Plasma display panel having a particular dielectric structure

Details Plasma display panel having a particular dielectric structure Plasma display panel having a particular dielectric structure

1999-04-02

2003-02-25

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Three or more electrode discharge device

C313S584000, C313S587000, C313S493000

Reexamination Certificate

active

06525470

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a plasma display panel (PDP) of an AC driven surface discharge type.
Recently, there is expectation of realization of the AC driven surface discharge type PDP as a large and thin color display.
FIG. 15
shows a conventional PDP of the AC driven surface discharge type. The PDP comprises a pair of front and back glass substrates
1
and
6
disposed opposite to each other, interposing a discharge space
8
therebetween. The glass substrate
1
as a display portion has a plurality of row electrodes X and Y which are alternately disposed in pairs to be parallel with each other at the inside portion thereof. The row electrodes X and Y are covered by a dielectric layer
4
. A protection layer
5
made of MgO is coated on the dielectric layer
4
. Each of the row electrodes X and Y comprises a transparent electrode film
2
formed by an ITO having a large width and a metallic electrode (bass electrode)
3
formed by a metallic film having a small width and layered on the transparent electrode
2
for compensating the conductivity of the film
2
.
On the glass substrate
6
, a plurality of data electrodes D are formed to intersect the row electrodes X and Y on the glass substrate
1
. A fluorescent layer
7
covers the data electrodes D. The discharge space
8
is filled with rare gas consisting of neon mixed with xenon. Thus, a pixel cell is formed at the intersection of the row electrodes in pairs and the data electrode.
The dielectric layer
4
is formed by applying glass paste having a low melting point on the X, Y electrodes and by baking it. The metallic electrode
3
is formed by aluminum or aluminum alloy or silver.
In the conventional AC-PDP, the row electrodes X, Y are positioned on the same plane. Therefore, when a potential difference is given between the electrodes, a potential distribution E in the discharge space
8
becomes ununiform as shown in FIG.
16
. As a result, there occurs problems that the strength of the electric field in the discharge space reduces, so that the discharge starting voltage becomes high.
In addition, the row electrodes are liable to be influenced by the potential of address electrode and the height of rib, thereby the operation becomes unstable.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a plasma display panel the discharge starting voltage of which is reduced, thereby increasing the reliability of the display.
According to the present invention, there is provided a plasma display panel having a pair of substrates, a pair of opposed row electrodes disposed inside the display side substrate interposed by a discharge gap, and a dielectric layer covering the row electrodes, wherein the dielectric layer is formed except the discharge space, thereby forming a vacant space in the discharge gap.
The display side substrate has a groove corresponding to the vacant space.
The display panel has a medial layer on the underside of the display side substrate, and a groove is formed corresponding to the vacant space.
One of the row electrodes has an island shape.
The vacant space may be independent at every pixel cell divided by opposite partitions.
A plurality of vacant spaces may be provided between the row electrodes.
These and other objects and features of the present invention will become more apparent from the following detailed description with reference to the accompanying drawings.


REFERENCES:
patent: 3896327 (1975-07-01), Schermerhorn
patent: 5703437 (1997-12-01), Komaki
patent: 5736815 (1998-04-01), Amemiya
patent: 5952782 (1999-09-01), Nanto et al.
patent: 5977708 (1999-11-01), Amatsu et al.
patent: 6084349 (2000-07-01), Ueoka et al.
patent: 6255780 (2001-07-01), Komaki et al.
patent: 54-158859 (1979-12-01), None
patent: 56-120052 (1981-09-01), None
patent: 57-67262 (1982-04-01), None

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