JP3251624B2 - Surface discharge type plasma display panel - Google Patents

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 plasma display panel having partition walls for partitioning a discharge space.
DP).

2. Description of the Related Art A matrix display type PDP displays characters and figures by selectively emitting light in unit light emitting areas arranged vertically and horizontally. Among these types of PDPs, for example, in a surface discharge type PDP suitable for color display using a phosphor, a partition wall for limiting the spread of discharge to a unit light emitting region is provided.

[0003]

2. Description of the Related Art FIGS. 3A to 3C show a conventional PDP 1j.
FIG. 3 is a diagram showing the structure of FIG. 3A is a plan view as viewed from the display surface side, FIG. 3B is a cross-sectional view taken along line BB in FIG. 3A,
FIG. 3C is a cross-sectional view taken along the line CC of FIG. 3A.

A PDP 1j is a surface discharge type PD having a three-electrode structure.
P, a pair of glass substrates 1 on the display surface H side and the back side
1, 21; display electrodes 13 and 14, which extend parallel to and adjacent to each other on the inner surface of one glass substrate 11, dielectric layer 15 for AC driving, partition wall 19j having a lattice shape in plan view, and the other glass substrate An address electrode 22 extending in a direction orthogonal to the display electrodes 13 and 14 on the inner surface of the address electrode 21;
A planar shape extending in parallel with the above is constituted by a strip-shaped partition wall 29 and a phosphor 28 of a predetermined emission color. Note that a protective film made of MgO (not shown) is provided on the surface of the dielectric layer 15 at a stage after the formation of the partition wall 19j.

The internal discharge space 30 is divided for each unit light emitting area EU by a partition wall 19j for localizing the spread of the discharge, and the gap dimension is defined by the partition wall 19j and the partition wall 29 contacting each other. Are defined uniformly throughout the entire system.

In the PDP 1j, as shown in FIG. 3A, a main discharge cell C1 is defined by the display electrodes 13 and 14 for each unit light emitting area EU of the matrix display, and one display electrode (for example, the display electrode 14). ) And address electrode 22
Defines the selected discharge cell C2.

In the main discharge cell C1, discharge (surface discharge) in the surface direction of the dielectric layer 15 occurs as shown by a broken line in FIG. 3 (b). At this time, the fluorescent light is emitted by the ultraviolet rays emitted from the discharge gas in the discharge space 30. The body 28 is excited to emit light. Further, in the selective discharge cell C2, as shown by a broken line in FIG. 3 (c), a discharge (opposite discharge) occurs in the direction in which the glass substrates 11 and 21 are opposed to each other. Control is performed, and light emission or non-light emission of the unit light emitting region EU is selected (addressed).

In manufacturing the PDP 1j having the above configuration, predetermined components are separately provided for each of the glass substrates 11 and 21, and then the glass substrates 11 and 21 are arranged to face each other to seal the periphery.

At this time, on the glass substrate 11 side, the partition wall 19j is formed by firing a low melting point glass paste. That is, the glass substrate 1 provided with the dielectric layer 15
Using a screen mask having a lattice-shaped opening pattern, a low-melting glass paste mixed with a large amount of an inorganic filler is printed 5 to 6 times on a screen mask having a lattice-shaped opening pattern, for example. By applying a heat treatment at a temperature of about 500 ° C., a partition wall 19j having a thickness of about 50 μm is formed.

[0010]

However, in screen printing, if attention is paid to the amount of a printed material (here, a low-melting glass paste) extruded from a screen mask, if the printing pattern is a grid-like pattern, Tends to be larger than the other portions.

Normally, the extruded printed material spreads by its own weight on the surface to be printed, so that the thickness of the printed material is slightly uniformed, but the difference in thickness between the intersection and the other portions is small. Hardly change. Then, when printing of the same pattern is repeated, the difference in thickness is accumulated.

For this reason, in the conventional PDP 1j, the crossing portion of the grid in the partition wall 19j on the display surface H side is higher than other portions, as shown in FIGS. 3 (b) and 3 (c). , Partition wall 19j and rear partition wall 29 in contact with partition wall 19j
There is a problem that a gap 50 having a relatively large vertical dimension may be formed between them.

When such a gap 50 is generated, the opposing discharge between the address electrode 22 and the display electrode 14 is particularly caused by the discharge shown in FIG.
As shown by a chain line in FIG.
It is easy to unnecessarily spread to U, which may disturb the display.

The present invention has been made in view of the above problems, and has as its object to reduce the occurrence of display disturbance by optimizing the division of a discharge space by partition walls.

[0015]

Means for Solving the Problems The P according to the first aspect of the present invention.
In order to solve the above-described problem, the DP includes a pair of substrates 11 and 12 facing each other via a discharge space 30, as shown in FIG.
A surface discharge type having a pair of display electrodes 13 and 14 extending in parallel and adjacent to each other on one substrate 11 side and a partition wall 19 for partitioning the discharge space 30 for each unit light emitting area EU. In the plasma display panel 1, the partition wall 19 is provided so as to overlap a lower partition wall 19A having a lattice-like planar shape and a portion of the lower partition wall 19A extending in a direction orthogonal to the display electrodes 13 and 14. The upper partition 19B has a planar shape in the form of a band.

A PDP according to a second aspect of the present invention has a pair of display electrodes 13 and 14 and a partition wall 19 on one substrate 11 side, and is orthogonal to the display electrodes 13 and 14 on the other substrate 21 side. A surface discharge type plasma display panel 1 having address electrodes 22 extending in the direction of
A lower partition wall 19A having a lattice-like planar shape, and an upper partition wall 1 having a band-like planar shape provided so as to overlap a portion of the lower partition wall 19A extending in the direction in which the address electrode 22 extends.
It is made of and 9B. PD according to the invention of claim 3
P is a pair of substrates 11 facing each other via the discharge space 30,
12, a pair of indicia extending parallel to and adjacent to each other
The electrodes 13 and 14 extend in a direction orthogonal to the display electrodes.
Having an address electrode 22 and generating the discharge space as a unit.
A partition wall 19 for partitioning each optical region EU is provided on the substrate pair.
Surface discharge type plasma display provided on one inner surface
A lower partition wall 19A having a lattice shape in plan view
Of the address electrode 22 in the lower partition wall 19A.
The flat shape provided on the part extending in the extension direction
And an upper partition wall 19B.

[0017]

In forming the partition wall by screen printing, even if the height of the intersection of the lower partition wall having a lattice shape is higher than that of the other portions, the upper partition wall has a planar shape. By overlapping 19B, partition 1
As a whole, the height of a portion parallel to the address electrodes 22 orthogonal to the display electrodes 13 and 14 becomes substantially uniform.

[0018]

FIG. 1 is an exploded perspective view showing a sectional structure of a PDP 1 according to the present invention, and FIG. 2 is a sectional view of a main part of the PDP 1 of FIG. FIG. 2 shows a cross-sectional structure corresponding to FIG. In these drawings, components having the same functions as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted or simplified.

In FIG. 1, a PDP 1 has a three-electrode surface discharge type PDP in which a pair of display electrodes 13 and 14 and an address electrode 22 are associated with a unit light emitting region EU of a matrix display.
DP, which is configured to display a color other than the emission color of the discharge gas by the phosphor 28.

The display electrodes 13 and 14 for the surface discharge are arranged on the glass substrate 11 on the display surface H side, and are formed in the discharge space 30 by the dielectric layer 15 made of low melting point glass having a thickness of about 20 μm. Coated. The dielectric layer 1
The surface of No. 5 is made of MgO having a thickness of about 5000 mm (not shown).
A film is provided as a protective film.

An address electrode 22 for selectively emitting light in the unit light emitting region EU is disposed on the rear glass substrate 21 so as to be orthogonal to the display electrodes 13 and 14. The phosphor 28 is also arranged on the glass substrate 21 so as to avoid ion bombardment due to surface discharge.

The discharge space 30 is partitioned for each unit light emitting area EU by a partition wall 19 provided on the inner surface of the same substrate (the glass substrate 11 on the display surface H side) as the display electrodes 13 and 14. Further, the gap size of the discharge space 30 is determined by the partition wall 1.
The height of each of the partition walls 19 and 29 is defined as a value of about 100 μm by the band-shaped (striped) partition wall 29 on the rear side that comes in contact with the partition wall 9.

In the PDP 1, the partition wall 19 is a lower partition wall 19A having a lattice-like planar shape surrounding the unit light emitting region EU.
(Having a height of about 25 μm) and an upper partition wall 19B having a planar shape overlapping and integrated with a portion of the lower partition wall 19A orthogonal to the display electrodes 13 and 14. The height of the portion having the upper partition 19B is about 50 μm.

That is, the partition wall 19 is a portion that partitions the discharge space 30 in the unit light emitting area EU in the direction in which the display electrodes 13 and 14 extend, that is, a portion parallel to the address electrode 22 and the partition wall 29 on the three-dimensional structure. Is provided higher than other portions.

In manufacturing the PDP 1 having the above structure,
After the display electrodes 13 and 14 and the dielectric layer 15 are sequentially formed on the glass substrate 21, the partition 19 is formed by using a screen printing method.

First, the lower partition wall 19 is formed on the dielectric layer 15.
Using a screen mask having a lattice-shaped opening pattern corresponding to A, a paste composed of a low-melting glass powder and a binder (organic solvent) is printed only twice or three times.

At this time, since a larger amount of paste is extruded at the intersections of the lattices in the opening pattern than at other parts, the printed paste pattern has a shape in which the intersections of the lattices are raised.

Next, the above-mentioned paste is printed three to four times on the paste pattern having a part raised as described above, using a screen mask having a band-shaped opening pattern corresponding to the upper partition wall 19B. .

In the printing of a belt-shaped pattern, since the printed amount of the paste is substantially uniform in the pattern, the spread of the printed paste by its own weight is combined with the band-shaped two-layered paste pattern. The portion where the patterns are overlapped has a substantially uniform height so as to flatten the lower layer portion (grid-like portion).

Thereafter, the paste pattern having the two-layer structure is subjected to a heat treatment at about 500 ° C. and baked to obtain the partition wall 19 having the above-described structure. That is, PDP1
, The back side of the partition wall 19 (the upper surface of the partition wall 29)
By making the planar shape of the upper part of the portion in contact with the belt into a band shape, the height of the portion becomes uniform, and the partition wall 19 and the partition wall 29 become uniform in the extension direction of the address electrode 22 as well shown in FIG. Will be in contact with Therefore, since the discharge space 30 is completely cut off and partitioned in the direction in which the display electrodes 13 and 14 extend, high-quality display in which the spread of the counter discharge by the address electrode 22 is appropriately suppressed can be performed.

According to the above-described embodiment, the partitions 19 and 29 are provided on the display surface side and the rear surface side, respectively.
Since the gap size of the discharge space 30 is defined by 29, the height of the partition wall 19, which must have a grid-like planar shape in partitioning the unit light emitting region EU, is set to, for example, about half the gap size. Because it is possible, it is possible to suppress the expansion of the bottom area of the partition wall due to sagging at the time of forming the partition wall, which is advantageous in achieving higher definition.

In addition, since the planar shape of the partition wall 29 is band-shaped, an area on the back side of the discharge space 30 where the surface discharge does not reach is opened in the direction in which the address electrode 22 extends. In addition, the exhaust process after the substrates are opposed to each other is facilitated, and the efficiency of removing impurities in the discharge space 30 can be increased.

In the above embodiment, the height of the lower partition 19A and the entire height of the partition 19 are determined by the display electrodes 13 and 14.
And the arrangement pitch, the size of the unit light emitting region EU, and the like.

In the above-described embodiment, the reflection type PDP 1 in which the phosphor 28 is provided on the glass substrate 21 on the back side is illustrated. However, the phosphor 28 is provided on the glass substrate 11 on the display surface H side and the display is performed. The electrodes 13 and 14 are connected to the glass substrate 2 on the rear side.
The present invention can also be applied to a transmission type PDP provided on the first PDP. Further, the address electrode 22 is connected to the display electrodes 13, 1
4 to PDP arrangements the surface discharge on the same substrate as applicable.

[0035]

According to the present invention, the division of the discharge space by the partition walls can be optimized, and the display quality can be improved by suppressing the occurrence of display disturbance.

According to the second or third aspect of the present invention, when selecting a unit light emitting region to emit light, unnecessary spread of the opposing discharge caused by a defective shape of the partition wall that partitions the discharge space can be suppressed, and Disorder of display due to selection can be prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a cross-sectional structure of a PDP according to the present invention.

FIG. 2 is a sectional view of a main part of the PDP of FIG.

FIG. 3 is a diagram showing a structure of a conventional PDP.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 PDP 30 Discharge space 11, 21 Glass substrate (substrate) 13, 14 Display electrode EU Unit light emitting area 19 Partition 19A Lower partition 19B Upper partition 22 Address electrode

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-219438 (JP, A) JP-A-63-155528 (JP, A) JP-A-3-105828 (JP, A) JP-A-3-3 250536 (JP, A) JP-A-5-121006 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01J 11/00, 11/02

Claims (3)

(57) [Claims] To 1. A board-side one <br/> side of the pair of board which face each other with a discharge between the sky, a pair of display <br/> electrodes extending parallel and adjacent to each other, wherein surface discharge type plasma display panel having a septum wall for partitioning between the discharge air to each unit light emitting area
A is, the septum wall, planar shape provided so as to overlap with the portion extending in the direction in which the planar shape orthogonal lattice-shaped lower septum walls, and the display electrodes of the said lower <br/> septal wall Is a band-shaped upper partition wall . To 2. A board-side one <br/> side of the pair of board which face each other with a discharge between the sky, a pair of display <br/> electrodes extending parallel and adjacent to each other, wherein between the discharge sky and a septum wall for partitioning each unit light area, a surface discharge type plasma display panel having an address electrodes extending in a direction perpendicular to the other substrate side to the display electrodes a is, the septum wall, a lattice-shaped lower septal wall plane shape, planar shape provided so as to overlap with the portion extending in the extending direction of the address electrodes of the said lower <br/> septal wall surface discharge type plasma display panel, comprising the belt-like upper septum wall. To 3. inner surfaces of the pair of substrates opposing each other via a discharge space, and an address electrode extending in a direction perpendicular to the display electrodes and the pair of display electrodes extending parallel and adjacent to one another, and A partition wall for partitioning the discharge space for each unit light-emitting region is a surface discharge type plasma display panel provided on one inner surface of the substrate pair, wherein the partition wall has a planar shape of a lattice-shaped lower partition wall, A surface discharge type plasma display panel characterized in that the lower partition has an upper partition having a band shape in a plane shape provided so as to overlap with a portion extending in a direction in which the address electrode extends in the lower partition.