JP2003022756A - Plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a display performance while making a screen in high definition. SOLUTION: In a plasma display panel, it has a barrier rib 15, which divides electric discharge space in a row direction and a line direction every electric discharge cell C, by a vertical barrier rib 15a, which is arranged between a front glass substrate 10 and a back glass substrate 13, and by a horizontal barrier rib 15b, which is prolonged in the line direction. Moreover, each the row electrode pairs X and Y, which constitute row electrode pairs (X, Y), have bump electrode parts Xa and Ya for every the electric discharging cells C, which are extended to another row electrode direction, which become to the pair from electrode body parts Xb and Yb, which are extended to the row direction, respectively, and counter mutually through a necessary electric discharge gap. Phosphor layers 16 are formed in the vertical barrier rib 15a of the barrier rib 15, which face the electric discharge space in the electric discharge cell C, the horizontal barrier rib 15b, and the surface of the dielectric layer 14 in this order, respective so that all of these five faces may be covered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly to a cell structure of this plasma display panel.

[0002]

2. Description of the Related Art In recent years, a surface discharge type AC plasma display panel has been attracting attention as a large and thin color screen display device, and its spread has been promoted.

FIG. 1 is a front view schematically showing a conventional cell structure of this surface discharge type AC plasma display panel, FIG. 2 is a sectional view taken along line VV of FIG. 1, and FIG. It is sectional drawing in the WW line of FIG.

In FIGS. 1 to 3, a plurality of row electrode pairs (X0, Y0) and a plurality of row electrode pairs (X0, Y0) are formed on the rear surface of the front glass substrate 1 which is the display surface of the plasma display panel. ), And a protective layer 3 made of MgO that covers the back surface of the dielectric layer 2 are provided in this order.

The row electrodes X0 and Y0 are transparent electrodes Xa0 and Ya0 made of a transparent conductive film such as ITO having a wide width.
And bus electrodes Xb0 and Yb0 made of a metal film having a narrow width to supplement the conductivity.

The row electrodes X0 and Y0 are alternately arranged in the column direction so as to face each other across the discharge gap g0, and each row electrode pair (X0, Y0) forms one display line (row) of the matrix display. ) L is constructed.

On the other hand, on the rear glass substrate 4 facing the front glass substrate 1 through the discharge space S0 in which the rare gas is sealed, a plurality of row electrodes X0 and Y0 are arranged so as to extend in a direction orthogonal to the pair of row electrodes X0 and Y0. The column electrode D0, the strip-shaped partition walls 5 formed so as to extend in parallel between the column electrodes D0, and the side surfaces of the partition wall 5 and the column electrodes D0 are covered with R, G, respectively.
And a phosphor layer 6 color-coded B.

Then, in each display line L, the column electrode D0 and the row electrode pair (X0, Y0) intersect with each other, and the discharge space S0 is partitioned by the partition walls 5, so that the discharge cells C0 which are the unit light emitting regions are respectively formed. It is demarcated.

Display of an image on the above-mentioned surface discharge type AC plasma display panel is performed as follows.

That is, first, by address operation, a row electrode pair (X0, Y0) and a column electrode D0 in each discharge cell C0.
Discharge is selectively carried out between the lighted cells (dielectric layer 2
Discharge cells C0 having wall charges formed therein and light-off cells (discharge cells C0 having no wall charges formed in the dielectric layer 2) are distributed on the panel corresponding to the image to be displayed.

After this address operation, a discharge sustaining pulse is alternately applied to the row electrodes X0 and Y0 of each row electrode pair all at once on all the display lines L, and each time the discharge sustaining pulse is applied, lighting is performed. A surface discharge is generated in the cell.

As described above, ultraviolet rays are generated by the surface discharge in the lighting cell, and R, G, and R in the discharge space S0 are generated.
An image to be displayed is formed by exciting each of the B phosphor layers 6 to emit light.

[0013]

In the surface discharge type AC type plasma display panel as described above, as shown in FIG.
As shown in FIG. 3, the phosphor layer 6 is also formed on the side surface of the strip-shaped partition wall 5 to increase the light emitting area in the discharge cell C0, thereby increasing the brightness of the display screen.

However, in the structure of the above-mentioned conventional surface discharge type AC type plasma display panel, when the size of each discharge cell C0 is reduced to increase the definition of the screen, the phosphor layer 6 is changed accordingly. There is a problem that the surface area is reduced and the brightness is reduced.

Further, when the pitch between each row electrode pair (X0, Y0) is narrowed in order to cope with the high definition of the screen, discharge interference occurs in the discharge cells C0 adjacent in the column direction, The problem that erroneous discharge is likely to occur occurs,
Further, there is a problem that an erroneous discharge is likely to occur between the discharge cells C0 adjacent to each other in the row direction.

The present invention has an object to solve the problems in the conventional surface discharge type AC type plasma display panel as described above.

That is, the present invention has one object to increase the definition of the plasma display panel and to improve the display performance. Therefore, it is possible to prevent the deterioration of the brightness and the erroneous discharge in the discharge cell to improve the definition of the screen. It is an object of the present invention to provide a plasma display panel capable of achieving the above.

Furthermore, the present invention provides a display panel capable of preventing the reflection of external light incident on the plasma display panel and improving the contrast of the display screen in order to obtain high definition and improved displayability. The purpose is to do.

[0019]

In order to achieve such an object, the present invention provides, as an invention according to claim 1, in a row direction on a side facing a rear substrate of a front substrate through a discharge space. In a plasma display panel provided with a plurality of row electrode pairs which are arranged in parallel in the extending column direction and each form a display line, and a dielectric layer which covers the row electrode pairs,
A discharge wall is provided between the front substrate and the rear substrate, and a partition wall divides a discharge space into unit light emitting regions in a row direction and a column direction by a vertical wall portion extending in the column direction and a horizontal wall portion extending in the row direction. A phosphor layer is formed on the lateral wall portion and the vertical wall portion of the partition wall facing the unit light emitting region of the space and the surface on the back substrate, and each row electrode forming the row electrode pair has a metal extending in the row direction. An electrode body composed of layers,
Each of the unit light emitting regions in the discharge space is provided with a protruding electrode portion that is formed of transparent conductive films and extends from the electrode body toward the other row electrode that forms a pair and faces each other through a required discharge gap. It is characterized by being.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. The plasma display panel of the first embodiment includes a plurality of front display substrates formed of a glass substrate or the like, which are arranged in parallel in the row direction and arranged in parallel in the column direction on the side facing the rear substrate via the discharge space. Row electrode pairs and a dielectric layer that covers the row electrode pairs. Further, a partition wall is arranged between the front substrate and the rear substrate to divide the discharge space into unit light emitting regions in the row direction and the column direction by the vertical wall portions extending in the column direction and the horizontal wall portions extending in the row direction. . Then, a phosphor layer is formed on the horizontal wall portion and the vertical wall portion of the partition wall facing the unit light emitting region of the discharge space and on the surface on the rear substrate, and each row electrode forming the row electrode pair has a metal extending in the row direction. An electrode body composed of layers and a transparent conductive film that projects from the electrode body in the direction of another row electrode forming a pair for each unit light emitting region in the discharge space and faces each other through a required discharge gap. And a protruding electrode portion configured.

According to the characteristics of the first embodiment, the discharge space between the front substrate and the rear substrate is defined as a unit light emitting region by the partition wall having the vertical wall portion extending in the column direction and the horizontal wall portion extending in the row direction. It is divided for each. Then, the respective row electrodes forming the row electrode pair project from the electrode main body extending in the row direction toward the other row electrodes forming a pair for each unit light emitting region and face each other through a required discharge gap. Electrode portions are provided, and each of the unit light emitting regions, which is divided by the partition wall, is formed into an island shape.

Therefore, since the discharge space between the front substrate and the back substrate is partitioned in the row direction and the column direction for each unit light emitting region by the partition wall, the unit light emitting regions adjacent in the column direction and the row direction are separated from each other. It is possible to prevent erroneous discharge from occurring due to discharge interference, and further, each row electrode forming the row electrode pair is configured to be island-shaped independent for each unit light emitting region. Since the discharge for light emission between the row electrodes is performed independently for each unit light emitting area, even if the size of each unit light emitting area is reduced in order to increase the definition of the image, it is adjacent in the row direction. Therefore, it is possible to prevent the discharge interference from occurring in the unit light emitting region.

Further, in each unit light emitting region, the phosphor layer has a total of five side walls (two surfaces), vertical wall portions (two surfaces) of the partition wall facing the discharge space, and a surface (one surface) on the rear substrate. Since it can be formed, the surface area of the phosphor layer, that is, the light emitting area can be increased. Then, with respect to this enlarged phosphor layer, discharge can be generated in the discharge gap formed between the pair of projecting electrodes, and the phosphor layer on each surface can be caused to emit light by the ultraviolet rays generated from this discharge. Therefore, the brightness of each unit light emitting region is increased. Therefore, even if the size of each unit light emitting region is reduced in order to increase the definition of the screen, the brightness of the display screen does not decrease as compared with the conventional one.

The plasma display panel of the second embodiment is based on the plasma display panel of the first embodiment, and the protruding electrode portions are connected to the wide portion and the electrode body portion which face each other through a discharge gap. It is characterized by having a narrow base end.

According to the plasma display panel of the second embodiment, in addition to the above-mentioned features, the phosphor layers formed on the five faces in total facing the discharge space of each unit light-emitting region can be used in the discharge space. In each of the unit light emitting regions, a pair of island-shaped independent projecting electrodes formed of a narrow base end portion and a wide portion facing each other are formed to project. Therefore, discharge is generated in the discharge gap formed between the wide portions that are overhanging,
Ultraviolet rays generated from this discharge can cause the phosphor layers on each surface to emit light. Accordingly, the brightness of each unit light emitting area can be increased.

The plasma display panel of the third embodiment is based on the plasma display panel of the first embodiment, and includes a pair of row electrodes arranged back to back on the back side of the front substrate between two display lines. A light absorption layer is formed in a portion between the electrode body portions.

According to the plasma display panel of the third embodiment, in addition to the above-mentioned characteristics, the light is incident on a portion between a pair of electrode main bodies arranged back to back between two display lines through the front substrate. Incoming external light is absorbed by the light absorption layer formed in that portion, and reflection of the external light is prevented, so that the contrast of the displayed image can be improved.

As described above, according to the plasma display panel of each of the embodiments of the present invention, it is possible to improve the display performance while achieving high definition of the screen.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A more specific embodiment of the present invention will be described in detail below with reference to the drawings.

[First Embodiment] FIGS. 4 to 8 show a first embodiment of a plasma display panel (hereinafter referred to as PDP) according to the present invention. FIG. 4 shows a PDP.
5 is a front view schematically showing the relationship between the row electrode pairs and the partition walls, FIG. 5 is a sectional view taken along line V1-V1 of FIG. 4, FIG. 6 is a sectional view taken along line V2-V2 of FIG. 4, and FIG. W1 in FIG.
FIG. 8 is a cross-sectional view taken along the line -W1 and FIG. 8 is a cross-sectional view taken along the line W2-W2 in FIG.

4 to 8, a plurality of row electrode pairs (X, Y) are arranged on the back surface of the front glass substrate (front substrate) 10 which is the display surface in the row direction of the front glass substrate 10 (the left and right direction in FIG. 4). ) Are arranged in parallel so as to extend.

The row electrode X has a protruding electrode portion Xa formed of a transparent conductive film such as ITO formed in a T shape by a wide portion and a narrow base end portion, and extends in the row direction of the front glass substrate 10 and protrudes. The electrode main body portion Xb is formed of a metal film forming a bus electrode connected to the narrow base end portion of the electrode portion Xa.

Similarly, the row electrode Y also extends in the row direction of the front glass substrate 10 and the protruding electrode portion Ya formed of a transparent conductive film such as ITO formed in a T shape by the wide portion and the narrow base end portion. And a main electrode portion Yb made of a metal film that forms a bus electrode and is connected to the narrow base end portion of the protruding electrode portion Ya.

The row electrodes X and Y are used for the front glass substrate 10.
Are alternately arranged in the column direction (up and down direction in FIG. 4),
The respective protruding electrode portions Xa and Ya juxtaposed along the electrode body portions Xb and Yb extend toward the row electrode side of the other pair forming a pair, and the top sides of the wide portions of the protruding electrode portions Xa and Ya are respectively They are opposed to each other via a discharge gap g having a required width.

The protruding electrode portions Xa and Ya are formed by vapor-depositing ITO on the front glass substrate 10 and patterning it by photolithography.

The electrode bodies Xb and Yb are respectively composed of black conductive layers Xb1 and Yb1 on the display surface side and a main conductive layer Xb on the back surface side.
It is formed in a two-layer structure of 2, Yb2.

The electrode bodies Xb and Yb are coated with a silver paste mixed with a black pigment and dried, and then a silver paste is further coated on the black silver paste film and dried.
Then, it is formed by patterning by a photolithography method and baking.

On the rear surface of the front glass substrate 10,
The dielectric layer 11 is formed so as to cover the row electrode pair (X, Y), and on the back surface of the dielectric layer 11, the adjacent electrode body portions of the row electrode pairs (X, Y) adjacent to each other are formed. A raised dielectric layer 11A protruding toward the back surface of the dielectric layer 11 at a position facing Xb and Yb and a position facing the region between the adjacent electrode body Xb and electrode body Yb.
Are formed so as to extend parallel to the electrode main body portions Xb and Yb.

The dielectric layer 11 is formed by laminating a film of low melting point glass paste in a predetermined thickness and firing it. The raised dielectric layer 11A has a low melting point on the dielectric layer 11. It is formed by screen-printing a glass paste with a predetermined thickness and firing it.

A protective layer 12 made of MgO is formed on the back side of the dielectric layer 11 and the raised dielectric layer 11A.

On the other hand, the column electrode D is formed on the display side surface of the rear glass substrate 13 arranged in parallel with the front glass substrate 10.
At the positions facing the protruding electrode portions Xa and Ya forming a pair of each row electrode pair (X, Y).
Y) are arranged in parallel at a predetermined interval so as to extend in a direction (column direction) orthogonal to Y).

The column electrodes D are made of Al alloy (for example, Al-
(Mn alloy) is vapor-deposited on the rear glass substrate 13 and patterned by a photolithography method to be formed.

On the display side surface of the rear glass substrate 13,
Further, a white dielectric layer 14 that covers the column electrodes D is formed, and a partition wall 15 is formed on the dielectric layer 14.

The white dielectric layer 14 is formed by applying a glass paste mixed with a white pigment on the rear glass substrate 13 and the column electrodes D and baking the glass paste.

The partition wall 15 has a vertical wall portion 15a extending in the column direction at a position between the column electrodes D arranged in parallel with each other.
And a lateral wall portion 15b extending in the row direction at a position facing the raised dielectric layer 11A.

By the partition wall 15, the discharge space S between the front glass substrate 10 and the rear glass substrate 13 is
A pair of protruding electrode portions X in each row electrode pair (X, Y)
The discharge cells C having a rectangular shape are formed by being divided into portions facing a and Ya, respectively.

The partition wall 15 is formed on the display surface side thereof, but has a two-layer structure of a black layer (light absorbing layer) 151 and a white layer (light reflecting layer) 152 on the back side.
Is configured such that the side wall surface facing to is almost white (that is, the light reflection layer).

The partition wall 15 is formed by applying a low-melting point glass paste mixed with a white pigment and a low-melting point glass paste mixed with a black pigment in this order on the dielectric layer 14 and baking the paste. Layered with a film-like resist, exposed and developed with a double-sided mask to form double-sided openings in the resist layer), and then a white and black glass layer is formed by sandblasting. It is formed by cutting.

The surface of the partition wall 15 on the display side of the vertical wall portion 15a is not in contact with the protective layer 12 (see FIG. 7), and a gap r is formed between them, but the side of the horizontal wall portion 15b on the display side is formed. The surface is in contact with the portion of the protective layer 12 which covers the raised dielectric layer 11A, and shields between the discharge cells C adjacent in the column direction.

The partition wall 1 facing the discharge space S in the discharge cell C
On the side surfaces of the vertical wall portion 15a and the horizontal wall portion 15b of No. 5 and the surface of the dielectric layer 14, a phosphor layer 16 is sequentially formed so as to cover all of these five surfaces.

The color of the phosphor layer 16 is set so that red (R), green (G) and blue (B) colors are arranged in order in the row direction for each discharge cell C. The discharge space S is filled with a rare gas.

In the above PDP, each row electrode pair (X, Y) constitutes one display line (row) L of the matrix display screen, and the partition wall 15 composed of the vertical wall portion 15a and the horizontal wall portion 15b causes discharge. The discharge cells C are defined by dividing the space S.

The image display on this PDP is the same as the conventional P
It is performed in the same manner as DP. That is, first, by the address operation, the discharge is selectively performed between the row electrode pair (X, Y) and the column electrode D in each discharge cell C, and all the display lines L are displayed.
The lit cells (the discharge cells C in which the wall charges are formed on the dielectric layer 11) and the unlit cells (the discharge cells C in which the wall charges are not formed on the dielectric layer 11) correspond to the image to be displayed. Distributed on the panel.

After this address operation, discharge sustaining pulses are alternately applied to the row electrodes X and Y of the row electrode pair (X, Y) all at once on all the display lines L, and the discharge sustaining pulses are applied. Surface discharge is generated in each lighted cell each time.

As described above, ultraviolet rays are generated by the surface discharge in the lighting cell, and red (R) in the discharge cell C,
A display image is formed by exciting each of the green (G) and blue (B) phosphor layers 16 to emit light.

In the above PDP, in each discharge cell C, the phosphor layer 16 covers the four side walls of the partition wall 15 facing the discharge space S in the discharge cell C and the display side of the dielectric layer 14 that covers the column electrodes D. The surface area of the phosphor layer 16, that is, the light emitting area, is enlarged as compared with the conventional PDP by being formed on the five surfaces.

As a result, the brightness of each discharge cell C is increased, and the brightness of the display screen can be improved when compared with the conventional one, while the discharge cells are increased in order to increase the definition of the screen. Even if the size of C is reduced, the brightness of the display screen does not decrease as compared with the conventional one.

Further, in the PDP, the protruding electrode portions Xa and Ya of the row electrodes X and Y extend from the electrode body portions Xb and Yb to the row electrode side of the other pair forming a pair, and each discharge cell C has an island. Since each of the discharge cells C is configured to be independent, even if the size of each discharge cell C is reduced in order to increase the definition of the screen, the discharge to the adjacent discharge cell C in the display line L direction (row direction) is performed. There is no risk of interference.

Furthermore, the PDP has a dielectric layer 11
A raised dielectric layer 11A is formed on the side wall, and the protective layer 12 covering the raised dielectric layer 11A is formed by the lateral wall portion 15 of the partition wall 15.
The discharge space S of the discharge cell C that is in contact with the display side surface of b and is adjacent in the column direction (direction orthogonal to the display line L).
Are mutually shielded (see FIGS. 2 and 3, 5), discharge interference between adjacent discharge cells C in the column direction is prevented.

On the other hand, the display side surface of the vertical wall portion 15a of the partition wall 15 faces the portion of the dielectric layer 11 where the raised dielectric layer 11A is not formed, and the display side surface of the vertical wall portion 15a. Since the gap r is formed between the surface and the protective layer 12 (see FIGS. 6 and 7), the discharge spaces S of the discharge cells C adjacent to each other in the row direction (display line L direction) are separated by the gap r. A slight priming effect is generated, and a priming effect that causes discharges in a chain is generated, and the discharge operation can be stabilized.

Further, the PDP has the electrode body Xb,
By providing the black conductive layers Xb1 and Yb1 respectively on the display surface side of Yb, it is possible to prevent reflection of external light incident through the front glass substrate 10 and improve the contrast of the display screen. Can be done.

Further, the above PDP has the rear glass substrate 1
Since the dielectric layer 14 formed on the display layer 3 is white, the light emitted by the phosphor layer 16 is reflected to the display side and prevented from escaping to the back side. The brightness can be increased.

The dielectric layer 14 also serves as a protective layer during sandblasting.

Further, since the black layer 151 is formed on the display side surface of the partition wall 15 in the PDP, the outside light incident through the front glass substrate 10 is prevented from being reflected at this portion. Thus, the contrast of the display screen can be improved.

Since the four wall surfaces of the partition wall 15 partitioning the discharge cell C are formed of the white layer 152, the light emitted from the phosphor layer 16 is reflected to the display side,
The brightness of the display screen can be increased.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIG. 9 (in each of the following embodiments, points different from the above embodiment will be mainly described. The same parts are designated by the same reference numerals or some explanations thereof are omitted). FIG. 9 is a front view schematically showing the relationship between the row electrode pairs and the partition walls of the PDP in the second embodiment.

The PDP of the second embodiment is shown in FIGS.
While the row electrodes X and Y of the PDP in the first example are alternately arranged in the column direction, the row electrodes X and Y are arranged in the display lines Li, Li + 1 ... Arranged in the column direction. (Y
i, Xi), (Xi + 1, Yi + 1), etc., the arrangement is alternated for each display line.

With the above arrangement, the rows of the row electrode pairs (Yi, Xi) and (Xi + 1, Yi + 1) arranged back to back on the display lines Li, Li + 1 adjacent in the column direction. Electrodes Xi and Xi + 1 of each protruding electrode portion X
ai and Xai + 1 are connected to a common electrode body Xbj.

Thus, the PDP in the second embodiment
In the adjacent display line, the row electrodes Xi and Xi + 1 arranged back to back share the electrode body Xbj, and the installation area of the electrode body Xbj is shown in FIG.
8 to 8 are smaller than the installation area of the electrode main body of the PDP.

Therefore, the width of the lateral wall portion 25b of the partition wall 25 facing the electrode main body portion Xbj can be made smaller than that of the PDP of FIGS. 4 to 8, and the volume of the discharge cell C1 is correspondingly increased to increase the discharge cell C1. Since the surface area of the phosphor layer formed therein can be increased, the brightness of the display screen is increased.

Furthermore, the discharge current can be reduced by sharing the electrode body Xbj.

In this example, the base end portions of the protruding electrode portions of the row electrodes Xi and Xi + 1 which are arranged back to back on the adjacent display lines are connected to each other to be integrally formed. Is also good.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 10 shows this third
It is a front view which shows typically the relationship between the row electrode pair and partition of PDP in an Example.

Similar to the PDP of the second embodiment of FIG. 9, the PDP of the third embodiment has row electrodes X and Y in the display lines Li-11, Li1, Li + 11 ... Arranged in the column direction. But,
(Yi-11, Xi-11), (Xi1, Yi1), (Yi + 11, Xi +
11)… And so on, the display lines are alternately arranged and arranged.

With the above arrangement, in the display lines adjacent to each other in the column direction, the protruding electrode portions Xai-11 and Xai1 of the row electrodes Xi-11 and Xi1 arranged back to back with each other have a common electrode body. It is connected to the section Xbj1.

Further, in the display lines adjacent in the column direction, the row electrodes Yi1 arranged back to back with each other.
And Yi + 11, the protruding electrode portions Yai1 and Yai + 11 are connected to a common electrode body portion Ybj1.

As described above, the PDP in the third embodiment
In the adjacent display line, the row electrodes Xi1 and Xi + 11 arranged back to back share the electrode body Xbj1, and the row electrodes Yi1 and Yi + 11 arranged back to back are also electrode body. Since the portion Ybj1 is shared, the installation area of the electrode main body portions Xbj1 and Ybj1 becomes smaller than the installation area of the electrode main body portion of the PDP of FIGS.

Therefore, the electrode body portions Xbj1 and Ybj1
The width of the lateral wall portion 25b1 of the partition wall 251 facing each other can be made smaller than that of the PDP of FIGS. 4 to 8, and the volume of the discharge cell C11 can be increased accordingly, and the phosphor formed in the discharge cell C11 can be increased. Since the surface area of the layers can be increased further, the brightness of the display screen is increased.

Further, the electrode body portions Xbj1 and Ybj1
It is possible to reduce the discharge current by sharing the above.

In this example, as shown in FIG. 11, in the adjacent display lines, the protruding electrode portions Xai-1 of the row electrodes Xi-11 and Xi1 arranged back to back with each other.
The base end portions of 1 and Xai1 are connected and integrally formed, and the base end portions of the protruding electrode portions Yai1 and Yai + 11 of the row electrodes Yi1 and Yi + 11 are connected and integrally formed. It may be formed.

[Fourth Embodiment] Next, a fourth embodiment of the present invention will be described with reference to FIGS. 12 is a front view schematically showing the relationship between the row electrode pairs and the barrier ribs of the PDP of the fourth embodiment, FIG. 13 is a sectional view taken along line V3-V3 of FIG. 9, and FIG. 14 is V4 of FIG. 15 is a sectional view taken along line W3-W3 of FIG. 12, and FIG. 16 is a sectional view taken along line W4-W4 of FIG.

The PDP shown in FIGS. 12 to 16
The row electrode pairs (X, Y) are arranged on the back surface of the front glass substrate 10 in the same manner as the PDP of the first embodiment of FIGS.

Then, on the back surface of the front glass substrate 10,
A black light absorption layer extending in the row direction along the electrode body portions Xb and Yb between the electrode body portions Xb and Yb of the row electrode pairs (X, Y) that are adjacent to each other in the column direction and are back to back. A (light-shielding layer) 30 is formed, and a light-absorbing layer (light-shielding layer) 31 is further formed on a portion of the barrier ribs 35 in a grid pattern that faces the vertical wall portion 35a. Partition 3
5 is different from the case of the first embodiment in that it is formed of a white single layer structure.

The structure of the other parts is the same as that of the first embodiment, and the same reference numerals as those in FIGS. 4 to 8 are attached.

In the PDP, the light absorbing layers (light-shielding layers) 30 and 31 and the electrode main body portions Xb and Yb formed in a two-layer structure are provided on the rear surface of the front glass substrate 10 except for the portions facing the discharge cells C. By being covered with the black conductive layers Xb1 and Yb1, it is possible to prevent reflection of external light entering through the front glass substrate 10 and improve the contrast of the display screen.

In this example, only one of the light absorption layers (light shielding layers) 30 and 31 may be formed. In addition, a color filter layer (not shown) of a color corresponding to the color (R, G, B) of the phosphor layer 16 in the discharge cells C facing each other is provided on the back surface of the front glass substrate 10 for each discharge cell C. It can also be formed.

In this case, the light absorption layers (light shielding layers) 30, 31
Are formed at the gaps of the color filter layer formed in an island shape so as to face each discharge space S, or at positions corresponding to the gaps.

[Fifth Embodiment] Next, a fifth embodiment of the present invention will be described with reference to FIGS. FIG. 17 is a front view schematically showing the relationship between the row electrode pairs and the partition walls of the PDP of the fifth embodiment, and FIG. 18 is V5-V5 of FIG.
FIG. 19 is a sectional view taken along line V6-V6 in FIG.

The PDP shown in FIGS. 17 to 19
Is a row electrode pair (Xf, Y
f) is arranged in the same manner as the PDP of the first example of FIGS. 4 to 8.

Then, on the back surface of the front glass substrate 10,
A black light absorbing layer (light-shielding layer) 40 is formed on the entire portion of the checkerboard-like partition wall 45 facing the display-side surface.

The electrode main body portions Xfb and Yfb of the row electrodes Xf and Yf are formed in a single-layer structure having only a main conductive layer, and are arranged so as to be located on the back surface of the light absorption layer (light shielding layer) 40. There is.

In the PDP, the portion other than the portion facing the discharge cells C on the back surface of the front glass substrate 10 is covered with the light absorbing layer (light-shielding layer) 40.
It is possible to prevent reflection of external light incident through the front glass substrate 10 and improve the contrast of the display screen.

In order to prevent the reflection of external light, it is not necessary to form a black conductive layer on the electrode main body to form a two-layer structure as in the above-mentioned examples.

[Sixth Embodiment] Next, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 20 is a plan view schematically showing the relationship between the row electrode pairs and the partition walls of the PDP of the sixth embodiment.

In the PDP shown in FIG. 20, the vertical walls 55a of the barrier ribs 55 in the shape of a double girder have a width h in the direction of the display line L.
1 is formed so as to be wider than the partition wall in each of the above examples, and further, the width h2 of both end portions of the vertical wall 55a is set to the horizontal wall 55.
It is formed so that it is further enlarged as it approaches b.

The protruding electrode portions Xf1a and Yf1a of the row electrodes Xf1 and Yf1 are formed such that the wide portions Xo1a1 and Yo1a1 facing each other through the gap g2 are oblique to the display line L direction. ing.

The PDP is composed of the vertical walls 5 of the barrier ribs 55 in the shape of a cross.
By increasing the width of 5a, a black layer is formed on the partition wall as in the first embodiment, or a light shielding layer is formed on the surface of the front glass substrate facing the partition wall as in the fourth and fifth embodiments. When formed to prevent reflection of external light, the area for forming the black layer or the light shielding layer can be increased,
It is possible to more effectively prevent reflection of external light.

Further, the gap between the protruding electrode portions in the row electrode pair has a facing length (discharge gap length) x in the display line direction, which is usually required to be 200 to 250 μm in order to lower the discharge start voltage. Since the discharge start voltage becomes higher when the voltage is higher or lower than that, the partition wall 55
The above discharge gap length cannot be secured if the width of the vertical wall 55a is widened. However, according to the PDP, the wide electrode portions Xo1a1 and Yo1 of the protruding electrode portions Xo1a and Yo1a are provided.
Since the a1 is formed so as to be oblique to the display line L direction and the gap g2 is configured to extend in the direction oblique to the display line L direction, the discharge gap length x is within the above range. Is set as follows.

[Brief description of drawings]

FIG. 1 is a front view schematically showing a conventional cell structure of a surface discharge type AC plasma display panel.

FIG. 2 is a sectional view taken along line VV of FIG.

3 is a cross-sectional view taken along the line WW of FIG.

FIG. 4 is a front view schematically showing the relationship between the row electrode pairs and the partition walls of the PDP in the first embodiment of the present invention.

5 is a cross-sectional view taken along line V1-V1 of FIG.

6 is a cross-sectional view taken along line V2-V2 of FIG.

7 is a cross-sectional view taken along line W1-W1 of FIG.

8 is a cross-sectional view taken along line W2-W2 of FIG.

FIG. 9 is a front view schematically showing the relationship between row electrode pairs and partition walls of a PDP according to the second embodiment of the present invention.

FIG. 10 is a front view schematically showing the relationship between row electrode pairs and partition walls of the PDP according to the third embodiment of the present invention.

FIG. 11 is a schematic diagram showing a modification of the third embodiment of the present invention.

FIG. 12 is a front view schematically showing the relationship between row electrode pairs and partition walls of a PDP according to a fourth embodiment of the present invention.

13 is a cross-sectional view taken along line V3-V3 of FIG.

14 is a cross-sectional view taken along line V4-V4 of FIG.

15 is a cross-sectional view taken along line W3-W3 of FIG.

16 is a cross-sectional view taken along line W4-W4 of FIG.

FIG. 17 is a front view schematically showing the relationship between row electrode pairs of PDPs and partition walls in the fifth embodiment of the present invention.

18 is a cross-sectional view taken along line V5-V5 of FIG.

19 is a cross-sectional view taken along line V6-V6 of FIG.

FIG. 20 is a front view schematically showing the relationship between row electrode pairs and partition walls of the PDP in the sixth embodiment of the present invention.

[Explanation of symbols]

10 ... Front glass substrate (front substrate) 11 ... Dielectric layer 11A ... Dielectric layer raised 12… Protective layer 13 ... Rear glass substrate (rear substrate) 14 ... Dielectric layer 15, 25, 251, 35, 45 ... Partition wall 15a, 25a, 35a ... Vertical wall portion 15b, 25b, 25b1, 35b ... Horizontal wall portion 151 ... Black layer 152… White layer 16 ... Phosphor layer 30 ... Light absorbing layer 31 ... Light absorbing layer 40 ... Light absorbing layer X ... Row electrode (first row electrode) Y ... Row electrode (second row electrode) Xa, Xf1a ... protruding electrode part Ya, Yf1a ... protruding electrode part Xb ... Electrode body Yb ... Electrode body Xb1, Yb1 ... Black layer Xb2, Yb2 ... Monochrome color layer S ... Discharge space C ... Discharge cell (unit light emitting area) g ... Gap r ... gap L: Display line

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tatsuro Sakai             2680 Nishi Hanawa, Tatomi Town, Nakakoma District, Yamanashi Prefecture             Ionia Display Center (72) Inventor Kosuke Masuda             2680 Nishi Hanawa, Tatomi Town, Nakakoma District, Yamanashi Prefecture             Ionia Display Center F-term (reference) 5C040 FA01 FA04 GB03 GB14 GC02                       GF03 GG01 GH06 MA03

Claims (3)

[Claims] 1. A plurality of row electrode pairs, which extend in the row direction and are arranged in parallel in the column direction to form display lines, respectively, on a side of the front substrate which faces the back substrate via a discharge space, and the row electrode pairs. In the plasma display panel provided with the dielectric layer, a discharge space is provided for each unit light emitting region by the vertical wall portion extending between the front substrate and the rear substrate and extending in the column direction and the horizontal wall portion extending in the row direction. A partition wall formed in a row direction and a column direction, and a phosphor layer is formed on a lateral wall portion and a vertical wall portion of the partition wall facing the unit light emitting region of the discharge space, and a surface on the back substrate, and the row electrode pair Each of the row electrodes constituting the electrode main body formed of a metal layer extending in the row direction, and for each unit light emitting region in the discharge space, overhangs in the direction of another row electrode forming a pair from the electrode main body. Required discharge gap A plasma display panel comprising: protruding electrode portions formed of transparent conductive films that face each other with a gap between them. 2. The plasma display panel according to claim 1, wherein the protruding electrode portion includes a wide portion facing each other through a discharge gap and a narrow base end portion connected to the electrode body portion. 3. A light absorbing layer is formed between a pair of electrode body portions of the row electrodes which are arranged back to back on the back side of the front substrate between two display lines. Plasma display panel according to.