JP2001202877A - Display panel and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To overcome problems that miss-discharge is generated adjacent spaces and lowering of brightness is generated due to high fineness in a plasma display having stripe structure of partition walls. SOLUTION: This plasma display panel comprises a first insulation substrate having at least a scan electrode and mated holding electrode which are covered with a dielectric layer and a protection film layer, and a light shield layer disposed therebetween, and a second insulation substrate having a plurality of data electrodes covered with an insulation layer and partition walls disposed on the insulation layer, wherein the insulation substrates are opposed to each other through a discharge space. Barriers having a same height as the height of the partition walls are formed between the partition walls on the second insulation substrate and slit is formed on the partition walls to communicate adjacent discharge spaces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel used for a display device or the like.
In particular, the present invention relates to a method for forming a partition layer of a plasma display panel.

[0002]

2. Description of the Related Art FIG. 5 is a partial perspective view showing one embodiment of the structure of a conventional plasma display panel. In FIG. 5, a plurality of scan electrodes 4 and a plurality of sustain electrodes 5 covered with a dielectric layer 2 and a protective film layer 3 are provided in parallel on a first insulating substrate 1 while forming a pair. Scan electrode 4 to be formed
A light-shielding layer 6 is provided between each pair of the storage electrode 5 and the sustain electrode 5.

[0003] A plurality of data electrodes 9 covered with an insulator layer 8 are provided on a second insulating substrate 7, and are further provided on the insulator layer 8 between the data electrodes 9 in parallel with the data electrodes 9. A plurality of partitions are provided, and phosphor layers 11 are provided on the side surfaces of the partitions between the partitions 10 and on the surface of the insulator layer 8.

The first insulating substrate 1 and the second insulating substrate 7
Are arranged so as to face each other across a discharge space 12 so that the plurality of pairs of the scanning electrodes 4 and the sustain electrodes 5 are orthogonal to the data electrodes 9.

The scanning electrode 4 and the sustaining electrode 5 are formed by forming a transparent electrode 4a and bus bars 4b and 5b which are electrically connected to the transparent electrode 4a with a low resistance material such as silver. The resistance value of the electrode 5 is reduced.

As described above, the discharge space 1 corresponding to the intersection between the pair of the scanning electrode 4 and the sustain electrode 5 and one of the data electrodes 9 is provided.
Region 2 constitutes one discharge cell.

The discharge space 12 is filled with one or a mixture of helium, neon, argon, xenon, and the like as a discharge gas.

As described above, the conventional partition wall 10 has a simple stripe shape and is formed mainly by a method such as a sand blast method, a lift-off method, or a screen printing method.

[0009]

However, in the conventional panel described above, when the number of panel electrodes is increased in order to realize high definition, that is, the scanning electrodes 4 and the sustain electrodes 5 are provided on the first insulating substrate 1. When the number of the data electrodes 9 provided on the second insulating substrate 7 is increased, the interval between the partition walls 10 is reduced, and the discharge space is reduced to 12 regions, the following problem occurs. Was to do.

First, a discharge generated between a pair of a first scan electrode and a sustain electrode is generated between adjacent scan electrodes, and the display quality is reduced as erroneous discharge.

Second, since the width of the sustain discharge electrode is reduced due to the high definition, the sustain discharge is weakened, and the light emission luminance is weakened due to the reduced discharge space.

As a method of increasing the luminance, the luminance is gradually improved by improving the phosphor, improving the shape of the phosphor formed, optimizing the composition of the sealed gas and its partial pressure, and further improving the driving circuit. However, there is a limit in the current structure from the viewpoint of the light emitting area of the current partition stripe structure and the light emitting efficiency.

[0013]

In order to solve the above problems, at least a light shielding layer is provided between each pair of a plurality of pairs of scan electrodes and sustain electrodes covered with a dielectric layer and a protective film layer. A first insulating substrate, a plurality of data electrodes covered with an insulator layer, a plurality of partitions on the insulator layer, and a second insulating substrate having a phosphor layer disposed between at least the partitions,
The plasma display panel, wherein the plurality of pairs of scan electrodes and sustain electrodes are orthogonal to the plurality of data electrodes, and are arranged to face each other with a discharge space therebetween, wherein the first insulating substrate At a position facing the light-shielding layer, a barrier equal in height to the partition is provided between the partitions on the insulating substrate on the second insulating substrate, and a slit communicating the adjacent discharge space is provided in the barrier. Structure.

As a manufacturing method, a glass paste is applied, the glass paste is dried, a dry film resist is formed on the upper surface, the dry film is patterned, and the glass paste is removed from the dry film by a sand blast method. A method of manufacturing a plasma display panel for forming partition walls, wherein when forming a substantially square-shaped discharge space including a main partition wall and a barrier by sandblasting, an adjacent discharge in the main partition direction is formed on a dry film of a crosspiece in one direction. It is formed by providing one or a plurality of fine openings to the space and sandblasting them.

[0015]

Embodiments of the present invention will be described below.

(Overall Configuration and Manufacturing Method of PDP) FIG.
1 shows a schematic cross-sectional partial perspective view of the present invention.

In FIG. 1, a plurality of scan electrodes 4 and sustain electrodes 5 covered with a dielectric layer 2 and a protective layer 3 are provided in parallel on a first insulating substrate 1 in pairs. A light-shielding layer 6 is provided between each pair of the scan electrode 4 and the sustain electrode 5 forming a pair.

A plurality of data electrodes 9 covered with an insulator layer 8 are provided on the second insulating substrate 7 and the data electrodes 9
A plurality of barrier ribs 10 are provided in parallel with the data electrodes 9 on the insulator layer 8 between them.

Between the partitions on the second insulating substrate, a barrier 13 is provided on the first insulating substrate 1 at a position facing the light shielding layer 6.
The phosphor layer 11 is provided on the side surfaces of the partition walls between the partition walls 10, the side surfaces of the barriers 13, and the surface of the insulator layer 8.
Is provided.

The first insulating substrate 1 and the second insulating substrate 7 are arranged in a discharge space 1 such that the plurality of pairs of the scanning electrodes 4 and the sustaining electrodes 5 are orthogonal to the data electrodes 9.
2 are arranged opposite to each other.

In this panel, the region of the discharge space 12 corresponding to the intersection of the pair of the scan electrode 4 and the sustain electrode 5 and one of the data electrodes 9 constitutes one discharge cell. The discharge space 12 is filled with one or a mixture of helium, neon, argon, and xenon as a discharge gas.

At this time, the difference from the conventional panel is that a barrier is provided between the partition walls 10 on the insulator layer 9 on the second insulating substrate 7 and at a position facing the light shielding layer 6 on the first insulating substrate 1. 13 is provided. Further, the barrier 13 is at the same height as the partition 10, and is adjacent to the discharge space 1.
That is, a slit 16 communicating the discharge space 4 with the discharge space 15 is provided.

The present invention also relates to a method of manufacturing the second insulating substrate 7, particularly the partition wall 10 and the barrier 13, and an embodiment of manufacturing the rear panel using the second insulating substrate as a rear panel will be described.

This back panel is usually manufactured by the following manufacturing process.

That is, a data electrode 9 such as silver is formed on a rear glass substrate, which is an insulating substrate 7, by a screen printing method or the like, and a glass dielectric is formed by a printing method to form an insulating layer 8, on which a thick film is formed. The insulating partition walls 10 are formed at a predetermined pitch by printing and sandblasting, and the like.
Further, a phosphor layer 11 of a red phosphor, a green phosphor, and a blue phosphor is formed in each space sandwiched by the partition walls 10 by a printing method or the like. At this time, the following is used as the phosphor powder.

Red phosphor: (Y _X Gd _{1 -X} ) BO ₃ : Eu
³⁺ or YBO ₃ : Eu ³⁺ green phosphor: BaAl ₁₂ O ₁₉ : Mn or Zn ₂ Si
O ₄ : Mn Blue phosphor: BaMgAl ₁₀ O ₁₇ : Eu ²⁺ Further, an embodiment of the partition wall forming method of the present invention will be described with reference to FIG.

FIG. 2 is a perspective view of a partition wall according to the prior art and the present invention. In the figure, FIG. 2-A shows a conventional partition shape, and FIG. 2-B shows a partition shape of the present invention.

In the conventional case, the partition walls 20a, 20b, 20c
Are address electrodes 21 provided at the bottom of each
It is formed in a stripe shape in a direction parallel to a and 21b, and an address electrode is provided between partition walls. A dielectric 22 is formed on the address electrodes 21a and 21b. As described above, the barrier ribs have a stripe shape, and the phosphor layers are formed on the inner surfaces of the barrier ribs.

On the other hand, in the case of FIG. 2B, barriers 22a, 22b, 2B are provided between the partition walls 20a, 20b, 20c shown in FIG.
2c and 22d are provided. These barriers have the same height as the partition walls 20a, 20b, and 20c, and each barrier is provided with a slit 24 that communicates with the adjacent discharge spaces 23a and 23b. The distance between the barriers corresponds to one pixel in the vertical direction of the screen, and is provided at a position facing the light shielding layer provided on the first insulating substrate as described above.

In the present invention, a method for forming a barrier having a partition and a communicating slit will be described.

(First Embodiment) With reference to FIG. 3, a method of manufacturing a plasma display panel according to a first embodiment of the present invention, particularly, a partition wall will be described. FIG. 3A shows a process flow.

First, 1) A thick glass paste 26 serving as a partition and a barrier material is applied on a glass substrate 25 on which an address electrode and a dielectric layer are formed, and dried. next,
2) Laminating a dry film 27 having sandblast resistance on the upper surface, and performing exposure and development processing so that a hatched area 28 of the film is opened as shown in FIG.
3) The glass paste 26 is cut and removed from the upper portion of the film by a sand blast device 32. Thereafter, 4) the film 27 is peeled off to form a grid-shaped partition wall 30, which is baked to form a back substrate having a shape as shown in FIG. 2-B. The back substrate of the plasma display panel is completed by forming a phosphor film on the bottom of the substrate.

At this time, as shown in FIG. 3B, when laminating the dry film 27, exposing and developing to form a cutting pattern, the barrier forming portion 29 which intersects with the main partition wall forming portion 28 is striped. Forming a pattern 31;
Sandblast. By doing so, it is possible to prevent erroneous discharge in the adjacent discharge space of the plasma display and to form a stripe pattern having a width and a depth that does not impair the exhaust performance in the exhaust process by one sandblast. .

The cutting depth D depending on the opening width W of the stripe pattern varies depending on the blast conditions, but changes as shown in FIG.

That is, as the stripe opening width W increases in unit of the maximum diameter d of the cutting particles to 1.2 d, the cutting depth D increases as the width increases, but when the stripe opening width W is 1.2 d or more, the cutting depth D increases. Is almost saturated. This indicates that the depth D of cutting can be controlled by selecting the stripe opening width with respect to the particle diameter.

In the present invention, a plasma display panel having a 42-inch VGA level and a pitch between main barrier ribs of 360 μm, a barrier height of 120 μm, a barrier width of 20 μm and a depth of 50 μm.
By forming two μm stripes, desired characteristics could be obtained.

From the results shown in FIG. 4, if the opening width is about half of the maximum particle diameter of the sandblasted cutting particles,
In the time to complete the cutting of the discharge space, it is possible to cut about half the depth. By making the stripe opening width W 0.5 times or less the maximum particle diameter of the cutting particles, the exhaust performance in the exhaust process is improved. It is possible to prevent erroneous discharge in the adjacent discharge space while securing a width and depth that do not impair.

Further, the stripe formed on the barrier is intended to secure exhaust characteristics. Therefore, it is not necessary that the shape be a straight line, and various shapes such as zigzag are conceivable. It goes without saying that the present invention can be applied to these forming methods.

[0039]

According to the present invention, erroneous discharge with an adjacent discharge space is prevented by a barrier partitioning the adjacent space, and exhaust gas for removing residual impurity gas which causes an increase in discharge voltage can be reliably exhausted in a short time. In addition, a plasma display panel having a grid-like shape in which a stripe-shaped passage is provided in the barrier and a phosphor can be applied to the side surface of the barrier can be obtained reliably and at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic partial sectional perspective view of a plasma display panel of the present invention.

FIG. 2 is a cross-sectional perspective view showing a partition structure according to a conventional example and an embodiment of the present invention.

FIG. 3 is a manufacturing process diagram of a partition wall and a barrier according to the embodiment of the present invention.

FIG. 4 is a diagram showing a relationship between a dry film opening width and a cutting depth according to the embodiment of the present invention.

FIG. 5 is a schematic partial cross-sectional perspective view of a conventional plasma display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 First insulating substrate 2 Dielectric layer 3 Protective film layer 4 Scan electrode 5 Sustain electrode 6 Light shielding layer 7 Second insulating substrate 8 Insulator layer 9 Data electrode 10, 20, 30 Partition wall 11 Phosphor 12 Discharge space 13, 29 barrier 25 glass substrate 26 glass paste 27 dry film 32 sandblasting device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideki Ashida 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 72) Inventor Kazuo Takahashi 1006 Kazuma Kadoma, Kazuma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Yasuyuki 1006 Kazuma Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. No. 1-1, Matsushita Electronics Co., Ltd. F-term (reference) 5C027 AA09 5C040 FA01 GF03 GF19 JA17 MA18 MA20

Claims (3)

[Claims] A step of applying a glass paste, a step of drying the glass paste, a step of forming a dry film resist on the upper surface of the glass paste, a step of patterning the dry film, and a step of sandblasting the dry film. A method for manufacturing a plasma display panel in which a partition is formed by a step of removing a glass paste by a method, when forming a substantially square-shaped discharge space including a main partition and a barrier by sandblasting,
A method for manufacturing a plasma display panel, characterized in that a single or a plurality of openings are provided in a dry film of a crosspiece in one direction to be connected to an adjacent discharge space in a direction of a main partition wall, and sandblasting is performed. 2. The method according to claim 1, wherein the opening width of the opening is 0.5 times or less the maximum particle diameter of the sandblasted particles. 3. A first insulating substrate in which at least a light-shielding layer is arranged between each pair of a plurality of pairs of scan electrodes and sustain electrodes covered with a dielectric layer and a protective film layer; Plasma in which a plurality of covered data electrodes, a plurality of partitions provided on the insulator layer, and at least a second insulating substrate having a phosphor layer disposed between the partitions are opposed to each other across a discharge space. A display panel, wherein a barrier is provided between main barrier ribs on the insulator layer on the second insulating substrate, wherein the barrier faces the light-shielding layer of the first insulating substrate, and A plasma display panel, wherein a slit communicating with an adjacent discharge space is provided.