JPH04255638A - Plasma display panel - Google Patents

Abstract

PURPOSE:To prevent the serious damage of a dielectric layer due to electric discharge, and ensure the long lifetime thereof by erecting a part of display discharge electrodes up to the predetermined height in a direction approximately orthogonal with a substrate surface, and using the side of the electrode as a discharge section. CONSTITUTION:Maintenance electrodes 14 mainly composed of Ag and select electrodes 15 are formed as a unit in order of 14, 15 and 14 parallel to one another and in such a direction as vertical to a write electrode 13. The aforesaid electrodes 14 and 15 are covered with a dielectric layer 17 mainly composed of low-fusion point glass. Then, opposite phase pulse voltage lower than discharge start voltage but higher than maintenance voltage, is applied to a gap between arbitrary electrodes 14 and 15. Also, the electrode 13 is applied with pulse voltage of such a phase as opposite to the electrode 15 at a level higher than discharge start voltage between the electrodes 13 and 15, thereby causing discharge to take place. Thereafter, the aforesaid discharge is shifted and used as a source of discharge between the electrodes 14 and 15. As a result, display discharge takes place, and the serious damage of the dielectric layer 17 due to discharge concentration on adjacent electrode edges can be prevented, thereby ensuring long electrode lifetime and enabling a cell or the like to be compact.

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 its electrode structure.

0002

2. Description of the Related Art A conventional AC surface discharge type color plasma display panel has writing electrodes 33 parallel to each other on a front glass substrate 31, as shown in FIG.
It is formed of a transparent electrode such as TO, NESA, etc. or a mesh-like metal electrode, and is covered with a dielectric layer 35.
Phosphors 37 are coated for each discharge cell size. Further, on the rear glass substrate 32, a pair of sustain electrodes 34 are formed parallel to each other in a direction perpendicular to the write electrode 33, and are covered with a dielectric layer 36 to maintain a discharge space.
and a partition wall 38 that serves as a separator between each cell,
It is formed between every pair of sustain electrodes 34, and a front glass substrate 31 and a rear glass substrate 32 are combined, and a dischargeable rare gas is sealed inside.

Such an AC surface discharge type color plasma display panel has a structure in which the phosphors 37 are excited using ultraviolet rays generated by the discharge between the two sustain electrodes 34.

0004

[Problems to be Solved by the Invention] In this conventional AC surface discharge type color plasma display panel, discharge for display is obtained between a pair of sustain electrodes 34 arranged side by side on a plane. Since the discharge concentrates on the adjacent edges of the pair of sustain electrodes 34, the dielectric layer 37 is seriously damaged by sputtering caused by the discharge, resulting in a short service life. Furthermore, since each cell requires two sustain electrodes 34 arranged side by side on a plane, it is difficult to reduce the discharge cells and cell pitch beyond a certain level.

[0005]

[Means for Solving the Problems] The AC surface discharge type color plasma display panel of the present invention includes one or more first electrode groups covered with a dielectric layer on a first substrate, and a second electrode group coated with a dielectric layer on a first substrate. Two or more second electrode groups arranged perpendicularly to the first electrode group and covered with a dielectric layer are provided thereon, and the second substrate and the first substrate are connected to each other. In a plasma display panel that is airtightly sealed so as to face each other with a gap necessary for discharge and filled with a rare gas capable of discharging, some of the electrodes of the second electrode group are placed on the substrate surface. The electrode portion is made to stand up to a predetermined thickness in a direction substantially perpendicular to
It has a structure that serves as a spacer for maintaining a gap necessary for discharge between the substrate and the second substrate, and also as a partition wall as a separator between discharge cells.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

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

A writing electrode 13 made of a NESA electrode known as a transparent conductive film is provided on the front glass substrate 11.
are formed parallel to each other and covered with a dielectric layer 16 mainly composed of low melting point lead glass. On the rear glass substrate 12, a sustain electrode 14 and a selection electrode 15 mainly composed of Ag are arranged.
A dielectric layer 17 which is formed as a set of "sustain electrode 14 - selection electrode 15 - sustain electrode 14" in parallel with each other and perpendicular to the write electrode 13, and whose main component is low melting point lead glass.
covered with. At this time, the selection electrode 15 has a thickness of 50 to several hundred μm by changing printing conditions from that of the sustaining electrode 14.
It is formed to a certain thickness. A partition wall 19 mainly made of alumina is formed on the dielectric layer 17 at a distance between the two sustain electrodes 14 so as to have a thickness comparable to that of the selection electrode 15 . Further, a phosphor 18 is formed on the front glass substrate 11.

[0009] The write electrode 13 is formed by CVD method,
The phosphor 18 is formed by photolithography using a photo paste containing a photosensitive binder. In addition, the electrodes 14 and 15, the dielectric layers 16 and 17, and the partition walls 19 are all formed by a thick film screen printing method.

[0010] Front glass substrate 11 and rear glass substrate 12
is a selection electrode 15 covered with a dielectric layer 17 and a partition wall 1
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 select 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, a display discharge occurs in the discharge path shown in FIG. 1, and ultraviolet light is generated, which excites the phosphor 18 to emit light.

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

In FIG. 2, "sustain electrode 14 - selection electrode 15 -
By forming a set of "sustain electrode 14 - selection electrode 15" instead of "sustain electrode 14" as one set, partition walls are omitted and costs are reduced. A discharge occurs in a space formed by two sustain electrodes and a write electrode 13 as one pixel, and a lighting display is performed.

[0014]

Effects of the Invention As explained above, the present invention allows some of the display discharge electrodes of an AC surface discharge type plasma display panel to stand up 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 spatter caused by the discharge, resulting in an AC surface discharge type collar that has a longer lifespan than conventional ones. A plasma display panel was obtained.

[0015] Furthermore, the structure is such that the raised electrode part serves as a spacer for maintaining the gap necessary for discharge between the front substrate and the rear substrate, and also as a partition wall as a separator between the discharge cells. And the cell pitch could be made smaller than before.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of Example 1 of the present invention.

FIG. 2 is a sectional view of Example 2 of the present invention.

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

[Explanation of symbols]

11, 31 Front glass substrate 12, 32 Rear glass substrate 13, 33 Write electrode 14, 34 Sustain electrode 15 Selection electrode 16, 17, 35, 36 Dielectric layer 18, 37
Phosphors 19, 38 Partition wall

Claims (1)

[Claims] Claim 1: One or more first electrodes covered with a dielectric layer are provided on a first substrate, and two or more second electrodes covered with a dielectric layer are provided on a second substrate. an electrode group, the first substrate and the second substrate are opposed to each other so that the electrodes on both substrates are perpendicular to each other, and the gap necessary for discharge is maintained, and the inside is hermetically sealed. In a plasma display panel filled with a rare gas capable of discharging, 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 discharging. 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 partition wall as a separator between discharge cells. A plasma display panel characterized by having a structure that also serves as.