JPH05266800A - Surface discharge type plasma display panel - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a surface discharge plasma display panel (PDP), and it is an object of the present invention to achieve high definition of the surface discharge PDP without lowering the brightness. [Structure] A plurality of display electrode pairs 12 parallel to each other and a plurality of address electrodes 22 orthogonal to each display electrode pair 12 are provided, and the display electrode pairs 12 and the address electrodes 22 are provided in the vicinity of respective intersections. In the surface discharge type plasma display panel 1 in which the discharge cell region EC is defined, the display electrode pair 12 includes a Y electrode 14 provided so as to pass through a central portion of the discharge cell region EC, and a Y electrode 14. It is composed of two X electrodes 13a and 13b provided on both sides with a discharge gap G1.

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). In recent years, the need for flat display devices and the spread thereof have been remarkable. Among them, the surface-discharge type PDP has been able to obtain high brightness and high contrast, has a long service life, and is relatively easy to display in color. To meet the needs of John and others, higher definition and higher brightness are desired.

[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 view showing a cross section and a 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 which are parallel to each other and a plurality of address electrodes 22 which are orthogonal to the respective display electrode pairs 12j. The display electrode pairs 12j and the address electrodes are provided. A discharge cell region EC is defined in the vicinity of each intersection with 22. The discharge cell region EC is formed mainly at the selected discharge cell formed at the intersection of one electrode of the display electrode pair 12j and the address electrode 22 and at the facing portion of the display electrode pair 12j near the selected discharge cell. This is a region defined by including discharge cells.

Each display electrode pair 12j has, for example, 5
It is composed of an X electrode 13j and a Y electrode 14j which are formed in parallel with each other with a discharge gap G1 of about 0 μm, and between the adjacent display electrode pairs 12j, 12j,
A large gap G2 of, for example, about 220 μm is provided in the case where no partition wall is provided in order to ensure the operation characteristics by separating the discharge cell regions EC adjacent to each other so as not to generate discharge.

The display electrode pair 12j is formed on a glass substrate on the back surface side (not shown), and the address electrode 22 is formed on the glass substrate 11 on the display surface side. Further, as shown in FIG. 7, the surface discharge type PDP 1 j includes a dielectric layer 17 made of low melting point 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 or the like 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, and, for example, a mixed gas of neon and xenon is filled in the discharge space 30. It is enclosed. On the glass substrate in the discharge space 30, grid- or stripe-shaped partition walls for partitioning the discharge cell region EC are provided as needed.

[0006]

In such a conventional surface discharge type PDP 1j, as shown in FIG. 7, the brightness of the central portion of each discharge cell region EC is high, but the brightness is lowered a little away from the central portion. Therefore, the overall brightness does not become so high.

In particular, when the width Wb of the discharge cell region EC is set to be small in order to achieve high definition, the values of the discharge gap G1 and the gap G2 cannot be reduced accordingly, so that the X electrodes 13j and Y electrode 14
It is necessary to make the line widths W1 and W2 of j considerably smaller. Therefore, there is a problem that the main discharge in the display electrode pair 12j is further reduced, the brightness is significantly reduced, and the operating characteristics such as a reduction in operating margin must be sacrificed.

Further, in order to secure the life of the phosphor 28, it is necessary to provide the gap G4 according to the discharge height, but as the discharge cell area EC becomes smaller, the discharge height relative to the size thereof becomes large. Therefore, a relatively high partition wall must be formed in order to secure the gap G4, which causes a problem that the manufacturing process for forming the partition wall becomes difficult.

It is also conceivable to make the gap G2 as small as possible and widen the line widths W1 and W2 by that amount, but in that case, the barrier ribs formed at the boundary of the discharge cell region EC must be raised. The problem arises.

In view of the above problems, it is an object of the present invention to provide a surface discharge type PDP with high definition without lowering the brightness.

[0011]

In order to solve the above-mentioned problems, the surface discharge type PDP 1, 1a according to the invention of claim 1
As shown in FIGS. 1 to 5, a plurality of display electrode pairs 12 parallel to each other and a plurality of address electrodes 22 orthogonal to each display electrode pair 12 are provided. The discharge cell area EC is provided near each intersection.
In the surface discharge type plasma display panel 1, 1a, wherein the display electrode pair 12 is provided on the Y electrode 14 so as to pass through the central portion of the discharge cell region EC.
And a discharge gap G1 on both sides of the Y electrode 14, respectively.
And two X electrodes 13a and 13b provided with a

A surface discharge type PDP 1a according to the invention of claim 2
Then, the Y electrode 14 is composed of a wide transparent electrode 41 and a narrow metal electrode 42 provided on the transparent electrode 41 at the central portion of the transparent electrode 41 so as to overlap with each other.
The X electrodes 13a and 13b are composed of metal electrodes having a width narrower than that of the Y electrode 14.

A surface discharge type PDP 1a according to the invention of claim 3
Then, two adjacent X electrodes 13a and 13b are integrally formed between adjacent display electrode pairs 12.

[0014]

In each discharge cell region EC, since discharge occurs at two places between the two X electrodes 13a, 13b and the Y electrode 14, not only the central portion of the discharge cell region EC but also the peripheral portion thereof. The discharge spreads, and as a result, the brightness of the entire discharge cell region EC is improved. Further, the discharge height does not become so large.

X electrodes 13 in adjacent discharge cell regions EC
Since the potentials a and 13b are the same, discharge does not occur between them, and the gap G3 can be made very small or zero, and they can be integrally formed.

The names of the X electrode and the Y electrode are for convenience, and they may be reversed. Further, the discharge cell region EC is formed at a selected discharge cell formed at an intersection of any one electrode of the display electrode pair 12 and the address electrode 22 and at a facing portion of the display electrode pair 12 near the selected discharge cell. This is a region defined for each intersection including the main discharge cells.

[0017]

1 is a plan view showing an electrode structure of a surface discharge PDP 1 according to the present invention, FIG. 2 is a view showing a cross section and a luminance distribution of the electrode structure of the surface discharge PDP 1 of FIG. 1, and FIG. It is a figure which shows the example of an electrode connection of surface discharge type PDP1. Since the basic structure of the surface discharge type PDP 1 is the same as that described in FIG. 7, its description will be omitted or simplified.

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

The width Wa of each discharge cell region EC is 0.2.
The display is highly precise in a rectangular shape having a length of about 2 mm and a width Wb of about 0.66 mm, and a set of a series of discharge cell regions EC along the longitudinal direction of each display electrode pair 12 constitutes each display line. is doing.

The size of the discharge gap G1 is 50 in the conventional case.
The thickness is, for example, 60 to 80 μm, which is larger than μm, whereby the spread of discharge is increased, the brightness is improved, and the life is extended. Between the adjacent display electrode pairs 12 and 12, since the adjacent X electrode 13a and X electrode 13b have the same potential, only a minute gap G3 is provided.

The width W of the two X electrodes 13a and 13b
The sizes of 3 and W4 are the same. The width W5 of the Y electrode 14 is larger than the widths W3 and W4 because power needs to be supplied to the two X electrodes 13a and 13b.

As shown in FIG. 3, the Y electrode 14
Need to be applied with a voltage for line selection, so they are drawn out separately.
Since a and 13b are common to each other and also to each line, all X electrodes 13a and 13b
b are collectively connected and pulled out.

Surface discharge type PDP 1 constructed as described above
Is displayed on the X electrodes 13a and 13b, for example.
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, the address pulse 22 is applied with the write pulse Va corresponding to the discharge cell region EC in which no display is performed.

As a result, the discharge cell region E where the display is performed
Surface discharge by the X and Y electrodes is repeated along the surface of the C dielectric 17, and the phosphor 2 is generated by the ultraviolet rays generated at that time.
8 is excited and emits light, which passes through the phosphor 28 and is visible from the outside of the glass substrate 11.

In such a surface discharge type PDP 1, two X electrodes 13a and 13b and a Y electrode are formed in the discharge cell region EC.
Since the discharge is generated at two places between the electrode 14 and the electrode 14, the discharge spreads not only to the central portion of the discharge cell region EC but also to the peripheral portion thereof, and as a result, the brightness of the entire discharge cell region EC is improved. Further, since the discharge height becomes low, even if the gap G4 of the discharge space 30 is made small, the same life as that of the conventional PDP can be obtained, and therefore the partition wall can be made low to facilitate the manufacturing. Further, 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, the light is the phosphor 2
8 is a so-called transmissive type, which is a so-called reflective type in which light is reflected by the phosphor 28 and viewed from the outside of the glass substrate on which the display electrode pair 12 is provided. 14 is a wide transparent electrode,
It may be configured by a metal electrode (bus electrode) provided so as to overlap the central portion of the transparent electrode.

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

The X electrodes 13a and 13b may be metal electrodes or may be composed of transparent electrodes and metal electrodes. FIG. 4 is a plan view showing an electrode structure of a surface discharge type PDP 1a according to another embodiment of 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, 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
4 is composed of 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 13b is simple, and disconnection of the X electrodes 13a and 13b hardly occurs. Since the overall width W6 of the electrode 13 can be further reduced, it is further advantageous in achieving high definition.

In the surface discharge type PDP 1a, the X electrode 13 may be composed of a transparent electrode and a metal electrode, and the Y electrode 14 may be composed of only a metal electrode when it is of a transmissive type.

According to the surface discharge type PDP 1, 1a of the above-mentioned embodiment, the brightness of the discharge cell region EC is improved, so that the fine lines are displayed brightly with the high definition, and the image quality is improved.

In the above embodiment, the surface discharge type PDP 1
It is also possible to make the width W3 of the X electrode 13a different from the width W4 of the X electrode 13b, thereby finely adjusting the discharge state and controlling so as to ensure the display during line scanning. The discharge gap G1 between the X electrodes 13a and 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, 1a can be variously changed other than the above.

[0035]

According to the present invention, it is possible to achieve high definition of the surface discharge type PDP without lowering the brightness.

[Brief description of drawings]

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

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

3 is a diagram showing an electrode connection example of the surface discharge PDP of FIG.

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

5 is a diagram showing a cross section of an electrode structure of the surface discharge PDP of FIG.

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

FIG. 7 is a diagram showing a cross section and a luminance distribution of an electrode structure of a conventional surface discharge 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 region G1 discharge gap

Claims (3)

[Claims] 1. A plurality of display electrode pairs (12) parallel to each other.
And a plurality of address electrodes (22) orthogonal to each display electrode pair (12), and the discharge cell region () near each intersection of the display electrode pair (12) and the address electrode (22). A surface discharge type plasma display panel (1) (1a) having a defined EC), wherein the display electrode pair (12) is provided so as to pass through a central portion of a discharge cell region (EC). An electrode (14) and a discharge gap (G) on each side of the Y electrode (14).
1) provided with two X electrodes (13a, 13)
A surface discharge type plasma display panel comprising: 2. The Y electrode (14) is provided with a wide transparent electrode (41) and a narrow width provided at the central portion of the transparent electrode (41) so as to overlap the transparent electrode (41). A metal electrode (42), and the X electrodes (13a, 13b) are the Y electrodes (14).
The surface discharge plasma display panel according to claim 1, wherein the surface discharge plasma display panel is made of a metal electrode having a width narrower than that of the metal electrode. 3. The surface discharge type according to claim 1, wherein two adjacent X electrodes (13a, 13b) are integrally formed between adjacent display electrode pairs (12). Plasma display panel.