JP2002197981A - Plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display panel capable of obtaining a high definition image by preventing degradation in brightness and discharge error in discharge cells. SOLUTION: The plasma display panel comprises barrier ribs 25 arranged between a front glass substrate and a back glass substrate for partitioning discharge cells C1 with vertical rib portions 25a and lateral rib portions 25b, 25b1 formed in parallel crossed shape and row electrodes Xi, Yi having respective transparent electrodes Xai, Yai provided in each of the discharge cells C1, extending from bus electrodes Xbj, Ybj toward the paired row electrodes. The row electrodes Xi and the row electrodes Yi are arranged so that their positions in column direction are alternately changed in adjacent display lines Li. The transparent electrodes Xai facing in opposite directions between the adjacent display lines in column direction of the row electrodes Xi share the same bus electrodes Xbj with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface discharge type AC type plasma display panel, and more particularly to a cell structure of the 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. 4 is a front view schematically showing a conventional cell structure of this surface discharge type AC plasma display panel. FIG. 5 is a sectional view taken along line VV of FIG. 4, and FIG. FIG. 5 is a sectional view taken along line WW of FIG. 4.

In FIG. 4 to FIG. 6, a plurality of row electrode pairs (X ', Y') and a plurality of row electrode pairs (X '',Y'), and a protective layer 3 made of MgO for covering the back surface of the dielectric layer 2
Are provided in order.

The row electrodes X 'and Y' are transparent electrodes Xa 'and Y made of a transparent conductive film such as ITO, respectively.
a 'and bus electrodes Xb' and Yb 'made of a narrow metal film to compensate for the conductivity.

The row electrodes X 'and Y' are alternately arranged in the column direction so as to face each other across the discharge gap g ', and a matrix display is performed by each row electrode pair (X', Y '). One display line (row) L is configured.

On the other hand, the rear glass substrate 4 facing the front glass substrate 1 via the discharge space S 'filled with the rare gas is arranged so as to extend in a direction perpendicular to the pair of row electrodes X' and Y '. A plurality of column electrodes D ′, and strip-shaped partition walls 5 formed so as to extend in parallel between the column electrodes D ′,
R and R, which cover the side surfaces of the partition walls 5 and the column electrodes D ', respectively.
G and B color-coded phosphor layers 6 are provided.

In each display line L, the column electrode D 'and the row electrode pair (X', Y ') cross each other, and the discharge space S' is defined by the partition walls 5, so that the discharge which is a unit light emitting region is formed. Cells C 'are defined respectively.

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

That is, first, by an address operation, a discharge is selectively performed between the row electrode pair (X ′, Y ′) and the column electrode D ′ in each discharge cell C ′, and the lighting cell (dielectric layer) is discharged. 2 and discharge cells C ′ in which no wall charges are formed in the dielectric layer 2 are distributed on the panel in accordance with an image to be displayed. .

After this address operation, a sustaining pulse is applied alternately to the row electrodes X 'and Y' of all the row electrode pairs simultaneously in all the display lines L. Each time the sustaining pulse is applied, Then, surface discharge is generated in the lighting cell.

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

[0013]

In such a surface discharge type AC plasma display panel as described above, FIG.
As shown in (2), 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 C ′, thereby increasing the luminance of the display screen.

However, in the above-described structure of the conventional surface discharge type AC plasma display panel, when the size of each discharge cell C ′ is reduced to increase the definition of the screen, the phosphor layer 6 The surface area of the light-emitting device is reduced, and the brightness is reduced.

Further, in order to cope with the higher definition of the screen, if the pitch between each pair of row electrodes (X ', Y') is reduced, interference of discharge with discharge cells C 'adjacent in the column direction will occur. This causes a problem that erroneous discharge easily occurs, and also a problem that erroneous discharge easily occurs between adjacent discharge cells C ′ in the row direction.

The present invention has been made to solve the above-mentioned problems in the conventional surface-discharge AC plasma display panel.

That is, it is an object of the present invention to provide a plasma display panel capable of preventing a decrease in luminance and erroneous discharge in a discharge cell and achieving a high-definition screen.

[0018]

According to a first aspect of the present invention, there is provided a plasma display panel for achieving the above object.
On the back side of the front substrate, there are provided a plurality of row electrode pairs extending in the row direction and juxtaposed in the column direction to form display lines, respectively, and a dielectric layer covering the row electrode pairs. And a plurality of column electrodes extending in the column direction and arranged in the row direction and intersecting the pair of row electrodes, each of which forms a unit light emitting region in the discharge space on the side facing the discharge space. In the panel, a discharge space is defined for each unit light emitting region in a row direction and a column direction by a vertical wall portion extending in a column direction and a horizontal wall portion extending in a row direction, which is arranged between the front substrate and the rear substrate and formed in a grid pattern. A first row electrode and a second row electrode constituting the row electrode pair project from the electrode main body extending in the row direction to the other row electrode to be paired for each unit light emitting region. Required discharge gear Protruding electrode portions that face each other via a pair of electrodes, and are arranged such that the positions in the column direction of the first row electrodes and the second row electrodes that constitute the row electrode pairs are alternately switched in adjacent display lines. The protruding electrode portions that are back-to-back between two display lines adjacent in the column direction of at least one of the first row electrode and the second row electrode share the same electrode body. It is characterized by having.

In the plasma display panel according to the first aspect of the present invention, the discharge space between the front substrate and the rear substrate is formed by the partition walls having the vertical wall portions extending in the column direction and the horizontal wall portions extending in the row direction. , In the row direction and the column direction.

In this plasma display panel, the first row electrode and the second row electrode constituting the row electrode pair are arranged such that the first row electrode and the second row electrode extend from the electrode body extending in the row direction to another row electrode paired for each unit light emitting region. Protruding electrode portions projecting from each other with a required discharge gap therebetween, each of which is configured so as to be island-independent for each unit light-emitting region partitioned around by a partition wall, and adjacent display portions. The first row electrodes or the second row electrodes arranged back to back in the line are configured to share the same electrode body.

Therefore, according to the first aspect, the discharge space between the front substrate and the rear substrate is divided in the row direction and the column direction for each unit light-emitting region by the grid-shaped partition walls, whereby the column is formed. It is possible to prevent the occurrence of erroneous discharge due to interference of discharge between adjacent unit light emitting regions in the direction and the row direction, and furthermore, each row electrode forming a row electrode pair is provided with an island for each unit light emitting region. Since the discharge for light emission between the row electrodes is performed independently for each unit light emitting region by being configured so as to be independent in each shape, each unit light emitting region is increased in order to increase the definition of an image. Even when the size of the pixel is reduced, it is possible to prevent the occurrence of discharge interference with the adjacent unit light emitting areas in the row direction, and to reduce the size of adjacent display lines. Since the first row electrodes or the second row electrodes arranged back to back share the same electrode main body, the installation area of the electrode main body can be reduced, and the unit light emission is correspondingly reduced. Since the light emitting area of the unit light emitting area can be increased by increasing the size of the area, the luminance of the display image can be increased.

Further, by sharing the electrode body,
The discharge current of the row electrode pair can be reduced.

According to a second aspect of the present invention, in order to achieve the above object, in addition to the configuration of the first aspect, the protruding electrode portion is formed of a transparent conductive layer and the electrode main portion is formed of a metal. The electrode main body is disposed at a position overlapping the horizontal wall of the partition when viewed from the front substrate side.

According to the second plasma display panel, since the protruding electrode portions forming the row electrodes are formed by the transparent conductive layer, the protruding electrode portions are
Even if it is arranged at a position overlapping with the unit light emitting region when viewed from the front substrate side, it does not block light emission in this unit light emitting region, and furthermore, since the electrode main body is formed of a metal layer, it is transparent. While it is possible to supplement the conductivity of the protruding electrode portion formed by the conductive layer,
Since the electrode main body is disposed at a position overlapping the horizontal wall of the partition wall when viewed from the front substrate side, the light emitting area of the unit light emitting region is not narrowed by the electrode main body composed of the metal layer.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front view schematically showing a first example of an embodiment of a plasma display panel according to the present invention.

The plasma display panel (hereinafter, referred to as PDP) shown in FIG. 1 is of an AC drive type called a reflection type in which a phosphor layer is disposed on a back side substrate, similarly to the conventional PDP of FIGS. It is a surface discharge type PDP.

In FIG. 1, a plurality of row electrode pairs (Xi, Yi) are provided on the rear surface of a front glass substrate (not shown) as a display surface.
Are arranged in parallel so as to extend in the row direction (the left-right direction in FIG. 1) of the front glass substrate.

The row electrode Xi is formed of a T-shaped IT
A transparent electrode Xai made of a transparent conductive film such as O and a bus electrode Xbj made of a metal film extending in the row direction of the front glass substrate and connected to the narrow base end of the transparent electrode Xai.

Similarly, the row electrode Yi is formed in a T-shaped transparent electrode Yai made of a transparent conductive film such as ITO and a narrow base end of the transparent electrode Yai extending in the row direction of the front glass substrate 10. Bus electrode Ybj made of connected metal film
And is constituted by.

The row electrodes Xi and Yi are connected to display lines L arranged in the column direction (vertical direction in FIG. 1) of the front glass substrate.
i, Li + 1..., the row electrodes Xi and Yi are (Yi, X
i), (Xi + 1, Yi + 1)... are arranged alternately for each display line.

The bus electrodes Xbj and Y of the row electrodes Xi and Yi
The respective transparent electrodes Xai and Ya arranged in parallel along bj
i extend to the row electrode side of the pair, and the top sides of the wide portions of the transparent electrodes Xai and Yai are opposed to each other via a discharge gap g of a required width.

With the above arrangement, in the display lines Li and Li + 1 adjacent in the column direction, the rows of the row electrode pairs (Yi, Xi) and (Xi + 1, Yi + 1) which are arranged back to back. The transparent electrodes Xai of the electrodes Xi and Xi + 1, respectively
And Xai + 1 are connected to a common bus electrode Xbj.

A partition wall 25 for partitioning a discharge space between the front glass substrate and the rear glass substrate (not shown) has a vertical wall extending in the column direction at a position between the transparent electrodes Xai and Yai arranged in the row direction. 25a and the bus electrode Xbj
And a horizontal wall 25b extending in the row direction at a position opposing the horizontal direction, and a horizontal wall 25b1 extending in the row direction at a position opposing the bus electrodes Ybj-1 and Ybj positioned back to back between display lines adjacent in the column direction. Is formed.

And, by this cross-shaped partition 25,
The discharge space between the front glass substrate and the back glass substrate is a transparent electrode Xa paired in each row electrode pair (Xi, Yi).
A rectangular discharge cell C1 is formed for each of the portions facing i and Yai.

In the PDP of the first example, row electrodes Xi and Xi + 1 arranged back to back on adjacent display lines share a bus electrode Xbj,
The installation area of the bus electrode Xbj is smaller than the installation area of the bus electrodes Ybj-1 and Ybj which are separated from each other and arranged back to back.

Therefore, the partition 2 facing the bus electrode Xbj
5 can be made smaller than the width of the horizontal wall 25b1 opposed to the bus electrodes Ybj-1 and Ybj disposed back to back with each other, and the volume of the discharge cell C1 is increased accordingly. Since the surface area of the phosphor layer formed in C1 can be increased, the brightness of the displayed image is increased.

Further, by sharing the bus electrode Xbj,
The discharge current to the row electrode Xi can be reduced.

In this example, the base ends of the transparent electrodes of the row electrodes Xi and Xi + 1 arranged adjacent to each other on the adjacent display lines may be connected to be formed integrally. good.

Next, a second example of the embodiment of the present invention will be described with reference to FIG.

FIG. 2 is a front view schematically showing the relationship between the row electrode pairs of the PDP and the barrier ribs in the second example.

The PDP of the second example is similar to the PDP of the first example of FIG. 1 in that the display lines Li- are arranged in the column direction.
At 1 ', Li', Li + 1 '..., The row electrodes Xi' and Yi '
Are (Yi-1 ', Xi-1'), (Xi ', Yi'), (Yi +
1 ', Xi + 1')... Are alternately arranged for each display line.

With the above arrangement, the transparent electrodes Xai-1 'and Xai' of the row electrodes Xi-1 'and Xi' which are arranged back to back on the display lines adjacent in the column direction are common. Is connected to the bus electrode Xbj ′.

Further, in the display lines adjacent in the column direction, the row electrodes Y arranged back to back with each other
i 'and Yi + 1', the transparent electrodes Yai 'and Yai +, respectively.
1 ′ are connected to a common bus electrode Ybj ′.

Thus, the PDP in the second example is
In adjacent display lines, row electrodes Xi 'and Xi + 1' arranged back to back share a bus electrode Xbj ', and row electrodes Yi''and Yi + 1' arranged back to back to each other. Share the bus electrode Ybj ', the installation area of the bus electrodes Xbj' and Ybj 'becomes smaller than the installation area of the bus electrode of the PDP in FIG.

Therefore, the width of the side wall 25b 'of the partition wall 25' facing the bus electrode Ybj 'can be made smaller than that of the PDP shown in FIG. 1, and the volume of the discharge cell C1' is increased by that amount. Since the surface area of the phosphor layer formed in C1 'can be further increased, the brightness of the displayed image is increased.

Further, bus electrodes Xbj 'and Ybj'
, The discharge current to the row electrodes Xi and Yi can be reduced.

In this example, as shown in FIG. 3, in the adjacent display lines, the transparent electrodes Xai-1 'of the row electrodes Xi-1' and Xi 'which are arranged back to back with each other.
And Xai 'are connected to each other to form a single unit, and further, the row electrodes Yi' and Yi + 1 'are connected to each other to form the transparent electrodes Yai' and Yai + 1 '. It may be formed integrally.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing a relationship between a row electrode pair of a PDP and a partition in a first example of the present invention.

FIG. 2 is a front view schematically showing a relationship between a row electrode pair of a PDP and a partition in a second example of the present invention.

FIG. 3 is a schematic diagram showing a modified example of the second example of the present invention.

FIG. 4 is a front view schematically showing a conventional cell structure of a surface discharge type AC plasma display panel.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view taken along line WW of FIG. 4;

[Explanation of symbols]

25, 25 '... partition wall 25a, ... vertical wall (vertical wall portion) 25b, 25b1, 25b' ... horizontal wall (horizontal wall portion) Xi, Xi '... row electrode Yi, Yi' ... row electrode Xai, Xai '... transparent electrode ( Protruding electrode portion Yai, Yai '... Transparent electrode (protruding electrode portion) Xbj, Xbj' ... Bus electrode (electrode main portion) Ybj, Ybj '... Bus electrode (electrode main portion) C1, C1' ... Discharge cell (unit light emission) Area) g ... gap Li, Li '... display line

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tatsuro Sakai 2680 Nishihanawa, Tatomi-cho, Nakakoma-gun, Yamanashi Prefecture Inside the Kofu Office of Oka Pioneer Co., Ltd. Oka Pioneer Corporation Kofu Office F-term (reference) 5C040 FA01 FA04 GB03 GB14 GC02 GC12 GF03 GG05 MA03 MA17

Claims (2)

[Claims] 1. A plurality of row electrode pairs extending in the row direction and arranged in the column direction to form display lines, respectively, and a dielectric layer covering the row electrode pairs are provided on the back side of the front substrate, On the side of the rear substrate facing the front substrate with the discharge space interposed therebetween, a plurality of column electrodes extending in the column direction and arranged in the row direction and intersecting the row electrode pairs, each constituting a unit light emitting region in the discharge space, are provided. In the provided plasma display panel, a discharge space is formed for each unit light-emitting region by a vertical wall portion extending in the column direction and a horizontal wall portion extending in the row direction, which is arranged between the front substrate and the rear substrate and formed in a grid pattern. A partition which is partitioned in a row direction and a column direction, wherein the first row electrode and the second row electrode constituting the row electrode pair are, for each unit light-emitting region, a pair formed from an electrode body extending in the row direction; Overhang in the direction of the electrode A protruding electrode portion opposed to each other via a necessary discharge gap, and positions of the first row electrode and the second row electrode constituting the row electrode pair in the column direction are alternately switched in adjacent display lines. The first row electrode and the second
A plasma display panel, wherein protruding electrode portions that are back-to-back between two display lines adjacent in the column direction of at least one of the row electrodes share the same electrode body. . 2. The semiconductor device according to claim 1, wherein the protruding electrode portion is formed of a transparent conductive layer, the electrode body portion is formed of a metal layer, and the electrode body portion is disposed at a position overlapping with a horizontal wall portion of the partition when viewed from the front substrate side. The plasma display panel according to claim 1.