KR100647625B1 - Plasma display panel and flat display device comprising the same - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display panel capable of low voltage addressing discharge and capable of improving maintenance of an address voltage. To this end, the present invention is a front substrate, a rear substrate disposed in parallel to the front substrate, disposed between the front substrate and the rear substrate, the partition wall defining the discharge cells together with the front substrate and the rear substrate, A plurality of pairs of sustain electrodes disposed to face each other with respect to each of the discharge cells, a plurality of address electrodes embedded in the rear substrate and disposed to intersect the pair of sustain electrodes, and disposed in the discharge cells; A plasma display panel including the phosphor layers and discharge gas in the discharge cells, and an inlet is provided at a position corresponding to each address electrode on a surface of the rear substrate facing the front substrate; Provided is a flat panel display provided.

Description

Plasma display panel and flat display device comprising the same

1 is an exploded perspective view illustrating a partial cutaway view of a plasma display panel according to an exemplary embodiment of the present invention;

FIG. 2 is a layout view of discharge cells and electrodes illustrated in FIG. 1;

3 is a cross-sectional view of a unit pixel including discharge cells illustrated in FIG. 1.

Explanation of symbols on the main parts of the drawings

100: plasma display panel 101: front substrate

102 back substrate 103 address electrode

104: dielectric layer 105: rear bulkhead

106: Y electrode 107: X electrode

108: front partition 109: protective layer

110: fluorescent layer 120: inlet

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel and a flat panel display having the same, and more particularly, to a plasma display panel and a flat panel display having the same, which can produce a strong electric field effect during address discharge.

Recently, a device employing a plasma display panel as a flat panel display device has a large screen and has excellent characteristics of high definition, ultra-thin, light weight, and wide viewing angle, and is easier to manufacture than other flat panel display devices. It is attracting attention as a large flat panel display device.

The plasma display panel is classified into a direct current (DC) type, an alternating current (AC) type, and a hybrid type according to an applied discharge voltage, and classified into a counter discharge type and a surface discharge type according to a discharge structure.

In the DC plasma display panel, all electrodes are exposed to a discharge space, and charges are directly transferred between the corresponding electrodes. In the AC plasma display panel, at least one electrode is surrounded by a dielectric layer, and discharge is performed by an electric field of wall charge instead of direct charge transfer between the corresponding electrodes.

In the DC plasma display panel, since the charge is directly transferred between the corresponding electrodes, there is a problem that the electrode is severely damaged. In recent years, the AC plasma display panel has been generally adopted.

In the case of such an AC plasma display panel, an address electrode, an X electrode, and a Y electrode are positioned to surround a discharge space defined by a front substrate, a rear substrate, and a partition wall. At the time of discharge, addressing discharge occurs first between the address electrode and the X electrode or the Y electrode, and then sustain discharge occurs between the X electrode and the Y electrode.

In the AC plasma display panel, however, a long discharge path between the address electrode and the X electrode or the Y electrode during the addressing discharge causes a high addressing discharge voltage and a slow maintenance of the address voltage.

Disclosure of Invention The present invention has been made to solve various problems of the conventional plasma display panel including the above-mentioned problems. In particular, it is an object of the present invention to provide a plasma display panel capable of low voltage addressing discharge and improving maintenance of an address voltage. There is this.

In order to achieve the above and other objects, the present invention is a front substrate, a rear substrate disposed in parallel to the front substrate, and disposed between the front substrate and the rear substrate, the front substrate and the rear substrate And a plurality of partition walls defining discharge cells, a plurality of sustain electrode pairs disposed to face each other with respect to each of the discharge cells, and a plurality of addresses embedded in the rear substrate and intersecting the sustain electrode pairs. An electrode, a phosphor layer disposed in the discharge cells, and a discharge gas in the discharge cells, and an inlet portion is provided at a position corresponding to each address electrode on a surface of the rear substrate facing the front substrate; The present invention provides a plasma display panel.

The present invention provides a flat panel display device having such a plasma display panel.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. These embodiments and drawings are intended to aid the understanding of the present invention, and the scope of the present invention is not limited to the following embodiments or the accompanying drawings, and will be obviously defined by the appended claims.

1 is an exploded perspective view illustrating a partial cutaway view of a plasma display panel 100 according to an exemplary embodiment of the present invention, FIG. 2 is a layout view of discharge cells and electrodes shown in FIG. 1, and FIG. 3 is shown in FIG. 1. A cross-sectional view of a unit pixel consisting of discharge cells shown is shown.

1 to 3, the plasma display panel 100 according to the exemplary embodiment of the present invention includes a front substrate 101 and a back substrate 102.

The back substrate 102 and the front substrate 101 are spaced at predetermined intervals to define a plurality of discharge cells C partitioned by the rear partition 105 and the front partition 108 therebetween. The transparent front substrate 101 is made of a material having good light transmittance, such as glass, and the back substrate 102 is generally made of glass.

Referring to FIG. 2, the front bulkhead 105 has a matrix in which a cross section of the discharge space has a quadrangle. However, the shape of the front bulkhead is not limited thereto, and as long as a plurality of discharge spaces can be formed, the front bulkhead may have various patterns, such as waffles and deltas. In addition, the cross section of the discharge space may be formed to be a polygon, such as a triangle, a pentagon, or a circle, an ellipse, or the like, in addition to the quadrangle.

In the front partition 108 facing each other with the discharge cells C interposed therebetween, the sustain electrode pairs 106 and 107 are disposed to face each other. The sustain electrode pairs each include an X electrode 107 and a Y electrode 106. The X electrodes 107 and the Y electrodes 106 are arranged in parallel at predetermined intervals. In this embodiment, the X electrodes 107 and the Y electrodes 106 are formed in a stripe shape. The X electrode 107 and the Y electrode 106 are not necessarily limited to those shown in the drawings, and only one X electrode 107 or one Y electrode 106 may be provided in one front partition 108.

The front partition 108 directly induces electrical charge between adjacent sustain electrodes 107 and 106 and prevents charged particles, electrons, and the like from directly damaging the sustain electrodes, thereby inducing charge and accumulating wall charges. It is desirable to be formed of a dielectric that can.

The protective layer 109 is preferably formed on the side surface of the front partition 108. The protective layer 109 prevents the front partition 108 and the sustain electrode pairs 106 and 107 formed of a dielectric from being damaged by the sputtering of plasma particles and lowers the discharge voltage by emitting secondary electrons. Do it. The protective layer 109 may be formed by applying magnesium oxide (MgO) to a side of at least the front partition 108 to a predetermined thickness, but is not limited thereto, and may also be formed on the inner surface of the front substrate 101. Can be. The protective layer 109 is mainly formed of a thin film by sputtering or E-beam epaporation.

The rear substrate 102 is disposed in parallel with the front substrate at a predetermined distance. The back substrate is generally formed using a material such as glass.

Address electrodes 103 extending in a direction crossing the sustain electrode pairs 106 and 107 are disposed on the front surface of the back substrate 102. The address electrodes 103 extend across the discharge cells C and have a stripe shape. The address electrodes 103 are for causing an address discharge and are discharges that occur between the Y electrode 106 or the X electrode 107 and the address electrode 103. In FIG. 3, the address electrode 103 is illustrated as extending in parallel with the X electrode 107 and the Y electrode 106, but this is for convenience of description, and in reality, the X electrode 107 and the Y electrode are illustrated. It is formed so as to intersect with the 106.

The address electrodes 103 are preferably embedded by the dielectric layer 104. The dielectric layer 104 is formed as a dielectric that can induce charge while preventing charged particles or the like from colliding with the address electrodes 103 during discharge. Such dielectrics include PbO, B ₂ O ₃ , SiO ₂ and the like.

The rear partition 105 is disposed between the front partition 108 and the dielectric layer 104 to define a space between the front partition 108 and the dielectric layer 104. In FIG. 1, the rear bulkhead 105 is partitioned into a matrix, but is not limited thereto. As long as a plurality of discharge spaces can be formed, various types of bulkheads, for example, an open bulkhead such as a stripe, may be used. It can be a closed bulkhead, such as a waffle, matrix, delta, or the like. In addition, the closed partition wall may be formed such that the cross section of the discharge space becomes a polygon such as a triangle, a pentagon, or a circle, an ellipse, or the like, in addition to the quadrangle as in the present embodiment. In addition, in the present embodiment, the front bulkhead 108 and the rear bulkhead 105 are formed to have the same shape, but may be formed to have different shapes.

The front bulkhead 108 and the rear bulkhead 105 may be integrated, where the unitary is not limited to being formed in the same process, and it means that the front bulkhead and the rear bulkhead are not damaged and are difficult to separate. In the present embodiment, the front partition 108 is formed on the front substrate 101, the rear partition 105 is shown as formed on the back substrate 102, the present invention is not limited to the above structure. That is, the front substrate 101 or the rear substrate 102 may be provided with a front partition wall and a rear partition wall.

In the discharge cells C, phosphor layers 110, and more specifically, red, green, blue, and white light emitting phosphor layers are coated to a predetermined thickness. The phosphor layer 110 is applied on the side of the rear partition 105 and the dielectric layer 104 opposite to the discharge cells C, but the position where the phosphor layers 110 are disposed is not limited thereto, and the discharge cell ( Can be placed in various locations within C).

In the discharge cells C, Ne, Xe, or a mixed discharge gas thereof is injected. In the case of the plasma display panel 100 according to the present invention, after manufacturing the front substrate 101 and the back substrate 102 separately, they are sealed and aligned with each other by a sealing member such as frit glass. To combine.

In the plasma panel 100 configured as described above, an address voltage is applied between the address electrode 103 and the Y electrode 106 to cause an addressing discharge, and as a result of the addressing discharge, the discharge cell C to select sustain discharge is selected. After that, when a discharge holding voltage is applied between the X electrode 107 and the Y electrode 106 of the selected discharge cell C, the wall charges accumulated on the X electrode 107 and the Y electrode 106 are maintained. Discharge occurs, and the vacuum ultraviolet rays are emitted while the energy level of the discharged gas excited during this sustain discharge becomes low. The vacuum ultraviolet rays excite the phosphors of the fluorescent layers 110 applied in the discharge cells C, and the visible light is emitted as the energy levels of the excited phosphors are lowered, and the visible light penetrates the front substrate 101. As it is emitted to form an image that can be recognized by the user.

In particular, in the present invention, since the X electrode 107 and the Y electrode 106 are disposed to face each other, the opposite discharge is performed during the sustain discharge. Therefore, the utilization of the discharge space is increased compared to the conventional surface discharge structure. Thus, the amount of plasma is increased, so that the brightness and luminous efficiency are improved. In addition, since the discharge is uniformly generated in the discharge cell, the discharge is stable.

In one embodiment of the present invention, the inlet portion 120 is provided at a position corresponding to each of the address electrodes 103 on the surface of the rear substrate 102 facing the front substrate 101.

In other words, as shown in FIGS. 1 and 3, an inlet 120 having a predetermined depth is provided on the surface of the dielectric layer 104 in which the address electrode 103 is embedded.

This lead-in portion 120 strengthens the field in the address electrode 103 so that the address voltage can be dropped during addressing discharge, and the discharge voltage can be kept long.

As shown in FIGS. 1 and 3, in order to strengthen the field at the address electrode 103, a plurality of irregularities are formed on the surface of the dielectric layer 104 in addition to forming a single inlet. You can also do it by zooming.

The plasma display panel according to the present invention has the following effects.

First, the field near the address electrode can be made stronger to lower the address voltage.

Second, maintenance of the address discharge voltage can be improved.

Third, since the sustain electrode pairs face opposite discharges, the discharge space is enlarged, the discharges are uniform, and the luminance and the luminous efficiency are improved.

Fourth, since the sustain electrodes including the opaque bus electrodes are not disposed on the front substrate, the visible light transmittance to the front substrate is improved and the luminance is increased.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (7)

Front substrate; A rear substrate disposed in parallel with the front substrate; A partition wall disposed between the front substrate and the rear substrate and defining discharge cells together with the front substrate and the rear substrate; A plurality of sustain electrode pairs disposed to face each other with respect to each discharge cell; A plurality of address electrodes formed on a surface of the rear substrate facing the front substrate and disposed to intersect the pair of sustain electrodes; A dielectric layer formed on a surface of the rear substrate facing the front substrate and provided to cover the address electrode; Phosphor layers disposed in the discharge cells; And A discharge gas in the discharge cells; And a lead portion at a surface of the dielectric layer facing the front substrate at positions corresponding to the address electrodes. The method of claim 1, And the sustain electrode pairs are disposed in the partition wall. The method of claim 1, The partition wall includes a front partition wall extending from the front substrate, and a rear partition wall extending from the rear substrate, And the sustain electrodes are included in the front partition wall. The method of claim 3, wherein And at least a surface of the front partition wall is covered by a protective film. The method of claim 1, The partition wall has a plasma display panel, characterized in that having a matrix shape for partitioning a plurality of discharge cells having a rectangular cross section. delete A flat panel display device comprising the plasma display panel according to any one of claims 1 to 5.

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