time. The increase in brightness with increase is realized.

As described above, in the first embodiment of the present invention, since the luminance (brightness) of all the cells is increased compared with the conventional, each level between red, green, blue and white in the color coordinates for the plasma display panel shown in FIG. Even larger, full color gray scales of 256 or more can be easily implemented.

When the luminance of the R, G, and B cells is increased as a whole, the white balance of the R, G, and B colors can be easily adjusted, thereby enabling accurate white (white) implementation.

Meanwhile, the protrusions 3a, 3b, and 3c may be formed using the same material as the partition wall 3, and may be formed in various shapes (for example, hemispherical shape) as well as the quadrangle illustrated in FIG. 4. Although not shown in the drawings, one or more R, G, and B cells may be formed.

When the number of protrusions 3a, 3b, and 3c formed in each cell is large, the area of the address electrodes 6a, 6b, and 6c and the R, G, and B phosphor layers 7a, 7b, and 7c becomes wider, and the luminance is increased. This makes it easier to implement a full color grayscale of 256 or more grays and to adjust the white balance.

Second Embodiment

The configuration of the AC color plasma display panel according to the second embodiment of the present invention will be described with reference to side cross-sectional views of R, G, and B cells (one pixel) shown in FIG.

The R, G, and B cells shown in FIG. 5 include the front substrate 11, the back substrate 12, the partition 13, the first and second sustain electrodes 14 and 15 described above, The address electrodes 16a, 16b and 16c, the R, G and B phosphor layers 17a, 17b and 17c, the dielectric layer 18 and the magnesium oxide (MgO) protective film 19 are provided.

The B cells having the lowest luminance among the R, G, and B cells due to the characteristics of the phosphors are provided with protrusions 13c having a height lower than that of the barrier ribs 13 on the rear substrate 12 between the barrier ribs 13 on both sides. An address electrode 16c is formed on the back substrate 12 and the protrusion 13c between the two side partitions 13 and on a part of the side surfaces of the both side partitions 13, and the B phosphor layer 17c on the address electrode 16c. Is formed, and the address electrodes 16a and 16b and the R and G phosphor layers 17a and 17b of the remaining R and G cells are formed in the same structure as in the prior art.

Referring to the operation and effect of the second embodiment of the present invention configured as described above are as follows.

According to the second exemplary embodiment of the present invention, the protrusion 13c having the area of the address electrode 16c and the B phosphor layer 17c of the B cell having the lowest luminance among the R, G, and B cells having the lowest luminance is formed on the rear substrate 12. The area corresponding to) becomes wider than before, and the discharge area and the light emitting area also increase in size.

Therefore, in the second embodiment of the present invention, the brightness of the B cell is compensated to be similar to that of the R and G cells, that is, the level between blue and white in the color coordinates for the plasma display panel shown in FIG. Because it is close to the ideal value, accurate white (white) can be realized, and since color purity is higher than that of the related art, a color close to natural color can be realized.

In addition, the protruding portion 13c formed in the B cell is formed using the same material as the partition wall 13 as in the first embodiment of the present invention described above, and has various shapes as well as the quadrangle shown in FIG. (Eg, hemispherical).

Third Embodiment

The configuration of the AC color plasma display panel according to the third embodiment of the present invention will be described with reference to side cross-sectional views of R, G, and B cells (one pixel) shown in FIG.

The R, G, and B cells shown in FIG. 6 include the front substrate 21, the back substrate 22, the partition wall 23, the first and second sustain electrodes 24 and 25 described above, Address electrodes 26a, 26b, 26c, R, G, and B phosphor layers 27a, 27b, 27c, dielectric layer 28, and magnesium oxide (MgO) protective film 29 are provided.

In the R, G, and B cells, protrusions 23a, 23b, and 23c having a lower height than the barrier ribs 23 are formed on the rear substrate 22 between the barrier ribs 23 and the barrier ribs 23, respectively. Address electrodes 26a, 26b, and 26c are formed on the back substrate 22 and the protrusions 23a, 23b, and 23c between them and on portions of the sidewalls 23, respectively, and the address electrodes 26a and 26b, respectively. , A phosphor layer (R cell-> 27a, G cell-> 27b, B cell-> 27c) of the corresponding color among the R, G, and B phosphor layers 27a, 27b, and 27c is formed, respectively.

In addition, the protrusion 23c formed on the rear substrate 22 of the B cell having the lowest luminance among the R, G, and B cells has a higher height than the protrusions 23a and 23b formed on the R and G cells. The address electrode 26c and the B phosphor layer 27c of the B cell are wider on the sides of both partition walls 23 than the address electrodes 26a and 26b of the R and G cells and the R and G phosphor layers 27a and 27b. Formed.

Referring to the operation and effect of the third embodiment of the present invention configured as described above are as follows.

In the third embodiment of the present invention, the address electrodes 26a, 26b, 26c of the R, G, and B cells and the R, G, B phosphor layers 27a, 27b, 27c are respectively provided on the protrusions 23a, 23b, 23c. As the corresponding area becomes wider than before, the luminance increases as the discharge region and the emission region of each cell increase, and at the same time, the address electrodes 26c and B of the B cells having the lowest luminance according to the characteristics of the phosphor among the R, G, and B cells. The area of the phosphor layer 27c is wider than the areas of the address electrodes 26a and 26b and the R and G phosphor layers 27a and 27b formed in the remaining R and G cells, so that the brightness of the B cell is the same as that of the R and G cells. Similarly compensated.

Therefore, in the third embodiment of the present invention, as shown in the first embodiment of the present invention described above, the luminance of the R, G, and B cells is increased as a whole, and as shown in the second embodiment of the present invention, the R, G, and B cells are similar to each other. Since there is almost no luminance difference, in the color coordinates for the plasma display panel shown in FIG. 3, each level between red, green, blue, and white increases more than before, while the level between blue and white increases more than the level between red, green, and white, and 256 gray. The above full color gray scale can be easily implemented, and the white balance of R, G, and B colors can be easily adjusted to realize accurate white (white), and the color purity is higher than that of the prior art, so that colors close to natural colors can be realized. have.

On the other hand, each of the protrusions 23a, 23b, 23c is formed using the same material as the partition wall 23, as in the first and second embodiments of the present invention described above, and other than the quadrangle shown in FIG. It may be formed in various shapes (eg, hemispherical), and although not shown in the drawings, one or more cells may be formed in each of R, G, and B cells.

When the number of protrusions 23a, 23b, and 23c formed in each cell is large, the area of the address electrodes 26a, 26b, and 26c and the R, G, and B phosphor layers 27a, 27b, and 27c are further widened and the luminance is increased. This makes it easier to implement a full color grayscale of 256 or more grays and to adjust the white balance.

In addition, although not shown in the drawings, the protrusions formed in the B cell having the lowest luminance among the R, G, and B cells due to the characteristics of the phosphor are wider than the protrusions formed in the remaining cells, or even if both the height and the width are increased. Actions and effects as described can be obtained.

As described above, the AC color plasma display panel according to the present invention has a protruding portion formed in some cells having low luminance due to the characteristics of all cells or phosphors, so that the area of each address electrode and the phosphor layer is widened, and thus the luminance of all cells is increased or partially. Since the luminance of the cell is compensated similarly to the rest of the cell, a full color gray scale and accurate white (white) of 256 gray or more can be realized, and a color close to natural color can be realized with high color purity, thereby improving image quality.

Claims (9)

A plurality of barrier ribs formed between the front substrate and the rear substrate in parallel with a predetermined distance therebetween and separating the entire screen into R (Red), G (Green), and B (Blue) cells; A plurality of first and second storage electrode pairs formed on an opposite surface of the front substrate to the rear substrate so as to be orthogonal to the partition wall, and a plurality of address electrodes for inducing discharge together with the first and second storage electrode pairs; In an AC color plasma display panel having a plurality of R, G, and B phosphor layers emitting red, green, and blue visible light, respectively, when the R, G, and B cells are discharged, the R, G, and B cells are formed on both side partition walls. Projections having a lower height than the barrier ribs are respectively formed on the rear substrate between the barrier ribs, and the address electrodes are respectively formed on the rear substrate and the protrusion between the barrier ribs and the side portions of the barrier ribs. And a phosphor layer of a corresponding color among the R, G, and B phosphor layers is formed on the electrode. The method of claim 1, The protrusion formed in the cell having low luminance among the R, G, and B cells has a height higher than that of the protrusion formed in the remaining cells. The method of claim 2, And a protrusion formed in the cell having low luminance is wider than a protrusion formed in the remaining cells. The method of claim 1, The protrusion formed in the cell having low luminance among the R, G, and B cells is wider than the protrusion formed in the remaining cells. The method according to claim 2, 3 or 4, And the address electrode formed in the cell having low luminance and the phosphor layer of the corresponding color are formed wider on side surfaces of both partition walls than the address electrode formed in the remaining cells and the phosphor layer. The method according to claim 1, 2, 3 or 4, And the protrusion is formed using the same material as that of the barrier rib. The method according to claim 1, 2, 3, 4 or 6, And at least one protrusion is formed at each of the R, G, and B cells. A front substrate and a rear substrate positioned in parallel with a predetermined distance therebetween, a plurality of partition walls formed between the front substrate and the rear substrate to divide the entire screen into R, G, and B cells, and the rear substrate of the front substrate; A plurality of first and second storage electrode pairs formed to be orthogonal to the partition walls on opposite surfaces of the plurality of first and second storage electrode pairs, a plurality of address electrodes for inducing discharge together with the first and second storage electrode pairs, and discharge of the R, G, and B cells. In an AC color plasma display panel including a plurality of R, G, and B phosphor layers emitting red, green, and blue visible light, respectively, cells having low luminance due to the characteristics of phosphors among the R, G, and B cells are disposed between two partition walls. The protrusion having a lower height than the barrier rib is formed on the rear substrate of the barrier rib, and the address electrode is formed on the rear substrate and the protrusion between the barrier ribs on both sides of the barrier rib. Color AC plasma display panel address electrodes to the R, G, having a phosphor layer of the color of the B phosphor layer on which is characterized. The method of claim 8, And the protrusion is formed using the same material as that of the barrier rib.