JP3005013B2 - Plasma display panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] Regarding a plasma display panel, it is an object of the present invention to provide a plasma display panel with high definition of display without deteriorating reliability. In a plasma display panel provided with a discharge electrode and a partition for partitioning a pixel region, the discharge electrode is provided with an overhang portion covered by the partition.

[Industrial applications]

The present invention relates to a plasma display panel (PDP) that enables high-definition display.

PDP has excellent visibility among various flat display devices, and is expanding its applications. Therefore, high definition including color display (increase in display density) is desired.

[Conventional technology]

The dot matrix display type PDP, which displays characters and figures by combining dots (pixels) to emit light,
A pair of glass substrates on the display surface side and the rear surface side are disposed to face each other with a discharge space provided, and each discharge cell defined at or near each intersection of the strip-shaped electrodes arranged in a grid pattern is selectively discharged. It is composed of

In such a PDP, there is known a structure in which a phosphor that emits light by discharge is provided to enable multicolor display (for example, a surface discharge type PD disclosed in Japanese Patent Application Laid-Open No. 62-219438).
P).

The phosphor may be provided on either of the pair of substrates, but it is advantageous to provide the phosphor on the rear substrate in view of display luminance.

When the discharge mode is a surface discharge type, an electrode (main discharge electrode) for emitting the phosphor is provided on the substrate on which the phosphor is not provided, in order to prevent deterioration of the phosphor. Can be That is, when the phosphor is provided on the substrate on the back side, the main discharge electrode is provided on the substrate on the display surface side.

In particular, in a PDP for color display, partitions (ribs) for partitioning a discharge space for each pixel in order to improve color separation between adjacent pixels.
Is provided.

[Problems to be solved by the invention]

Needless to say, in order to increase the definition of the display, it is necessary to reduce the width of the electrodes and the pitch between the electrodes in accordance with the reduction of each pixel region.

Further, in the case where an electrode made of a metal film which is advantageous in terms of manufacturing cost is provided on the substrate on the display surface side, it is desirable to reduce the width of the electrode as much as possible in order to prevent a decrease in luminance due to light shielding.

However, when the width of the electrode is reduced, there is a problem that the adhesion to the substrate is reduced, the electrode is easily peeled from the substrate, and the reliability of the PDP is impaired.

The present invention has been made in view of the above problems, and has as its object to provide a plasma display panel that achieves high definition display without deteriorating reliability.

[Means for solving the problem]

The device according to the first aspect of the present invention has a plurality of strip-shaped discharge electrodes 13 and 14 on the surface of at least one of the substrates 10 opposed to each other with the discharge space 30 interposed therebetween. In the plasma display panel 1 having a partition wall 15, the discharge electrodes 13 and 14 are provided with a plurality of overhang portions 13 a and 14 a which are entirely covered by the partition wall 15 with respect to the discharge space 30.
It has.

(Operation)

The joint area between the discharge electrodes 13, 14 and the substrate 10 increases by the amount of the overhang portions 13a, 14a, and the discharge electrodes 13, 14 and the substrate 10
Adhesive strength is strengthened.

Since the overhang portions 13a and 14a are covered by the partition walls 15, no discharge occurs at the overhang portions 13a and 14a.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a main part of a PDP 1 according to the present invention.
FIG. 3 is a sectional front view showing a PDP 1 according to the present invention, and FIG.
FIG. 3 is a plan view as viewed from an arrow III.

2 and 3, the PDP 1 has a glass substrate 10 having an upper surface serving as a display surface 10F, a rear glass substrate 20, and an inner surface of the glass substrate 10 extending in the horizontal (X) direction in FIG. A plurality of discharge sustaining electrode pairs 12 composed of a pair of main discharge electrodes 13 and 14, a grid-like partition wall 15, a plurality of address electrodes 22 extending in the vertical (Y) direction on the inner surface of the glass substrate 20, and a plurality of address electrodes 22. A partition wall 25 extending in the vertical direction provided therebetween, and phosphors 28 of a predetermined emission color provided so as to expose the address electrodes 22 at predetermined intervals in the vertical direction between the partition walls 25, etc. And the internal discharge space 30
For example, a mixed gas of neon and xenon is sealed.

The pair of discharge sustaining electrodes 12 is formed by patterning a metal film having a three-layer structure of chromium (Cr) -copper (Cu) -chromium (thickness: about 5000 mm), which is formed by sputtering, by photolithography.

The main discharge electrodes 13 and 14 of each discharge sustaining electrode pair 12 are provided with protrusions 13a and 14a that protrude between the main discharge electrodes 13 and 14 at regular intervals in the horizontal direction.

FIG. 1 shows a state in which the glass substrate 10 is viewed from the discharge space 30 side, and the overhang portions 13a and 14a are covered with the partition walls 15 as well shown in FIG. Thus, the overhangs 13a and 14a are isolated without being directly exposed to the discharge space 30.

Each discharge sustain electrode pair 12 is covered with a dielectric layer (not shown) and a protective layer made of magnesium oxide (MgO) or the like.

2 and 3, the partition walls 15 and the partition walls 25 are three-dimensionally intersecting with each other in the discharge space 30 so that the tops thereof are in contact with each other, and the partition walls 15 and the partition walls 25 form the pixel region GE. It is partitioned. That is, the rectangular pixel area GE surrounded by the partition 15 corresponds to one dot. The partition wall 15 is formed by screen-printing low-melting glass, and has a width of about 50 μm. Further, in one pixel region GE, the horizontal interval between the partition walls 15 is 0.1 to 0.1.
It is about 2 mm, and the vertical interval is about 0.3 to 0.36 mm.

In the PDP 1, the main discharge electrodes 13 opposed via the discharge space 30
A discharge cell WC for address is selected at the intersection of the pixel and the address electrode 22 to select a display pixel.
Discharge cells SC for display are defined in the GE at opposite portions of the main discharge electrodes 13 and 14.

In displaying on the PDP 1 configured as described above, first, a voltage exceeding the discharge starting voltage is applied between the main discharge electrode 13 and the main discharge electrode 14 of each discharge sustaining electrode pair 12 to discharge in line units. And then, for each line,
A discharge erasing pulse is applied to the address electrodes 22 corresponding to the pixels unnecessary for display, and the discharge is stopped by eliminating the wall charges in the corresponding discharge cells SC.

A discharge sustaining voltage lower than the discharge starting voltage is applied to the discharge sustaining electrode pair 12, and the discharge is continued in the discharge cells SC corresponding to the display pixels. As a result, the phosphors 28 facing the discharge cells SC during discharge emit light when excited by ultraviolet rays generated by the discharge.

At this time, as described above, since the overhangs 13a and 14a are separated from the discharge space 39, the overhangs 13a and 14a do not affect light emission.

FIG. 4 is a plan view showing a main part of a PDP 1a according to another embodiment of the present invention. FIG. 4 shows a state in which the display surface 10F side is viewed from the discharge space 30 as in FIG. 1, and the same components in FIG. 4 have the same functions as those in FIG. 1 to FIG. Are attached.

In the PDP 1a, a pair of main discharge electrodes 130 and 14 parallel to each other are formed on the surface of the glass substrate 10 on the display surface side so as to pass through the central portion in the vertical direction of the pixel region GE defined by the partition wall 15.
A discharge sustaining electrode pair 120 made of zero is provided. Therefore, the bright points of the display are mainly at both ends in the vertical direction of the pixel area GE.

The main discharge electrodes 13 and 14 of each discharge sustaining electrode pair 12 are provided with overhanging portions 130a and 140a that overhang in the longitudinal direction of the pixel region GE at regular intervals in the horizontal direction. 130a and 140a are covered with the partition wall 15.

According to the above-described embodiment, the width of the main discharge electrodes 13 and 14 made of a metal film provided on the glass substrate 10 on the display surface side can be reduced to about 50 μm, and the amount of light emitted from the display surface 10F is increased. Brightness can be increased.

In the above embodiment, the overhang portions 13a, 14a, 130a, 140a
May be covered with the partition wall 15, and the plane shape and the arrangement interval may be appropriately selected.

In the above-described embodiment, the arrangement relationship between the address electrodes 22 and the phosphors 28 inside the pixel region GE and the state of exposure of the address electrodes 22 can be changed as appropriate.

In the above-described embodiment, the PDP 1 in which the phosphor 28 is formed on the surface of the glass substrate 20 on the back side is illustrated, but the present invention is also applied to a PDP in which the phosphor 28 is provided on the glass substrate 10 on the display surface side. be able to. Further, the discharge mode is not limited to the surface discharge type, but may be a counter discharge type.

〔The invention's effect〕

According to the present invention, high definition display can be achieved without loss of reliability.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a PDP according to the present invention, FIG. 2 is a sectional front view showing a PDP according to the present invention, FIG. 3 is a plan view taken along the arrow III of FIG. FIG. 9 is a plan view showing a main part of a PDP according to another embodiment of the present invention. In the figure, 1 is a PDP (plasma display panel), 10 is a glass substrate (substrate), 13 and 14 are main discharge electrodes (discharge electrodes), 13a and 14a are overhangs, 15 is a partition wall, and 130 and 140 are main discharge electrodes ( 130a, 140a are overhang portions, and GE is a pixel area.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Teruo Kurai 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (56) References JP-A-63-80445 (JP, A) JP-A-3-233829 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01J 11/02

Claims (1)

(57) [Claims] 1. A plasma display panel having a plurality of strip-shaped discharge electrodes on the surface of at least one of a pair of substrates facing each other across a discharge space, and having a partition in the discharge space. The plasma display panel according to claim 1, wherein the discharge electrode has a plurality of overhangs that are entirely covered by the partition walls with respect to the discharge space.