JPH10308176A - Discharge tube for display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separate a distance of a display electrode and increase the electrode area by using the display electrode in common in two discharge spaces by a partition wall as well as to restrain voltage for a display low and display an image with high luminance and high efficiency by changing electrode width in its extending direction. SOLUTION: A lattice-shaped partition wall 4 is formed on a display electrode 5 composed of a base electrode 5a and a transparent electrode 5b, and a first address electrode 6 composed of a base electrode 6a and a transparent electrode 6b widens width in a central part of this partition wall 4, that is, a part orthogonal to a second address electrode 7. In a place where this width is not wide, a width of the display electrode 5 is widened, and an electrode interval is narrowed. The two sides of a stripe-shaped partition wall 3 formed on a back glass substrate 2 and the lattice-shaped partition wall 4 formed on a transparent front glass substrate 1 being a first substrate, are arranged so as to overlap with each other. A voltage increase by separating a distance between discharge electrodes can be restrained low by changing an electrode width.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display discharge tube, and more particularly to a display discharge tube for selecting a pixel by an address operation using plasma discharge.

[0002]

2. Description of the Related Art A display discharge tube for selecting a pixel by an address operation using plasma discharge, a so-called plasma display panel (hereinafter also referred to as a PDP) is a direct current (DC) type.
Type) and AC type (AC type), or a hybrid type obtained by combining these types. In particular, the AC-type PDP has a memory function utilizing wall charges, and is provided on the opposing inner surfaces of a first substrate which is a front plate made of a glass substrate or the like and a second substrate which is a back plate made of a glass substrate or the like. It has a first electrode (display electrode) and a second electrode (address electrode) covered with intersecting dielectric layers, and performs an initial discharge, that is, an address discharge, between the address electrode and the display electrode to perform dielectric discharge. An electric charge is charged on the surface of the body layer, and thereafter, display is performed by discharging between display electrodes using the charged potential of the dielectric layer.

A conventional PDP will be described with reference to FIGS.

FIG. 7 is a schematic perspective view of a conventional AC PDP, and FIG. 8 is a schematic cross-sectional view of the conventional AC PDP. In FIG. 8, the first substrate is shown rotated by 90 ° with respect to the second substrate in order to facilitate understanding of the structure.

In FIGS. 7 and 8, reference numeral 1 denotes a transparent front glass substrate which is a first substrate, 2 denotes a rear glass substrate which is a second substrate, 3 denotes a partition, 5 denotes a display electrode (memory electrode),
5a is a mother electrode, 5b is a transparent electrode, 70 is an address electrode,
8a is a dielectric layer, 9 is a protective film (MgO), 10 is R,
G and B phosphors.

On the back glass substrate 2 constituting the PDP, a plurality of parallel stripe-like address electrodes 7 are provided.
0 is formed by a thick film technique such as screen printing or a thin film technique such as vapor deposition or etching, and a stripe-shaped partition wall 3 is formed so as to surround the address electrodes 70 in parallel with the address electrodes 70 on the rear glass substrate 2. It is formed by printing, sandblasting, or the like.

Note that phosphors 10 of three primary colors of R, G, and B are separately applied to each color by a screen printing method or the like inside the stripe-shaped partition wall 3.

On the transparent front glass substrate 1 forming a tube in cooperation with the rear glass substrate 2, a plurality of parallel electrodes are provided so as to be orthogonal to the plurality of address electrodes 70 formed on the rear glass substrate 2. Display electrode 5 is formed. Note that one display cell has two display electrodes 5.

At the time of display, the address electrode 70 and one display electrode 5 in one display cell (hereinafter also referred to as one cell) are used.
, An address discharge is performed, and then a display discharge is performed between the two display electrodes 5. The display electrode 5 is a so-called memory electrode. Ultraviolet rays are emitted by the plasma of the discharge of the display electrode, and the ultraviolet rays excite the phosphor 10 and are extracted from the front glass substrate 1 as display light.

The dielectric layer 8a is formed on the display electrode 5.
Is formed by printing or the like, and a protective film (MgO
Film 9 is deposited. Further, a discharge gas is sealed in the inside of the tube constituted by the front glass substrate 1 and the rear glass substrate 2.

FIG. 9 shows a hybrid type PD according to the prior art.
It is sectional drawing which shows P.

Referring to FIG. 1, a plurality of orthogonal address electrodes 22 and 23 having a self-scanning function by direct current discharge (DC discharge) are provided on the rear glass substrate 2 side. A semi-AC type memory comprising a transparent full-surface electrode 17 provided on the front glass substrate 1 side where a discharge space is coupled between the address electrodes 22 and 23 and a perforated metal plate 20 having a plurality of through holes opposed thereto. Unit (semi-AC type memory unit) is provided.

An insulating substrate 24 is disposed in each gap between the plurality of address electrodes 22, and the entire surface of the transparent electrode 17 is covered with a transparent insulating layer 18, between the perforated metal plate 20 and the transparent insulating layer 18. Partitions 19 and 21 are provided between the perforated metal plate 20 and the insulating substrate 24, respectively, and are sealed in a tube composed of the rear glass substrate 2 and the front glass substrate 1 having a discharge gas therein.

In this hybrid type PDP, electrons generated by a discharge between the address electrodes 22 and 23 are transferred to the perforated metal plate 2.
The AC type discharge is maintained between the transparent full-surface electrode 17 covered with the transparent insulating layer 18 on the front glass substrate 1 side and the perforated metal plate 20 by drawing out to the memory side with the voltage given to 0.

This type of hybrid type PDP is designed to simplify the circuit by the self-scanning function and to increase the brightness by the memory function.

The above PDP is disclosed in Japanese Patent Publication No. 3-7646.
No. 8 discloses this.

[0017]

The conventional A shown in FIG.
Since the C-type PDP controls the presence / absence of discharge between adjacent display electrodes based on the difference in distance, higher brightness is achieved by increasing the resolution and separating the electrodes (by widening the electrode width, etc.). Cannot cope with

On the other hand, the conventional hybrid type PDP shown in FIG. 9 has a complicated structure, which makes mass production difficult, and has the following problems. That is, in order for this PDP to operate reliably, the diameter of the hole for connecting the discharge space on the address side and the memory side must be increased to strengthen the connection between the two discharge spaces. If the diameter is too large, there is a contradiction that the separation between the two discharge spaces becomes uncertain. When erasing memory discharge, wall charges accumulated on the insulating layer on the transparent front surface electrode on the front glass substrate side must be erased. It becomes difficult to control wall charges by the address electrodes. Further, when the diameter of the hole is large, there is a problem that stable addressing and self-scanning function are impaired due to the influence of memory discharge.

The perforated metal plate separating the address side and the display side of the PDP may have a metal layer formed on an insulator without using a metal plate, even if a part of the metal plate is covered with an insulating layer. However, since it is an essential requirement for operation that the metal electrode is exposed, high-precision structural separation is required for insulation from the DC scanning unit and stable operation.
This makes production more difficult. In addition, half AC
Because of the mold operation, the wall charges contributing to the memory are accumulated only on one side of the address side, so that there is a problem that the memory function is weak and the discharge sustaining voltage is high.

It is an object of the present invention to provide a display discharge tube which solves the above-mentioned problems of the conventional PDP, simplifies the configuration, and enables high-brightness and high-definition display.

[0021]

In order to achieve the above-mentioned object, a display discharge tube according to the present invention has a display electrode pair and an address electrode pair covered with a dielectric layer, and has at least one at least one electrode pair. An address electrode is covered with a dielectric layer, and a display electrode is commonly used in two discharge spaces by partition walls. Thus, the distance between the display electrodes can be increased, and the electrode area can be increased.

In the display discharge tube according to the present invention, the width of the address electrode in the extending direction is not constant, or the width of the display electrode in the extending direction is not constant, that is, the electrode width is reduced in the extending direction. The voltage for display can be suppressed low, and a high-luminance and high-efficiency image display can be obtained.

That is, a first invention according to claim 1 is a first invention comprising a plurality of display electrodes substantially parallel to each other and a plurality of first address electrodes arranged substantially parallel to the display electrodes. A second substrate having a plurality of second address electrodes disposed in opposition to the first substrate, intersecting the display electrode and the first address electrodes, and being substantially parallel to each other; In a display discharge tube in which a gas is sealed between a substrate and the second substrate to form a discharge region, the display tube has a dielectric layer covering the display electrode, and the display electrode has a thickness of 1%.
Along with at least one pair of electrodes in the cell,
A four-electrode structure having the first address electrode covered with a dielectric layer on the same substrate as the electrode pair of the display electrode, wherein the first address electrode is arranged between the electrode pair of the display electrode Wherein the electrode width of the first address electrode on the same substrate as the electrode pair of the display electrode is formed non-uniformly in the extending direction of the address electrode.

According to a second aspect of the present invention, the electrode width of the first address electrode on the same substrate as the display electrode in the first aspect intersects with the second address electrode. It is characterized in that it is formed wide at the part.

Further, a third aspect of the present invention provides a third aspect of the present invention,
A first substrate having a plurality of display electrodes substantially parallel to each other, and a plurality of first address electrodes arranged substantially parallel to the display electrodes; and a display electrode arranged to face the first substrate. And a second substrate having a plurality of second address electrodes crossing the first address electrodes and substantially parallel to each other,
A display discharge tube in which a discharge region is formed by filling a gas between the first substrate and the second substrate, the display tube having a dielectric layer covering the display electrode, wherein the display electrode has a thickness of 1%. The cell includes at least one pair of electrodes, the first address electrode covered with a dielectric layer on the same substrate as the electrode pair of the display electrode, and the first address electrode is used for the display. 4 arranged between electrode pairs of electrodes
An electrode structure is formed, and the electrode width of the display electrode is formed to be non-uniform in the extending direction of the display electrode.

The fourth invention according to claim 4 is as follows:
A third aspect of the present invention is characterized in that the display electrode is formed so that the electrode width of the display electrode has a portion that intersects with the second address electrode and has a narrower portion than the portion that does not intersect.

According to the present invention having the above structure, the distance between the discharge electrodes can be increased, so that the luminous efficiency is improved,
Brightness can be greatly increased.

Also, by changing the width of the address electrode without changing the width of the address electrode, the voltage for display can be suppressed low, and a high-definition, high-brightness image display with high quality can be obtained. Can be.

[0029]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

(Embodiment 1 of Display Discharge Tube) FIG. 1 is an exploded perspective view for explaining a schematic structure of an embodiment of a display discharge tube according to the present invention, and FIG. 2 is a perspective view of the display discharge tube shown in FIG. It is sectional drawing explaining a schematic structure.

In FIG. 2, in order to facilitate understanding of the structure, the first substrate is 90 ° with respect to the second substrate.
It is rotated and displayed.

This display discharge tube is used as a first substrate,
For example, using a transparent glass substrate, the front glass substrate 1
And Further, as the second substrate, for example, a transparent glass substrate is used, which is referred to as a back glass substrate 2.

The periphery of the front glass substrate 1 and the rear glass substrate 2 is sealed with frit glass, and the following structure is housed in a sealed tube, and the tube is evacuated. Helium (He), neon (
A discharge gas (gas) such as Ne), argon (Ar), xenon (Xe), or a mixture thereof is sealed therein.

As a structure housed in the tube, a second address electrode 7 is formed on the rear glass substrate 2 by a thin film process or a thick film process such as printing.
Stripe-shaped partition walls 3 are formed by screen printing, sand blasting, or the like so as to surround address electrodes 7.
Each of the phosphors 10 of the three primary colors RGB is also formed on the second address electrode 7 on the wall surface of the stripe-shaped partition wall 3 by printing or the like.

On the front glass substrate 1, a display electrode pair 5 and a first address electrode 6 are formed by a thin film process or the like. The display electrode 5 includes a transparent electrode 5b and a bus line (bus) 5a having an electrical resistance different from that of the transparent electrode 5b.
The first address electrode 6 includes a transparent electrode 6b and a bus line (bus) 6a having a different electrical resistance from the transparent electrode 6b.

A second address electrode 7 is formed on the rear glass substrate 2 so as to be orthogonal to the first address electrode 6. The electrode width of the first address electrode 6 is different from that of the second address electrode 7. Increase the overlap.

FIG. 3 is a sectional view similar to FIG. 2 illustrating a schematic structure of a modification of the embodiment of the display discharge tube according to the present invention.

As shown in FIG. 3, after forming a white dielectric layer 8b on the second address electrode 7 by printing or the like, the stripe-shaped partition walls 3 and the phosphor 10 may be formed. Other configurations are the same as those in FIG.

On the electrode pairs 5M1 and 5M2 of the display electrode 5 and the first address electrode 6, a dielectric layer 8a and a protective film 9 are formed.

The dielectric layer 8a is an insulator made of transparent glass or the like, is formed by printing or the like, and the protective film 9 is an oxide such as MgO having a high secondary electron emissivity, and is formed by vapor deposition or the like. .

1 is formed in a discharge region defined by the partition 4 on the front glass substrate 1 side and the partition 3 on the rear glass substrate 2.
In one display cell (hereinafter, simply referred to as a cell), two electrode pairs 5M1 and 5M2 of the display electrode 5, the second address electrode 7, and the first address electrode 6 are arranged.

By separating the address electrode and the display electrode, the display electrode can use the electrode 5M1 and the electrode 5M2, which form an electrode pair, in the adjacent discharge region. For example, by forming the partition wall 4 on 5M1 and 5M2, a discharge space (discharge area)
Can be separated.

FIG. 4 is a plan view of a display pixel on a front glass substrate of a display discharge tube according to the present invention, and FIG. 5 is an explanatory diagram of an electrode pattern on the front glass substrate.

In each figure, reference numeral 7A denotes a center line of the second address electrode 7.

A grid-like partition 4 is formed on the display electrodes 5 (5M1, 5M2), and the first address electrode 6 has a width at the center of the partition 4, that is, at a portion orthogonal to the second address electrode 7. Wide. Where the electrode width of the first address electrode 6 is not wide, the width of the display electrode 5 is widened to narrow the electrode interval.

The display electrode 5 (5M1, 5M2) comprises a transparent electrode 5b and a mother electrode 5a having a different electric resistance from the transparent electrode 5b.

Hereinafter, specific numerical examples of the display discharge tube according to the present invention will be described.

Front glass substrate 1 and rear glass substrate 2
As, using a soda glass plate thickness of 2.0mm,
The cell pitch of the display cells is 0.33 mm × 1.0 mm.

The thickness of these glass substrates is basically not limited to the above-mentioned numerical value unless it has a vacuum resistance and there is no problem in handling, and there is no particular limitation. Further, as a material of the glass, a glass with a high strain point is more desirable than a soda glass, but it is not limited to this.

On the front glass substrate 1, first address electrodes 6 are formed with a maximum width of 0.3 mm and a minimum width of 0.05 mm. The transparent electrode 6b constituting the first address electrode 6 is formed of a plurality of island-shaped patterns having a width of 0.3 mm and a length of 0.2 mm from an ITO film, and the mother electrode 6b is formed of Cr so as to communicate the patterns. -Formed with Cu-Cr to a width of 0.05 mm.

In FIG. 4, the transparent electrode 6b has a rectangular island pattern. However, the transparent electrode 6b may be connected to an adjacent transparent electrode. The electrode pattern is not limited to a rectangle, but may be an ellipse or the like. The first address electrode 6 may have an electrode width that is wide where an address discharge occurs, and may be an electrode width that does not hinder the display electrode in other places.

On the other hand, the display electrode 5 is composed of a transparent electrode 5b and a mother electrode 5a. An ITO film is used as the transparent electrode 5b, and Cr-Cu-Cr is used as the mother electrode 5a. The width of the display electrode 5 is approximately 0.6 mm, which is the minimum width when the first address electrode 6 is the maximum width, and 0.85 m, which is the maximum width when the first address electrode 6 is the minimum width.
m. The mother electrode 5a is formed at the center of the transparent electrode 5b.

The bus 5a of the display electrode 5 and the bus 6a of the first address electrode 6 are formed at the center of the transparent electrodes 5b and 6b, respectively. These buses are present on the respective transparent electrodes. It is only necessary to form them at the center of the transparent electrodes 5b and 6b as described above.

In this case, the buses 5a and 6a have Cr-
Although Cu—Cr is used, a metal such as Ag or a multilayer film such as Cr—Au—Cr may be used as long as the electrical resistance of the transparent electrode is reduced.

The transparent electrodes 5b and 6b are not limited to ITO as long as they are transparent electrodes. For example, a Nesa film may be used.

When the display cell pitch is 1.0 mm, the first
The width of the address electrode 6 is approximately 0.5 to 0.1 mm at the maximum width.
And the minimum width is 0.1 to 0.03 mm. If the width of the first address electrode 6 exceeds 0.5 mm, the electrode area of the display electrode 5 that forms a display pixel together with the first address electrode 6 is undesirably reduced. On the other hand, if the maximum width is less than 0.1 mm, the electrode area for the address discharge is reduced, the discharge voltage is increased, and the time required for reliable discharge is increased, which is not preferable.

On the other hand, if the minimum width is less than 0.03 mm, the resistance value does not decrease, which is not preferable.

After the display electrodes 5 and the first address electrodes 6 are formed, a transparent dielectric layer 8a is formed on the electrodes to cover the electrodes.
A substantially grid-shaped partition wall is formed so as to have a thickness of 020 mm and is uniformly formed on the entire surface, so that two of the four sides overlap a bus bar 5a formed on the transparent electrode 5b of the electrode pair 5M1, 5M2 of the display electrode 5. 4 is formed. The height of the partition 4 is 0.03 mm when the filling gas is 400 torr.

The partition 4 is not limited to a lattice shape, but is preferably formed in a substantially lattice shape in order to prevent optical crosstalk of light emission of adjacent discharge cells.

The position where the partition 4 is formed depends on the position of the display electrode 5.
There is no problem in the image display function on the transparent electrode 5b, but when formed on the mother electrode 5a, the light transmittance is higher and a bright display image is obtained.

When the partition walls 4 are formed by a printing method or the like, it is desirable that the first layer, that is, the upper layer is printed in black and the lower layer is printed in white.

The stripe-shaped barrier ribs 3 formed on the back glass substrate 2 and the substantially lattice-shaped barrier ribs 4 formed on the front glass substrate 1 are arranged so as to overlap two sides.

After the formation of the grid-like partition 4, an MgO film is formed to a thickness of 500 to 800 nm as the protective film 9 by using a method such as electron beam evaporation (EB evaporation).

A second address electrode 7 is formed on the rear glass substrate 2 by forming a film of Ag, Ni, Cr—Cu—Cr or the like with an electrode width of 0.15 mm by a printing method or a photo process.

On this second address electrode 7, a white dielectric layer 8b is uniformly formed with a thickness of 0.015 mm.

When the discharge cell pitch is 0.33 mm, the electrode width of the second address electrode 7 is approximately 0.05 to 0.05.
0.2 mm. When the electrode width is reduced, the discharge starting voltage is increased, or it takes time until a predetermined discharge state occurs. Therefore, if the electrode width is less than 0.05 mm, the address discharge becomes difficult.

Although there is no significant difference in basic functions even if the white dielectric layer 8b is not formed, the use of the reflected light of the phosphor 10 can be improved by forming the white dielectric layer 8b. When the stripe-shaped barrier ribs 3 are formed by using sandblasting, they serve to protect the second address electrodes 7.

The width of the stripe-shaped partition 3 is 0.06 m.
m and its height is 0.15 mm. In addition, this partition 3
Has a width of approximately 0.02 to 0.1 mm and a height of 0.0
It is formed in the range of 5 to 0.20 mm by the above sandblasting or printing method.

If the width of the stripe-shaped partition wall 3 exceeds 0.1 mm, the aperture ratio becomes poor, and it is not possible to secure sufficient brightness and discharge space. The smaller the width of the stripe-shaped partition wall 3 is, the better it is. However, if it is less than 0.02 mm, a partition wall having a sufficient height cannot be formed.

The height of the stripe-shaped partition walls 3 is 0.05 m.
If it is less than m, a sufficient amount of phosphor cannot be applied, and if the height exceeds 0.2 mm, it is difficult to form partition walls.

The phosphor 10 is formed on the rear glass substrate 2 by applying a paste-like phosphor material by a printing method or the like.
Red (R), green (G), and blue (B) are separately applied.

In this way, the front glass substrate 1 and the rear glass substrate 2 are manufactured, and the obtained front glass substrate 1, the rear glass substrate 2, and an exhaust pipe (not shown) are sealed with frit glass. Evacuate, fill gas and tip off. The gas to be sealed is an ionizable gas such as He-Xe or Ne-Xe, and is approximately 400 t at 25 ° C.
It is sealed at a pressure of about orr.

It should be noted that the type of gas to be sealed does not greatly affect the basic function of the present invention.

In the above description, the partition formed on the rear glass substrate 2 has been described as the stripe-shaped partition 3, but a grid-shaped partition may be formed on the rear glass substrate 2. In this case, a white glass material is used for the lower layer of the lattice-shaped partition walls, and a black glass material is used for the uppermost layer.

In this case, the phosphor 10 is formed inside a lattice-shaped partition wall, and is formed into a macroscopic stripe. Up to the transparent dielectric layer 8a is formed on the front glass substrate 1, and the grid-like partition walls 4 are not formed on the front glass substrate 1,
It goes without saying that this may be formed. afterwards,
An MgO film 9 is formed as a protective film and sealed with the back glass 2.

In the above embodiment, the configuration in which the display electrode 5 is commonly used in adjacent cells has been described. However, there is no problem even if the display electrode 5 is separated for each cell. Also, the first
Although the address electrode 6 has been described as being formed with one island pattern in one cell, a configuration in which a plurality of island patterns are present in one cell may be adopted.

Next, a method of driving the display discharge tube of the above embodiment will be described.

FIG. 6 is a driving waveform diagram for explaining an example of the driving method of the display discharge tube according to the present invention. The voltage in the example was 400 tons of Ne-6% Xe as the sealing gas.
It is a value when sealed in rr.

First, in order to make all the discharge cells on the screen of the display discharge tube uniform, that is, the electric charges on the electrodes 5M1 and 5M2 and the first address electrode 6 constituting the electrode pair of the display electrode 5 are set. Is discharged between the electrodes 5M1 and 5M2 to erase the wall charges on the surface of the dielectric layer 8a.

That is, during the reset period shown in FIG.
A pulse of Pwsa is applied to M1 and a pulse of Pwsk is applied to 5M2. Since this pulse is intended to prevent wall charges from being applied, it is a narrow pulse.

In general, in a so-called AC type discharge tube for discharge, wall charges are not generated when the pulse width is short during discharge, and wall charges are generated when the pulse width is wide.

In this embodiment, the pulse width of Pwsa and Pwsk is 1 μs, the voltage of Pwsa is +40 V,
Pwsk is -240V.

After this discharge (that is, after the entire reset), the waveforms during the address period in FIG. 6 are changed to the first address electrodes 6 (6-1, 6-2,..., 6-n) and the first address electrodes 7 (7-n), voltage is applied to the electrodes 5M1 and 5M2 of the display common electrode.

In a discharge cell to be addressed, a negative pulse Pc is applied to the first address electrode 6 and a positive pulse Pa is applied to the second address electrode 7 with a potential difference causing discharge. At this time, a voltage + Vm higher than the potential of the discharge space generated by the address discharge is applied to one side of the electrode of the display common electrode 5, for example, 5M1, within a range where the first address electrode 6 on the low voltage side does not cause a discharge. The other electrode 5M2 has a voltage -Vm lower than the potential of the discharge space generated by the address discharge within a range in which no discharge occurs with the second address electrode 7 on the high voltage side.
Is applied.

The pulses applied to these address electrodes are pulses (Pc, Pa) having a short pulse width such that no wall charges are generated on the address electrodes to cause an address discharge, and the space charges after the address discharge are reduced. Wall charges having opposite characteristics are accumulated in the electrodes 5M1 and 5M2 of the display electrode 5, respectively.

The pulse width of the pulse Pc and the pulse Pa is 1 μs, the voltage of the pulse Pc is −120 V, the pulse Pa is +40 V, + Vm is +30 V, and −Vm is −30 V.

In the sustain period, the sustaining pulse Ps is applied to the electrodes 5M1 and 5M2 constituting the display electrodes in the sustain period of FIG. 6, and the address discharge occurs, that is, the cell having the wall charge in the display common electrode is generated. A cell that has been discharged and has not generated an address discharge, that is, a cell having no wall charge in the display common electrode does not discharge.

Note that Ps has a pulse width of 4 μs and a voltage of −
At 220 V, wall discharge is formed in the cell where discharge has occurred.

As described above, the sustaining of the discharge during the sustain period can be controlled according to the presence or absence of the address discharge (image information).

[0090]

As described above, according to the present invention,
The rise in voltage due to increasing the distance between the discharge electrodes can be suppressed low by changing the electrode width, and
By separating the electrodes, the luminance can be greatly improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a schematic structure of an embodiment of a display discharge tube according to the present invention.

FIG. 2 is a cross-sectional view illustrating a schematic structure of the display discharge tube shown in FIG.

FIG. 3 is a sectional view similar to FIG. 2, illustrating a schematic structure of a modification of the first embodiment of the display discharge tube according to the present invention.

FIG. 4 is a plan view of a display pixel on a front glass substrate of a display discharge tube according to the present invention.

FIG. 5 is an explanatory diagram of an electrode pattern on a front glass substrate of a display discharge tube according to the present invention.

FIG. 6 is a driving waveform diagram for explaining an example of a driving method of a display discharge tube according to the present invention.

FIG. 7 is a schematic perspective view of an AC type PDP according to the related art.

FIG. 8 is a schematic cross-sectional view of an AC type PDP according to the related art.

FIG. 9 is a cross-sectional view showing a hybrid type PDP according to the related art.

[Explanation of symbols]

 Reference Signs List 1 transparent front glass substrate as first substrate 2 rear glass substrate as second substrate 3 partition 4 partition 5 display electrode (memory electrode) 5a mother electrode 5b transparent electrode 6 first address electrode 6a mother electrode 6b transparent Electrode 7 Second address electrode 8a Dielectric layer 8b White dielectric layer 9 Protective film (MgO) 10 R, G, B phosphor.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiroshi Kawasaki 3681 Hayano Mobara-shi, Chiba Hitachi Device Engineering Co., Ltd. (72) Inventor Akira Shinya 3681 Hayano Mobara-shi Chiba Prefecture Hitachi Device Engineering Co., Ltd. (72) Inventor Norio Nakamura 3300 Hayano Mobara-shi, Chiba Hitachi, Ltd.

Claims (4)

[Claims] A first substrate having a plurality of display electrodes substantially parallel to each other and a plurality of first address electrodes arranged substantially parallel to the display electrodes; and a first substrate opposed to the first substrate. A second substrate having a plurality of second address electrodes crossing the display electrode and the first address electrode and being substantially parallel to each other, wherein a gas is interposed between the first substrate and the second substrate. A display discharge tube in which a discharge region is formed by enclosing a display region, wherein the display electrode has a dielectric layer covering the display electrode, and the display electrode is constituted by at least one pair of electrodes in one cell; The first address electrode covered with a dielectric layer on the same substrate as the electrode pair of the first electrode;
An address electrode forms a four-electrode structure in which the electrode pair is arranged between the electrode pair of the display electrodes, and the electrode width of the first address electrode on the same substrate as the electrode pair of the display electrode is equal to that of the address electrode. A display discharge tube formed non-uniformly in an extending direction. 2. The method according to claim 1, wherein the electrode width of the first address electrode on the same substrate as the display electrode is formed wider at a portion intersecting with the second address electrode. The display discharge tube according to the above description. 3. A first substrate having a plurality of display electrodes substantially parallel to each other, a plurality of first address electrodes disposed substantially parallel to the display electrodes, and a first substrate opposed to the first substrate. A second substrate having a plurality of second address electrodes crossing the display electrode and the first address electrode and being substantially parallel to each other, wherein a gas is interposed between the first substrate and the second substrate. A display discharge tube in which a discharge region is formed by enclosing a display region, wherein the display electrode has a dielectric layer covering the display electrode, and the display electrode is constituted by at least one pair of electrodes in one cell; The first address electrode covered with a dielectric layer on the same substrate as the electrode pair of the first electrode;
An address electrode constitutes a four-electrode structure in which the electrode is disposed between the electrode pair of the display electrodes, and the electrode width of the display electrode is formed non-uniformly in the extending direction of the display electrode. Characteristic discharge tube for display. 4. The display electrode according to claim 3, wherein an electrode width of the display electrode is formed so as to have a portion that intersects with the second address electrode and is narrower than a portion that does not intersect with the second address electrode. Discharge tube for display.