JP3437596B2 - Plasma display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC matrix
The present invention relates to a plasma display device. [0002] 2. Description of the Related Art Plasma display panels (PDPs)
At the intersection of the matrix electrodes associated with the rare gas plasma discharge
This is a display device using the light emission of the display device. Its basic
The structure consists of two glass substrates with row and column electrodes
Ne is mainly used in the formed discharge space (space of about 0.1 mm)
Mixed rare gas is sealed at several hundred Torr. And
PDP is a DC type (direct discharge) with electrodes exposed to the discharge space.
Type) and AC type (indirect discharge type) with electrodes covered with a dielectric layer
Are roughly divided into Driving AC type plasma display device
In the method, refresh method, matrix address
And a self-shift system. [0003] The basic of the conventional matrix address system
Three-phase driven AC type PDPs are parallel to each other as shown in FIG.
Between front substrate 1 and back substrate 2 facing
Having a structure in which the gas space 4 is defined by the barrier ribs 3
ing. The rear substrate 2 has a plurality of electrodes on a rear glass plate 21.
A dress electrode W is formed in parallel, and a dielectric layer 23 is formed thereon.
Is formed thereon, and intersects with the plurality of address electrodes W thereon.
As shown in FIG._A, S_BIs formed,
Further, a dielectric layer 23 and an MgO layer 24 are formed thereon.
The barrier ribs 3 are formed by printing or the like. Front board
1 has a structure in which a phosphor layer 11 is provided on a front glass plate 10.
Become. Then, together with the substrates, a rare gas is
The MgO layer 24 is filled with a gas space 4 (pixel cell).
Is formed, and a plasma display device is formed.
It is. The operation of the plasma display device is
Electrode S to sustain electrode S_A, S_BThe specified voltage is marked between
When applied, a discharge occurs on the upper part of the rear substrate 2 where each electrode is located.
An area is created and the ultraviolet light emitted from the discharge area fluoresces
When the body layer 11 is excited to emit light, a light emitting region is created in the pixel cell.
I will. This discharge is caused by the address electrode W and the sustain electrode S_A, S_B
Is maintained by the sustain voltage applied between
It is extinguished by the erase pulse applied to the dress electrode W. [0005] The above three-phase drive AC type P
In the DP structure, a pair of sustain electrodes S are provided in one pixel cell._A,
S_BOnly exists, the discharge area is between the sustain electrodes.
Large spread toward the front substrate 1 unevenly centering on the top
It occurs. Therefore, the light emitting region generated by the discharge is discharged.
The portion closest to the power region has very high brightness. fluorescence
To protect the body layer 11 from ion bombardment, a barrier rib
It is necessary to increase the height of the gas
You. Further, the address electrode W and the sustain electrode S_A,
S_BSince all electrodes are supported on the same rear substrate 2,
Difficult to manufacture surface substrates. That is, the back substrate 2
Is to deposit the lower address electrode W,
And etching, and then the lower dielectric layer 2
3 and then the sustain electrode S_A, S_BEvaporation, foliosog
It is formed by luffing and etching, and then
Since it is formed by forming the electric body layer 23 and the MgO layer 24,
Back substrate manufacturing becomes complicated. Furthermore, on the same back substrate
Two-stage electrodes W and S_A, S_BNeed to provide
There are problems such as an unexpected increase in capacity and dielectric breakdown. Each telephone
Problems with the difference in thickness of the upper and lower dielectric layers over the electrodes of the pole group
There is also. That is, structurally, the upper dielectric layer is
This lower dielectric layer is covered by a thinner layer
Dielectric breakdown easily occurs, rear substrate structure is electrically weak
It will be. Further, recent plasma display devices
In response to the demand for larger screens, large and small pixel
Cell, address electrode and sustain electrode must be formed.
When assembling a large flat panel,
Since the number of element cells or electrode intersections is large,
In manufacturing, the cost is high and the yield is poor. The present invention
Provide a plasma display device that can simplify the process
The porpose is to do. [0008] SUMMARY OF THE INVENTION A plasma display according to the present invention is provided.
The play device has electrodes placed in directions that intersect each other.
Near an intersection of a plurality of electrode groups and the electrodes of the electrode group
Between the gas space formed in the electrode group and the gas space.
A display device comprising a pair of first and second substrates.
And the first substrateProvided on the same plane ofThree
Sustain electrode group arranged so as to form a setWhenThe said
2 boardsProvided in andIn the direction crossing the sustain electrode group
Address electrode group arrangedWhen,A set of three sustain electrodes
Group and pixels formed at each intersection of the address electrode group
Consisting of cells and The center of the set of three sustain electrodes
First sustaining electrode and / or second and third sustaining electrodes on both sides thereof
The poles face each other via a surface discharge gap for each of the pixel cells.
ProtrusionIt is characterized by having. [0009] According to the plasma display device of the present invention,
Utilizing the advantages of a three-phase drive structure that can drive at high brightness and high speed,
In addition, the manufacturing process can be simplified. [0010] Embodiments of the present invention will be described below with reference to the drawings.
I will explain it. As shown in FIG.
The address-type three-phase driven AC PDP is provided on the first substrate
That is, a pair of sustain electrodes S on the rear substrate 2_A, S_BPlaced between
Intermediate sustain electrode S_CAnd a second substrate, that is, a front substrate
1 in the direction crossing the sustain electrode and the intermediate sustain electrode
Address electrode W, dielectric layer 23 and MgO layer 2
4 is the same as the element structure shown in FIG.
It has structure. 1 and 2 are the same.
3 shows a binding member. In the PDP of this embodiment, the back substrate 2
Two parallel sustain electrodes S on the same plane_A, S_BAnd that
Third intermediate sustain electrode S in the middle of parallel electrodes_CIs the same
Lined up in a row. Same method as conventional three-phase drive with these three
Drive with Furthermore, in the display drive, the address (cell
Cannot be selected), so the address is assigned to the front substrate 1 on the opposite side.
Electrode W is formed so as to be orthogonal to the three electrodes.
I have. The rear substrate 2 is composed of three glass substrates.
Electrode S_A, S_BAnd intermediate sustain electrode S _CEvaporated, foliso
Simultaneously formed by lithography and etching, and one layer on top
Of the dielectric layer 23 and vapor deposition of the MgO layer 24
Can be formed. The front substrate 1 is placed on a front glass plate 10.
Dress electrode W, dielectric layer 23, MgO layer 24, and phosphor
The layer 11 is formed by sequentially forming a film. According to the present embodiment, the back substrate
Therefore, the conventional formation of the electrode and the dielectric layer is completed only once.
In addition, the manufacturing process is simplified and the obtained PDP
In the surface discharge type AC PDP by the three-phase driving method,
The advantages of high-speed driving with high luminance and high luminous efficiency can be utilized.
Furthermore, since the electrode capacity can be reduced, higher speed driving is possible.
It works. In addition, the space charge does not spread to the adjacent electrode, causing erroneous discharge.
And stable operation is possible. FIG. 3 and FIG.
As shown in FIG. 4, the pixel cell according to the present embodiment is
If driven by the three-phase driving method of the formula, the control signal for the image will be
Address pulse (write pulse and erase pulse
) To the group of address electrodes W1, W2,.
Implantation circuit 50 and sustain electrode S_A1, S_B1, S_C1, S_A
2, S_B2, S_CSupply sustain pulses to groups of 2, ...
Since the maintenance circuit 60 can be configured independently, crosstalk
Decrease. That is, as shown in FIG.
Spray device operation, if not displayed, maintain intermediate
Electrode S_CAnd sustain electrode S_AOr S_BIs applied between
Sustain voltage -V_SThe pulse is maintained. Displayed
In this case, the sustain electrode S is_AOr S_BWhen
When a write pulse of a predetermined voltage is applied during
Sustain electrode S_CAnd sustain electrode S_AInter or intermediate sustain electrode S_C
And sustain electrode S_BBack substrate where each electrode is located alternately between
2, a discharge region is formed at the upper part of
The phosphor layer 11 is excited by the ultraviolet light thus emitted, and emits light.
A light emitting region is generated in the element cell. This light emission is based on the sustain voltage -V
_SIs maintained by the sustain pulse of
It is extinguished by the applied narrow erasing pulse. In addition,
Instead of applying a narrow erase pulse to the dress electrode W
And the sustain electrode S_AOr S_BBetween the sustain pulses applied to
An erase pulse may be added. FIG. 5 shows S for each pixel cell._A, S_BSustain electrode and
Intermediate sustain electrode S_CThe following is an example of the arrangement. As shown in FIG.
Alternatively, an island-shaped portion I may be provided on the intermediate sustaining electrode, as shown in FIG.
(B) As shown in FIG._CFacing the protrusion P of
S_A, S_BThe sustaining electrode may be provided with an opposing projecting portion C.
Then, as shown in FIG._A, S_BProtruding facing only the sustain electrode
A part C may be provided. [0015] As described above, according to the present invention,
An electrode group consisting of a plurality of electrodes arranged in a crossing direction
And a gas space formed near the intersection of the electrodes of the electrode group,
From a pair of first and second substrates sandwiching the electrode group and the gas space
Display device, the number of first substrates is three every three.
A pair of sustain electrodes arranged in pairs are
And the second substrate is arranged in a direction intersecting the sustain electrode group.
Having address electrode group simplifies manufacturing and maintains
Discharge is uniform near the first substrate where the sustain electrode is provided
Does not affect the phosphor layer. Thin dielectric
Eliminates the intersection of sustain electrodes and address electrodes through the body layer
As a result, problems relating to an increase in capacity and dielectric breakdown are eliminated.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a conventional plasma display panel. FIG. 2 is a sectional view of the plasma display panel of the present embodiment. FIG. 3 is a block diagram of a drive circuit that applies an electric pulse to a sustain electrode group and an address electrode group of the plasma display device of the present embodiment. FIG. 4 is a timing chart showing a relationship between an electric pulse applied to a sustain electrode and an address electrode in one pixel cell and a light amount of the pixel cell. FIG. 5 is a plan view of S _A , S _B sustain electrodes and intermediate sustain electrodes S _C for each pixel cell on a first substrate. [Description of main parts of the code] 1 Front substrate 2 Rear substrate 3 barrier ribs 4 gas space 10 front glass plate 11 phosphor layer 21 back glass plate 23 dielectric layer 24 MgO layer S _A, S _B sustain electrodes S _C intermediate sustain electrodes W address electrode

Claims (1)

(57) Claims: 1. An electrode group comprising a plurality of electrodes arranged in a direction crossing each other, a gas space formed near an intersection of the electrodes of the electrode group, and the electrode What is claimed is: 1. A display device comprising a pair of first and second substrates sandwiching a group and a gas space, wherein sustain electrodes are provided on the same plane of the first substrate and are arranged so as to form a set of three electrodes. When, with the second address electrode group arranged in a direction intersecting with being and the sustain electrode group provided on the substrate, each of the three pair of the sustain electrodes and the address electrode group
A pixel cell formed at the intersection, and a first sustain electrode at the center of the set of three sustain electrodes and / or
Alternatively, the second and third sustain electrodes on both sides of the pixel cell
A plasma display device comprising: a protruding portion facing each other via a surface discharge gap .