JPH10308178A - Structure of pdp using wire electrode - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a baking frequency of back glass, and prevent the occurrence of contraction, a warp or strain of the glass by forming a thin metallic wire or a lead frame formed in a stripe shape by etching without forming address electrodes of a three-electrode surface discharge type ACDPD on a glass substrate. SOLUTION: A stripe-shaped second address electrode 2 and a memory (-) electrode 3 making a pair in parallel to it, are arranged on the front glass 1 side, and both are covered with a dielectric layer 4 and a protective layer 5. A stripe-shaped partition wall 6 is formed on back glass 9, and a phosphor 7 is applied to its surface. A first address electrode 8 is a metallic wire-like electrode having a width of about 50 μm to 100 μm. In the other embodiment, it is formed as a structure that a surface of the first address electrode is covered with a phosphor layer. Since the applying area of the phosphor increases, light emitting efficiency and luminance increase. The structurally simplest opposed two-electrode type PDP can also be colored.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a panel structure of a discharge type display device.

[0002]

2. Description of the Related Art The structure of a conventional discharge display device, that is, a so-called plasma display panel (PDP) is roughly divided into XY
There are a DC PDP having a structure in which the metal surfaces of a plurality of electrode groups constituting a matrix are exposed to a discharge space, and an AC PDP having a structure in which the surface of an XY matrix electrode group is covered with an insulating layer. In the AC type, an XY matrix electrode group is arranged on the front glass side and the rear glass side, respectively, and a so-called opposed two-electrode type ACPDP having a structure in which address discharge and memory discharge are performed in opposed spaces, In addition, there is a so-called three-electrode surface-discharge type ACDP in which a memory discharge is performed between one of the XY electrodes and a memory electrode disposed on the same plane in parallel with the XY electrode in addition to the XY electrode.

[0003]

Among the above-mentioned existing technologies, the opposed two-electrode type ACPDP has the simplest electrode configuration and stable operation, but has a problem in colorization. That is, the place where the phosphor is applied is limited. The phosphor has to be applied to the wall surface of the partition wall or the surface surrounding the discharge surface of the electrode in a donut shape, for example, so as not to impair the discharge characteristics and to prevent the phosphor itself from being subjected to ion bombardment. There was a problem from the point of view. What has been devised to solve this problem is a so-called three-electrode surface discharge type ACPDP. This is done by first printing and firing address electrodes on the back substrate side,
A glass layer printed by laminating and printing or solid printing a partition is formed by sandblasting or the like, and a phosphor layer is finally applied on the partition. The problem in such a process is that the rear glass substrate must be fired many times at different temperatures, causing shrinkage, warpage, or distortion of the glass.

[0004]

In order to solve the above-mentioned problem, a first aspect of the present invention relates to a conventional three-electrode surface discharge type AC.
A PDP address electrode is not formed on a glass substrate, but is formed as a thin metal wire or a lead frame etched and formed in a stripe shape. After forming a partition wall and a phosphor screen, it is assembled and formed with the glass substrate. According to a second aspect of the present invention, a phosphor is applied to the address electrode of the metal wire to improve the luminance.

According to a third aspect of the present invention, as a method of colorizing an opposed two-electrode type ACPDP which has been difficult in the prior art as described above, at least the electrode on the side in contact with the phosphor screen on the back side of the two opposite electrodes is used. A thin metal wire similar to the above-mentioned claims 1 and 2 is formed and covered with a dielectric layer and a protective layer.

[0006]

FIG. 1 is an exploded perspective view of a panel for explaining a PDP structure according to a first aspect of the present invention, and FIG. 2 is a sectional view of FIG. First, a stripe-shaped second address electrode 2 is arranged on the front glass 1 side, and a pair is arranged in parallel with the stripe-shaped second address electrode 2. A memory electrode 3 as a common electrode is formed, and these are covered with a dielectric layer 4 and a protective layer 5. On the back glass 9, stripe-shaped partition walls 6 are provided.
Is formed, and the phosphor layer 7 is applied to the surface thereof. The first address electrode 8 has a width of about 50 μm to 100 μm.
It is a metal wire electrode of μm. Since the first address electrode 8 must maintain a proper discharge gap between the first address electrode 8 and the front glass 1, the first address electrode 8 is arranged so as to extend along the groove.

The second address electrode 2 and the memory electrode 3 are formed by screen printing of silver paste or the like, or etching a metal thin film such as copper chromium or a transparent conductive film such as indium tin oxide formed by vapor deposition or the like. The dielectric layer 4 is fired after screen printing of low melting glass.
The protective layer 5 is generally formed by vacuum deposition of magnesium oxide or the like. The partition wall 6 on the back side is overprinted with a low-melting glass paste by a screen printing method to a predetermined height, but a sandblasting method or a photoengraving method is also possible. The phosphor layer 7 can also be easily formed by screen printing. The material metal of the first address electrode 8 is an alloy of iron, nickel, or the like having substantially the same thermal expansion coefficient as glass, for example, 426.
Although what is called an alloy is common, other metals may be used. The first address electrode is wire-shaped,
It can also be formed by etching a metal plate.

Since the operation of the first embodiment shown in FIGS. 1 and 2 is exactly the same as that of a conventional so-called three-electrode surface discharge type PDP, this will be briefly described. First, the first address electrode 8 and the second address electrode 2 form an XY matrix, and when a discharge occurs between the two electrodes in response to an image signal, the dielectric layer 4 covering the second address electrode at the intersection thereof or the like. Wall charges accumulate on the surface of the protective layer 5 that further covers the surface. If addressing is performed by line-sequential scanning from the upper part of the screen during the address period, wall charges can be selectively distributed at each intersection, that is, at a pixel portion. Therefore, when a so-called sustain pulse common to all pixels is applied between the second address electrode and the memory electrode 3 after the application of the address pulse corresponding to the image signal, a difference in the voltage between the electrodes due to the existence or nonexistence of the wall charge. it can. Utilizing this, the selective discharge of the pixel according to the image continues until the next erase pulse is applied. The erase pulse is generally a pulse having a width smaller than that of the sustain pulse, and a method of stopping the discharge by preventing inversion of the wall charge is generally used.

[0009]

[Embodiment 2] FIG. 3 is a sectional view of a panel for explaining a PDP structure according to a second aspect of the present invention. The basic structure is exactly the same as in FIGS. 1 and 2, but here, the surface of the first address electrode 8 is covered with a phosphor layer 10. It goes without saying that the phosphor layers 7 and 10 are phosphors of the same emission color. The phosphor layer can be applied by various methods such as a spray method, an electrodeposition method, and a printing method. This operation is also exactly the same as that of FIGS. Because the phosphor layer 10 itself is an insulator, the phosphor layer 10 does not form an insulating film that affects the discharge when the phosphor layer 10 is applied thinly.
It has no effect on the address discharge. Therefore, the same operation as in the first embodiment is performed.

[0010]

Third Embodiment FIG. 4 is a sectional view of a panel for explaining a PDP structure according to a third aspect of the present invention. Here, the structure is such that the periphery of the first address electrode 8 is covered with the dielectric layer 11 and the protective layer 12 in the same manner as the dielectric layer 4 and the protective layer 5. The dielectric layer 11 can be formed by screen printing or the like, similarly to the dielectric layer 4, but can be easily formed by an electrodeposition method or the like. Comparing the first and second embodiments in terms of structure, FIG. 4 does not include the memory electrode 3. That is, if FIGS. 1, 2 and 3 correspond to the conventional three-electrode surface discharge type, FIG. 4 corresponds to the opposed two-electrode type. That is, wall charges due to the address discharge are formed by opposing charges having different polarities on each side of the intersection of the XY electrodes. Therefore, when the sustain pulse is X
An AC type memory discharge can be performed by applying the voltage to both the Y electrodes.

In the case of this structure, FIG. 5 which is a sectional view of FIG.
As is clear from FIG. 3, since the position of the first address electrode 8 is on the upper surface of the phosphor layer 7, the electric field between the first address electrode 8 and the second address electrode 2 before the discharge causes the phosphor layer 7 to be displaced. Does not cross. This does not basically change even if a cathode drop is formed after the start of discharge. That is, the phosphor layer 7 is not subjected to ion bombardment. That is, there is no problem of ion bombardment of the fluorescent screen, which is a problem in the conventional opposed two-electrode type, and there is no need to use a three-electrode surface discharge type having a more complicated structure. Further, in FIGS. 4 and 5, the second address electrode 2 is formed on the front glass 1, but it is needless to say that the second address electrode 2 can also be formed in a wire shape like the first address electrode 8.

[0012]

According to the PDP having the structure of the first aspect of the present invention, the first address electrode 8 is disposed on the rear glass 9 in comparison with the conventional three-electrode surface discharge type. Since the number of firings of the rear glass 9 is greatly reduced, deformation such as distortion and warpage of the glass can be prevented, and the production yield is improved. Further, according to the PDP having the structure of the second aspect of the present invention, the luminous efficiency and the luminance can be increased by increasing the application area of the phosphor. According to the PDP of the third aspect of the present invention, it is possible to color the opposed two-electrode PDP which is the simplest in structure. Furthermore, an advantage common to the present invention described in each claim is that the electrodes are formed into wires. As a result, the electrodes can be pulled out to the outside and used as electrode terminals, thereby facilitating connection with the circuit.

[0013]

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of Embodiment 1 of the present invention.

FIG. 3 is a sectional view of Embodiment 2 of the present invention.

FIG. 4 is an exploded perspective view of a third embodiment of the present invention.

FIG. 5 is a sectional view of Embodiment 3 of the present invention.

FIG. 6 shows a conventional opposed two-electrode type.

FIG. 7 shows a conventional three-electrode surface discharge type PDP.

[0014]

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front glass 2 Second address electrode 3 Memory electrode 4 Dielectric layer 5 Protective layer 6 Partition wall 7 Phosphor layer 8 First address electrode 9 Back glass 10 Phosphor layer 11 Dielectric layer 12 Protective layer

Claims (3)

[Claims] 1. A groove formed of a plurality of stripe-shaped partitions is formed on a rear glass without forming an electrode, and a phosphor is applied to a wall surface and a bottom surface of the groove. Then, a thin wire-shaped metal electrode that can sufficiently secure a discharge space is arranged as an address electrode, and further, on the front glass facing the rear glass, an XY matrix orthogonal to the address electrode and the partition via the partition wall is provided. A to form
A so-called three-electrode surface discharge type ACPDP having a C-type, that is, a plurality of stripe-shaped electrodes whose electrode surfaces are covered with a dielectric layer and a protective layer, and an AC-type memory discharge electrode parallel to the stripe-shaped electrodes. 2. A groove formed of a plurality of stripe-shaped partitions is formed on the back glass without forming an electrode, and a phosphor is applied to a wall surface and a bottom surface of the groove. Then, a thin wire-shaped metal electrode that can still sufficiently secure a discharge space is arranged as an address electrode, and the surface of the wire-shaped address electrode is covered with a phosphor of the same color as the phosphor applied to the groove, Further, on the front glass facing the rear glass, a plurality of stripe electrodes having an AC type that forms an XY matrix orthogonal to the address electrodes and the partition walls via the partition walls, that is, a plurality of stripe electrodes whose electrode surfaces are covered with a dielectric layer and a protective layer, A so-called three-electrode surface discharge type ACPDP having the same AC type memory discharge electrode in parallel with the striped electrode
Structure. 3. A groove formed of a plurality of stripe-shaped partitions is formed on the back glass without forming an electrode, and a phosphor is applied to a wall surface and a bottom surface of the groove. Then, a thin wire-shaped metal electrode capable of securing a sufficient discharge space is arranged as an address electrode, and the surface of the wire-shaped address electrode is covered with a dielectric layer and a protective layer to form an AC type electrode. On the front glass facing the glass, a plurality of stripe-shaped electrodes were formed on the front glass facing the AC type address electrodes and the XY matrix orthogonal to each other via the partition walls, that is, the electrode surfaces were covered with a dielectric layer and a protective layer. A structure of a so-called opposed two-electrode type ACPDP.