JPH10308177A - Discharge tube for display, and its driving method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge tube for display which is excellent in luminance and high definition and free from any cross talk. SOLUTION: An electrode 5 for display which is formed on a first substrate 1 is commonly used between adjacent cells, and the distance from a first address electrode 6 is increased to obtain the excellent efficiency and excellent luminance. The cross talk is suppressed by providing grid-shaped bulkheads 3, 4 to demarcate adjacent discharge area. Further, the influence of the increase in the discharge voltage by increasing the distance between electrodes for keeping the discharge on the drive circuit is suppressed by improving the drive waveform.

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 pixels by an address operation using plasma discharge and a driving method thereof.

[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. A display electrode covered with an intersecting dielectric layer, a first address electrode, and a second address electrode;
An initial discharge, that is, an address discharge is performed between the address electrodes to charge the surface of the dielectric layer, and then a discharge between the display electrode, the first address electrode and the charged potential of the dielectric layer is used. Display.

A conventional AC PDP will be described with reference to FIGS.

FIG. 7 is a schematic perspective view of a conventional AC type PDP.
FIG. 8 is a schematic sectional view of a conventional AC PDP. In addition,
In FIG. 8, the first substrate is shown rotated by 90 ° with respect to the second substrate 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, 6 is a first address electrode, 6a is a mother electrode, 6b is a transparent electrode, 7 is a second address electrode, 8a is a dielectric layer, 9 is a protective film (MgO), 10 is R, G, B phosphors.

On the back glass substrate 2 constituting the PDP, a plurality of stripe-shaped second address electrodes 7 parallel to each other are formed by a thick film technique such as screen printing or a thin film technique such as vapor deposition or etching. Back glass substrate 2
Stripe-shaped partition walls 3 are formed by screen printing, sandblasting, or the like so as to surround the second address electrodes 7 in parallel with the upper second address electrodes 7.

The phosphors 10 of the three primary colors R, G, and B are separately applied to the inside of the stripe-shaped partition walls 3 by screen printing, sand blasting, or the like.

On a transparent front glass substrate 1 forming a tube in cooperation with the rear glass substrate 2, a plurality of second address electrodes 7 formed on the rear substrate 2 are orthogonally crossed.
A plurality of parallel first address electrodes 6 and display electrodes 5
Are formed.

At the time of display, the second address electrode 7 and the first
An address discharge is performed between the address electrodes 6, and then a display discharge is performed between the first address electrode 6 and the display electrode 5. Ultraviolet light generated from the plasma of the discharge is phosphor 1
Excitation of 0 emits visible light, which is extracted from the front glass substrate 1 as display light.

The first address electrode 6 and the display electrode 5
A dielectric layer 8a is formed thereon by printing or the like, and a protective film (MgO film) 9 is deposited thereon. 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 section comprising a front 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. (AC type memory unit) is provided.

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

In this hybrid type PDP, electrons generated by the discharge between the address electrodes 22 and 23 are drawn out to the memory side by the voltage applied to the perforated metal electrode plate 20, and the electrons are extracted by the transparent insulating layer 18 on the front glass substrate 1 side. Transparent full surface electrode 1 covered
AC type discharge is maintained between the metal electrode 7 and the perforated metal electrode plate 20.

This type of hybrid PDP is intended to simplify the circuit by the self-scanning function and to achieve high 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.
In the C-type PDP, the control of the presence / absence of discharge between the adjacent first address electrode and the display electrode is performed by the difference in the distance between the adjacent pixels and the electrodes. It is difficult to achieve high brightness.

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. Also, when erasing memory discharge, wall charges accumulated on the insulating layer on the transparent 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.

An object of the present invention is to provide a display discharge tube which solves the above-mentioned problems of the conventional PDP, simplifies the structure, and enables high-brightness and high-definition display, and a driving method thereof. It is in.

[0021]

The outline of the configuration of the present invention for achieving the above object will be briefly described as follows.

That is, the display discharge tube according to the present invention has a display electrode and an address electrode pair covered with a dielectric layer, and at least one address electrode is covered with the dielectric layer to provide a display. The electrodes are commonly used in the two discharge spaces by the partition walls. As a result, it is possible to increase the distance between the display electrodes or increase the electrode area, and it is possible to obtain an image display with high efficiency and high luminance.

Hereinafter, the constitutions of the present invention will be enumerated as follows.

(1) A first substrate having a plurality of display electrodes substantially parallel to each other and a plurality of first address electrodes arranged substantially in parallel with the display electrodes, and is disposed to face the first substrate. A second substrate having a plurality of second address electrodes intersecting the display electrode and the first address electrode and being substantially parallel to each other, wherein a second substrate is provided between the first substrate and the second substrate. In a display discharge tube in which a discharge region is formed by enclosing a gas into the display electrode, a dielectric layer covering the display electrode and the first address electrode, and the display electrode, the first address electrode, and the The second address electrode, wherein the display electrode is commonly arranged for pixels adjacent to each other in the direction in which the second address electrode extends, and the display electrode is provided between the first substrate and the second substrate. Parallel to the extending direction of the second address electrode A grid located between adjacent second address electrodes in the direction, and a center located between the adjacent first address electrodes on the display electrode in a direction perpendicular to the extending direction of the second address electrode; Wherein the first address electrode is disposed at a position close to the adjacent partition.

(2) A dielectric layer is provided for covering the second address electrode.

(3) a first substrate having a plurality of display electrodes substantially parallel to each other and a plurality of first address electrodes arranged substantially in parallel with the display electrodes, and facing the first substrate; A second substrate having a plurality of second address electrodes intersecting the display electrode and the first address electrode and being substantially parallel to each other, wherein a second substrate is provided between the first substrate and the second substrate. Forming a discharge region by enclosing a gas therein, and a dielectric layer covering the display electrode and the first address electrode;
One pixel includes the display electrode, the first address electrode, and the second address electrode, and the display electrode is commonly arranged for pixels adjacent to each other in a direction in which the second address electrode extends. In a direction parallel to the extending direction of the second address electrodes, between the first substrate and the second substrate, between the adjacent second address electrodes, and perpendicular to the extending direction of the second address electrodes. In a preferred direction, there is provided a grid-shaped partition located between the first address electrodes adjacent to the center on the display electrode, and the first address electrode is arranged at a position close to the adjacent partition. A wall discharge on the electrode surface of the entire screen is erased by a reset discharge, and then a desired wall charge is formed by a discharge between the first address electrode and the second address electrode. A After performing the addressing, a unipolar pulse is applied to the first address electrode, a reverse polarity pulse is applied to the display electrode in synchronization with the pulse, and the first polarity is applied to a gap between the reverse polarity pulses. A sustain discharge is performed by applying a pulse having the same polarity as the pulse applied to the address electrode and a peak value higher than the pulse.

(4) A first substrate having a plurality of display electrodes substantially parallel to each other, and a plurality of first address electrodes arranged substantially in parallel with the display electrodes; and a first substrate opposed to the first substrate. A second substrate having a plurality of second address electrodes intersecting the display electrode and the first address electrode and being substantially parallel to each other, wherein a second substrate is provided between the first substrate and the second substrate. Forming a discharge region by enclosing a gas therein, and a dielectric layer covering the display electrode and the first address electrode;
One pixel includes the display electrode, the first address electrode, and the second address electrode, and the display electrode is commonly arranged for pixels adjacent to each other in a direction in which the second address electrode extends. In a direction parallel to the extending direction of the second address electrodes, between the first substrate and the second substrate, between the adjacent second address electrodes, and perpendicular to the extending direction of the second address electrodes. In a preferred direction, there is provided a grid-shaped partition located between the first address electrodes adjacent to the center on the display electrode, and the first address electrode is arranged at a position close to the adjacent partition. A wall discharge is uniformly formed on the electrode surface of the entire screen by a reset discharge, and then a desired wall charge is generated by a discharge between the first address electrode and the second address electrode. To erase After performing an address, a unipolar pulse is applied to the first address electrode, a reverse polarity pulse is applied to the display electrode in synchronization with the pulse, and the first polarity is applied to a gap between the reverse polarity pulses. The sustain discharge is performed by applying a pulse having the same polarity as the pulse applied to one address electrode and a peak value higher than the pulse.

(5) A first substrate having a plurality of display electrodes substantially parallel to each other, and a plurality of first address electrodes arranged substantially in parallel with the display electrodes; and a first substrate facing the first substrate. A second substrate having a plurality of second address electrodes intersecting the display electrode and the first address electrode and being substantially parallel to each other, wherein a second substrate is provided between the first substrate and the second substrate. Forming a discharge region by enclosing a gas therein, a dielectric layer covering the display electrode and the first address electrode, a dielectric layer covering the second address electrode, and the display electrode in one pixel. And the first address electrode and the second address electrode. The display electrode is commonly arranged for pixels adjacent in the direction in which the second address electrode extends, and the first substrate and the first Of the second address electrode between the two substrates In the direction parallel to the extending direction, between adjacent second address electrodes, and in the direction perpendicular to the extending direction of the second address electrodes, the first address electrodes at the center and adjacent to each other on the display electrode. A grid-shaped partition wall located between the first and second address electrodes, wherein the first address electrode is disposed at a position close to the partition wall adjacent to the first address electrode, wherein the reset discharge causes a discharge on the electrode surface of the entire screen. After erasing the wall charges, applying an address by forming a desired wall charge by discharging between the first address electrode and the second address electrode, and then applying a unipolar pulse to the first address electrode. A pulse of the opposite polarity is applied to the display electrode in synchronization with the pulse, and a pulse having the same polarity as the pulse applied to the first address electrode and higher than the pulse applied to the gap between the pulses of the opposite polarity. And performing a sustain discharge by applying a pulse value.

(6) A first substrate having a plurality of display electrodes substantially parallel to each other, and a plurality of first address electrodes arranged substantially in parallel with the display electrodes, and is arranged to face the first substrate. A second substrate having a plurality of second address electrodes intersecting the display electrode and the first address electrode and being substantially parallel to each other, wherein a second substrate is provided between the first substrate and the second substrate. Forming a discharge region by enclosing a gas therein, and a dielectric layer covering the display electrode and the first address electrode;
A dielectric layer covering the second address electrode; and a display electrode, the first address electrode, and the second address electrode in one pixel, wherein the display electrode extends from the second address electrode. Pixels are arranged in common for pixels adjacent in the direction, and between the second address electrodes adjacent to each other in a direction parallel to the extending direction of the second address electrodes between the first substrate and the second substrate. A grid-like partition wall located between the first address electrodes adjacent to the center on the display electrode in a direction perpendicular to the extending direction of the second address electrodes, wherein the first address electrodes are A method for driving a display discharge tube arranged in a position close to an adjacent partition wall, wherein after uniformly forming wall charges on the electrode surface of the entire screen by reset discharge, the first address electrode and the second address are driven. Between the electrodes After performing an address by erasing a desired wall charge by applying a voltage, a unipolar pulse is applied to the first address electrode, and a reverse polarity pulse is applied to the display electrode in synchronization with the pulse. A sustain discharge is performed by applying a pulse having the same polarity as the pulse applied to the first address electrode and a peak value higher than the pulse applied to the first address electrode in a gap between the pulses of the opposite polarity.

According to the display discharge tube of the present invention having the above structure, the distance between the electrodes for the sustain discharge can be increased, so that the luminous efficiency can be improved, the luminance can be greatly increased, and It is possible to obtain a high-quality image display with high definition and no crosstalk.

Further, according to the driving method of the present invention having the above-described structure, it is possible to suppress the influence on the drive circuit of the increase in the discharge voltage of the sustain discharge caused by increasing the distance between the electrodes.

[0032]

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

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

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 a mixture of (Ne), argon (Ar), and xenon (Xe) is sealed. As a structure housed in the tube, a display electrode 5 and a first address electrode 6 are formed on the front glass substrate 1 by a thin film process or a thick film process such as printing.

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

The dielectric 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.
B deposition) or the like.

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, and is adjacent to a direction parallel to the extending direction of the second address electrode 7. The second address electrodes 7 are located between the center of the display electrodes 5 in a direction perpendicular to the extending direction of the second address electrodes 7 and between the adjacent first address electrodes 6. As described above, the grid-like partition walls 3 are formed by screen printing, sand blasting, or the like. The phosphors 10 of the three primary colors R, G, and B are formed by printing or the like.

FIG. 3 is a sectional view similar to FIG. 2 illustrating the schematic structure of a second 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 address electrodes 7 by printing or the like, the grid-like partition walls 3b are formed.
And the phosphor 10 is formed. Other configurations are the same as those of the first embodiment shown in FIG.

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, also simply referred to as a cell), a display electrode 5, a second address electrode 7, and a first address electrode 6 are arranged.

Such a display discharge tube is manufactured as follows.

FIG. 4 is a process chart for explaining the outline of the manufacturing process of the display discharge tube according to the present invention.

First, transparent electrodes 5b and 6b are formed on the front glass substrate 1 as display electrodes 5 and first address electrodes 6.
Is patterned with, for example, an ITO film. For example, Cr-Cu-C is formed as a mother electrode 5a at the center of the transparent electrode 5b, and a mother electrode 6a at an end opposite to the display electrode 5 on the transparent electrode 6b.
An r film is formed by a thin film process. Here, the reason why the transparent electrode is used is to increase the electrode area and improve the transmittance to achieve higher luminance.

In order to simplify the manufacturing process or to produce an ultra-high-efficiency display discharge tube, only the mother electrode may be used without forming a transparent electrode. The material of the mother electrodes 5a and 6a only needs to have a small electric resistance.
A metal such as Ni or a multilayer film such as Cr-Au-Cr may be used.

After forming the above-mentioned electrodes, a dielectric layer 8a made of transparent glass or the like is formed on the entire surface so as to cover the electrodes,
A grid-shaped partition wall 4 is formed such that one of the four sides is located substantially at the center of the display electrode 5 such that one side is located substantially at the center of the adjacent first address electrodes, and a protective film is formed thereon. M as 9
A gO film is formed. The lattice-shaped partition walls 4 are made of black glass or the like, and when laminated by printing, it is preferable that at least the first layer be black in order to improve the contrast.

Next, a second address electrode 7 is formed on the rear glass substrate 2 by printing or a thin film process, and thereafter, a white dielectric 8b is formed on the entire surface by printing or the like.
It should be noted that there is no significant difference in basic functions even if the white dielectric is not formed as shown in FIG.

Next, in the direction parallel to the direction in which the second address electrodes 7 extend, substantially the center of the adjacent second address electrodes 7, and in the direction perpendicular to the direction in which the second address electrodes 7 extend, the display is performed. The grid-like partition walls 3 are formed by screen printing, sand blasting, or the like so as to be located substantially at the center on the electrode 5 for use and at the approximate center of the adjacent first address electrodes 6, respectively. Note that the grid-like partition 4 on the front glass substrate 1 is not always necessary. In that case, when the grid-like partition 3 on the rear glass substrate 2 is laminated by screen printing, the final laminated layer is preferably black.

Thereafter, each of the phosphors 10 of the three primary colors R, G, B
Is formed on the second address electrodes 7 and on the wall surfaces of the lattice-shaped partition walls 3 by a method such as printing.

The second address electrode 7 is made of Ag, Al, Ni,
Metal such as Au or Cr-Cu-Cr, Cr-Au-
It is preferable to use a multilayer film of Cr or the like. Further, the white dielectric 8b and the grid-like partition 3 are formed of an insulating material such as white glass. The reason why the white insulating material is used is to efficiently reflect the light emitted from the phosphor 10 toward the front glass substrate.

Thereafter, the front glass substrate 1 and the rear glass substrate 2 are sealed with frit glass or the like, and after the evacuation step, the above-mentioned gas is sealed. The manufacturing process of the display discharge tube having the structure of the present invention is basically the same as that of the conventional AC discharge tube.

Hereinafter, embodiments of the display discharge tube according to the present invention will be described with specific numbers.

Front glass substrate 1 and rear glass substrate 2
Is 2.0 mm thick soda glass, and the display cell pitch is 0.33 mm × 1.0 mm. The thickness of the glass substrate basically has vacuum strength, and is not particularly limited as long as there is no problem in handling. Further, if a high strain point glass is used as a glass material, it is even better than soda glass.

On the front glass substrate 1, a display electrode 5 is formed in a pattern of 0.6 mm in width and a first address electrode 6 is formed in a pattern of an ITO film which is a transparent electrode to a width of 0.24 mm. Is formed by a thin film process with an electrode width of 0.06 mm.

By using the transparent electrodes 5b and 6b and the mother electrodes 5a and 6a for the display electrode 5 and the first address electrode 6,
A reduction in light transmittance and an increase in wiring resistance can be suppressed, and the electrode area can be increased.

After the electrodes are formed, a transparent dielectric layer 8a having a thickness of 0.02 mm is uniformly formed on these electrodes over the entire surface, and a grid-like partition wall 4 is formed thereon with a width of 0.06 mm and a height of 0.01 m.
m, the glass is formed of black glass so as to substantially overlap the grid-like partition 3 on the rear glass substrate 2. Thereafter, MgO is formed as a protective film 9 to a thickness of about 600 nm by EB evaporation.

In the present embodiment, the gap between the front glass substrate 1 and the rear glass substrate 2 determined by the height of the partition 4 and the partition 3 was 0.16 mm.

The portion of the partition wall 4 perpendicular to the direction in which the second address electrode 7 extends is the transparent electrode 5b of the display electrode.
When formed on the mother electrode 5a formed thereon, a decrease in transmittance can be suppressed, and the displayed image becomes brighter.

A substantially lattice-shaped partition wall 3 formed on the rear glass substrate 2 and a substantially lattice-shaped partition wall 4 formed on the front glass substrate 1
Are arranged so that the four sides overlap. At this time, the first address electrode 6 is arranged close to the adjacent partition.

Here, the display electrode 5 and the first
Although an example in which a transparent electrode is used for the address electrode 6 has been described, a transparent electrode may not be used for each of the display electrode 5 and the first address electrode 6. In the case of using only the mother electrode without using the transparent electrode, for example, the electrode width is set to 0.2 mm for the display electrode 5 and 0.1 mm for the first address electrode 6.
In this case, the discharge sustaining voltage increases, but the luminous efficiency can be increased.

In the above description, the ITO film is used as the transparent electrode. However, if the electrode area can be secured without lowering the transmittance, there is no problem. Needless to say, a Nesa film or the like can be used.

On the rear glass substrate 2, a second address electrode 7 is formed with a width of 0.10 mm using Ag, Al, Ni or the like by a printing method or a photo process. On this electrode, a white dielectric layer 8b is uniformly formed with a thickness of 0.015 mm.

Incidentally, the electrode width of the second address electrode 7 is approximately 0.05 to 0.2 when the discharge cell pitch is 0.33 mm.
mm. If the electrode width becomes narrow, the discharge starting voltage becomes high or time is required.
Below, high-speed address discharge is difficult. White dielectric 8b
There is no significant difference in basic functions whether or not they are formed. The formation of the white dielectric 8b improves the utilization of the reflected light from the phosphor 10, and also serves as a protective film for the second address electrode 7 when the grid-like partition 3 is formed by using sandblasting.

In this embodiment, the width of the grid-like partition 3 is 0.0.
The height was 6 mm and the height was 0.15 mm. This grid-like partition 3
Has a width of approximately 0.02 to 0.1 mm and a height of 0.05 to
0.20 mm, formed by printing or sandblasting.

If the width of the grid-like partition 3 is 0.1 mm or more, the aperture ratio becomes low, which is disadvantageous for obtaining high luminance. The smaller the width of the grid-like partition 3 is, the better.
If it is 2 mm or less, it is difficult to form a partition having a sufficient height.

If the height of the grid-like partition walls 3 is less than 0.05 mm, a sufficient amount of the phosphor cannot be applied. Formation becomes difficult.

The phosphor 10 is formed on the rear glass substrate 2 by applying a paste-like phosphor by printing or the like so as to correspond to each of the RGB colors.

Thus, the front glass substrate 1 and the rear glass substrate 2 are manufactured. The thus obtained front glass substrate 1, rear glass substrate 2, and exhaust pipe (not shown) are sealed with frit glass, then evacuated, filled with a sealing gas, and chip-off. The sealing gas is an ionizable gas such as He-Xe, Ne-Xe, etc., and approximately 400 t at 25 ° C.
It is sealed at a pressure of about orr.

It should be noted that there is no significant difference in the basic function of the present invention between the types of gas to be sealed.

As described above, since the display electrodes are commonly used in the adjacent cells, and the first address electrodes are arranged in the positions close to the adjacent partition walls, the display electrodes which generate the sustain discharge are generated. 5 and first address electrode 6
The distance between them can be made large (0.4 mm in this embodiment), and a highly efficient and high-brightness display discharge tube can be manufactured.

Further, by partitioning each cell by grid-like partition walls, it is possible to suppress the occurrence of so-called crosstalk in which a sustain discharge, which is a concern when the display electrode is commonly used in adjacent cells, spreads regardless of the address. .

(Embodiment 1 of Driving Method) FIG. 5 is a conventional driving waveform diagram for clearly explaining the driving method of the display discharge tube of this embodiment.

FIG. 6 is a drive waveform diagram for explaining a method of driving the display discharge tube of this embodiment.

Hereinafter, a first embodiment of the driving method of the display discharge tube of the present embodiment will be described with reference to FIG. 6 and FIG.

First, one frame includes an entire writing period,
It is divided into an address period and a sustain discharge period.
In the entire writing period, first, the first address electrode 6
1, 62, 63 to 6n are set to the ground level, the write pulse 11 consisting of the voltage Vw is applied to the display electrode 5, and discharge is performed in all cells of all display lines. continue,
The potentials of the first address electrodes 61, 62, 63 to 6n are returned to the voltage Vs, and the sustain discharge pulse 12 is applied to the display electrode 5, so that the sustain discharge is performed in all cells, and wall charges are formed in all cells. Is done.

Next, in the address period, writing is performed as follows. First, a ground-level address pulse 13 is applied to the first address electrode 61, and cells in the second address electrode that are not subjected to sustain discharge are
That is, the address pulse 14 of the voltage Va is selectively applied to the second address electrode corresponding to the cell not to be turned on,
The self-erasing discharge of the cell which is not turned on is performed, and the wall charge is erased. That is, this means that the address of one line has been negatively written.

Thereafter, data is written in the subsequent display lines by the same operation.

Thereafter, a sustain discharge period is started.
In the general driving method of the electrode surface discharge type AC-PDP, as shown in FIG. 5, when the sustain discharge period is reached, the sustain discharge pulse 1 is alternately applied to the first address electrode 6 and the display electrode 5.
5 and 16 are applied, sustain discharge is performed, and image display of one frame is performed.

On the other hand, in the present embodiment, the discharge voltage is increased because the distance between the display electrode 5 causing the sustain discharge and the first address electrode 6 is increased. Therefore, as shown in FIG. 6, a pulse 15 of the same polarity as that of the related art is applied to the first address electrode 6, and a pulse 18 of the opposite polarity is applied to the display electrode 5 in synchronization with the same. By applying a pulse 17 having the same polarity as the pulse applied to the first address electrode 6 and having a higher peak value to the gap between the pulses, sustain discharge is performed.

As a result, a higher sustaining voltage is applied between the display electrode 5 and the first address electrode 6 than in the prior art.

As described above, according to the driving method of the present embodiment, the increase in the sustain discharge voltage due to the increase in the inter-electrode distance of the sustain discharge is reduced by the first address electrode 6 which requires a circuit having the number of scan lines. Can be dealt with by the pulse applied to the display electrode 5 side while keeping the peak value of the pulse applied to the same level as that of the conventional three-electrode surface discharge type AC-PDP. A display tube with high brightness and high efficiency can be easily realized.

Further, the structure in which the display electrode is commonly used in the adjacent cells is employed, and the distance between the display electrode and the first address electrode is increased by disposing the first address electrode close to the adjacent partition. This works to reduce the electric capacity and reduces the load on the driving circuit for sustain discharge.

In the above, a so-called negative address mode in which an address discharge is selectively caused in a cell not to be displayed has been described. Conversely, a so-called positive address mode in which an address discharge is selectively caused in a cell to be displayed is described. The driving method of the present embodiment can be similarly applied to the type address mode. That is, by applying a narrow pulse during the entire writing period of the above-described embodiment to erase the wall charges on the entire surface, and then scanning the first address electrode to which the address pulse having a wider pulse width than the negative type is applied, according to the data. An address pulse having a pulse width wider than that of the negative type is applied to the second address electrode to generate an address discharge in a cell to be displayed to form a wall charge, and then maintained between the first address electrode 6 and the display electrode 5. Cause discharge. The pulses applied to the first address electrode 6 and the display electrode 5 to generate the sustain discharge are basically the same as those in the above embodiment.

Although the basic driving method of the display discharge tube of the present invention has been described above, the driving method of the present invention is not limited to the above. The present invention is characterized in that in a display discharge tube having a high discharge voltage for sustain discharge, it is possible to drive the drive circuit on the first address electrode side while maintaining the same withstand voltage. It is not limited to the above-described type and structure of the discharge tube for display.

[0085]

As described above, according to the present invention,
The structure in which the display electrode is commonly used in the adjacent cells and the arrangement of the first address electrode in the vicinity of the adjacent partition wall make it possible to reduce the sustain discharge compared with the conventional three-electrode surface discharge type AC-PDP. It is possible to increase the distance between the electrodes,
This increases the luminous efficiency. In addition, the conventional surface discharge type A
As compared with C-PDP, the electrode area of the discharge cell can be increased, and the luminance can be greatly increased.

Further, even if the discharge cells are arranged at a high-definition pitch, a decrease in efficiency and a decrease in luminance due to miniaturization of the electrode-to-electrode distance and electrode area can be suppressed as compared with the conventional AC-PDP, and a high-definition image with high luminance can be obtained. When a thin film process can be used for display, an insulating layer formed on a display electrode or an address electrode can be almost completely flattened, so that a grid-like partition formed on these can be flattened, and irregularity of the partition can be achieved. Can provide a PDP with further reduced crosstalk.

Further, according to the driving method of the present invention,
The increase in the sustain discharge voltage due to the increase in the inter-electrode distance of the sustain discharge is determined by changing the peak value of the pulse applied to the first address electrode side, which requires a circuit corresponding to the number of scan lines, to the conventional value of 3
Since it is possible to cope with the pulse applied to the display electrode side while maintaining the same level as the electrode surface discharge type AC-PDP, it is possible to reduce the load on the drive circuit and easily produce a high-luminance and high-efficiency display discharge tube. Can be realized.

[Brief description of the drawings]

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

FIG. 4 is a process diagram illustrating an outline of a manufacturing process of a display discharge tube according to the present invention.

FIG. 5 is a conventional driving waveform diagram for clearly explaining an embodiment of a driving method of a display discharge tube according to the present invention.

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

FIG. 7 is a schematic perspective view of a conventional AC type display discharge tube.

FIG. 8 is a schematic sectional view of a conventional AC type display discharge tube.

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Front glass plate which is 1st substrate 2 Rear glass plate which is 2nd substrate 3, 4 Lattice-shaped partition wall 5 Display electrode 5a Mother electrode 5b Transparent electrode 6 First address electrode 6a Mother electrode 6b Transparent electrode 7 Second Address electrode 8 Dielectric layer 8a Transparent dielectric layer 8b White dielectric layer 9 Protective film 10 Phosphor 11 Write pulse 12 Sustain discharge pulse 13 Address pulse applied to first address electrode 14 Address applied to second address electrode Pulse 15 Sustain discharge pulse applied to first address electrode 16 Sustain discharge pulse applied to conventional display electrode 17, 18 Sustain discharge pulse applied to display electrode of the present invention.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akio Yamaguchi 3300 Hayano, Mobara-shi, Chiba Pref.Electronic Devices Division, Hitachi, Ltd. (72) Inventor Akira Shintani 3681-Hayano, Mobara-shi, Chiba Pref. 72) Inventor Kawa-Saki ▼ 3681 Hayano Mobara-shi, Chiba Hitachi Device Engineering Co., Ltd.

Claims (6)

[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. Intersects the display electrode and the first address electrode,
A display substrate including a second substrate having a plurality of second address electrodes substantially parallel to each other, and forming a discharge region by filling a gas between the first substrate and the second substrate. A dielectric layer that covers the display electrode and the first address electrode, and the display electrode, the first address electrode, and the second address electrode in one pixel; Pixels adjacent to each other in the direction in which the second address electrode extends are commonly arranged, and adjacent in the direction parallel to the direction in which the second address electrode extends between the first substrate and the second substrate. A grid-like partition wall is provided between the second address electrodes in the direction perpendicular to the direction in which the second address electrodes extend, and is located at the center of the display electrode and between the adjacent first address electrodes. The first address electrode is adjacent to the first address electrode. Display discharge tube, characterized in that arranged in a position close to the barrier rib. 2. The display discharge tube according to claim 1, further comprising a dielectric layer covering said second address electrode. 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. Intersects the display electrode and the first address electrode,
A second substrate having a plurality of second address electrodes substantially parallel to each other, forming a discharge region by filling gas between the first substrate and the second substrate; And a dielectric layer covering the first address electrode; and a display electrode, the first address electrode, and the second address electrode in one pixel, wherein the display electrode is formed of the second address electrode. Second address electrodes adjacent to each other in the direction in which the second address electrodes extend are arranged in common in the direction parallel to the direction in which the second address electrodes extend, between the first substrate and the second substrate. A grid-shaped partition wall located between the first address electrodes adjacent to the center on the display electrode in a direction perpendicular to the extending direction of the second address electrode; The electrode was close to the adjacent partition A method of driving a display discharge tube arranged in a position, wherein after a wall charge on the electrode surface of the entire screen is erased by a reset discharge, a desired discharge is performed by a discharge between the first address electrode and the second address electrode. After performing addressing by forming wall charges, a unipolar pulse is applied to the first address electrode, and a reverse polarity pulse is applied to the display electrode in synchronization with the pulse, and the reverse polarity pulse is applied. A driving method of a display discharge tube, wherein a sustain discharge is performed by applying a pulse having the same polarity as the pulse applied to the first address electrode and a peak value higher than the pulse applied to the gap between the pulses. 4. A first substrate having a plurality of display electrodes substantially parallel to each other, and a plurality of first address electrodes disposed substantially parallel to the display electrodes, and a first substrate opposed to the first substrate. Intersects the display electrode and the first address electrode,
A second substrate having a plurality of second address electrodes substantially parallel to each other, forming a discharge region by filling gas between the first substrate and the second substrate; And a dielectric layer covering the first address electrode; and a display electrode, the first address electrode, and the second address electrode in one pixel, wherein the display electrode is formed of the second address electrode. Second address electrodes adjacent to each other in the direction in which the second address electrodes extend are arranged in common in the direction parallel to the direction in which the second address electrodes extend, between the first substrate and the second substrate. A grid-shaped partition wall located between the first address electrodes adjacent to the center on the display electrode in a direction perpendicular to the extending direction of the second address electrode; The electrode was close to the adjacent partition A method of driving a display discharge tube arranged in a position, wherein after a wall discharge is uniformly formed on the electrode surface of the entire screen by a reset discharge, a discharge between the first address electrode and the second address electrode is performed. After an address is erased by erasing a desired wall charge, a unipolar pulse is applied to the first address electrode, and a reverse polarity pulse is applied to the display electrode in synchronization with the pulse, and the reverse is applied. A driving method of a display discharge tube, characterized in that a sustain discharge is performed by applying a pulse having the same polarity as the pulse applied to the first address electrode and a peak value higher than the pulse applied to the gap between the polar pulses. 5. 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 disposed opposite to the first substrate. Intersects the display electrode and the first address electrode,
A second substrate having a plurality of second address electrodes substantially parallel to each other, forming a discharge region by filling gas between the first substrate and the second substrate; And a dielectric layer covering the first address electrode, a dielectric layer covering the second address electrode, and the display electrode, the first address electrode, and the second address electrode in one pixel. The display electrode is commonly arranged for pixels adjacent to each other in the direction in which the second address electrode extends, and the display electrode extends in the direction in which the second address electrode extends between the first substrate and the second substrate. A position between the adjacent second address electrodes in a parallel direction, and a position between the center and adjacent first address electrodes on the display electrode in a direction perpendicular to the extending direction of the second address electrodes. A grid-like partition wall, A driving method of a display discharge tube in which a non-electrode is disposed at a position close to the adjacent partition wall, wherein a wall charge on an electrode surface of an entire screen is erased by reset discharge, and the first address electrode and the second address electrode are erased. After performing an address by forming a desired wall charge by discharging between the address electrodes, a unipolar pulse is applied to the first address electrode, and a reverse polarity is applied to the display electrode in synchronization with the pulse. And applying a pulse having the same polarity as the pulse applied to the first address electrode and a peak value higher than the pulse applied to the gap between the pulses of the opposite polarity and performing a sustain discharge. Method of driving the discharge tube. 6. A first substrate having a plurality of display electrodes substantially parallel to each other, a plurality of first address electrodes arranged substantially parallel to the display electrodes, and a first substrate opposed to the first substrate. Intersects the display electrode and the first address electrode,
A second substrate having a plurality of second address electrodes substantially parallel to each other, forming a discharge region by filling gas between the first substrate and the second substrate; And a dielectric layer covering the first address electrode, a dielectric layer covering the second address electrode, and the display electrode, the first address electrode, and the second address electrode in one pixel. The display electrode is commonly arranged for pixels adjacent to each other in the direction in which the second address electrode extends, and the display electrode extends in the direction in which the second address electrode extends between the first substrate and the second substrate. A position between the adjacent second address electrodes in a parallel direction, and a position between the center and adjacent first address electrodes on the display electrode in a direction perpendicular to the extending direction of the second address electrodes. A grid-like partition wall, A driving method of a display discharge tube in which a non-electrode is disposed at a position close to the adjacent partition wall, wherein after forming wall charges uniformly on the electrode surface of the entire screen by reset discharge, the first address electrode and the After performing an address by erasing a desired wall charge by discharging between the second address electrodes, a unipolar pulse is applied to the first address electrode, and the display electrode is synchronized with the pulse. A sustain discharge is performed by applying a pulse of the opposite polarity and applying a pulse having the same polarity as the pulse applied to the first address electrode and a peak value higher than the pulse applied to the gap between the pulses of the opposite polarity. To drive the display discharge tube.