JP3664532B2 - Plasma display panel - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a plasma display panel (hereinafter referred to as PDP) of a plasma display device, and more particularly to improvement of a sustain electrode.
[0002]
[Prior art]
In recent years, a plasma display panel (PDP) is expected to be put to practical use as a large and thin color display device.
As is well known, the PDP is provided with a group of electrodes intersecting each other inside a pair of substrates arranged opposite to each other with an internal space (discharge space) interposed therebetween, and a discharge cell is configured to selectively emit light at the intersection of each electrode. It is configured.
In such a PDP, a plurality of sustain electrode pairs are formed on a glass substrate on the display surface side, and a dielectric layer and an MgO layer are sequentially formed. On the other hand, the glass substrate on the back side is crossed with the sustain electrode pairs. A plurality of address electrodes are formed, ribs that divide the internal space, and a phosphor layer are sequentially formed. After a pair of glass substrates are arranged to face each other, the periphery is sealed with sealing glass.
And it assembles by enclosing discharge gas after heating and exhausting an internal space through the vent provided in one glass substrate.
Conventionally, the vent hole is usually provided avoiding a discharge light emitting region (discharge cell region) at the corner of the glass substrate. Moreover, the discharge gap of each discharge cell is arrange | positioned at fixed intervals.
[0003]
[Problems to be solved by the invention]
By the way, when the PDP is left undisplayed for a long time, there is a problem that the discharge start voltage increases and it becomes difficult to discharge. In addition, when introducing the discharge gas in the manufacturing process of the PDP, impurities such as moisture are mixed in and adhere to the MgO layer of the cell near the discharge gas introduction hole, and there is a problem that the display operation becomes unstable. The present invention has been made in view of such circumstances, and an object thereof is to provide a PDP capable of performing a stable display operation.
[0004]
[Means for Solving the Problems]
The present invention relates to a front substrate and a rear substrate that are arranged to face each other through a discharge space, and a pair of row electrodes that extend parallel to each other in the horizontal direction on the inner surface of the front substrate and that are arranged to face each other through a discharge gap. A plurality of row electrode pairs, a dielectric layer covering the row electrode pairs, and extending vertically in the inner surface of the back substrate, and at each intersection with the row electrode pairs, a light emitting pixel region A plasma display panel including a plurality of column electrodes and discharge gas introduction holes formed at corners of the rear substrate, wherein the first light emitting pixel region having a first discharge gap and the first discharge gap The second light emitting pixel region having a second discharge gap that is narrower than that is mixed. Further, the second light emitting pixel region is disposed in a region near the discharge gas introduction hole.
[0005]
[Action]
Mixing light emitting pixel areas with narrow discharge gaps lowers the discharge sustaining voltage and discharge start voltage in the areas, making it easier to discharge, and the discharge increases the space charge in the discharge space, so other light emitting pixel areas in the vicinity The discharge start voltage and the discharge sustain voltage also decrease, and discharge becomes easier.
[0006]
【Example】
Hereinafter, embodiments will be described with reference to the drawings.
In the surface discharge type PDP shown in FIG. 1, the inner surface of the front glass substrate 1 that is the display surface (the surface facing the rear glass substrate 2) is composed of a plurality of transparent transparent conductive films 3 and metal films 4. The sustain electrodes are formed in parallel to each other. A sustain electrode pair is constituted by the sustain electrodes opposed to each other, and a discharge gap that forms the center of each light emitting region is formed at the facing portion.
Since the electrical resistance of the transparent conductive film 3 is relatively high, the metal film 4 is formed along the longitudinal direction. The metal film 4 has an area smaller than the area of the transparent conductive film 3 on each of the sustain electrode pairs and is provided on the edge of the sustain electrode pair opposite to the discharge gap. Furthermore, a dielectric layer 5 made of low-melting glass is formed on the inner surface side of the metal film 4 and is connected to the discharge space 7 via the MgO layer 6.
[0007]
On the other hand, an address electrode 8 is formed on the inner surface side of the rear glass substrate 2 on the opposite side, and a phosphor layer 9 is formed so as to cover it. The address electrodes 8 and the metal film 4 are arranged so as to cross each other, and ribs 10 for partitioning the discharge cells are provided. The periphery of the discharge space 7 where the front glass substrate 1 and the rear glass substrate 2 face each other is sealed with sealing glass (not shown). In addition, vent holes (not shown) are provided in the corners of the rear glass substrate 2 and are used to enclose the discharge gas in the discharge space through the glass tube.
The glass tube is sealed after introducing the discharge gas into the discharge space.
[0008]
FIG. 2 is a partial view showing the sustain electrode pair 21 of the present invention, and a part of the discharge gap is narrowed as shown in the figure. FIG. 3 shows a case where the gap shape of the sustain electrode pair is a straight type.
In the vicinity of the discharge gas introduction hole, there is a high possibility that impurities such as moisture remain, so it is effective to arrange a discharge cell having a narrow discharge gap in the vicinity thereof.
[0009]
【The invention's effect】
As described above, by mixing light emitting pixel regions with a narrow discharge gap, the discharge sustain voltage and the discharge start voltage in that region are lowered, and discharge becomes easier. As a result, the space charge in the discharge space is increased by the discharge, so that the discharge start voltage and the discharge sustain voltage in other neighboring light emitting pixel regions are also lowered, so that discharge is facilitated and stable display operation is possible.
According to the present invention, it is possible to stably light a PDP that has been left for a long time, and it is possible to evenly light a portion where the lighting of the panel changes due to a change in the discharge start / sustain voltage during the production process. It becomes.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a structure of a PDP according to the present invention.
FIG. 2 is a cross-sectional view showing a sustain electrode pair of a PDP according to the present invention.
FIG. 3 is a cross-sectional view showing a sustain electrode pair of a PDP according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Front glass substrate 2 ... Back glass substrate 3 ... Transparent conductive film 4 ... Metal film 5 ... Dielectric layer 6 ... MgO layer 7 ... discharge space 8 ... address electrode 9 ... phosphor 10 ... rib 21 ... rib 22 ... narrow gap 23 ···································· Suspension Electrode Pair 31 ·············································· Gap

Claims (2)

A front substrate and a rear substrate arranged opposite to each other through a discharge space , and a pair of row electrodes extending in parallel to each other in the horizontal direction on the inner surface of the front substrate and arranged to face each other via a discharge gap. A plurality of row electrode pairs, a dielectric layer covering the row electrode pairs, and a plurality of light emitting pixel regions that are arranged to extend in the vertical direction on the inner surface of the rear substrate and form intersections with the row electrode pairs. A plasma display panel comprising: a column electrode; and a discharge gas introduction hole formed at a corner of the back substrate ,
A plasma display panel comprising a first light emitting pixel region having a first discharge gap and a second light emitting pixel region having a second discharge gap that is narrower than the first discharge gap . The second light emitting pixel region, a plasma display panel according to claim 1, characterized in that it is arranged in the region in the vicinity of the discharge gas introduction hole.

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