JPH04255637A - Plasma display panel - Google Patents

Abstract

PURPOSE:To enable the sputter of a dielectric layer to be prevented without causing the concentration of electric discharge on an electrode edge by causing discharge to take place between the side of a maintenance electrode and a select electrode. CONSTITUTION:A write electrode 13 covered with a dielectric layer 16 is laid on a rear glass substrate 12. Select electrodes 15 and maintenance electrodes 14 erected up to the predetermined thickness in a direction orthogonal with the surface of the substrate 12 are provided on the aforesaid dielectric layer 16. Furthermore, a division 19 coated with phosphor 18 is provided between the two select electrodes 15. Electric discharge is caused to take place between the sides of the maintenance electrodes 14 and the select electrode 15, thereby making the phosphor 18 luminous for display.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC surface discharge type color plasma display panel, and more particularly to the structure of electrodes and phosphor portions thereof.

0002

2. Description of the Related Art In a conventional AC surface discharge type color plasma display panel of this type, as shown in FIG. A sustain electrode 34 is provided thereon orthogonally to the write electrode 33.
, selection electrodes 35 are alternately formed parallel to each other, covered with a dielectric layer 37, and for each pair of sustain electrodes 34 and selection electrodes 35, a partition wall 39 is provided which maintains a discharge space and serves as a separator between each cell. is formed between the selection electrode 35 and the sustain electrode 34. Further, on the front glass substrate 31, a phosphor 38 of one discharge cell size is coated.

Such an AC surface discharge type color plasma display panel has a structure in which the phosphor 38 is excited using ultraviolet rays generated by discharge between the sustain electrode 34 and the selection electrode 35.

0004

In this conventional AC surface discharge type color plasma display panel, discharge for display is carried out by sustain electrodes 34 arranged side by side on a plane,
Since the discharge was obtained between the selection electrode 35 and the sustain electrode 34,
There is a problem in that the dielectric layer 37 is seriously damaged by sputtering caused by the discharge due to concentration on adjacent edges between the selection electrodes 35, resulting in a short life span. Furthermore, since each cell requires two electrodes, the sustain electrode 34 and the selection electrode 35, which are arranged side by side on a plane, it is difficult to reduce the discharge cells and the cell pitch beyond a certain level. Furthermore, because the light transmitted through the phosphor is used for display, there are problems such as reduced brightness or uneven brightness if the thickness of the phosphor is uneven.

[0005]

[Means for Solving the Problems] The present invention includes a first electrode group coated with a dielectric layer on a first substrate, and a first electrode group on the dielectric layer. two or more second electrodes arranged perpendicularly to each other and covered with a dielectric layer, and the second substrate and the first substrate facing each other with a gap necessary for discharge. In a plasma display panel that is hermetically sealed and has a rare gas that can be discharged inside, some of the electrodes of the second electrode group are raised to a predetermined thickness in a direction substantially perpendicular to the substrate surface. , the side surface part is used as a discharge part, and the raised electrode part serves as a spacer for maintaining a gap necessary for discharge between the first substrate and the second substrate, and a spacer between the discharge cells. It is characterized by having a structure in which a phosphor is formed in the partition part to serve as at least a part of the partition wall as a separator and to obtain light emission for display.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings. FIG. 1 is a sectional view showing a first embodiment of the present invention. On the rear glass substrate 12, write electrodes 13 mainly composed of Ag are formed in parallel to each other and covered with a dielectric layer 16 mainly composed of low melting point lead glass. A sustain electrode 14 and a selection electrode 15 mainly composed of Ag are provided on the dielectric layer 16.
A dielectric layer 1 consisting of a set of "selection electrode 15 - sustain electrode 14 - selection electrode 15" is formed parallel to each other and perpendicular to the write electrode 13, and is mainly composed of low melting point lead glass.
7. At this time, the sustain electrode 14 is formed to have a thickness of about 50 to several hundred μm by changing printing conditions from those of the selection electrode 15. A partition wall 19 mainly made of alumina is formed on the dielectric layer 17 between the two selection electrodes 15 to have a thickness comparable to that of the sustain electrode 14, and a phosphor 18 is formed on both sides of the partition wall 19. It is formed. Phosphor 18
is formed by photolithography using a photopaste containing a photosensitive binder. In addition, electrode 1
3, 14, 15, dielectric layers 16, 17, and partition walls 19 are all formed by thick film screen printing.

[0007] Front glass substrate 11 and rear glass substrate 12
The sustain electrode 14 and the partition wall 1 covered with the dielectric layer 17 are
9, and the periphery thereof is hermetically sealed with low melting point frit glass or the like, and a dischargeable rare gas such as "He+Xe+Ne" is sealed inside.

In the plasma display panel thus obtained, a pulse voltage of opposite phase, which is lower than the discharge start voltage and higher than the sustain voltage, is applied between the arbitrary sustain electrodes 14 and the selection electrodes 15. Here, a pulse voltage having a phase opposite to that of the selection electrode 15 is applied to the write electrode 13 so as to be higher than the discharge starting voltage between the write electrode 13 and the selection electrode 15 to generate a discharge, and this is used as a pilot discharge. Sustain electrode 14
-By shifting the discharge to between the selection electrodes 15, the space consisting of the sustain electrodes 14, the partition walls 19, and the write electrodes 13 is reduced to one
A lighting display can be performed as a pixel. That is, Figure 1
A display discharge occurs in the discharge path shown in FIG. 1, and ultraviolet rays are generated to excite the phosphor 18 and emit light.

In this embodiment, the sustain electrode is raised to a predetermined thickness in a direction perpendicular to the substrate surface, and discharge is caused between the side surface of the sustain electrode and the selection electrode, so that the discharge occurs between the sustain electrode and the selection electrode. Sputtering of the dielectric layer due to concentration at the edges can be prevented, and a long-life plasma display panel can be obtained.

FIG. 2 is a sectional view showing a second embodiment of the present invention. In this embodiment, "select electrode 25 - sustain electrode 24
- Selection electrode 25'' is not set as one set, but ``sustaining electrode 24-selection electrode 25'' is set as one set, thereby omitting partition walls and reducing costs.

The phosphor 28 is formed on one side surface of the sustain electrode 24 covered with the dielectric layer 27 with an insulating layer 29 interposed therebetween. The insulator layer 29 is connected to the phosphor 28 and the sustain electrode 24.
By forming an appropriate thickness between the selection electrode 25 and the surface of the sustain electrode 24 on which the phosphor 28 is formed, the discharge starting voltage between the selection electrode 25 and the surface of the sustain electrode 24 on which the phosphor 28 is formed can be controlled. It can be set sufficiently higher than the discharge starting voltage between the sustain electrode 24 and the surface on the side where the phosphor 28 is not provided.

As a result, the selection electrode 25 and the sustain electrode 2
It becomes possible to obtain a display discharge without causing a discharge between the surface of the phosphor 28 and the surface on which the phosphor 28 of No. 4 is formed, and damage to the phosphor 28 due to sputtering of the discharge can be suppressed. Note that the insulator layer is also formed by a thick film screen printing method. Discharge occurs through two sustain electrodes and write electrode 2.
A space consisting of 3 pixels is generated as one pixel, and a lighting display is performed.

[0013]

As explained above, the present invention provides a method for raising some of the display discharge electrodes of an AC surface discharge type plasma display panel to a predetermined thickness in a direction substantially perpendicular to the substrate surface. By using the side surface as the discharge part, the discharge concentrates on the adjacent edges between the electrodes, preventing the dielectric layer from being seriously damaged by sputtering caused by the discharge, resulting in a longer life than the conventional AC surface discharge type. A color plasma display panel was obtained.

[0014] Furthermore, the raised electrode portion includes a spacer for maintaining a gap necessary for discharge between the front glass substrate and the rear glass substrate, and at least a part of the partition wall as a separator between the discharge cells. By adopting a dual-purpose structure, the discharge cells and cell pitch could be made smaller than ever before.

Furthermore, by forming the phosphor on the partition wall,
Display light can be obtained as direct light rather than transmitted light from the phosphor, resulting in higher brightness than before and no uneven brightness.
A C-plane discharge type color plasma display panel was obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the invention.

FIG. 3 is a sectional view of a conventional AC surface discharge type color plasma display panel.

[Explanation of symbols]

11, 21, 31 front glass substrate 12, 22,
32 Rear glass substrate 13, 23, 33
Write electrodes 14, 24, 34 Sustain electrodes 15, 25, 35 Selection electrodes 16, 17, 26, 27, 36, 37 Dielectric layers 18, 28, 38 Phosphors 19, 39 Partition walls 29 Insulator layer

Claims (1)

[Claims] 1. One or more first electrode groups covered with a dielectric layer on a first substrate, and arranged on the dielectric layer so as to be orthogonal to the first electrode group. A second electrode group of two or more electrodes covered with a dielectric layer is provided, and the second substrate and the first substrate are faced to each other with a gap necessary for discharge and hermetically sealed. In a plasma display panel filled with a dischargeable rare gas, some of the electrodes of the second electrode group are raised to a predetermined thickness in a direction substantially perpendicular to the substrate surface, and the side surfaces thereof are used as discharge parts. , and the raised electrode portion includes a spacer for maintaining a gap necessary for discharge between the first substrate and the second substrate, and at least a portion of a partition wall serving as a separator between discharge cells. What is claimed is: 1. A plasma display panel characterized in that the plasma display panel has a structure that also serves as a display panel, and a phosphor for obtaining light emission for display is formed in the partition wall portion.