JP2002150949A - Plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable securing of a priming effect in a plasma display panel in which the space between the unit luminous regions adjoining in the direction of row is closed. SOLUTION: There are provided a plasma display panel comprises partition walls 25, that are arranged between the front glass substrate 20 and the rear glass substrate 23 and divide a discharge space S in the columnar direction and row direction for each discharge cell C by a vertical wall 25a, extending in the row direction and a horizontal wall 25b extending in the column direction, and the horizontal walls between the discharge cells C standing along the mutually adjoining columns are separated by a gap SL, that is in parallel with the columnar direction. A discharge part, that generates a priming discharge p in the space of the gap SL, is formed in the mutually opposing part of the column electrodes Y1 which are positioned back to back of a pair of adjoining column electrodes (X1, Y1), and the inside of the gap SL and the inside of the discharge cell C adjoining in the row direction are mutually connected by a groove 21Aa, formed in the raised dielectric layer 21A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel structure of a surface discharge type AC type plasma display panel.

[0002]

In recent years, a surface discharge type AC plasma display panel has attracted attention as a large and thin color screen display device, and its spread has been promoted.

FIG. 11 is a plan view schematically showing a conventional cell structure of this surface discharge type AC plasma display panel. FIG. 12 is a cross-sectional view taken along line VV of FIG. 11, and FIG. FIG. 4 is a sectional view taken along line WW of FIG.

In FIG. 11 to FIG. 13, a plurality of pairs of row electrodes (X ′, Y ′) are provided on the back side of a front glass substrate 1 serving as a display surface of a plasma display panel (hereinafter, PDP). A dielectric layer 2 covering the pair of row electrodes (X ′, Y ′) and an M layer covering the back surface of the dielectric layer 2
The protective layer 3 made of gO is provided in order.

Each of the row electrodes X 'and Y' is composed of a transparent electrode Xa 'and Ya' made of a transparent conductive film such as a wide ITO (Indium Tin Oxide) and a narrow metal film which supplements the conductivity. Bus electrodes Xb ′ and Yb ′.

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, a discharge space S 'in which a discharge gas is sealed
Rear glass substrate 4 facing front glass substrate 1 through
Includes a plurality of column electrodes D 'arranged to extend in a direction orthogonal to the row electrode pairs X' and Y ', and a strip-shaped partition wall 5 formed between the column electrodes D' so as to extend in parallel with each other.
And a phosphor layer 6 that is color-coded into three primary colors of red (R), green (G), and blue (B), respectively, and covers the side surfaces of the partition walls 5 and the column electrodes D ′.

In each of the display lines L, the discharge space S 'is defined by the partition wall 5 at each intersection of the column electrode D' and the row electrode pair (X ', Y'), so that the unit light emitting region is formed. Are defined respectively.

The display of an image in the above-described surface discharge type AC PDP is performed as follows. That is, first, by an address operation, a discharge (opposite discharge) is selectively performed between the row electrode pair (X ′, Y ′) and the column electrode D ′ in each discharge cell C ′. The lighting cells (discharge cells having wall charges formed on the dielectric layer 2) and the light-off cells (discharge cells having no wall charges formed on the dielectric layer 2) correspond to images to be displayed on the panel. Distributed.

After the address operation, a sustaining pulse is applied alternately to the row electrode pairs (X ', Y') simultaneously in all the display lines L. Each time the sustaining pulse is applied, Surface discharge is generated in the lighting cell.

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

Here, in the structure of the conventional PDP as described above, if the size of each discharge cell C 'is reduced in order to increase the definition of the screen, the surface area of the phosphor layer 6 decreases accordingly. This causes a problem that the brightness of the screen is reduced.

Further, in order to cope with the higher definition of the screen, the pitch of the row electrode pairs (X ', Y') is reduced, so that the discharge cells C adjacent in the column direction (vertical direction in FIG. 11) are formed. In this case, there is a problem that erroneous discharge is likely to occur due to discharge interference during the period.

Therefore, the applicant of the present invention first described FIG.
Novel surface discharge type AC type PD as shown in 4-18
P is making a proposal.

In this PDP, a plurality of pairs of row electrodes (X, Y) are provided on the rear surface of a front glass substrate 10 as a display surface in the row direction of the front glass substrate 10 (the horizontal direction in FIG. 11). ) So as to extend in parallel.

The row electrode X is formed of a T-shaped ITO
And the like, and a bus electrode Xb made of a metal film extending in the row direction of the front glass substrate 10 and connected to the narrow base end of the transparent electrode Xa.

Similarly, a row electrode Y is formed at the narrow base end of the transparent electrode Ya extending in the row direction of the front glass substrate 10 with a transparent electrode Ya formed of a transparent conductive film such as ITO formed in a T shape. It is constituted by a bus electrode Yb made of a connected metal film.

The row electrodes X and Y are connected to the front glass substrate 10
14, the transparent electrodes Xa and Ya arranged in parallel along the bus electrodes Xb and Yb extend to the row electrode side of the mating pair. , The top sides of the wide portions of the transparent electrodes Xa and Ya are opposed to each other via a discharge gap g of a required width.

The bus electrodes Xb and Yb are respectively composed of a black conductive layer Xb 'and Yb' 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 b ″ and Yb ″.

On the back of the front glass substrate 10,
A 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, an adjacent bus electrode Xb of the adjacent row electrode pair (X, Y) is formed. The dielectric layer 11 is located at a position opposing the region between the bus electrode Xb and the bus electrode Yb, and at a position opposing the region between the bus electrode Xb and the bus electrode Yb.
11A is formed so as to extend in parallel with the bus electrodes Xb and Yb.

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

On the other hand, a column electrode D is provided on the display-side surface of the rear glass substrate 13 arranged in parallel with the front glass substrate 10.
Are located at positions opposed to the paired transparent electrodes Xa and Ya of each row electrode pair (X, Y).
They are arranged in parallel at a predetermined interval from each other so as to extend in a direction (column direction) orthogonal to Y).

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

The partition walls 15 are formed by vertical walls 15 extending in the column direction at positions between the column electrodes D arranged in parallel with each other.
and a horizontal wall 15b extending in the row direction at a position facing the raised dielectric layer 11A.

And, by this cross-shaped partition wall 15,
A discharge space S between the front glass substrate 10 and the rear glass substrate 13 is partitioned into portions facing the paired transparent electrodes Xa and Ya in each row electrode pair (X, Y), and each of the rectangular discharge cells is formed. C is formed.

The partition 15 has a two-layer structure of a black layer (light absorbing layer) 15 ′ formed on the display surface side and a white layer (light reflecting layer) 15 ″ on the back side. The side wall surface facing S is configured to be substantially white (that is, the light reflecting layer).

The display side surface of the vertical wall 15a of the partition wall 15 is not in contact with the protective layer 12 (see FIGS. 16 and 17).
A gap r is formed therebetween, but the display-side surface of the horizontal wall 15b is in contact with the portion of the protective layer 12 covering the raised dielectric layer 11A (see FIGS. 15 and 18). The space between discharge cells C adjacent to each other in the direction is closed.

The vertical wall 15a of the partition wall 15 facing the discharge space S
A phosphor layer 16 is formed on the side surface of the horizontal wall 15b and the surface of the dielectric layer 14 so as to cover all of these five surfaces, respectively. The red (R), green (G), and blue (B) colors are set so as to be sequentially arranged in the row direction for each S. And the discharge space S
Inside, a discharge gas is sealed.

In this PDP, each of the row electrode pairs (X, Y) forms one display line (row) L of a matrix display screen.

The image display on this PDP is shown in FIGS.
Similarly to the PDP 13, first, an image formed by illuminated cells and unilluminated cells on all display lines L by selective discharge between a row electrode pair (X, Y) and a column electrode D by an address operation. After that, a discharge sustaining pulse is applied alternately to all the row electrode pairs (X, Y) at the same time in all the display lines L, so that the surface discharge in each lighting cell. Is generated.

Ultraviolet rays are generated by the surface discharge in the lighting cells, and the respective phosphor layers 16 of R, G, and B in the discharge cells C are excited to emit light, thereby forming a display screen. Is done.

The PDP is composed of the transparent electrodes X of the row electrodes X and Y.
Since a and Ya extend from the bus electrodes Xb and Yb to the row electrode side of the mating partner and are configured to be independent in an island shape for each discharge cell C, the screen definition is increased. For this reason, even if the size of each discharge cell C is reduced, there is a feature that there is no possibility that discharge interference occurs between discharge cells C adjacent in the row direction.

Further, a raised dielectric layer 11A is formed on the dielectric layer 11, and a protective layer 12 covering the raised dielectric layer 11A is brought into contact with the display-side surface of the lateral wall 15b of the partition wall 15 so as to be aligned in the column direction. , The adjacent discharge cells C are closed to each other, thereby preventing discharge interference between adjacent discharge cells C in the column direction,
On the other hand, the display side surface of the vertical wall 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 15a is protected. Since the gaps r are formed between the discharge cells C and the layers 12, the discharge cells C adjacent to each other in the row direction are slightly communicated with each other via the gaps r. It has a feature that a priming effect is generated and the discharge operation can be stabilized.

However, in the PDP structure as described above, the protective layer 1 covering the raised dielectric layer 11A is not required.
2 and the lateral wall 15b are in contact with each other, and the gap between the adjacent discharge cells C in the column direction is completely closed. Therefore, the priming secured between the adjacent discharge cells C in the row direction as described above. The effect cannot be secured in the column direction at all, and therefore, the discharge delay time of the selective discharge in the address operation at the time of image formation becomes long.

To stabilize the selective discharge,
It is necessary to widen the pulse width of the drive pulse applied at the time of the address operation, but as a result, there is a problem that the time required for the address operation becomes longer.

The present invention has been made to solve the problems in the above-described surface discharge type AC plasma display panel. That is, the present invention
It is an object of the present invention to ensure a sufficient priming effect in a plasma display panel in which a unit light emitting region adjacent in a column direction is partitioned by a partition.

[0037]

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, a plurality of row electrode pairs extending in the row direction and juxtaposed in the column direction to form respective display lines and a dielectric layer covering the row electrode pairs are provided. A plasma display panel in which a plurality of column electrodes extending in the column direction and arranged in the row direction and intersecting with the row electrode pairs and each forming a unit light emitting region in the discharge space are provided on the side facing the discharge space. A partition wall that is arranged between the front substrate and the rear substrate and extends in the column direction and a horizontal wall portion that extends in the row direction to partition the discharge space in the row direction and the column direction for each unit light emitting region Wherein the horizontal wall portions between the unit light-emitting regions arranged along adjacent rows are separated by a gap parallel to the row direction, and the row electrodes located in back-to-back relationship with the adjacent row electrode pairs face each other. A discharge portion for generating a discharge in a space in the gap is formed at a portion where the discharge space of the unit light emitting region adjacent to the space in the column direction is communicated with each other by a communication portion. It is characterized by.

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 divided for each unit light emitting area by the partition having the vertical wall extending in the column direction and the horizontal wall extending in the row direction. And, in addition,
The horizontal wall portions between the unit light-emitting regions arranged along the rows adjacent to each other are separated by a gap parallel to the row direction, and the gap between the separated horizontal wall portions is separated by the communicating portion into the unit adjacent to the column direction. Each is communicated within the discharge space of the light emitting region.

A portion of one of the row electrodes on one side facing the other row electrode on the other side of the two row electrodes positioned back-to-back of an adjacent row electrode pair, for example, A discharge portion is formed by forming a required discharge gap at a position protruding in the direction of the electrode and facing a gap formed between the horizontal wall portions of the adjacent partition walls.

In this plasma display panel, when a required discharge for image formation is performed in each row electrode pair, a discharge unit provided between two row electrodes positioned back-to-back between adjacent row electrode pairs. As a result, a discharge is also generated in a space in the gap at a position facing the gap.

The discharge (priming discharge) in the discharge portion generates a pilot flame (priming particles) in the space in the gap, and the priming particles are discharged from the discharge space of the unit light emitting region adjacent to the space in the gap in the column direction. The light diffuses into the unit light-emitting regions on both sides through a communication portion that communicates with the inside.

As described above, according to the first aspect,
Even when the unit light emitting regions adjacent to each other in the column direction are closed by the horizontal wall portion of the partition, so-called priming discharge is performed in the gap formed between the horizontal wall portions defining the unit light emitting region. The priming particles generated by the priming discharge are diffused into the unit light emitting region adjacent in the column direction through the communicating portion, so that the priming particles cause image forming performed by each row electrode pair in the unit light emitting region. Required discharge is induced, and a so-called priming effect is exhibited.

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, a light absorbing layer is formed in a portion of the front substrate facing a space in the gap. It is characterized by being.

According to the plasma display panel of the second aspect, when the plasma display panel is viewed from the front, the space in the gap formed between the horizontal walls of the partition walls is covered by the light absorbing layer. Even if a so-called priming discharge is performed by the discharge portion in this gap, the light generated by the discharge is absorbed by the light absorbing layer. The adverse effects are prevented.

In order to achieve the above object, the plasma display panel according to the third invention has, in addition to the configuration of the first invention, at least one of opposing portions of the row electrodes positioned in a back-to-back relationship between adjacent row electrodes. The discharge unit is characterized in that one side protrudes to the other side and a discharge gap of a required size is formed between each other so as to oppose the space in the gap.

According to the plasma display panel of the third aspect, between the adjacent row electrode pairs, a part of the row electrodes facing each other may be shifted from one side to the other side or from both sides to each other. By projecting in the direction of the other side, a discharge gap of a required size required to generate a discharge is formed opposite to each other at a position opposed to the gap formed between the lateral walls of the partition walls. Thus, a discharge unit for generating a so-called priming discharge in the space in the gap is configured.

According to a fourth aspect of the present invention, there is provided a plasma display panel according to the third aspect, wherein the row electrode generates a discharge in a unit light emitting region and the transparent electrode. The discharge gap is formed by projecting at least one side transparent electrode of the row electrode positioned back-to-back of the adjacent row electrode pair toward the other side transparent electrode. It is characterized by being formed.

According to the plasma display panel of the fourth aspect, in the unit light emitting region of the transparent electrode constituting the row electrode, the portion opposite to the portion causing the discharge is opposed to the adjacent row electrode pair. Overhangs in the direction of the other transparent electrode forming the row electrode to form a discharge gap of a required size between the other transparent electrode and the discharge electrode to generate a discharge. A discharge unit for generating a so-called priming discharge is formed in the space in the gap.

The discharge portion is formed by the transparent electrode on one side extending toward the other side, or
It is constructed by projecting from both sides toward each other.

According to a fifth aspect of the present invention, there is provided a plasma display panel according to the third aspect, wherein the row electrodes generate a discharge in a unit light-emitting region and the transparent electrodes. The discharge gap is formed by projecting at least one bus electrode of the row electrode positioned back-to-back of the adjacent row electrode pair toward the other bus electrode. It is characterized by being formed.

According to the plasma display panel of the fifth aspect, a part of the bus electrode forming the row electrode is oriented in the direction of the other bus electrode forming the opposite row electrode of the adjacent row electrode pair. A discharge gap of a required size required to generate a discharge between the other bus electrode and the other bus electrode is formed, thereby forming a discharge for generating a so-called priming discharge in a space in the gap. Unit is configured.

The discharge portion is formed by projecting the bus electrode on one side toward the other side, or
It is constructed by projecting from both sides toward each other.

According to a sixth aspect of the present invention, in order to achieve the above object, in addition to the configuration of the first aspect, the first row electrode and the second row electrode forming the row electrode pair are arranged in the column direction. Wherein the discharge portions are formed between the first row electrodes or the second row electrodes of the adjacent row electrode pairs facing each other.

According to the plasma display panel of the sixth aspect, one of the two row electrodes of the first row electrode and the second row electrode forming the row electrode pair forms, for example, an image. Row electrodes are arranged in such a manner that the first row electrodes and the second row electrodes are alternately replaced in the column direction in a column direction. Thereby, one row electrode involved in the selective discharge of the adjacent row electrode pair faces each other.

By forming a discharge portion between one of the row electrodes involved in the opposing selective discharge, a discharge by this discharge portion can be generated only when the selective discharge is performed. Become.

According to a seventh aspect of the present invention, in order to achieve the above object, in addition to the configuration of the third aspect, the size of the discharge gap is larger than the discharge gap between the row electrodes in each row electrode pair. Is also set to be small,
A so-called priming discharge is likely to occur in a discharge portion formed between adjacent row electrode pairs, and the priming effect is reliably ensured.

According to an eighth aspect of the present invention, there is provided a plasma display panel according to the first aspect, further comprising a row electrode in which the discharge portions are formed to face each other back to back in addition to the configuration of the first aspect. A priming discharge portion for generating a discharge in a space in the gap is formed in a portion located in a non-display area of the panel.

According to the plasma display panel of the eighth aspect, a row electrode of an adjacent pair of row electrodes constituting a discharge section for so-called priming discharge extends into the non-display area of the plasma display panel. In the portion, a priming discharge portion facing each other via a discharge gap is further formed at a position facing the gap between the horizontal wall portions of the partition walls, and also in this priming discharge portion, image forming for each row electrode pair is performed. Priming discharge is generated when the required discharge is performed.

As described above, by providing a discharge portion for priming discharge in the non-display region of the plasma display panel in which a discharge space for priming discharge is easily secured, a structure different from that in the display region can be obtained. By providing a discharge portion that easily generates a discharge, the priming discharge can be reliably generated, and the priming effect can be further increased.

According to a ninth aspect of the present invention, in order to achieve the above object, in addition to the configuration of the first aspect, the plasma display panel further includes a lateral wall portion and a dielectric layer portion facing the gap. A raised portion is formed so as to protrude to the side and closes between the unit light emitting regions adjacent to each other in the column direction together with the horizontal wall portion, and a thickness of a portion of the raised portion facing the discharge portion is thicker than other portions. It is characterized by being thin.

According to the plasma display panel of the ninth aspect, the raised portion formed to close the space between the adjacent unit light-emitting regions is formed by the discharge portion formed between the adjacent row electrodes and the discharge portion. Although it is interposed between the gap between the horizontal wall portions where the so-called priming discharge is generated, a concave portion is formed in a portion of the raised portion facing the discharge portion, and the thickness of this portion is increased by the raised portion. Since the thickness of the other portion is smaller than that of the other portion, discharge by the discharge portion in the space in the gap is easily generated.

According to a tenth aspect of the present invention, in order to achieve the above object, in addition to the structure of the first aspect, a horizontal wall portion of the partition wall and a portion of the dielectric layer opposed to the gap are provided. A raised portion is formed so as to protrude to the side and closes between the unit light emitting regions adjacent to each other in the column direction together with the horizontal wall portion, and the communication portion is formed in the raised portion.

According to the plasma display panel of the tenth aspect of the present invention, the space between the unit light emitting regions adjacent in the column direction is closed by the raised portion and the horizontal wall formed on the dielectric layer so as to project toward the horizontal wall. In addition, the occurrence of erroneous discharge between the unit light emitting regions adjacent in the column direction is prevented, and the gap between the separated horizontal wall portions formed in the raised portion and the unit light emitting region adjacent in the column direction are formed. The priming particles generated by the discharge by the discharge unit in the space in the gap are diffused into the unit light emitting region adjacent in the column direction to induce a discharge, thereby causing the priming particles to be adjacent in the column direction. The priming effect between the unit light emitting regions is secured.

A plasma display panel according to an eleventh aspect of the present invention is characterized in that, in order to achieve the above object, in addition to the configuration of the first aspect, the communication portion is formed on a lateral wall of a partition. .

According to the plasma display panel of the eleventh aspect, even when the unit light emitting regions adjacent in the column direction are closed by the horizontal walls of the partition walls, they are adjacent to the gap between the horizontal walls in the column direction. The priming particles generated by the discharge by the discharge unit in the space in the gap are diffused into the unit light emitting region adjacent in the column direction to induce the discharge by the communicating portion communicating with the unit light emitting region, thereby causing a discharge. In addition, a priming effect between adjacent unit light emitting regions in the column direction is ensured.

According to a twelfth aspect of the present invention, in order to achieve the above object, in addition to the configuration of the first aspect, the height of at least a part of the horizontal wall portion of the partition wall is higher than the height of the vertical wall portion. Also, a gap is formed between the lateral wall portion and the dielectric layer to form a communicating portion.

According to the plasma display panel of the twelfth aspect, the height of the horizontal wall portion of the partition wall is lower than the height of the vertical wall portion even when the unit light emitting regions adjacent in the column direction are closed. The priming particles generated by the discharge by the discharge unit in the space in the gap due to the communication part formed in the portion that is diffused into the unit light emitting region adjacent in the column direction to induce the discharge, The priming effect between adjacent unit light emitting regions in the column direction is ensured.

[0068]

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

FIGS. 1 to 6 show a first embodiment of a plasma display panel (hereinafter referred to as a PDP) according to the present invention. FIG. 1 schematically shows a PDP in the first embodiment. FIG. 2 is a plan view of FIG.
FIG. 3 is a sectional view taken along line V3-V3 of FIG.
4 is a sectional view taken along line W3-W3 in FIG. 1, FIG. 5 is a sectional view taken along line W4-W4 in FIG.
FIG. 6 is a sectional view taken along line W5-W5 in FIG.

In the PDP shown in FIGS. 1 to 6, a plurality of pairs of row electrodes (X1, Y1) are provided on the rear surface of a front glass substrate 10, which is a display surface, in the row direction of the front glass substrate 20 (left and right in FIG. 1). Direction) are arranged in parallel to extend
Each pair of row electrodes X1 and Y1 constitutes one display line (row) Li of the matrix display.

The row electrode X is formed of a T-shaped ITO
And the like, and a bus electrode X1b made of a metal film extending in the row direction of the front glass substrate 20 and connected to a narrow base end of the transparent electrode X1a.

Similarly, the row electrode Y1 is formed between a transparent electrode Y1a formed of a transparent conductive film such as ITO formed in a T shape and a narrow base end of the transparent electrode Y1a extending in the row direction of the front glass substrate 20. Bus electrode Y1b made of connected metal film
, The transparent electrode X1 of the row electrode X1
a are separated from each other, and each of the bus electrodes X1b is individually
On the other hand, each transparent electrode Y1a of the row electrode Y1 is arranged such that the base end thereof is overlapped with the bus electrode Y1b, and extends in the row direction.
Are connected to each other by 1a '.

The row electrodes X1 and Y1 are arranged such that their positions are alternately changed to X1-Y1, Y1-X1 for each display line Li.

Then, in each row electrode pair (X1, Y1), the transparent electrodes X1a and Y1a arranged in parallel along the bus electrodes X1b and Y1b extend to the paired row electrode side, respectively. The tops of the wide portions are opposed to each other via a discharge gap g1 having a required width.

Further, row electrodes Y (X1, Y1) adjacent to each other in the column direction,
One transparent electrode main body Y1a 'is formed with protrusions Y1a "alternately protruding toward the other transparent electrode main body Y1a' at portions corresponding to the transparent electrodes Y1a on the sides facing each other. In addition, the tip surface of the protruding portion Y1a ″ is opposed to the side surface of the other transparent electrode main body portion Y1a ′ via a discharge gap g2 smaller than the discharge gap g1 between the transparent electrodes X1a and Y1a.

The bus electrode Y1b of each row electrode Y1
Of the row electrode Y1b of the other row electrode Y1 that is positioned back to back, and a portion of the priming discharge transparent electrode Y1 that is opposite to the bus electrode Y1b.
c and Y1c 'are formed and are opposed to each other via a discharge gap g2'.

This priming discharge transparent electrode Y1c
Are formed of the same material as the transparent electrode Y1a and the transparent electrode main body Y1a ′, and the shape of the pair of priming discharge transparent electrodes Y1c and Y1c ′ facing each other is, in the example shown in FIG. The transparent electrode Y1c 'is formed so as to protrude toward the other priming discharge transparent electrode Y1c, but the material is not necessarily the transparent electrode Y1a or the transparent electrode main body Y as long as it is easy to generate a discharge.
It does not have to be the same as 1a ', and its shape can be arbitrarily set.

Each of the bus electrodes X1b and Y1b has a two-layer structure of black conductive layers X1b 'and Y1b' on the display surface side and main conductive layers X1b "and Y1b" on the rear surface side.

On the back surface of the front glass substrate 20, between the bus electrodes X1b and X1b of the row electrode pairs (X1, Y1) adjacent to each other and the bus electrode Y
A black light absorbing layer 27 extending along the row direction is formed between 1b and Y1b.

On the back surface of front glass substrate 20, a dielectric layer 21 is formed so as to cover row electrode pairs (X1, Y1), and the back surface of dielectric layer 21 is back-to-back with each other. The two bus electrodes X1b and Y
1b and a raised dielectric layer 21A protruding to the back side of the dielectric layer 21 is formed at a position facing the region between each of the two bus electrodes X1b and Y1b so as to extend in the row direction. Have been.

On the back side of the dielectric layer 21 and the raised dielectric layer 21A, a protective layer 22 made of MgO is formed.

On the other hand, the column electrodes D are provided on the display-side surface of the rear glass substrate 23 arranged in parallel with the front glass substrate 20.
Are extended in a direction (column direction) orthogonal to the row electrode pairs (X1, Y1) at positions opposed to the paired transparent electrodes X1a and Y1a of each row electrode pair (X1, Y1). They are arranged in parallel at intervals.

On the surface of the rear glass substrate 23 on the display side,
Further, a white dielectric layer 24 covering the column electrode D is formed, and a partition 25 is formed on the dielectric layer 24.

The partition walls 25 are formed by vertical walls 25 extending in the column direction at positions between the column electrodes D arranged in parallel with each other.
a and a lateral wall 25b extending in the row direction at a position facing the raised dielectric layer 21A, and is formed in a ladder shape by the ladder-shaped partition walls 25, whereby discharge between the front glass substrate 20 and the rear glass substrate 23 is performed. The space S is a pair of transparent electrodes X1a in each row electrode pair (X1, Y1).
, And a rectangular discharge cell C is formed for each of the portions opposed to Y1a.

The partition walls 25 defining the discharge space S are separated from each other by a gap SL extending in the row direction.
The horizontal walls 25b of the adjacent partition walls 25 are arranged in the column direction so as to face each other via the gap SL.

The gap SL is located at a position opposed to each of the two bus electrodes X1b and Y1b, which are back-to-back, and the area between each of the two bus electrodes X1b and Y1b. As a result, the protrusion Y1a ″ of the transparent electrode Y1a in the gap SL is thereby provided.
A priming discharge cell C1 is formed in a portion opposing the discharge gap g2 between the adjacent transparent electrode main body portion Y1a '.

The vertical wall 25a of the partition wall 25 facing the discharge space S
A phosphor layer 26 is formed on the side surface of the horizontal wall 25b and on the surface of the dielectric layer 24 so as to cover all five surfaces, and the color of the phosphor layer 26 is changed for each discharge cell C. The colors are color-coded so that red (R), green (G), and blue (B) are arranged in the row direction in this order. Then, a discharge gas is sealed in the discharge cell C.

The raised dielectric layer 21A is formed by bringing the protective layer 22 covering the raised dielectric layer 21A into contact with the display side surface of the horizontal wall 25b of the partition wall 25, so that the discharge cells adjacent in the column direction are formed. C are respectively closed, but the raised dielectric layer 21A extends in the column direction at positions aligned with the vertical walls 25a of the partition walls 25 in FIG. A groove 21Aa (see FIGS. 3 and 5 and 6) is formed on the wall surface of each of the cells and the back side is opened, and each of the discharge cells C is arranged in parallel in the column direction through the groove 21Aa. 25 are communicated with each other in the gap SL between the horizontal walls 25b.

Also, the display side surface of the vertical wall 25a of the partition wall 25 is not in contact with the protective layer 22 (see FIG. 4), and a gap r is formed therebetween, and the discharge cells adjacent in the row direction are formed. C communicate with each other via the gap r.

The display of the image of the PDP is performed as follows. That is, as shown in FIG. 7, first, reset pulses RPx and RPy are applied to the row electrodes X1 and Y1 during the simultaneous reset period Rc to reset all the discharge cells between the column electrode D and the row electrode X1 or Y1. The discharge is performed to form wall charges on the surface of the dielectric layer 11 of all the discharge cells C.

Next, a row electrode Y1 is applied to each discharge cell C by a line-sequential address operation in the address period Wc.
When the scanning pulse SP is applied to the display electrodes Li, the opposing discharge (selective discharge) is selectively performed between the transparent electrode Y1a and the column electrode D, and the lighting cells (the wall charges of the dielectric layer 21 are discharged) on all the display lines Li. Discharge cells that have not been erased) and unlit cells (discharge cells in which the wall charge of the dielectric layer 21 has been erased) are scattered on the panel in accordance with the image to be displayed.

At this time, the scanning pulse SP is applied to each row electrode Y1 in the priming discharge cell C1 in the gap SL.
Is applied, the transparent electrode body portion Y1 adjacent to the protruding portion Y1a ″ facing each other via the discharge gap g2.
A priming discharge p is generated with respect to a ′.

The priming discharge cell C1
Priming particles (seeds) generated by the priming discharge p in the inside diffuse into the adjacent discharge cells C in the column direction via the respective grooves 21Aa formed in the raised dielectric layer 21A.

After this address operation, sustain discharge period Ic
At the same time, the row electrodes X1 and Y1
Are applied alternately to each other, and each time the sustaining pulses IPx and IPy are applied, the transparent electrodes X1a facing each other in each lighting cell.
And Y1a generates a surface discharge (sustain discharge).

As described above, the ultraviolet rays are generated by the surface discharge in the lighting cell, and the red (R),
Each of the phosphor layers 26 that are color-coded into the three primary colors of green (G) and blue (B) is excited to emit light, thereby forming a display image.

In the sustain discharge period Ic,
The gap S is generated by the priming discharge p in the address period Wc.
Priming particles (seeding) generated in the L and diffused into each lighting cell via the groove 21Aa of the raised dielectric layer 21A exhibit a so-called priming effect in which a sustain discharge for image formation is induced.

As a result, the gap between the discharge cells C adjacent in the column direction is closed by the raised dielectric layer 21A to prevent erroneous discharge from occurring between the discharge cells C adjacent in the column direction. In addition, it is not necessary to lengthen the discharge delay time of the selective discharge in the address period Wc, and it is not necessary to increase the pulse width of the scan pulse SP in order to stabilize the selective discharge.

As a result, the ratio of the address period Wc in one field can be reduced, the number of subfields can be increased to increase the gradation, and the sustaining pulse I in each subfield can be increased.
The brightness can be improved by increasing the number of Px and IPy.

Further, in the above PDP, a pair of priming discharge transparent electrodes Y1c provided on two bus electrodes Y1b positioned back to back in a non-display area of the PDP and opposed to each other via a discharge gap g2 '.
Also, a priming discharge occurs during the address period Wc between and Y1c ′, and the priming effect as described above is increased.

As described above, the priming discharge is generated by providing the priming discharge transparent electrode Y1c in the non-display area of the PDP where it is easy to secure a discharge space for the priming discharge. By providing a priming discharge transparent electrode having a structure different from that described above, the priming discharge can be easily generated, so that the priming effect can be further increased.

For example, as shown in FIG. 8, the other priming discharge transparent electrode Y1c 'facing the priming discharge transparent electrode Y1c is formed so as to be larger in size than the priming discharge transparent electrode Y1c. According to the method, priming discharge can be reliably generated.

In the above-mentioned PDP, the discharge gaps g2 and g2 'in which the priming discharge is generated are set to be smaller than the discharge gap g1 between the transparent electrodes X1a and Y1a in each discharge cell C. This ensures that priming discharge is generated.

Further, in the above-mentioned PDP, the display surface side of the two bus electrodes Y1b located at a position facing the opening of the gap SL is constituted by the black conductive layer Y1b ', and the two bus electrodes Y1b are formed. A light absorbing layer 27 is disposed between the light absorbing layers 27, and when viewed from the display surface side of the front glass substrate 20, the opening of the gap SL is entirely covered by a black layer that absorbs light. By doing
Light emission due to the priming discharge p in the gap SL located at the non-display line is prevented from adversely affecting the image contrast.

Further, in the above PDP, the positions of the row electrodes X1 and Y1 are alternately set to X1-Y1, Y for each display line Li.
1-X1 is replaced and arranged,
Since the priming discharge cell C1 is constituted by the two row electrodes Y1 that are adjacent to each other back to back, a potential difference is generated in the discharge gaps g2 and g2 ′ during the simultaneous sustain discharge in the sustain discharge period Ic. The efficiency of the sustain discharge is prevented from being reduced.

However, each row electrode pair (X1, Y1)
Of the row electrodes X1 and Y1 in FIG.
In this case, a priming discharge is generated every time the reset pulses RPx and RPy, the scanning pulse SP, and the sustaining pulses IPx and IPy are applied.

In the above PDP, each row electrode Y
The shape and arrangement of the one protruding portion Y1a ″, the size of the discharge gap g2, and the like are set such that the priming discharge p is secured.
It can be set arbitrarily.

In the above description, the raised dielectric layer 2
An example is shown in which a groove 21Aa is formed in 1A and the discharge cell C communicates with the priming discharge cell C1 in the gap SL. May be formed on the horizontal wall 25b. Alternatively, the height of a part of the horizontal wall 25b may be lower than the height of the vertical wall 25a, so that the discharge cell C communicates with the inside of the gap SL. .

FIG. 9 shows a second embodiment of the present invention.
FIG. 4 is a plan view schematically showing the example of FIG. The PDP in the second example is different from the PDP in the first example in that the priming discharge cell C1 is formed in the gap SL by the patterning of the transparent electrode Y1a, whereas the row electrode Y1 is formed.
Of the priming discharge cell C in the gap SL as in the first example by patterning the bus electrode Y1b.
1.

That is, in FIG. 9, each row electrode pair (X
2, Y2), the arrangement of the row electrode X2 and the row electrode Y2, and the configuration of the partition and other parts are the same as those in the first example. The configuration of the transparent electrodes X2a and Ya is shown in FIG. It is the same as the conventional PDP, but between the adjacent row electrode pair (X2, Y2), on the opposite side of the bus electrode Y2b, protrudes to the other bus electrode Y2b, and between the other bus electrode Y2b. The protruding portions Y2b 'forming the discharge gap g2 are formed so as to be staggered along the row direction, and the priming discharge cells C1 are provided at portions facing the discharge gap g2 in the gap SL between the horizontal walls 25b.
Is formed.

Similarly to the first PDP, the PDP in this example is generated between the protruding portion Y2b 'of the bus electrode Y2b and the other bus electrode Y2b opposed thereto in the address period Wc during image formation. The priming discharge generates priming particles in the gap SL, and the priming particles diffuse into the adjacent discharge cells C in the column direction, thereby exhibiting a priming effect on the sustain discharge in the sustain discharge period Ic.

Note that the projecting portion Y2 of the bus electrode Y2b
The shape and arrangement of b ′ are not limited to the illustrated example, and can be set arbitrarily as long as priming discharge is ensured.

FIG. 10 is a plan view schematically showing a third example of the embodiment of the present invention. The PDP according to the third example is the same as the PDP according to the first example described above, except that between the row electrodes Y1 of the raised dielectric layer 21A 'formed at positions opposed to the two row electrodes Y1 positioned back to back with each other. A recess 21Ab recessed toward the front glass substrate 20 is formed in a portion facing the discharge gap g2, and the thickness m1 of the raised dielectric layer 21A 'in the portion facing the discharge gap g2 is different from that in the other portions. It is formed to be thinner than the thickness m2.

As described above, the portion of the raised dielectric layer 2 facing the discharge gap g2 where the priming discharge is generated
When the thickness of 1A 'is small, priming discharge is likely to occur, whereby the priming effect at the time of sustain discharge is reliably ensured.
The configuration of other parts of the PDP in this example is similar to that of the PDP of the first example.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing a first example of the present invention.

FIG. 2 is a sectional view taken along line V3-V3 in FIG.

FIG. 3 is a sectional view taken along line V4-V4 of FIG.

FIG. 4 is a sectional view taken along line W3-W3 of FIG.

FIG. 5 is a sectional view taken along line W4-W4 of FIG.

FIG. 6 is a sectional view taken along line W5-W5 in FIG. 1;

FIG. 7 is a timing chart showing a state of occurrence of priming discharge in the same example.

FIG. 8 is a plan view schematically showing a modified example of a priming discharge section provided in a non-display area of the plasma display panel in the same example.

FIG. 9 is a plan view schematically showing a second example of the present invention.

FIG. 10 is a side sectional view schematically showing a third example of the present invention.

FIG. 11 is a plan view schematically illustrating a configuration of a conventional PDP.

FIG. 12 is a sectional view taken along line VV in FIG. 11;

FIG. 13 is a sectional view taken along line WW of FIG. 11;

FIG. 14 is a plan view schematically showing a PDP according to the earlier proposal of the applicant.

FIG. 15 is a sectional view taken along line V1-V1 of FIG.

16 is a sectional view taken along line V2-V2 in FIG.

FIG. 17 is a sectional view taken along line W1-W1 of FIG. 14;

18 is a sectional view taken along line W2-W2 in FIG.

[Explanation of symbols]

Reference Signs List 20 front glass substrate (front substrate) 21 dielectric layer 21A, 21A '... raised dielectric layer (raised portion) 21Aa ... groove (communication portion) 21Ab ... concave portion 22 ... protective layer 23 ... rear glass substrate (rear substrate) 24 Dielectric layer 25 Partition wall 25a Vertical wall (vertical wall) 25b Horizontal wall (horizontal wall) 26 Phosphor layer 27 Light absorption layer X1, X2 Row electrode Y1, Y2 Row electrode X1a, X2a Transparent electrode Y1a, Y2a ... Transparent electrode Y1a '... Transparent electrode body (discharge part) Y1a "... Projection part (discharge part) Y1c, Y1c' ... Transparent electrode for priming discharge (priming discharge part) X1b, X2b ... Bus electrode Y1b , Y2b ... bus electrode Y2b '... projecting part (discharge part) X1b', Y1b '... black conductive layer X1b ", Y1b" ... main conductive layer D ... column electrode S ... discharge space SL ... gap C: Discharge cell (unit light emitting area) C1: Priming discharge cell Li: Display line g1, g2, g2 ': Discharge gap r: Gap p: Priming discharge

Continuation of the front page F term (reference) 5C040 FA01 FA04 GB02 GC06 GD01 GH05 LA08 MA17 5C080 AA05 BB05 CC03 CC06 DD09 DD30 HH04 HH06 JJ04 JJ06

Claims (12)

[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 facing the front substrate of the rear substrate via the discharge space,
In a plasma display panel provided with a plurality of column electrodes extending in the column direction and arranged in the row direction and intersecting with the row electrode pair, each of which forms a unit light emitting region in the discharge space, the front substrate and the rear substrate Partition walls that are arranged between the vertical wall portions extending in the column direction and the horizontal wall portions extending in the row direction to partition the discharge space in the row direction and the column direction for each of the unit light-emitting regions, Horizontal wall portions between the unit light-emitting regions arranged in a row are separated by a gap parallel to the row direction, and discharge is generated in a space in the gap at opposing portions of the row electrodes positioned back to back of the adjacent row electrode pairs. A discharge portion to be formed is formed, and the space in the gap and the discharge space of the unit light emitting region adjacent in the column direction are communicated with each other by a communication portion. Plasma display panel. 2. The plasma display panel according to claim 1, wherein a light absorbing layer is formed in a portion of the front substrate facing a space in the gap. 3. A required size in which at least one side of the opposing portions of the row electrodes located at the back-to-back position of adjacent row electrode pairs projects to the other side and opposes the space in the gap between each other. The plasma display panel according to claim 1, wherein the discharge portion is formed by forming a discharge gap. 4. The row electrode is constituted by a transparent electrode for generating a discharge in a unit light emitting region and a bus electrode connected to the transparent electrode, and at least one of the row electrodes located in a back-to-back relationship with an adjacent pair of row electrodes. The transparent electrode on one side projects toward the transparent electrode on the other side,
The plasma display panel according to claim 3, wherein the discharge gap is formed. 5. The row electrode is constituted by a transparent electrode for generating a discharge in a unit light emitting region and a bus electrode connected to the transparent electrode, and at least one of the row electrodes positioned in a back-to-back relationship between adjacent row electrode pairs. By projecting the bus electrode on one side toward the bus electrode on the other side,
The plasma display panel according to claim 3, wherein the discharge gap is formed. 6. A first row electrode and a second row electrode constituting the row electrode pair are alternately arranged in the column direction and arranged, and the discharge unit is arranged such that the first row electrode and the adjacent row electrode pair oppose each other. The plasma display panel according to claim 1, wherein the plasma display panel is formed between row electrodes or between second row electrodes. 7. The plasma display panel according to claim 3, wherein a size of the discharge gap is set to be smaller than a discharge gap between row electrodes in each row electrode pair. 8. A priming discharge unit for generating a discharge in a space within the gap is provided at a portion of a row electrode where the discharge unit is formed so as to face each other back to back and is located in a non-display area of a plasma display panel. The plasma display panel according to claim 1, wherein the plasma display panel is formed. 9. A raised portion formed on a portion of the dielectric layer facing the horizontal wall portion and the gap of the partition so as to protrude toward the horizontal wall portion and closes between the unit light emitting regions adjacent to the horizontal wall portion in the column direction. The plasma display panel according to claim 1, wherein a thickness of a portion of the raised portion facing the discharge portion is smaller than that of the other portion. 10. A raised portion formed on a portion of the dielectric layer facing the horizontal wall portion and the gap of the partition so as to protrude toward the horizontal wall portion, and closes a space between the unit light emitting regions adjacent in the column direction together with the horizontal wall portion. The plasma display panel according to claim 1, wherein the communication portion is formed in the raised portion. 11. The plasma display panel according to claim 1, wherein the communication portion is formed on a lateral wall of a partition. 12. The height of at least a part of the horizontal wall portion of the partition wall is lower than the height of the vertical wall portion,
2. The plasma display panel according to claim 1, wherein a gap is formed between the lateral wall portion and the dielectric layer to form a communication portion.