JP3234270B2 - Surface discharge type plasma display panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface discharge type plasma display panel (PDP). 2. Description of the Related Art In recent years, the need for flat-type display devices has been increasing and the spread thereof has been remarkable. Among them, surface-discharge type PDPs have started to penetrate OA equipment and large-sized publicity display devices, because high brightness and high contrast can be obtained, the life is long, and color display is relatively easy. There is a demand for higher definition and higher brightness for the needs of John and the like.

[0002]

2. Description of the Related Art FIG. 6 is a plan view showing an electrode structure of a conventional surface discharge type PDP 1j, and FIG. 7 is a diagram showing a cross section and luminance distribution of the electrode structure of a conventional surface discharge type PDP 1j.

The conventional surface discharge type PDP 1j has a plurality of display electrode pairs 12j parallel to each other and a plurality of address electrodes 22 orthogonal to each display electrode pair 12j. A discharge cell area EC is defined in the vicinity of each intersection with the discharge cell 22. The discharge cell area EC is mainly formed at a selected discharge cell formed at the intersection of one electrode of the display electrode pair 12j and the address electrode 22, and at a portion of the display electrode pair 12j in the vicinity of the selected discharge cell. And a discharge cell.

Each display electrode pair 12j has, for example, 5
It comprises an X electrode 13j and a Y electrode 14j formed in parallel with each other with a discharge gap G1 of about 0 μm, and between adjacent display electrode pairs 12j, 12j,
A large gap G2 of, for example, about 220 μm is provided in the case where there is no partition, in order to secure the operation characteristics by separating the adjacent discharge cell areas EC so that discharge does not occur.

The display electrode pair 12j is formed on a glass substrate on the back side (not shown), and the address electrode 22 is formed on the glass substrate 11 on the display surface side. As shown in FIG. 7, the surface discharge type PDP 1j includes a dielectric layer 17 made of low-melting glass, a protective film (not shown) made of MgO formed on the surface of the dielectric layer 17, and a glass substrate 11. It has a phosphor 28 of a predetermined emission color applied on the surface. A portion near the outer periphery of the glass substrate is sealed with sealing glass (not shown), whereby a discharge space 30 having a gap G4 is formed between the glass substrates. In the discharge space 30, for example, a mixed gas of neon and xenon is filled. It is enclosed. On the glass substrate in the discharge space 30, a grid-like or stripe-like partition for dividing the discharge cell area EC is provided as necessary.

[0006]

In such a conventional surface discharge type PDP 1j, as shown in FIG. 7, the brightness at the center of each discharge cell area EC is high, but the brightness is reduced a little away from the center. Therefore, the overall luminance is not so high.

In particular, when the width Wb of the discharge cell area EC is set to be small in order to achieve higher definition, the values of the discharge gaps G1 and G2 cannot be reduced correspondingly. Y electrode 14
It is necessary to considerably reduce the line widths W1 and W2 of j. Therefore, there is a problem that the main discharge in the display electrode pair 12j is further reduced, the luminance is significantly reduced, and the operation characteristics such as a reduction in an operation margin must be sacrificed.

In order to secure the life of the phosphor 28, it is necessary to provide a gap G4 corresponding to the discharge height. However, as the discharge cell area EC becomes smaller, the discharge height relative to the discharge cell area EC becomes smaller. Therefore, a relatively high partition wall must be formed to secure the gap G4, and there is a problem that a manufacturing process for forming the partition wall becomes difficult.

Further, for example, it is conceivable to make the gap G2 as small as possible so as to increase the line widths W1 and W2 by that much. Problems arise.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a surface-discharge type PDP with high definition without lowering the luminance.

[0011]

According to a first aspect of the present invention, there is provided a surface discharge type PDP, 1a for solving the above-mentioned problems.
As shown in FIGS. 1 to 5, the display electrode pair 12 includes a plurality of display electrode pairs 12 parallel to each other and a plurality of address electrodes 22 intersecting each display electrode pair 12. A surface discharge type plasma display panel 1, 1 in which a discharge cell area EC is defined at each intersection.
a, wherein the display electrode pair 12 is
Address electrode at the center in the array direction of the display electrode pairs
And a Y-electrode 14 provided to intersect with the Y-electrode 14 at both sides of the Y-electrode 14 with a discharge gap G1 therebetween.
A total of two X electrodes 13a and 13b provided in parallel with the electrodes
It is those composed of a.

A surface discharge type PDP 1a according to a second aspect of the present invention.
In the embodiment, the X electrodes 13a and 13b are narrower than the Y electrodes 14.

The surface discharge type PDP 1a according to the third aspect of the present invention.
In the display one Oite the display electrode pairs 1 2 adjacent electrodes
One X electrode 13a of the pair 12 and the other display electrode pair 12
One X electrode 13b is integrally formed as one electrode .

[0014]

In each discharge cell area EC, a discharge is generated at two places between the two X electrodes 13a and 13b and the Y electrode 14, so that not only the central part but also the peripheral part of the discharge cell area EC. Discharge is spread, and as a result, the overall brightness of the discharge cell area EC is improved. Also, the discharge height does not become too large.

X electrode 13 in adjacent discharge cell area EC
Since the electric potential is the same between a and 13b, no discharge occurs between them, and the gap G3 can be made minute or zero to form them integrally.

Note that the names of the X electrode and the Y electrode are for convenience, and these may be reversed. Further, the discharge cell area EC is formed at a selected discharge cell formed at the intersection of any one of the display electrode pairs 12 and the address electrode 22, and at an opposite portion of the display electrode pair 12 near the selected discharge cell. And an area defined for each intersection including the main discharge cell.

[0017]

FIG. 1 is a plan view showing an electrode structure of a surface discharge type PDP 1 according to the present invention, FIG. 2 is a view showing a cross section and luminance distribution of the electrode structure of the surface discharge type PDP 1 of FIG. 1, and FIG. FIG. 4 is a diagram showing an example of electrode connection of the surface discharge type PDP 1 of FIG. Since the basic structure of the surface discharge type PDP 1 is the same as that described in FIG. 7, the description is omitted or simplified.

As shown in FIG. 1, in the surface discharge type PDP 1, the display electrode pair 12 is formed in the discharge cell region E.
Y made of metal provided so as to pass through the center of C
The electrode 14 includes two X electrodes 13a and 13b made of metal provided with discharge gaps G1 and G1 on both sides of the Y electrode 14, respectively.

Each discharge cell area EC has a width Wa of 0.2.
It is highly refined into a rectangular shape having a length of about 2 mm and a vertical width Wb of about 0.66 mm. A set of a series of discharge cell areas EC along the longitudinal direction of each display electrode pair 12 constitutes each display line. are doing.

The size of the discharge gap G1 is 50
For example, 60 to 80 μm, which is larger than μm, the spread of discharge is increased, the luminance is improved, and the life is extended. Between the adjacent display electrode pairs 12, 12, only the minute gap G3 is provided because the adjacent X electrodes 13a and 13b have the same potential.

The width W of the two X electrodes 13a, 13b
3 and W4 have the same size. The width W5 of the Y electrode 14 is larger than the widths W3 and W4 because it is necessary to supply power to the two X electrodes 13a and 13b.

As shown in FIG. 3, the Y electrode 14
Are drawn separately because it is necessary to apply a voltage for line selection.
a and 13b are common to each other and to each line, so that all the X electrodes 13a and 13b
b are connected together and pulled out.

Surface discharge type PDP 1 constructed as described above
In the display, for example, X electrodes 13a and 13b
And the negative sustain pulse Vst for the Y electrode 14 respectively.
Are alternately applied, and a positive write pulse Vw is applied to the X electrodes 13a and 13b in synchronization with the sustain pulse Vs of the Y electrode 14. Further, an address pulse Va is applied to the address electrode 22 corresponding to the discharge cell area EC in which no display is performed.

As a result, the discharge cell region E in which display is performed
The surface discharge by the X and Y electrodes is repeated along the surface of the dielectric 17 of C, and the ultraviolet light generated at that time causes the phosphor 2 to emit light.
8 is excited and emits light, which passes through the phosphor 28 and can be seen from outside the glass substrate 11.

In such a surface discharge type PDP 1, two X electrodes 13a, 13b and Y
Since the discharge is generated at two places between the electrode 14 and the electrode 14, the discharge spreads not only to the central part but also to the peripheral part of the discharge cell area EC. As a result, the overall brightness of the discharge cell area EC is improved. Further, since the discharge height is reduced, even if the gap G4 of the discharge space 30 is reduced, a life equivalent to that of the conventional PDP can be obtained. Therefore, the partition walls can be reduced to facilitate manufacture. In addition, since the X electrodes 13a and 13b can be driven at the same potential, even if the gap G3 is reduced, the operating characteristics are not impaired.

In the surface discharge type PDP 1 described above, light is emitted from the phosphor 2.
8 is a so-called transmissive type, and a so-called reflective type in which light is reflected by the phosphor 28 and viewed from the outside of the glass substrate provided with the display electrode pair 12 is used as the Y electrode. 14 with a wide transparent electrode,
What is necessary is just to comprise with the metal electrode (bus electrode) provided over the center part of the transparent electrode.

The transparent electrode is formed by, for example, patterning a tin oxide film (Nesa film) having a thickness of about 2000 °, and the metal electrode is formed by sequentially depositing chromium, copper, and chromium by, for example, sputtering deposition. Thickness 1.
(About 2 μm) by patterning by photolithography.

The X electrodes 13a and 13b may be metal electrodes, or may be composed of a transparent electrode and a metal electrode. FIG. 4 is a plan view showing an electrode structure of a surface discharge type PDP 1a of another embodiment according to the present invention, and FIG. 5 is a view showing a cross section of the electrode structure of the surface discharge type PDP 1a of FIG.

In this surface discharge type PDP 1a, the adjacent X
The electrode 13a and the X electrode 13b are integrally formed by one electrode 13 made of metal. Also, the Y electrode 1
Reference numeral 4 includes a transparent electrode 41 and a metal electrode 42.

In the surface discharge type PDP 1a, the X electrodes 13a,
The pattern of the electrode 13 for the electrode 13b is simple, and the X electrodes 13a and 13b are hardly disconnected. Since the entire width W6 of the electrode 13 can be further reduced, it is more advantageous in achieving higher definition.

In the surface discharge type PDP 1a, the X electrode 13 may be constituted by a transparent electrode and a metal electrode, and in the case of a transmission type, the Y electrode 14 may be constituted only by a metal electrode.

According to the surface discharge type PDPs 1 and 1a of the above-described embodiment, the brightness of the discharge cell area EC is improved, and therefore, fine lines are displayed brightly with higher definition, and the image quality is improved.

In the above embodiment, the surface discharge type PDP 1
The width W3 of the X electrode 13a and the width W4 of the X electrode 13b can be made different from each other, whereby the discharge state can be finely adjusted so that the display can be controlled during line scanning. The discharge gap G1 between the X electrodes 13a, 13b and the Y electrode 14 may be different.

In the above embodiment, the surface discharge type PDP
The structure, shape, size, material, etc. of each part of 1 and 1a can be variously changed in addition to the above.

[0035]

According to the present invention, high definition of the surface discharge type PDP can be achieved without lowering the luminance.

[Brief description of the drawings]

FIG. 1 is a plan view showing an electrode structure of a surface discharge type PDP according to the present invention.

FIG. 2 is a diagram showing a cross section and a luminance distribution of an electrode structure of the surface discharge type PDP of FIG.

FIG. 3 is a view showing an example of electrode connection of the surface discharge type PDP of FIG. 1;

FIG. 4 is a plan view showing an electrode structure of a surface discharge type PDP according to another embodiment of the present invention.

5 is a view showing a cross section of an electrode structure of the surface discharge type PDP of FIG. 4;

FIG. 6 is a plan view showing an electrode structure of a conventional surface discharge type PDP.

FIG. 7 is a diagram showing a cross section and luminance distribution of an electrode structure of a conventional surface discharge type PDP.

[Explanation of symbols]

1, 1a Surface discharge type PDP (surface discharge type plasma display panel) 12 Display electrode pair 13a, 13b X electrode 14 Y electrode 22 Address electrode 41 Transparent electrode 42 Metal electrode EC Discharge cell area G1 Discharge gap

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H01J 11/00-11/02

Claims (3)

(57) [Claims] [Claim 1 further comprising a plurality of address electrodes intersecting the plurality of parallel display electrode pairs and the display electrode pairs each other, the discharge cell area is defined on each of the intersections between display electrode pairs and the address electrodes A surface-discharge type plasma display panel comprising : a display electrode pair at a central portion in an arrangement direction of the display electrode pairs in a discharge cell region .
The separating and Y electrode provided so as to intersect the address electrodes, respectively discharge gap on both sides of the Y electrode
A surface discharge type plasma display panel comprising a total of two X electrodes provided in parallel with a Y electrode . 2. A surface discharge type plasma display panel according to claim 1, wherein said X electrode is an electrode narrower than said Y electrode. Wherein the one Oite the adjacent display electrode pairs display collector
One X electrode of the pole pair and one X electrode of the other display electrode pair
Preparative the claims 1 Symbol mounting surface discharge type plasma display panel characterized by comprising integrally formed as one electrode.