Three electrodes face discharge type color plasma panel

Details Three electrodes face discharge type color plasma panel Three electrodes face discharge type color plasma panel

1999-02-02

2001-02-27

Hjerpe, Richard A. (Department: 2774)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S060000, C345S071000, C345S068000, C345S037000, C315S169400

Reexamination Certificate

active

06195074

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a plasma display panel, and more particularly to a three electrodes face discharge type color plasma display panel in which three electrodes forming a discharge cell are arranged to generate an address discharge and a face sustaining discharge in a discharge space of the discharge cell.
2. Description of the Prior Art
Generally, a plasma display panel (hereinafter simply referred to as PDP) is a planer display panel which makes a discharge phenomenon by using a mixed penning gas. That is, the PDP generates a luminescence by discharging gases based on Helium (He) or Neon (Ne) having a relatively high atmosphere pressure (above 100 Torr.) between electrodes which are closely arranged to each other and are coated with a dielectric substance.
The mixed penning gas mainly consists of Ne+Xe or Ne+He+Xe. The reason for using the mixed gas is that the mixed gas has a lower discharge start voltage as compare with that of a pure gas. The discharge start voltage varies according to sorts of gases, a pressure of the penning gas and a structure or shape of the panel.
The above PDP has following advantages as compare with other display devices.
First of all, the PDP can be manufactured as a large size because it can variously take the address lines and the scanning lines. In addition, the PDP can adopt a multiplex technique so that the driving circuits thereof can be reduced. Further, the PDP has a longer life span of 50,000 hours than a cathode ray tube (CRT) which has a life span of 20,000 hours.
In addition, the PDP has a simple construction and is adapted to mass production since it has no fragile parts except for a glass. The PDP has a non-linear shape, so it has a high quality resolution of 100 line/inch. Since the gas having a refractive index of “1” is discharged in the PDP, a light is not extinguished while being reflected in the PDP and an external light cannot be reflected or scattered by indicating materials. In addition, unlike other flat panels, the PDP is sealed by the glass in the atmosphere above 400° C. so that the PDP can be operated even when it is subjected to a high humidity or even when an active gas exists.
The PDP is divided into an AC type PDP and a DC type PDP according to a pattern of a driving voltage applied to the discharge cell. In the AC type PDP driven by a volts alternating current, the electrode is coated with an dielectric substance of a glass. On the other hand, in the DC type PDP, the electrode is not coated with the dielectric substance and a discharge current is generated when a discharge voltage is applied to the electrode.
FIG. 1
is a exploded perspective view for showing a conventional three electrode surface discharge type plasma display panel,
FIG. 2
is a structural view of a whole electrode for showing a conventional three electrode surface discharge type plasma display panel having a resolution of 853×480,
FIG. 3
is a cross-sectional view of a cell R
ij
(i is a column and j is a row) of a conventional three electrodes surface discharge type plasma display panel taken along line A
1
-A
2
of
FIG. 2
,
FIG. 4
is a cross-sectional view of a cell R
ij
(i is a column and j is a row) of a conventional three electrodes surface discharge type plasma display panel taken along line B
1
-B
2
of FIG.
2
.
Referring to
FIG. 1
, the conventional three electrodes face discharge type plasma display panel has a front glass substrate
10
, a back glass substrate
20
, a plurality of partition walls
30
, a plurality of scaninig and sustaining electrode lines Y, a plurality of common sustaining electrode lines X, a dielectric layer
11
, a magnesium oxide (MgO) protection film
12
, a plurality of address electrode lines
15
, and R, G and B fluorescent layers
21
a,
21
b
and
21
c.
The front glass substrate
10
and the back glass substrate
20
are parallely arranged at a predetermined interval. The plurality of partition walls
30
are arranged between the front glass substrate
10
and the back glass substrate
20
at a predetermined interval to form a plurality of discharge spaces.
The scanning and sustaining electrode lines Y are arranged at a predetermined interval on the front grass substrate
10
facing the back glass substrate
20
in a direction perpendicular to partition walls
30
. The plurality of common sustaining electrode lines X and the scanning and sustaining electrode lines Y are arranged in pairs and generate a sustaining discharge in the discharge spaces.
The dielectric layer
11
is formed on the plurality of common sustaining electrode lines X and the scanning and sustaining electrode lines Y so as to limit a discharge current and so as to generate a wall charge easily. The MgO protection film
12
is formed on the dielectric layer
11
in order to protect the common sustaining electrode lines X and the scaning and sustaining electrode lines Y. Also, the MgO protection film prevents the dielectric layer
11
from being eroded and corroded.
The plurality of address electrode lines
15
are parallely formed with the partition walls
30
on the back glass substrate
20
and generate the address discharge in the discharge spaces together with the sustaining electrode lines Y.
The R, G and B fluorescence layers
21
a,
21
b
and
21
c
are respectively formed on the address electrode lines
15
. When the sustaining discharge is generated by the common sustaining electrode lines X and the scanning and sustaining electrode lines Y, R, G and B visible lights are emitted from the R, G and B fluorescent layers
21
a,
21
b
and
21
c
as the R, G and B fluorescent layer
21
a,
21
b,
21
c
are excited by vacuum ultreviolet rays.
Referring to
FIG. 2
, four hundred eighty scanning and sustaining electrode lines Y
1
-Y
480
and four hundred eighty common sustaining electrode lines X
1
-X
480
are alternately arranged one by one on the same plane (on the front glass substrate). Two thousands five hundred fifty nine (853×3 (R, G and B)) address electrode lines R
1
, G
1
, B
1
, . . . , R
853
, G
853
and B
853
are arranged on the back glass substrate
20
such that they can be perpendicular to the scanning and sustaining electrode lines Y
1
-Y
480
and the common sustaining electrode lines X
1
-X
480
at a predetermined interval therebetween. R, G and B cells
50
,
51
and
52
are alternately formed at each intersection of the scanning and sustaining electrode lines Y
1
-Y
480
and the common sustaining electrode lines X
1
-X
480
and address electrode lines R
1
, G
1
, B
1
, . . . , R
853
, G
853
and B
853
. Accordingly, 1,228,320 (480×853×3) R, G and B cells have a matrix shape.
Referring to
FIGS. 3 and 4
, a scanning and sustaining line Yi and a common sustaining electrode line Xi are parallely formed on the front glass substrate
10
facing the back glass substrate
20
. A dielectric layer
11
having a predetermined thickness is formed on the scanning and sustaining electrode line Yi and the common sustaining electrode line Xi. The MgO protection film
12
is formed on the dielectric layer
11
.
In addition, a first partition wall
30
a
and a second partition wall
30
b
are perpendicularly arranged with the scanning and sustaining electrode line Yi between the front glass substrate
10
and the back glass substrate
20
in order to form a discharge space and prevent colors of cells from mixing with each other. An address electrode line Rj is formed on the back blass substrate
20
formed between the first partition wall
30
a
and the second partition wall
30
b.
The R fluorescent layer
21
a
is formed on the address electrode line Rj. Inside of the discharge space is filled with a penning mixed gas.
The above-mentioned R cell operates as follows.
The address discharge is generated between the scanning and sustaining electrode line Yi and the address electrode line Rj and charge particles are generated within the discharge space by the address discharge. By the charge particles, optimum wall charges

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